JP2003065472A - Flexible pipe holding tool for pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe holding tool 15 capable of fastening a pipe 23 more rigidly than conventional. SOLUTION: Since the pipe holding tool 15 is fastened by pressing a protruding streak 20 by a cap nut 12, namely, a contact area between the cap nut 12 and the pipe holding tool 15 becomes small, and as a result, frictional resistance between the cap nut 12 and the pipe holding tool 15 becomes small, the pipe 23 can be fastened more rigidly than conventional by the pipe holding tool 15.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible tube holder for a pipe joint. 2. Description of the Related Art Heretofore, the following are known as this type of tube holder. It is known that the center line is directed in the front-rear direction and has an incomplete cylindrical shape having a slit extending in the front-rear direction, and the outer peripheral surface is formed in a truncated cone shape having a small diameter at the front end side. [0003] The use of the prior art will be described below. After fitting a cap nut at the rear end of the pipe with the center line directed in the front-rear direction, with the female screw part located on the rear side from the rear, then at the rear end of the pipe, the front end from the rear Fit the tube holder with facing forward. Thereafter, the rear end of the pipe is inserted into the pipe joint, and then a cap nut (pressing tool) is screwed into the male thread portion of the pipe joint body. By this operation, the pipe holder is pushed toward the center by the wedge action by the cap nut and is confined (immobilized) between the pipe and the cap nut. In this way, the tube is connected to the fitting. Disadvantages of the prior art The conventional tube holder has the following disadvantages. Since the outer peripheral surface of the pipe holder was the outer surface of the truncated cone as a whole, the contact area with the inner peripheral surface of the cap nut was increased, and as a result, the frictional resistance between the cap nut and the pipe holder was increased. And the force for pushing the tube holder toward the center is reduced by the frictional resistance, so that the tube cannot be firmly tightened by the tube holder. The present invention employs the following means in order to solve the above-mentioned drawbacks. The invention according to claim 1 is provided with an incomplete cylindrical main body having a slit extending in the front-rear direction with the center line directed in the front-rear direction, and provided on the outer peripheral surface of the main body such that the longitudinal direction is directed in the front-rear direction. An imaginary plane having at least two ridges, wherein an outer surface of the ridge facing the outer peripheral surface of the main body is formed as an inclined surface which is inclined downward toward the front, and has a center line at the center line of the main body. It is designed to be located within the outer peripheral surface of the truncated cone. According to the present invention, the following effects can be obtained by the above configuration. According to the first aspect of the present invention, since the ridge is pushed by the cap nut to tighten the pipe holder, that is, the contact area between the cap nut and the pipe holder is reduced, and as a result, the cap nut Since the frictional resistance between the pipe holding member and the pipe holding member is reduced, the pipe holding member can tighten the pipe more firmly than before. An embodiment of the present invention will be described below. In this description, “front” refers to the right side in FIG. 1 and “back” refers to the left side in FIG. The pipe joint 1 has a metal body 3 having a passage 4 penetrating in the front-rear direction, and a pipe connection portion 6 having a male thread on the outer peripheral surface, which is provided on the rear surface of the main body 3 in a rearwardly protruding manner.
And a cylindrical male screw portion 7 having a male screw on the outer peripheral surface, which is continuously provided on the front surface of the main body 3 in a protruding manner, and an O fitted in an annular groove 9 formed on the inner peripheral surface of the male screw portion 7. A gasket 10 made of a ring or the like, and a male screw 7
The cap nut 12 has a tapered surface 13 in which the front side of the inner peripheral surface is narrowed forward, and the flexibility of the shape stored in the cap nut 12 is opposed to the tapered surface 13. And a tube holder 15 made of synthetic resin or the like. The pipe holder 15 has an imperfect cylindrical main body 19 having a slit 18 extending in the front-rear direction with the center line 17 oriented in the front-rear direction, and an outer peripheral surface of the main body 19 having a longitudinal direction in the front-rear direction. At least two, in this embodiment, eight ridges 20 provided to face the main body 19
And a flange 21 provided at the rear end. The slit 18 is also formed in the flange 21. An outer surface 20a of the ridge 20 facing the outer peripheral surface of the main body 19 is formed as an inclined surface which is inclined downward toward the front, and is formed inside the outer peripheral surface of the virtual truncated cone having the center line 17 as a center line. It is made to be located in. A tube 23 is fitted in the tube holder 15. When the cap nut 12 is screwed into the male thread portion 7 of the main body 3 of the pipe joint 1, the pipe holding member 15 is moved to the center side (toward the center line 17) by the wedge action of the cap nut 12.
And locked between the tube 23 and the cap nut 12 (made immobile). In this way, the pipe 23 is connected to the main body 3 of the fitting 1. In this state, the rear end of the tube holder 15 comes into contact with the front end of the male screw portion 7. [Modifications and the like] Modifications and the like will be described below. (1) The structure of the pipe joint 1 is arbitrary as long as the pipe joint 1 has a type that requires the pipe holder 15 as a necessary component. (2) The shape of the cap nut 12 is also optional. (3) The flange 21 may or may not be provided. (4) The structure of the pipe connection part 6 is optional. (5) Small annular projections may be formed at predetermined intervals in the front-rear direction on the inner peripheral surface of the main body 19 so that the main body 19 of the pipe holder 15 and the pipe 23 are easily brought into close contact with each other.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view taken along line II-II of FIG. 1 and showing only a pipe holder. [Description of Signs] 1 pipe joint 15 pipe holder 17 center line 18 slit 19 main body 20 ridge 20a outer side surface 23 pipe

Claims (1)

Claims 1. An imperfect cylindrical main body having a center line oriented in the front-rear direction and a slit extending in the front-rear direction, and a longitudinal direction oriented on the outer peripheral surface of the main body. And at least two ridges provided, and
A pipe joint in which an outer surface facing the outer peripheral surface of the main body is formed as an inclined surface that is inclined downward toward the front, and is located within the outer peripheral surface of the virtual truncated cone with the center line of the main body as the center line. Flexible tube holder for use.