JPH078945Y2 - Receptacle for plastic pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a pipe joint, and more particularly to improvement of a pull-out prevention pipe joint.

[Conventional technology]

2. Description of the Related Art Conventionally, a pipe joint having a structure in which a rubber ring is inserted between an inner surface of a receiving port and an outer surface of an insertion port for connection is known.

This type of pipe joint has the advantage of being able to absorb expansion and contraction, bending, eccentricity, etc. of the pipe due to the external force acting on the pipe and temperature change, but it is relatively easy to escape if an external force is applied to the pipe connection in the disconnection direction It has drawbacks.

Therefore, in this type of pipe joint, various measures are taken to prevent withdrawal within the range in which the advantages described above are not impaired.

As the pull-out preventing means, as shown in FIG. 3, a circumferential groove C is formed on the inner surface of the receiving ring opening side of the rubber ring mounting groove B of the receiving port A, and the C-shaped elastic body is formed in the circumferential groove C. The lock ring D is stored, and at the time of inserting the insertion slot E, the lock ring D is expanded with a diameter-expanding metal fitting (not shown), and after insertion, the lock ring D is restored and reduced in diameter to be attached to the outer surface of the insertion slot. The applicant of the present application has proposed a plastic pipe receptacle that is designed to prevent the lock pipe D from slipping out through the lock ring D (Act.
2679 publication).

[Problems of conventional technology]

However, in the above pipe fitting, the lock ring D is inserted into the insertion port E.
If the insertion opening E or the receiving opening A may rotate around the axis after being attached to the outer periphery, the position of the cut D ′ of the C-shaped lock ring D may not be known, and the insertion opening E may be received later. When it was necessary to pull out from the mouth A, there was a drawback that it interfered with the work.

[Problems to be solved by the device]

The present invention has been made in view of the above problems, and an object thereof is to provide a plastic pipe receptacle that can prevent the rotation of the lock ring around the axis even after locking and can easily perform the subsequent withdrawal work of the insertion slot. It is a thing.

[Technology that has solved the problem]

That is, in the plastic pipe socket of the present invention, a circumferential groove is formed on the inner surface of the socket opening end side of the rubber ring mounting groove of the socket, and a lock ring made of a C-shaped elastic body is formed in the circumferential groove. In the plastic pipe receiving port to be housed, a jig insertion port reaching the circumferential groove from the outer surface of the opening end of the plastic pipe receiving port is provided, and the lock is provided at one inner edge of the jig insertion port in the circumferential direction. It is characterized in that a ring locking projection is provided.

〔Example〕

 Next, an embodiment of this invention will be described.

1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of FIG.
It is a II-II sectional view taken on the line.

The plastic pipe receptacle 1 of the present invention has a circumferential groove 4 formed on the inner surface 3 of the receptacle opening opening side of the rubber ring mounting groove 2 of the receptacle 1, and the circumferential groove 4 is a lock made of a C-shaped elastic body. In the plastic pipe socket 1 containing the ring 5,
Circumferential groove 4 from the outer surface 1A of the open end of the plastic pipe receptacle 1
The jig insertion opening 6 is formed as a radial through hole reaching the above position, and the locking projection 7 of the lock ring 5 is provided on one inner edge 6A of the jig insertion opening 6 in the circumferential direction. There is.

In the above description, the locking projection 7 has a height that can be accommodated in the circumferential groove 4B.

Although the jig insertion port 6 is shown as penetrating in the radial direction from the outer peripheral surface of the receiving port, a groove may be formed axially along the inner surface from the end face of the receiving port.

[Action]

In the plastic pipe receptacle 1 of the present invention, when the insertion opening 10 is connected, the lock ring 5 is housed in the circumferential groove 4 and the cut 5A of the lock ring 5 is expanded by an appropriate jig inserted through the jig insertion opening 6. The diameter of the ring 5 is expanded and the insertion port 10 is inserted.

Then, if the diameter-expanding jig is removed, the lock ring 5 is restored and reduced in diameter, and the lock ring 5 is clung to the insertion opening 10 and prevented from being pulled out.

In this case, the cut 5A of the lock ring 5 is locked by the projection 7 formed on the inner edge of the radial through window 6, so that the insertion opening 10
Alternatively, even if the receiving opening 1 rotates around the axis, the receiving opening 1 rotates while maintaining the locked state, and the cut 5A does not move in the circumferential direction from the jig insertion opening 6 position.

Therefore, if it becomes necessary to pull out the insertion opening 10 after joining, the lock ring 5 can be easily inserted by inserting the expanding jig from the jig insertion opening 6.
It is possible to expand the diameter.

〔effect〕

As described above, according to the plastic pipe socket of the present invention, even if the insertion opening is attempted to escape from the socket, the lock ring effectively prevents it, and the cut portion of the lock ring is separated from the jig insertion opening position. Since there is no shift movement, there is a practical effect such as easy work for exiting.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of FIG.
A sectional view taken along the line II-II and FIG. 3 are explanatory views of a conventional example.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Satoshi Ochi Satoshi Ochi 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Plant Co., Ltd. (72) Kazutaka Takada 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Plant Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A plastic pipe in which a circumferential groove is formed on the inner surface of the receiving opening at an opening end side of the rubber ring mounting groove, and a C-shaped elastic ring is housed in the circumferential groove. In the receiving port, a jig insertion port reaching the circumferential groove from the outer surface of the opening end of the plastic pipe receiving port is provided, and the lock ring locking projection is provided on either inner edge of the jig insertion port in the circumferential direction. A plastic pipe socket characterized by being provided.