JPS5854374Y2 - pipe fitting socket - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in the dust-proof structure of a so-called quick pipe joint socket consisting of a plug and a socket.

In the above-mentioned type of quick fitting, the plug and socket are connected by engaging the locking groove provided on the socket side with the locking groove formed on the outer periphery of the plug, and the fitting is inserted into the outer periphery of the socket. An operating ring is used to unlock this connection and separate the two.

By the way, when the plug and the socket are separated, the opening of the socket in particular is exposed and is prone to attracting dust.

In order to prevent this, it has long been known to use dust-proof protective caps, but with the structure of conventional protective caps, the protective caps fall off from the pipe joints, especially when not in use, causing the rubber pipes to leak. There was a drawback that it could be walked around on or lost.

The purpose of this invention is to provide a socket for a pipe joint that provides a sufficiently reliable dust-proofing effect when in use and is equipped with a protective cap that will not fall off from the pipe joint when not in use.

The present invention will be explained in more detail below with reference to embodiments shown in the drawings.

Reference numeral 10 denotes a plug, which has an outer circumferential groove 12 that engages with a locking body 22 on the socket 20 side, and is provided with a stop valve 18 inside which is elastically repelled by a spring 16 to close the fluid path 14. .

a main cylinder portion 26 having a hole 24 into which the locking body 22 is loosely fitted;
A valve pusher 28 for opening the fluid path 14 by forcing the stop valve 18 on the plug side against the elasticity of the spring 16, and a rubber pipe connecting portion 30 are integrally molded with resin to form a socket main body. It consists of 32.

A sliding valve 34 which is resiliently repelled by a spring 33 is interposed in the annular space between the main cylinder part 26 and the valve pushing part 28, and the backing 36 of the sliding valve comes into contact with the plug 10 to close the plug. 10
and the socket) 20.

An operation ring 38 having a diagonal inner circumference that presses the locking body 22 in a centripetal direction is fitted to the outer periphery of the main cylinder portion 26 so as to be slidable while being elastically resilient to a spring 40. A mantle 42 is fitted to cover the spring and the spring.

An outer circumferential groove 44 is formed in the socket main body 32, and an inner circumferential claw 46 of the mantle is engaged with the outer circumferential groove 44.

For this reason, the two cannot separate. An outer circumferential step 50 is formed following the back portion 48 of the mantle, and a tapered surface 52 (or a curved surface with a constant radius of curvature) is formed on the rubber tube connecting portion 30 toward the outer circumferential step. ing.

In the structure shown in FIG. 1, the outer circumferential step portion 50 is formed on the mantle 42, but the outer circumferential step portion may be formed into the rubber tube connecting portion 30 as in the example shown in FIG.

In either case, an outer circumferential groove 60 is formed by the back portion 48, outer circumferential step portion 50, and insertion rubber tube 54, and the socket 20
The base ring 58 of the protective cap 56 that is inserted into the plug connection opening of
It is sufficient if the value 0 prevents the user from leaving easily.

When the rubber tube 54 has a large wall thickness, the outer circumferential groove can be easily formed, but when the wall thickness is small, the rubber tube connecting portion 30
The tapered surface or curved surface 52 of the opening end
As shown in the figure, an outer circumferential groove 60 can be formed to expand in the radial direction.

The operating method for connecting or disconnecting the plug 10 and the socket 20 is no different from the conventional one.

Further, an outer circumferential groove 60 is formed by the back portion 48 of the socket, the outer circumferential step portion 50, and the rubber tube 54, and as a result, the base ring 46 of the protective cap fitted to the several outer circumferential step portions is difficult to separate.

This invention uses a protective cap to protect the open end of the socket, that is, the end that connects to the plug, and is unique in that it prevents this protective cap from falling off. The side diameter is smaller than that of the connecting end side, and a stepped portion is provided on the outer periphery of the central portion, and a protective cap to be fitted into the opening of the connecting end is provided with a series of base rings, and the base ring is connected to the base ring. Because it fits into the outer step, the protective cap will not come off from the socket when the socket is connected to the rubber tube, and when the plug is not connected, it will always protect the end connected to the plug. Therefore, it is possible to prevent dust from entering.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing a state in which a plug and a socket are separated in an embodiment of this invention. Figures 2 and 3: A partially sectional side view showing the main parts of another embodiment. 10...Plug, 20...Socket,
26... Main cylinder body, 28... Valve pusher body, 3
0...Rubber tube connection part, 32...Socket main body, 42...Outer body, 48...Back part, 50...Outer circumferential step Part, 52...Tapered surface or curved surface, 56...Protective cap.

Claims (1)

[Scope of utility model registration request] The diameter of the opposite end of the connecting end to the plug is made smaller than that of the connecting end, and a step is provided on the outer periphery of the central portion, and a base ring is provided in series on the protective cap that is fitted into the opening of the connecting end. and a socket of a pipe joint in which the base ring is fitted to the outer circumferential step.