JPS5810065Y2 - Cantugate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe joint that can connect synthetic resin gutters and thin-walled synthetic resin pipes without using adhesive during construction.

Conventionally, when connecting synthetic resin pipes without using an adhesive, a flange projecting inward from the periphery is attached to the end 2' of the pipe joint 1', as seen in Japanese Patent Publication No. 45-14746. A fitting tube 3' having a rim 4' is fitted therein, and an elastic ring 5' is held in the gap between the end 2' of the pipe joint 1' and the flange edge 4' of the fitting tube 3'. It is known that the end of an elastic ring 5' is brought into contact with the outer wall surface of a pipe 6' inserted into a pipe joint 1' to connect the pipe 6' in a watertight manner.

However, in conventional pipe joints, the elastic ring body 5' is held in the gap between the end 2' of the pipe joint 1' and the flange 4' of the fitting tube 3', so the wall thickness of the pipe joint 1' is made small. Therefore, the elastic ring body 5' must be held stably, which has the disadvantage that it cannot be used in, for example, synthetic resin gutters or thin synthetic resin pipes.

The purpose of the present invention is to eliminate the above-mentioned drawbacks and to provide a pipe joint that can be connected, for example, to synthetic resin gutters or thin-walled synthetic resin pipes, without using adhesive during construction using an elastic ring. do.

The gist of the present invention is that the expansion cylinder part of a tube body is formed with an expansion cylinder part at the end of the tube, and a stepped part is formed at the base of the expansion cylinder part.
A fitting tube having an inner diameter that is smaller than the outer diameter of the expanding tube portion is fitted, and a rim of the fitting tube on the tube end side of the tube body has a flange that projects inward. The present invention is a pipe joint in which an elastic ring body is fitted into a circumferential groove formed by the stepped portion of the tube body, the expanding tube portion, and the flange edge of the fitting tube.

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1A shows a tube body, in which an expandable cylindrical portion 1 is formed at the end of the tube, and a stepped portion 2 is formed at the base of the expandable cylindrical portion 1.
A small circumferential groove 3 is formed on the outer wall surface of the expandable tube portion 1.

B is a fitting tube that is fitted into the tube body A, and a small protrusion 4 that is to be fitted into the small circumferential groove 3 of the expansion tube portion 1 is provided on the inner wall surface of the fitting tube B. A flange 5 extending inward is formed on the periphery of one end of the fitting cylinder B.

An opening 6 is formed by the periphery of the flange 5, and the diameter of the opening 6 is approximately equal to the inner diameter of the base of the tube A.

The fitting cylinder B is fitted into the expansion cylinder part 1 of the tube body A, and the circumferential groove is formed by the stepped part 2 of the tube body A, the expansion cylinder part 1 and the flange edge 5 of the fitting cylinder B. 7 is formed.

Reference numeral 8 denotes an elastic ring made of a highly elastic material such as synthetic rubber or natural rubber, and the cross-sectional shape is circular, elliptical, rectangular, or has several protrusions. It is fitted into a circumferential groove 7 formed by the stepped portion 2 of the tubular body A, the expansion tube portion 1, and the flange edge 5 of the fitting tube B.

The elastic ring 8 is fitted into the circumferential groove 7, and one end of the elastic ring 8 projects inward beyond the inner diameter of the tube A and the periphery of the flange 5. .

When the pipe end 9 of the synthetic resin pipe or the synthetic resin pipe C is inserted into the opening 6 of the fitting tube B, the outer wall of the pipe end 9 is pressed against the elastic ring 8 and bonded. The synthetic resin downpipe or the synthetic resin pipe C is connected to the pipe body A without using any agent, and the connection is watertight and allows for expansion and contraction movement due to temperature changes.

To fit the fitting tube B into the expandable tube section 1 of the tube body A, fit the small protrusion 4 of the fit tube B into the small circumferential groove 3 of the expandable tube section 1 as described above. Instead, as shown in Fig. 2, the protrusion 10 protruding from the lower end of the fitting cylinder B is engaged with the stepped part 11 formed on the outer wall surface of the expandable cylinder part 1 of the tube body A. Good too.

Further, as shown in FIG. 3, the outer wall surface of the expandable tube portion 1 of the tube body A and the inner wall surface of the fitting tube B are adhered with adhesive 12 to form the expandable tube portion 1,
The elastic ring body 8 may be fitted into the circumferential groove 7 formed by the step portion 2 and the collar edge 5 and then shipped to the construction site.

Furthermore, as shown in FIG. 4, threads 13 are provided protrudingly on the outer wall surface of the expandable tube portion 1 of the tube body A and the inner wall surface of the fitting tube B, so that the fitting tube B is connected to the expandable tube portion 1 of the tube body A. It may be screwed onto part 1.

Also, as shown in FIG.
A plurality of protrusions 14 having a diameter of 5 are protruded, and a recess 16 into which the bulge 15 can be fitted is formed on the outer wall surface of the expansion tube 1. may be fitted.

Further, as shown in FIG. 6, a plurality of protrusions 17 having bent portions 18 bent in the transverse direction are protruded from the lower end of the fitting tube B to the tip, and the protrusions 17 are provided on the outer wall surface of the expanding tube portion 1. A locking protrusion 19 capable of locking the bent portion 18 is provided protrudingly, and the bent portion 18 is attached to the locking protrusion 19.
may be locked.

Further, as shown in FIG. 7, a recess 20 is formed at the inner base of the flange 5 of the fitting cylinder B, and the upper end of the expanding cylinder 1 is fitted into the recess 20, and the fitting is prevented by temperature change or impact. It may be arranged so that the joint tube B cannot be removed.

In the pipe joint of the present invention, an expandable cylindrical portion is formed at the end of the tube, and a stepped portion is formed at the base of the expandable cylindrical portion of the pipe body. A fitting tube having an inner diameter similar to that of the Japanese dog is fitted, and a flange extending inward is formed on the circumferential edge of the fitting tube on the tube end side of the tube body. Since the elastic ring is fitted into the circumferential groove formed by the stepped part, the expanding cylinder part, and the flange edge of the fitting cylinder, it can be used as a joint for, for example, synthetic resin pipes or thin-walled synthetic resin pipes. Even when applied, the elastic ring body is stably held within the circumferential groove, and the pipes can be connected watertightly without using adhesive during construction, and can be expanded and contracted freely.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an example of the pipe joint of the present invention in use, Figures 2 to 4 are cross-sectional views of the joint showing the main parts of the pipe joint of the present invention, and Figures 5 to 6 are cross-sectional views of the pipe joint of the present invention. Fig. 7 is a front view showing the main parts of the pipe joint, Fig. 7 is a joint sectional view showing the main parts of the pipe joint of the present invention, Fig. 8
The figure is a sectional view of a conventional pipe joint showing how it is used. Explanation of symbols: A: Tube body, B: Fitting tube, C: Pipe, 1: Expanding tube portion, 2: Step portion, 5: Flange edge, 7: Periphery, 8: Elastic ring body.

Claims (1)

[Scope of utility model registration request] An expandable cylindrical portion is formed at the end of the tube, and a stepped portion is formed at the base of the expandable cylindrical portion. A fitting cylinder having a certain inner diameter is fitted, and a flange extending inward is formed on the peripheral edge of the fitting cylinder on the tube end side of the tube body, and a step portion of the tube body, A pipe joint in which an elastic ring is fitted into a circumferential groove formed by the flange of an expanding cylinder and a fitting cylinder.