JPH07103381A - Flexible pipe fittings - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a pipe joint that can be connected with one touch and the stopper holds the flexible pipe evenly. [Structure] A stopper groove 16 having a tapered inner surface 17 whose diameter increases from the end to the inside is provided on the inner surface of the joint body 10 into which the flexible tube 20 is inserted, and a stopper 50 mounted in this stopper groove 16 and this stopper groove. 16 and the spring mounting chamber 1 for urging the stopper 50 mounted in the spring mounting chamber 15 toward the smaller diameter side of the tapered inner surface 17.
5, a packing chamber 14 is provided on the inner side of the back wall 5 with a wall between them, and a packing 18 is provided to seal the outer surface of a flexible pipe 20 attached to the packing chamber 14, and stoppers 50 are provided on both sides of the annular body. A retainer guide 51 which is connected at a plurality of positions in the circumferential direction and in which the outer surface of the one annular body slidably abuts the inner surface of the joint main body, and both sides of the retainer guide 51 are held between the annular bodies. The inner surface is locked to the outer surface of the flexible tube 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for a flexible pipe having a corrugated outer surface.

[0002]

2. Description of the Related Art Conventionally, there is a joint shown in FIG. 6 disclosed in Japanese Patent Laid-Open No. 61-6491. In connecting this pipe 4, first, the cap nut 2 is inserted into the pipe 4, and then the notch on the circumference of the sleeve 3 is opened so that the wave crest tip of the pipe 4 projects about 1 to 5 peaks. The sleeve 3 is inserted into the inner diameter portion 7 of the joint body, and the cap nut 2 is screwed onto the male screw 9 of the joint body.

When the cap nut 2 is tightened, the diameter of the sleeve 3 is reduced by the tapered surface. Therefore, the sleeve 4 advances toward the inside of the inner diameter portion 7 while holding the tube 4, and the tip 41 of the tube 4 is held.
Collides with the pipe receiving wall portion 8, the protruding pipe portion 42 is sandwiched between the sleeve 3 and the pipe receiving wall portion 8, and the pipe end portion is crushed by the sandwiching portion to be sealed and connected. is there.

[0004]

In the conventional pipe joint, the work of inserting the cap nut 2 into the flexible pipe in advance, the work of mounting the sleeve 3 on the flexible pipe 4 after opening the notch, and the joint of the sleeve 3 with the flexible pipe. Body 1
It is necessary to insert it into the tube, tighten the cap nut, etc.
Had to be attached to the wave mountain, and the sleeve 3 would fall, so the work at the time of connection was complicated and the workability was poor. The present invention provides a pipe joint that can be connected with one touch without adding extra deformation to the flexible pipe, and that the stopper always holds the flexible pipe evenly.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, that is, the inner surface of the joint body into which the flexible pipe is inserted has a taper inner surface whose diameter increases from the end to the back. A stopper groove is provided to mount the stopper groove in the stopper groove, an elastic member for urging the stopper mounted in the spring mounting chamber that follows the stopper groove toward the small diameter side of the inner surface of the taper, and a wall behind the spring mounting chamber. A packing chamber is provided with a space between the packing chamber and an outer surface of a flexible pipe attached to the packing chamber to seal the packing. The outer surface of the annular body is slidably in contact with the inner surface of the joint body, and the retainer guide is mounted by holding both sides between the annular bodies and the inner surface is flexible. A flexible pipe joint outer surface, characterized in that it consists an engaging member that is divided abuts scaled freely in the circumferential direction a plurality pieces to the tapered inner surface with engaging the outer surface.

[0006]

Since the present invention has the above-mentioned structure, when the flexible pipe is inserted from the inlet side of the joint body, the wave crest outer surface of the flexible pipe abuts the inner surface of the stopper locking member and the stopper resists the resilient member. Move to the back of the stopper groove. Since the diameter of the stopper groove is expanded toward the inside, the stopper locking member can be expanded in diameter while being held by the retainer guide. Therefore, if you press the flexible tube hard,
The wave crest outer surface of the flexible pipe gradually climbs over the inner surface of the locking member while expanding the diameter of the locking member of the stopper and enters the main body. The entered flexible pipe pushes against the inner surface of the packing mounted in the packing chamber of the joint body and compresses the packing between itself and the flexible tube to enter the inside of the body.

When the entrance of the pipe is stopped, the stopper is biased toward the small diameter side of the end of the stopper groove by the elastic member, so that the locking member of the stopper is reduced in diameter by the tapered inner surface of the stopper groove, and the inner surface of the locking member. Are fitted and fixed to the wave peaks and valleys of the flexible pipe. In this way, the flexible tube is connected with a sealing property only by inserting the flexible tube into the joint. In particular, the stopper of the present invention holds both sides of the locking member in a freely expandable / contractible manner by the retainer guide, and since the retainer guide is slidably abutted against the inner surface of the main body and is held in the main body, it is circumferentially Even if the divided locking member is pressed by the pipe or pressed by the elastic member and slides in the stopper groove, it is held in the main body in the correct positional relationship. As such, the tube is held with an even holding force on the flexible tube.

[0008]

1 and 2 show an embodiment of the present invention. FIG. 1 shows a state in which a flexible tube is inserted into a main body, and FIG. 2 shows a state after connection. First, the main body 10
Is a nut member 12 screwed to the body member 11 and having an inner diameter larger than the outer diameter of the flexible tube 20, and an O-ring 13 that seals between the body member 11 and the nut member 12.
The packing chamber 14 is formed on the inner surface of the main body member 11. A spring mounting groove 15 and a stopper groove 16 are formed between the main body member and the inner surface of the nut member, and the inner surface of the stopper groove 16 is provided with a tapered inner surface 17 whose diameter increases from the end toward the inner side. . An external seal packing 18 is attached to an end portion of the nut member 12 to provide an external seal when the flexible pipe 20 is attached.

A packing 30 made of an elastic material is mounted in the packing chamber 14.
Has a plurality of protrusions 31 that come into contact with the inner surface of the packing chamber 14 to facilitate compression deformation in the outer diameter direction.
The inner surface is well sealed. The inner surface of the packing 30 abuts the outer surface of the inserted flexible tube 20 and is formed to have an inner diameter smaller than the outer diameter of the tube 20 so that the packing is compressed by the outer surface of the tube 20.

A coil spring 40 having a diameter substantially the same as the inner diameter of the spring mounting groove is mounted in the spring mounting groove 15 on the inner surface of the end of the main body member 11. The coil spring 40 is the packing chamber 1 of the main body member 11.
The stopper 50, which is engaged with the partition wall 19 and is attached to the stopper groove 16, is pressed to the end side.

Stopper 5 mounted in stopper groove 16
0 is composed of a retainer guide 51 that holds a locking member on both sides in the axial direction and a locking member 52 that is held by the retainer guide. As shown in FIGS. 3 and 4, the retainer guide 51 is made of resin in which annular rings 53 and 54 on both sides which are spaced apart are connected by ribs 55 at a plurality of positions in the circumferential direction, and the annular rings 53 and 54 on both sides. A metal locking member 52 is held therein. The locking member 52 is made of metal, and the inner surface is the flexible tube 20.
The outer surface of the retainer guide 51 has a rounded shape, and is an annular shape composed of a plurality of pieces divided at the same position as the connecting rib 55 of the retainer guide 51 in the circumferential direction as shown in FIG. It is mounted between 55 and the annular rings 53, 54 so as to be expandable and contractible.

The annular ring 53 on the end side of the retainer guide 51 has a small outer diameter so as to enter the smaller diameter side of the tapered inner surface of the stopper groove 16, and the annular ring 54 on the inner side has a guide width with the locking member 52. The outer diameter is made larger than the annular ring 53 on the end side so as to be large. Also, when the stopper 50 slidably contacts the inner surface of the nut member 12 of the main body so that the stopper 50 is held in the correct positional relationship in the main body, and the stopper 50 further moves to the end side of the stopper groove 16, It is formed with a long width toward the back side so as to be in contact with the inner surface of the main body and serve as a guide.

[0013]

As described above, since the flexible pipe joint of the present invention can be connected only by inserting the flexible pipe, the workability at the time of connection is improved and work mistakes are eliminated. Also, even if the stopper copes with the large difference in inner and outer diameters of the flexible pipe wave and slides inside the body, the stopper is always held in the main body in the correct positional relationship and the expansion and contraction diameter is performed, so a uniform holding force is applied to the flexible pipe. Therefore, the retaining lock is performed to ensure a reliable connection.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state when a flexible tube is inserted into a main body.

FIG. 2 is a cross-sectional view showing a state after the flexible tube is inserted into the main body.

FIG. 3 is a front view showing a retainer guide 51.

FIG. 4 is a partial cross-sectional view of FIG.

FIG. 5 is a front view showing a locking member 52.

FIG. 6 is a cross-sectional view showing a conventional flexible tube.

[Explanation of symbols]

 10 joint body 11 body member 12 nut member 13 O-ring 14 packing chamber 15 spring mounting chamber 16 stopper groove 17 taper inner surface 18 T-type packing 19 partition wall 20 flexible tube 30 packing 31 packing protrusion 40 coil spring 50 stopper 51 retainer guide 52 Stop member 53, 54 Annular member 55 Connection rib

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiichiro Sakumi 382, Yanagi-cho, Kubiki-mura, Nakakubiki-gun, Niigata Prefecture (72) Inventor Shin-ichi Kamata 3-1-21-108 Kamuigusa, Suginami-ku, Tokyo (72) Anamizu Takashi 21 Noto-cho, Shinjuku-ku, Tokyo 404 Hidence 404 (72) Inventor Mamoru Saito 1-11-11 Unoki, Ota-ku, Tokyo (72) Inventor Fumitaka Sato 3-27-15 Nishi-Ichinoe, Edogawa-ku, Tokyo

Claims (1)

[Claims] 1. A stopper groove having a tapered inner surface, the inner diameter of which is inserted into a flexible pipe of a joint body, the inner diameter of which extends from the end toward the inner side, and a stopper attached to the stopper groove, and a spring attached to the stopper groove. An elastic member that urges the stopper mounted in the chamber toward the smaller diameter side of the inner surface of the taper, and a packing chamber with a wall at the inner side of the spring mounting chamber with a wall separating the packing from the flexible pipe mounted in the packing chamber. The stopper is a retainer guide in which annular bodies on both sides provided at intervals are connected at a plurality of circumferential positions, and an outer surface of the one annular body slidably contacts an inner surface of the joint body. Both sides of the retainer guide are held and mounted between the annular bodies, the inner surface is locked to the outer surface of the flexible pipe, and the outer surface abuts the tapered inner surface so that the retainer guide can expand and contract in the circumferential direction. Fitting for a flexible pipe, characterized in that it consists of an engaging member which is divided into several pieces.