Heavy object support device

The present invention relates to a heavy object support device that movably supports a heavy object.

Conventionally, when machining a work with a machine tool, the work of adjusting the position of the work and arranging it at a position suitable for machining (so-called centering work) has been performed. When the work to be processed is a heavy object, a heavy object support device for movably supporting the work is used.

Such a heavy object support device includes a support having a sliding surface on which a heavy object is placed, a fluid sealing mechanism having an elastic ring arranged in an annular ring groove formed on the sliding surface, and a sliding surface. It is provided with a fluid supply means for supplying a pressurized fluid into a hydraulic pocket, which is a space surrounded by an elastic ring between the surface and a heavy object placed on the sliding surface. Further, the support is formed with a fluid supply path for guiding the oil supplied from the fluid supply means into the hydraulic pocket (see, for example, Patent Document 1).

In the heavy object support device, when the heavy object is placed on the sliding surface of the support, the elastic ring comes into close contact with the heavy object over the entire circumference, whereby a hydraulic pocket is formed.

When the supply of oil by the fluid supply means is started, the pressure of the oil in the hydraulic pocket increases as the oil that has passed through the fluid supply path flows into the hydraulic pocket. Then, when the pressure of the oil in the hydraulic pocket is sufficiently increased, the heavy object is lifted on the support and separated from the sliding surface, and the heavy object is movably supported on the support.

<p num="0006"><patcit num="1"><text>International Publication No. 2005/075859</text></patcit></p>

<p num="0007"> By the way, in the above-mentioned heavy object support device, a hydraulic pocket is formed by closing an open space on the sliding surface (a space surrounded by an elastic ring on the sliding surface) with a heavy object. In order to increase the hydraulic pressure in the pocket and support a heavy object, it is necessary to generate a hydraulic pressure that can support the heavy object by supplying oil into the hydraulic pocket from the outside and then maintain the hydraulic pressure. is there.</p><p num="0008"> Under these circumstances, the above-mentioned heavy object support device requires a device and control for supplying oil from the outside into the hydraulic pocket and maintaining the hydraulic pressure in the hydraulic pocket, but depending on the usage environment. Something simple and easy to handle may be desired.</p><p num="0009"> Therefore, in view of such circumstances, it is an object of the present invention to provide a heavy object support device capable of generating and holding a pressure for supporting a heavy object without supplying a liquid from the outside. And.</p>

<p num="0010"> The heavy object support device according to the present invention has elasticity and is described above with a mounting table on which a supported object is placed and a base arranged so as to form a gap between the mounting tables. It is provided with at least one annular seal member arranged between the pedestal and the base, and the above-mentioned pedestal is formed with an annular arrangement groove in which the seal member is arranged. The filling space surrounded by the seal member is sealed between the table and the base in a state of being filled with a liquid, and the seal member supports the above-mentioned stand with a gap between the base and the above-mentioned base. It is configured to be compressible so as to reduce the gap between the stand and the base.</p><p num="0011"> According to the heavy object support device having the above configuration, the filled space filled with the liquid is composed of a sealed space surrounded by a sealing member between the mounting table and the base. Therefore, in the heavy object support device, the outflow of the liquid in the filling space is prevented, and the intrusion of air into the filling space is also prevented, so that the filling space is maintained in a sealed state.</p><p num="0012"> In addition, since the seal member supports the mounting table with a gap between the mounting table and the base and can be compressed to reduce the gap between the mounting table and the base, a heavy object is placed on the mounting table. Then, the mounting base approaches the base while compressing the liquid and the sealing member due to the load of the heavy object. Along with this, the pressure of the liquid in the filling space increases, and the pressure acts on the heavy object, so that the heavy object is supported in a movable state with a small force.</p><p num="0013"> Then, when the heavy object is removed from the mounting table, the sealing member elastically recovers, and the distance (gap) between the mounting table and the base is restored.</p><p num="0014"> As described above, in the heavy object support device, the filled space filled with the liquid is sealed before and after supporting the heavy object (that is, leakage from the liquid filling space and intrusion of air into the filling space). Since it is maintained in a prevented state), it is possible to easily increase the pressure of the liquid without supplying the liquid from the outside.</p><p num="0015"> In the heavy object support device of the present invention, a plurality of the sealing members are provided, and each of the plurality of sealing members is arranged between a single pre-described pedestal and the single pedestal, and the plurality of sealing members. The filled space may be formed in the area surrounded by each.</p><p num="0016"> According to such a configuration, since a plurality of the filled spaces are formed between the single mounting table and the single base, even if the load of a heavy object is concentrated at a position off the center of the mounting table. , It is possible to prevent the mounting table from tilting with respect to the base.</p><p num="0017"> In the heavy object support device of the present invention, the base and the pre-described pedestal have facing surfaces facing each other, and within a range in which the pre-described pedestal and the base are maintained in close contact with each other on the seal member. Then, the relative motion of the base and the pre-described pedestal to bring the opposing surfaces into contact with each other, and the pre-described pedestal in the direction orthogonal to the direction in which the facing surface of the base and the facing surface of the pre-described pedestal are brought into contact with each other It may be provided with a separation prevention structure that enables relative movement between the base and the base.</p><p num="0018"> According to such a configuration, when the previously described pedestal and the pedestal are relatively moved, the close contact state between the previously described pedestal and the base on the seal member is maintained, so that the liquid leaks from the filled space. Is surely prevented, and the intrusion of air into the filled space is also prevented.</p><p num="0019"> The heavy object support device of the present invention includes a pressure control structure that controls the pressure of the liquid in the filling space, and the pressure control structure is in a sealed space that communicates with the filling space and is filled with the liquid. A storage space may have a control chamber formed therein, which may be configured to allow pressure changes within the storage space.</p><p num="0020"> According to the heavy object support device having the above configuration, a storage space that communicates with the filling space and is a sealed space filled with liquid is formed inside the adjustment chamber, and the pressure in the storage space is changed. Therefore, the pressure of the liquid in the filled space can be adjusted by changing the pressure in the storage space.</p>

<p num="0021"> As described above, the heavy object support device according to the present invention is excellent in that it can generate and maintain a pressure for supporting a heavy object without supplying a liquid from the outside into the filled space. Can produce the effect.</p>

<figref num="1">FIG. 1 is a perspective view of a heavy object support device according to the first embodiment of the present invention.</figref><figref num="2">FIG. 2 is a vertical cross-sectional view of the heavy object support device according to the same embodiment.</figref><figref num="3">FIG. 3 is a bottom view of the mounting table of the heavy object support device according to the same embodiment.</figref><figref num="4">FIG. 4 is a plan view of the base of the heavy object support device according to the same embodiment.</figref><figref num="5">FIG. 5 is an enlarged view of the heavy object support device according to the same embodiment, and is an enlarged view of the area A of FIG.</figref><figref num="6">6A and 6B are explanatory views of a heavy object support device according to the same embodiment, FIG. 6A is an explanatory view of a state in which a heavy object is not placed on a mounting table, and FIG. It is explanatory drawing of the state which supports a heavy object.</figref><figref num="7">FIG. 7 is a perspective view of a heavy object support device according to another embodiment of the present invention.</figref><figref num="8">FIG. 8 is a perspective view of a heavy object support device according to another embodiment of the present invention.</figref><figref num="9">FIG. 9 is a cross-sectional view of a heavy object support device according to another embodiment of the present invention, and is a cross-sectional view taken along the line IX-IX of FIG.</figref><figref num="10">FIG. 10 is a perspective view of a heavy object support device according to still another embodiment of the present invention.</figref><figref num="11">FIG. 11 is a cross-sectional view of the heavy object support device according to still another embodiment of the present invention, and is a cross-sectional view taken along the line XI-XI of FIG.</figref>

Hereinafter, the heavy object support device according to the first embodiment of the present invention will be described with reference to the accompanying drawings. The heavy object support device according to the present embodiment is for movably supporting a heavy object. In the present embodiment, the heavy object is, for example, a work to be machined by a machine tool, a stand on which the work is placed, or the like.

As shown in FIGS. 1 and 2, heavy supporting device 1 according to this embodiment includes a mounting table 2 for heavy O is placed, gap between the mounting table 2 between D is formed An annular groove arranged in an annular groove (arrangement groove 210 described later) formed on the mounting base 2 so as to have elasticity and open toward the base 3. It is equipped with a seal member 4.

As shown in FIGS. 2 and 3, the mounting table 2 is located on the side opposite to the mounting surface 20 that receives the heavy object O to be mounted (see FIG. 2) and the mounting surface 20, and is a base. It has a facing surface 21 facing the surface 3.

An arrangement groove 210, which is an endless annular groove in which the seal member 4 is arranged, is formed on the facing surface 21. Further, the facing surface 21 includes a pressure receiving surface 211 located in the region surrounded by the arrangement groove 210 and a sliding surface 212 located in the region outside the arrangement groove 210. In the present embodiment, the following description may be given with the pressure receiving surface 211 and the sliding surface 212 of the facing surface 21 as the supporting surface 213.

As shown in FIG. 2, the arrangement groove 210 includes a bottom surface 210a which is an annular plane, an inner wall surface 210b which stands up from the entire inner peripheral edge of the bottom surface 210a, and an outer wall surface 210c which stands up from the entire outer peripheral edge of the bottom surface 210a. Is defined by.

The arrangement groove 210 is formed so that the arranged seal member 4 has a depth that partially protrudes toward the base 3 side from the facing surface 21. Therefore, as shown in FIG. 5, the seal member 4 arranged in the arrangement groove 210 is in a non-supported state in which the heavy object O is not placed on the mounting table 2, and the heavy object O placed on the mounting table 2 is placed. In each of the supporting states, the arrangement groove 210 partially protrudes toward the base 3 side.

As described above, in the heavy object support device 1 according to the present embodiment, a part of the seal member 4 protrudes from the arrangement groove 210 toward the base 3 side in each of the supported state and the non-supported state. Therefore, the distance between the sliding surface 212 of the mounting table 2 and the sealing surface 30 of the base 3 is increased or decreased while maintaining the close contact between the sealing member 4 and the mounting table 2 and the base 3. The mounting base 2 can be brought into contact with and separated from the base 3.

The width of the arrangement groove 210 (distance between the inner wall surface 210b and the outer wall surface 210c) is set to be larger than the width of the sealing member 4. Therefore, in the present embodiment, the seal member 4 arranged in the arrangement groove 210 is in contact with the outer wall surface 210c over the entire circumference and is opposed to the inner wall surface 210b with a gap.

The pressure receiving surface 211 is formed so as to be located on the mounting surface 20 side of the tip of the portion protruding from the arrangement groove 210 of the seal member 4. If a gap D can be secured between the pressure receiving surface 211 and the base 3 (the sealing surface 30 described later of the base 3) before and after supporting the heavy object O, the pressure receiving surface 211 is a sliding surface in the orthogonal direction. It may be formed at the same level as the 212, or may be formed so as to be located on the base 3 side of the sliding surface 212 or on the mounting surface 20 side of the sliding surface 212. Further, in the present embodiment, the pressure receiving surface 211 and the sliding surface 212 are parallel to each other.

As shown in FIGS. 2 and 4, the base 3 has a facing surface (referred to as a sealing surface in the present embodiment) 30 arranged toward the mounting table 2. The sealing surface 30 is a surface parallel to the sliding surface 212.

The sealing surface 30 of the base 3 according to the present embodiment faces the sliding surface 212 of the mounting table 2 with a gap D in the orthogonal direction in each of the non-supported state and the supported state. To do.

The gap D between the sealing surface 30 of the base 3 and the sliding surface 212 of the mounting base 2 is maximum in the non-supported state, and is configured to be small by switching from the non-supported state to the supported state. There is. The base 3 and the mounting base 2 are configured so that a gap D is left between them in the supported state.

The sealing surface 30 is a surface formed flat over the entire area, and is arranged so as to face the facing surface 21 of the mounting table 2. Further, since the sealing member 4 arranged in the arrangement groove 210 is in pressure contact with the sealing surface 30, the sealing surface 30 and the bottom surface 210a of the arrangement groove 210 cooperate to compress the sealing member 4. ing.

In the present embodiment, the region of the sealing surface 30 where the seal member 4 is in contact is the seal region 300, the region inside the seal region 300 is the inner pressure receiving region 301, and the region outside the seal region 300 is the outside. The following description may be given as the sliding region 302.

The seal member 4 is in close contact with the mounting base 2 and the base 3 over the entire circumference. Therefore, a filling space S, which is a space surrounded and sealed by the sealing member 4, is formed between the mounting base 2 and the base 3. The filling space S is filled with a liquid (oil in this embodiment) F. Therefore, in the present embodiment, the filling space S surrounded by the sealing member 4 between the mounting base 2 and the base 3 is filled with the liquid F and sealed.

As shown in FIG. 5, the sealing member 4 includes an elastic annular sealing ring 40 and a protective ring 41 which is annular and is externally fitted to the sealing ring 40.

The sealing ring 40 has a circular cross section. Further, the sealing ring 40 is formed so as to have a size that partially protrudes from the arrangement groove 210 when it is arranged in the arrangement groove 210. That is, the thickness (diameter in the cross section) of the sealing ring 40 is larger than the depth of the arrangement groove 210.

The protection ring 41 has a regulation portion 410 sandwiched between the sealing ring 40 and the base 3, and a peripheral wall portion 411 that is continuous with the regulation portion 410 and is arranged in the arrangement groove 210. Further, on the inner peripheral side of the protection ring 41, a storage recess 412 having a shape along the outer shape of the sealing ring 40 is formed.

As described above, in the sealing ring 40, since the sealing ring 40 partially protrudes from the arrangement groove 210, the regulating portion 410 outerly fitted in the sealing ring 40 also partially protrudes from the arrangement groove 210. It is protruding.

The peripheral wall portion 411 is sandwiched between the outer wall surface 210c of the arrangement groove 210 and the sealing ring 40 over the entire circumference, and is in contact with the sealing surface 30 of the base 3.

The heavy object support device 1 according to the present embodiment has the above-mentioned configuration. Next, a method of using the heavy object support device 1 according to the present embodiment will be described with reference to the attached drawings.

In the heavy object support device 1, the distance between the mounting base 2 and the base 3 is maximum in the non-supported state. Then, when the heavy object O is placed on the mounting surface 20, the mounting table 2 approaches the base 3 while compressing the sealing ring 40 of the sealing member 4 due to the load of the heavy object O, and the mounting table 2 and the base As the distance from the table 3 narrows, the pressure of the liquid F in the filling space S increases.

As a result, the pressure generated in the liquid F acts on the mounting table 2 (the pressure generated in the liquid F receives a part of the load of the heavy object O), so that the heavy object O is made very small together with the mounting table 2. It can be linearly or rotationally moved in a plane parallel to the sliding surface 212 by force.

When the mounting base 2 approaches the base 3, the facing surface 21 of the mounting base 2 is inclined with respect to the sealing surface 30 of the base 3, and a part of the facing surface 21 is the sealing surface 30. When the liquid F is in contact with the liquid F, the heavy object O is supported by the pressure generated in the liquid F and the reaction force generated in the contact portion between the facing surface 21 and the sealing surface 30. Even in this case, since the pressure generated in the liquid F receives a part of the load of the heavy object O, the heavy object O can be linearly moved or rotationally moved with a very small force.

Then, when the heavy object O is removed from the mounting base 2, the mounting base 2 moves in a direction away from the base 3, the gap D between the mounting base 2 and the base 3 expands, and the liquid in the filling space S The pressure of F decreases (returns to the original). Along with this, the seal member 4 elastically recovers, and the heavy object support device 1 is in a state (standby state) in which the heavy object O can be supported again.

As described above, in the heavy object support device 1, the filled space S filled with the pre-encapsulated liquid F is sealed before and after supporting the heavy object O (that is, the liquid F from the filled space S). Since it is maintained in a state where leakage to the outside and air intrusion into the filling space S are prevented), the pressure of the liquid F naturally increases when the heavy object O is placed on the mounting surface 20. ..

Therefore, the heavy object support device 1 can generate and maintain the pressure for supporting the heavy object O without supplying the liquid from the outside into the filling space S, and is simple and easy to handle. It can produce excellent effects.

Further, in the heavy object support device 1, since the seal member 4 is brought into contact with the outer wall surface 210c of the arrangement groove 210 over the entire circumference, the pressure of the liquid F in the filling space S increases and the liquid F is sealed. Even if an outward pressure acts on the member 4, the outward movement and elongation of the seal member 4 are regulated by the outer wall surface 210c. Therefore, in the heavy object support device 1, since the volume change in the radial direction of the arrangement groove 210 of the filling space S is suppressed, the pressure of the liquid F is efficiently increased.

Further, the heavy object support device 1 is configured so that the pressure of the liquid F in the filling space S changes when the mounting table 2 comes into contact with and separates from the base 3 in the orthogonal direction. The pressure of the liquid F in the filling space S increases as it is placed on the mounting table 2, the heavy object O is removed from the mounting table 2, and the pressure of the liquid F in the filling space S decreases (returns to the original state). Therefore, the heavy object support device 1 is in a state where the liquid F in the filling space S exerts the pressure required to support the heavy object O, and the pressure required for the liquid F in the filling space S to support the heavy object O. It is possible to automatically switch between the state where the liquid F is not exhibited and the state where the liquid F is not exhibited without the need for external operations (supply of liquid F, recovery, etc.).

Then, in the heavy object support device 1, the liquid F for generating the pressure for supporting the heavy object O is defined by the space surrounded by the seal member 4 (the mounting base 2, the base 3, and the seal member 4). Since it is assembled in a state of being pre-sealed in the filled space S, it controls a device for supplying the liquid F from the outside into the filled space S and the flow of the liquid F supplied from the outside to the filled space S. There is no need for a device or the like for this purpose, and miniaturization and simplification can be achieved.

The heavy object support device 1 of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications are made without departing from the gist of the present invention.

In the above embodiment, the heavy object support device 1 includes one sealing member 4, but is not limited to this configuration. For example, the heavy object support device 1 includes a plurality of sealing members 4, and fills and seals each of the filling spaces S surrounded by the sealing members 4 between the mounting base 2 and the base 3 with the liquid F. May be good. That is, the heavy object support device 1 may include at least one seal member 4.

In the heavy object support device 1 shown in FIG. 7, a plurality of sealing members 4 are arranged between the single mounting base 2 and the single base 3, and between the mounting base 2 and the base 3. Each of the filling spaces S surrounded by each sealing member 4 is filled with the liquid F and is in a sealed state.

According to the heavy object support device 1, even if the load of the heavy object O is concentrated at a position deviated from the center of the mounting table 2, the mounting table 2 can be prevented from being tilted with respect to the base 3. When the heavy object support device 1 includes a plurality of seal members 4, it is preferable to make the distribution of each seal member 4 (that is, the distribution of each filling space S) uniform.

Although not particularly mentioned in the above embodiment, the heavy object support device 1 may be provided with, for example, a separation prevention structure 5 for preventing the mounting base 2 and the base 3 from being separated. As shown in FIGS. 8 and 9, for example, the separation prevention structure 5 includes a retaining portion 500 formed on the mounting table 2 and facing the side surface of the base 3, and a retaining portion 500 continuous with the corresponding stopping portion 500 and the base 3. The configuration may include at least one regulating portion 50 having a holding portion 501 facing the surface opposite to the sealing surface 30 of the above. The heavy object support device 1 shown in FIGS. 8 and 9 includes four regulation units 50.

The regulating portions 50 are arranged around the base 3 so that they are evenly spaced or substantially evenly spaced from each other.

The retaining portion 500 is provided on the base 3 within a range in which the filling space S composed of the seal member 4, the mounting base 2 and the base 3 can be maintained in close contact without being destroyed (without being opened). It is configured to allow the mounting table 2 to slide and rotate.

The holding portion 501 is configured to allow the mounting base 2 and the base 3 to come into contact with each other in the orthogonal direction within a range in which the mounting base 2 and the base 3 can be maintained in close contact with each other on the seal member 4. ing.

As described above, in the separation prevention structure 5, the mounting base 2 and the base 3 are brought into contact with each other in the orthogonal direction within the range in which the mounting base 2 and the base 3 are not released from the seal member 4, and the sliding. It is configured to allow relative movement between the mounting base 2 and the base 3 in the direction. Therefore, in the heavy object support device 1, the leakage of the liquid F from the filling space S is surely prevented, and the intrusion of air into the filling space S is also prevented.

Although not specifically mentioned in the above embodiment, the heavy object support device 1 may include a pressure control structure 6 for controlling the pressure of the liquid F in the filling space S.

As shown in FIGS. 10 and 11, for example, the pressure control structure 6 has a storage space 600 inside which is a space that communicates with the filling space S and is sealed in a state of being filled with the liquid F. The adjusting chamber 60 may be configured to allow pressure changes in the storage space 600.

More specifically, the pressure control structure 6 is a sealing member that seals between the movable wall portion 61 arranged in the adjusting chamber 60, the entire circumference of the movable wall portion 61, and the adjusting chamber 60. It may have 62 and an operation unit 63 for moving the movable wall portion 61 in the adjustment chamber 60.

In the heavy object support device 1 shown in FIGS. 10 and 11, the storage space 600 is formed by partitioning the inside of the adjusting chamber 60 by the movable wall portion 61 and the sealing member 62. Further, the storage space 600 communicates with the filling space S via a communication passage 64 formed in the mounting table 2.

Therefore, in the pressure control structure 6, when the movable wall portion 61 is moved by the operation portion 63 to expand the volume of the storage space 600 in the supported state, the pressure of the liquid F in the filling space S can be reduced and the storage space S can be stored. By narrowing the volume of the space 600, the pressure of the liquid F in the filling space S can be increased. Therefore, the pressure control structure 6 can adjust the pressure of the liquid F in the filling space S by changing the volume of the storage space 600 to change the amount of the liquid in the filling space S.

Further, in the heavy object support device 1 shown in FIGS. 10 and 11, the mounting table 2 and the base 3 can be brought into contact with each other by reducing the pressure of the liquid F in the filling space S in the supported state. It may be configured in. In this way, by bringing the mounting base 2 and the base 3 into contact with each other, the movement of the mounting base 2 and the heavy object O on the base 3 can be stopped (that is, the position can be fixed). it can).

In the above embodiment, the seal member 4 is arranged on the mounting table 2, but the present invention is not limited to this configuration. For example, the seal member 4 may be arranged on the base 3. That is, the seal member 4 may be arranged on either the mounting base 2 or the base 3.

In the above embodiment, the sealing member 4 is composed of the sealing ring 40 and the protective ring 41 as separate bodies, but the present invention is not limited to this configuration, and for example, the sealing ring 40 and the protective ring 41 May be integrated.

In the above embodiment, the arrangement groove 210 for arranging the seal member 4 is formed on the mounting table 2, but the present invention is not limited to this configuration. For example, the arrangement groove 210 may be formed in the base 3 so as to open toward the mounting base 2.

1 ... heavy load support device, 2 ... mounting base, 3 ... base, 4 ... sealing member, 5 ... separation prevention structure, 6 ... pressure control structure, 20 ... Mounting surface, 21 ... facing surface, 30 ... sealing surface, 40 ... sealing ring, 41 ... protection ring, 50 ... regulation part, 60 ... adjustment room, 61. .. Movable wall part, 62 ... Sealing member, 63 ... Operation part, 64 ... Communication passage, 210 ... Arrangement groove, 210a ... Bottom surface, 210b ... Inner wall surface, 210c. .. outer wall surface, 211 ... pressure receiving surface, 212 ... sliding surface, 300 ... sealing area, 301 ... inner pressure receiving area, 302 ... outer sliding area, 410 ... regulation part, 411 ... peripheral wall, 412 ... storage recess, 500 ... retaining part, 501 ... holding part, 600 ... storage space, D ... gap, F ... liquid, O .. Heavy objects, S ... filled space