JPS605190Y2 - Resin pipe connection joint - Google Patents

Description

[Detailed description of the invention] The present invention is generally used in a large number of installations and uses as supply channels for oil supply, air supply, etc. in automobiles or various machines, equipment, equipment, etc., and is relatively small in diameter with a pipe diameter of about 25 m/m or less. This invention relates to an improvement in the structure of a joint structure for connecting a metal pipe to the end of the pipe.

As shown in FIG. 4, the conventional joint structure is constructed by carving a screw 13 into the outer peripheral surface of the cylindrical hole wall 12 of the joint body 11 made of resin.

Therefore, although the demand for lighter products is satisfied,
At the time of connection, the threaded connection with the metal connecting nut incorporated into the mating pipe lacks a tight-fitting function, resulting in problems and often causes problems such as leakage.

The purpose of the present invention is to provide a resin pipe connection joint that extremely effectively solves the above-mentioned problems. The mounting hole 2 for the tightening bolt is connected to the annular groove 3 provided inside the shaft core, and the upper and lower outer circumferential ends of the hole are parallel to the seating surface. 4, 4', and furthermore, a cylindrical hole wall 5 having a hollow portion communicating with the groove 3 is integrally provided on the circumferential side wall with a tip curved surface serving as an abutting and engaging surface 6 with the end of the pipe. It is made by injection molding from resin material.
A metal screw ring 7 is cast and fixed to the outer peripheral surface of the cylindrical hole wall 5 at the same time as the joint body 1 is injection molded.

As described above, according to the present invention, the metal screw ring 5 is cast and fixed at the same time as the joint body 1 is injection molded using a resin material, which not only reduces the weight of the product, but also makes it particularly suitable for use as a resin joint. Also, it is possible to use a metal connecting nut that is incorporated into the mating pipe side at the connecting portion, and the mutual screwing and tightening can be made even safer and more reliable.

[Brief Description of the Drawings] Fig. 1 is a plan view of a resin pipe connection joint according to an embodiment of the present invention, Fig. 2 is a plan view of another embodiment of the same, and Fig. 3 is a plan view of a resin pipe connection joint according to an embodiment of the present invention. (2) Cross-sectional view along the line, FIG. 4 is a cross-sectional view showing a conventional example. 1... Joint body, 2... Mounting hole, 3
...Concave groove, 4,4'...Parallel bearing surface, 5
...... cylinder hole wall, 6... abutment engagement surface, 7.
...Metal screw ring.

Claims (1)

[Scope of utility model registration request] A hole 2 is connected to the annular groove 3 provided inside and is attached to the shaft core.
is installed through the hole, and this installation is done by making the upper and lower outer circumferential ends of the hole parallel seating surfaces 4, 4', and further making the tip circumferential surface of the circumferential side wall part an abutment engagement surface 6 with the pipe end. , a metal screw ring 7 is cast on the outer peripheral surface of the cylindrical hole wall of the joint body 1, which is formed by injection molding and integrally protruding a cylindrical hole wall 5 having a hollow portion that communicates with the groove 3; A resin pipe connection joint characterized by a fixed structure.