JPH0742184A - Manhole joint - Google Patents

Abstract

PURPOSE:To simply and surely connect a synthetic resin pipe to the side wall of a manhole or the like. CONSTITUTION:The flange 32 of a flange joint 3 made of an elastic body such as rubber is connected to the side wall 1 of a manhole or the like with an adhesive 34. A sleeve 4 is inserted into the cylinder section 31 of the flange joint 3, the end section of a synthetic resin pipe 2 is inserted into the sleeve 4, and they are expandably connected via a rubber packing 42. The synthetic resin pipe 2 can be simply and surely connected to the side wall 1 of the manhole or the like, and the breakage of the synthetic resin pipe 2 can be surely prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole joint in which a synthetic resin pipe can be easily and surely connected to a side wall of a manhole or the like.

[0002]

2. Description of the Related Art As a manhole joint of this type, for example, Japanese Utility Model Publication No. 4-29190 proposes a cylindrical joint rubber applied to a joint portion between a concrete manhole and a concrete fume pipe.

[0003]

By the way, the connection between the manhole and the fume pipe using this joint rubber is as follows.
The flange of the joint rubber is connected to the side wall of the manhole via an adhesive, and the fume pipe is fitted and inserted into the cylindrical portion of the joint rubber, and the connection hole formed in the side wall of the manhole and the outer periphery of the end of the fume pipe. Mortar was filled and connected between the surface and the surface.

However, in this connection, since the manhole and the fume pipe are firmly fixed with the mortar, a thrust load in the pipe axis direction acts on the fume pipe after the pipe construction, earth pressure / wheel load, or ground. When a bending moment acts due to sinking or the like, there is a risk that the fume tube may be damaged at the connection portion.

The present invention has been made to solve the above problems, and a synthetic resin pipe can be easily and surely connected to the side wall of a manhole or the like, and the pipe can be reliably prevented from being damaged by absorbing a thrust load or a bending moment. This is to provide a manhole joint that can be made.

[0006]

SUMMARY OF THE INVENTION The present invention comprises an elastic body such as rubber provided with a flange on the outer periphery of one end of a cylindrical portion when connecting a synthetic resin pipe to a connection hole formed in a side wall of a manhole or the like. A flange joint and a sleeve in which a rubber packing is attached to an annular groove provided on the inner peripheral surface of the pipe end are prepared. Therefore, the flange of the flange joint is connected to the side wall via an adhesive, the sleeve is fitted into the cylindrical portion, the end of the synthetic resin pipe is fitted into the sleeve, and the sleeve is telescopically connected via the rubber packing. It is characterized by

[0007]

With the above construction, the connection angle of the synthetic resin pipe can be adjusted by the flange joint made of an elastic material such as rubber when the pipe is constructed. Further, after the piping is installed, external force such as thrust load or bending moment acting on the synthetic resin pipe can be absorbed by the rubber packing interposed between the sleeve and the synthetic resin pipe.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention,
In the figure, 1 is a side wall such as a manhole, 2 is a synthetic resin tube such as vinyl chloride resin, 3 is a flange joint, and 4 is a sleeve.

In the present invention, the flange joint 3 and the sleeve 4 are prepared when connecting the synthetic resin pipe 2 to the side wall 1 such as a manhole. The flange joint 3 is made of an elastic body such as rubber or soft plastic and has a cylindrical portion 3
A collar 32 is integrally connected to the outer circumference of one end of the collar 1. A semi-circular bent portion 33 is provided on the inner peripheral side of the flange 32, and the tilt angle of the cylindrical portion 31 can be adjusted by the bent portion 33. An adhesive 34 having adhesiveness such as butyl rubber is applied to the back surface of the collar 32, that is, the surface opposite to the side to which the cylindrical portion 31 is connected, and the adhesive 34 is covered with release paper not shown. .

On the other hand, the sleeve 4 is provided with an annular groove 41 on the inner peripheral surface of one end of a short pipe made of vinyl chloride resin or the like, and a rubber packing 42 is attached to the annular groove 41. The rubber packing 42 may be either a normal rubber packing having elasticity or a water-expandable rubber packing whose volume expands by absorbing water.

Next, a connection hole 11 having a diameter slightly larger than the outer diameter of the synthetic resin pipe 2 is formed in the side wall 1 such as a manhole. Further, the sleeve 4 is fitted into the cylindrical portion 31 of the flange joint 3, and one end of the sleeve 4 is inserted into the connection hole 11 from the outside of the manhole or the like. Therefore, the end portion of the synthetic resin pipe 2 is fitted into the sleeve 4, and positioning is performed while adjusting the connection angle of the synthetic resin pipe 2 with the bent portion 33 provided on the inner peripheral side of the flange 32 of the flange joint 3.

After temporarily laying the synthetic resin pipe 2 in this manner, the release paper covering the back surface of the flange 32 of the flange joint 3 is peeled off, and the back surface of the flange 32 is pressed against the side wall 1 of a manhole or the like to be bonded. The flange joint 3 is joined to the side wall 1 with the agent 34. Next, the band 5 is attached to the cylindrical portion 31 of the flange joint 3.
Is wound and fixed tightly, or an adhesive or the like is interposed between the inner peripheral surface of the cylindrical portion 31 and the outer peripheral surface of the synthetic resin pipe 2 to make a watertight connection. Furthermore, the connection hole 11 and the sleeve 4
The connection is completed by filling mortar, butyl rubber, etc. in the gap with the outer peripheral surface.

[0013]

As described above in detail, according to the present invention, the synthetic resin pipe is connected to the side wall of the manhole or the like by using the flange joint made of an elastic material such as rubber. Can be adjusted appropriately to make piping work extremely easy. Also, after the piping is installed, external forces such as thrust load and bending moment acting on the synthetic resin pipe can be absorbed by the rubber packing interposed between the sleeve and the synthetic resin pipe, so the synthetic resin pipe is damaged at the connection part. It can be surely prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of a flange joint showing an embodiment of the present invention.

[Explanation of symbols]

 1 Side wall of manhole 2 Synthetic resin pipe 3 Flange joint 4 Sleeve 11 Connection hole 31 Cylindrical part 32 Tsuba

Claims (1)

[Claims] 1. When connecting a synthetic resin pipe (2) to a connection hole (11) formed in a side wall (1) such as a manhole,
A flange joint (3) made of an elastic material such as rubber, in which a flange (32) is provided on the outer circumference of one end of the cylindrical portion (31), and a rubber packing (42) in the annular groove (41) provided on the inner peripheral surface of the pipe end. And a sleeve (4) fitted with the flange fitting (3) are connected to the side wall (1) via an adhesive (34) of the flange joint (3) and the sleeve (4) is attached to the cylindrical portion (31). And insert the synthetic resin tube (2) into the sleeve (4).
The manhole joint characterized in that the end portion of (1) is fitted and inserted so as to be able to extend and contract via the rubber packing (42).