JPS60132200A - Pipe joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a pipe joint that can quickly and reliably join pipes having spiral protrusions on their outer peripheral surfaces.

(Prior Art) A tube having spiral protrusions on its outer circumferential surface has excellent flatness resistance because the protrusions serve as ribs and have a reinforcing effect. For this reason, this type of pipe is widely used as underground piping, but the pipe joints that join these pipes together have not always been satisfactory.

That is, the conventional pipe joint, as shown in a half-sectional view in FIG.
It consisted of a groove on the inner circumferential surface of the short tube that threadedly engaged with a protrusion on the outer circumferential surface of the tube.

Therefore, when connecting pipes 1' and 1 using this pipe joint 2, as shown in the figure, after threading the pipe joint 2 onto one pipe 1, the pipe joint 2 is rotated in the opposite direction. Let the other tube 1
However, the pipe joint 2 had the disadvantage that it was biased towards one pipe end.

Therefore, when vibrations, shocks, etc. are applied to the pipe, there is a problem in that the end of the pipe on the shallower side of the threaded connection separates from the pipe joint.

(Purpose of the Invention) The present invention solves the above-mentioned problems of the conventional pipe joints, and ensures secure connection with both pipe ends, and also prevents separation even when subjected to vibrations, shocks, etc. We provide pipe fittings that never fail.

(Structure of the Invention) Hereinafter, a specific structure of the present invention will be explained with reference to the drawings. FIG. 1 is a half-sectional view showing one embodiment of the present invention, and FIG. 2 is a half-sectional view showing another embodiment, in which reference numeral 1 is a pipe, and A is a pair of joint bodies 2.3. 'b) of the present invention.

The pipe 1 is made of synthetic resin such as vinyl chloride resin or metal such as aluminum or iron, and the inner peripheral surface of the pipe 1 has 1c grooves corresponding to the protrusions 11 as shown in FIG. However, in order to make the water flow smoothly inside the pipe, it is preferable to have a flat surface as shown in FIG.

On the other hand, the joint body 2.3 has the protrusion 11 at one end thereof.
A recessed line 21.31 is provided at the other end to be screwed together, and a normal thread 2 is provided at the other end to be screwed together in a direction opposite to the helical direction of the convex line 11.
2. It has a configuration in which a male screw 32 is provided.

Next, a procedure for joining pipe 1.1 using this pipe joint A will be explained.

First, the end of one pipe 1 is screwed into the four threads 21 of the joint body 2 and joined. Then, the male thread 32 of the other joint body is screwed into the female thread 22 of the joint body 2, and the groove 3
1 and the other end of the tube 1 is screwed together.

The male thread 32 of the joint body 3 and the convex thread 11 of the pipe 1 are reverse threaded, so when the joint body 3 is screwed into the joint body 2, the concave thread 31 and the convex thread 11 are screwed together, and the convex thread 11 of the pipe 1 is threaded. The end is grooved 3
It penetrates deep into 1 and completes the joining. In this joining operation, if the fitting body 3 and pipe 1 cannot be completely screwed together, after completely screwing the fitting body 2.3 together, turn the tube 1 so that the pipe end What is necessary is just to screw and join until it penetrates into the inner part of the grooved line 31.

In this way, the pipes 1.1 are reliably and firmly connected to each other via the pipe fitting A. However, in piping lines that require high watertightness, as shown in Fig. 2 (sealing material such as seal backing or putty) It is recommended to use

In the figure, 4.5 and 6 are sealing materials, and seal backing, butyl rubber, etc. are appropriately selected and used depending on the usage condition. In this case as well, bonding is performed using the same bonding procedure as in the embodiment shown in FIG.

(Effects of the Invention) As detailed above and as shown in section 7j, the pipe joint of the present invention consists of a pair of joint bodies, and one end of each joint body is provided with a concave line that screws into the convex line of the part to be joined, and other parts. Since the ends are provided with field screws and male screws that are screwed together in the opposite direction to the spiral direction of the convex stripes, the screwing with both pipe ends is complete and reliable, and the pipe is protected from vibrations and shocks. Even when such problems occur, the inconvenience of the pipe joints not coming apart as with conventional pipe joints does not occur.

[Brief explanation of drawings]

FIG. 1 is a half-sectional view showing one embodiment of the present invention, FIG. 2 is a half-sectional view showing another embodiment, and FIG. 3 is a half-sectional view showing a conventional pipe joint. 1...Pipe 11...Protrusion 2.3...
...Joint body 21.31...Concave line 22...
...Female thread 32...jJ[Neshi Patent applicant Mitsubishi Plastics Co., Ltd.

Claims (1)

[Claims] A pipe joint for joining pipes each having spiral protrusions provided at a predetermined pitch on their outer peripheral surfaces, each of which is provided with a concave thread that threadably engages with the protrusion at one end of a pair of joint bodies. A pipe joint characterized in that the other end is provided with a female thread and a male thread that screw together in a direction opposite to the helical direction of the protrusion.