JPH0680087U - Detachment prevention fitting - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pipe joint capable of reliably preventing the pipe from coming out. [Structure] An annular groove 11 is provided on the inner peripheral surface of the receiving port 1, and a tapered inclined surface 12 is provided on the opening side of the annular groove 11. Then, the wedge-shaped locking ring 4 is brought into contact with the inclined surface 12, and the rubber ring 3 is pressed against the back surface of the locking ring 4. [Effect] The structure is simple and the pipe can be securely prevented from coming out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe joint capable of reliably preventing a spigot from coming out of a socket when pipes are connected to each other via a rubber ring.

[0002]

[Prior art]

 In Japanese Examined Patent Publication No. 50-35685, a rubber ring is attached to an annular groove provided on the inner peripheral surface of the receiving port, and the inlet inserted into the receiving port is connected through the rubber ring, and at the same time, A pipe joint has been proposed in which a retaining ring with a V-shaped cross section attached to the inner peripheral surface is locked to the outer surface of the spigot to prevent the pipe from slipping out.

[0003]

[Problems to be solved by the device]

 However, in this separation prevention pipe joint, an annular groove for mounting the rubber ring and an annular groove for mounting the retaining ring must be provided separately on the inner peripheral surface of the receiving port, so There was a problem that the structure became complicated.

The present invention has solved the above problems, and provides a pipe joint having a simple structure and capable of reliably preventing the outlet from coming out of the receiving port.

[0005]

[Means for Solving the Problems]

 The present invention is a pipe joint in which a rubber ring is attached to an annular groove provided on an inner peripheral surface of a receiving port, and a spigot inserted in the receiving port is connected through the rubber ring. A tapered inclined surface is provided on the opening side, a wedge-shaped locking ring is brought into contact with the inclined surface, and the rubber ring is pressed against the back surface of the locking ring.

[0006]

[Action]

 With the above configuration, when the insertion port is inserted into the receiving port, the rubber ring is compressed, and the pressing force of this rubber ring acts on the back surface of the locking ring. Then, the locking ring pressed against the inclined surface contracts in diameter, and the locking ring comes into pressure contact with the outer peripheral surface of the opening.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a half sectional view showing an embodiment of the present invention, and FIG. 2 is a half sectional view showing a state in which pipes are connected to each other. Reference numerals a and b in the figure are tubes made of synthetic resin, metal, or the like, in which an enlarged diameter receiving port 1 is provided at the end of one tube a, and the insertion port 2 of the other tube b is inserted into the receiving port 1. Form as you can.

Further, an annular groove 11 is provided on the inner peripheral surface of the receiving opening 1, and a tapered inclined surface 12 is provided on the opening side of the receiving opening 1. An inclined surface 13 that reduces in diameter is provided. The rubber ring 3 is mounted on the inner side of the annular groove 11 having the trapezoidal cross section, and the wedge-shaped locking ring 4 is brought into contact with the inclined surface 12 on the opening side.

A lip 31 is provided on the inner peripheral surface of the rubber ring 3, and the lip 31 elastically comes into pressure contact with the outer peripheral surface of the spigot 2. On the other hand, the locking ring 4 is made of rubber, synthetic resin, or the like that is harder than the rubber ring 3, and can be reduced in diameter in the radial direction. Further, the inner peripheral surface of the locking ring 4 is formed to have substantially the same diameter as the outer diameter of the spigot 2, and a slip preventing projection 41 is provided on the inner peripheral surface thereof.

As shown in FIG. 1, in the pipe joint of the present invention, the rubber ring 3 is in contact with the back surface of the locking ring 4 before the insertion port 2 is inserted into the receiving port 1. Then, when the insertion port 2 is inserted into the reception port 1, the lip 31 of the rubber ring 3 is pressed against the outer peripheral surface of the insertion port 2 and reliably sealed. At this time, the rubber ring 3 is compressed in the radial direction, so that the pressing force in the tube axis direction acts on the rear surface of the locking ring 4 as indicated by the arrow X in FIG. Then, the retaining ring 4 is pressed against the inclined surface 12 on the opening side to reduce the diameter, and the slip preventing projection 41 on the inner peripheral surface thereof is pressed against the outer peripheral surface of the inlet 2 to ensure that the outlet 2 comes out. To be prevented.

[0011]

As described in detail above, in the pipe joint of the present invention, the rubber ring presses against the outer peripheral surface of the spigot when the spigot is inserted into the spigot. Then, the pressing force of this rubber ring acts on the back surface of the locking ring, and the contracted locking ring comes into pressure contact with the outer peripheral surface of the opening, so that simply inserting the opening into the receiving port It is possible to reliably prevent the seal and the pipe from coming off.

[Brief description of drawings]

FIG. 1 is a half sectional view showing an embodiment of the present invention.

FIG. 2 is a half sectional view showing a connected state of pipes.

[Explanation of symbols]

 1 Receptacle 2 Outlet 3 Rubber ring 4 Locking ring 11 Annular groove 12 Sloping surface

Claims (1)

[Scope of utility model registration request] 1. An annular groove (1) provided on an inner peripheral surface of a receptacle (1).
A pipe joint in which a rubber ring (3) is attached to 1), and a spigot (2) inserted into the receiving port (1) is connected via the rubber ring (3), the annular groove (11) A tapered conical surface (12) is provided on the opening side of the, the wedge-shaped locking ring (4) is brought into contact with the inclined surface (12), and the rubber is provided on the back surface of the locking ring (4). A separation prevention pipe joint, characterized in that a ring (3) is brought into pressure contact.