JP2000193159A - Socket structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an operator from inserting a resin pipe end into a depth side of an expanded socket by mistake, by mounting a locking ring in such manner that the locking with an end surface of the resin pipe is released when the external force of higher than a specific level is applied. SOLUTION: When a spigot of a hard vinyl chloride resin pipe 5 to be inserted and connected, is inserted into an expanded socket 2 of a hard vinyl chloride resin pipe 1, an end surface of the spigot of the resin pipe 5 is contacted with a locking ring 4 to be locked. The locking ring 4 is not deformed by the insertion load power of the resin pipe 5, but deformed when the pressing-in load of higher than a predetermined level is acted in the pipe axial direction of a conduit, so that the spigot of the resin pipe 5 can be moved to a depth side of the expanded socket 2. The end part of the resin pipe 5 can cope with the insertion into the depth side of the expanded socket 2 by the earthquake and the ground variation, so that the expanded socket 2 and the end part of the resin pipe 5 can be prevented from being damaged, and is excellent in earthquake resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a socket structure having a rubber ring type socket.

[0002]

2. Description of the Related Art In buried pipelines in the field of water supply and sewage, for example, connection between hard vinyl chloride resin pipes is performed using an adhesive. Instead of the TS bonding method using this adhesive, a so-called rubber ring type connection method is adopted in which a rubber ring is mounted in an annular concave groove provided on the inner peripheral surface of the enlarged diameter receiving port of the resin pipe. ing.

[0003]

However, in the above-mentioned conventional resin pipe having a rubber-ring-type enlarged diameter receiving port, an end of the resin pipe to be connected is enlarged at the construction site due to an operator error. When the connection is made by inserting the connection to the back side of the receptacle, the following problem occurs.

[0004] In other words, when an external force in the direction of the pipe axis acts on the pipe due to an earthquake, ground deformation, etc. after buried piping,
It can cope with the direction in which the resin tube inserted into the enlarged diameter receiving port comes out, but cannot cope with the direction in which the resin tube is pushed in. For this reason, the enlarged diameter receiving port or the end of the resin pipe is damaged, and the entire pipe is hindered.

SUMMARY OF THE INVENTION It is an object of the present invention to prevent a worker from accidentally inserting the end of a resin tube to the deep side of an enlarged diameter receiving port,
As a result, it is an object of the present invention to provide a receiving structure that does not cause a problem in a buried pipeline even if an earthquake or ground deformation occurs.

[0006]

According to the first aspect of the present invention, a rubber ring for sealing is mounted in an annular groove provided on the inner peripheral surface of the enlarged diameter receiving port on the opening end side. In the receiving port structure, a second annular concave groove is provided on the inner peripheral surface of the enlarged diameter receiving port located on the back side of the annular concave groove, and an end face of a resin pipe inserted and connected into the second annular concave groove. Are locked, and a locking ring adapted to release the locking with the end face of the resin tube when an external force of a predetermined level or more is applied is mounted.

(Function) In the socket structure of the first aspect, the second annular groove is formed on the inner peripheral surface of the enlarged diameter receiving port located on the back side of the annular groove in which the rubber ring for sealing is mounted. The end face of the resin pipe to be inserted and connected is locked in the second annular concave groove, and the lock with the end face of the resin pipe is released when an external force of a predetermined level or more acts. Since the locking ring is mounted so that when the worker inserts the end of the resin pipe into the receptacle, the end face of the resin pipe abuts and locks on the locking ring, It is possible to prevent an operator from erroneously inserting the resin tube to the inner side of the receptacle.

[0008] When an external force of a predetermined level or more in the pipe axis direction acts on the buried pipe due to an earthquake, ground deformation, or the like, for example, the locking ring is deformed and the locking with the end face of the resin pipe is released. For this reason, it is possible to cope with the direction in which the resin pipe is pushed in. As a result, it is possible to prevent damage to the enlarged-diameter receiving port or the end of the resin pipe, and to provide a buried pipe excellent in earthquake resistance.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a semi-longitudinal sectional view showing an example of a tube having a socket structure of the present invention.

Reference numeral 1 denotes a hard vinyl chloride resin tube having an enlarged diameter receiving port 2 at one end. The length of the enlarged diameter receiving port 2 in the tube axis direction is set to be longer than that of the conventional rubber ring type enlarged diameter receiving port, and is, for example, about 1.5 times as long. An annular groove 21 is provided along the circumferential direction on the inner peripheral surface on the opening end side of the enlarged diameter receiving port 2, and a rubber ring 3 for sealing is mounted in the annular groove 21. A second annular concave groove 22 having a semicircular cross section is provided along the circumferential direction on the inner peripheral surface of the enlarged diameter receiving port 2 near the back, and the locking ring 4 is mounted in the annular concave groove 22. Have been.

The locking ring 4 is made of polyethylene resin, and is engaged with the end face of the hard vinyl chloride resin pipe 5 inserted and connected into the enlarged diameter receiving port 2 and locked. The locking ring 4 is locked at the end face of the hard vinyl chloride resin pipe 5 at the time of the insertion connection, and is deformed when an external force of a predetermined level or more acts on the buried pipe line due to an earthquake or the like after being buried. What is necessary is just to have a function to release the engagement with the end face of the hard vinyl chloride resin tube 5. For example, the locking ring 4 may be a C-shaped split ring.

Next, a method of connecting the hard vinyl chloride resin pipe 1 will be described. As shown in FIG. 2, when the operator inserts the insertion port of the hard vinyl chloride resin pipe 5 to be inserted and connected into the enlarged diameter receiving port 2 of the hard vinyl chloride resin pipe 1,
Since the end face of the opening of the resin tube 5 comes into contact with the locking ring 4 and is locked, the operator confirms that the resin tube 5 has been inserted.

The locking ring 4 is not deformed by the insertion load force of the resin pipe 5, but is deformed when a pushing load of a predetermined level or more is applied in the pipe axis direction of the pipe due to an earthquake or ground deformation. Thus, the insertion opening of the resin pipe 5 can be moved to the inner side of the enlarged diameter receiving opening 2.

As described above, even if the end of the resin pipe 5 is pushed into the deeper portion of the enlarged diameter receiving port 2 due to an earthquake or ground deformation, it is possible to cope with the damage of the enlarged diameter receiving port 2 or the end of the resin pipe 5. It is excellent in earthquake resistance without occurrence of cracks.

In the above-described embodiment, an example in which the receiving port structure is applied to one end of the pipe body is illustrated. Of course.

[0016]

According to the first aspect of the present invention, the locking ring is mounted in the second annular groove provided on the inner peripheral surface at the substantially central portion in the tube axis direction of the enlarged diameter receiving port. Therefore, the worker can confirm that the end of the resin pipe has been inserted to the predetermined position of the enlarged-diameter receiving port by engaging and locking the end face of the resin pipe to be inserted and connected to the locking ring.

Therefore, it is possible to prevent a worker from forcibly inserting the resin pipe to the deep side of the enlarged diameter receiving port, and even if an external force in the pipe axis direction acts on the buried pipe due to an earthquake or ground deformation. It can respond to both the direction in which the resin tube comes out and the direction in which the resin tube is pushed in. Therefore, it is possible to prevent damage to the enlarged-diameter receiving port or the end of the resin pipe, and to provide a buried pipe excellent in earthquake resistance without causing any trouble in the entire pipe.

[Brief description of the drawings]

FIG. 1 is a semi-longitudinal sectional view showing an example of a tube having a socket structure of the present invention.

FIG. 2 is a semi-longitudinal sectional view of a main part showing a use state of the tubular body of FIG. 1;

[Explanation of symbols]

 1, 5 hard vinyl chloride resin tube 2 enlarged diameter receiving port 21 annular concave groove 22 second annular concave groove 3 rubber ring for sealing 4 locking ring

Claims (1)

[Claims] 1. A receiving structure in which a rubber ring for sealing is mounted in an annular groove provided on an inner peripheral surface on an opening end side of an enlarged diameter receiving port, wherein the sealing rubber ring is mounted on a deeper side than the annular groove. A second annular concave groove is provided around the inner peripheral surface of the located enlarged diameter receiving port. In the second annular concave groove, the end face of the resin pipe to be inserted and connected is locked, and an external force of a predetermined level or more is applied. A receiving port structure, wherein a locking ring adapted to release locking with an end face of a resin tube when actuated is mounted.