JP3123689B2 - Semi-closed breathing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-closed breathing apparatus for underwater or land use, and more particularly to a semi-closed breathing apparatus for diving and fire fighting. The present invention also relates to an underwater or land-based type in which a gas for intake from a compressed air cylinder or an oxygen cylinder is mixed with a user's breath, and carbon dioxide is absorbed from the mixed gas and returned to the user as a gas for intake. In particular, the present invention relates to a respiratory device for diving and firefighting.

[0002]

2. Description of the Related Art Underwater or land-based respirators are broadly classified into open respirators, semi-closed respirators and closed respirators. The open-type breathing apparatus uses, for example, a compressed air cylinder as a breathing gas source , and all exhalation is discharged into water or the like.When used for long-time diving, the capacity of the cylinder is increased. Have to do
There is a problem that the weight increases.

On the other hand, the semi-closed breathing apparatus, for example, expiratory flow path for connecting the expiratory side of the mouthpiece, the breathing gas supply passage for connecting the call 吸Ga scan source, intake flow to be connected to the intake side of the mouthpiece An airbag or breathing bag provided with a passage and an exhaust valve, a carbon dioxide absorbing device provided in an expiratory flow path, a breathing gas cylinder connected to a breathing gas supply flow path, and absorbing and removing carbon dioxide from breathing gas circulating in a breathing circuit Then, a small amount of new breathing gas is mixed with the breathing gas from which carbon dioxide has been absorbed and removed, introduced into the breathing bag, and excess breathing gas is discharged from the exhaust valve. Has the same configuration as the above-mentioned semi-closed respiratory apparatus, but is not provided with an exhaust valve so as not to discharge excess respiratory gas to the outside.

[0004]

In such a closed or semi-closed breathing apparatus, the breathing bag is formed by bellows or the like so as to be inflatable and compressible.
In the case where the breathing bag is attached to the back, for example, if the diver is standing upright in the water, normal breathing is possible, but the water pressure applied to the breathing bag and the lungs of the diver If there is a difference between the applied water pressure, the difference in water pressure acts to inflate or deflate the breathing bag. Therefore, when a diver maintains a prone position, the pressure is lower than that of the lungs.
When the force decreases, the breathing bag expands, and when maintaining the supine position, the pressure increases as compared to the lungs, so that the breathing bag contracts and the volume decreases. Therefore, the diver must stand up between the prone position and the supine position.
The pressure applied to the lungs and the breathing bag is different from the posture
In both supine and prone positions
However, they also feel suffocating, which is a problem.

In a semi-closed diving respiratory apparatus, a mouthpiece is ingested by ingesting a mouthpiece. However, since the inside of the mouthpiece circuit is at the same pressure as the external pressure when inhaling, In general, it is unavoidable that water enters the mouthpiece unit. When the water that has entered the mouthpiece enters the carbon dioxide gas absorbing device from the mouthpiece unit, it reacts with the carbon dioxide gas absorbent to generate strong alkaline water or reduce the function of absorbing carbon dioxide gas. This is a problem.

Therefore, conventionally, in order to drain the water that has entered the mouthpiece unit, the water intrusion prevention valve provided in the mouthpiece unit has been manually opened to discharge water together with exhalation. It is necessary to master the handling of the inundation prevention valve in this drainage work,
When handling the immersion prevention valve, there is a problem that the immersion prevention valve does not work when the mouthpiece is detached against the intention of the diver, and there is a danger of infiltration into the breathing circuit through the expiratory tube. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to attach a carbon dioxide gas absorbing or adsorbing device to the outside of a breathing bag and use the device as a weight to lie down. In the case of the posture and the case of the supine posture,
It is an object of the present invention to provide a semi-closed breathing apparatus, particularly a diving semi-closed breathing apparatus, in which the pressure fluctuation in the breathing bag is reduced so that the breathing action can be performed in substantially the same state.

Another object of the present invention is to supply a relatively high pressure breathing gas from a cylinder into a mouthpiece unit by a simple operation, and to remove water retained in the mouthpiece unit by the pressure of the breathing gas. It is an object of the present invention to provide a semi-closed breathing apparatus for draining water, in particular, a diving and fire-fighting semi-closed breathing apparatus.

Further, according to the present invention, the water in the breathing bag is forcibly sucked into the pump by the suction and discharge action of the pump in the breathing bag, and discharged into the water collecting chamber located below the pump. The present invention relates to a semi-closed breathing apparatus for opening a check valve and forcibly discharging the water from a water collection chamber, and more particularly to a semi-closed breathing apparatus for diving and fire fighting.

[0010]

That is, the present invention provides a mouthpiece unit, a breathing bag connected to an intake passage of the mouthpiece unit, connected to an expiration passage of the mouthpiece unit, and further provided with an exhaust valve. And a pressurized breathing gas tank connected to the breathing bag, and a semi-closed breathing apparatus including a carbon dioxide gas absorbing device, wherein the breathing bag includes a lower support plate and an intermediate plate, and a bellows is provided between the lower support plate and the intermediate plate. And a breathing gas supply hole connected to the breathing gas supply control valve is provided. The auxiliary breathing bag includes the intermediate plate and the top plate, and a bellows is provided between the intermediate plate and the top plate. surrounded by, in the relative call吸袋
A pressurized respiratory gas supply pipe adjacent to the intervening plate and connected to the respiratory gas supply control valve is inserted and formed, and the lower support plate is provided with an expiratory flow from the respiratory chamber of the mouthpiece unit. Along with an exhalation opening connected to a road, a drainage port is provided, the intermediate plate is provided with an exhalation opening, and the top plate is formed with a protrusion toward the intermediate plate. In the breathing bag, a tubular bellows provided with an end plate fixed to the intermediate plate and provided toward the drain port of the lower support plate is provided when the breathing bag is inflated. , A length that forms a narrow gap around the open end of the cylindrical bellows and the drainage port of the lower support plate, and a water collection chamber is formed below the drainage port and has a bottom portion. Equipped with a drainage outlet with a check valve , In the assisted breathing bag, a flow path for the exhaled air, is formed by sealing enclosure by bellows between the front Symbol opening for exhaled gas inlet and the intermediate plate of carbon dioxide absorber, The control valve for supplying breathing gas provided in the auxiliary breathing bag includes a control arm having a length capable of contacting the protrusion of the top plate when the auxiliary breathing bag is compressed, and the control valve includes: When the contact with the protruding portion of the top plate, the opening operation of the control valve for breathing gas supply is performed, and the carbon dioxide gas absorption device provided on the top plate is formed to act as a counterweight. A semi-closed respirator.

The present invention also provides a mouthpiece unit,
A breathing bag connected to the inhalation flow passage of the mouthpiece unit and also connected to the expiration flow passage of the mouthpiece unit, and further provided with an exhaust valve, a pressurized breathing gas tank connected to the breathing bag, and a carbon dioxide absorption device In the semi-closed breathing apparatus, the breathing bag includes a lower support plate and an intermediate plate, and a space between the lower support plate and the intermediate plate is surrounded by a bellows,
And it is formed by providing a breathing gas supply hole connected to the breathing gas supply control valve, and the auxiliary breathing bag includes the intermediate plate and the top plate, and a space between the intermediate plate and the top plate is surrounded by a bellows. , to call吸袋next to between the intermediate plate
Fit, is formed and pressurized breathing gas supply pipe which connects to the breathing gas supply control valve is inserted, the lower support plate, the intake passage and expiratory flow path from the breathing chamber of the mouthpiece unit, In addition to having an opening for inspiration and an opening for expiration to be connected to each other, and having a drain port, the intermediate plate has an opening for inspiration and an opening for expiration, and the top plate has A protruding portion is formed toward the intermediate plate, and a carbon dioxide gas absorbing device is attached, and within the breathing bag, the opening for intake of the lower support plate and the opening for intake of the intermediate plate are different. A flow path for intake is formed by being hermetically enclosed by the bellows, and in the breathing bag, an end plate is fixed to the intermediate plate and a cylindrical bellows provided toward the drain port of the lower support plate is provided. , When the breathing bag is inflated, It is provided with a length that forms a narrow gap around the open end of the cylindrical bellows and the drain port of the lower support plate, and a water collection chamber is formed below the drain port, and at the bottom thereof. equipped with a drainage outlet with a check valve, in the assisted breathing bag, a flow path for the exhaled breath, bellows and an opening of the front Symbol for exhaled gas inlet and the intermediate plate of carbon dioxide absorber The control valve for supplying respiratory gas provided in the auxiliary breathing bag has a length capable of contacting with the protrusion of the top plate when the auxiliary breathing bag is compressed. Arm is provided, and the control valve performs an opening operation of the respiratory gas supply control valve when the control valve comes into contact with the protruding portion of the top plate, and the carbon dioxide gas absorbing device provided on the top plate To act as a counterweight In semi-closed breathing apparatus, characterized by being made.

Further, according to the present invention, the mouthpiece unit is connected to an intake passage of the mouthpiece unit, is connected to an expiration passage of the mouthpiece unit, is further connected to a breathing bag provided with an exhaust valve, and is connected to a breathing bag. In a semi-closed breathing apparatus including a pressurized breathing gas tank and a carbon dioxide absorbing device, the breathing bag includes a lower support plate and an intermediate plate, a space between the lower support plate and the intermediate plate surrounded by a bellows, and a breathing gas. It is formed by providing a breathing gas supply hole passage that connects the supply control valve, the auxiliary breathing bag is provided with the intermediate plate and the top plate, the intermediate plate and top plates surrounded by the bellows, respiration With the intermediate plate between the bags
A pressurized respiratory gas supply pipe adjacent to and connected to the respiratory gas supply control valve is inserted and formed, and the lower support plate is connected to an inhalation flow path and an expiration flow path from a respiratory chamber of a mouthpiece unit. , Having an opening for inspiration and an opening for expiration to be connected to each other, as well as a drain port,
The intermediate plate has an opening for inhalation and an opening for expiration, and the top plate has a projection formed toward the intermediate plate, and a carbon dioxide absorbing device is attached thereto, and the breathing bag is provided. Inside, the opening for intake of the lower support plate and the opening for intake of the intermediate plate are hermetically enclosed by a bellows to form a flow path for intake, and within the breathing bag, An end plate is fixed to the plate, and a tubular bellows provided toward the drain port of the lower support plate is provided, when the breathing bag is inflated, between the open end of the tubular bellows and the drain port of the lower support plate. The auxiliary breathing bag is provided with a length that forms a narrow gap around it, a water collection chamber is formed below the drainage port, and has a drainage outlet having a check valve at the bottom thereof. in the inner flow path for the exhaled breath, before SL carbon dioxide gas The gas inlet of the absorber and the opening for expiration of the intermediate plate are formed by hermetically surrounding the bellows, and the control valve for supplying breathing gas provided in the auxiliary breathing bag is configured such that the auxiliary breathing bag is compressed. When
A control arm having a length capable of contacting the protrusion of the top plate is provided, and the control valve performs an opening operation of the respiratory gas supply control valve when the control arm contacts the protrusion of the top plate. Yes, the carbon dioxide absorption device provided on the top plate,
The breathing chamber of the mouthpiece unit is formed so as to act as a counterweight, and the breathing chamber of the mouthpiece unit is connected to the breathing opening and the breathing opening of the lower support plate of the breathing bag, respectively. And a breathing gas inlet provided with a demand lever is provided in proximity to the breathing outlet, and an exhaust / drain outlet provided with a check valve is formed at the bottom of the breathing chamber. The valve for controlling the opening and closing of the expiratory outlet has a valve stem extending across the breathing chamber to the expiratory outlet, and the tip of the valve stem can be in liquid-tight contact with the expiratory outlet. A semi-closed respiratory apparatus having a valve body and a projection formed in an intermediate portion of a valve stem so as to be able to contact the demand lever.

[0013] The semi-closed breathing apparatus of the present invention is used while being carried on the back of a user. In the semi-closed breathing apparatus according to the present invention, the carbon dioxide gas absorbing apparatus is attached to the stretchable side of the breathing bag. Therefore, when the user uses the semi-closed respirator on his / her back and takes a supine position, the carbon dioxide absorbing device of the semi-closed respirator becomes lower than the position of the user's lungs, and The ambient pressure at the bag location is slightly higher than the internal pressure of the lungs, so the breathing bag will be compressed, but the weight of the carbon dioxide absorber will act to inflate the breathing bag, so The internal pressure can be maintained at the same level as the internal pressure. Further, when the user takes a lying posture, becomes the position of the user's lungs is lower than the breathing bag, the internal pressure of the lung size no longer than around pressure to the position of the call 吸袋, breathing bag you expansion However, since the breathing bag is compressed by the weight of the carbon dioxide gas absorbing device, the internal pressure can be maintained at the same level as the internal pressure of the lung. Therefore, for example, the diver can perform the same respiratory action regardless of the posture in the water.

As described above, according to the present invention, the weight of the carbon dioxide gas absorbing device is against the ambient pressure acting to expand or compress the breathing bag, and the breathing bag and the auxiliary breathing bag Due to the weight of the gas absorber, the internal pressure is approximately the same as the internal pressure of the lungs, and is approximately equal to the pressure and volume in the standing posture.
Will be maintained.

In the present invention, the breathing bag is provided adjacent to an auxiliary breathing bag provided with a carbon dioxide absorbing device via an intermediate plate, and both are surrounded by a bellows so as to be able to expand and contract. In the present invention, the breathing bag, at all times, cormorants complement the breathing gas
The eyes, the respiratory gas from the high pressure breathing gas tank, mixed exhalation from the mouthpiece unit, to send the carbon dioxide absorber, the intermediate plate, mixed expiratory mixed opening for gas of the breathing gas and exhalation Is formed in the lower support plate, and an exhalation introduction opening and a breathing gas introduction opening which are respectively opened in the breathing bag chamber are formed. Therefore, in the present invention, an expandable and contractible intake flow path surrounded by bellows is formed in the breathing bag so that the inhaled air does not mix with the exhaled gas mixture in the breathing bag .

In the present invention, the auxiliary breathing bag is formed of carbon dioxide gas.
Is extremely inappropriate amount of breathing gas which flows into the intake passage from the absorber
When feet are formed so as to supply a high-pressure breathing gas, also the carbon dioxide gas in the respiratory gas absorbs removed, in order to feed the inlet, the carbon dioxide-absorbing device is provided on the top plate . Therefore, in the auxiliary breathing bag,
In order to prevent the mixed gas and the inspired gas from absorbing and removing carbon dioxide gas from mixing, the opening for the gas mixture in the intermediate plate and the gas inlet of the carbon dioxide gas absorption device are connected to each other, and the gas mixture is extensible and expandable surrounded by bellows. A channel is formed.

In the present invention, the carbon dioxide gas absorbing device means a carbon dioxide gas absorbing device and a carbon dioxide gas adsorbing device, and the carbon dioxide gas absorbent means a substance absorbing carbon dioxide gas and a substance absorbing carbon dioxide gas. In the present invention, carbon dioxide absorption
The device absorbs or adsorbs carbon dioxide contained in exhaled breath
To be removed and filled with carbon dioxide absorbent.
You.

In the present invention, when the auxiliary breathing bag is compressed and the volume of the auxiliary breathing bag decreases and the amount of the breathing gas decreases, the supplementary breathing gas is supplemented and the volume of the auxiliary breathing bag is increased. In order to make it easier for the user to breathe, the auxiliary breathing bag has a projection formed on the top plate, and a breathing gas supply pipe connected to the high pressure breathing gas flow path via a breathing gas control valve having an opening / closing arm. Road is inserted. Therefore, according to the present invention, when the auxiliary breathing bag is compressed by water pressure or the like and the volume of the auxiliary breathing bag is reduced, the opening / closing arm comes into contact with the projection and is pushed, so that the control valve for breathing gas is released. When opened, high-pressure breathing gas is supplied into the auxiliary breathing bag, which can supplement the breathing gas and increase the volume of the auxiliary breathing bag.

In the present invention, the gas inlet and the gas outlet of the carbon dioxide gas absorbing device are provided so as to prevent water vapor and water entering the breathing bag from entering the carbon dioxide gas absorbing device.
It is preferable that the intermediate plate is provided so as to protrude inward from the top plate, and that the weir plate is provided on the intermediate plate so as to surround the openings for the expiration gas mixture, that is, for expiration, and the intake gas, that is, for intake . Further, the end plate is fixed to the intermediate plate, the bellows <br/>'s that Ru extending upward side of the water outlet from the end plate is provided, the pumping action due to the expansion and contraction of the bellows, collected in the water collecting chamber water Can be discharged out of the breathing bag from an outlet provided with a check valve.

In the present invention, the breathing chamber of the mouthpiece unit is connected to an expiratory flow path and an inspiratory flow path connected to a breathing bag, and the expiratory port connected to the expiratory flow path is
A non-return valve is provided for a check valve that flows through an expiration flow path without back flow of expiration. Is provided, whereby the inflow of inhalation into the mouthpiece unit and the exhalation of expiration from the mouthpiece unit can be performed smoothly.

In the present invention, the breathing chamber of the mouthpiece unit is provided with an exhaust port and a drain port provided with a drainage mechanism so that water vapor and / or water flowing in during breathing can be discharged. In the present invention, the water vapor and / or water flowing in during respiration mainly adheres and accumulates on the side of the respiratory chamber of the mouthpiece unit opposite to the side on which the mouthpiece is located, and these water vapor and / or water are exhaled. In order to minimize intrusion into the flow path, the breathing chamber of the mouthpiece unit is provided with an exhaust / drain port provided with a check valve at a location where water vapor and / or water accumulates. The exhaust / drain check valve can be opened by increasing the pressure in the breathing chamber, thereby draining the mouthpiece unit's breathing chamber.

In the present invention, in order to increase the pressure in the breathing chamber of the mouthpiece unit, for example, a pressurized breathing gas adjusted from a pressurized breathing gas tank to a predetermined pressure is supplied to the breathing chamber so that the gas can be sent into the breathing chamber. A breathing gas supply passage from the breathing gas tank is connected to a breathing gas supply port of the breathing chamber. Exhalation valve, which is configured to open when the pressure in the breathing chamber of the mouthpiece unit is increased, in the present invention, the pressure in the breathing chamber is increased by the breathing gas from the breathing gas supply flow path Sometimes, an exhalation opening / closing valve for opening and closing the exhalation opening is provided separately from the exhalation valve so that the exhalation valve does not open.

[0023] Accordingly, in the present invention, the opening of the connection port of the breathing gas supply channel, in order to carry out simultaneously with the closing of the exhalation port by the exhalation opening and closing valve, the opening and closing of the exhalation opening and closing valve, the respiratory A protrusion is formed on the valve stem of the exhalation opening / closing valve so that the opening / closing operation of the opening / closing valve of the gas supply passage connection port can be performed. Opening and closing of the breathing gas supply passage connecting port of the on-off valve is to allow the reciprocating movement of the valve stem, wherein the breathing gas supply passage connecting port of the on-off valve, the demand lever is provided. The demand lever is formed, for example, in a substantially acute L-shape, and the L-shaped bent portion is rotatably attached to the mouthpiece unit wall by a shaft. When the valve stem operates to close the expiration opening / closing valve, the lever portion of the demand lever is pushed in contact with the projection formed on the valve stem, and the valve body of the opening / closing valve at the connection port is pressed. Move in the direction away from the connection port.

[0024]

According to the present invention, a breathing bag and an auxiliary breathing bag are provided, an intake passage is formed by a bellows in the breathing bag, a breathing gas introduction passage is inserted, and a bellows bag is formed as a pump for performing suction and discharge operations. And form a water collection chamber below it,
On the other hand, in the auxiliary breathing bag, an expiration flow path is formed by a bellows, a carbon dioxide gas absorbing device is provided on the top plate of the auxiliary breathing bag, also serving as a counterweight, and the breathing gas is brought into contact with a projection provided on the top plate. Since the high pressure breathing gas supply path to supply is inserted, in the breathing bag, the breathing gas can be mixed with the breath,
In addition, the water in the breathing bag is pumped by the bellows bag ,
Can be extruded positively out of the call吸袋, can prevent a decrease in capacity of the carbon dioxide absorber can be used carbon dioxide absorber over a relatively long period of time.

In the present invention, the carbon dioxide gas absorbing device is also used as a counterweight. Therefore, when the respiratory device is used on a back, the carbon dioxide gas absorbing device functions as a counterweight even if the user takes a supine position during use. Therefore, the breathing bag can be suppressed from being compressed by ambient pressure,
Not lead to the, also take the lying posture, the carbon dioxide-absorbing devices, because they act to compress the breathing bag, it does not lead to lead to significant degradation of the pressure. Therefore, according to the present invention, breathing does not become difficult even if the posture changes, such as the supine posture or the prone posture.

Further, in the present invention, an exhaust port and a drain port provided with a check valve are formed on the opposite side of the mouthpiece of the breathing chamber of the mouthpiece unit, so that the exhaust port and the discharge port of the breathing chamber are close to each other. A high-pressure respiratory gas inlet is formed, and a protrusion provided on the valve stem of the on-off valve at the exhalation outlet controls the on-off valve of the respiratory gas inlet, so that the water vapor in the exhaled gas discharged into the mouthpiece unit is discharged. By operating the valve stem of the on-off valve of the exhalation-air outlet to open the breathing gas inlet and increase the pressure in the mouthpiece unit breathing chamber, the water entering the mouthpiece during the breathing operation can be used as the exhaust port. The check valve at the drain can be opened to push water vapor and water out of the mouthpiece unit.

Therefore, according to the present invention, the water vapor and water present in the breathing chamber of the mouthpiece unit can be removed by operating the valve stem of the on-off valve at the expiration outlet at appropriate intervals. possible to reduce the water vapor and water contained in the breath to be delivered to the breathing bag and the auxiliary breathing bag from the absorption capacity of the carbon dioxide absorber by steam or water low
Bottom can be prevented.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited by the following description and examples. FIG. 1 is a sectional view schematically illustrating an embodiment of the present invention. FIG. 2 is an enlarged partial sectional view schematically illustrating a breathing bag and an auxiliary breathing bag according to the embodiment of FIG. and 4, respectively, Ru partially enlarged sectional view showing the outline of different operating aspects of the mouthpiece unit in the embodiment shown in FIG.

In the example shown in FIG.
Is configured to be mounted on the back portion of the diver,
Breathing gas tank 2, airbag 3, auxiliary airbag 4
And a mouthpiece unit 5. In this example, the gas tank 2 for breathing, the airbag 3 and the auxiliary airbag 4 are mounted in a casing formed by a mounting substrate 6 and a cover 7 covering the substrate 6.

In this embodiment, the airbag 3 and the auxiliary airbag 4 are formed with an intermediate support plate 8 therebetween. The airbag 3 is formed by surrounding a bottom plate 9 and a support plate 8 located above the bottom plate 9 with a first bellows 10, and the auxiliary airbag 4 includes an intermediate support plate 8 and the intermediate support plate 8. The second bellows 12 surrounds the space between the top plates 11 located above the upper surface 8. In this example, the top plate 11
Is provided with a carbon dioxide gas absorbing device 13 which is also used as a counterweight.

In this embodiment, the respiratory gas tank 2 is a respiratory gas cylinder for oxygen, compressed air, or the like, and is detachably attached to the mounting substrate 6. Respiratory gas pipe 14 connected to the breathing gas cylinder 2 is connected to a pressure reducer 15 having a plurality of flow paths are branched, a first flow path 16 of the pressure reducer 15, for example, a flexible pipe, It is connected to a weighing device 17.

In the present embodiment, the weighing device 17 is provided with a residual pressure gauge 18 and a depth gauge 19 so that a diver can view it at any time.
A weighing device with is used. However, the depth gauge may include a depth alarm that issues an alarm when the depth becomes too deep. In this embodiment, any weighing device can be used as long as the weighing device has a residual pressure gauge and a depth gauge. In this embodiment, a conventionally known weighing device is used.

The second flow path 20 of the decompressor 15 is connected to the airbag 3 through a filter 21, a flow control valve 22 for adjusting the flow rate of breathing gas, and a breathing gas supply nozzle 24 connected by a pipe joint 23. Connected. In this example, the respiratory gas supply nozzle 24 is provided so that water accumulated in the airbag 3 does not enter the respiratory gas supply nozzle 24.
Preferably, it is formed so as to protrude into the airbag 3. The third flow path 25 of the pressure reducer 15 is
It is connected via the ejection-off valve 26 of the flow control valve. The The ejection <br/> off valve 26, in contact with the projection 27 provided downward in the top plate 11, Ri Contact provided with a control arm 28 for opening and closing the said discharge-off valve 26 , Remaining fourth flow path 29
Is a breathing gas supply pipe to the mouthpiece unit 5 and is connected to the breathing chamber 30 of the mouthpiece unit 5.

As shown in detail in FIG. 2, in the present embodiment, the airbag 3 is provided with an intake outlet 31 and an exhalation inlet 32 on the bottom plate 9, and furthermore, a bottom portion of a concave portion 33 of the bottom plate 9. Is formed with a drain outlet 34. Above the drain outlet 34 of the recess 33 is provided a bellows pump 35 whose upper end is fixedly sealed to an end plate 35 '. The lower end of the bellows pump 35 is fixed to the bottom plate 9 of the concave portion 33 at an appropriate position. Below the bellows pump 35, an annular upper plate member 36 and an annular lower plate member 37 made of rubber are provided. In this example, the upper plate member 36 and the lower plate member 37 made of rubber, to form a liter up valves of the check valve.

In the present embodiment, the bellows pump 35 has an end plate 35 ′ fixed to the intermediate support plate 8 of the airbag 3.
Since the upper end is fixed to the bottom plate 9 and the lower end is fixed to the bottom plate 9 of the recessed portion 33, it contracts with the contraction of the breathing bag when the user inhales, and expands with the expansion of the breathing bag when exhaling. The rubber annular plate members 36 and 37 at the lower end of the bellows pump 35 form a gap between the annular plate members 36 and 37 when the bellows pump 35 expands, so that the recessed portion 33 is formed.
When the bellows pump 35 contracts, the annular plate members 36 and 37 come into close contact with each other to seal the gap between the annular plate members 36 and 37, and water is discharged from the drain outlet 34 into the concave portion 33. Water collection chamber 38 formed below
Spill into. The water collection chamber 38 has a bottom 39
The check valve 40 water outlet 41 is formed with a by pressure during contraction of the bellows pump, water check valve 40 is opened water collecting chamber 3 within 8 is discharged to the outside.

In this embodiment, a tubular bellows 43 is provided between the intake outlet 31 of the bottom plate 9 and the intake outlet 42 formed in the intermediate support plate 8 so that the intake air and the exhaled air do not mix in the airbag 3. Sealed connection. In addition, a weir 44 is formed around the intake outlet 42 of the intermediate support plate 8 so that water accumulated in the auxiliary airbag does not enter the tubular bellows 43 for exhalation. An exhalation inlet hole 45 is formed in the intermediate support plate 8, and the exhalation inlet hole 45 and the gas inlet 46 of the carbon dioxide gas absorbing device 13 are hermetically connected by a tubular bellows 47.

In this embodiment, for example, when the user takes a prone position, the airbag 3
A weir 48 is formed around the airbag 3 side of the exhalation inlet hole 45 of the intermediate support plate 8 so as to protrude into the airbag 3 so as to prevent water from entering therein. The gas outlet side 49 of the thirteen protrudes inward from the inner surface of the top plate 11. Therefore, the exhaled gas that has entered the gas inlet 46 of the carbon dioxide gas absorbing device 13 flows from the carbon dioxide gas inlet channel to the absorption chamber 5 provided therearound.
And flows out of the gas outlet 49.

As shown in detail in FIGS. 3 and 4, the breathing chamber 30 of the mouthpiece unit 5 is
1 and an inhalation inlet 54 with a check valve 53. The exhalation outlet 5
2 is an exhalation inlet hole 3 of the airbag 3 through the exhalation tube 55.
2 and the inlet port 54 of the mouthpiece unit 5
Are connected to the intake outlet 31 of the airbag 3 via the intake pipe 56.

In this embodiment, the breathing chamber 30 of the mouthpiece unit 5 has the mouthpiece 5
And an exhaust / drain port 58 on the side of the intake port 54.
Is provided. A check valve 60 urged by a spring 59 is attached to the exhaust / drain port 58. The check valve 60 has a valve seat 62 formed outside a flange 61 protruding inside the exhaust / drain port 58, and a spring 59 mounted inside the flange 61.

In this embodiment, the opening of the exhaust / drain port 58 in the breathing chamber 30 is opened by opening the breathing gas supply pipe 29.
This is performed by increasing the pressure in the breathing chamber 30. However, breathing gas, its mom, so as not to flow out from the expiration outlet 52, when opening the breathing gas supply pipe 29, the expiratory outlet
The expiration outlet opening / closing valve 6 in which the purge button 64 is urged outward by the compression spring 63 to close the portion 52
5 is provided on the valve stem 66 which passes through the call-priming chamber 30, and against the expiratory outlet 52. A projection 67 is provided on a valve stem 66 of the exhalation outlet opening / closing valve 65. This projection 6
7 is formed so as to be able to contact the lever portion 69 of the demand lever 68 when the valve stem 66 is protruded into the breathing chamber 30.

The opening and closing of the opening 70 of the breathing gas supply pipe 29 is connected to a demand lever 68 and is operated by a spring (not shown).
It is performed by When the purge button 64 of the exhalation outlet opening / closing valve 65 is pressed, and the valve stem 66 of the opening / closing valve 65 is protruded into the breathing chamber 30 so as to close the exhalation outlet 52, the projection 67 of the valve stem 66 becomes By pushing the lever portion 69 of the demand lever 68 and turning the demand lever 68 counterclockwise, the breathing gas on-off valve 71 is separated from the opening 70 of the breathing gas supply pipe 29, and the breathing gas is introduced into the breathing chamber 30. Let out. Purge button 6 for exhalation outlet opening / closing valve 65
When the hand is released from the valve 4, the valve stem is separated from the exhalation outlet 52 by the action of the compression spring 63, and the projection 67 is connected to the demand lever 6
Apart from 8 of the lever portion 69, by the action of the demand lever 6 8, breathing gas supply pipe 29 is closed.

Since this example is configured as described above,
The diver wears the casing 1 on the back side with a string or the like,
Next, the user dive while holding the mouthpiece 57 of the mouthpiece unit 5. While breathing mouthpiece 57, take the prone position, the expansion of the d ABAC 3 and the auxiliary airbag 4 can be reduced by the compression action of the weight of the carbon dioxide absorber 13. Also, very a supine posture, et ABAC 3 and auxiliary also airbag 4 is compressed, the carbon dioxide-absorbing device shrinkage in volume due to the compression 1
3 can be alleviated by the expansion action of the weight.

In this example, the respiratory action of the user
Airbag 3 and the auxiliary airbag 4 is cause contraction and expansion, bellows pump 35 provided in the air bag 3
By the action of, the water that has entered the airbag 3 and the water from the water vapor in the expiration are sucked into the bellows pump 35 when the bellows pump 35 expands, and are discharged into the water collection chamber 33 when the bellows pump 35 contracts. The check valve 40 can be opened to discharge the water to the outside of the water collection chamber 33.

The user cannot avoid ingress of water from around the mouthpiece 57 while holding the mouthpiece 57 in his mouth and breathing, for example, in water. The mouthpiece units 5 water entering, the accumulated in the breathing chamber 30 of the mouthpiece unit 5. Thus, the breathing room 30
By pressing the purge button, the water accumulated inside
The breathing gas is introduced into the breathing chamber 30 from the breathing gas supply pipe 29, the pressure in the breathing chamber 30 is increased by the introduction of the breathing gas, and the water accumulated in the breathing chamber 30 is discharged outside the mouthpiece unit 5. Can be discharged. In this example, the auxiliary airbag 4 is compressed and the airbag 3
When the breathing gas in the auxiliary airbag decreases, the opening / closing arm of the protruding valve 26 is pushed by the projection 27 of the top plate 11 of the auxiliary airbag 4 to open the protruding valve 26 , and the high-pressure breathing gas flows into the auxiliary airbag 4. Gas is supplied and breathing gas can be automatically supplemented.

When the user exhales, expiration is sent from the exhalation outlet 52 of the mouthpiece unit 5 to the airbag 3 and the volume of the airbag 3 increases. Respiratory gas is supplied from nozzle 24
You. The gas is supplied to the carbon dioxide gas absorbing device 13 by the pressure at which the user inhales, and the air containing the carbon dioxide gas in the air bag 3 is passed through the carbon dioxide gas absorbing device 13 by the user's breathing action. Carbon dioxide absorption is performed.
And only the air is removed from the carbon dioxide,
Is sent to the intake pipe 56, is supplied to the breathing chamber 30 of the mouthpiece unit 5, the user can suck the air

The case where the semi-closed breathing apparatus is mounted on the back has been described above. However, even when the apparatus is mounted on the chest, the pressure is affected by the posture of the user in the same manner as when the apparatus is mounted on the back.
There is no received Rukoto. Therefore, in this example, the airbag 3 and the auxiliary airbag 4 maintain the same internal pressure as that of the lungs in both the back and chest mountings.
Can be made substantially constant. Therefore, the user can perform the same respiratory action regardless of the posture in the water.

[0047]

According to the present invention, a breathing bag and an auxiliary breathing bag are provided, an intake passage is formed by a bellows in the breathing bag, a breathing gas introduction passage is inserted, a bellows bag is formed, and water is provided below the bag. A collection chamber is formed, while in the auxiliary breathing bag, an expiration flow path is formed by bellows, and the top plate of the auxiliary breathing bag is
Counter carbon dioxide absorber arranged in weight combined, since the insertion of the high-pressure call <br/>吸Ga scan supply path for supplying breathing gas in contact with the projection provided on the top plate, the conventional semi-closed type breathing Compared to the device, the pressure and volume of the respiratory gas can be automatically compensated, the capacity of the carbon dioxide absorbing device can be prevented from being reduced, and the semi-closed respiratory device is used for a relatively long time. be able to.

In the present invention, since the carbon dioxide gas absorbing device is also used as a counterweight, breathing can be performed even when there is a change in posture such as a supine posture or a prone posture in use as compared with a conventional semi-closed respiratory device. Will not suffer. Further , the present invention provides a semi-closed respiratory apparatus, wherein a drain port having a check valve is formed on the opposite side of the mouthpiece of the respiratory chamber of the mouthpiece unit, and a respiratory outlet of the respiratory chamber is formed. A breathing gas inlet is formed in close proximity, and a protrusion provided on the valve stem of the on-off valve of the expiratory outlet controls the on-off valve of the respiratory gas inlet, so that it is compared to a conventional mouthpiece unit. With a simple operation such as a button operation, for example, the check valve at the drain port can be opened to push out the water vapor and water out of the mouthpiece unit. Therefore, according to the present invention, the water vapor and water present in the breathing chamber of the mouthpiece unit can be removed by operating the valve stem of the on-off valve at the expiration outlet at appropriate intervals. compared to the apparatus, can reduce the water vapor and water contained in the breath sent from the mouthpiece unit to the breathing bag and the auxiliary breathing bag can be used over a long time carbonated gas absorber.

According to the present invention, since the carbon dioxide adsorbing device is mounted at a position where the breathing bag can be expanded and contracted, the weight of the carbon dioxide absorbing device can resist the expansion or contraction of the surrounding bag against the breathing bag. Therefore, due to the weight of the carbon dioxide adsorption device, the internal pressure of the breathing bag can be maintained at the same level as the internal pressure of the lungs regardless of the user's posture. It has the effect of being able to perform a respiratory action.

Further, as described above, the present invention introduces the breathing gas from the tank into the breathing chamber of the mouthpiece unit via a pipe, and opens the opening of the pipe when the purge button is operated, thereby opening the breathing gas. Is introduced into the breathing chamber to be in a pressurized state, and the check valve of the drain port provided in the breathing chamber is opened to drain the water in the breathing chamber. Drainage work can be performed very easily.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing an entire embodiment of the present invention.

FIG. 2 is an enlarged partial sectional view schematically showing a breathing bag and an auxiliary breathing bag in the embodiment of FIG.

FIG. 3 is a partial cross-sectional view schematically showing one operation mode of the mouthpiece unit in the embodiment shown in FIG. 1 during normal use.

FIG. 4 is a partial cross-sectional view schematically showing one operation mode of the mouthpiece unit in the embodiment shown in FIG. 1 during drainage.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Breathing apparatus 2 Gas tank for breathing, gas cylinder for breathing 3 Airbag 4 Auxiliary airbag 5 Mouthpiece unit 6 Mounting board 7 Cover 8 Intermediate support plate 9 Bottom plate 10 First bellows 11 Top plate 12 Second bellows 13 Carbon dioxide Gas absorber 14 Respiratory gas 15 Pressure reducer 16 First flow path of pressure reducer 17 Measuring device 18 Residual pressure gauge 19 Depth gauge 20 Second flow path of pressure reducer 21 Filter 22 Flow control valve 23 Fitting 24 Respiratory gas supply the nozzle 25 pressure reducer third channel 26 ejection off valve 27 portion 34 drainage outlet 35 recessed breathing chamber 31 intake outlet 32 expiratory inlet 33 of the fourth channel 30 mouthpiece unit of projections 28 control arm 29 pressure reducer Bellows pump 35 'end plate 36 Upper annular plate member 37 Lower annular plate member 38 Water collecting chamber 39 Bottom part of water collecting chamber 4 , 51, 53, 60 Check valve 41 Water outlet 42 Intake outlet 43, 47 Tubular bellows 44, 48 Weir 45 Expiration inlet 46 Gas inlet of carbon dioxide absorber 49 Gas outlet of carbon dioxide absorber 50 Carbon dioxide absorption chamber 52 Mouthpiece unit breathing chamber exhalation outlet 54 Mouthpiece unit breathing chamber inhalation inlet 55 Expiratory tube 56 Intake tube 57 Mouthpiece 58 Exhaust / drain 59 Spring 61 Flange 62 Valve seat 63 Compression spring 64 Purge button 65 Expiratory outlet opening / closing valve 66 Valve rod 67 Expiratory outlet opening / closing valve protrusion 68 Demand lever 69 Demand lever lever 70 Opening of breathing gas supply pipe 71 Breathing gas on / off valve

Claims (5)

(57) [Claims] 1. A mouthpiece unit and a breathing gasta
And the call collected through the mouthpiece unit
Gas and breathing gas from the breathing gas tank are supplied
Telescopic airbag and the airbag
From the supplied gas mixture of the expired gas and the breathing gas
A carbon dioxide absorption device that removes carbon dioxide, and this carbon dioxide
The mixing gas after the carbon dioxide gas has been removed through the adsorption device.
And a telescopic auxiliary airbag to which air is supplied.
From the auxiliary airbag to the mouthpiece unit
Semi-closed breathing apparatus to which the mixed gas for inhalation is supplied
, Wearing in contact with the diver's back or belly in the wearing state
Substrate and a part of the airbag are defined.
Both are attached to the mounting substrate in conjunction with the expansion and contraction of the airbag.
Intermediate supports that move away and approach
A holding plate and a part of the auxiliary airbag are defined.
With the extension and contraction of the auxiliary airbag.
Moving away from and approaching the holding plate
It has a top plate, and the carbon dioxide adsorption device is mounted on the top plate.
A semi-closed breathing apparatus characterized by being attached. 2. The apparatus according to claim 1, wherein said intermediate support plate is sandwiched.
The airbag is located on the side of the mounting substrate,
The auxiliary airbag is located on the side of the tabletop,
The intermediate bag supports the airbag and the auxiliary airbag.
Semi-closed breathing apparatus characterized by the partition
Place. 3. The vehicle according to claim 2, wherein
For breathing from the breathing gas tank to the auxiliary bag
A discharge valve capable of discharging gas is attached to the intermediate support plate.
The top plate is provided with the intermediate support plate at the discharge valve.
The discharge valve moves from the closed position to the open position
Control arm for switching to the
A semi-closed breathing apparatus characterized by the following. 4. The method according to claim 1, wherein
In the above, the mouthpiece unit is connected via an intake pipe.
It communicates with the auxiliary airbag and through the expiratory tube.
A respiratory chamber communicating with the airbag
To supply breathing gas from the breathing gas tank to the
An intake gas supply pipe and a breathing gas for opening and closing the breathing gas supply pipe.
Open the on-off valve and the respiratory gas on-off valve in the closed state
An exhalation outlet that both connects the breathing chamber to the exhalation tube
Stem means movable to a position for closing the valve, and the stem means
Outside of the mouthpiece unit to move
A purge button located and an external
With a drain with a check valve that allows only fluid passage
A semi-closed breathing apparatus characterized by the following. 5. A mouthpiece unit and a breathing gasta
And the call collected through the mouthpiece unit
Gas and breathing gas from the breathing gas tank are supplied
Telescopic airbag and the airbag
From the supplied gas mixture of the expired gas and the breathing gas
A carbon dioxide absorption device that removes carbon dioxide, and this carbon dioxide
The mixing gas after the carbon dioxide gas has been removed through the adsorption device.
And a telescopic auxiliary airbag to which air is supplied.
From the auxiliary airbag to the mouthpiece unit
Semi-closed breathing apparatus to which the mixed gas for inhalation is supplied
In the above, the mouthpiece unit is connected to the auxiliary via an intake pipe.
The air bag is connected to the air bag and the air
A respiratory chamber communicating with the bag, and
A breathing gas supply that supplies breathing gas from a breathing gas tank
Supply pipe and breathing gas switch valve for opening and closing this breathing gas supply pipe
Open the respiratory gas on-off valve in the closed state and
Block the exhalation outlet that connects the respiratory chamber to the exhalation duct
Valve means which can be moved to a position
Located outside of the mouthpiece unit to allow
Purge button and fluid passage from the breathing chamber to the outside
Only having a drain with a check valve to allow
Characteristic semi-closed breathing apparatus.