Backpack and respirator

TECHNICAL FIELD The present disclosure relates to backpacks and respirators.

Firefighters carry out rescue operations in dangerous places such as fire sites. For this reason, firefighters wear backpacks with breathing apparatus when conducting rescue operations.

Such a backpack implement is disclosed in, for example, Japanese Patent Application Publication No. 2019-205784 (Patent Document 1).

<p><patcit num="1"><text>Japanese Patent Application Publication No. 2019-205784</text></patcit></p>

<p>A problem with conventional knapsacks is that it is difficult to enter narrow vertical holes such as manholes.</p>

<p>According to one aspect, the backpack is carried on the wearer's back to which a gas cylinder is attached, and includes a main body to which the gas cylinder is attached, and an air supply line attached to the main body for sending gas from the gas cylinder to the wearer. The air supply line is configured to be bendable within the main body, and is used in a first use state in which gas is supplied to the wearer using the air supply line while the wearer is carrying a backpack, and It can be used in a second use state in which the air line is curved and the air supply line is used to supply gas to the wearer while the wearer is positioned under the backpack.</p><p>The backpack carrier configured in this manner is used in a second usage state in which the air supply line is curved and gas is supplied to the wearer using the air supply line while the wearer is positioned under the backpack carrier. It is possible. Therefore, when entering a narrow vertical hole such as a manhole, the wearer can enter the vertical hole by letting the wearer enter first and positioning the backpack so that it is positioned above the wearer.</p><p>Preferably, the backpack device further includes a pressure detection line that detects pressure fluctuations within the wearer's face, and the pressure detection line is configured to be curved within the main body, so that the backpack device can be carried on the wearer's back. The first usage state uses the pressure detection line to detect pressure fluctuations within the facepiece in a state where the pressure detection line is bent, and the first usage state uses the pressure detection line in a state where the wearer is located under the backpack with the pressure detection line curved. It can be used in a second state of use in which pressure fluctuations within the face piece are detected.</p><p>In this case, it is possible to provide a backpack with a respirator having a pressure detection line. It is possible to enter the vertical hole using the backpack.</p><p>Preferably, the main body has an upper part located on the wearer's neck side and a lower part located on the wearer's waist side, and the air supply line and the pressure detection line are bendable at the lower part.</p><p>In this case, since the air supply line and the pressure detection line can be bent at the lower part, they can be connected from the lower part to the wearer located below over a short distance.</p><p>A first protrusion having a first hole and a second protrusion having a second hole are provided on the upper part of the main body, and the first protrusion and the second protrusion are spaced apart from each other. The distance between the first protrusion and the second protrusion is smaller than the total width of the air supply line and the pressure detection line, and the transition from the first use state to the second use state is achieved. At times, the air supply line and the pressure detection line are passed through the gap between the first protrusion and the second protrusion, one by one, and curved downward.</p><p>In this case, the air supply line and pressure detection line are held in the first protrusion and the second protrusion in the first use state, and the air supply line and pressure detection line are taken out from the gap when transitioning to the second use state. Therefore, it is possible to reliably protect the air supply line and the pressure detection line in the first use state.</p><p>The respiratory apparatus includes one of the above-mentioned backpacks and a face piece that is supplied with gas from the backpack and covers the wearer's face.</p>

<figref num="1">FIG. 1 is a perspective view of a wearer 201 wearing a face piece 11 and a backpack carrier 300 according to the embodiment.</figref><figref num="2">FIG. 2 is a perspective view of a wearer 201 wearing the face piece 11 and the backpack carrier 300 according to the embodiment.</figref><figref num="3">FIG. 3 is a diagram of the wearer 201 with the Shikoro 240 lifted.</figref><figref num="4">FIG. 4 is a perspective view of the backpack carrier 300 according to the embodiment, as seen from the wearer 201 side, showing a first usage state.</figref><figref num="5">FIG. 5 is a perspective view of the backpack carrier 300 according to the embodiment, as seen from the wearer's 201 side, showing a second usage state.</figref><figref num="6">FIG. 6 is a front view of the backpack carrier 300 according to the embodiment, as seen from the gas cylinder 250 side with the cover of the lower part 332 removed, showing a second usage state.</figref><figref num="7">FIG. 7 is an enlarged front view showing the first protrusion 336 and the second protrusion 337 provided at the upper end of the backpack carrier 300 according to the embodiment.</figref><figref num="8">FIG. 8 is a diagram showing the arrangement of the backpack carrier 300 and the wearer 201 in the second usage state when entering the vertical hole 1000.</figref><figref num="9">FIG. 9 is a diagram showing the arrangement of the backpack carrier 300 and the wearer 201 in the first state of use when entering the vertical hole 1000.</figref>

Hereinafter, each embodiment according to the present invention will be described with reference to the drawings. In the following description, the same parts and components are given the same reference numerals. Their names and functions are also the same. Therefore, detailed explanations thereof will not be repeated.

1 and 2 are perspective views of a wearer 201 wearing a face piece 11 and a backpack carrier 300 according to the embodiment. FIG. 3 is a diagram of the wearer 201 with the Shikoro 240 lifted.

FIG. 3 is a perspective view of a wearer 201 wearing the facepiece 11 and the backpack carrier 300 according to the embodiment, as shown in FIGS. 1 to 3. FIG. Wearer 201 is wearing protective clothing 200. The head of the wearer 201 is protected by the helmet 230, the facepiece 11, and the Shikoro 240. Wearer 201 is carrying backpack 300. Gas cylinder 250 is attached to backpack 300. No pressure demand valve is provided on the front body 241 or face piece 11 of the protective suit 200.

The backpack carrier 300 extends from an upper portion 331 to a lower portion 332. A gas cylinder 250 having a shape extending from an upper part 331 toward a lower part 332 is fixed to the backpack carrier 300 by a band 251. The tip of the gas cylinder 250 is inserted between the two rod-shaped parts 304 and 305 of the backpack carrier 300. A breathing gas containing oxygen, such as air, is compressed and filled into the gas cylinder 250 as an intake gas at a pressure higher than atmospheric pressure.

A bypass valve switch 301 and a positive pressure lock switch 302 are provided at the lower part 332 of the backpack carrier 300. Bypass valve switch 301 is a switch for guiding high pressure gas discharged from gas cylinder 250 to face piece 11 without passing through the pressure demand valve.

The positive pressure lock switch 302 is for stopping the positive pressure supplied from the air supply line 210 to the facepiece 11. When the wearer 201 removes the face piece 11, the face piece 11 continues to be supplied with gas from the air supply line 210, so the supplied gas is not used at all and is released into the atmosphere. In order to prevent this, by operating the positive pressure lock switch 302 to cut off the supply of gas from the air supply line 210, it is possible to suppress wasteful consumption of gas.

A guard bar 306 is provided at the lower part 332 of the backpack carrier 300. The guard bar 306 protects the lower part 332 of the backpack carrier 300 and allows the backpack carrier 300 to stand on its own on the ground.

The facepiece 11 is used by being worn on the head of the human body, and in the wearing state, the facepiece main body 21 is configured to cover the wearer's face, and the facepiece main body 21 is fixed to the wearer's head. It is configured to include a tightening string 22 for tightening.

The face piece main body 21 includes a front plate 31, which is a colorless and transparent plate-like member having a size that can cover the face of a human body, and when worn, the front plate 31 is placed in front of the wearer's face and from the wearer's face. The support body 32 is supported at appropriate intervals. This front plate 31 is a member also called an eyepiece.

A rotation mechanism 100 is attached to the face piece 11. The rotation mechanism 100 is a member located between the air supply line 210, the pressure detection line 220, and the front plate 31. One end of the rotation mechanism 100 is connected to the air supply line 210 and the pressure detection line 220. The other side of the rotation mechanism 100 is connected to the front plate 31.

FIG. 4 is a perspective view of the backpack carrier 300 according to the embodiment, as seen from the wearer 201 side, showing a first usage state. FIG. 5 is a perspective view of the backpack carrier 300 according to the embodiment, as seen from the wearer's 201 side, showing a second usage state. FIG. 6 is a front view of the backpack carrier 300 according to the embodiment, as seen from the gas cylinder 250 side with the cover of the lower part 332 removed, showing a second usage state.

As shown in FIGS. 4 to 6, the backpack carrier 300 has a main body 330.

The body 330 extends longitudinally from an upper portion 331 to a lower portion 332. The upper portion 331 is provided with a pair of first protrusion 336 and second protrusion 337. A belt hole 338 is provided in the first protrusion 336. A belt hole 339 is provided in the second protrusion 337.

The upper part 331 refers to the upper half in the longitudinal direction, and the lower part 332 refers to the lower half in the longitudinal direction. That is, the main body 330 has an upper part 331 located on the wearer's neck side and a lower part 332 located on the wearer's waist side.

The main body 330 is provided with four cushions 307 for positioning the cylinder. A lid 335 is provided between the cushions 307.

The main body 330 is provided with a connector 310. Connector 310 is rotatably provided with respect to main body 330 around a rotation axis. A joint 315 and a connector 314 are provided at the tip of the connector 310. Connector 314 is connected to gas cylinder 250.

The main body 330 is provided with a projecting portion 303. A belt hole 309 is formed in the projecting portion 303. The projecting portion 303 is provided to cover the bypass valve switch 301 and the positive pressure lock switch 302.

A hose 312 is connected to the main body 330. A display device 313 is attached to the tip of the hose 312. Display device 313 displays the remaining amount or residual pressure of air in gas cylinder 250.

The difference between the backpack carrier 300 in the first usage state in FIG. 4 and the backpack carrier 300 in the second usage state in FIG. 5 is the position of the air supply line 210 and the pressure detection line 220. In the first usage state shown in FIG. 4, the air supply line 210 and the pressure detection line 220 are located between the first protrusion 336 and the second protrusion 337. In the second usage state shown in FIG. 5, the air supply line 210 and the pressure detection line 220 are not sandwiched between the first protrusion 336 and the second protrusion 337. As a result, in the second usage state shown in FIG. 5, the air supply line 210 and the pressure detection line 220 can be freely moved. Both the air supply line 210 and the pressure detection line 220 are made of materials that can accommodate such movements. Both the air supply line 210 and the pressure detection line 220 have flexibility. Further, the air supply line 210 and the pressure detection line 220 may be configured by connecting metal pipes with a universal joint.

The location where the air supply line 210 and the pressure detection line 220 are bent is preferably below two-thirds of the length from the top end to the bottom end of the main body 330. More preferably, the place where the air supply line 210 and the pressure detection line 220 bend is on the lower part 332 side than the boundary between the upper part 331 and the lower part 332. The boundary between the upper part 331 and the lower part 332 is the midpoint between the upper and lower ends of the main body.

In the first usage state, the air supply line 210 and the pressure detection line 220 are positioned between the pair of guide plates 351, 352, whereas in the second usage state, the air supply line 210 and the pressure detection line 220 are positioned between the pair of guide plates 351, 352. is not positioned between the pair of guide plates 351 and 352. In the first use state, the air supply line 210 and the pressure detection line 220 are located between the guide plates 351 and 352 on the side closer to the gas cylinder 250 than the first protrusion 336 and the second protrusion 337. On the other hand, in the second usage state, the portion located between the guide plates 351 and 352 in the first usage state has moved toward the wearer 201.

In the second usage state, the air supply line 210 and the pressure detection line 220 extend downward.

The pressure demand valve 380 has a function of supplying air at a pressure slightly higher than atmospheric pressure to the facepiece 11 in response to breathing.

Since the pressure demand valve 380 is connected to the facepiece 11 by the pressure detection line 220, the pressure inside the case of the pressure demand valve 380 fluctuates as the wearer 201 breathes. When the pressure in the case fluctuates, the diaphragm changes shape due to the pressure fluctuation. The air supply port of the pressure demand valve 380 is connected to the facepiece 11 through an air supply line 210. The pressure inside the face piece 11 fluctuates due to the air supplied to the face piece 11, and the fluctuated pressure is detected by the pressure detection port in the pressure demand valve 380 via the pressure detection line 220, and the diaphragm moves due to this pressure fluctuation. The main body 330 is provided with a drain plug. Water accumulated in the pressure demand valve 380 can be drained by opening the drain plug.

In Figures 1 and 2, the rotary mechanism 100 did not appear because the rotary mechanism 240 was lowered, but in Figure 3, the rotary mechanism 100, air supply line 210, and pressure detection line 220 were raised. be exposed. Air supply line 210 and pressure detection line 220 are preferably placed on the left side of wearer 201. This is because the wearer 201 carries a fire extinguishing hose on his right shoulder, and if the air supply line 210 and pressure detection line 220 are provided on the right side, they will interfere with the fire extinguishing hose.

FIG. 7 is an enlarged front view showing the first protrusion 336 and the second protrusion 337 provided at the upper end of the backpack carrier 300 according to the embodiment. As shown in FIG. 7, in the first use state, the air supply line 210 and the pressure detection line 220 are arranged in the space between the pair of guide plates 351, 352. In order to prevent the air supply line 210 and the pressure detection line 220 from shifting from this position, the distance W1 between the first protrusion 336 and the second protrusion 337 is equal to the width W2 of the air supply line 210 and the pressure detection line 220. It is preferable that the width W3 is smaller than the sum of the width W3.

FIG. 8 is a diagram showing the arrangement of the backpack carrier 300 and the wearer 201 in the second usage state when entering the vertical hole 1000. When entering the vertical hole 1000, the backpack 300 is removed from the wearer 201. Then, the backpack carrier 300 is put into a second use state. Pass the rope 1010 through the belt holes 338 and 339. Wearer 201 enters vertical hole 1000. The backpack carrier 300 is positioned above the wearer 201. The backpack 300 is suspended by a rope 1010. When the wearer 201 moves downward, the rope 1010 is sent out, thereby moving the backpack carrier 300 downward in accordance with the amount of downward movement of the wearer 201. As a result, the backpack carrier 300 can enter any vertical hole 1000 that has an inner diameter that allows the wearer 201 to enter.

FIG. 9 is a diagram showing the arrangement of the backpack carrier 300 and the wearer 201 in the first state of use when entering the vertical hole 1000. In the conventional backpack carrier 300, only the first usage state is allowed, and the second usage state as shown in FIG. 8 is not allowed. Therefore, when entering the vertical hole 1000, it was necessary to line up the wearer 201 and the backpack implement 300 in the horizontal direction. As a result, although it is possible to enter the vertical hole 1000 with a large inner diameter, it is not possible to enter the vertical hole 1000 with a small inner diameter.

The respirator in this embodiment is a so-called open type respirator. In the open type breathing apparatus, air in the gas cylinder 250 is supplied to the facepiece 11 via a pressure reducing valve, a pressure demand valve 380, or a demand valve. The air within the facepiece 11 is exhausted to the atmosphere and is not returned to the pressure demand valve 380. On the other hand, it is possible to apply the above configuration to a closed circulation type respirator. In closed circulation respirators, a closed circuit is provided. Therefore, the oxygen from gas cylinder 250 is supplied to the closed circuit via a pressure reducing valve and a demand valve. Gas is supplied from the closed circuit to the face piece 11, and gas is returned from the face piece 11 to the closed circuit. Carbon dioxide is absorbed from the returned gas by a carbon dioxide absorbent, and gas corresponding to the insufficient amount is supplied to the closed circuit.

Although this embodiment shows an example in which the air supply line 210 and the pressure detection line 220 are provided, it is sufficient that at least the air supply line 210 is provided, and the pressure detection line 220 does not necessarily need to be provided.

Supplementary Note 1 A backpack 300 carried by the wearer 201 to which a gas cylinder 250 is attached, comprising a main body 330 to which the gas cylinder 250 is attached, and a face piece attached to the main body 330 to carry gas from the gas cylinder 250 to the wearer 201. 11. The air supply line 210 is configured to be bendable within the main body 330, and gas is supplied to the wearer 201 using the air supply line 210 while the wearer 201 is carrying the backpack 300 on his or her back. a first use state, and a second state in which gas is supplied to the wearer 201 using the air supply line 210 with the air supply line 210 curved and the wearer 201 positioned under the backpack carrier 300; It can be used under the following conditions.

Supplementary Note 2 It further includes a pressure detection line 220 that detects pressure fluctuations within the facepiece 11 of the wearer 201, and the pressure detection line 220 is configured to be bendable within the main body 330, so that the wearer 201 can carry it on his or her back. the first usage state in which pressure fluctuations in the face piece 220 are detected using the pressure detection line 220 while carrying the device 300 on the back; and The backpack carrier 300 according to supplementary note 1, which can be used in a second usage state in which pressure fluctuations within the face piece 11 are detected using the pressure detection line 220 while the backpack carrier 300 is located below the face piece 300.

Additional Note 3 The main body 330 has an upper part 331 located on the neck side of the wearer 201 and a lower part 332 located on the waist side of the wearer 201, and the air supply line 210 and the pressure detection line 220 are connected to the lower part 332. The backpack according to appendix 2, which is bendable at .

Supplementary Note 4 The upper part 331 of the main body 330 is provided with a first protrusion 336 having a belt hole 338 as a first hole, and a second protrusion 337 having a belt hole 339 as a second hole. The first protrusion 336 and the second protrusion 337 are arranged at a distance from each other, and the distance W1 between the first protrusion 336 and the second protrusion 337 is equal to the distance W1 between the first protrusion 336 and the second protrusion 337. The first protrusion 336 and the second protrusion are smaller than the total width W2+W3 of the air line 210 and the pressure detection line 220, and when transitioning from the first use state to the second use state, the first protrusion 336 and the second protrusion 3. The backpack implement according to appendix 2 or 3, wherein each of the air supply line 210 and the pressure detection line 220 is curved downward by passing through the gap between the air supply line 210 and the pressure detection line 220.

Supplementary Note 5 A respiratory device comprising the backpack according to any one of Supplementary Notes 1 to 4, and a face piece that is supplied with gas from the backpack and covers the face of the wearer.

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that equivalent meanings and all changes within the scope of the claims are included.

11 Facepiece, 21 Facepiece main body, 22 Tightening strap, 31 Front plate, 32 Support, 100 Rotation mechanism, 200 Protective clothing, 201 Wearer, 210 Air supply line, 220 Pressure detection line, 230 Helmet, 240 Shikoro, 241 Front of body, 250 gas cylinder, 251 band, 300 backpack, 301 bypass valve switch, 302 positive pressure lock switch, 303 overhang, 304,305 bar, 306 guard bar, 307 cushion, 309,338,339 belt hole, 310 connection, 312 hose, 313 display device , 314 connector, 315 joint, 330 main body, 331 upper part, 332 lower part, 336 first protrusion, 337 second protrusion, 380 pressure demand valve, 1000 vertical hole, 1010 rope.