Backpack and respiratory apparatus

This disclosure relates to a backpack.

Firefighters carry out rescue operations in dangerous places such as the scene of a fire. Therefore, firefighters should wear a respiratory system when performing rescue operations.

Regarding such a respirator, US Pat. No. 5,0174 (Patent Document 1) discloses a positive pressure respirator.

<p><patcit num="1"><text>U.S. Patent Specification 5000174</text></patcit></p>

<p> With conventional respirators, the wearer, the firefighter, could have difficulty moving.</p>

<p> According to a certain aspect, it is a backpack carried by the wearer to which a cylinder is attached, and includes a regulator in which a main body and a pressure reducing valve and a pressure demand valve attached to the main body are integrated.</p><p> In the backpack configured in this way, since the valve pressure valve and the pressure demand valve are provided on the main body, these valves are not attached to the belt or facet arranged on the chest of the wearer's backpack. As a result, it does not interfere with the movement of the wearer. Further, since the pressure reducing valve and the pressure demand valve are integrally configured, they do not separate from each other, and the occurrence of failure can be suppressed. In addition, the regulator can be made compact. When the pressure reducing valve and the pressure demand valve are separated It is necessary to connect the pressure reducing valve and the pressure demand valve with a medium pressure hose. In that case, since the length of the connecting connector, the metal fitting for crimping the connecting connector, the hose, and the hose are required to be stacked, the space becomes large, the mass increases, and the activity is impaired.</p><p> Preferably, the body has an upper portion located on the neck side of the wearer and a lower portion located on the waist side of the wearer, and the pressure reducing valve and the pressure demand valve are provided on the lower part of the main body. In this case, since the pressure reducing valve and the pressure demand valve, which are heavy objects, are collected at the lower part, they do not interfere with the movement of the wearer.</p><p> Preferably, the main body is provided with a groove extending from the upper part to the lower part, and a pressure detection line for detecting the pressure inside the surface and an air supply line for sending gas into the surface are arranged in the groove. In this case, since the pressure detection line and the air supply line are provided in the groove, it is possible to prevent the pressure detection line and the intake line from coming into contact with the wearer or an external article. As a result, it does not interfere with the movement of the wearer.</p><p> Preferably, a guide path for guiding the gas of the cylinder from the outside of the main body to the inside of the main body is provided between the gas cylinder and the pressure reducing valve, and the guide path can rotate along a plurality of axes. In this case, since the guide path can rotate along a plurality of axes, it is possible to connect the gas cylinder and the guide path regardless of the size of the gas cylinder.</p><p> The respirator includes any of the above-mentioned backpacks and a face body to which gas is supplied from the backpack to cover the wearer's face.</p>

<figref num="1">It is a perspective view of the face piece 11 according to an embodiment.</figref><figref num="2">It is a perspective view of the wearer 201 wearing the face piece 11 and the backpack 300 according to the embodiment.</figref><figref num="3">It is a perspective view of the wearer 201 wearing the face piece 11 and the backpack 300 according to the embodiment.</figref><figref num="4">It is a perspective view of the front plate 31 to which the rotation mechanism 100 and the rotation mechanism 100 according to the embodiment are attached.</figref><figref num="5">It is a perspective view of the rotation mechanism 100 according to an embodiment.</figref><figref num="6">It is a cross-sectional view along the VI-VI line in FIG.</figref><figref num="7">It is sectional drawing along the line VII-VII in FIG.</figref><figref num="8">It is an exploded perspective view of the rotation mechanism 100 according to an embodiment.</figref><figref num="9">It is a perspective view of the front plate 31 to which the rotation mechanism 100 and the rotation mechanism 100 according to the embodiment are attached.</figref><figref num="10">It is a perspective view of the backpack 300 according to the embodiment.</figref><figref num="11">It is a figure which shows the state which the gas cylinder 250 is attached to the backpack 300.</figref><figref num="12">It is a figure which shows the state which the gas cylinder 250 is attached to the backpack 300.</figref><figref num="13">It is a figure which shows the state which the gas cylinder 250 is attached to the backpack 300.</figref><figref num="14">It is a figure which shows the state which the gas cylinder 250 is attached to the backpack 300.</figref><figref num="15">It is a figure which shows the air supply line 210 and the pressure detection line 220.</figref><figref num="16">It is sectional drawing of the air supply line 210 and the pressure detection line 220.</figref><figref num="17">It is a perspective view of the backpack 300.</figref><figref num="18">It is a perspective view of the backpack 300 with the drain plug cover 380 removed.</figref><figref num="19">It is a perspective view which shows the internal structure of the backpack 300 with the back plate 330b removed.</figref><figref num="20">It is a perspective view which shows the internal structure of the backpack 300 with the drain plug 430 removed from the case 401.</figref><figref num="21">It is a perspective view which shows the internal structure of the backpack 300 with the adjuster 450 removed from the back plate 330b.</figref><figref num="22">It is sectional drawing which shows the internal structure of a pressure demand valve 400 and a pressure reducing valve 460.</figref><figref num="23">FIG. 5 is a cross-sectional view showing a state in which medium pressure air is flowing to the air supply port 423 according to the amount of respiration in the pressure demand valve 400.</figref><figref num="24">It is sectional drawing along the arrow XXIV-XXIV line in FIG.</figref><figref num="25">It is a figure of the wearer 201 in a state where the shikoro 240 is lifted.</figref>

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the following description, the same parts and components are designated by the same reference numerals. Their names and functions are the same. Therefore, the detailed description of these will not be repeated.

FIG. 1 is a perspective view of the face piece 11 according to the embodiment. The face body 11 is used by being worn on the head of a human body, and in the worn state, the face body 21 configured to cover the face of the wearer and the face body 21 are fixed to the head of the wearer. It is configured to include a tightening cord 22 for the purpose of doing so.

The face body 21 has a front plate 31 which is a colorless and transparent plate-like member having a size capable of covering the face of the human body, and the front plate 31 in the worn state, in front of the wearer's face and from the wearer's face. It is composed of a support 32 that supports the support at an appropriate interval. The front plate 31 is a member also called an eyepiece.

Hereinafter, the surface of the front plate 31 in the thickness direction on the side facing the face of the wearer in the wearing state is referred to as an inner surface, and the surface opposite to the inner surface is referred to as an outer surface. And.

The front plate 31 is connected to the upper portion 36, which is arranged so as to roughly face the upper half of the wearer's face in the worn state, and the lower end portion of the upper portion 36, and is substantially connected to the lower half of the wearer's face. It has a lower portion 37 arranged to face each other. The upper part 36 and the lower part 37 are formed so as to be bent and connected. Specifically, the lower portion 37 is formed so as to bend toward the inner surface side with respect to the upper portion 36.

Both the upper part 36 and the lower part 37 are formed in a shape that is smoothly curved so as to be convex in the direction away from the wearer's face between the left and right ends thereof in the worn state. Further, in the lower portion 37, a through hole is formed in the central portion between the left and right end portions thereof so as to penetrate in the thickness direction.

In the central portion of the lower portion 37, an obstacle holding portion for fixing one end of the isolation 33 is provided on the inner surface side thereof.

The isolation 33 is an annular sealing member made of elastic soft rubber, one end of which is fixed to the isolation holding portion, and the other end of the wearer's nose from the upper part of the nose to both cheeks and the other end. It is formed to cover the wearer's mouth and nose by making elastic surface contact with the chin. In this way, in the worn state, an airtight respiratory chamber is formed by the barrier 33 and the wearer's face, and inspiratory gas is supplied to this respiratory chamber.

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 and 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. The face 11 covers the wearer's face. The face body 11 penetrates the front plate 31 which is a transparent plate-like member having a size capable of covering the face of the wearer, and the front plate 31 on either the left or right side of the wearer, and with respect to the front plate 31. It is equipped with a rotatable rotation mechanism 100.

2 and 3 are perspective views of the wearer 201 wearing the face piece 11 and the backpack 300 according to the embodiment. Wearer 201 is wearing protective clothing 200. The head of the wearer 201 is protected by a helmet 230, a face piece 11, and a shikoro 240. The wearer 201 carries a backpack 300 on his back. A gas cylinder 250 is attached to the backpack 300. The pressure demand valve is not provided on the front surface 241 or the surface 11 of the protective clothing 200.

The backpack 300 extends from the upper 331 to the lower 332. The gas cylinder 250, which extends from the upper part 331 to the lower part 332, is fixed to the backpack 300 by a band 251. The tip of the gas cylinder 250 is inserted between the two rod-shaped portions 304 and 305 of the backpack 300. For example, air, which is a breathing gas containing oxygen, is compressed and filled in the gas cylinder 250 as an intake gas at a pressure higher than the atmospheric pressure.

A bypass valve switch 301 and a positive pressure lock switch 302 are provided on the lower portion 332 of the backpack 300. The bypass valve switch 301 is a switch for guiding the high-pressure gas discharged from the gas cylinder 250 to the face piece 11 without passing through the pressure demand valve 400 and the pressure reducing valve 460.

The positive pressure lock switch 302 is for stopping the positive pressure supplied from the air supply line 210 to the face piece 11. When the wearer 201 removes the face piece 11, the gas from the air supply line 210 continues to be supplied to the facet 11, so that 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 300. The guard bar 306 protects the lower part 332 of the backpack 300 and allows the backpack 300 to stand on its own on the ground.

FIG. 4 is a perspective view of the rotation mechanism 100 and the front plate 31 to which the rotation mechanism 100 according to the embodiment is attached. As shown in FIG. 4, the rotation mechanism 100 has a first main body 101. The first main body 101 has a circular portion and a square portion. The upper main body cover 103 and the lower main body cover 104 are engaged with the square portion of the first main body 101.

The main body lock 102 engages with the circular portion of the first main body 101. The main body lock 102 is provided with notches 102a, 102b, 102c. The main body lock 102 can rotate with respect to the front plate 31 together with the first main body 101.

The pedestal 105 is provided so as to come into contact with the front plate 31. A leaf spring 118 is engaged with the pedestal 105. It is in contact with the engaging portion 118b main body lock 102 provided at the tip of the leaf spring 118. The pedestal 105 has an opening 105a.

A connector 109 is provided between the pedestal 105 and the main body lock 102. The pedestal 105 and the connector 109 do not rotate with respect to the front plate 31. When the body lock 102 is rotated, the leaf spring 118 fits into any of the notches 102a, 102b, 102c. As a result, the rotation of the main body lock 102 can be stopped.

FIG. 5 is a perspective view of the rotation mechanism 100 according to the embodiment. As shown in FIG. 5, the tubular member 108 is fitted to the first main body 101. Around the tubular member 108, there are a main body screw 107, a connector 109, and a connector screw 106. The pedestal 105 is attached to the connector 109.

FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. As shown in FIG. 6, the second main body 111 is fitted to the first main body 101. The first main body 101 is provided with an internal space 101a.

The second main body 111 is provided with protrusions 111c and 111d extending in parallel with each other. The protrusions 111c and 111d have a cylindrical shape, respectively, and the internal spaces 111a and 111b are provided so as to extend in the longitudinal direction. The internal spaces 111a and 111b communicate with the internal space 101a of the first main body 101.

FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. As shown in FIG. 7, the first main body 101 is sandwiched between the upper main body cover 103 and the lower main body cover 104. Circular internal spaces 111a and 111b are open in the internal space 101a of the first main body 101.

A tubular member 108 is held in the first main body 101. The overhanging portion 108c of the tubular member 108 is fitted to the tubular portion 101c of the first main body 101. The tubular member 108 has a hollow shape and is located near the rotation axis of the first main body 101.

The main body screw 107 is screwed onto the outer circumference of the tubular portion 101c. The tubular member 108 is positioned in the first main body 101 by sandwiching a part of the overhanging portion 108c between the main body screw 107 and the tubular portion 101c.

The main body lock 102 is provided on the outer peripheral side of the tubular portion 101c. A collar 121 and a connector 109 are arranged between the tubular portion 101c and the main body lock 102. The pedestal 105 is located below the flange portion 109f. The connector screw 106 is screwed onto the end of the connector 109. The front plate 31 is sandwiched between the connector screw 106 and the pedestal 105.

The leaf spring 118 has an annular portion 118a sandwiched between the connector 109 and the pedestal 105, and an engaging portion 118b that is connected to the annular portion 118a and engages with the main body lock 102. The leaf spring 118 is made of an elastic material.

The airtightness between the face piece 11 and the rotation mechanism 100 is established by the following structure. Inner hoses 210a and 220a, which form a part of a metal serpentine tube for pressure detection and air supply, are connected to the protrusions 111c and 111d of the second main body 111 shown in FIG. The inner hoses 210a and 220a are made of rubber, and the shrinkage of the rubber keeps the airtightness between the protrusions 111c and 111d and the inner hoses 210a and 220a.

The second main body 111 is screwed to the first main body 101 via the packing 111p. The first main body 101 and the second main body 111 are kept airtight by crushing the packing 111p.

As shown in FIG. 7, the Y packing 131 is in contact with the first main body 101 and the collar 121. The Y packing 131 has less friction with respect to the outer diameter direction of the packing, and can rotate while maintaining the airtightness between the first main body 101 and the collar 121. Further, by attaching the main body screw 107 to the first main body 101 by screw connection, the tubular member 108 is prevented from falling off from the first main body 101.

A packing 132 is provided between the collar 121 and the connector 109. Further, by rotating the main body lock 102, the collar 121 is pressed against the connector 109 via the packing 132 to maintain airtightness.

FIG. 8 is an exploded perspective view of the rotation mechanism 100 according to the embodiment. As shown in FIG. 8, the connector 109 is provided with a claw portion 109t extending in the circumferential direction. The main body lock 102 is provided with a groove 102n extending in the circumferential direction. The claw portion 109t fits in the groove 102n. The groove 102n is provided with a stopper (not shown), the circumferential end of the claw portion 109t hits the stopper, and the main body lock 102 can rotate by a predetermined angle with respect to the claw portion 109t. is there. The rotation mechanism 100 can rotate with respect to the pedestal 105 as a first member fixed to the face piece 11 and having the opening 105a, and the pedestal 105 by fitting into the opening 105a and passing gas through the front plate 31. It has a tubular member 108 as a second member having a passage path. The rotation mechanism 100 is fixed to the main body lock 102 as a rotatable third member and the leaf spring as a stop member which is fixed to the pedestal 105 and can stop the rotation of the main body lock 102 by engaging with the main body lock 102. Further equipped with 118.

FIG. 9 is a perspective view of the rotation mechanism 100 and the front plate 31 to which the rotation mechanism 100 according to the embodiment is attached. As shown in FIG. 9, the connector screw 106 is provided inside the front plate 31. The claw portion 182 of the deflector 181 is engaged with the connector screw 106. As a result, the deflector 181 is positioned in the front plate 31.

FIG. 10 is a perspective view of the backpack 300 according to the embodiment. As shown in FIG. 10, the backpack 300 has a main body 330. The main body 330 has a front plate 330a and a back plate 330b.

The body 330 extends longitudinally from the top 331 to the bottom 332. The upper portion 331 is provided with a pair of belt holes 339. The upper 331 refers to the upper half in the longitudinal direction, and the lower 332 refers to the lower half in the longitudinal direction. That is, the main body 330 has an upper portion 331 located on the neck side of the wearer and a lower portion 332 located on the waist side of the wearer.

The main body 330 is provided with four stoppers 307 for positioning the cylinder. A lid 335 is provided between the stoppers 307, and when the lid 335 is removed, a recess for passing the air supply line and the pressure detection line is exposed.

The main body 330 is provided with the first joint 311. The first joint 311 is rotatably provided with respect to the main body 330 with the rotation shaft 311a as the center of rotation. The hose 312 is connected to the first fitting 311. The hose 312 is rotatably provided with respect to the first joint 311 with the rotation shaft 312a as the center of rotation. The second fitting 313 is connected to the hose 312. The second joint 313 is rotatably provided with respect to the hose 312 with the rotation shaft 313a as the center of rotation. The connector 314 provided at the tip of the second joint 313 can be screwed into the threaded portion 322 of the valve 320.

The pair of rod-shaped portions 304, 305 extend in a direction away from the front plate 330a. The pair of rod-shaped portions 304 and 305 are connected to the guard bar 306 in the main body 330. By bending one rod, rod-shaped portions 304, 305 and guard bar 306 are manufactured.

The main body 330 is provided with an overhanging portion 303. A belt hole 309 is formed in the overhanging portion 303. The overhanging portion 303 is provided on the upper 331 side of the bypass valve switch 301 and the positive pressure lock switch 302.

FIG. 11 is a diagram showing a state in which the gas cylinder 250 is attached to the backpack 300. By rotating the first joint 311 as shown in FIG. 11, the position of the connector 314 in the longitudinal direction can be determined.

FIG. 12 is a diagram showing a state in which the gas cylinder 250 is attached to the backpack 300. By rotating the hose 312 as shown in FIG. 12, the position of the connector 314 in the height direction can be determined.

FIG. 13 is a diagram showing a state in which the gas cylinder 250 is attached to the backpack 300. As shown in FIG. 13, the angle of the connector 314 can be determined by rotating the second joint 313.

FIG. 14 is a diagram showing a state in which the gas cylinder 250 is attached to the backpack 300. As shown in FIG. 14, the valve 320 and the connector 314 can be connected by screwing the connector 314 into the valve 320.

FIG. 15 is a diagram showing an air supply line 210 and a pressure detection line 220. FIG. 16 is a cross-sectional view of the air supply line 210 and the pressure detection line 220. As shown in FIGS. 15 and 16, the air supply line 210 and the pressure detection line 220 have an inner hose 210a, 220a made of rubber and an outer case 210b, 220b covering the inner hose 210a, 220a. The outer cases 210b and 220b are flexible casing tubes, made of metal and bendable. As shown in FIG. 15, connectors 211 and 212 are provided at both ends of the air supply line 210 and the pressure detection line 220.

FIG. 17 is a perspective view of the backpack 300. As shown in FIG. 17, the back plate 330b extends from the upper 331 to the lower 332 of the backpack 300. A drain plug cover 380 is provided on the lower portion 332 of the back plate 330b. The cover 302a covers the positive pressure lock switch 302.

FIG. 18 is a perspective view of the backpack 300 with the drain plug cover 380 removed. When the drain plug cover 380 is removed from the back plate 330b as shown in FIG. 18, the drain plug 430 can be seen.

FIG. 19 is a perspective view showing the internal structure of the backpack 300 with the back plate 330b removed. As shown in FIG. 19, the adjuster 450 is housed in the front plate 330a. The regulator 450 is provided with a drain plug 430 in the pressure demand valve 400 having the pressure reducing valve 460 and the pressure demand valve 400. The water 433 accumulated in the pressure demand valve 400 can be discharged from the drain plug 430. The pressure reducing valve 460 and the pressure demand valve 400 are provided at the lower part 332 of the main body.

FIG. 20 is a perspective view showing the internal structure of the backpack 300 with the drain plug 430 removed from the case 401. As shown in FIG. 20, the case 401 is provided with an opening 431. A drain plug 430 is provided in the circular opening 431 so as to be fitted.

FIG. 21 is a perspective view showing the internal structure of the backpack 300 with the adjuster 450 removed from the back plate 330b. As shown in FIG. 21, the back plate 330b is provided with a groove 330c extending from the upper part 331 to the lower part 332. An air supply line 210 and a pressure detection line 220 are arranged in the groove 330c. If water enters the pressure detection line 220, it will be a dead end in case 401, so water tends to collect in this part. By providing the drain plug 430, it is possible to easily drain the water 433.

FIG. 22 is a cross-sectional view showing the internal structure of the pressure demand valve 400. As shown in FIG. 22, the pressure demand valve 400 has a regulator body 413. The regulator main body 413 has an inlet portion 418 and an outlet air supply port 423.

A pressure demand valve body 415 is fitted to the regulator body 413. The pressure demand valve body 415 cannot move with respect to the regulator body 413. A shaft 417 is slidably fitted to the tubular portion of the pressure demand valve body 415.

The case 401 is in contact with the regulator body 413. The case 401 is provided with a diaphragm 403. A positive pressure spring 406 is provided on one side of the diaphragm 403, and a lever 405 is provided on the other side.

The case 401 is provided with a pressure detection port 402. A pressure detection line 220 is inserted into the pressure detection port 402. A positive pressure lock shaft 410 is arranged in the case 401. The second auxiliary lever 409 is connected to the positive pressure lock shaft 410. The first auxiliary lever 408 is attached to the cap 426. The positive pressure lock shaft 410 is connected to the positive pressure lock switch 302.

The pressure demand valve 400 has a function of supplying air having a pressure slightly higher than the atmospheric pressure to the face piece 11 in response to respiration. The pressure demand valve 400 realizes this function by the following structure.

Medium pressure (1 MPa or less) air flows from the inlet 418 of the regulator body 413 to the pressure demand valve body 415. Medium pressure air is sealed between the pressure demand valve body 415 and the regulator body 413 by the first O-ring 412 and the second O-ring 414.

A shaft 417 passes through the pressure demand valve main body 415, and a valve body 419 is connected to the shaft 417 by a nut 420. The valve barrel 419 is a composite material of metal and rubber. The valve spring 422 fixed by the spring receiver 421 stops the flow of medium pressure air by pressing the rubber part of the valve body 419 against the seat surface of the pressure demand valve body 415. A U-seal 416 is attached to the shaft 417 to prevent medium pressure air from flowing to the case 401 side.

The case 401 and the pressure demand valve body 415 are connected, and an O-ring 411 is provided at the joint to prevent the pressure inside the case 401 from flowing to the atmosphere.

The case 401 is connected to the face piece 11 by the pressure detection port 402, and the pressure fluctuation in the face piece 11 in response to respiration is transmitted into the case 401. The diaphragm 403 is made of rubber and is sandwiched between the cover 404 and the case 401, so that the air inside the case 401 does not leak to the cover 404 side.

Since the case 401 is connected to the face piece 11 by the pressure detection line 220, the pressure inside the case 401 fluctuates due to the breathing of the wearer 201. When the pressure of the case 401 fluctuates, the diaphragm 403 is deformed due to the pressure fluctuation.

A lever 405 is connected to the diaphragm 403, and when the diaphragm 403 is deformed, the lever 405 rotates about the rotation shaft 407. The rotating shaft 407 is fixed by a cap 426, which is coupled to the pressure demand valve body 415.

The regulator main body 413 constitutes the case (main body) of the pressure reducing valve 460. As a result, the pressure demand valve 400 and the pressure reducing valve 460 are integrally formed with the regulator 450. In other words, the backpack 300 includes a regulator 450 in which a pressure reducing valve 460 and a pressure demand valve 400 attached to the main body 330 are integrated.

In the pressure reducing valve 460, the high pressure air at the pressure P1 is depressurized to be the medium pressure air at the pressure P2. A high-pressure valve seat 461 is embedded in the regulator body 413. The shaft 462 of the piston 463 is in contact with the high pressure valve seat 461. The piston 463 is housed in the decompression chamber 470. Spring 465 is pushing piston 463. When the pressure P2 on the pressure demand valve 400 side becomes smaller, the force with which the pressure P2 pushes the piston 463 becomes smaller, and the piston 463 moves in the direction approaching the shaft 417 from the position shown in FIG. As a result, the shaft 462 is separated from the high pressure valve seat 461, and air passes through the passage 464 provided in the shaft 462. When the pressure P2 of the inlet 418 increases due to this air, the force of the pressure P2 pushing the piston 463 becomes stronger and the shaft 462 is pressed against the high pressure valve seat 461.

An O-ring 466 is provided between the shaft 462 and the regulator body 413. An O-ring 467 is provided between the umbrella portion of the piston 463 and the regulator body 413. Airtightness is maintained by these O-rings 466,467.

FIG. 23 is a cross-sectional view showing a state in which medium pressure air is flowing to the air supply port 423 according to the amount of respiration in the pressure demand valve 400. As shown in FIG. 23, when the diaphragm 403 fluctuates due to respiration, the lever 405 rotates. The end 405c of the lever 405 pushes the end 417 of the shaft 417. The valve barrel 419 moves in conjunction with the shaft 417, creating a gap between the pressure demand valve body 415 and the valve barrel 419, and medium pressure air flows to the air supply port 423 according to the amount of breathing.

The air supply port 423 is connected to the face piece 11 by 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 fluctuating pressure is detected by the pressure detection port 402 via the pressure detection line 220, and the diaphragm 403 moves by this pressure fluctuation.

The positive pressure spring 406 fixed by the cover 404 applies a load to the diaphragm 403 according to the amount of compression. The cover 404 has a hole for transmitting the atmosphere, and the pressure is high near the positive pressure spring 406. Due to the load applied by the positive pressure spring 406, the pressure inside the case 401 becomes higher than the atmospheric pressure.

FIG. 24 is a cross-sectional view taken along the line XXIV-XXIV in FIG. When not using the respirator, rotate the positive pressure lock shaft 410. When the positive pressure lock shaft 410 is rotated in the direction indicated by the arrow RS, the second auxiliary lever 409 rotates in conjunction with the positive pressure lock shaft 410 and the shaft 410s. By the rotation of the second auxiliary lever 409, the second auxiliary lever 409 pushes up the first auxiliary lever 408, and the first auxiliary lever 408 rides on the protrusion 426a provided on the cap 426, and the position of the first auxiliary lever 408 is fixed. Due to the fixation, the lever 405 cannot return the first auxiliary lever 408 over the protrusion 426a of the cap 426 to its original position by the force of the positive pressure spring 406 transmitted through the diaphragm 403. Is fixed. Since the lever 405 is fixed, the valve barrel 419 does not open and air does not flow into the face piece 11 through the air supply port 423.

Further, when the pressure of the case 401 is lowered by intake air in this state, the force transmitted through the diaphragm 403 increases, and the first auxiliary lever 408 gets over the protrusion 426a of the cap 426 fixing the first auxiliary lever 408 and is fixed. It will be released.

FIG. 25 is a diagram of the wearer 201 with the shikoro 240 lifted. In FIGS. 2 and 3, the rotation mechanism 100 did not appear because the roller 240 was lowered, but in FIG. 23, the rotation mechanism 100, the air supply line 210, and the pressure detection line 220 were exposed because the roller 240 was lifted. To do. The air supply line 210 and the pressure detection line 220 are preferably arranged on the left side of the wearer 201. This is because the wearer 201 carries the fire extinguishing hose on the right shoulder, and if the air supply line 210 and the pressure detection line 220 are provided on the right side, the wearer 201 interferes with the fire extinguishing hose.

The structure for rotating and locking the rotation mechanism 100 with respect to the face piece 11 is as follows. First, the annular portion 118a of the leaf spring 118 is attached to the pedestal 105.

Fit the pedestal 105 to the connector 109. When the main body lock 102 is rotated, any of the notches 102a, 102b, 102c of the main body lock 102 is engaged with the engaging portion 118b of the leaf spring 118. As a result, the main body lock 102 does not rotate.

In order to rotate the main body lock 102, the engaging portion 118b is pushed down toward the pedestal 105. As a result, the engagement between the engaging portion 118b and any of the notches 102a, 102b, 102c is released. As a result, the main body lock 102 can be rotated.

Respiratory 1 has the following characteristics. The adjuster 450, which is a component of the respirator 1, is placed on the backpack 300. As a result, the structure is such that the adjuster 450 does not deviate from the position where the adjuster 450 is arranged during the activity, as compared with the case where the adjuster 450 is arranged on the front surface 241 of the wearer 201.

In the backpack 300, the exposed portion of the arranged adjuster 450 is covered with a front plate 330a as a separate part. In addition, a guard bar 306, which is a self-supporting metal fitting that does not come into direct contact with the adjuster 450, is provided.

The regulator 450 has a pressure reducing unit (pressure reducing valve 460) that depressurizes high-pressure air and a supply unit (lung force valve (pressure demand valve 400)) that supplies decompressed air to the wearer in an appropriate amount according to the amount of respiration. Has an integrated structure.

The air supply line 210 and the pressure detection line 220, which are the breathing hoses (breathing hoses) that connect the face piece 11 and the regulator 450, have a structure that connects to the face piece 11 from the rear of the wearer without passing through the front surface 241 of the body. Will be done.

The air supply line 210 and the pressure detection line 220 are partially housed in the backpack 300. The structure is such that the distance of movement of the neck expands and contracts in conjunction with the movement of the neck of the wearer 201.

The connection fitting (rotation mechanism 100) between the face piece 11 and the air supply line 210 and the pressure detection line 220 shall rotate with respect to the face piece 11 while maintaining the protection state from the outside air inside the face piece 11 when the respiratory organ 1 is worn. It is a structure that can be used.

The hose that connects the respirator 1 and the high-pressure air container (gas cylinder 250) has a multi-axis rotating shaft provided on the metal fitting that connects the hose (hereinafter referred to as the high-pressure hose connecting metal fitting), and the size varies depending on the eccentricity during rotation. The structure should be able to connect to a gas cylinder.

At the fire site, quick and safe activities are required for activities in dangerous areas, but the smoke generated by the fire impairs visibility. If the field of vision at your feet is narrowed, it is difficult to carry out quick and safe activities because there is a risk of falling on a site with steps. In this situation, if there is a regulator 450, an air supply line 210 and a pressure detection line 220 on the front of the body, the components of the respiratory organ 1 narrow the view below. In this respirator, there is no regulator 450 on the front surface of the body, and the air supply line 210 and the pressure detection line 220 are connected to the face body 11 from the rear of the body, so that the field of view is not narrowed because there are no components that block the lower field of view.

When using the respiratory system 1 for activities in a narrow space, there are situations in which movements such as crawling, crouching, and holding a ladder are required. If the regulator 450, the air supply line 210, and the pressure detection line 220 are located on the front surface 241 of the body, the activity is hindered due to the interference of the components.

Since the respiratory organ 1 of the embodiment does not have the regulator 450, the air supply line 210, and the pressure detection line 220 on the front surface of the body, the body can be brought into close contact with the ground or the ladder, and the activity is improved.

The respirator 1 of the embodiment is provided with a component covering the exposed portion of the regulator 450 and a guard bar 306 which is a self-supporting metal fitting that does not come into direct contact with the regulator 450 to protect the regulator 450 from impacts against collisions and drops. It has a structure to be used.

By integrating the regulator 450, the hose connecting the pressure reducing valve 460 and the pressure demand valve 400 (hereinafter referred to as the medium pressure hose) has disappeared. Since the medium pressure hose is made of rubber, it deteriorates over time, but maintenance is improved by eliminating the hose. In addition, the regulator 450 is downsized by eliminating the medium pressure hose.

The wearer 201 moves his / her neck when checking left / right or up / down, or in various postures. If the neck moves beyond the elasticity of the hose, the hose will be pulled against the swing of the neck. Also, in the case of a design in which the hose is bent assuming the movement of the neck, if there is an extra exposed hose on the front of the body, the hose may be caught during activity.

In the respirator 1 of the first embodiment, the air supply line 210 and the pressure detection line 220 expand and contract according to the movement of the neck to relieve stress on the neck, and the air supply line 210 and the pressure detection line 220 are provided. By storing it in the backpack 300, the exposure of the excess hose is suppressed and the activity is improved.

By rotating the rotation mechanism 100, the stress on the neck is relieved by following the vertical and horizontal movements of the neck when wearing.

In addition, although the respirator 1 is worn, when the facet 11 is removed (standby state) and water invades the air supply line 210, the pressure detection line 220, and the regulator 450 through the facepiece due to support water discharge or the like, the parts are replaced. Corrosion and freezing at low temperatures may cause respiratory failure. By rotating the rotation mechanism 100, the face piece 11 can be rotated in a direction in which the support water does not enter in the standby state.

The internal volume of the gas cylinder 250 differs depending on the amount of air carried, and the size of the container itself differs. On the other hand, the hose connected to the gas cylinder 250 generally has a multi-layer structure in order to withstand high pressure air, and the hose itself is inferior in elasticity. Therefore, when connecting a hose to gas cylinders 250 of different sizes, it is necessary to provide a degree of freedom in the high-pressure hose connection fitting or adjust the position for fixing the gas cylinder 250 to the backpack. When the high-pressure hose connection fitting is provided with a degree of freedom, when the high-pressure hose connection fitting is slid to adjust the position, frictional force is received depending on the mass of the parts and the configuration of the parts connected to the high-pressure hose connection fitting. Since the connection to the gas cylinder 250 is always made when using the respirator 1, repeated movements lead to stress on the wearer 201 and wear on the equipment.

A high-pressure hose connection fitting 310 is provided between the gas cylinder 250 and the pressure reducing valve 460 as a guide path for guiding the gas of the gas cylinder 250 from the outside of the main body 330 to the inside of the main body 330. The high pressure hose connection fitting 310 has a first joint 311, a hose 312, and a second joint 313. The high pressure hose connection fitting 310 can rotate along a plurality of axes. By providing a multi-axis rotating shaft on the high-pressure hose connecting bracket 310 and connecting it, the connectivity to the gas cylinder 250 is improved. In this embodiment, the high pressure hose connection fitting 310 has three rotating shafts 311a, 312a, 313a, but may have more or less rotating shafts.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Respirator, 11-sided body, 21-sided body, 22 tightening cord, 31 front plate, 32 support, 33 connector, 36,331 upper part, 37,332 lower part, 100 rotation mechanism, 101 first body, 101a, 111a, 111b internal space, 101c tubular part, 102 body lock, 102a, 102b, 102c notch, 102n, 330c groove, 103 upper body cover, 104 lower body cover, 105 pedestal, 106 connector screw, 107 body screw, 108 tubular member, 108c, 303 overhang, 109,314 connector, 109f flange, 109t, 182 claw, 111 second body, 111c, 111d protrusion, 118 leaf spring, 118a annular, 118b engaging, 121 collar, 181 deflector, 200 protection Clothes, 201 wearer, 210 air supply line, 210a, 220a inner hose, 210b, 220b outer case, 211,212 connector, 220 pressure detection line, 230 helmet, 240 screws, 241 front body, 250 Gas bomb, 251 band, 300 backpack, 301 bypass valve switch, 302 positive pressure lock switch, 302a cover, 304,305 rod, 306 guard bar, 307 stopper, 309,339 belt hole, 310 high pressure hose fitting, 311 first fitting, 311a, 312a, 313a, 407 Rotating shaft, 312 hose, 313 second fitting, 320 valve, 322 threaded part, 330 body, 330a front plate, 330b back plate, 335 lid, 380 drain plug cover, 400 pressure demand valve, 401 Case, 402 Pressure detection port, 403 diaphragm, 404 cover, 405 lever, 406 positive pressure spring, 408 1st auxiliary lever, 409 2nd auxiliary lever, 410 positive pressure lock shaft, 411,412,414 ring, 413 regulator body, 415 pressure demand Valve body, 416 seal, 417 shaft, 418 inlet, 419 valve barrel, 420 nut, 422 valve spring, 423 air supply port, 426 cap, 430 drain plug, 431 opening, 433 Water, 450 regulator, 460 pressure reducing valve.