JPH0715055U - Supply valve fixture in an air breather - Google Patents

Abstract

(57) [Summary] [Purpose] To enable temporary fixation of the supply valve removed from the face piece of the air respirator. [Structure] A tubular support portion 15 into / from which a connection pipe 8 of a supply valve 7 removed from a face body 10 of an air respirator can be inserted and removed, and a chest band 3 or a waist belt 4 formed integrally with the tubular support portion 15.
The supply valve fixture 1 is constituted by the attachment means 16 and the attachment means 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a temporary fixing of a supply valve detached from an air breather.

[0002]

[Prior art]

 Conventionally, air respirators worn by workers when exposed to oxygen-deficient air in factories, mines, fire sites, etc. are well known, and details of general air respirators should be known from JIS-T8155. You can Further, as a technique for preventing waste of air in the air respirator, Japanese Patent Publication No. 58-47184 discloses an air respirator in which a supply valve is detachably attached to a face piece. By using this kind of technology to remove the supply valve from the face piece between the time when the worker wears the air ventilator and the time when he / she arrives at the scene, valuable air in the high-pressure air container is not wasted. .

[0003]

[Problems to be solved by the device]

 By the way, when the supply valve is removed from the face piece as in the above-mentioned known technique, the worker must go to the site with the supply valve, and for this reason, it is extremely difficult for at least one hand to be deprived of the safety work. There is a problem that it is not preferable. To avoid this, if the supply valve is left hanging from the medium-pressure conduit without being manually supported, a shock is applied each time the worker moves, and the supply valve malfunctions causing air leakage. There is.

Therefore, the present invention has an object to solve the above-mentioned problems of the prior art by attaching the temporarily fixed tool of the removed supply valve to any one of the clothing and the brace.

[0005]

[Means for Solving the Problems]

 The means to solve the above problems of the present invention is a fixture for detaching a detachable supply valve from a face piece of an air respirator and locking it on either clothing or brace. The fixing means is provided with a means for temporarily fixing the detached supply valve and a means for attaching to the clothing or the brace.

In a preferred embodiment of the present invention, the supply valve inserts and removes a connection pipe attached to the supply valve into and from a connection port of a face piece, and the locking means inserts and removes the connection pipe. A tubular support part having a retaining function for the connecting pipe and a ventilation part communicating between the inside and the outside of the support part are provided, and the attachment means can be engaged with either the chest band or the waist belt of the air respirator. Is.

[0007]

[Action]

 The supply valve fixing device configured as described above is attached to the chest of an operator using, for example, a chest band of an air respirator. When the connecting pipe of the supply valve removed from the face piece is inserted into the tubular support portion of the fixture, the retaining function of the support portion acts and is fixed. When air supply to the face piece is required, pull out the connection tube from the fixture and insert it into the connection port.

[0008]

【Example】

 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 half of the body of an operator wearing an air breathing apparatus, and a supply valve fixing tool 1 is attached to the chest of the operator. The high-pressure air container 2 of the air respirator is fixed to the back of the worker by a chest band 3, a waist belt 4 and a shoulder belt 5. A supply valve 7 is attached to the tip of a medium-pressure conduit 6 extending from the container 2, 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 covering the face. When the worker breathes, the breathing operation opens a diaphragm valve (not shown) built in the supply valve 7, and guides the depressurized air from the high-pressure air container 2 into the face piece 10 through the connecting pipe 8. You can Exhaled air is discharged from a check valve (not shown) provided on the face piece.

The connection valve 8 of the supply valve 7 can be inserted into and removed from the connection port 11. When the air supply from the high-pressure air container 2 is not required, the connection valve 8 is removed beforehand. This is preferable. By doing so, the connection port 11 is opened to the atmosphere, and the worker can freely breathe high-pressure air without wasting it. In FIG. 1, the detached supply valve 7 is shown in phantom and can be locked to the fixture 1 according to arrow A.

The fixture 1 has a tubular support portion 15 into which the connection pipe 8 is inserted, and a mounting portion 16 integrated with the tubular support portion 15. The chest band 3 is passed through a pair of insertion holes 17 formed in the mounting portion 16. There is.

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 enlarged diameter portion 15B, and a lower end portion of the reduced diameter portion 15A has a through hole 18 for communicating the inside and outside of the tube. On the inner circumference of the expanded diameter portion 15B, there are projections 19 arranged at required intervals in the circumferential direction. The reduced diameter portion 15A and the enlarged 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 are provided so as to sandwich the support portion 15, and not only the chest band 3 but also the waist belt 4 and the like can be inserted.

The supply valve 7 has a T-shaped pipe portion 23 as shown in the drawing, and the connecting pipe 8 is a part thereof, and comprises a reduced diameter portion 8A at the tip and an enlarged diameter portion 8B at the base. An O-ring 24 is fitted to the reduced diameter portion 8A so that the face piece 10 is inserted into the connection port 11 in an airtight state, and the enlarged diameter portion 8B has an annular groove 25. The reduced diameter portion 8A and the enlarged diameter portion 8B are connected via a tapered portion 26. The outer diameter of each part of the connecting pipe 8 is slightly smaller than the inner diameter of each part of the tubular support portion 15 excluding the protrusion 19, and when the connecting pipe 8 is inserted according to the arrow B, the protrusion 19 touches the expanded diameter portion 8B, and When inserted, the projection 19 snaps into the annular groove 25. Due to this engagement, the connecting pipe 8 is supported by the tubular support portion 15 and cannot be easily removed from it. When using the supply valve 7, the connecting pipe 8 may be pulled out from the tubular support portion 15. In order to prevent the supply valve 7 from malfunctioning due to a reduced pressure inside the tubular support portion 15 when the connecting pipe 8 is inserted and removed, the inside and outside of the tubular support portion 15 are communicated with each other through the through hole 18. is there.

Note that the fixture 1 may be attached to a worker's clothes or equipment in addition to being attached to a band or a belt. Further, as a retaining means for the connecting pipe 8, a slit in the pipe direction is formed between the projections 19 of the tubular supporting portion 15 to emphasize the elasticity of the tubular supporting portion 15 or to act in the radial direction of the connecting pipe 8. Can be provided on the tubular support portion 15. The fixture 1 can be attached by injection molding of thermoplastics.

[0015]

[Effect of device]

 The supply valve fixing device according to the present invention has a simple operation for fixing, since it suffices to insert the connecting pipe of the supply valve into the tubular support portion. By fixing the supply valve that has been removed from the face piece, the worker can use both hands freely, and the work safety is improved. The fixed supply valve is less likely to be impacted and waste of high pressure air due to malfunction can be prevented.

[Brief description of drawings]

FIG. 1 is a top view of an operator 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 piece 15 Tubular support 16 Mounting means 18 Vent 19 Protrusion

Claims (3)

[Scope of utility model registration request] 1. A fixture for detaching a supply valve detachable from a face piece of an air respirator and retaining it on either clothing or equipment, and temporarily retaining the detached supply valve. The above-mentioned fixture characterized by being provided with a means for attaching to either clothing or a brace integrally with the means. 2. The supply valve, wherein a connection pipe attached to the supply valve is inserted into and removed from a connection port of the face piece to perform the attachment / detachment, and the locking means allows the connection pipe to be inserted / removed and to / from the inserted connection pipe. A tubular support having a stopping function and a vent for communicating the inside and the outside of the support, wherein the attaching means is engageable with either the chest band or the waist belt of the air respirator. The fixture according to claim 1, which is characterized. 3. The fixture according to claim 2, wherein the tubular support portion has a radial projection on its inner wall, and can be snap-engaged from a desired portion of the connecting pipe in the radial direction.