JP2599510Y2 - Supply valve fixtures in air respirators - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a temporary fixation of a supply valve detached from an air respirator.

[0002]

2. Description of the Related Art Conventionally, air respirators worn by workers when there is a risk of exposure to oxygen-deficient air in factories, mines, fire sites, and the like are well known. -T8155. Further, as a technique for preventing waste of air in an air respirator, Japanese Patent Publication No. 58-47184 discloses an air respirator in which a supply valve is configured to be detachable from a face body. Using this type of technology to remove the supply valve from the faceplate between the time the operator wears the air breather and arrives at the site does not waste valuable air in the high-pressure air container. .

[0003]

By the way, when the supply valve is detached from the faceplate as in the above-mentioned prior art, the operator must carry the supply valve and head to the site, so that at least one hand must be free. There is a problem that being deprived is extremely undesirable for safe work. In order to avoid this, if the supply valve is left hanging from the medium pressure conduit without being supported by hand, a shock is applied each time the operator moves, causing the supply valve to malfunction and cause air leakage. There is.

[0004] In view of the above, the present invention has been made to solve the above-mentioned problem of the prior art by attaching a temporary fixing device of a removed supply valve to one of clothing and a brace.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem by disengaging a detachable supply valve from a face member of an air respirator, and locking the detachable supply valve to either clothing or a device. The fixing tool is provided with means for temporarily attaching the detached supply valve and means for attaching to clothing or clothing.

[0006] In a preferred embodiment of the present invention, the supply valve inserts and removes a connection pipe attached to the supply pipe into and out of the connection opening of the face plate, and the attachment / detachment is performed by the locking means. A tubular support having a function of preventing the connection tube from falling off, and a ventilation part communicating between the inside and the outside of the support, wherein the attachment means can be engaged with either a chest band or a waist belt of the air breathing apparatus. is there.

[0007]

The supply valve fixing device thus constructed is attached to the operator's chest, for example, using a chest band of an air breathing apparatus. When the connection pipe is inserted into the tubular support portion of the fixture, the supply valve removed from the face body is fixed by the retaining function of the support portion. When it is necessary to supply air to the faceplate, remove the connecting pipe from the fixture and insert it into the connecting port.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the supply valve fixing device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a view showing the upper body of an operator wearing an air breathing apparatus, and a supply valve fixing device 1 is attached to the chest. The high-pressure air container 2 of the pneumatic respirator is fixed to the worker's back by a chest band 3, a waist belt 4, and a shoulder belt 5. Medium pressure conduit 6 extending from container 2
A supply valve 7 is attached to the tip of the connector, and a connection pipe 8 forming a part of the supply valve 7 is inserted into a connection port 11 of a face body 10 that covers the face. When the worker breathes, a diaphragm valve (not shown) built in the supply valve 7 is opened by the exhalation operation, and the decompressed air from the high-pressure air container 2 is guided into the face body 10 through the connection pipe 8. Can be. Expiration is discharged from a check valve (not shown) provided on the facepiece.

The supply valve 7 is such that the connection pipe 8 can be inserted into and removed from the connection port 11, and when air supply from the high-pressure air container 2 is not required, the connection pipe 8 is removed. Is preferred. By doing so, the connection port 11 is opened to the atmosphere, and the operator can breathe freely without wasting high-pressure air. In FIG. 1, the withdrawn supply valve 7 is shown in phantom lines and can be locked to the fixture 1 according to the arrow A.

The fixture 1 has a tubular support portion 15 into which the connecting tube 8 is inserted, and a mounting portion 16 integral therewith. The chest band 3 passes through a pair of insertion holes 17 provided in the mounting portion 16. is there.

FIG. 2 is a perspective view of the fixture 1 and the supply valve 7. The tubular support portion 15 of the fixture 1 includes a reduced-diameter portion 15A and an increased-diameter portion 15B, and has a through hole 18 at the lower end of the reduced-diameter portion 15A for communicating the inside and the outside of the pipe. On the inner periphery of the enlarged diameter portion 15B, there are projections 19 arranged at a required interval in the circumferential direction. The reduced diameter portion 15A and the increased diameter portion 15B are connected via a tapered portion 20 having a required gradient. The attachment portion 16 is plate-shaped, and a pair of insertion holes 17 is provided so as to sandwich the support portion 15.
Etc. can be inserted.

The supply valve 7 has a T-shaped pipe portion 23 as shown in the figure, and the connection pipe 8 is a part thereof and has a reduced diameter portion 8A at the tip.
And an enlarged diameter portion 8B at the root. An O-ring 24 is fitted in the reduced diameter portion 8A so that the face body 10 is inserted into the connection port 11 in an airtight state.
There are five. The reduced diameter portion 8A and the increased diameter portion 8B are connected to the tapered portion 2
6 is connected. The outer diameter of each part of the connection pipe 8 is
When the connecting pipe 8 is inserted according to the arrow B, the projection 19 touches the enlarged diameter portion 8B, and when the connection pipe 8 is further inserted, the annular groove 25 is formed.
The projection 19 snap-engages. Due to such engagement, the connecting tube 8 is supported by the tubular support portion 15 and does not easily come off therefrom. When using the supply valve 7, the connection pipe 8 may be pulled out from the tubular support 15. Note that the tubular support portion 1 is prevented from being depressurized when the connection pipe 8 is inserted and withdrawn so that the supply valve 7 does not malfunction.
The inside and outside of 5 are communicated by a through hole 18.

The fixing device 1 may be attached to a worker's clothes or equipment in addition to being attached to a band or a belt. In addition, as a retaining means for the connection pipe 8, a slit in the pipe direction is formed between the projections 19 of the tubular support section 15 to emphasize the spring property of the tubular support section 15 or to prevent the connection pipe 8 from coming off.
May be provided on the tubular support 15. The fixture 1 can be made by injection molding of a thermoplastic.

[0015]

The supply valve fixing device according to the present invention requires only insertion of the connecting pipe of the supply valve into the tubular support portion, so that the fixing operation is simple. By fixing the supply valve removed from the face body, the worker can use both hands freely, thereby improving work safety. An impact is not easily applied to the fixed supply valve, and waste of high-pressure air due to malfunction can be prevented.

[Brief description of the drawings]

FIG. 1 is an upper body view of a worker wearing an air breathing apparatus.

FIG. 2 is a perspective view of a fixture and a supply valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixture 3 Chest band 4 Waist belt 7 Supply valve 8 Connection pipe 10 Face body 15 Tubular support part 16 Mounting means 18 Vent part 19 Projection

Claims (3)

(57) [Scope of request for utility model registration] 1. A fixing device for detaching a detachable supply valve from a face body of an air breathing apparatus and retaining the detachable supply valve to one of clothes and a device, wherein the detached supply valve is temporarily locked. The fixing device according to claim 1, further comprising: means for attaching to one of clothing and a brace, integrally with the means. 2. The connection valve according to claim 1, wherein said supply valve inserts and removes a connection pipe attached to said connection pipe into and out of said connection port of said face body to perform said attachment and detachment. A tubular support having a stopping function and a vent communicating between the inside and the outside of the support are provided, and the attaching means can be engaged with either the chest band or the waist belt of the air breathing apparatus. The fixture according to claim 1, wherein: 3. The fixture according to claim 2, wherein the tubular support has a radial projection on an inner wall thereof, and can be radially snap-engaged with a required portion of the connection pipe.