JP2594706Y2 - Separation prevention fitting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-separation joint, and more particularly to an anti-separation joint having, for example, an anti-separation ring for preventing the pipe from being detached.

[0002]

2. Description of the Related Art An example of this kind of conventional separation prevention joint is as follows.
Japanese Patent Application Laid-Open No. 4-272, filed on September 29, 1992
No. 594. In order to prevent the pipe tip from hitting against the detachment prevention ring and preventing the pipe from being inserted, the detachment prevention joint is fitted with an auxiliary ring on the inner surface of the detachment prevention ring, and the diameter of the detachment prevention ring is increased in advance. It is something to keep. When a pipe is inserted into the socket of the anti-separation joint, the auxiliary ring is pushed out from the inner surface of the anti-separation ring by the pipe, and at the same time, the anti-separation ring is attached to the outer surface of the pipe.

[0003]

In such a conventional anti-separation joint, since the auxiliary ring is pushed out of the anti-separation ring and the anti-separation ring is attached to the outer surface of the pipe at the same time, when the pipe is further inserted thereafter. However, a large insertion force is required due to the resistance between the inner surface of the separation prevention ring and the outer surface of the pipe, and there is a problem that the workability is poor.

[0004] Therefore, a main object of the present invention is to provide a detachable joint capable of improving workability.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a socket having a ring receiving portion formed on an inner peripheral surface thereof, a hole formed in a peripheral wall of the receiving port and penetrating the ring receiving portion, and a ring receiving portion. A detachable ring having a notch formed therein and having a notch, and a top which is fitted into the notch to expand the diameter of the notch ring, and is removed from the notch after the pipe is inserted into the receptacle and is housed in the hole. , A disengagement prevention joint.

[0006]

The pipe is inserted into the receiving port with the diameter of the anti-separation ring enlarged by fitting the top into the notch. After inserting the pipe to an appropriate position, the top is removed from the notch and stored in a hole formed in the peripheral wall of the receiving port. Then, the detachment prevention ring is reduced in diameter by the restoring force, and is attached to the outer surface of the pipe.

[0007]

According to the invention, after the pipe is positioned in the receiving port, the separation prevention ring can be attached to the outer surface of the pipe, so that the insertion resistance of the pipe can be reduced and the workability can be improved. In addition, since a complicated operation is not required for expanding the diameter of the separation prevention ring, the ring can be manufactured relatively easily.

[0008] Further, since the hole is closed by storing the frame in the hole, sand or the like does not intrude into the receptacle from the hole. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, the anti-separation joint 10 of this embodiment includes a socket 14 for receiving a tip of a pipe 12 to be joined. A rubber ring 16 is provided on the inner surface of the receiving port 14.
Is formed, and a ring receiving portion 22 for receiving the separation prevention ring 20 is formed on the opening end side of the rubber ring receiving portion 18. The detachment prevention ring 20 is formed of a metal such as stainless steel into a substantially C shape, and its inner peripheral portion is formed in a substantially sawtooth cross section. The ring receiving portion 22 includes a tapered surface 24 whose diameter is reduced in the drawing direction of the pipe 12, and a diameter-enlarging portion 26 that receives the diameter of the detachment prevention ring 20 is formed deeper than the tapered surface 24. You. With the detachment prevention ring 20 attached to the ring receiving portion 22, the top 30 is fitted into the notch 28 of the detachment prevention ring 20, and the diameter of the detachment prevention ring 20 is thereby expanded. A hole 32 penetrating the ring receiving portion 22 (the enlarged diameter portion 26) is formed in the peripheral wall of the receiving port 14. Both end surfaces in the circumferential direction of the hole 32 are formed in a tapered shape whose diameter is reduced outward, and the maximum length A of the top 30 and the minimum length B of the hole 32 are set so that A> B. . A screw hole 34 is formed at a substantially central portion on the outer surface of the top 30 as can be seen from FIG.

At the time of joining the pipe 12, after confirming that the top 30 is fitted into the notch 28 of the separation preventing ring 20 from the hole 32, the pipe 12 is inserted into the receiving port 14. After the pipe 12 is positioned, the screw hole 34
The top 30 is removed from the notch 28 using a tool (not shown) screwed into the hole 32, and is stored in the hole 32. Then, the hole 32 is closed by the top 30, and the detachment prevention ring 20 is reduced in diameter by its restoring force and mounted on the outer surface of the pipe 12.

When the pipe including the pipe 12 is expanded by heating or the like after the construction, the pipe 12 is further inserted into the deep part of the receiving port 14, and the expanded portion of the pipe is absorbed. On the other hand, when the pipe contracts due to cooling or the like, the pipe 12 is pulled out from the receiving port 14, and the contraction of the pipe is compensated. When the pipe 12 is pulled out, the separation prevention ring 20 is moved in the axial direction as the pipe 12 moves. When the pipe 12 is further pulled out from the state where the separation preventing ring 20 is in contact with the tapered surface 24 of the ring receiving portion 22, the diameter of the separation preventing ring 20 is reduced by the tapered surface 24, and the inner peripheral portion of the separation preventing ring 20. Penetrates into the outer surface of the pipe 12. Therefore, the pipe 12 is not drawn out any further.

According to this embodiment, since the diameter of the separation preventing ring 20 can be increased until the pipe 12 is positioned in the receiving port 14, the insertion resistance of the pipe 12 can be reduced and the workability can be improved. . In addition, since an operation such as fitting an auxiliary ring is not required, it can be manufactured relatively easily. Further, since the hole 32 is closed by the top 30,
Sand or the like does not enter the receiving port 14 from the hole 32.

The inner surface of the opening of the receiving port 14 and the pipe 12
The mounting state of the rubber ring 16 can be checked from the gap formed between the rubber ring 16 and the outer surface of the rubber ring 16.
In the above-described embodiment, a tool is screwed into the screw hole 34 to remove the top 30. However, a grip portion is formed in the top 30 and the top 30 is gripped with a hand or a tool to remove the top 30. It may be removed. Alternatively, a locking portion may be formed on the top 30, and a tool may be engaged with the locking portion to remove the top 30.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an external view showing a top.

FIG. 4 is an illustrative sectional view showing a state where a top is accommodated in a hole.

[Description of Signs] 10 ... detachment prevention joint 12 ... pipe 14 ... receiving port 16 ... rubber ring 18 ... rubber ring storage part 20 ... separation prevention ring 22 ... ring receiving part 24 ... tapered surface 26 ... enlarged diameter part 28 ... notch part 30 ... top 32 ... hole

──────────────────────────────────────────────────続 き Continuing from the front page (72) Hiroaki Sakamoto 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside the Kubota Vinyl Pipe Factory (72) Inventor Takashi Kosugi 64 Ishizukita-machi, Sakai City, Osaka Kubota Vinyl Co., Ltd. Inside a pipe factory (56) References JP-A-5-263973 (JP, A) Japanese Utility Model Showa 56-5888 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16L 21/08

Claims (1)

(57) [Scope of request for utility model registration] A receiving hole having a ring receiving portion formed on an inner peripheral surface thereof; a hole formed in a peripheral wall of the receiving hole and passing through the ring receiving portion; a notch mounted on the ring receiving portion; And a top which is fitted in the notch to expand the diameter of the separation prevention ring and is removed from the notch after the pipe is inserted into the receptacle and is housed in the hole. , Disengagement prevention joint.