Stretcher having hand actuated caster braking apparatus
Abstract
This record has no abstract on file.
Term
0.3 yearsleft in the term
Expires 19 January 2027.
- Priority
- Filed
- Granted
- Today
- Expires
15 claims: 11 independent, 4 dependent
- 1フレームと、 前記フレームに連結されて、床の上方で前記フレームを支持している複数のキャスターと、 前記複数のキャスターのうちの少なくとも一つのキャスターに連結されるブレーキであって、前記少なくとも一つのキャスターに対して移動可能な第一及び第二の部分を含み、第一および第二のブレーキ位置を有するブレーキと、 前記フレームに連結されて前記ブレーキを前記第一のブレーキ位置に配すべく動作可能なブレーキペダルと、 前記フレームに連結されて、床に沿って患者支持装置を操縦するために把持可能な押しハンドルと、 前記押しハンドルに連結されて、 前記 ブレーキを 前記第二のブレーキ位置に配すべく 動作可能なブレーキハンドルと 、を備え、 (i)前記ブレーキの前記第一及び第二の部分は、前記第一のブレーキ位置にある場合には第一の力で前記複数のキャスターのうちの前記少なくとも一つのキャスターと係合し、(ii)前記第二のブレーキ位置にある場合には、前記ブレーキの前記第一の部分のみが、第二の力で前記前記複数のキャスターのうちの前記少なくとも一つのキャスターと係合し、(iii)前記第二の力は前記第一の力よりも小さいこと、 を 特徴とする 患者支持装置。
- 2前記フレームが、下方フレームと、前記下方フレームの上方で支持されて前記下方フレームに対して移動可能となっている上方フレームとを備えており、 前記複数のキャスターが前記下方フレームに連結されており、 前記押しハンドルが前記上方フレームに連結されていることを特徴とする請求項1の装置。
- 3前記フレームが、第一端部と第二端部とを端部ごとに2つのコーナー領域を伴って有しており、 前記複数のキャスターが、4つの前記コーナー領域の付近で前記フレームに連結された4つのキャスターを備えていることを特徴とする請求項1の装置。
- 4前記4つのキャスター のそれぞれが、前記キャスターに連結されるブレーキを有しており 、 前記ブレーキペダルは、前記ブレーキのうちの少なくとも一つを前記第一のブレーキ位置に配し、 前記ブレーキハンドル は 、 前記 ブレーキのうちの 少なくとも 2つ を前記第二のブレーキ位置に配する ことを特徴とする請求項 3 の装置。
- 5前記押しハンドルが、前記フレームに連結された近位端と、遠位端とを有しており、前記ブレーキハンドルが前記遠位端に連結されていることを特徴とする請求項 4 の装置。
- 6前記ブレーキハンドルから前記押しハンドルを通るケーブルをさらに備えている請求項1の装置。
- 7前記押しハンドルが中空のチューブ部分を有しており、 前記ケーブルが前記中空のチューブ部分を通っていることを特徴とする請求項 6 の装置。
- 8前記押しハンドルが、概ね垂直に延在する部分と概ね水平に延在する部分との交差部分を画定する領域において曲がり部を有しており、 前記ケーブルが前記曲がり部を通過していることを特徴とする請求項 6 の装置。
- 9前記概ね水平に延在する部分が、前記フレームの長手方向軸に対して概ね垂直に延在していることを特徴とする請求項 8 の装置。
- 10前記押しハンドルが底部部分を有しており、 前記ケーブルが、前記底部部分から前記押しハンドルを脱出していることを特徴とする請求項 6 の装置。
- 11横方向軸を軸として回転可能に前記下方フレームに連結されたブレーキロッドをさらに備えており、 前記ブレーキロッドが、 前記ブレーキを前記第一のブレーキ位置及び前記第二のブレーキ位置に移動させるべく 回転可能となっており、 前記ケーブルが前記ブレーキロッドに連結されており、 前記 ブレーキハンドルを動かしたときに前記ケーブルが前記ブレーキロッドの回転を引き起こすことを特徴とする請求項 6 の装置。
- 12前記フレームが、下方フレームと、前記下方フレームの上方で支持されている上方フレームとを有しており、 前記下方フレームが、第一端部と、第二端部と、第一側と、第二側とを有しており、 複数のブレーキペダルをさらに備えており、この複数のブレーキペダルのうち、前記下方フレームの前記第一側と前記第二側に隣接して位置しているものもあれば、前記下方フレームの前記第一端部と第二端部に隣接して位置しているものもあることを特徴とする請求項1の装置。
- 13前記下方フレームの前記第一端部と前記第二端部に隣接した前記ブレーキペダルが、前記下方フレームの長手方向軸に対して平行に延在しているシャフトに連結されていることを特徴とする請求項 12 の装置。
- 14前記長手方向シャフトに連結された前記ブレーキペダルが、蝶形のペダルを備えていることを特徴とする請求項 13 の装置。
- 15フレームと、 前記フレームに連結された複数の車輪と、 前記複数の車輪のうちの少なくとも一つに連結され 、第一および第二の部分を備える ブレーキと、 前記フレームに連結されたブレーキペダルであって、前記ブレーキ の前記第一及び第二の部分の両方 が第一の力でその対応する車輪と係合するようなブレーキ位置と、前記ブレーキ の 前記 第一及び第二の部分の両方 がその対応する車輪との係合から解除されるような解除位置との間で、前記フレームに対して動作可能となっているブレーキペダルと、 前記フレームに連結された押しハンドルと、 前記押しハンドルに連結されたブレーキ作動部であって、前記ブレーキ の前記第一の部分のみ が前記第一の力よりも小さい第二の力でその対応する車輪と係合するような第一位置と、前記ブレーキがその対応する車輪との係合から解除されるような第二位置との間で、前記押しハンドルに対して動作可能となっているブレーキ作動部とを備えている患者支持装置。
Independent claims15
72 paragraphs, as filed
The present disclosure relates to patient support devices, such as stretchers, which have wheels or casters for moving the patient support device to each location as a whole. More specifically, the present disclosure relates to caster braking devices for such patient support devices. The present invention also relates to foot pedals for operating other mechanisms, such as elevating adjustment mechanisms.
Stretchers are typically designed to be moved to different locations in hospitals or other medical facilities. Thus, the stretcher has wheels or casters that allow the stretcher to move between locations. It is desirable for the wheels to rotate freely during the move, but once the desired location is reached, the casters are usually braked to keep the stretcher in the desired location. It is well known that the stretcher includes casters having a mechanism for preventing the rotation of the casters and the turning operation of the caster yoke. Usually, a foot pedal is provided to control the caster braking mechanism of the casters.
In conventional stretchers, when the casters are braked, the corresponding braking mechanism usually engages the caster wheels with sufficient force to prevent any rotation of the caster wheels. It is possible to keep the stretcher stationary for a variety of practical purposes. However, on the other hand, in the movement of a stretcher having a conventional caster brake mechanism of this kind, there are also situations where the moving person wants to slow down the stretcher during the movement. For example, it is assumed that the stretcher is pushed down with a ramp of the type often seen in medical facilities, but in this case, it is not desired to completely stop the rotation of the caster wheels, so the conventional method This purpose cannot be achieved by using the caster brake mechanism.
Although the term "stretcher" is used throughout this disclosure, the teachings of this disclosure can also be applied to other types of patient support devices other than stretchers, such as hospital beds, imaging tables, operating tables, etc. Is. Therefore, it is understood that the term "patient support device" used in this description and claims includes any kind of patient support device such as a stretcher, a hospital bed, an imaging table, an operating table, and the like. I want to.
<p> The present invention may include one or more of the features listed in the appended claims, or one of the following features or a combination thereof, which may comprise a patentable object alone or in any combination. It is equipped with a device having one or more.</p><p> The patient support device can be gripped to steer the frame, a plurality of casters connected to the frame and supporting the frame above the floor, and the patient support device connected to the frame to steer the patient support device along the floor. It may have a push handle and a brake handle that is connected to the push handle and can operate to brake at least one of the casters. The frame may have a lower frame and an upper frame supported above the lower frame. The plurality of casters may be connected to the lower frame, or the push handle may be connected to the upper frame.</p><p> The device may have a brake pedal that is coupled to the frame and is operable to brake at least one of the casters. The brake pedal may be movable to a braking position such that the brake engages the at least one caster with the first force, the brake handle, the brake from the first force. It may be possible to move to a braking position that engages at least one of the casters with a small second force.</p><p> The frame may have a cranial end and a foot end with two corner regions at each end. The plurality of casters may include four casters connected to the frame in the vicinity of the four corner regions. The device may have a brake connected to each of the four casters and a brake pedal connected to all four brakes. The push handle may be connected to the frame near the head end, and the brake handle may be connected to two of the brakes located near the head end of the frame. You may.</p><p> The push handle may have a proximal end connected to the frame and a distal end, and the brake handle may be connected to the distal end. The push handle may have a hollow tube portion and the device may have a cable through the hollow tube portion. The push handle may have a bottom portion, and the cable may escape the push handle from the bottom portion. The push handle may have a portion extending substantially vertically and a portion extending substantially horizontally. The portion extending substantially horizontally may extend laterally inward with respect to the portion extending substantially vertically.</p><p> The device may have a brake rod rotatably connected to the lower frame in the vicinity of the head end portion about the lateral axis. The brake rod may be connected to the two brakes located near the head end. The brake so that the cable causes rotation of the brake rod in a direction that causes the two brakes to engage their respective corresponding caster wheels when the brake handle is moved to the brake position. It may be connected to a rod.</p><p> The device includes a frame, a first shaft rotatably connected to the frame about a lateral axis, a second shaft rotatably connected to the frame about a longitudinal axis, and the first. is coupled to the shaft, by one rotation of said first shaft and said second shaft, said first shaft and said second shafts movable frame member to rotate the other of the bets is longitudinal May have a frame member that moves in the longitudinal direction connected to the second shaft so as to perform the above. By rotating the first shaft in the braking direction and the straight traveling direction, the second shaft may rotate in the corresponding braking direction and the straight traveling direction. By rotating the second shaft in the braking direction and the straight-ahead direction, the first shaft may rotate in the corresponding braking direction and the straight-ahead direction. A pair of casters with brakes may be connected to the frame. The device may have a third shaft that is rotatable about a second lateral axis to actuate or release the brakes on the pair of casters. The first linkage may connect the first shaft to the frame member, the second linkage may connect the third shaft to the frame member, and the third linkage may connect the third shaft to the frame member. It may be connected to the second shaft.</p><p> Further features may comprise a patentable subject, either alone or in combination with any other feature, such as those listed above or in the appended claims. These features will become apparent to those skilled in the art in light of the detailed description of the exemplary embodiments set forth below. These embodiments exemplify the best embodiments of the currently understood embodiments.</p>
<< Detailed explanation of drawings >> Referring to FIG. 1, a patient support device such as a stretcher 20 is supported on casters 24 by a lower frame 22, an upper frame 26 connected to the lower frame 22 by an elevating adjustment mechanism 28, and an upper frame 26. It has a patient support deck 30 connected to, a cranial end 32, a foot end 34, a long left side 36, a long right side 38, and a longitudinal axis 40. The deck 30 has a head portion 42, a seat portion 44, a thigh portion 46, and a foot portion 48 arranged at intervals in the longitudinal direction. Each part 42, 44, 46, 48 of the deck forms an upward facing support surface that supports the mattress pad (not shown), which will support the patient. As shown in FIG. 8, each of the casters 24 has a stem 60, a yoke or fork 62 rotatably connected to the stem 60 about the vertical axis 420 (FIG. 2), and a horizontal axis 422 (FIG. 2). It has a caster wheel 64 rotatably connected to a yoke 62 on a shaft. The casters 24 allow the stretcher 20 to travel on the floor 50 to carry the patient. A pair of foldable side rails 56, 58 are attached to the upper frame 26 adjacent to the left side 36 and the right side 38 of the deck 30. The side rails 56 and 58 can be individually moved between the descending position (the position shown with respect to the left side rail 56 in FIG. 1) and the ascending position (the position indicated with respect to the right side rail 58 in FIG. 1). ..
As used in this description, the phrase "cranial end 32" is used to indicate the end of any type of object referred to that is closest to the cranial end 32. used. The phrase "foot end 34" is used to indicate the end of any type of object referred to that is located closest to the foot end 34. Similarly, the phrase "left side 36" is used to indicate the side of an object of any type referred to that is closest to the left side 36. The phrase "right side 38" is used to indicate the side of an object of any type referred to that is closest to the right side 38.
A pair of push handles 66, 68 are attached to the upper frame 26 near the head end 32 adjacent to the left 36 and right 38 of the deck 30. The push handles 66 and 68 can be individually moved between the lower storage position (the position shown with respect to the left handle 66 in FIG. 1) and the ascending push position (the position shown with respect to the right handle 68 in FIG. 1). When the push handles 66 and 68 are locked at the push position, the treatment / caregiver can grasp the push handles 66 and 68 and operate the stretcher 20 on the floor 50. When the push handles 66, 68 are placed in the stowed position, the push handles 66, 68 are positioned below and out of the way, allowing the therapist / caregiver to easily access the patient on deck 30. .. As shown in FIG. 7, the push handles 66 and 68 are the handle post 70 that the treatment / caregiver grips when moving the stretcher 20, the pivot post 74 that is rotatably connected to the upper frame 26, and the handle post, respectively. It has a curved stretcher post 72 that connects the 70 to the pivot post 74. As shown in FIG. 7, the handle post 70, the extension post 72, and the pivot post 74 of the push handles 66 and 68 are integrally connected in a meandering shape, respectively. When the push handles 66, 68 are in the push position (the position shown with respect to the right push handle 68 in FIG. 1), the handle post 70 of the push handles 66, 68 is approximately perpendicular to the longitudinal axis 40 of the stretcher 20. It will be postponed. In the illustrated embodiment, extruded hollow tubes having a circular cross section are used as push handles 66, 68 and are manufactured from a hard, strong and lightweight material such as steel or aluminum. U.S. Pat. No. 5,806111 discloses an example of a push handle that is individually movable with respect to the upper frame of the stretcher between the lowered retracted position and the raised push position. The disclosure of US Pat. No. 5,806111 is hereby incorporated herein by reference.
The elevating adjustment mechanism 28 can function to raise, lower, and tilt the upper frame 26 with respect to the lower frame 22. As shown in FIGS. 2 to 3, in the illustrated embodiment, the elevating adjustment mechanism 28 is a hydraulic or hydraulic cylinder 82 at the head end covered with a flexible boot 86 (FIG. 1) and a foot end. It has a hydraulic or hydraulic cylinder 84 of the part. These cylinders 82, 84 are connected to hydraulic or hydraulic pumps 92, 94 supported on the lower frame 22, respectively. A pump pedal 90, a pair of side pedals 96 and 98, and a center pedal 99 supported by the side pedals 96 and 98 are connected to each side of the lower frame 22. In some embodiments, pump pedals similar to pump pedals 90, 96, 98, 99 are also connected to the foot end 34 of the lower frame 22. The pump pedal 90 can function to raise both the cranial end 32 and the foot end 34 of the upper frame 26 simultaneously with respect to the lower frame 22. The side pedal 96 can function to lower the cranial end 32 of the upper frame 26 relative to the foot end 34 of the upper frame 26 (ie Trendelenburg position). The side pedal 98 can function to lower the foot end 34 of the upper frame 26 relative to the cranial end 32 of the upper frame 26 (ie, reverse Trendelenburg position). The central pedal 99 can function with respect to the lower frame 22 to simultaneously lower both the cranial end 32 and the foot end 34 of the upper frame 26.
As shown in FIGS. 2 to 3, the lower frame 22 has a pair of head side end lateral frame members 102 and foot side end lateral frame members 104 extending in the lateral direction. These horizontal frame members 102 and 104 are arranged apart from each other in the longitudinal direction, and extend between the left frame member 106 and the right frame member 108 extending in the longitudinal direction. Right-angle brackets 110 extending outward are connected to the ends of these two lateral frame members 102 and 104. Each caster 24 is connected to each right angle bracket 110. Horizontal plates (not shown) are attached to two left and right frame members 106, 108 near the cranial end 32 to support the cranial end hydraulic or hydraulic cylinder 82 and pump 92. There is. Another lateral plate (not shown) is attached to two left and right frame members 106, 108 near the foot end 34 to support the foot end hydraulic or hydraulic cylinder 84 and the pump 94. Has been done. For example, extruded tubes having a square cross section are used as the horizontal frame members 102 and 104 and the left and right frame members 106 and 108, and are manufactured from hard, strong and lightweight materials such as steel and aluminum. ..
In the illustrated embodiment, the stretcher 20 has a linkage 235 (FIGS. 23) connected to a lower frame 22 to raise and lower the fifth wheel 236 (FIGS. 23), which is a straight wheel. Have. An example of a linkage for raising and lowering a fifth wheel is disclosed in US Pat. No. 5,806111 described above. In the illustrated embodiment, all four casters 24 at each corner of the lower frame 22 are brake casters. Each brake caster 24 has two modes, a neutral mode and a brake mode. In neutral mode, the caster wheels 64 can freely rotate around each vertical axis 420 (Fig. 8) and further freely around each horizontal axis 422 (Fig. 8). On the other hand, in the brake mode, the caster wheels 64 are prevented from freely turning around their respective vertical axes 420 and freely rotating around their respective horizontal axes 422.
In some embodiments, the stretcher 20 does not have a fifth wheel. In such an embodiment, the stretcher may have three brake casters and one brake / straight caster on the left side 36 near the foot end 34. The brake / straight-ahead caster has three modes: a neutral mode, a brake mode, and a straight-ahead mode. In the neutral mode, the caster wheels of the brake / straight casters can freely turn around the vertical axis in the same way as the caster wheels of the brake casters, and can freely rotate around the horizontal axis. In the brake mode, the caster wheels of the brake / straight casters are prevented from freely turning around the vertical axis and freely rotating around the horizontal axis in the same way as the caster wheels of the brake casters. However, in the straight-ahead mode, unlike the caster wheels of a brake caster, the caster wheels of the brake / straight-ahead caster are prevented from freely turning around the vertical axis, but can freely rotate around the horizontal axis.
In the illustrated embodiment of the stretcher 20, the two brake casters 24 near the cranial end 32 are active brake casters, while the two brake casters 24 near the foot end 34 are standard brake casters. .. As shown in FIGS. 8 to 12, each of the active brake casters 24 has a molded brake shoe 448 in addition to the standard brake shoe 450. On the other hand, each standard brake caster 24 has only a standard brake shoe 450. An example of an active brake caster with a molded brake shoe and a standard brake shoe is part number 911819 (2446 XSP 200 R36-32) from Tente Casters, Hebron, Kentucky. An example of a standard brake caster with only standard brake shoes is part number 911801 (2446 XSP 200 R36-32), also manufactured by Tente Casters.
As shown in FIGS. 2 to 6, the stretcher 20 has a caster brake mechanism 100 for preventing the rotation and turning operation of each caster wheel 64. This mechanism 100 has a pair of brakes and straight shafts 130 and 170. The brake / straight shaft 130 extends in the longitudinal direction, while the brake / straight shaft 170 extends in the lateral direction. A pair of brake / straight sphenoid pedals 132, 134 are connected to opposite ends 32, 34 of the brake / straight shaft 130. A pair of brake / straight sphenoid pedals 176, 178 are connected to opposite ends 36, 38 of the brake / straight shaft 170. The movement of the stretcher 20 can be stopped by moving the brake / straight pedals 132, 134, 176, and 178 to the respective brake positions to prevent the rotation and turning operation of each caster wheel 64. From each brake position, move the brake / straight pedals 132, 134, 176, and 178 to their respective straight positions to enable the rotation and turning of each caster wheel 64 so that the straight wheels 236 land on the floor 50. By lowering it to, the stretcher 20 can move freely. From each straight-ahead position, move the brake / straight-ahead pedals 132, 134, 176, and 178 to a neutral position where each caster wheel 64 can freely rotate and turn and the straight-ahead wheel 236 is pulled into an intermediate position separated from the floor 50. , Each can be moved.
The brake / straight shaft 130 is rotatably attached to the left frame member 106 of the lower frame 22 by a plurality of brackets 136 (FIG. 2). The brake / straight shaft 130 extending in the longitudinal direction reacts to the rotation of either one of the butterfly pedals 132 and 134 and rotates in either direction with its own longitudinal axis 129 as an axis. As shown in FIG. 4, a linkage 142 near the head end 32 connects the head end 32 of the brake / straight shaft 130 to the lateral brake rod 152. Each end of the lateral brake rod 152 is rotatably supported by a right angle bracket 110. As shown in FIG. 6, another linkage 144 near the foot side end 34 connects the foot side end 34 of the brake / straight shaft 130 to the lateral brake rod 154. Each end of the lateral brake rod 154 is rotatably supported by a right angle bracket 110. For example, the brake rods 152 and 154 have a hexagonal cross section, but other shapes and configurations of the brake rods 152 and 154 are also within the scope of this disclosure.
As shown in FIG. 3, the lateral brake / straight shaft 170 is laterally rotatably attached to the left and right frame members 106 and 108 near the head end 32 of the lower frame 22 by a pair of collars or brackets 172. ing. The brake / straight shaft 170 extending in the lateral direction responds to the rotation of either one of the butterfly pedals 176 and 178 and rotates in either direction with its own longitudinal axis 169 as an axis. As shown in FIGS. 2 to 3, on the right side 38 of the lower frame 22, the pivot link 174 is rotatably attached to the brake / straight shaft 170 together with the brake / straight shaft 170. Further, on the right side 38 of the lower frame 22, the frame member 180 (FIGS. 2 to 3) that moves in the longitudinal direction is connected to the lower frame 22 so as to be able to translate in the direction parallel to the longitudinal axis 40. The cranial end 32 of the frame member 180 holds the connector 182. The connector 182 has a pair of laterally spaced flanges 184. As shown in FIG. 2, the pivot link 174 is received between the laterally spaced flanges 184 and rotatably connected to it by laterally extending pins 186.
Please continue to refer to Figure 3. When the brake / straight shaft 170 rotates in the braking direction 194 (clockwise when viewed from the right side 38 in FIG. 3), the link 174 also rotates in the braking direction 194, and the frame member 180 is moved to the foot side end 34. Move in the direction indicated by arrow 188 (Fig. 3 and Fig. 6). On the other hand, when the brake / straight shaft 170 rotates in the straight direction 196 (counterclockwise when viewed from the right side 38 in FIG. 3), the link 174 also rotates in the straight direction 196, and the frame member 180 is placed on the head side. Move towards the end 32 in the direction indicated by the arrow 190 (FIGS. 3 and 6). A bracket 192 (FIG. 6) connects the foot end 34 of the frame member 180 to the lateral brake rod 154 on the right side 38 of the lower frame 22 near the foot end 34. In this way, the frame member 180 has its cranial end 32 supported by links 174 (FIGS. 2 to 3) connected to the brake / straight shaft 170, and its foot end 34 is supported by the brake rod 154. It is supported by a bracket 192 (Fig. 6) connected to.
As described above, the linkage 142 connects the head end 32 of the brake / straight shaft 130 to the lateral brake rod 152 supported by the right angle bracket 110 near the head end 32. Referring to FIG. 4, linkage 142 has a connector 200. The connector 200 is rotatably attached to the brake rod 152 together with the brake rod 152 between two right angle brackets 110 connected to the head end lateral frame member 102. The connector 200 has a link 202 extending outward. The link 202 holds the lateral pivot pin 206. The vertically extending connecting rod 208 has its upper end connected to the pivot pin 206 by an eyebolt 210 and its lower end connected to a pair of short flanges 212 spaced in the longitudinal direction. The short flange 212 is rotatably attached to the brake / straight shaft 130 together with the brake / straight shaft 130 near the head end portion 32.
As shown in FIG. 5, the connecting rod 208 has a generally straight upper portion 214 and a bent lower portion 216 that is laterally offset from the center line. The bent lower portion 216 has a slot 218 that extends approximately vertically. The slot 218 has a portion 220 that is inclined downward and extends laterally, a portion 222 that extends upward, and a portion 224 that extends downward. As shown in FIG. 5, the downward extending portion 224 of the bent-shaped slot 218 is laterally displaced with respect to the upward extending portion 222 of the bent-shaped slot 218. The upward facing seat portion 238 is formed at a joint portion between the upward extending portion 222 of the bent-shaped slot 218 and the downward extending portion 224 of the bent-shaped slot 218. A longitudinal pin 226 connected to the flange 212 is located in slot 218.
From the substantially horizontal neutral position shown in FIGS. 2 to 4, the treatment / caregiver pushes down the brake portion 131 of the brake / straight pedal 132, and the brake / straight shaft 130 is used in the braking direction 228 with the longitudinal axis 129 as the axis. Rotate to the brake position (counterclockwise when viewed from the head end 32 in FIG. 4). By rotating the brake / straight shaft 130 in the braking direction 228, the flange 212 also rotates in the braking direction 228. As shown in FIG. 5, when the flange 212 rotates in the braking direction 228, the pin 226 fixed to the flange 212 engages with the downward facing surface 232 of the upward extending slot 222 to raise the connecting rod 208. The upward movement of the connecting rod 208 causes the brake rod 152 to rotate in the braking direction 230 (clockwise when viewed from the right side 38 in FIG. 4). As shown in FIG. 10, due to the rotation of the brake rod 152 in the braking direction 230, a pair of standard brake shoes 450 and a pair of molded brake shoes 448 correspond to each corresponding caster wheel 64 near the head end 32. By moving to engage with, the rotation and turning motions of these caster wheels are prevented.
When the brake / straight shaft 130 rotates to the brake position in the braking direction 228, the longitudinal pin 240 (Fig. 5) attached to the short flange 212 becomes the upward facing seat portion 238 (Fig. 5) of the connecting rod 208. Engage. The brake / straight shaft 130 rotates in the straight direction 234 from the brake position to the neutral position. When the brake / straight shaft 130 rotates in the straight direction 234 to its neutral position, the longitudinal pin 240 pushes down the downward facing seat portion 238 to connect the connecting rod 208 and the brake rod 152 connected to the connecting rod 208. And move to each neutral position shown in Fig. 5. In this way, the longitudinal pin 240 can prevent the connecting rod 208 from being trapped in its raised position.
On the other hand, the treatment / caregiver pushes down the straight portion 133 (Fig. 4) of the brake / straight pedal 132 from the neutral position, and pushes the brake / straight shaft 130 straight along the longitudinal axis 129 (FIG. 4). Rotate to the straight-ahead position in the clockwise direction when viewed from the cranial end 32). The rotation of the brake / straight shaft 130 in the straight direction 234 causes the linkage 235 (Fig. 2) to move the straight wheel 236 (Fig. 2) so as to land on the floor 50. Further, as shown in FIG. 4, when the brake / straight shaft 130 rotates in the straight direction 234, the flange 212 rotates in the straight direction 234. As the flange 212 rotates in the straight direction 234, the pin 226 first moves downwards in the upward extension slot 222, then outwards in the slot 220, and then downwards in the downward extension slot 224. It will move in the direction.
As described above, the linkage 144 connects the foot side end 34 of the brake / straight shaft 130 to the lateral brake rod 154 supported by the right angle bracket 110 near the foot side end 34. Referring to FIG. 6, the foot side end linkage 144 has a connector 250. The connecting body 250 is rotatably attached to the brake rod 154 together with the brake rod 154 between two right-angled brackets 110 connected to the foot side end lateral frame member 104. The connector 250 has an outwardly extending link 252. Link 252 holds lateral pivot pin 256. A pair of short flanges 262 separated in the longitudinal direction are rotatably fixed to the brake / straight shaft 130 together with the brake / straight shaft 130 near the foot side end 34. The longitudinal pivot pin 276 is connected to the short flange 262. The upper end of the connecting rod 258 is connected to the pivot pin 256 by an eyebolt similar to the eyebolt 210, and the lower end is connected to the pivot pin 276 by another eyebolt 264.
From the substantially horizontal neutral position shown in FIG. 6, the treatment / caregiver pushes down the brake portion 131 of the brake / straight pedal 134, and the brake / straight shaft 130 is 228 in the braking direction around its longitudinal axis 129 (FIG. 6). Rotate to the brake position in the clockwise direction when viewed from the foot side end 34 of the. The rotation of the brake / straight shaft 130 in the braking direction 228 causes the short flange 262 to rotate in the braking direction 228 as well. When the short flange 262 rotates in the braking direction 228, the pin 276 fixed to the short flange 262 pushes up the connecting rod 258. When the connecting rod 258 moves upward, the brake rod 154 rotates in the braking direction 280 (counterclockwise when viewed from the right side 38 in FIG. 6). Rotation of the brake rod 154 in the braking direction 280 causes a pair of standard brake shoes 450 (as shown in FIG. 10 for the active brake caster 24) to engage their respective corresponding caster wheels 64 near the foot end 34. These caster wheels are prevented from rotating and turning. On the other hand, the treatment / caregiver pushes down the straight portion 133 of the brake / straight pedal 134 from the neutral position, and the brake / straight shaft 130 is used in the straight direction 234 with the longitudinal axis 129 as the axis (foot side end in FIG. 6). Rotate to the straight-ahead position (counterclockwise when viewed from 34). As described above, when the brake / straight shaft 130 rotates in the straight direction 234, the straight wheel 236 (FIG. 2) moves so as to land on the floor 50.
As shown in FIG. 3, when the brake / straight shaft 170 rotates in the braking direction 194, the frame member 180 moves in the direction of 188 toward the foot side end 34. When the frame member 180 moves toward the foot end 34 in the direction of 188, the bracket 192 attached to the brake rod 154 rotates in the braking direction 280 (counterclockwise when viewed from the right side 38 in FIG. 6). Will be. Rotation of the brake rod 154 in the braking direction 280 causes the standard brake shoe 450 (as shown in FIG. 10 for the active brake caster 24) to engage each corresponding caster wheel 64 near the foot end 34. The rotation and turning motion of these caster wheels is prevented. As described above, the brake caster 24 near the foot side end 34 has a standard brake shoe 450. On the other hand, the brake caster 24 near the head end 32 also has a molded brake shoe 448 in addition to the standard brake shoe 450.
Further, as shown in FIG. 6, the rotation of the brake rod 154 in the braking direction 280 causes the coupling 250 attached to the brake rod 154 to rotate in the braking direction 280. When the connecting body 250 rotates in the braking direction 280, the brake / straight shaft 130 rotates in the braking direction 228. When the brake / straight shaft 130 rotates in the braking direction 228, the brake rod 152 near the head end 32 rotates in the braking direction 230. As shown in FIG. 10, due to the rotation of the brake rod 152 in the braking direction 230, two standard brake shoes 450 and two molded brake shoes 448 correspond to each corresponding caster wheel 64 near the head end 32. By moving to engage with, the rotation and turning motions of these caster wheels are prevented. Further, when the brake / straight shaft 130 rotates in the brake direction 228, the brake / straight pedals 132 and 134 rotate in the brake direction 228.
On the other hand, as shown in FIG. 3, when the brake / straight shaft 170 rotates in the straight direction 196, the frame member 180 moves toward the head end 32 in the direction indicated by the arrow 190. When the frame member 180 moves toward the head end portion 32, the bracket 192 attached to the brake rod 154 rotates in the straight-ahead direction 282 (clockwise when viewed from the right side 38 in FIG. 6). When the bracket 192 rotates in the straight direction 282, the brake rod 154 rotates in the straight direction 282. The rotation of the brake rod 154 in the straight direction 282 causes the coupling 250 attached to the brake rod 154 to rotate in the straight direction 282. When the connector 250 rotates in the straight direction 282, the brake / straight shaft 130 rotates in the straight direction 234. The rotation of the brake / straight shaft 130 in the straight direction 234 causes the straight wheel 236 (Fig. 2) to move so as to land on the floor 50. Further, when the brake / straight shaft 130 rotates in the straight direction 234, the brake / straight pedals 132 and 134 rotate in the straight direction 234.
In this way, when the brake / straight pedals 176 and 178 rotate in the braking direction 194 to their respective brake positions, the brake / straight pedals 132 and 134 also rotate in the braking direction 228 to their respective brake positions. On the other hand, when the brake / straight pedals 176 and 178 rotate in the straight direction 196 to their respective straight positions, the brake / straight pedals 132 and 134 also rotate in the straight direction 234 to their respective straight positions. On the contrary, when the brake / straight pedals 132 and 134 rotate in the braking direction 228 to their respective brake positions, the brake / straight pedals 176 and 178 also rotate in the braking direction 194 to their respective brake positions. On the other hand, when the brake / straight pedals 132 and 134 rotate in the straight direction 234 to their respective straight positions, the brake / straight pedals 176 and 178 also rotate in the straight direction 196 to their respective straight positions.
That is, the foot pedals 132 and 134 at the ends 32 and 34 of the lower frame 22 are relative to the lateral axis 169 on which the foot pedals 176 and 178 at the sides 36 and 38 of the lower frame 22 are the axes of their operation. It is possible to operate around the longitudinal axis 129, which is vertical, and the linkage that connects the foot pedals 132, 134 and the foot pedals 176, 178 to each other (for example, pivot link 174, longitudinal moving member 180, Brackets 192, brake rods 154, linkage 144, etc.) can function to move foot pedals 132, 134 in response to any one of the foot pedals 176, 178, and also the foot. When any one of the pedals 132 and 134 is operated, it can function to move the foot pedals 176 and 178 in response.
The caster brake mechanism 100 has a cam 290. The cam 290 is attached to each end of each of the brake rods 152 and 154, as shown in FIG. Note that FIG. 8 relates to the brake rod 152 near the head end portion 32. The cam 290 has three notches 292, 294 and 296 (Fig. 12). These three notches correspond to the three angular positions of the cam 290 corresponding to the brake / neutral and straight positions of the brake / straight pedals 132, 134, 176 and 178. The plunger 430 is spring-loaded by a compression spring 436 so that it points upward toward the cam 290 in the direction of 434. The spring-loaded plunger 430 has an upward facing tip 442. The upward facing tip 442 accepts one of the three downward facing notches 292, 294, 296 of the cam 290 depending on whether the brake rod 152 is in the brake position, the neutral position, or the straight forward position. It is configured to be. The spring 436 is kept compressed between the collar 438 held by the plunger 430 and the plunger housing 424 held by the stem 60 of the casters 24.
When the brake / straight pedals 132, 134, 176, 178 are in their respective neutral positions, the tip 442 of each plunger 430 is the corresponding cam 290 attached to the brake rods 152, 154, as shown in FIG. It is accepted in the central notch 294 of. Note that FIG. 8 relates to casters 24 near the cranial end 32 on the right side 38 of the stretcher 20. Brake Rotate the straight pedals 132, 134, 176, 178 from each neutral position to each brake position, and move the brake rods 152, 154 to each brake direction 230 (Fig. 4), 280 (Fig. 6). Can be rotated 45 °. When the brake rods 152 and 154 rotate in the braking directions 230 and 280 for about 45 °, the cam 290 also rotates in the braking directions 230 and 280 for about 45 °. As the cam 290 rotates about 45 ° in each braking direction 230, 280, the tip 442 of each plunger 430 engages the notch 292 of the corresponding cam 290, as shown in FIG. 10, and the brake rod 152, The positions of 154 and brake pedals 132, 134, 176 and 178 are held at their respective brake positions. Note that FIG. 10 relates to casters 24 near the cranial end 32 on the right side 38 of the stretcher 20.
Also, as shown in FIG. 10, the rotation of the cam 290 in the braking directions 230 and 280 over about 45 ° causes the edge 298 of the cam 290 (FIG. 12) to move the plunger 430 downward as indicated by the arrow 454. It now pushes down and all four standard brake shoes 450, in addition to the two molded brake shoes 448 near the cranial end 32, engage the corresponding caster wheels 64 of these caster wheels. Rotation and turning movements are blocked. On the other hand, the brake / straight pedals 132, 134, 176, and 178 are rotated from the neutral positions to the straight positions, and the brake rods 152 and 154 are rotated in the straight directions 242 (Fig. 4) and 282 (Fig. 6). ) Can be rotated about 45 °. When the brake rods 152 and 154 rotate in the straight directions 242 and 282 for about 45 °, the cam 290 also rotates in the straight directions 242 and 282 for about 45 °. As the cam 290 rotates about 45 ° in each straight direction 242, 282, the tip 442 of each plunger 430 engages the notch 296 of the corresponding cam 290, with the brake rods 152, 154 and brake pedals 132, 134. , 176, 178 positions are held in their respective straight-ahead positions.
As described above, the left and right push handles 66 and 68 are connected to the upper frame 26 near the head end 32 so as to be movable between the raised push position and the lowered storage position. The push handle 66 is located on the left side 36 of the upper frame 26, while the push handle 68 is located on the right side 38 of the upper frame 26. When the push handles 66, 68 are locked in their respective raised positions, the handle posts 70 of the push handles 66, 68 extend laterally, for example, as shown in FIG. 1 and FIG. 7 relating to the push handle 68. The push handles 66, 68 now extend inward of the upward extension 76 of the corresponding extension post 72, approximately perpendicular to the longitudinal axis 40 of the stretcher 20. As a result, the treatment / caregiver can operate the stretcher 20 on the floor 50 by grasping the handle posts 70 of the two push handles 66 and 68.
The stretcher 20 has a caster brake device 300 that is operated by hand, as shown in FIGS. 4 and 7. The device 300 has a brake handle 302. The brake handle 302 is connected to the handle post 70, which is one of the push handles 66 and 68. In the illustrated embodiment, the brake handle 302 is connected to a push handle 68, which is a push handle on the right side of the treatment / caregiver standing near the cranial end 32 of the stretcher 20. The brake handle 302 is rotatably attached to the mounting bracket 304 by a screw 306 so that it can rotate around the rotating shaft 308. The mounting bracket 304 is secured to the handle post 70 of the push handle 68 by a screw 310. When the brake handle 302 is attached to the handle post 70 of the push handle 68, the rotating shaft 308 extends approximately perpendicular to the upper frame 26 and the brake handle 302 extends approximately laterally, as shown in FIG. It extends to the outside.
For example, as shown in FIG. 7, the brake handle 302 of the push handle 68, the mounting bracket 304, the handle post 70 and the upward extension 76 are all soft to provide a comfortable grip and facilitate cleaning. Wrapped in a sleeve or cover 312. The ends of this assembly are closed by an end cap 314. In the illustrated embodiment, the end cap 314 has a two-part clam shell structure with an upper shell or upper half 316 and a bottom shell or bottom half 318. In the illustrated embodiment, the brake handle 302 and the mounting bracket 304 are made of a hard, strong and lightweight material such as steel or aluminum. The end cap 314 is made of a hard, strong and lightweight plastic material. The sleeve 312 is made of rubber or plastic. In some embodiments, the brake handle 302 of the push handle 68, the mounting bracket 304, the handle post 70 and the upward extension 76 are dip molded to provide a suitable soft cover.
As shown in FIG. 7, the brake handle 302 has a hub portion 320, a grip portion 322, and a leg portion 324. When the brake handle 302 is attached to the handle post 70, the grip portion 322 extends outward in the lateral direction with respect to the hub portion 320, and the leg portion 324 extends outward in the longitudinal direction. In the illustrated embodiment, the angle formed between the grip portion 322 and the leg portion 324 is an obtuse angle (about 100 °). In one embodiment, the angle formed between the grip portion 322 and the leg portion 324 is about 90 °. In yet another embodiment, the angle formed between the grip portion 322 and the leg portion 324 is less than 90 °.
As mentioned above, the end cap 314 includes a top shell 316 and a bottom shell 318. The top shell 316 and the bottom shell 318 each have a substantially rectangular shape when viewed in plan view. The upper shell 316 and the bottom shell 318 are, for example, roughly mirror images of each other. Shells 316 and 318 have a plurality of reinforcing ribs (not shown) and a pair of mounting posts 326 and 328, respectively. Reinforcing ribs and mounting posts 326 and 328 form a cavity 332 for receiving the hub portion 320 and leg portion 324 of the brake handle 302, and the grip portion 322 of the brake handle 302 projects laterally outward. A generally flat surface is defined inwardly spaced from a generally flat surface defined by the edge portions 330 of the shells 316, 318 so that an opening 334 for the shell is formed. The mounting post 328 of the upper shell 316 has a large through opening 336. The mounting post 328 of the bottom shell 318 has a screw insertion stop opening 338.
Please continue to refer to Figure 7. The mounting bracket 304 has a tubular cylinder 340 and a pair of spaced flanges 342. The flange 342 extends outward from the cylinder 340 in a direction substantially perpendicular to the longitudinal axis of the cylinder 340. The outer diameter of the cylinder 340 is slightly smaller than the inner diameter of the tubular handle post 70 of the push handle 68. To secure the mounting bracket 304 to the handle post 70, insert the cylindrical body 340 of the bracket 304 into the tubular handle post 70. Then, the screw 310 is inserted into the large opening 344 of the handle post 70 and penetrated, and is screwed into the screw insertion opening 346 of the mounting bracket 304. When the mounting bracket 304 is installed, the separated flange 342 extends horizontally from the cylinder 340 toward the foot end 34 of the stretcher 20.
In order to secure the brake handle 302 to the mounting bracket 304, the hub portion 320 and the leg portion 324 of the brake handle 302 are placed between the separated flanges 342. Then screw 306, the large opening 336 of the mounting post 328 of the upper shell 316, the first washer 348, the large opening 350 of the upper flange 342, the large opening 352 of the hub portion 320 of the brake handle 302, and the bottom flange. Insert through the large opening 350 of 342 and the second washer 348. The screw 306 is then screwed into the screw insertion opening 338 of the mounting post 328 of the bottom shell 318. When the brake handle 302 is installed, the hub portion 320 and leg portion 324 of the brake handle 302 are substantially within the area of the separated flange 342 of the mounting bracket 304 so as not to adversely affect the movement of the brake handle 302. Will be located. When the brake handle 302 is installed, the upper shell 316 houses the hub 320 and the upper half of the leg 324 of the brake handle 302, and the bottom shell 318 houses the hub 320 and the lower half of the leg 324 of the brake handle 302. Will be.
In the illustrated embodiment, the brake handle 302 is rotatably attached to the mounting bracket 304, and the screws 306 and 310 are used to fix the mounting bracket 304 to the handle post 70. Appropriate fasteners such as dowel pins, rivets, nut and bolt combinations, etc. may be used to rotatably attach the brake handle 302 to the mounting bracket 304 and secure the mounting bracket 304 to the handle post 70. .. Also, in the illustrated embodiment, the mounting bracket 304 is used to rotatably attach the brake handle 302 to the handle post 70, but instead a single right angle flange and the brake handle 302 to the handle post 70. It may be used for rotatable mounting.
As shown in FIG. 7, in the illustrated embodiment, the caster brake device 300 has a Bowden cable 370. The Bowden cable 370 has a sheath 372 and an elongated wire 374 slidably received by the sheath 372. The first end 376 (FIG. 7) of the wire 374 is connected to the leg portion 324 of the brake handle 302, and the second end 378 (FIG. 4) of the wire 374 is the brake rod 152 near the cranial end 32. It is connected to a lever 380 that is rotatably attached to the brake rod 152. The leg portion 324 of the brake handle 302 has an opening 382 extending upward near its distal end. A small cylinder 384 is attached to the first end 376 of the wire 374. The diameter of the cylinder 384 is larger than the diameter of the opening 382. The wire 374 is passed through the opening 382 via an outward opening slot that communicates with the opening 382. The tensioned wire 374 attracts the cylinder 384 to the annular lip of the opening 382, fixing the first end 376 of the wire 374 to the leg portion 324 of the brake handle 302. The sheath 372 is attached to the mounting bracket 304 at an appropriate position.
As shown in FIG. 4, the lever 380 attached to the brake rod 152 has an opening 392 near its distal end. A small cylinder similar to the cylinder 384 is attached to the second end 378 of the wire 374. The diameter of this cylinder attached to the second end 378 of the wire 374 is greater than the width of the opening 392. The wire 374 is passed through the opening 392 via an outward opening slot 396 that communicates with the opening 392. The tensioned wire 374 attracts the cylinder to the annular lip of the opening 392, anchoring the second end 378 of the wire 374 to a lever 380 rotatably attached to the brake rod 152 along with the brake rod 152. .. The sheath 372 is attached to the upward extending flange 398 of the bracket 400. The bracket 400 is attached to the upward facing surface 402 of the lateral lateral rail 102 of the lower frame 22 near the head end portion 32. Bracket 400 has two laterally spaced lateral plates 404 on opposite sides 36, 38 of the upward extending flange 398.
The cable 370 is connected to the leg portion 324 (FIG. 7) of the brake handle 302, then through the internal area of the handle post 70, through the bend 78 (FIG. 7) of the push handle 68, and the bottom portion 80. Remove from push handle 68 through (Fig. 7). After pulling out the cable 370 from the bottom 80 of the push handle 68 near the cranial end 32 on the right side 38 of the stretcher 20, advance it inward along the upper frame 26 and liquid near the cranial end 32. It travels downward along the pressure or hydraulic cylinder 82 and then outward along the lower frame 22 to reach the lever 380 attached to the brake rod 152 near the cranial end 32.
As shown in FIG. 1, the brake handle 302 allows the treatment / caregiver to pull the wire 374 in the direction indicated by the arrow 406 (FIG. 4) to bring the lever 380 and the brake rod 152 connected to the lever 380 up to about 28 °. Sufficiently on the handle post 70 so that the handle post 70 and the grip portion 322 of the brake handle 302 can be gripped at the same time to squeeze the grip portion 322 in order to rotate in the braking direction 230 over the angle of. It is located in close proximity. By rotating the brake rod 152 in the braking direction 230 over an angle close to about 28 °, two molded brake shoes 448 are placed on their respective corresponding casters near the cranial end 32, as shown in FIG. The rotation of these caster wheels is controlled by moving them so as to engage with the wheels 64, but since the two standard brake shoes 450 are not engaged with the caster wheels, the rotation of the caster wheels is not stopped. In the illustrated embodiment, the magnitude of the force that a typical caregiver can apply to the brake handle 302 does not allow the brake rod 152 to rotate more than about 28 ° even when the brake handle 302 is activated. It is not possible.
However, when the brake / straight pedals 132, 134, 176, and 178 are rotated to their respective brake positions, the brake rods 152 and 154 rotate in the respective braking directions 230 and 280 for about 45 °, and Fig. 10 As shown in, in addition to the two molded brake shoes 448 near the cranial end 32, all four standard brake shoes 450 correspond to each with sufficient force to stop the rotation of the caster wheels 64. Move so that it engages with the caster wheel 64. In addition, by rotating the brake / straight pedals 132, 134, 176, and 178 to their respective brake positions, the tip 442 of each plunger 430 becomes the notch 292 of the corresponding cam 290 attached to the brake rods 152, 154. Once engaged, the brake rods 152, 154 and the brake pedals 132, 134, 176, 178 connected to the brake rods are held at their respective brake positions.
On the other hand, when the brake handle 302 is actuated, the brake rod 152 at the cranial end only rotates over an angle of up to about 28 °. For rotation of the brake rod 152 over an angle close to approximately 28 °, as shown in FIG. 9, only two molded brake shoes 448 were engaged with their respective corresponding caster wheels 64 near the cranial end 32, 2 Two standard brake shoes 450 are not engaged. The force associated with this is sufficient to control the rotation of the caster wheels, but not large enough to stop the rotation. Also, if the brake rod 152 rotates over an angle of up to about 28 °, the cam 290 attached to the brake rod 152 will also rotate over an angle of up to about 28 °, which is the case with each plunger 430. The tip 442 is not rotated enough to engage the notch 292 of each cam 290 attached to the brake rod 152. The plunger 430 is spring-loaded to point upwards, and the cam 290 attached to the brake rod 152 is urged to return the brake rod 152 to its neutral position when the brake handle 302 is released. Is adding power to. When the brake rod 152 returns to its home position, that is, the neutral position, the grip portion 322 of the brake handle 302 also returns to its home position. In some embodiments, additional springs, such as torsion springs, may be provided to urge the brake handle 302 to return to its extended position.
As shown in FIG. 4, when the brake rod 152 rotates in the brake direction 230 in response to the operation of the brake handle 302, the connector 200 attached to the brake rod 152 also rotates in the brake direction 230. When the connecting body 200 rotates in the braking direction 230, the connecting rod 280 moves upward. As shown in FIG. 5, the pin 226 attached to the flange 212 held by the brake / straight shaft 130 is sufficiently separated from the upward facing surface 244 of the upward extending slot 222 and is a connecting rod. The 208 can move upward in response to the rotation of the brake rod 152 when the brake handle 302 is operated without causing the rotation of the brake / straight shaft 130. Since the brake / straight shaft 130 does not rotate even when the brake handle 302 is operated, the brake rod 154 near the foot side end 34, the brake / straight shaft 170, and the brake pedals 132, 134, 176, 178 are also Similarly, it does not rotate in response to the operation of the brake handle 302.
As shown in FIGS. 8 to 12, the cam 290 is attached to the brake rod 152. The cam 290 has three notches 292, 294 and 296. These three notches correspond to the three angular positions of the cam 290 corresponding to the brake / neutral and straight positions of the brake / straight pedals 132, 134, 176 and 178. The casters 24 are held by the stem 60 and the yoke 62 which is rotatably held by the stem 60 so as to be able to rotate around the shaft 420 which is substantially vertical, and by the yoke 62 which is rotatably held by the shaft 422 (FIG. 1) which is almost horizontal. It has a caster wheel 64 that has been used. The stem 60 of the caster 24 is fixed to the right angle bracket 110 (FIG. 2) of the lower frame 22. Stem 60 has a plunger housing 424. The yoke 62 is mounted so that it can be swiveled with respect to the plunger housing 424 via a bearing 426. The bearing 426 has an inner ring connected to the plunger housing 424 and an outer ring connected to the yoke 62 via the bearing housing 428. Depending on the embodiment, the yoke 62 may not rotate with respect to the stem 60 about the vertical axis 420.
The plunger 430 is supported by the plunger housing 424 so that it can reciprocate along the vertical axis 420 in both opposite directions indicated by the bidirectional arrow 432. The plunger 430 can move freely in the vertical direction, but cannot rotate with respect to the plunger housing 424. The plunger 430 is spring-loaded by a compression spring 436 so as to move upward toward the cam 290 in the direction of 434. The compression spring 436 is kept in a compressed state between the collar 438 fixed to the plunger 430 and the annular seat portion 440 defined by the plunger housing 424. The spring-loaded plunger 430 has a tip 442. The tip 442 has three cams 290, depending on whether the brake rod 152 is in its brake position (FIG. 10), in its neutral position (FIG. 8), or in its straight-ahead position (not shown). It is configured to be accepted by one of the notches 292, 294, 296.
An annular plate 444 is connected to the plunger 430 and has a plurality of downward facing teeth 446 around its outer circumference. The molded brake shoe 448 is supported by a plunger 430 so that it can move along the vertical axis 420. Further, the molded brake shoe 448 is rotatable with respect to the plunger 430 about the vertical axis 420. A retainer 452 fixed to the plunger 430 prevents the molded brake shoe 448 from falling off. The molded brake shoe 448 is spring-loaded by a compression spring 456 so as to move downward toward the holder 452 in the direction of 454. The compression spring 456 is kept in a compressed state between the annular plate 444 and the annular seat portion 458 defined by the molded brake shoe 448. The standard brake shoe 450 is secured to the lower end of the plunger 430 by screws or studs 460 (FIG. 11). In this way, the casters 24 are arranged so that they can move freely with respect to the plunger 430 (rotatable and translateable), and a standard brake shoe 450 fixed to the plunger 430. And have.
When the brake rod 152 is in the neutral position as shown in FIG. 8, the plunger tip 442 is received by the notch 294 and both the brake shoes 448 and 450 are in a position separated from the tread 462 of the caster wheel 64. When the brake handle 302 is squeezed, the brake rod 152 and the cam 290 connected to the brake rod 152 rotate in the braking direction 230 over an angle of up to 28 °. When the cam 290 rotates in the braking direction 230, the plunger 430 and the annular plate 444 connected to the plunger 430 are pushed down by the cam 290. As the annular plate 444 moves downward, the urging of the compression spring 456 causes the molded brake shoe 448 to engage the tread 462 of the caster wheel 64, as shown in FIG. When the brake rod 152 and the cam 290 connected to the brake rod 152 rotate over an angle close to about 28 ° (for example, 24 °), the molded brake shoe 448 of the caster wheel 64, as shown in FIG. Begins to engage with tread 462.
As the plunger 430 moves further downward, the downward movement of the molded brake shoe 448 pressed against the tread 462 by the compression spring 456 stops, while the retainer 452 fixed to the plunger 430 is as shown in FIG. Continue to move downwards. Further rotation of the cam 290 causes the compression spring 456 to be further deformed, which increases the force applied to the tread 462 by the molded brake shoe 448. In this way, the compression spring 456 adds to the tread 462 during at least part of the rotation of the cam 290 so that the user can control the rotational speed of the caster wheel 64 by varying the force applied to the caster wheel 64. The braking force that is applied increases. The rotation of the two caster wheels 64 near the head end 32 is controlled by the operation of the brake handle 302, but the force applied by the molded brake shoe 448 is not large enough to stop the rotation of the caster wheels 64. The magnitude of the force applied to the brake handle 302 by a general caregiver cannot rotate the brake rod 152 more than about 28 °. In the state shown in FIG. 9, the caster wheel 64 can freely rotate around the vertical axis 420, and the molded brake shoe 448 pressed against the tread 462 by the compression spring 456 rotates around the vertical axis 420 together with the caster wheel 64. To do.
However, as shown in FIG. 10, when the brake rod 152 and the cam 290 connected to the brake rod 152 rotate in the braking direction 230 for about 45 °, the plunger 430 becomes a standard type in addition to the molded brake shoe 448. The brake shoe 450 is also engaged with the tread 462 of the caster wheel 64, and sufficient force is applied to stop the rotation of the caster wheel 64. In addition, some of the teeth 446 of the annular plate 444 are received in the respective corresponding holes of the plate 464 held by the yoke 62 to prevent the caster wheel 64 from turning about the vertical axis 420. become. When the brake rod 152 and the cam 290 connected to the brake rod 152 rotate in the braking direction 230 at an angle of about 45 °, each plunger tip 442 notches the corresponding cam 290, as shown in FIG. Entering 292, the plunger 430, the brake rods 152 and 154, the brake / straight shafts 130 and 170, and the brake pedals 132, 134, 176 and 178 are held at their respective brake positions.
As shown in FIG. 11, each of the molded brake shoes 448 has an annular body portion 470 and a pair of curved wheel engaging flange portions 472 extending downward from the annular body portion 470 on opposite sides of the tread 462. doing. As the plunger 430 descends, the wheel engagement flange portion 472 of the brake shoe 448 engages the non-floor surface 474 of the caster wheels 64 on opposite sides of the tread 462. In some embodiments, the fully actuated plunger 430 causes the brake shoes 448 and 450 to engage the caster wheels 64, but the plates do not prevent the caster wheels 64 from turning around the vertical axis 420. The 444 teeth 446 may be omitted. Further, depending on the embodiment, the yoke 62 may be fixed to the stem 60 so that the caster wheel 64 cannot turn around the vertical axis 420.
A hand-operated caster brake device 300, including a brake handle 302 that is squeezed by the caregiver / caregiver to control the rotation of these caster wheels 64 by moving the brake shoes 448 to contact the caster wheels 64 at the cranial end. By equipping the stretcher 20, the treatment / caregiver slows the stretcher 20 moving over the floor, allowing any object carried by the stretcher 20, such as the patient and / or device, to move forward. It is also possible to slow down the speed. Such slowing down may be desirable, for example, when pushing a stretcher from one corridor to another to turn a corner, or when pushing a stretcher down a ramp in a medical facility. When carrying an obese patient on a stretcher 20, especially when pushing the stretcher 20 down the talap while carrying an obese patient, the stretcher uses a caster brake device 300 that is manually operated by the therapist / caregiver. The ability to slow down is a significant improvement over well-known prior art stretchers. As a practical effect, the stretcher 20 is equipped with a device 300 for slowing down the stretcher 20 during transfer, which is required to transport patients to each location, including obese patients, in medical facilities. It is possible to reduce the number of treatment / caregivers compared to the case without the device 300. This effect is particularly great when a ramp is waiting on the transfer route.
Although the plunger type caster brake mechanism has been disclosed above, it is also within the scope of this disclosure to use a push handle handbrake to operate other types of casters or wheel brake mechanisms. Examples of such other types of caster or wheel braking mechanisms include mechanisms having a ring that engages a wheel tread, such as those disclosed in US Pat. Nos. 6,264,006, 6951034, 6460205, etc., such as the US Patent. Examples include a mechanism having a brake member that engages with a wheel hub as disclosed in Nos. 6685775, 5456336, 5343988, 5139116, etc. Further, for example, US Pat. Nos. 5046748, 4076266 disclose. Also included in this example are casters or wheel braking mechanisms having other types of structures that engage such wheels. Further, a hand-operated caster braking mechanism of the type disclosed herein, or an alternative hand-operated caster or wheel braking mechanism listed above, instead of braking the caster wheels or braking the caster wheels. In addition to doing so, it may be used to brake the fifth or straight wheel (sometimes referred to as the auxiliary or central wheel). The fifth wheel or the straight-ahead wheel includes a straight-ahead wheel that moves up and down so as to reach or leave the floor, and also includes a patient support device having two or more straight-ahead wheels. The disclosures of US Pat. Nos. 6264006, 6951034, 6460205, 6685775, 5456336, 5343988, 5139116, 5046748, 4076266 are incorporated herein by reference.
As described above, the elevating adjustment mechanism 28 can function to raise, lower, and tilt the upper frame 26 with respect to the lower frame 22. As shown in FIGS. 2 to 3, the elevating adjustment mechanism 28 has a hydraulic pressure or hydraulic cylinder 82 at the head end and a hydraulic or hydraulic cylinder 84 at the foot end. The cylinders 82 and 84 are connected to hydraulic or hydraulic pumps 92 and 94 supported on the lower frame 22, respectively. As shown in FIGS. 2 to 3 and 13 to 15, on each side of the lower frame 22, a pump pedal 90, a pair of side pedals 96 and 98, and a central pedal supported by the side pedals 96 and 98. It is connected with 99. The pump pedal 90 can function to raise the upper frame 26 relative to the lower frame 22. The side pedal 96 (or sometimes referred to as the cranial end pressure release pedal) can function to lower the cranial end 32 of the upper frame 26 relative to the foot end 34 of the upper frame 26 (Tren). Delenburg position). The side pedal 98 (or sometimes referred to as the foot pressure release pedal) can function to lower the foot end 34 of the upper frame 26 relative to the cranial end 32 of the upper frame 26 (reverse). Trenderenburg position). The central pedal 99 can function with respect to the lower frame 22 to simultaneously lower both the cranial end 32 and the foot end 34 of the upper frame 26. As will be described below, the center pedal 99 is held by the side pedals 96, 98 and is arranged so as to float on the side pedals 96, 98 without directly contacting the lower frame 22. That is, the center pedal 99 is supported by the side pedals 96, 98 supported by the lower frame 22. With this arrangement, both the cranial end 32 and the foot end 34 of the upper frame 26 can be lowered at the same time, or either the cranial end 32 or the foot end 34 of the upper frame 26 can be lowered individually. It is also possible to make it.
As shown in FIGS. 2 to 3, the bar 510 reciprocating and attached so as to extend in the longitudinal direction can reciprocate in both opposite directions indicated by the bidirectional arrow 516 (FIG. 3). It is connected to the side frame member 108 at the right side 38 of the frame 22. The cranial end 32 of the reciprocatingly mounted bar 510 is connected to a pump rod 512 (schematically shown in FIG. 18) of the cranial end hydraulic or hydraulic pump 92. The pump rod 512 is spring-loaded by a compression spring 514 (schematically shown in FIG. 18) toward the cranial end 32. The foot side end 34 of the bar 510 reciprocating mounted is connected to the foot side end hydraulic pressure or the pump rod of the hydraulic pump 94 similar to the pump rod 512 of the head side end hydraulic pump 92. ing. The pump rod 512 of the foot side end hydraulic pressure or hydraulic pump 94 is spring-loaded so as to be directed toward the head side end 32 by a compression spring similar to the compression spring 514 of the head end pump rod 512. Linkage 518 (FIGS. 13-15) reciprocates the two pump pedals 90 so that the bar 510 reciprocates horizontally as one of the two pump pedals 90 reciprocates vertically. It is connected to a bar 510 that is attached as possible. An example of such linkage is disclosed in US Pat. No. 6,421,854. The disclosure of this patent is thereby incorporated herein by reference.
As shown in FIGS. 1 to 3 and 13 to 15, each pump pedal 90 is spring-loaded so as to return to a substantially horizontal raised position and be directed upward by a spring 526. The treatment / caregiver pushes down the pump pedal 90 from this raised position, and the reciprocatingly attached bar 510 moves in the direction of 524 (Fig. 18) toward the foot end 34 of the stretcher 20. Can be done. The bar 510 allows each pump rod 512 at the head / foot end to move in the direction of 524 toward the foot end 34. After that, the treatment / caregiver removes the pressure applied on the pump pedal 90, and by the action of the spring 514 connected to the pump rod 512, each pump rod 512 is placed at each start position or fixed position near the cranial end 32. Can be turned back to. The pump pedal 90 and the reciprocatingly attached bar 510 connected to the pump pedal 90 return to their respective start positions or fixed positions by the action of the return spring 526. The treatment / caregiver repeatedly depresses the pump pedal 90 to trigger the reciprocating motion of the bar 510. The reciprocating motion of the bar 510 causes the reciprocating motion of the pump rod 512. The reciprocating motion of the pump rod 512 causes the pumps 92 and 94 to pump fluid into their respective corresponding hydraulic or hydraulic cylinders 82 and 84, which causes the upper frame 26 to rise.
As schematically shown in FIG. 18 with respect to the cranial end hydraulic pressure or hydraulic pump 92, the cephalopod end hydraulic or hydraulic pumps 92, 94 each have a pressure release pin or button 520. Each pressure release pin 520 at the cephalopod end is spring-loaded by each compression spring 522 toward the cephalopod 32, as schematically shown in FIG. When one of the two head side end side pedals 96 is pushed down (the left side pedal 96 is pushed down in FIG. 14), the first linkage 530 shown in FIGS. 13 to 16 becomes the head side end. The head end pressure release pin 520 is actuated to release the hydraulic pressure or the pressure in the hydraulic cylinder 82, thereby lowering the head end 32 of the upper frame 26. When the pressure applied to the cranial end side pedal 96 is removed, the descent of the cranial end 32 of the upper frame 26 stops. Similarly, when one of the two foot side end side pedals 98 is pushed down, the second linkage 630 shown in FIGS. 13 to 16 releases the foot side end hydraulic pressure or the pressure in the hydraulic cylinder 84. In this way, the foot side end pressure release pin 520 is operated so as to lower the foot side end 34 of the upper frame 26. When the pressure applied to the foot side end side pedal 98 is removed, the foot side end 34 of the upper frame 26 stops descending. On the other hand, when one of the two center pedals 99 is pushed down (the left center pedal 99 is pushed down in FIG. 15), the two side pedals 96 and 98 supporting the center pedal 99 It is pushed down at the same time. When the two side pedals 96 and 98 are pushed down at the same time, the head end 32 and the foot end 34 of the upper frame 26 are evenly lowered. When the pressure applied to the center pedal 99 is removed, the lowering of the upper frame 26 stops.
As shown in FIGS. 13 to 16, the first linkage 530 has an arm 532. The arm 532 extends laterally outward from each of the left and right frame members 106 and 108 of the lower frame 22. That is, one arm 532 extends laterally outward from the left frame member 106, and another arm 532 extends laterally outward from the right frame member 108. As shown in FIG. 13, the arms 532 are attached to the corresponding lateral frame members 106, 108, respectively, so that they can rotate around the rotation axis 534 defined by the longitudinal pin 536 near the midpoint thereof. ing. The longitudinal pin 536 is supported by a pair of longitudinally spaced flanges 538 of the bracket 540 secured to the corresponding lateral frame members 106, 108. The outer end 542 of each arm 532 supports the cranial end side pedal 96. The medial end 544 of each arm 532 is connected to the lateral shaft 546 via a link 548. The lateral shaft 546 is supported by the longitudinally extending laterally spaced flanges 550 of the respective corresponding brackets 540 secured to the lateral frame members 106, 108. As shown in FIG. 16, the distal end 552 of each link 548 extends through a slightly larger opening 554 at the medial end of each corresponding arm 532. The proximal end 556 of each link 548 is recessed into an opening 558 in the lateral shaft 546.
As shown in FIGS. 2 to 3 and 13 to 16, the rod 570 extending in the longitudinal direction is connected to the lower frame 22 so as to be movable in the reciprocating longitudinal direction as shown by the bidirectional arrow 572. The cranial end 32 of the rod 570 holds the flange 574 (FIG. 3). This flange 574 activates the head end hydraulic or pressure release pin 520 (FIG. 18) of the hydraulic pump 92. The foot end 34 of the rod 570 is connected to a flange 576 (FIG. 16) extending downward from below the lateral shaft 546. When one of the cranial end side pedals 96 is pushed down, the corresponding outer end 542 of the arm 532 is lowered. When the outer end 542 of the arm 532 is lowered, the inner end 544 of the arm 532 is raised. As the medial end 544 of the arm 532 rises, so does the distal end 552 of the link 548. As the distal end 552 of the link 548 rises, the lateral shaft 546 rotates clockwise 580 (FIG. 14) about the rotation axis 582 as viewed from the left 36 of the stretcher 20. As the lateral shaft 546 rotates clockwise 580, the rod 570 is pulled towards the foot end 34 in the direction of 584, activating the cranial end pressure release pin 520 (FIG. 18) on the cranial side. The end hydraulic pressure or the pressure in the hydraulic cylinder 82 is released, which lowers the head end 32 of the upper frame 26. When the pressure applied to the cranial end side pedal 96 is removed, the descent of the cranial end 32 of the upper frame 26 stops.
As shown in FIGS. 2 to 3 and 13 to 16, the second linkage 630 has an arm 632. The arm 632 extends laterally outward from each of the left and right frame members 106 and 108 of the lower frame 22. That is, one arm 632 extends laterally outward from the left frame member 106, and another arm 632 extends laterally outward from the right frame member 108. The arms 632 are attached to the corresponding lateral frame members 106, 108, respectively, so that they can rotate around the rotation axis 534 defined by the longitudinal pin 536 near the midpoint thereof. The longitudinal pin 536 is supported by a pair of longitudinally spaced flanges 538 of the bracket 540 secured to the corresponding lateral frame members 106, 108. The outer end 642 of each arm 632 supports the foot side end side pedal 98. The inner end 644 of each arm 632 is connected to the lateral shaft 646 via a link 648. The lateral shaft 646 is supported by the longitudinally extending laterally spaced flanges 550 of the respective corresponding brackets 540 secured to the lateral frame members 106, 108. The distal end 652 of each link 648 extends through a slightly larger opening 654 at the medial end of each corresponding arm 632. The proximal end 656 of each link 648 is fitted into an opening 658 in the lateral shaft 646.
As shown in FIGS. 13 to 16, a rod 670 extending in the longitudinal direction is connected to the lower frame 22 so as to be movable in the reciprocating longitudinal direction as indicated by the bidirectional arrow 672. The foot side end 34 of the rod 670 holds the flange 674. This flange 674 activates the foot side end hydraulic pressure or the pressure release pin 520 of the hydraulic pump 94. The cranial end 32 of the rod 670 is connected to a flange 676 extending downward from below the lateral shaft 646. When one of the foot side end side pedals 98 is pushed down, the corresponding outer end portion 642 of the arm 632 is lowered. When the outer end 642 of the arm 632 is lowered, the inner end 644 of the arm 632 is raised. As the medial end 644 of the arm 632 rises, so does the distal end 652 of the link 648. When the distal end 652 of the link 648 rises, the lateral shaft 646 rotates clockwise 680 (FIG. 16) about the rotation axis 682 as viewed from the left 36 of the stretcher 20. When the lateral shaft 646 rotates clockwise 680, the rod 670 is pushed toward the foot end 34 in the direction of 684, activating the foot end pressure release pin 520 to actuate the foot end hydraulic pressure. Alternatively, the pressure in the hydraulic cylinder 84 is released, thereby lowering the foot side end 34 of the upper frame 26. When the pressure applied to the foot side end side pedal 98 is removed, the foot side end 34 of the upper frame 26 stops descending.
FIG. 17 shows the pedals 96, 98, 99 on the left side 36 of the stretcher 20. The pedals 96, 98, 99 on the right side 38 of the stretcher 20 are similar. As shown in FIG. 17, the head side end side pedal 96 has an upper wall 700, a right wall 702, a left wall 704, a front wall 706, and a rear wall 708. The right, left, front, and rear walls 702, 704, 706, and 708 extend downward from the outer circumference of the upper wall 700. As shown in FIGS. 13 to 15, the upper wall 700 gradually decreases downward toward the head end portion 32. The left wall 704 is also the inner side wall 704 of the head side end side pedal 96 and faces the foot side end side pedal 98. The walls 702 and 706 are also the outer walls 702 and 706 of the side pedal 96 and are exposed. The left wall or inner wall 704 has a first portion 710 having a first height and a second portion 712 arcing forward and upward towards the front wall 706. The rear wall 708 has a first portion 714 having a first height and a second portion 716 having a second height smaller than the first height. The two outer walls 702 and 706 each have the second height. The left wall or inner wall 704 has a bow slot 718. The front wall 706 and the rear wall 708 of the side pedal 96 extend slightly longer than the left wall, that is, the inner side wall 704, forming a pair of vertically extending opposing ribs 720.
Please continue to refer to Figure 17. The foot side end side pedal 98 corresponds to a mirror image of the head side end side pedal 96. The side pedal 98 has an upper wall, a right wall, a left wall, a front wall, and a rear wall. The right, left, front, and rear walls of the side pedal 98 extend downward from the outer circumference of the upper wall. As shown in FIGS. 13 to 15, the upper wall of the side pedal 98 gradually decreases downward toward the foot side end 34. The right wall, or inner wall, of the foot end side pedal 98 is the wall facing the head end side pedal 96, with a first portion having a first height and an arc in the anterior-upward direction toward the anterior wall. It has the second part to be drawn. The rear wall has a first portion having a first height and a second portion having a second height smaller than the first height. The two outer walls of the side pedal 98 each have the second height. The right wall or inner wall of the side pedal 98 has a bow slot 718 similar to the bow slot 718 of the left wall or inner side wall 704 of the side pedal 96. The front and rear walls of the side pedal 98 extend slightly longer than the right wall, forming a vertically extending rib 720. When the side pedals 96, 98 are attached to the corresponding arms 532, 632, the two inner sidewalls 704 and ribs 720 of the side pedals 96, 98 form a vertically extending cavity 722.
As shown in FIG. 17, the central pedal 99 has a main body portion 750 and a flange portion 752 extending in the lateral direction. The flange portion 752 extends downward from the main body portion 750. The main body portion 750 has an upper wall 760, a right wall 762, a left wall 764, a front wall 766, and a rear wall 768. The right, left, front, and rear walls 762, 764, 766, and 768 extend downward from the outer circumference of the upper wall 760. As shown in FIGS. 13 to 15, the upper wall 760 gradually decreases forward toward the left end 36. The outer walls 762, 764, 766 of the center pedal 99, the outer walls 702, 706 of the side pedal 96, and the outer walls 703, 707 (Fig. 14) of the side pedal 98, respectively, have substantially the same height. ing. The longitudinal extension pin 770 is fitted into the opening 772 in the lateral extension flange portion 752. A plurality of longitudinal reinforcing ribs 774 extend downward from the underside of the upper wall 760. Two longitudinal ribs 776 extend upward from above the top wall 760.
When the center pedal 99 is placed on top of the two side pedals 96 and 98, 1) as shown in FIGS. 13 to 15, the downward facing surface of the center pedal 99 is that of the side pedals 96 and 98. Placed on an upward facing surface, 2) the flange portion 752 of the center pedal 99 extends vertically formed between each inner wall 704 of the side pedals 96, 98 and each rib 720. 3) Each outer end of the longitudinal extension pin 770 is received by each arched slot 718 on each inner side wall 704 of the side pedals 96, 98. , 4) As shown in FIGS. 13 to 15, the side pedals 96 and 98 extend outward beyond the center pedal 99, exposing a surface that the user can push down with his or her foot. As a result, the center pedal 99 is held by the side pedals 96 and 98 and is arranged so as to float on the side pedals 96 and 98 without directly contacting the lower frame 22. With this arrangement, 1) both side pedals 96 and 98 are lowered at the same time (by pushing down the center pedal 99), and both the cranial end 32 and the foot end 34 of the upper frame 26 are lowered evenly. That, or 2) the head side end side pedal 96 is individually lowered to lower the head side end 32 of the upper frame 26, or 3) the side pedal 98 is individually lowered to the foot side of the upper frame 26. It is possible to lower the end 34.
Although the specific exemplary embodiments have been described in detail above, various modifications and changes are also included in the scope and purpose of the present disclosure. The scope and purpose of this disclosure are as described and defined in the appended claims. In particular, the following drawings will be referred to in the detailed description.
<figref num="1">FIG. 1 is a perspective view of an exemplary stretcher, with a lower frame supported on casters, an upper frame supported above the lower frame, and a deck held by the upper frame. A deck that has a head part, a seat part, a thigh part, and a foot part, a pair of push handles connected to the upper frame near the head end of the stretcher, and a relative of the upper frame. A pair of side rails on each side and a plurality of foot pedals connected to the lower frame are shown.</figref><figref num="2">FIG. 2 is a perspective view showing the lower frame with the cover removed to clearly indicate the lower frame, with the lower frame having two lateral frame members extending between the two longitudinal lateral frame members. And the casters connected to each end of each of the two lateral frame members, the hydraulic or hydraulic pump at the head end supported by the lower frame, and the hydraulic or hydraulic pump at the cylinder and foot end. The cylinder, the straight wheels supported by the lower frame in the central region of the lower frame, the longitudinal brake / straight shaft, and the two connected to the opposite ends of the longitudinal brake / straight shaft. A butterfly pedal, a lateral brake / straight shaft, two butterfly pedals connected to the opposite ends of the lateral brake / straight shaft, and a cranial end connected to the lateral brake / straight shaft. And a frame member moving in the longitudinal direction having a foot-side end connected to a lateral brake rod near the foot-side end.</figref><figref num="3">FIG. 3 is a perspective view showing the lower frame with the cover removed to clearly indicate the lower frame, with the lower frame having two lateral frame members extending between the two longitudinal lateral frame members. And the casters connected to each end of each of the two lateral frame members, the hydraulic or hydraulic pump at the head end supported by the lower frame, and the hydraulic or hydraulic pump at the cylinder and foot end. The cylinder, the straight wheels supported by the lower frame in the central region of the lower frame, the longitudinal brake / straight shaft, and the two connected to the opposite ends of the longitudinal brake / straight shaft. A butterfly pedal, a lateral brake / straight shaft, two butterfly pedals connected to the opposite ends of the lateral brake / straight shaft, and a cranial end connected to the lateral brake / straight shaft. And a frame member moving in the longitudinal direction having a foot-side end connected to a lateral brake rod near the foot-side end.</figref><figref num="4">FIG. 4 is an enlarged perspective view showing a part of the cranial end of the lower frame, in which the cranial end of the longitudinal brake / straight shaft is connected to the lateral brake rod near the cranial end. The linkage is shown in more detail, and another linkage is shown in which a lateral brake rod near the cranial end is connected to the cable of a manually actuated caster brake device.</figref><figref num="5">Figure 5 shows a short flange connected to the brake / straight shaft and a connecting rod connected to the lateral brake rod near the head end, and is generally vertical to receive the pins extending from the short flange. It is an end view which shows the connection with the connection rod which has a slot extending in.</figref><figref num="6">FIG. 6 is an enlarged perspective view showing a part of the foot side end of the lower frame, in which the foot side end of the longitudinal brake / straight shaft is connected to the lateral brake rod near the foot side end. The linkage is shown in more detail, and another linkage that connects the lateral brake rod to a frame member that moves longitudinally is shown.</figref><figref num="7">FIG. 7 is an enlarged top perspective view of a portion of a manually actuated caster brake device, disassembled showing a brake handle, a push handle, and a flexible cover that wraps the brake handle and part of the push handle. It is a perspective view.</figref><figref num="8">FIG. 8 is a cross-sectional view showing a portion of an active brake caster in neutral mode, with a cam mounted on a lateral brake rod, a plunger having a tip received in the notch of the cam, and vertical and vertical. It shows a molded brake shoe that is rotatably connected to the lower end of the plunger and a standard brake shoe that is fixed and connected to the plunger below the molded brake shoe, both of which are caster wheels. It is shown in a state of being separated from.</figref><figref num="9">FIG. 9 is a cross-sectional view similar to that of FIG. 8, but the cam is rotated about 28 ° clockwise from the position shown in FIG. 8 to cause the molded brake shoe to engage with the caster wheel. Shown.</figref><figref num="10">FIG. 10 is a cross-sectional view similar to that of FIGS. 8 to 9, but is rotated about 45 ° clockwise from the position shown in FIG. 8 in the clockwise direction for braking, causing engagement of both brake shoes with the caster wheels. Shows the cam.</figref><figref num="11">FIG. 11 is an enlarged bottom perspective view corresponding to FIG. 8, showing the brake shoes and caster wheels.</figref><figref num="12">FIG. 12 is a front elevation view of the cam, showing three notches corresponding to the brake, neutral, and straight forward positions on the casters.</figref><figref num="13">FIG. 13 is an enlarged perspective view showing a part of the left side of the lower frame, showing the pump pedal, the pair of side pedals, and the center pedal supported by the side pedals in more detail.</figref><figref num="14">FIG. 14 is an enlarged perspective view similar to FIG. 13, but is shown in a state where the head side end side pedal is pushed down in order to lower the head side end portion of the upper frame.</figref><figref num="15">FIG. 15 is an enlarged perspective view similar to FIG. 13, but is shown with the center pedal depressed in order to lower both ends of the upper frame.</figref><figref num="16">FIG. 16 is a bottom perspective view showing a linkage in which each side pedal is connected to the head / foot side end release pin.</figref><figref num="17">FIG. 17 is a perspective view showing a center pedal and two side pedals supporting the center pedal.</figref><figref num="18">FIG. 18 has a pump rod that is spring loaded by a compression spring towards the cranial end and a pressure release pin that is also spring-loaded by another compression spring towards the cranial end. It is a diagram which shows the head side end hydraulic pressure or a hydraulic cylinder.</figref>
Code description
20 stretcher 22 Lower frame 24 casters 26 Upper frame 28 Lifting adjustment mechanism 30 Patient support deck 32 Cranial end 34 Foot side end 36 left side 38 right 40 Longitudinal axis 42 Deck head 44 Deck seat 46 Deck thigh 48 Deck foot part 50 floors 56, 58 side rails 60 caster stem 62 Caster York 64 caster wheels 66 Left push handle 68 Right push handle 70 handle post 72 Bent deferred post 74 Pivot Post 76 Upward extension of push handle 78 Bent part of push handle 80 Push handle bottom 82 Hydraulic or hydraulic cylinder at the end of the head 84 Hydraulic or hydraulic cylinder at the end of the foot 86 boots 90 pump pedal 92 Cranial end hydraulic or hydraulic pump 94 Foot side end hydraulic or hydraulic pump 96 Head side end side pedal 98 Foot side end side pedal 99 center pedal 100 caster brake mechanism 102 Cranial end lateral frame member 104 Foot side end horizontal frame member 106 Left frame member 108 Right frame member 110 right angle bracket 129 Longitudinal axis of brake / straight shaft 130 Brake / Straight shaft 131 Brake part 132 Cranial end brake pedal 133 Straight part 134 Foot side end brake pedal 136 bracket 142 Cranial end linkage 144 Linkage at the end of the foot 152 Lateral brake rod at the cranial end 154 Lateral brake rod at the end of the foot 169 Brake / Straight shaft 170 Longitudinal axis 170 Brake / Straight shaft 172 bracket 174 Pivot link 176 break pedal 180 Longitudinal moving member 182 articulation 184 Flange of connecting body 182 186 Lateral extension pin 192 bracket 194 Brake / Straight shaft 170 Brake direction 196 Brake / Straight shaft 170 Straight direction 200 linkage 142 conjugate 202 Link of Connection 200 206 pivot pin 208 connecting rod 210 eyebolts 212 Short flange 214 Upper part of connecting rod 208 216 Bent shape lower part of connecting rod 208 218 Bent-shaped slot of connecting rod 208 226 Longitudinal pin 228 Brake / Straight shaft 130 Brake direction 230 Brake rod 152 brake direction 234 Brake / Straight shaft 130 Straight direction 235 linkage 236 Straight wheels 240 Longitudinal pin 242 Brake rod 152 in the straight direction 244 Upward face-to-face 250 Coupling of foot side end linkage 144 252 Link of connection 250 256 Horizontal Pivot Pins 258 connecting rod 262 Flange 264 eyebolt 276 Pivot Pin 280 Brake rod 154 brake direction 282 Straight direction of brake rod 154 290 cam 292, 294, 296 Cam 290 notch 298 Cam 290 edge 300 caster brake device 302 Brake handle 304 mounting bracket 308 rotating shaft 312 cover 314 end cap 316 Upper half shell 318 Bottom half shell 320 hub part 322 grip part 324 Legs 326, 328 Mounting post for end cap 314 330 Edge cap 314 edge 332 Cavity of end cap 314 334 End cap 314 opening 336 Large through opening 338 Screw insertion opening 340 Tubular cylinder 342 Flange 344 Large opening 346 screw insertion opening 348 First and second washers 370 Bowden cable 372 sheath 374 wire 376 First end of wire 374 378 Second end of wire 374 380 lever 382 Leg part 324 opening 384 cylinder 392 Lever 380 opening 396 External opening slot 398 Upward extension flange 400 bracket 402 Upward facing face of horizontal rail 102 404 side plate 420 vertical axis 422 horizontal axis 424 Plunger housing 426 bearing 428 bearing housing 430 Plunger 438 Plunger 430 color 440 Ring seat part 442 Plunger 430 tip 444 Ring plate 446 Downward facing teeth 448 Molded brake shoes 450 standard brake shoes 452 retainer 458 Ring seat part 460 stud 462 tread 464 York 62 plate 470 Annular part of molded brake shoe 472 Curved wheel engagement flange part of molded brake shoe 510 Reciprocating mounted bar 512 pump rod 518 linkage 520 Pressure release pin or button 530 linkage 532 arm 534 Rotating axis 536 Longitudinal pin 538 Flange 540 bracket 542 Outer end of arm 532 544 Inner end of arm 532 546 Lateral shaft 548 links 550 flange 552 Link 548 distal end 554 Large opening of arm 532 556 Proximal end of link 548 558 Lateral shaft 546 opening 570 Longitudinal extension rod 574 Flange 582 Lateral shaft 546 rotation axis 630 linkage 632 arm 642 Outer end of arm 632 644 Inner end of arm 632 646 Lateral shaft 648 links 652 Distal end of link 648 654 Large opening of arm 632 656 Proximal end of link 648 658 Lateral shaft 646 opening 670 Longitudinal extension rod 674 Flange 682 Lateral shaft 646 rotation axis 700 Side pedal 96 upper wall 702 Right wall of side pedal 96 704 Left wall of side pedal 96 706 Front wall of side pedal 96 708 Rear wall of side pedal 96 710 Left wall 704 first part 712 Left wall 704 second part 714 First part of rear wall 708 716 Second part of rear wall 708 718 bow slot 720 ribs 722 Cavity 750 Central pedal 99 body 752 Flange part of center pedal 99 760 Upper wall of center pedal 99 762 Right wall of center pedal 99 764 Left wall of center pedal 99 766 Front wall of center pedal 99 768 Rear wall of center pedal 99 770 Longitudinal extension pin 772 Flange portion 752 opening 774 Longitudinal reinforcement ribs 776 Longitudinal rib
Every citation, both ways
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Priority claims15
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| EP2298262B1 | European Patent Office (EPO) | B1 | |
| US2013160209A1 | United States of America | A1 | |
| EP1810652B1 | European Patent Office (EPO) | B1 | |
| US8910329B2 | United States of America | B2 |
22 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Renewal fee payment (event date is renewal date of database)FPAY | FPAY | |
| Certificate of patent or registration of utility modelJAPANESE INTERMEDIATE CODE: R150R150 | R150 | |
| Certificate of patent or registration of utility modelJAPANESE INTERMEDIATE CODE: R150R150 | R150 | |
| First payment of annual fees (during grant procedure)JAPANESE INTERMEDIATE CODE: A61A61 | A61 | |
| Written decision to grant a patent or to grant a registration (utility model)JAPANESE INTERMEDIATE CODE: A01A01 | A01 | |
| Written decision to grant a patent or to grant a registration (utility model)JAPANESE INTERMEDIATE CODE: A01A01 | A01 | |
| Decision of grant or rejection writtenTRDD | TRDD | |
| Request for written amendment filedJAPANESE INTERMEDIATE CODE: A523A521 | A521 | |
| Notification of reasons for refusalJAPANESE INTERMEDIATE CODE: A131A131 | A131 | |
| Report on retrievalJAPANESE INTERMEDIATE CODE: A971007A977 | A977 | |
| Written request for application examinationJAPANESE INTERMEDIATE CODE: A621A621 | A621 | |
| Request for written amendment filedJAPANESE INTERMEDIATE CODE: A821A521 | A521 |
Numbers
- Publication
- 5087285
- Publication, DOCDB
- 5087285
- Publication, EPODOC
- JP5087285B
- Application
- 10835
- Application, DOCDB
- 2007010835
- Application, EPODOC
- JP20070010835
Titles2
- Japanese
- 手動で作動させるキャスターブレーキ装置を有するストレッチャー
- English
- Stretcher with manually actuated caster brakes
Classification
- CPC, 19
- A61G1/04
- A61G1/0225
- A61G1/0243
- A61G1/0268
- A61G1/0287
- A61G1/048
- A61G7/0528
- B60B33/0005
- B60B33/0021
- B60B33/0039
- B60B33/0049
- B60B33/0057
- B60B33/0068
- B60B33/0073
- B60B33/0081
- B60B33/0092
- B60B33/021
- B60B33/025
- B60B33/026
- IPC, 3
- A61G1 02
- B62B5 04
- B62B5 06