JPH0830548B2 - Pipe connecting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting device.

[0002]

2. Description of the Related Art The inventor of the present invention completes the connection of pipes by first fitting the necessary members in advance inside the joint body and then inserting the connecting pipes through the openings at both ends of the joint body. In addition, the inventors have made an invention that exhibits airtightness resistance and pullout prevention power.
(Japanese Patent Application No. 63-201754, Japanese Patent Publication No. 5-
This invention is superior in that it can be connected in a so-called one-touch system as compared with a conventional pipe connecting device in which necessary members are fitted inside the joint and finally tightened with screws. However, the holding member of the tube has a bellows type structure, and the spring property generated by the bellows is utilized to push the sphere toward the end of the joint body to determine the biting state of the sphere.

[0003]

The object of the present invention is to replace the use of the spring property of the above-mentioned invention with the tangling of the tongue by the fins, and to utilize the slight movement of the connecting tube to make a spherical body. The object is to provide a pipe connecting device that exhibits the bite state.

[0004]

The means of the present invention are as follows.

A circumferential groove for forming a stopper is formed in the center of the inside of the cylindrical joint body, and a circular groove having a conical surface that gradually expands from the both end insertion ports of the joint body toward the stopper. , A conical groove having a conical surface that gradually narrows toward the stopper, and a conical surface having a conical surface that gradually expands toward the stopper is inserted from both end insertion ports of the joint body. Inserting an elastic holding member having a plurality of rolling spheres for preventing the pipe from coming off and having a fin piece having a tongue piece at the tip to be pressed against the outer peripheral surface of the connecting pipe, is inserted toward the stopper. A bellows type cylindrical packing was inserted into a circumferential groove that formed a gradually narrowing conical surface, and projecting fin pieces with tip tongues that were pressed against the outer peripheral surface of the connecting pipe inserted from both end insertion ports of the joint body. Pipe connecting device.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The right side of FIG. 1 shows a state before a connecting pipe P (hereinafter simply referred to as a pipe) is inserted into a cylindrical joint body 1, and the left side shows the pipe P inside the joint body 1. 2 shows a state in which the tube has slightly moved to the insertion port 2 side due to the action of so-called unsettled after being inserted into the stopper 7 into which the circumferential groove 8 in the middle part of FIG.

In the conventional pipe insertion joint, there is a possibility that the insertion direction of the pipe may be inclined, and the pipe may hit each member installed in the joint, which makes insertion difficult. Therefore, in the present invention, horizontal planes 2a are provided at both ends of the joint main body 1 so that the inserting direction of the pipe is kept horizontal, and the circumferential groove 4 having the conical surface 3 at the tip thereof and the adjacent circumferential groove 4 are opposite to each other. A circumferential groove 10 having a conical surface 9 in the direction is formed. Then, the holding member 6 formed of an elastic body is fitted into the circumferential groove 4, and the bellows type tubular packing 11 is fitted into the circumferential groove 10.

In the illustrated embodiment, the holding member 6 is provided with three fin pieces 6a projecting from the inside thereof, and the tips of the fins are slightly smaller than the outer diameter of the continuous pipe P. However, the inner diameter of the end of the circular annular portion 6b on the front side of the holding member 6 is approximately the same as the inner diameter of the spheres 5a that are rollably inserted into the numerous small holes 5 formed at the base end of the holding member 6. ing.

On the inner surface of the bellows type cylindrical packing 11 fitted in the circumferential groove 10, there are provided five fin pieces 11a having a tip tongue and having the same diameter as the holding member 6 in the illustrated embodiment, and a circular ring is provided on the tip side. A section 12 is provided.

[0010]

In the above structure, when the pipe P is inserted into the insertion opening 2 of the joint body 1, the tip end of the pipe P passes the installation position of the spherical body 5a and hits the fin piece 6a having a diameter smaller than the outer diameter of the pipe P. This deforms and advances, and hits the fin piece 11a of the bellows type cylindrical packing 11, and thus the engagement of the sphere is exhibited by utilizing the slight movement of the tube due to the tangling of the tongue.

[0011]

According to the present invention, when a sphere is shown to be bitten in the gap between the outer peripheral surface of the pipe and the conical surface, it never slips within a certain bending angle due to the characteristics of the sphere.
Utilizing the principle of exerting a strong pulling-out prevention force, the sphere is shown to be in a state of being very naturally bitten, that is, when the fin 6a of the holding member is inserted into the pipe, it is entangled with the outer peripheral surface of the pipe once Although the tip of the holder reaches the stopper, the holding member 6 is in the opposite direction (toward the body end) due to the phenomenon of pipe withdrawal.
To the point where the gap between the outer circumference of the pipe and the conical surface 3 coincides with the diameter of the sphere, and the sphere engages with each other. It is possible to prevent the pull-out movement of the.

In short, the present invention is an invention that is an advance over the above-mentioned invention in that the tubes can be airtightly connected by utilizing the entanglement of the tongue of the fin.

[Brief description of drawings]

FIG. 1 is a vertical side view.

FIG. 2 is a vertical sectional side view of a holding member.

FIG. 3 is a front view of the above.

FIG. 4 is a vertical sectional side view of a bellows type tubular packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint body 2 Insertion port 2a Horizontal surface 3 Conical surface 4 Circular groove 5a Sphere 6 Holding member 6a Fin piece 7 Stopper 8 Circumferential groove 9 Conical surface 10 Circular groove 11 Bellows type tubular packing 11a Fin piece

Claims (1)

[Claims] 1. A pipe connecting device comprising a combination of the following three requirements (a), (b) and (c). (A) A circumferential groove having a conical surface in which a stopper is fitted in the inner center of the cylindrical joint body, and the conical surface gradually expanding from both end insertion ports of the joint body toward the stopper. , A circular groove having a conical surface that gradually narrows toward the stopper is formed at the end of the groove. (B) A plurality of rolling spheres for preventing the connecting pipes inserted from both end insertion ports of the joint body from coming off are arranged in a circumferential groove having a conical surface that gradually expands toward the stopper, and for connection. Inserting an elastic holding member provided with a fin piece having a tongue piece at a tip end that is pressed against the outer peripheral surface of the tube. (C) A bellows projecting a fin piece with a tip tongue piece in pressure contact with the outer peripheral surface of the connecting pipe inserted from both end insertion ports of the joint main body in a circumferential groove forming a conical surface that gradually narrows toward the stopper. Inserted the tubular packing.