JP2002294846A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint of excellent workability and excellent stability which does not impair a joint function to vibration of an earthquake or the like. SOLUTION: This pipe joint 1 comprises a cylindrical body 2 insert-fitted to a sewer pipe 8, and a flange 3 provided on the outer peripheral surface of the body 2. The pipe joint 1 further comprises a seal member 11 interposed between the cylindrical body 2 and the sewer pipe 8 and having water cut-off action and fixed space holding action between the outer peripheral surface of the sewer pipe 8 and the inner peripheral surface of the pipe joint 1, and a cap member 12. The seal member 11 is mounted into a circumferential groove 13 provided on the inner peripheral surface of the cylindrical body 2, and the cap member covers both inner and outer surfaces of an outside tubular end part of the cylindrical body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint having excellent workability and excellent stability without damaging the joint function against vibrations caused by an earthquake or the like.

[0002]

2. Description of the Related Art Conventionally, manhole fittings are generally
A sewer pipe is inserted and attached to the socket of the pipe fitting that is attached to the hole formed in the side wall of the manhole.

[0003]

However, if there is any deviation in the connection angle of the sewer pipe to the socket of the pipe joint, it is difficult to insert the sewer pipe, and the installation work is difficult. There are difficulties such as being damaged. In recent years, the connection structure of pipe joints has also been required to be earthquake-resistant. ing. An object of the present invention is to provide a pipe joint which is excellent in workability and has excellent stability without impairing the joint function against vibrations such as earthquakes.

[0004]

A pipe joint according to the present invention comprises a cylindrical body into which a sewer pipe is inserted, a flange provided on an outer peripheral surface of the main body, and a cylindrical body interposed between the cylindrical body and the sewer pipe. And a seal member and a cap member having a water stopping action and a constant spacing action between the outer peripheral surface of the sewer pipe and the inner peripheral surface of the pipe joint, and the seal member is provided on the inner peripheral surface of the cylindrical main body. The cap member is fitted in the provided circumferential groove, and the cap member is covered on both the inner and outer surfaces of the outer tubular end of the cylindrical body.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pipe joint of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view showing an example of the pipe joint of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a schematic view showing a use state of the pipe joint of the present invention. FIG. FIG. 4 is a side view showing another example of the pipe joint of the present invention.

As shown in FIGS. 2 and 3, a pipe joint 1 according to the present invention comprises a cylindrical main body 2 and a flange 3, and a forward end 4 of the cylindrical main body 2 is opened to a side wall 5 of a manhole. The cylindrical body 2 is fitted and fixed in the hole 6, and the sewage pipe 8 is inserted and attached from the opening of the rear end 7 of the cylindrical body 2. As shown in FIG. 3, when the front end portion 4 of the cylindrical body 2 of the pipe joint 1 is fitted to the mounting hole 6 of the manhole by using the adhesive 10, the flange 3 is also provided with the adhesive 10. Along the wall surface 9 of the manhole. The flange 3 may be manufactured as a single piece, and may be provided by being adhered and integrated at a desired position on the outer peripheral surface of the cylindrical main body 2 according to the thickness of the side wall of the manhole at the construction site. It may be provided so as to be integrally formed by molding or the like.

As shown in FIG. 3, the pipe joint of the present invention has a seal member 11 and a cap member 12 interposed between a cylindrical main body 2 and a sewer pipe 8 inserted into the cylindrical main body 2 so as to form a cylindrical main body. A constant interval is maintained between the inner peripheral surface of the second and the outer peripheral surface of the sewer pipe 8. The seal member 11 is mounted in a circumferential groove 13 provided on the inner peripheral surface of the cylindrical main body 2, and is inserted into and attached to the cylindrical main body 2 while maintaining a constant interval between the cylindrical main body 2 and the drain pipe 8. Water tightness (water tightness) with the drain pipe 8
Is to be held.

[0008] The seal member used in the pipe joint of the present invention includes:
It is necessary to maintain the water stoppage while maintaining a certain interval between the cylindrical main body 2 and the sewer pipe 8. For this reason, a conventionally used cross section having a circular or elliptical cross section and a wide cross section may be used. However, as shown in FIGS. It is preferable to mount a tapered shape that gradually becomes thinner toward the tip and that protrudes obliquely in a funnel-shaped cross section in the orbiting groove 13 so as to expand toward the manhole. By employing such a sealing member 11, the elasticity of the protruding portion is greatly improved, so that the sewer pipe can be smoothly inserted into the cylindrical body and the resistance to the sewer pipe coming off is reduced. And the water stoppage is enhanced.

The cap member 12, together with the seal member 11, maintains a certain distance between the cylindrical body 2 and the drain pipe 8, and prevents the entry of earth and sand from the outside at this distance. Therefore, the cap member 12 is attached so as to cover both the inner and outer surfaces of the outer tubular end of the cylindrical main body 2 in order to enhance the sealing property within the above-mentioned predetermined interval. Although not shown, the inner surface of the outer tubular end of the cylindrical body 2 of the cap member 12 gradually becomes thinner toward the distal end, similarly to the above-described protruding portion of the seal member 11. A shape that projects obliquely in a funnel shape is preferred.

The seal member 11 and the cap member 12 maintain a certain distance between the cylindrical main body 2 and the sewer pipe 8, thereby providing a margin for the connection angle when the sewer pipe is inserted into the pipe joint. Further, after the sewer pipe is attached, the sewer pipe can not only absorb the vibration of the sewer pipe due to an earthquake or the like, but also can cope with movement from all angles applied to the sewer pipe.

In the pipe joint according to the present invention, the constant distance between the inner peripheral surface of the cylindrical main body 2 and the outer peripheral surface of the sewage pipe 8 is determined by setting the inner diameter of the cylindrical main body 2 to the outside of the sewage pipe 8. 103 of diameter
% To 110%, it is preferable to have a size that occurs when formed. Specifically, it is preferable to maintain an interval of 5 mm to 16 mm, although it depends on the size of the sewer pipe. FIG. 3 shows an example in which sewage pipes 8, 14, and 15 having different connection angles are inserted into the pipe joint of the present invention, or the sewage pipe 8 inserted at a regular angle is shaken by an earthquake or the like. And 1
4 and 15 show cases where the connection angle has changed. As described above, according to the pipe joint of the present invention, the connection angle of the sewer pipe that can be inserted into the cylindrical main body 2 has a margin, and the movement of the sewer pipe due to an earthquake or the like can be absorbed.

In the pipe joint of the present invention, as shown in FIG. 4, from the outer peripheral surface of the forward end portion 4 of the cylindrical main body 2 to be fitted in the mounting hole formed in the side wall of the manhole, to one side surface of the flange. When the sanding process 16 is performed, a stronger watertight joint with a concrete manhole can be obtained.

The cylindrical body and the flange of the pipe joint of the present invention are made of a synthetic resin such as hard polyvinyl chloride resin, polyethylene, polypropylene, ABS, and the like, and NBR, SBR, EPDM are used for the sealing member and the cap member. ,
Rubber-based materials such as silicone rubber and elastic synthetic resins such as soft polyvinyl chloride resin and EVA are used.

In the pipe joint of the present invention, the front end of the cylindrical main body 2 is joined or integrated into an attachment hole formed in the side wall of the manhole by using an adhesive material 10 such as mortar or epoxy resin. One side of the flange is joined and integrated along the wall surface 9 of the manhole, and the connection of the sewer pipe to the manhole can be performed simply by inserting the sewer pipe 8 into the opening of the rear end 7 of the cylindrical main body 2. You.

[0015]

According to the pipe joint of the present invention, since the connection angle of the sewer pipe is flexible, the workability is excellent, and the impact applied to the connecting part between the sewer pipe and the manhole due to vibrations such as earthquakes, Since vibration can be absorbed, a joint function with excellent durability can be maintained.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a pipe joint of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a schematic sectional view showing a use state of the pipe joint of the present invention.

FIG. 4 is a side view showing another example of the pipe joint of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pipe joint 2 tubular body of pipe joint 3 flange 4 forward part of cylindrical body 5 side wall of manhole 6 mounting hole of manhole 7 rear end of cylindrical body 8, 14, 15 sewage pipe 9 wall surface of manhole 10 adhesive DESCRIPTION OF SYMBOLS 11 Seal member 12 Cap member 13 Orbiting groove 16 Processing with sand

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F16L 21/02 F16L 41/08 41/08 5/02 Z F term (Reference) 2D063 DA27 DA28 3H014 AA02 3H015 BB01 BC01 3H019 DA01 DA03 DA10 DA14

Claims (1)

[Claims] 1. A pipe joint for connecting a sewer pipe to a side wall of a manhole, comprising: a cylindrical main body into which the sewer pipe is inserted; a flange provided on an outer peripheral surface of the main body; A seal member and a cap member interposed between the seal member and having a water stopping action and a constant spacing action between the outer peripheral surface of the sewer pipe and the inner peripheral surface of the pipe joint, wherein the seal member has a cylindrical main body. A pipe joint which is mounted in a circumferential groove provided on an inner peripheral surface, wherein the cap member is covered over both the inner and outer surfaces of an outer tubular end of a cylindrical body.