JP7439222B1 - respiratory system - Google Patents

Abstract

An object of the present invention is to provide a respiratory apparatus that does not hinder the movement of a wearer. A respiratory device that reduces the pressure of gas in a gas cylinder carried on the wearer's back and sends it to a face piece, which includes piping connected to the face piece, and the piping has an expandable part that can be expanded and contracted in the longitudinal direction. [Selection diagram] Figure 7

Description

TECHNICAL FIELD This disclosure relates to respiratory systems.

Firefighters carry out rescue operations in dangerous places such as fire sites. Therefore, firefighters wear respirators when conducting rescue operations.

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

JP2019-205784A

Conventional respirators can impede the wearer's movement.

According to one aspect, the respiratory apparatus reduces the pressure of gas in a gas cylinder carried on the wearer's back and sends it to the face piece, and includes piping connected to the face piece, and the piping has an expandable part that can be expanded and contracted in the longitudinal direction.

In the respiratory apparatus configured in this manner, the piping has an extensible portion that can be expanded and contracted in the longitudinal direction, so even if the required length of the piping changes, this amount of change can be absorbed by the extensible portion. As a result, even if the position of the face piece changes, the movement of the wearer will not be hindered.

Preferably, the extensible portion has a bellows-like portion. In this case, by employing the bellows-like portion, the expandable portion can be formed with a simple structure.

Preferably, the telescopic portion includes an inner hose provided within the bellows-like portion. In this case, the air flows through the inner hose within the expandable portion, so that the air flows smoothly within the expandable portion. Furthermore, since the stretchable part does not deform inwardly than the inner hose, it is possible to prevent the movement of the stretchable part from being hindered when it is deformed. While the bellows shape continues to fluctuate in cross-sectional area in the longitudinal direction, giving it elasticity, it poses a new problem: the air flowing inside loses energy due to friction between the hose wall and the flowing air. Unlike the elastic part, the inner hose has a straight structure that does not change its cross-sectional area, but since the inner hose cannot absorb changes due to expansion and contraction, when connected in parallel, the elasticity of the inner hose will affect the elasticity of the entire hose. Since this would impose restrictions, one end of the inner hose is not fixed to the face piece, so the structure is such that the inner hose is not affected by deformation of the expandable part.

Preferably, the piping is at least one of an air supply line and a pressure detection line. In this case, it is possible to prevent movement of the facepiece from being obstructed in either the air supply line or the pressure detection line.

FIG. 1 is a perspective view of a wearer 201 wearing a face piece 11 and a backpack carrier 300 according to the embodiment. FIG. 2 is a perspective view of a wearer 201 wearing the face piece 11 and the backpack carrier 300 according to the embodiment. FIG. 3 is a diagram of the wearer 201 with the shirt 240 lifted. FIG. 4 is a first perspective view of the backpack carrier 300 having the respiratory apparatus 400 according to the embodiment, viewed from the wearer 201 side. FIG. 5 is a second perspective view of the backpack carrier 300 having the respiratory apparatus 400 according to the embodiment, viewed from the wearer 201 side with the cover of the lower part 332 removed. FIG. 6 is a plan view of the expandable part 500 provided in the air supply line 210. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a perspective view of the telescopic section 500 in a contracted state. FIG. 9 is a perspective view including a partial cross section of the telescopic portion 500 in a contracted state. FIG. 10 is a perspective view including a partial cross section of the expandable portion 500 in an expanded state.

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 shirt 240 lifted.

It is a perspective view of a wearer 201 wearing the face piece 11 and the backpack implement 300 according to the embodiment as shown in FIGS. 1 to 3. A 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 shield 240. The wearer 201 is carrying the backpack 300 on his or her back. A gas cylinder 250 is attached to the backpack 300. No pressure demand valve is provided on the front surface 241 of the protective suit 200 or on the face piece 11.

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. The tip of the gas cylinder 250 is inserted between two rod-shaped parts 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 face piece 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, wasteful consumption of gas can be suppressed.

A guard bar is provided at the lower part 332 of the backpack carrier 300. The guard bar 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 when worn, it includes a facepiece main body 21 configured to cover the wearer's face, and a facepiece main body 21 fixed to the wearer's head. It is configured to include a tightening string 22 for tightening.

The facepiece 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 first perspective view of the backpack carrier 300 having the respiratory apparatus 400 according to the embodiment, viewed from the wearer 201 side. FIG. 5 is a second perspective view of the backpack carrier 300 having the respiratory apparatus 400 according to the embodiment, viewed from the wearer 201 side with the cover of the lower part 332 removed. FIG. 3 is a second perspective view of a backpack carrier 300 having a respiratory device 400 according to an embodiment, viewed from the side of a wearer 201.

As shown in FIGS. 4 and 5, the backpack carrier 300 has a main body 330.
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 gas cylinder 250. A lid 335 is provided between the cushions 307.

The main body 330 is provided with a connector 310 . The connector 310 is rotatably provided with respect to the 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. The display device 313 displays the remaining amount or residual pressure of air in the gas cylinder 250.

An air supply line 210 and a pressure detection line 220 are arranged between the two guide parts 351 and 352.

The pressure demand valve 380 has a function of supplying air at a pressure slightly higher than atmospheric pressure to the face piece 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 depending on the wearer's 201's breathing. 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 fluctuating 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 within the pressure demand valve 380 can be drained by opening the drain plug.

In FIGS. 1 and 2, the rotor 240 was lowered, so the rotation mechanism 100 did not appear; however, in FIG. 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. 6 is a plan view of the expandable part 500 provided in the air supply line 210. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.

In the air supply line 210, which is a hose that supplies air from the primary side (regulator side) (pressure demand valve 380 side) to the secondary side (face piece 11 side) of the respiratory apparatus 400, friction reduction and expansion/contraction between the inner and outer walls of the hose The stretchable part 500 has a double structure that has both properties. The expandable part 500 may be provided in the pressure detection line 220.

A bellows-shaped outer hose 530 is fixed to a primary outer hose connector 540 by a primary fixing member 520. A bellows-shaped outer hose 530 is fixed to the secondary outer hose connector 2101 by a secondary fixing member 510.

An inner hose 560 is inserted into the outer hose 530. The inner hose 560 is fixed to the inner hose connector 2102 on the primary side by a primary side fixture 520. The inner hose 560 is not fixed to the secondary outer hose connector 2101.

A groove is provided on the outer periphery of the primary outer hose connector 2102, and an O-ring 550 is fitted into the groove. The O-ring 550 can maintain airtightness between the primary outer hose connector 2102 and the outer hose 530.

The extendable part 500 is provided in either the air supply line 210 or the pressure detection line 220 between the backpack carrier 300 and the face piece 11. The expandable portion 500 may be provided in both the air supply line 210 and the pressure detection line 220. Piping constituting either the air supply line 210 or the pressure detection line 220 is connected to the secondary outside hose connector 2101 and the primary outside hose connector 2102.

FIG. 8 is a perspective view of the telescopic section 500 in a contracted state. FIG. 9 is a perspective view including a partial cross section of the telescopic portion 500 in a contracted state. FIG. 10 is a perspective view including a partial cross section of the expandable portion 500 in an expanded state.

By expanding and contracting the outer hose 530, even if the distance between the backpack carrier 300 and the face piece 11 changes, the air supply line 210 and the pressure detection line 220 do not hinder the movement of the backpack carrier 300 and the face piece 11. Since the inner hose 560 is provided within the outer hose 530, it is possible to prevent loss of energy due to friction between the bellows-shaped outer hose 530 and the inner wall surface of the hose or between air.

Although the inner hose 560 is fixed on the primary side in this embodiment, it may be free on the primary side and fixed on the secondary side.

The respirator in this embodiment is a so-called open type respirator. In the open type respirator, 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. Since the air within the face piece 11 is exhausted to the atmosphere, it 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 in 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.

That is, the expandable portion 500 can be provided in a portion of a gas circuit that circulates gas in a closed circuit. The outer hose 530 is made of rubber, for example. If it is to be used at high temperatures, it is preferably made of heat-resistant rubber.

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.

(Additional note 1)
A respiratory device 400 that reduces the pressure of gas in a gas cylinder 250 carried by a wearer 201 and sends it to the face piece 11, and includes an air supply line 210 or a pressure detection line 220 as piping connected to the face piece 11, The pressure detection line 220 of the respiratory apparatus 400 has an extensible section 500 that is expandable and retractable in the longitudinal direction.

(Additional note 2)
The respirator 400 according to appendix 1, wherein the extensible part 500 has an outer hose 530 as a bellows-shaped part.

(Additional note 3)
The respirator 400 according to appendix 2, wherein the expandable portion 500 has an inner hose 560 provided within the bellows-shaped portion.

(Additional note 4)
The respiratory apparatus 400 according to any one of Supplementary Notes 1 to 3, wherein the piping is at least either an air supply line or a pressure detection line.

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.

DESCRIPTION OF SYMBOLS 11 Face piece, 21 Face piece main body, 22 Tightening cord, 31 Front plate, 32 Support body, 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, 300 backpack, 301 bypass valve switch, 302 positive pressure lock switch, 303 overhang, 307 cushion, 309, 338, 339 belt hole, 310 connector, 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, 400 Respirator, 500 Expandable part, 510 Secondary fixing device, 520 Primary fixing device, 530 Outer hose, 540 Outer hose connector, 550 O-ring, 560 Inner hose, 2101 Secondary outer hose connector, 2102 Primary outer hose connector.

Claims (1)

A respiratory device that depressurizes the gas on the primary side of a gas cylinder provided on a backpack carried by the wearer and sends it to the secondary side of the mask, and includes piping that is connected to the mask, and that the piping is expandable and retractable in the longitudinal direction. the piping is at least one of an air supply line and a pressure detection line;
The extensible part includes an outer hose having a bellows shape and an inner hose inserted into the outer hose, the inner hose being fixed to a connector on the primary side, and the inner hose being connected to a connector on the secondary side. It is not fixed to the connector of
By expanding and contracting the outer hose, even if the distance between the backpack carrier and the face piece changes , at least one of the air supply line and the pressure detection line can prevent movement of the backpack carrier and the face piece. Since the inner hose is provided inside the outer hose, it is possible to prevent energy loss due to friction between the bellows-shaped outer hose and the inner wall surface of the hose and friction between air. vessel.

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