JP3252559B2 - Flexible pipe fittings - 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 joint for a flexible pipe having an outer surface formed in a corrugated shape.

[0002]

2. Description of the Related Art Conventionally, there is a joint shown in FIG. 6 disclosed in Japanese Patent Application Laid-Open No. 61-6491. In connecting the pipe 4, the cap nut 2 is first inserted into the pipe 4, and then a notch on the circumference of the sleeve 3 is opened to make the wave crest tip of the pipe 4 protrude by about 1 to 5 ridges. The sleeve 3 is inserted into the inner diameter portion 7 of the joint main body, and the cap nut 2 is screwed with the external thread 9 of the joint main body.

[0003] When the cap nut 2 is tightened, the sleeve 3 is reduced in diameter by the tapered surface.
Abuts against the tube receiving wall portion 8, the protruding tube portion 42 is sandwiched between the sleeve 3 and the tube receiving wall portion 8, and the tube end is crushed and sealed at the sandwiching portion to perform connection. is there.

[0004]

In the conventional pipe joint, the operation of inserting the cap nut 2 into the flexible tube in advance, the operation of opening the notch of the sleeve 3 and then attaching the sleeve 3 to the flexible tube 4, and the joint of the sleeve 3 with the flexible tube are performed. Body 1
It is necessary to perform operations such as fitting into the sleeve, tightening the cap nut, and the like.
Therefore, the work at the time of connection was complicated, and the workability was poor. The present invention provides a pipe joint which can be connected with one touch and without adding extra deformation to a flexible pipe, and in which a stopper always holds the flexible pipe uniformly.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, that is, the joint body has a tapered inner surface which expands in diameter from the end toward the back on the inner surface where the flexible tube is inserted. A stopper groove provided in the stopper groove, a resilient member for urging the stopper mounted in the spring mounting chamber following the stopper groove toward the small diameter side of the tapered inner surface, and a wall on the back side of the spring mounting chamber. A sealing chamber and an outer surface of a flexible tube mounted in the packing chamber, and a seal for sealing.The stopper is formed by connecting annular members on both sides provided at intervals at a plurality of positions in the circumferential direction. A retainer guide in which the outer surface of the annular body is slidably abutting against the inner surface of the joint body, and both sides are held between the annular bodies of the retainer guide, and the inner surface is a flexible pipe. 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]

According to the present invention having the above construction, when the flexible pipe is inserted from the inlet side of the joint main body, the wave crest outer surface of the flexible pipe abuts against the inner surface of the stopper locking member, and the stopper opposes the resilient member. Move to the back of the stopper groove. Since the diameter of the stopper groove is increased toward the back, the locking member of the stopper can be freely expanded while being held by the retainer guide. Therefore, if you push the flexible tube hard,
The wave crest outer surface of the flexible tube passes over the inner surface of the locking member one after another while expanding the locking member of the stopper, and enters the main body. The entered flexible pipe presses against the inner surface of the packing mounted in the packing chamber of the joint main body, and moves into the back of the main body while compressing the packing with the main body.

When the entry of the pipe is stopped, the stopper is urged by the elastic member toward the small end of the stopper groove, so that the locking member of the stopper is reduced in diameter by the taper inner surface of the stopper groove, and the inner surface of the locking member is reduced. Is fitted and fixed to the wave valleys and valleys of the flexible tube. Thus, the flexible pipe is connected with a sealing property only by inserting the flexible pipe into the joint. In particular, the stopper of the present invention holds both sides of the locking member so as to be able to expand and contract with a retainer guide, and the retainer guide is slidably contacted with the inner surface of the main body and held in the main body, so that the circumferential direction Even if the divided locking member is pressed against the tube or pressed by the resilient member and slides in the stopper groove, the divided locking member is held by the main body in the correct positional relationship. As a result, the tube is held with a uniform 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 body 10
A nut member 12 screwed to the main body member 11 and having an inner diameter larger than the outer diameter of the flexible tube 20; and an O-ring 13 for sealing between the main 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 back. . An external seal packing 18 is attached to the end of the nut member 12 to perform external sealing when the flexible tube 20 is attached.

A packing 30 made of an elastic material is mounted in the packing chamber 14.
Has a plurality of projections 31 that come into contact with the inner surface of the packing chamber 14 so that compression deformation in the outer radial direction can be easily performed.
The sealing with the inner surface is performed well. The inner surface of the packing 30 is in contact with the outer surface of the inserted flexible tube 20 and has an inner diameter smaller than the outer diameter of the tube 20 so that the packing is compressed on the outer surface of the tube 20.

A coil spring 40 having substantially the same diameter 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 provided in the packing chamber 1 of the main body member 11.
The stopper 50, which is engaged with the partition wall 19 and attached to the stopper groove 16, is pressed toward the end.

The stopper 5 mounted on the stopper groove 16
Reference numeral 0 denotes a retainer guide 51 for holding the locking members on both sides in the axial direction, and a locking member 52 held by the retainer guide. The retainer guide 51 is made of resin in which annular rings 53 and 54 on both sides spaced from each other as shown in FIGS. 3 and 4 are connected by a plurality of ribs 55 in a circumferential direction. Inside, a metal locking member 52 is held. The locking member 52 is made of metal and has an inner surface which is a flexible tube 20.
The outer surface of the retainer guide 51 is formed in a ring shape having a plurality of pieces divided at the same position as the connection rib 55 of the retainer guide 51 in the circumferential direction as shown in FIG. 55 and between the annular rings 53 and 54 so as to be able to expand and contract.

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

[0013]

As described above, since the connection for the flexible pipe joint of the present invention is performed only by inserting the flexible pipe, the workability at the time of connection is improved and the work error is eliminated. Also, even if the stopper slides inside the main body in response to the large difference between the inner and outer diameters of the flexible tube wave peak, the stopper is always held in the main body in the correct positional relationship and the diameter is enlarged, so the uniform holding force on the flexible tube As a result, the retaining locking is performed, and a secure connection is performed.

[Brief description of the 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 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 sectional view of FIG. 3;

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

FIG. 6 is a sectional view showing a conventional flexible pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Joint main body 11 Main body member 12 Nut member 13 O-ring 14 Packing chamber 15 Spring mounting chamber 16 Stopper groove 17 Tapered inner surface 18 T-shaped packing 19 Partition wall 20 Flexible pipe 30 Packing 31 Packing projection 40 Coil spring 50 Stopper 51 Retainer guide 52 Stop member 53, 54 Annular member 55 Connecting rib

Continuing on the front page (72) Inventor Takashi Anamizu 404, High-Dense 404, Nido-cho, Shinjuku-ku, Tokyo 3-27-15 Ichinoe Examiner Toshihide Abe (56) Reference: Japanese Utility Model Application No. 4-138191 (JP, U) Japanese Utility Model Application No. 4-58697 (JP, U) Japanese Utility Model Application No. 3-1255984 (JP, U) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) F16L 33/00-33/26

Claims (1)

(57) [Claims] 1. A stopper groove having a tapered inner surface that expands in diameter from an end to an inner surface of a joint body in which a flexible pipe is inserted, a stopper mounted in the stopper groove, and a spring mounted following the stopper groove. A resilient member for urging the stopper mounted on the chamber toward the small diameter side of the inner surface of the taper, and a packing chamber provided with a wall behind the spring mounting chamber with a wall interposed therebetween, and a seal for sealing with an outer surface of the flexible pipe mounted in the packing chamber. The stopper is a retainer guide in which annular members on both sides provided at intervals are connected at a plurality of circumferential positions, and an outer surface of the one annular member slidably contacts an inner surface of the joint body, The retainer guide is held and mounted on both sides between the annular members, and the inner surface is locked to the outer surface of the flexible tube, and the outer surface is in contact with the inner surface of the taper so that it 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.