JP2008157307A - Hose connector integrated pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hose connector integrated pipe reduced in the material cost and the number of man-hours and, further, reduced in influence on the global environment by integrally forming a volute hose connector with a pipe. <P>SOLUTION: The volute hose connector 12 is integrally formed with an end of a metal raw pipe 11a and a projecting part 15 having a diameter larger than that of the hose connector 12 is formed in a position inside the hose connector 12 in the radial direction by plastically deforming the peripheral wall of the metal raw pipe 11a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe used for forming conduits for various fluids, and more particularly to a hose joint-integrated pipe having a joint for connecting a hose to an end portion of a pipe used for gas equipment.

  Conventionally, pipes for piping used to connect hoses to gas appliances are provided with a bamboo hose-like hose joint at the end of a metal pipe connected to the equipment, and the hose is inserted into this hose joint for connection. It has become.

  FIG.1 (c) shows the conventional common bamboo shoot-like hose coupling 2 provided in the edge part of the said pipe 1, and uses the thick pipe of brass for the raw material, and goes to the pipe 1 at the one end side of this thick pipe. Formed by machining the cylindrical connecting portion 3 having an inner diameter to be fitted, and scraping the remaining portion of the thick pipe to the connecting portion 3 into a bamboo hose-like hose joint 2, and connecting the connecting portion 3 to the end of the pipe 1. It is fixed to the end of the pipe 1 by means of a brazing 4 in a state of being fitted on the pipe.

Another hose joint has been proposed in which a pipe connecting portion is provided at one end of a nipple by cold forging, and a bamboo hose-like hose joint is provided at the other end of the nipple (see, for example, Patent Document 1). .
No. 7-55431

  By the way, the conventional bamboo slag hose joint 2 as described above is cut using a material different from that of the pipe 1 and is attached to the end of the pipe 1 with a brazing 4, so that the copper pipe Since a separate material is required for 1 and the material cost increases accordingly, a process of welding the hose joint 2 to the pipe 1 is required. Therefore, it takes time and effort to fix the pipe 1 and the hose joint 2. There is a problem that it takes.

  Moreover, since the hose joint by a nipple becomes a material different from a pipe like the above, there exists a problem of material cost or a material.

  Furthermore, in recent years, awareness of the global environment has increased, and efforts to reduce the impact on the global environment at the time of disposal have been demanded. However, brass, which is the material of the bamboo hose-like hose joint 2, has the generation of cadmium, a harmful substance. The present situation is that immediate measures such as replacement with harmless materials are desired.

  Accordingly, an object of the present invention is to integrally form a bamboo shoot-like hose joint with the pipe, thereby reducing material costs and man-hours, and reducing the influence on the global environment. Is to provide.

  In order to solve the problems as described above, the present invention employs a configuration in which a hose joint in the shape of bamboo is integrally formed by plastically deforming the peripheral wall of the pipe base pipe at the end of the metal pipe base pipe. Is.

  A copper pipe is used for the pipe base pipe, and an overhanging portion having a diameter larger than that of the hose joint is provided on the outer periphery of the pipe base pipe in the axial direction from the bamboo hose joint. An integrally molded structure can be obtained by plastic deformation.

Here, the bamboo stalk-like hose joint is formed by connecting a plurality of truncated cone-shaped portions with a small diameter on one end side of the pipe base tube in the axial direction, and the large-diameter end portions of each truncated cone-shaped portion are edge-shaped, A non-return function for the hose press-fitted outside is formed.
The overhanging portion serves as a stopper that prevents the hose press-fitted into the hose joint from being inserted further.

  According to the present invention, the bamboo worm-like hose joint is integrally formed by plastically deforming the peripheral wall of the pipe blank at the end of the pipe blank. It is no longer necessary to prepare a separate material from the pipe pipe, which not only reduces the material cost, but also eliminates the conventional brazing process, and manufactures pipes with bamboo shoot-like hose joints. Efficiency can be improved.

  In addition, the bamboo shoot-like hose joint can be made of a material that is integrated with the copper pipe, which is the pipe base pipe, and the impact on the global environment during disposal is reduced compared to the conventional bamboo shoot-like hose joint made of brass. Can do.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIGS. 1 (a) and 1 (b), the hose joint-integrated pipe 11 is used, for example, for connecting a hose such as rubber to a gas device as a gas conduit. A copper pipe having a required length and diameter is used, and a bamboo shoot hose joint 12 is integrally formed at one end thereof.

  The bamboo shoot-like hose joint 12 is formed by plastically deforming the peripheral wall of the pipe element pipe 11a, thereby providing a plurality of truncated cone parts 13 having a small diameter on one end side of the pipe element pipe 11a in a row in the axial direction. The large-diameter end of each frustoconical portion 13 becomes an edge portion 14, and a check function for the hose press-fitted outside is generated.

  In addition, an overhanging portion 15 larger in diameter than the hose joint 12 is integrally formed on the outer periphery of the pipe base tube 11a at a position on the inner side in the axial direction from the bamboo hose-like hose joint 12.

  This overhanging portion 15 is also formed by plastically deforming the peripheral wall of the pipe base tube 11a in the same manner as the bamboo hose-like hose joint 12, so that a hose such as rubber press-fitted into the hose joint 12 cannot be inserted any more. It becomes a stopper.

  The hose joint-integrated pipe 11 of the present invention has the above-described configuration, and is connected to the pipe base pipe 11a on the gas equipment side, and is attached to one end of the pipe base pipe 11a. By inserting the gas hose into the gas hose, it is used for connecting the hose to the gas equipment. The non-removal state of the hose is maintained by a check function for the hose at the large diameter end.

  In addition, the connection part of the hose coupling 12 and the hose makes the connection of the hose more reliable by tightening the connection part with a band or the like from the outside of the hose.

  The formation of the above-described bamboo shoot-like hose joint 12 is achieved by inserting the end of the pipe base tube 11a into a half-cut mold and applying a fluid or mechanical internal pressure to the peripheral wall of the pipe base tube 11a from the inside. Each of the frustoconical shapes can be formed into a multi-stage frustoconical shape that is processed on the inner surface of the mold by plastically deforming the peripheral wall and crimping to the inner surface of the mold. The part 13 can be processed with high accuracy.

  In this way, if the bamboo cocoon-shaped hose joint 12 is integrally formed at one end of the pipe base pipe 11a, the hose joint 12 and the pipe base pipe 11a become the same material, and it is necessary to prepare a material different from the pipe base pipe 11a. Thus, there is an advantage that not only the material cost can be reduced, but also the connecting step by brazing the bamboo stalk-like hose joint 12 to the pipe becomes unnecessary, and the production efficiency of the hose joint-integrated pipe 11 can be improved.

(A) is a front view showing the outer shape of the hose joint-integrated pipe according to the present invention, (b) is an enlarged front view in which the main part is cut out, and (c) is the outer shape of a conventional pipe with a hose joint. Front view showing

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Hose coupling integrated pipe 11a Pipe elementary pipe 12 Bamboo-child-shaped hose coupling 13 Frustum shape part 14 Edge part 15 Overhang | projection part

Claims (2)

  A hose joint integrated pipe integrally formed by plastically deforming a peripheral wall of this pipe base pipe at the end of a metal pipe base pipe.   A copper pipe is used for the pipe base pipe, and an overhanging portion having a diameter larger than that of the hose joint is provided on the outer periphery of the pipe base pipe in the axial direction from the bamboo hose joint. The hose joint-integrated pipe according to claim 1, which is integrally formed by plastic deformation.

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