JPH08338064A - Manhole joint - Google Patents

Abstract

PURPOSE: To make it possible to easily and surely connect a drain pipe to a side wall of manhole, etc. CONSTITUTION: One end of a short pipe 2 is inserted into a through hole 11 bored in a side wall of manhole, etc., to connect. Then, a drain pipe 3 is inserted in the short pipe 2, a rubber sleeve 4 is fitted over and fixed to the circumference of the other end of the short pipe projected from the side wall of the manhole, etc., and the circumference of the drain pipe 3. By the constitution, the drain pipe can be easily and surely connected to the side wall of the manhole, etc., and the damage in the drain pipe can be 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 capable of easily and surely connecting a drain pipe to a side wall of a manhole or the like and absorbing expansion and contraction movement of the drain pipe.

[0002]

2. Description of the Related Art Conventionally, when a drainage pipe is connected to a side wall of a manhole or the like, one end of a pipe joint 6 is inserted into a through hole 11 formed in the side wall 1 of the manhole or the like as shown in the sectional view of FIG. By inserting and connecting, the end of the drainage pipe 3 was inserted into the receiving port 61 provided at the other end of the pipe joint 6 and connected via the rubber ring 7 attached to the inner peripheral surface of the receiving port 61.

[0003]

However, in the case of the pipe connection using the pipe joint 6, the method for exchanging the drainage pipe 3 may not be successfully performed. That is, when inserting the end portion of the drainage pipe 3 that has been sequentially connected to the vicinity of the side wall 1 such as a manhole into the receiving opening 61 of the pipe joint 6 fixed to the side wall 1, the drainage pipe 3 is retracted and then the end portion is removed. Since it has to be inserted into the socket 61, this exchange connection may not be possible or the work may be time-consuming depending on the construction situation at the site.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a drain pipe can be easily and surely connected to a side wall of a manhole or the like, and the thrust load acting on the drain pipe can be absorbed and alleviated to damage the drain pipe. It is intended to provide a manhole joint capable of preventing the above.

[0005]

According to the present invention, one end of a short pipe is inserted and connected into a through hole formed in a side wall of a manhole or the like,
A drainage pipe is inserted into the short pipe, and a rubber sleeve is externally fixed to the outer periphery of the drain pipe and the outer periphery of the other end of the short pipe protruding from the side wall of the manhole or the like, and the rubber sleeve is interposed. The short pipe and the drainage pipe are elastically connected.

[0006]

With the above structure, the drainage pipe can be exchanged even after the short pipe is connected to the side wall of the manhole or the like when the pipe is constructed. That is, one end of the drainage pipe inserted into the short pipe can be projected into the manhole and then pulled back, and the other end can be inserted and connected to the receptacle of the drainage pipe that has been sequentially connected. After connection, the short pipe and drain pipe are connected via a rubber sleeve, so external forces such as thrust load acting on the drain pipe are absorbed and alleviated by the rubber sleeve, so the drain pipe is not damaged. .

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a connection state of a drainage pipe by a manhole joint of the present invention, in which 1 is a side wall of a manhole or the like made of a polyolefin resin, 2 is a short pipe made of a polyolefin resin, and 3 is vinyl chloride. Drain pipes 4 made of resin or the like are rubber sleeves.

In the rubber sleeve 4, a tubular body 41 having an inner diameter substantially equal to the outer diameter of the short pipe 2 and a tubular body 42 having an inner diameter substantially equal to the outer diameter of the drainage pipe 3 are arcuate expansion / contraction portions 43.
It is configured to be integrally connected via. Also,
An adhesive 35 such as butyl rubber is uniformly applied to the inner peripheral surfaces of the cylindrical bodies 41 and 42, and the surfaces thereof are covered with a release paper.

In the present invention, when the drain pipe 3 is connected to the side wall 1 of a manhole or the like by using the rubber sleeve 4, first, the side wall 1 of the manhole or the like is provided with a through hole 11 having an outer diameter substantially equal to the outer diameter of the short pipe 2. Then, one end of the short tube 2 is inserted into the through hole 11 and fusion or adhesive bonding is performed. This connection work may be performed at the construction site of the pipe, or may be connected in advance at a manufacturing factory such as a manhole.

Next, the release paper covering the inner peripheral surface of the tubular body 41 of the rubber sleeve 4 is peeled off and externally inserted into the other end of the short tube 2 protruding from the side wall 1 such as a manhole, Tighten the outer peripheral surface with the band 5 to fix it. Therefore, the end of the drainage pipe 3 is inserted into the short pipe 2, the tip of the drainage pipe 3 is projected to the inside of a manhole or the like, and then pulled back, and the other end is inserted and connected to the receptacle of the drainage pipe that has been sequentially connected. After making the exchange connection in this manner, the tubular body 42 of the rubber sleeve 4 is turned over, the release paper covering the inner peripheral surface thereof is peeled off, and then the outer peripheral surface thereof is clamped and fixed by the band 5.

In this way, the short pipe 2 and the drain pipe 3 are connected via the rubber sleeve 4 so as to be able to expand and contract and move. Therefore, even if the drainage pipe 3 expands or contracts after the pipe construction or moves by receiving a thrust load in the pipe axis direction, these movements and external forces are absorbed and relaxed by the elastic portion 43 of the elastic rubber sleeve. Therefore, the drainage pipe will not be damaged at the connection.

Although the rubber sleeve 4 shown in FIG. 1 has the elastic portion 43, the present invention is not limited to this. Depending on the case, even if the expansion / contraction part 43 is omitted and the structure is made up of the cylindrical body 41 and the cylindrical body 42, the expansion / contraction movement of the drainage pipe can be absorbed or alleviated to some extent.

[0013]

As described above in detail, when the manhole joint of the present invention is used, the drainage pipe can be connected to the side wall of the manhole or the like by the exchange method, so that the piping construction on site can be performed very easily. Further, after the pipe construction, the external force such as the thrust load acting on the drain pipe can be absorbed and alleviated by the rubber sleeve, so that the drain pipe can be prevented from being damaged.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a connected state of a drainage pipe by a manhole joint of the present invention.

FIG. 2 is a cross-sectional view showing a connected state of a drainage pipe by a conventional joint.

[Explanation of symbols]

 1 Side wall such as manhole 2 Short pipe 3 Drain pipe 4 Rubber sleeve 11 Connection hole

Claims (1)

[Claims] 1. A short pipe (2) is inserted and connected to a through hole (11) formed in a side wall (1) of a manhole or the like, and a drain pipe (3) is inserted into the short pipe (2). Then, a rubber sleeve (3) is externally fixed on the outer circumference of the drain pipe (3) and the outer circumference of the other end of the short pipe (2) protruding from the side wall (1) of the manhole or the like. Short tube (2) through sleeve (3)
A manhole joint characterized in that the drainage pipe (3) and the drainage pipe (3) are elastically connected.