JPH0623827Y2 - Pipe fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pipe joint used in a device utilizing fluid pressure.

[Prior Art] A conventionally known pipe joint includes, as shown in FIG. 5, a synthetic resin joint body 1 having a flow path 2 and tube connection ports 3 ,. The fitting main body 1 is provided with a metal driving half 5 press-fitted into one end of the flow path, and the annular locking portion 6 on the outer peripheral surface of the driving half is bited into the inner surface of the peripheral wall of the joint main body 1 to integrate them. Are bound to.

However, since the annular locking portion 6 does not have a rotation preventing function, the joint body 1 and the driving half 5 are relatively rotated, and further, the outer peripheral surface of the driving half 5 is slightly projected. It is extremely difficult to give the annular locking portion 6 a rotation preventing function.

[Problems to be Solved by the Invention] An object to be solved by the present invention is to provide a pipe joint in which relative rotation between the joint body and the driving half is reliably prevented.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a joint body made of synthetic resin having a flow channel, and a metal driving half attached to one end of the flow channel of the joint body. In the pipe joint provided with, the joint body is provided with a plurality of legs on the mounting side of the driving half, the outer peripheral surface of which has a locking collar portion on the outer surface of the front end to form a polygonal shape. Is provided with a polygonal portion having substantially the same shape as the polygonal shape formed by the plurality of legs, and a locking step portion with which the locking collar portion at the tip thereof is locked, and the joint body and the driving half are It is characterized by being connected by a press-fitting ring that is press-fitted into the leg of the.

[Operation] Since the driving half has a polygonal portion having substantially the same shape as the polygon composed of a plurality of legs, the sides of both polygons face each other, so the relative rotation of the joint body and the driving half is ensured. Can be prevented.

Further, the engagement between the engagement flange and the engagement step can prevent the driving half from coming out of the joint body, and the press-fit ring reinforces the leg.

[Embodiment] FIG. 1 to FIG. 4 show an embodiment of the present invention. This pipe joint includes a joint body 11 made of synthetic resin and a driving half made of metal.
12 and a press-fitting ring 13.

The joint body 11 is provided with an axial flow path 15 that is open at the mounting side of the driving half 12 and a plurality of tube connection ports 16 that communicate with the flow path 15, and is inserted into the driving half 12. A plurality of legs 17, .. ・ are formed in the tip part by axial grooves, and the outer surfaces of these legs 17, ... Are polygonal as a whole (regular hexagon in the example shown). A locking brim portion 18 is formed on the outer periphery of the tip end of 17.

The driving half 12 has a mounting portion 21 for screwing a fluid device (not shown) on the outer peripheral surface, and a tool hooking portion 22 for hooking a rotary tool such as a spanner, and is formed on the inner peripheral surface. , A polygonal portion 23 having substantially the same shape as the polygonal shape constituted by a plurality of legs 17, ... And a locking step portion 24 at the tip of the polygonal portion 23 are formed. Further, the press-fitting ring 13 has an outer diameter slightly larger than the circle formed by the inner peripheral surfaces of the legs 17, ... And has an annular locking claw portion 26 on the outer peripheral surface.
Are integrally formed.

A union nut 31 having a sleeve 32 is screwed into the tube connection port 16, and by tightening the union nut 31, the sleeve 32 causes the tube 33 to attach to the tube 33.
The tube 33 can be attached by pressing against a, and the tube 33 can be pulled out from the tube attachment portion 16a by loosening the union nut 31 and releasing the pressing of the tube 33 by the sleeve 32.

However, the tube connection port is not limited to the above configuration.

Reference numeral 26 in FIG. 1 is a seal ring for sealing between the joint body 11 and the driving half 12.

In the above embodiment, when the legs 17, ... Are matched with the polygonal portion 23 of the driving half 12 and pushed into the driving half 12, the locking flanges 18 ,. 24, then legs 17, ...
By press-fitting the press-fitting ring 13 inside,
And the driving half 12 is firmly connected.

In the pipe joint, the polygonal portion 23 of the driving half 12 and the respective sides of the polygon formed by the legs 17, .. ,
The locking between the locking step portion 24 and the locking step portion 24 prevents the stopper from coming off in the axial direction. Since the legs 17, ... Are reinforced by the press-fitting ring 13, damage to the legs 17 ,.

In this case, even if the press-fitting ring 13 rotates with respect to the legs 17, ..., It has nothing to do with the connection between the joint body 11 and the driving half 12.

[Advantage of the Invention] In the pipe joint of the present invention, the outer circumference of the plurality of legs of the joint body is made polygonal as a whole, and the driving half is formed with a polygonal portion having substantially the same shape as the polygonal shape described above. By making the squares face each other, relative rotation of the joint body and the driving half can be reliably prevented, and the driving half can be prevented from slipping out by the locking flange and the locking step. Therefore, the joint body and the driving half can be firmly coupled.

Further, the press-fitting rings press-fitted into the plurality of legs can prevent the diameter reduction of the legs and can reinforce them.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a sectional view taken along the line AA of FIG. 2, FIG. 2 is an enlarged back view, and FIG. 3 is a partial longitudinal sectional view of an essential part. 4 is a sectional view taken along line BB in FIG.
It is a longitudinal cross-sectional view which shows the principal part of the known pipe joint of FIG. 11 …… Coupling body, 12 …… Driving half, 13 …… Press-fit ring, 15 …… Fluid passage, 17 …… Leg, 18 …… Locking collar part, 23 …… Polygonal part, 24 …… Locking Step.

Claims (1)

[Scope of utility model registration request] 1. A pipe joint comprising a synthetic resin joint main body having a flow passage and a metal driving half attached to one end of the flow passage of the joint main body, wherein the joint main body is a driving half. On the mounting side of the, a plurality of legs having a locking flange portion on the outer surface of the tip and an outer peripheral surface forming a polygonal shape as a whole are provided, and the driving half is substantially the same shape as the polygonal shape composed of the plurality of legs. A polygonal portion and a locking step portion for locking the locking collar portion at the tip thereof, wherein the joint body and the driving half are connected by a press-fitting ring press-fitted into a plurality of legs, Pipe fittings characterized by.