JP2602289Y2 - Quick fitting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick coupling, and more particularly to a quick coupling used for connecting a high-pressure air hose.

[0002]

2. Description of the Related Art Conventionally, a connection between an air hose such as a pneumatic tool and an air compressor is provided with a quick coupling socket on the air compressor side, and a plug is attached to the hose so that the hose can be attached and detached with one touch. When the plug is inserted into the socket by sliding the lock ring provided in the socket, the tip of the plug opens the self-sealing valve of the socket, and when the hand is released from the lock ring, the lock ring returns to the locked position by the bias of the spring, The socket and plug are joined. When removing the plug from the socket, when the lock ring is slid and the plug is removed, the self-sealing valve of the socket is closed to prevent ejection of air from the tank.

[0003]

[Problem to be Solved by the Invention] When removing the hose connected to the air compressor, the high-pressure air in the hose connected to the terminal such as a pneumatic tool blows out from the plug, and the hose moves rapidly due to the reaction force of the blown air. It may damage nearby people and goods. Therefore, there is a technical problem to be solved in order to prevent the hose from jumping due to the blown air when removing the hose and to eliminate the danger of damaging workers, etc., and the present invention solves the above problem. The purpose is to do.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in order to achieve the above object, and has been proposed to supply high-pressure air.
A quick coupling socket to be attached to the supply side,
The cell in the bracket is pressed against the sheet by spring bias.
Fushile valve is built in and outside the socket
Lock ring that is urged forward by a spring
The lock ring slides and slides freely.
Air formed so that lugs can be inserted into and removed from sockets
In the quick fitting for connecting a hose, the socket or plastic
A guide groove for the bayonet mechanism is provided in any of the
Outside surface of the socket or plug on the side without the net mechanism
A bayonet pin protruding from the front end face
Introductory part going from inside to the back, and refracted in the circumferential direction from the introducing part
Rotating part, and extending from the end of the rotating part in the front-rear direction.
And a plug that fits into the socket.
When joining, the bayonet pin is
When the plug is pushed all the way to the far end,
The self-sealing valve on the cut side can be opened.
The is to provide a quick disconnect coupling.

[0005]

[ Function ] When connecting the plug to the socket,
Slide, and further insert a bayonet pin provided on one of the socket and the plug so as to match with the introduction portion of the other guide groove, and rotate them together along the rotating portion ,
Push from the end of the rotating part along the slide part to the far end.
If it is inserted, the self-sealing valve of the socket will be
It is released and high pressure air is supplied to the plug side. And
Release the lock ring and the socket and plug are joined
I do. If you remove the plug from the socket, when the connection
Slide the lock ring as above. At this time,
Lugs fly away from the socket due to pipeline pressure
The bayonet pin engaged with the guide groove
It collides with the front end of the slide portion of the guide groove, and
Stops while it is held in the socket. At this time,
The self-sealing valve of the socket is no longer pressed by the plug.
To close. Therefore, insert the bayonet pin into the guide groove.
The bayonet pin rotates along the turning part and separates the bayonet pin from the introduction part.
Remove and remove the plug from the socket. Therefore, the plug
It is required to always hold the plug when attaching and detaching the plug from the socket, preventing the plug and hose from coming off the socket and jumping off due to the thrust of the high-pressure air ejected from the hose when the lock of the quick coupling mechanism is released. Is done.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a socket 1 of a quick fitting which is attached to a supply side of high-pressure air. A self-sealing valve 3 is built in a body 2, and a coil spring 4 connects the self-sealing valve 3 to a seat 5.
To prevent leakage of high pressure air. Ball receiving holes 6, 6 are radially formed in the vicinity of the distal end portion of the body 2, and the balls 7, 7,.
And a lock ring 8, which is loosely fitted to the body 2 and prevents the balls 7, 7,... From falling off, to form a quick coupling mechanism for fixing the socket 1.

The lock ring 8 is urged forward by a coil spring 9 mounted on the body 2, and presses the balls 7 on the inner peripheral surface to project into the fitting portion of the socket 1. Reference numeral 10 denotes an O-ring. The guide groove 11 of the bayonet mechanism provided in the front part of the socket 1 has an introduction part 11a extending from the front end face to the back, a rotation part 11b bent circumferentially from the introduction part 11a, and extends in the front-rear direction from the end of the rotation part 11b. And a slide portion 11c provided.

The plug 21 shown in FIG. 2 is provided with a groove 22 for engaging the balls 7, 7,... Of the socket 1 on the outer peripheral surface of the fitting portion at the front part (right side in the figure), and on the outer peripheral surface of the grip part at the rear part. A bayonet pin 23 protrudes. When connecting the plug 21 to the socket 1, the lock ring 8 of the socket 1 shown in FIG.
Of the plug 21 into the socket 1 and slide the bayonet pin 23 into the guide groove 1.
1 and is further inserted in conformity with the introduction portion 11a. And
By rotating the plug 21, the bayonet pin 23 is
1b, and push it into the back of the slide portion 11c. Thereby, as shown in FIG. 3, the self-sealing valve 3 of the socket 1 is pushed open by the tip of the plug 21, and high-pressure air is supplied to the plug side 21. And lock ring 8
When the hand is released, the lock ring 8 returns to the normal position by the bias of the coil spring 9 as shown in FIG.
And the plug 21 are connected.

When the plug 21 is to be removed from the socket 1, the balls 7, 7,... At this time, the disconnected plug 21 protrudes in a direction away from the socket 1 due to the pipeline pressure, and the bayonet pin 23 engaged with the guide groove 11 collides with the front end of the slide portion 11c of the guide groove 11. Thus, the plug 21 stops while being held by the socket 1. Then, the self-sealing valve 3 of the socket 1 is closed by releasing the pressing by the plug 21, and the high-pressure air in the hose 24 on the plug 21 side is removed by the plug 2.
1 is spouted from the tip of the plug 21 and the hose 24.
Are stopped without detaching from the socket 1. Then, the plug 21 can be removed from the socket 1 by gripping the plug 21 and rotating the plug 21 along the rotating portion 11 b of the guide groove 11 with the bayonet pin 23.

FIGS. 4 and 5 show another embodiment, in which a bayonet pin 32 is provided in a socket 31 and a guide groove 42 is provided in a plug 41, contrary to the above-described embodiment.
The operation method and the operation and effect are exactly the same as those of the previous embodiment.

[0011]

According to the present invention, as described in detail in the above embodiment, since the quick coupling mechanism and the bayonet mechanism are combined, when the plug is removed from the socket, the quick coupling mechanism is operated to operate the pipeline. When the connection is released, the socket and the plug are engaged by the bayonet mechanism, and the high-pressure air in the hose is blown out in the engaged state. Therefore, even if the plug is not manually held, the plug and the hose are not jumped by the jet air, and the risk that the plug and the hose jump unexpectedly to injure surrounding people or damage the article is eliminated. This is a device that contributes to improving safety.

[Brief description of the drawings]

FIG. 1 is a sectional view of the socket of the present invention.

FIG. 2 is a sectional view of the plug of the present invention.

FIG. 3 is a partially cutaway side view showing the connection between the socket and the plug according to the present invention.

FIG. 4 is a sectional view of a socket according to another embodiment.

FIG. 5 is a side view of a plug according to another embodiment.

[Explanation of symbols]

 1,31 socket 8 lock ring 11,42 guide groove 21,41 plug 23,32 bayonet pin 24 hose

Claims (1)

(57) [Scope of request for utility model registration] 1. A quick connector mounted on a supply side of high-pressure air.
A hand socket, in which a spring is biased.
Built-in self-sealing valve pressed against the seat
And the outside of the socket is urged forward by a spring.
The lock ring is slidably and loosely fitted to the lock ring.
The plug can be attached to and detached from the socket with the slide of the click ring.
Quick joints for connecting air hoses
In either the socket or the plug, a bayonet machine
A guide groove is provided on the side where the bayonet mechanism is not provided.
Bayonet pins protrude from the outer surface of the socket or plug
And the guide groove is an introduction portion extending from the front end face toward the back.
A rotating part that is bent circumferentially from the introduction part, and the rotating part
And a slide part extending from the end of
Further, when fitting the plug into the socket,
When the yonett pin is pushed down to the far end of the slide
When the plug is inserted, the tip of the plug will
A quick coupling characterized by being configured to be able to open a rule valve .