JPH0191872A - Container of oxygen-generating type protector means for respiration - Google Patents

Abstract

PURPOSE: To preserve an oxygen generating agent for a long time and to facilitate the operation in case of use by sealing and housing a protector for oxygen generation type respiration into a container having a full open type lid and an automatic pressure release valve against the increase of pressure. CONSTITUTION: A full open type lid 15 made of a metal, opening its entire bottom face and having a knob 14 on its upper face is provided and inside a cylindrical main body 16 of container having a projecting part 15' expanding its inside in the form of flange proximately to the lid 15, a protector 13 for respiration is inserted and housed from an opening on the bottom face of the main body 16 of container in the state of reducing entire capacity by folding a respiratory bag 3 together with an inhale cylinder 11 and a spring 12. On the other hand, an automatic pressure release valve 19 is attached on the upper face (inside the container) while boring a circulation hole 18 at the center of a circular bottom plate 17, to which ring-shaped packing is attached around the peripheral edge of the upper face for airtightly closing the opening on the bottom face of the main body 16 of container, and a short and cylindrical cover 20 is air-tightly fixed at that flange part 21.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an oxygen-generating respirator housing, and more particularly, to a container for storing an oxygen-generating respirator in a container having an automatic pressure relief valve. Concerning a sealed oxygen-generating respirator housing.

[Conventional technology]

By inhaling oxygen-deficient air, toxic gas, steam, etc. at mines, factories, and other workplaces, fire sites, etc.
Oxygen masks with oxygen cylinders have been commonly used as respiratory protection devices that are used to harm the human body. Oxygen-generating respirators have been developed that use oxygen-generating agents such as substances that generate oxygen by reacting with gases and moisture, such as potassium superoxide (KOz), peroxide, and IJium (Na202). . These generally consist of a facepiece, a breathing bag, an oxygen generating can, etc., and the representative example is 1 Japanese Patent Publication No. 58-12766.
There are some that are shown in Publication No. 4, etc.

In the former, a breathing bag is connected to a half-face mask, and an oxygen generating can is provided inside this breathing bag with only the lid exposed to the outside of the bag, and the inlet of the oxygen generating can is connected to a half-face mask through an exhalation valve. The outlet is opened into the breathing bag, and an intake valve is interposed between the breathing bag and the half-tooth.

The exhaled air from the human body passes through the exhalation valve from the half-face mask and enters the oxygen generating can, where the oxygen generated by the reaction between carbon dioxide gas and water in the exhaled breath and the oxygen generating agent is added, and the air enters the breathing bag from the outlet. After being exhausted, it is inhaled back into the human body as oxygen-enriched gas through an intake valve and a half-face mask.

In addition, the latter has a facepiece such as a full-face mask, a half-facemask, or a mouthpiece, a breathing bag, and an oxygen generating can connected from top to bottom, and the facepiece is connected to an exhalation valve and an inhalation valve, The generator can is connected by an exhalation passage WK.

The exhaled air from the human body descends from the half-face mask through the exhalation valve and exhalation passage pipe and enters the oxygen generating can, where the oxygenated gas is expelled into the breathing bag and then stored inside the breathing bag. It rises while being cooled, passes through an intake valve and a half-face mask, and is inhaled into the human body again. Both are closed-circulation oxygen-generating respirators based on basically the same principle, but the former is generally a short-time type with a relatively small oxygen-generating canister installed near the half-face mask. The latter had a relatively large-capacity oxygen generating can installed at the bottom of the breathing bag, making it long-lasting.

Such oxygen-generating respirators are relatively lightweight, convenient to carry, and have excellent performance when in use, but as mentioned above, they are generally reserved for emergencies, so they cannot be stored. It is necessary to store the oxygen generator in a state where it is isolated from the outside air. For this reason, there are methods of sealing the facepiece of half-face masks, full-face masks, mouthpieces, etc. that communicate with the outside air to prevent outside air from entering, and sealing the entrance and exit of the oxygen generating can and breaking this seal in preparation for use. A method of providing a mechanism for removing dirt (Japanese Utility Model Application Publication No. 50-50299) and an oxygen generating agent are filled into a cartridge and the cartridge is heated so that it can be inserted into an oxygen generating can. There is a method of storing it in a sealed bag in an inert gas atmosphere in another airtight bag that is not permeable, and then taking it out from the bag when it is used and storing it in an oxygen generating can (Japanese Utility Model Publication No. 60-99268). .

[Problem that the invention seeks to solve]

However, sealing the facepiece part from the outside air cannot be guaranteed to be perfect because the shape of this part is complicated, and since it is made of elastic material such as rubber, there is a risk that the trap will peel off during storage. Furthermore, sealing the entrance and exit of the oxygen generating can and providing a breaking mechanism therein requires an extremely complicated structure and troublesome processing. Furthermore, if the oxygen generating agent is filled into a cartridge and stored in a sealed bag, it must be taken out and stored in the oxygen generating can again when used, making the operation complicated and practical for emergencies. Each had their own problems, such as not being accurate.

[Means and effects for solving the problems] The present inventors have solved these problems, and are able to store oxygen-generating respirators for a long period of time without deteriorating the oxygen-generating agent, while also being able to save the complicated As a result of extensive research, we have developed an oxygen-generating respirator with a full oven-type lid and an automatic pressure relief valve to prevent pressure rises. The present invention has been completed based on the discovery that the object can be achieved by storing the product in a sealed container.

That is, the present invention provides an oxygen generating type respirator that includes a face piece, a breathing bag, and an oxygen generating can filled with an oxygen generating agent in a container having a full oven-shaped lid and an automatic pressure relief valve to prevent an increase in internal pressure. This is an oxygen-generating respiratory protective equipment storage body characterized by being stored.

In the present invention, the oxygen-generating respirator (hereinafter abbreviated as a respirator) that is sealed in a container is basically equipped with a facepiece, a breathing bag, and an oxygen-generating can, and is isolated from the outside air. This is a closed-circulation type respiratory protector that adds oxygen to exhaled breath from the human body and then closes the oxygen-enriched gas so that it can be re-inhaled. In addition, the container that seals and stores the respiratory protection equipment is a full-oven type for taking out the protective equipment, that is, the lid opens on the entire surface by pulling the knob, and the container is deformed or damaged due to internal pressure increase due to self-decomposition of the oxygen generating agent. It has an automatic pressure relief valve to prevent this.

The present invention will be specifically illustrated with reference to the drawings.

Fig. 1 is a partially cutaway perspective view of a respirator stored in a container when in use, and Fig. 2 is a partially cutaway perspective view of an oxygen-generating respirator housing in which a respirator is hermetically stored in a container. It is an external view.

In FIG. 1, a half-face mask 2 that covers the mouth and nose is stacked inside the lower part of a hood 1 that covers the head and face. Further, a flexible and foldable breathing bag 3 is provided at the bottom of the half mask 2. In the upper part of the breathing bag 3, there is an oxygen generating can 7 filled with an oxygen generating agent and having an exhalation inlet 4 and an outlet 5 and an inhalation hole 6. A breathing valve 1o consisting of an exhalation valve 8 and an intake valve 9 is provided on the half mask 2 side of the oxygen generating can 7, and the exhalation valve 8 is connected to the inlet 4 of the oxygen generating can 70, and the intake valve 9 is connected to the intake hole 6. .

A flexible suction cylinder 11 with an open bottom is connected to the lower part of the intake hole 6 of the oxygen generating can 7, and a spring 12 is attached inside the suction cylinder 11 to form a respiratory protector 13. .

In FIG. 2, a fully open type lid 15 made of metal is opened on the entire bottom surface and has a knob 14 on the top surface, and has a convex portion 15' that is proximate to the lid 15 and has a flange-like bulge on the inside. Inside the cylindrical container body 16 is a first
The respiratory protection A13 as explained in the figure is inserted through the bottom opening of the container body 16 and stored in a state where the breathing bag 3 is folded together with the suction cylinder 11 and the spring 12, and the overall volume is reduced. (The condition of the internal respiratory protection device is not shown).

On the other hand, a circular bottom plate 17 has a ring-shaped gasket attached to the periphery of the top surface to airtightly close the opening on the bottom surface of the container body 16. A circulation hole 18 is bored in the center of the circular bottom plate 17. ) K has a short cylindrical cover 20 to which an automatic pressure relief valve 19 is attached, and is airtightly fixed at its flange 21. By placing the bottom plate 17 over the bottom opening of the container body 16 and wrapping the periphery of the bottom plate 17, the two are airtightly fixed. ! It is a two-element type respirator housing.

FIGS. 6A and 6B are sectional views showing the principles of different automatic pressure relief valves attached to the bottom plate of the container together with a cover, respectively.

The automatic pressure relief valve 19 shown in FIG. 3A has one end sealed and a curved end open, and a rubber tube 24 (insect rubber) fitted on the outside of a metal cylindrical body 23 having a discharge hole 22 on the side surface. It is something that The automatic pressure relief valve 19 is attached to the side wall K of the short cylindrical cover 20 with the opening of the cylindrical body 23 exposed outside (inside the container), and the collar 21 of the cover 20 is connected to the communication hole of the container body 16. 18 is fixed to the inside of the bottom plate 17. When the internal pressure of the container becomes higher than a predetermined value due to natural decomposition of an oxygen generating agent, the pressure applied to the exhaust hole 22 causes the rubber tube 24 to expand outward, causing the inner peripheral surface of the rubber tube 24 and the cylindrical body to expand. A gap is formed between the cover 23 and the outer circumferential surface of the cover 23, and gas is released into the cover 20 from this gap and is further discharged to the outside through the communication hole 18. As a result of this, the internal pressure of the container returns to the predetermined pressure. The predetermined pressure is set by selecting the elasticity, wall pressure, length, etc. of the rubber tube 240. The automatic pressure relief valve 19 shown in FIG.
A step is provided inside the valve seat 25, and the cylindrical body 2
A valve element 26 that contacts the valve seat 25 is provided inside the valve 3 and is pressed against the valve seat 25 by springs 27 . When the internal pressure of the container becomes higher than a predetermined internal pressure, the valve body 26 springs 2.
7, a gap is created between the valve seat 25 and the valve body 26, and the gas inside the container is discharged from this gap to the outside via the exhaust hole 22 and the circulation hole 18, and the inside of the container is maintained at a predetermined pressure. Return to The predetermined pressure is set by appropriately selecting the strength of the spring 27, etc.

Respiratory protective equipment is stored in a sealed container and sealed from outside air when in use.However, when stored for a long period of time, especially when the ambient temperature is high, the oxygen generating agent may self-contaminate, albeit slightly. The internal pressure of the container may gradually increase due to the generation of oxygen gas due to decomposition.

At this time, the automatic pressure relief valve 19 of K is activated, and the internal pressure is maintained in a steady state by exhausting excess gas, thereby preventing deformation or damage of the container.

In the event of an emergency such as a fire outbreak or leakage of toxic gas, the lid 15 can be quickly removed from its entire surface by raising and pulling the opening knob 14 of the lid 15 of the storage container, and the respiratory protective equipment 13 contained inside can be removed. easily removed. At this time, since there is a flange-like protrusion 15' close to the opening, it is possible to touch the cut end of the opening after removing the lid 15 and get injured, or the respiratory protection equipment may come into contact with it. There is no risk of damage. At the same time as being taken out, the breathing bag 3 is instantaneously inflated by the action of the spring 12, and is immediately attached to the human body in a state where it can breathe. The exhaled air exhaled from the human body into the half mask passes through the exhalation valve 8 and the oxygen generating can 7
to go into. As the exhaled air passes through the oxygen generating can 7, the moisture and carbon dioxide in the exhaled air and the oxygen generating agent undergo an exothermic reaction, and an excessive amount of oxygen is generated.

This high-temperature oxygen-enriched gas with enriched oxygen concentration and low carbon dioxide concentration is passed from the outlet 5 of the oxygen generating can 7 to the breathing bag 3.
is discharged into the interior of the air intake tube 11, and is cooled while descending outside the intake tube 11 within the breathing bag 3 and reaches the lower end of the intake tube 11. Here, the oxygen-enriched gas is reversed, sucked up inside the intake cylinder 11, rises, passes through the intake hole 6 and intake valve 9, reaches the half-face mask 2, and is inhaled into the human body. Circulatory breathing is performed by repeating this process and cutting off the outside air.

In the present invention, the respiratory protective equipment sealed in a container includes:
It has at least a facepiece, a breathing bag, and an oxygen source, and as shown in Figure 1, the trap has an oxygen generating can located close to the facepiece, and the oxygen generating can is attached to the breathing bag. An example is one in which the facepiece and the exhalation inlet of the oxygen generating can are connected to the lower part with a flexible exhalation passage pipe. Facepieces include full-face masks that cover the entire face, half-face masks that cover the mouth and nose, and mouthpieces made of synthetic rubber, natural rubber, and plastic. A hood like this can be attached.

The hood is made of a stretchable sheet or cloth, such as a rubber sheet.
Fabrics made of threads made of high elasticity fibers such as rubber or spandex are used, but among these, high elasticity 41
Knitted fabrics and woven fabrics made of so-called cored yarns in which fiber yarns are used as cores are preferred.

An exhalation valve and an inhalation valve are usually connected to the face piece, and the exhalation valve is connected to the exhalation inlet of the oxygen generating can either directly or via a flexible exhalation straight line.

The breathing bag is made of a flexible material, such as rubberized cloth, and if an inhalation pipe, an exhalation passage pipe, etc. are provided, these are all made of flexible material. The breathing bag may be equipped with an automatic exhaust valve or the like to vent excess oxygen-enriched gas generated during use.

The oxygen generator filled in the oxygen generator usually generates oxygen by reacting with moisture and carbon dioxide in exhaled breath, such as potassium superoxide (KO2) and sodium peroxide (Na20z). Preference is given to substances which, if desired, promote the evolution of oxygen during their use, such as Hobkalit.

Oxidized steel etc. are added. The oxygen generating agent may be directly filled into the oxygen generating can, or may be stored in the oxygen generating can in the form of a cartridge.

In the present invention, the respirator is sealed in one compartment in a container. The container is made of metal such as aluminum or tin, or synthetic resin, and although there are no particular restrictions on its shape, it is usually cylindrical or elliptical, and is equipped with a fully open lid and an automatic exhaust valve. Further, a hanging band or the like may be attached to the container as desired. The lid can be fully opened by pulling the knob, allowing the respirator to be easily removed from the container. At this time, in order to prevent your hands or respiratory protection equipment from touching the cut remaining at the opening, place a flange-like protrusion on the inside of the container near the opening. The automatic pressure relief valve can be installed on the bottom, top, or side of the container, but a flat surface of the container is preferred for ease of installation, especially as shown in Figures 2 and 6. It is preferable to set an automatic pressure relief valve on a cover or the like and attach it to the position of the communication hole provided in the container.

As an automatic pressure relief valve, it appropriately discharges excess gas that gradually accumulates inside the container and prevents the pressure from rising inside the container.
It can be kept below 0゜05Kf/ff1
Even if an external pressure of about G is applied, it is possible to prevent outside air from entering the container. There are no particular restrictions on the type of automatic pressure relief valve that can satisfy these conditions, but
The examples shown in Figure 3A and 3A are advantageous in that they are relatively small and can be carried.
As shown in Figure 2, the structure using rubber tubes is simple, there are few failures, and it is practical.

For example, in the automatic pressure relief valve shown in Fig. 6A, the cylindrical body 23 has an outer diameter of 1
．． 5-3.0 mm, length 8.0-2 mm, inner diameter 1.0-2 mm
．． 0, depth 4.0-15. .

The exhaust hole 22 can be relatively small, with a diameter of about 0.8 to 1.5 mm. The rubber tube 24 is made of synthetic rubber such as natural rubber or chloroprene, and its length preferably covers the entire cylindrical body 23, and its inner diameter may vary depending on the elasticity of the rubber. Although not possible, it is usually 50 to 99% of the outer diameter of the cylindrical body 23.
Preferably, the thickness is selected from 90 to 98% and the thickness from 0.3 to 2.0 mm. In addition, even if the internal pressure of the container is the same as the outside pressure but slightly lower due to temperature changes during storage, in order to completely prevent outside air from entering the container, a non-volatile material is applied to the outer circumferential surface of the cylindrical body 23. A thin layer of liquid, such as oil or grease such as silicone or fluororesin, may be applied.

〔Effect of the invention〕

The storage body of the present invention is convenient for daily storage and transportation because the respiratory protective equipment is folded into a compact bag and sealed in a container.In addition, the internal pressure is always maintained at a normal level with an automatic pressure release valve. It can be stored for a long time because the container will not be deformed or damaged, and the outside air will not get in.

Moreover, in case of emergency, etc., the lid can be opened by simply pulling the knob, and the respirator can be put on and used immediately after being taken out.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of the oxygen-generating respirator, FIG. 2 is an external view of the respirator housing, and FIG.
Figures 1 and 2 are cross-sectional views showing the principle of an automatic pressure relief valve. The drawing numbers are as follows. 1 Hood 2 Half mask 3 Breathing bag 6 Intake hole 7 Oxygen generating can 8 Exhalation valve 9 Intake valve 11 Intake tube 14 Knob 15 Lid 16 Container body 17 Bottom plate 19 Automatic pressure relief valve 20 Cover 22 Discharge hole 23 Cylindrical body 24 Rubber tube 25 Valve seat 26 Valve body patent applicant Representative of Nippon Bionics Co., Ltd. Ryo Yamazaki −

Claims (1)

[Claims] An oxygen-generating respirator containing a facepiece, a breathing bag, and an oxygen-generating can filled with an oxygen-generating agent is housed in a container with a fully open lid and an automatic pressure relief valve to prevent internal pressure from rising. An oxygen-generating respirator housing featuring: