JP2020127815A - Back pack tool - Google Patents

Abstract

To provide a back pack tool that does not obstruct a wearer from moving.SOLUTION: A back pack tool 300 fitted with a gas cylinder and shouldered by a wearer includes: a body fitted with a gas cylinder; and a regulator 450 in which a pressure reduction valve 460 fitted to the body and a pressure demand valve 400 are integrated together. The back pack tool can drain water 433 accumulated in the pressure demand valve 400 from a drain plug 430.SELECTED DRAWING: Figure 19

Description

The present disclosure relates to a backpack.

Firefighters perform rescue operations in dangerous places such as a scene of a fire. Therefore, firefighters should wear a respirator when performing rescue operations.

Regarding such a respirator, a positive pressure breathing apparatus is disclosed in US Pat. No. 5,001,741 (Patent Document 1).

U.S. Patent Specification No. 50000174

With the conventional respirator, a firefighter who is a wearer may have difficulty in operating.

According to one aspect, a backpack for a wearer, to which a cylinder is attached, carried by a wearer, comprising a main body and a regulator in which a pressure reducing valve and a pressure demand valve attached to the main body are integrated.

In the backpack thus configured, since the valve pressure valve and the pressure demand valve are provided in the main body, these valves are not attached to the belt or face piece arranged on the chest of the backpack of the wearer. As a result, the movement of the wearer is not hindered. Furthermore, since the pressure reducing valve and the pressure demand valve are integrally configured, they are not separated from each other, and the occurrence of failure can be suppressed. Furthermore, 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, the connection connector, the connection connector, the metal fitting for crimping the hose, and the hose are required to be stacked in length, so that the space becomes large, the mass increases, and the activity is impaired.

Preferably, the main body has an upper part located on the neck side of the wearer and a lower part 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 gathered in the lower part, the operation of the wearer is not hindered.

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 in the face piece and an air supply line for sending gas into the face piece 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 and external articles. As a result, the movement of the wearer is not hindered.

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 is rotatable 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.

The respirator includes any one of the above-described backpacks and a face piece to which gas is supplied from the backpacks and which covers the face of the wearer.

FIG. 3 is a perspective view of the face piece 11 according to the embodiment. FIG. 3 is a perspective view of a wearer 201 wearing the facepiece 11 and the backpack 300 according to the embodiment. FIG. 3 is a perspective view of a wearer 201 wearing the facepiece 11 and the backpack 300 according to the embodiment. FIG. 3 is a perspective view of rotation mechanism 100 and front plate 31 to which rotation mechanism 100 is attached according to the embodiment. FIG. 3 is a perspective view of rotation mechanism 100 according to the embodiment. It is sectional drawing which followed the VI-VI line in FIG. It is sectional drawing which followed the VII-VII line in FIG. FIG. 3 is an exploded perspective view of rotation mechanism 100 according to the embodiment. FIG. 3 is a perspective view of rotation mechanism 100 and front plate 31 to which rotation mechanism 100 is attached according to the embodiment. FIG. 3 is a perspective view of backpack 300 according to the embodiment. It is a figure showing the state where gas cylinder 250 was attached to backpack 300. It is a figure showing the state where gas cylinder 250 was attached to backpack 300. It is a figure showing the state where gas cylinder 250 was attached to backpack 300. It is a figure showing the state where gas cylinder 250 was attached to backpack 300. It is a figure which shows the air supply line 210 and the pressure detection line 220. FIG. 3 is a cross-sectional view of an air supply line 210 and a pressure detection line 220. It is a perspective view of backpack 300. FIG. 9 is a perspective view of the backpack 300 with the drain plug cover 380 removed. It is a perspective view which shows the internal structure of the backpack 300 in the state which removed the back plate 330b. It is a perspective view showing the internal structure of backpack 300 with drain plug 430 removed from case 401. It is a perspective view showing the internal structure of backpack 300 in the state where regulator 450 was removed from back plate 330b. FIG. 6 is a cross-sectional view showing internal structures of a pressure demand valve 400 and a pressure reducing valve 460. In the pressure demand valve 400, it is a cross-sectional view showing a state in which medium pressure air is flowing to an air supply port 423 according to a breathing volume. FIG. 23 is a cross-sectional view taken along the line XXIV-XXIV in FIG. 22. It is a figure of the wearer 201 in the state which lifted the dice 240.

Each embodiment according to the present invention will be described below 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 also the same. Therefore, detailed description thereof will not be repeated.

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

The face piece main body 21 includes a front plate 31 which is a colorless and transparent plate 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, from the wearer's face. And a support 32 that supports the support 32 with a proper space therebetween. The front plate 31 is a member also called an eyepiece.

Hereinafter, one surface of the front plate 31 in the thickness direction, which is the surface facing the wearer's face 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 part 36 arranged to face the upper half of the wearer's face in the worn state, and the lower end of the upper part 36, and extends to the lower half of the wearer's face. And a lower portion 37 arranged to face each other. The upper portion 36 and the lower portion 37 are formed so as to be bent and continuous. Specifically, the lower portion 37 is formed so as to be bent 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 smoothly curved shape so as to be convex in the direction away from the wearer's face in the worn state, between the left and right ends thereof. In addition, a through hole is formed in the lower portion 37 at a central portion between the left and right ends thereof so as to penetrate in the thickness direction.

At the center of the lower portion 37, a barrier holding portion to which one end of the barrier 33 is fixed is provided on the inner surface side thereof.

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

The 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 rotating mechanism 100 is connected to the front plate 31. The face piece 11 covers the face of the wearer. The face piece 11 is a front plate 31 which is a transparent plate-shaped member having a size capable of covering the wearer's face, and penetrates the front plate 31 on either the left or right side of the wearer and with respect to the front plate 31. And a rotatable rotating mechanism 100.

2 and 3 are perspective views of the wearer 201 wearing the facepiece 11 and the backpack 300 according to the embodiment. The wearer 201 is wearing the protective suit 200. The head of the wearer 201 is protected by the helmet 230, the face piece 11, and the dice 240. The wearer 201 carries the backpack 300. A gas cylinder 250 is attached to the backpack 300. No pressure demand valve is provided on the body front surface 241 or the face body 11 of the protective suit 200.

The backpack 300 extends from the upper portion 331 to the lower portion 332. A gas cylinder 250 having a shape extending from the upper portion 331 toward the lower portion 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 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 body 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 is continuously supplied to the face piece 11, so that the supplied gas is not used at all and is released to the atmosphere. 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 on the lower portion 332 of the backpack 300. The guard bar 306 protects the lower portion 332 of the backpack 300 and allows the backpack 300 to stand on the ground.

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

The main body lock 102 engages with the circular portion of the first main body 101. The body lock 102 is provided with notches 102a, 102b, 102c. The body lock 102 can rotate with respect to the front plate 31 together with the first 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. An engaging portion 118b provided at the tip of the leaf spring 118 is in contact with the main body lock 102. The pedestal 105 has an opening 105a.

A connector 109 is provided between the pedestal 105 and the 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. Thereby, the rotation of the body lock 102 can be stopped.

FIG. 5 is a perspective view of 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 sectional view taken along line VI-VI in FIG. As shown in FIG. 6, the second body 111 is fitted to the first body 101. The first 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 each have a cylindrical shape, and the internal spaces 111a and 111b thereof 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 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 opened in the internal space 101a of the first main body 101.

The tubular member 108 is held in the first main body 101. The overhanging portion 108c of the tubular member 108 is fitted into 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 periphery of the tubular portion 101c. The tubular member 108 is positioned within 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 body lock 102. The pedestal 105 is located below the flange portion 109f. The connector screw 106 is screwed into the end portion 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 connected to the annular portion 118a and engaging with the body lock 102. The leaf spring 118 is made of an elastic material.

The airtightness between the face piece 11 and the rotating mechanism 100 is established by the following structure.
Inner hoses 210a and 220a forming a part of a metal flexible 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 contraction of the rubber maintains the airtightness between the protrusions 111c and 111d and the inner hoses 210a and 220a.

The second body 111 is screwed to the first body 101 via the packing 111p. The first body 101 and the second 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 little friction in the outer diameter direction of the packing, and can rotate while maintaining the airtightness of the first main body 101 and the collar 121. Further, by attaching the main body screw 107 to the first main body 101 by screwing, 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 and airtightness is maintained.

FIG. 8 is an exploded perspective view of 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 body lock 102 is provided with a groove 102n extending in the circumferential direction. The claw portion 109t fits in the groove 102n. A stopper (not shown) is provided in the groove 102n, the circumferential end of the claw portion 109t abuts on the stopper, and the body lock 102 can rotate with respect to the claw portion 109t by a predetermined angle. is there. The rotating mechanism 100 is fixed to the face body 11 and has a pedestal 105 as a first member having an opening 105a, and is rotatable with respect to the pedestal 105 by being fitted into the opening 105a and penetrates the front plate 31 to pass gas. A tubular member 108 as a second member having a passage therethrough. The rotation mechanism 100 is fixed to a body lock 102 as a rotatable third member and a pedestal 105, and a leaf spring as a stop member capable of stopping the rotation of the body lock 102 by engaging with the body lock 102. And 118.

FIG. 9 is a perspective view of rotation mechanism 100 and front plate 31 to which rotation mechanism 100 is attached according to the embodiment. 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 within the front plate 31.

FIG. 10 is a perspective view of 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 upper portion 331 to the lower portion 332. The upper portion 331 is provided with a pair of belt holes 339. The upper part 331 is the upper half of the longitudinal direction, and the lower part 332 is the lower half of the longitudinal direction. That is, the main body 330 has an upper portion 331 located on the wearer's neck side and a lower portion 332 located on the wearer's waist side.

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 concave portion for passing the air supply line and the pressure detection line is exposed.

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

The pair of rod-shaped portions 304 and 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 inside the main body 330. By bending one rod, the rod-shaped portions 304 and 305 and the guard bar 306 are manufactured.

The main body 330 is provided with an overhanging portion 303. A belt hole 309 is formed in the overhang portion 303. The overhang portion 303 is provided on the upper side 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 the air supply line 210 and the pressure detection line 220. FIG. 16 is a 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 inner hoses 210a and 220a made of rubber and outer cases 210b and 220b that cover the inner hoses 210a and 220a. The outer cases 210b and 220b are flexible casing tubes, which are made of metal and can be bent. 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 330 b extends from the upper portion 331 to the lower portion 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 backboard 330b removed. As shown in FIG. 19, the adjuster 450 is housed in the front plate 330a. The regulator 450 has a pressure reducing valve 460 and a pressure demand valve 400. The pressure demand valve 400 is provided with a drain plug 430. 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 in the lower portion 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, an opening 431 is provided in the case 401. The drain plug 430 is provided in the circular opening 431 so that the drain plug 430 can be fitted therein.

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 portion 331 to the lower portion 332. An air supply line 210 and a pressure detection line 220 are arranged in the groove 330c. When water enters the pressure detection line 220, it becomes a dead end in the case 401, so that water easily collects in this portion. By providing the drain plug 430, the water 433 can be easily discharged.

FIG. 22 is a 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 body 413 has an inlet portion 418 and an air supply port 423 which is an outlet.

A pressure demand valve body 415 is fitted in the regulator body 413. The pressure demand valve body 415 cannot move relative to the regulator body 413. A shaft 417 is slidably fitted to the cylindrical portion of the pressure demand valve body 415.

The case 401 is in contact with the adjuster body 413. A diaphragm 403 is provided on the case 401. 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. At the pressure detecting port 402, a pressure measuring line 220
Has been inserted. A positive pressure lock shaft 410 is arranged in the case 401. A 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 atmospheric pressure to the face piece 11 in response to breathing. The pressure demand valve 400 realizes the function by the following structure.

Medium pressure (1 MPa or less) air flows from the inlet portion 418 of the regulator body 413 to the pressure demand valve body 415. The 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 inside of the pressure demand valve body 415, and a valve body 419 is connected to the shaft 417 by a nut 420. The valve body 419 is a composite material of metal and rubber. The valve spring 422 fixed by the spring bearing 421 presses the rubber portion of the valve body 419 against the seat surface of the pressure demand valve body 415, thereby stopping the flow of the medium pressure air. A U-seal 416 is attached to the shaft 417 to prevent the medium pressure air from flowing to the case 401 side.

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

The case 401 is connected to the face piece 11 through the pressure detection port 402, and the pressure fluctuation in the face piece 11 according to breathing is transmitted to the case 401. The diaphragm 403 is made of rubber and is sandwiched between the cover 404 and the case 401, and the air in 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 changes due to the breathing of the wearer 201. When the pressure of the case 401 fluctuates, the shape of 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 a rotation shaft 407. The rotating shaft 407 is fixed by a cap 426, and the cap 426 is connected to the pressure demand valve main body 415.

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

The pressure reducing valve 460 reduces the pressure of the high-pressure air having the pressure P1 into the medium-pressure air of 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. The spring 465 pushes the piston 463. If the pressure P2 on the pressure demand valve 400 side becomes smaller, the force by which the pressure P2 pushes the piston 463 becomes smaller, and the piston 463 moves from the position shown in FIG. 22 toward the shaft 417. As a result, the shaft 462 separates 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 portion 418 increases due to this air, the force of the pressure P2 pushing the piston 463 becomes stronger and the shaft 4
62 is pressed against the high pressure valve seat 461.

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

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

The air supply port 423 is connected to the face piece 11 by the air supply line 210. The pressure in the face piece 11 is changed by the air supplied to the face piece 11, and the changed pressure is detected by the pressure detection port 402 via the pressure detection line 220, and the diaphragm 403 moves due to this pressure change.

The positive pressure spring 406 fixed by the cover 404 applies a load according to the amount of compression to the diaphragm 403. The cover 404 has a hole for transmitting the atmosphere, and the atmospheric pressure is in the vicinity of 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.

24 is a sectional view taken along the line XXIV-XXIV in FIG. When the respirator is not used, the positive pressure lock shaft 410 is rotated. When the positive pressure lock shaft 410 is rotated in the direction shown by the arrow RS, the second auxiliary lever 409 rotates in conjunction with the positive pressure lock shaft 410 and the shaft 410s. Due to the rotation of the second auxiliary lever 409, the second auxiliary lever 409 pushes up the first auxiliary lever 408 and the projection 426a provided on the cap 426 rides on the first auxiliary lever 408 to fix the position of the first auxiliary lever 408. By being fixed, the force of the positive pressure spring 406 alone transmitted through the diaphragm 403 makes it impossible for the lever 405 to overcome the protrusion 426a of the cap 426 and return to the original position by the force of the positive pressure spring 406. Is fixed. Since the valve body 419 is not opened because the lever 405 is fixed, the air does not flow into the face piece 11 through the air supply port 423.

If 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 rides over the protrusion 426a of the cap 426 fixing the first auxiliary lever 408 and is fixed. Will be released.

FIG. 25 is a diagram of the wearer 201 in a state where the die 240 is lifted. 2 and 3, the rotation mechanism 100 did not appear because the roller 240 was lowered, but in FIG. 23, since the roller 240 was lifted, the rotation mechanism 100, the air supply line 210, and the pressure detection line 220 were exposed. 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 rotating mechanism 100 with respect to the face piece 11 is established as follows. First, the annular portion 118a of the leaf spring 118 is attached to the pedestal 105.

The pedestal 105 is fitted to the connector 109. When the body lock 102 is rotated, any one of the notches 102a, 102b, 102c of the body lock 102 and the engaging portion 1 of the leaf spring 118.
18b engages. This prevents the body lock 102 from rotating.

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

The respiratory device 1 has the following features.
The regulator 450, which is a component of the respirator 1, is placed on the backpack 300. As a result, compared with the case where the adjuster 450 is arranged on the front surface 241 of the wearer 201, the wearer 201 does not deviate from the position where the adjuster 450 is arranged during the activity.

In the backpack 300, the exposed portion of the arranged regulator 450 is covered with a front plate 330a as a separate component. In addition, a guard bar 306, which is a metal member that does not come into direct contact with the adjuster 450 and can stand on its own, is provided.

The regulator 450 includes a decompression unit (pressure reduction valve 460) for decompressing high-pressure air and a supply unit (pulmonary force valve (pressure demand valve 400)) for supplying the wearer with an appropriate amount of decompressed air according to the breathing volume. Has an integrated structure.

The air supply line 210 and the pressure detection line 220, which are hoses for breathing (respiratory hose) connecting the face piece 11 and the adjuster 450, are connected to the face piece 11 from behind the wearer without passing through the body front surface 241. To 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 corresponding to the movement of the neck expands and contracts in conjunction with the movement of the neck of the wearer 201.

The metal fitting (rotating mechanism 100) of the face piece 11, the air supply line 210, and the pressure detection line 220 should 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 device 1 is worn. It is a structure that can.

The hose connecting the respirator 1 and the high-pressure air container (gas cylinder 250) is different in size due to the eccentricity at the time of rotation by providing a multi-axis rotating shaft on the metal fitting for connecting the hose (hereinafter, high-pressure hose connecting metal fitting). The structure is such that it can be connected to a gas cylinder.

At the fire site, quick and safe activities are required due to activities in the hazardous area, but the smoke generated by the fire deteriorates visibility. If the field of vision at the feet is narrowed, it is difficult to perform quick and safe activities because there is a risk of falling at a site with steps. In this situation, if the regulator 450, the air supply line 210, and the pressure detection line 220 are provided on the front surface of the body, the downward view is narrowed by the components of the respirator 1. Since the respirator does not have the adjuster 450 on the front side of the body and the air supply line 210 and the pressure detection line 220 are connected to the face piece 11 from the rear side of the body, the field of view is not narrowed because there is no component that blocks the downward field of view.

When the respiratory device 1 is used for activities in a narrow space, there are situations in which it is necessary to perform actions such as becoming hungry, crouching, and holding a ladder. If the regulator 450, the air supply line 210, and the pressure detection line 220 are provided on the front surface 241 of the body, the activity is hindered due to the interference of the components.

The breathing apparatus 1 according to 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, so that the body can be more closely attached to the ground or the ladder, and the activity is improved.

The respirator 1 of the embodiment is provided with a part that covers the exposed portion of the adjuster 450 and a guard bar 306 that is a self-supporting metal fitting that does not directly contact the adjuster 450, and protects the adjuster 450 from the impact against a collision and a drop. It has a structure that

By integrating the regulator 450, the hose connecting the pressure reducing valve 460 and the pressure demand valve 400 (hereinafter, a medium pressure hose) is eliminated. 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 the left/right, up/down, and various postures. If the neck moves beyond the elasticity of the hose, the hose will be pulled due to the swing of the neck. Also, in the case of a design in which the hose is bent in consideration of neck movement, if the hose is excessively exposed on the front of the body, the hose may be caught during activity.

The respiratory apparatus 1 according to the first embodiment relaxes the stress on the neck by expanding and contracting the air supply line 210 and the pressure detection line 220 in accordance with the movement of the neck, and the air supply line 210 and the pressure detection line 220 are connected to each other. By storing it in the backpack 300, it is possible to suppress the exposure of the extra hose and improve the activity.

The rotation of the rotating mechanism 100 follows up, down, left, and right movements of the neck during wearing to reduce stress on the neck.

Further, although the respirator 1 is worn, when the face piece 11 is removed (standby state), when water enters the air supply line 210, the pressure detection line 220, and the adjuster 450 through the face piece due to support water discharge, etc. Corrosion and freezing at low temperatures may cause the respiratory device 1 to malfunction. By rotating the rotating mechanism 100, the face piece 11 can be rotated in the standby state in a direction in which water for the support discharge does not enter.

The gas cylinder 250 has a different internal volume and a different size of the container itself depending on the amount of air carried. On the other hand, the hose connected to the gas cylinder 250 generally has a multi-layer structure because it can withstand high-pressure air, and the hose itself has poor elasticity. Therefore, when connecting the hoses to the gas cylinders 250 having different sizes, it is necessary to provide the high-pressure hose connecting metal with a degree of freedom or adjust the position for fixing the gas cylinders 250 to the backpack. When the high-pressure hose connecting fitting is provided with a degree of freedom, when the high-pressure hose connecting fitting is slid to adjust the position, frictional force is received due to the mass of the parts and the configuration of the parts connected to the high-pressure hose fitting. Since the connection to the gas cylinder 250 is always performed when the respiratory apparatus 1 is used, repeated operations lead to stress on the wearer 201 and wear of the equipment.

Between the gas cylinder 250 and the pressure reducing valve 460, a high pressure hose connection fitting 310 is provided 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 fitting 310 is capable of rotating along multiple axes. By providing the high-pressure hose connecting fitting 310 with a multi-axis rotating shaft and connecting the same, the connectivity to the gas cylinder 250 is improved. In this embodiment, the high pressure hose connecting fitting 310 has three rotary shafts 311a, 312a, 313a, but it may have more or less rotary shafts.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

1 Respirator, 11-sided body, 21-sided body, 22 tightening cord, 31 front plate, 32 support, 33 barrier, 36,331 upper part, 37,332 lower part, 100 rotation mechanism, 101
First body, 101a, 111a, 111b internal space, 101c tubular portion, 102 body lock, 102a, 102b, 102c notch, 102n, 330c groove, 103 upper body cover, 104 lower body cover, 105 pedestal, 106 connector screw , 107
Main body screw, 108 tubular member, 108c, 303 overhanging portion, 109, 314 connector, 109f flange portion, 109t, 182 claw portion, 111 second main body, 111c, 111d protruding portion, 118 leaf spring, 118a annular portion, 118b Engagement part, 121 collar, 181 deflector, 200 protective clothing, 201 wearer, 210 air supply line, 210a, 220a inner hose, 210b, 220b outer case, 211, 212
Connector, 220 pressure detection line, 230 helmet, 240 skeleton, 241 body front face, 250 gas cylinder, 251 band, 300 backpack, 301 bypass valve switch, 302 positive pressure lock switch, 302a cover, 304, 305 rod portion, 306 guard bar, 307 stopper, 309, 339 belt hole, 310 high pressure hose connecting fitting, 311 first joint, 311a, 312a, 313a, 407 rotary shaft, 312 hose, 313 second joint, 320 valve, 322 threaded portion, 330 body, 330a
Front plate, 330b back plate, 335 lid, 380 drain plug cover, 400 pressure demand valve, 401 case, 402 pressure detecting port, 403 diaphragm, 404 cover, 405 lever, 406 positive pressure spring, 408 first auxiliary lever, 409 Second 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 part, 419 valve body, 420 nut, 422 valve spring, 423 air inlet, 426 cap, 430 drain plug, 431 opening, 433 water, 450 regulator, 460 pressure reducing valve.

Claims (5)

A backpack that the wearer can carry, with a gas cylinder attached,
A body to which the gas cylinder is attached,
A backpack equipped with a regulator in which a pressure reducing valve and a pressure demand valve attached to the main body are integrated. The main body has an upper part located on the neck side of the wearer and a lower part located on the waist side of the wearer, and the pressure reducing valve and the pressure demand valve are provided in the lower part of the main body. The backpack described. The main body is provided with a groove extending from the upper portion to the lower portion, and a pressure detection line for detecting the pressure in the face body and an air supply line for feeding gas into the face body are arranged in the groove. The backpack according to claim 2. A guide path for guiding the gas of the gas 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 is rotatable along a plurality of axes. The backpack according to any one of claims 1 to 3. A respirator, comprising: the backpack according to any one of claims 1 to 4, and a face body to which gas is supplied from the backpack to cover a wearer's face.