JPH06193085A - Manhole skeleton and mounting structure of installation tube - Google Patents

Abstract

PURPOSE:To eliminate the need of a special tool, and ensure an easy work for mounting an installation tube to a manhole skeleton. CONSTITUTION:The end of a tube 3a having an inner diameter larger than the outer diameter of an installation tube 2 is provided with the first socket 3 with a flange 3b fixed, a manhole skeleton 1 having a hole 1a with an inner diameter larger than the outer diameter of the tube 3a, and the second socket 4 with a flange 4b fixed to the end of a tube 4a having an inner diameter larger than the outer diameter of the installation tube 2. The tube 3a is inserted in the hole 1a and a sealing layer 6 is formed at a gap 5 between the tube 3a and the hole 1a. Furthermore, the tube 4a is inserted in the tube 2 and a sealing layer 9 is formed at a gap 8 between the tubes 4a and 2. In addition, the flanges 3b and 4b are jointed to each other with a packing 10 laid in between.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole skeleton constructed so that it can be easily constructed on site without connecting a special tool when connecting a pipe laid underground and a manhole skeleton. The present invention relates to a mounting structure for a mounting pipe.

[0002]

2. Description of the Related Art When attaching a mounting pipe such as an inflow pipe or an outflow pipe to a manhole body, a hole for the mounting pipe is formed in the manhole body, and the mounting pipe is inserted into this hole to insert mortar into the space between them. It is filled and fixed.

According to the above-mentioned mounting method, the amount of work on the site increases, and after the mounting pipe is fixed, when an unexpected force acts on the mounting pipe or the manhole structure due to an earthquake or ground subsidence, etc., the mounting pipe or the manhole structure May be damaged.

In order to solve the above problem, the applicant of the present application has proposed the technique disclosed in Japanese Utility Model Publication No. 4-32543.
According to this technique, since the mounting pipe and the manhole body are connected via the flexible water blocking band, even if some force acts on the mounting pipe or the manhole body, this force is applied by the water blocking ring. It can be absorbed to prevent damage to the mounting pipe or manhole body.

[0005]

Although the above technique is sufficiently practical, it can be installed more easily from the construction site and the construction error at the construction site can be absorbed. It is required to develop a mounting structure for the manhole skeleton and the mounting tube that can do so.

The present invention was developed in response to the above-mentioned requirements, and it is an object of the present invention to provide a mounting structure for a manhole body and a mounting pipe which does not require a special tool and is easy to construct. is there.

[0007]

Means for Solving the Problems In order to solve the above problems, a mounting structure for a manhole body and a mounting pipe according to the present invention comprises:
A manhole body having a hole larger than the preset outer diameter of the mounting pipe, and one end of the pipe having an outer diameter smaller than the diameter of the hole and an inner diameter larger than the outer diameter of the mounting pipe. A first socket formed by fixing a flange to the second socket, and a second socket formed by fixing a flange to be fastened to the flange of the first socket at one end of a pipe having an inner diameter larger than the outer diameter of the mounting pipe. A socket for inserting the pipe forming the first socket into a hole formed in the manhole body, forming a seal layer in a gap between the two, and inserting the mounting pipe into the pipe forming the second socket, and The seal layer is formed in the gap of the first socket, and the flange of the second socket is fastened to the flange of the first socket.

In the above structure, the flange of the second socket has a diameter larger than that of the flange of the first socket, and the bolt hole of the flange of the second socket has a diameter larger than that of the flange of the first socket. Is preferably formed.

[0009]

According to the mounting structure of the manhole skeleton and the mounting pipe, the manhole skeleton can be easily installed without a special tool when mounting the mounting pipe on the manhole skeleton.

That is, in constructing a manhole, a first socket and a second socket having an inner diameter larger than a preset outer diameter of the mounting pipe are prepared, and at the same time, the first socket
Prepare a manhole skeleton having a hole larger than the outer diameter of the socket, assemble this manhole skeleton at a predetermined place, and then attach the mounting tube to the skeleton, when attaching the mounting tube to the socket of the second socket. To form a seal layer in the gap formed between the outer circumference of the mounting pipe and the inner circumference of the pipe, and insert the pipe of the first socket into the hole of the manhole body to insert the hole and the outer circumference of the pipe. Form a seal layer in the gap formed between,
Further, the attachment pipe can be attached to the manhole body by fastening the flange of the first socket and the flange of the second socket.

When the manhole body and the mounting pipe are mounted as described above, the tool required is only a spanner used for fastening the flange of the first socket and the flange of the second socket. There is no need for a concrete drill or the like for fixing the anchor bolts to the body.

Further, the work of inserting the first socket into the manhole skeleton, the work of inserting the second socket into the mounting pipe, and the like can be easily performed, and therefore, the on-site construction can be easily performed.

The flange of the second socket has a diameter larger than that of the flange of the first socket, and the bolt hole formed in the flange of the second socket is larger than the bolt hole formed in the flange of the first socket. Even if the axial center of the mounting pipe does not coincide with the axial center of the hole of the manhole body due to the construction error of the laid pipeline and / or the construction error of the manhole, this error can be absorbed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the above mounting structure will be described below with reference to the drawings. FIG. 1 is a sectional view of an essential part for explaining a mounting structure of a mounting pipe to a manhole body, FIG. 2 is a diagram for explaining a structure of a first socket, (a) is a front view, (b) is a side view, [FIG. 3] is a diagram for explaining the configuration of the second socket, (a) is a front view, and (b) is a side view. The mounting structure shown in FIG. 1 can easily perform on-site construction when mounting the mounting pipe to the manhole body, and can absorb the construction error of the manhole body or the construction error of the laid pipeline. It was possible.

As shown in FIG. 1, the manhole body 1 and the mounting pipe 2 are mounted via a first socket 3 and a second socket 4. The manhole body 1 is formed with a hole 1a through which the pipe 3a of the first socket 3 having an inner diameter larger than the preset outer diameter of the mounting pipe 2 is inserted. The hole 1a is formed in advance at the factory stage where the manhole body 1 is manufactured.

Therefore, the manhole skeleton 1 having the required number of holes 1a already formed therein and other parts are carried into the manhole construction site, and a manhole (not shown) is constructed according to a predetermined procedure. Such a manhole is called an assembly manhole and is already known.

The pipe 3a of the first socket 3 is inserted into the hole 1a formed in the manhole body 1. As shown in FIG. 2, the first socket 3 is configured by fixing a flange 3b to one end of a pipe 3a by welding or the like.

When the pipe 3a of the first socket 3 is inserted into the hole 1a of the manhole body 1, a gap 5 having a predetermined size is formed between the pipe 3a and the hole 1a, and the sealing layer 6 is formed in the gap 5. It has an outer diameter that can be formed. Again tube 3
The inner diameter of a is sufficiently larger than the outer diameter of the mounting tube 2.

The length of the tube 3a is not particularly limited. However, when the first socket 3 is attached to the manhole body 1, it may have a length that can form a space between the flange 3b and the outer peripheral surface of the manhole body 1 such that a bolt can be fastened with a spanner. preferable. In this embodiment, the length of the pipe 3a is set so that a space of about 50 mm can be formed between the flange 3b and the outer peripheral surface of the manhole body 1.

A locking portion 3d for locking the sealing material is formed at a position corresponding to a dimension of about 1/2 of the thickness of the manhole body 1 from the free end 3c side of the tube 3a. This locking portion 3d
Is for locking the ring-shaped seal material when it is attached to the pipe 3a,
It is possible to prevent the sealing material from curling or shifting when inserting the tube 3a into the hole 1a. When the wall thickness of the pipe 3a is large, the locking portion 3d can be formed as a ring-shaped groove on the outer periphery of the pipe 3a to serve as the locking portion 3d.
When the wall thickness of a is thin, it is possible to form the locking portion 3d by molding two ring-shaped ribs on the tube wall of the tube 3a.

The flange 3b is fastened to the flange 4b of the second socket 4 via bolts 7a and nuts 7b. Therefore, a required number of bolt holes 3e having a diameter corresponding to the thickness of the bolt 7a are formed at predetermined positions of the flange 3b.

The second socket 4 has a function of attaching the attachment tube 2 to the manhole body 1 via the first socket 3. As shown in FIG. 3, the second socket 4 is configured by fixing a flange 4b to one end of a pipe 4a by welding or the like.

The pipe 4a of the second socket 4 forms a gap 8 between the pipe 4a and the outer peripheral surface of the attachment pipe 2 when the attachment pipe 2 is inserted, and a seal layer 9 can be formed in the gap 8. It has a large inner diameter. The length of the pipe 4a is not particularly limited as long as the sealing layer 9 formed in the gap 8 with the outer peripheral surface of the mounting pipe 2 can sufficiently oppose the osmotic pressure of groundwater.

The free end 4c of the tube 4a is provided with a flange-shaped shield 4d that defines the end of the sealing layer 9.
The shielding portion 4d has an inner diameter larger than the outer diameter of the mounting tube 2 and has a function of preventing the sealing material forming the sealing layer 9 from protruding outside the gap 8.

The flange 4b of the second socket 4 is formed to have a diameter larger than that of the flange 3b of the first socket 3, and the bolt holes 4e are formed at positions corresponding to the bolt holes 3e formed in the flange 3b. Has been done. The bolt hole 4e of the flange 4b is formed as a so-called stupid hole, and has a diameter sufficiently larger than the diameter of the bolt hole 3e of the flange 3b.

As described above, the diameter of the flange 4b and the diameter of the bolt hole 4e are made sufficiently larger than the diameter of the flange 3b and the diameter of the bolt hole 3e, so that a construction error or a pipe line generated when the manhole is constructed is eliminated. It is possible to absorb construction errors that occur during installation.

A gap 5 formed by the hole 1a of the manhole body 1 and the tube 3a of the first socket 3 and the second socket 4
The sealing material forming the sealing layers 6 and 9 formed in the gap 8 formed by the pipe 4a and the mounting pipe 2 is not particularly limited, and has appropriate elasticity or flexibility and watertightness. Anything can be used. As such a sealing material, it is possible to use, for example, a rubber packing, a sealing material for construction, a rubber for water supply, or the like.
The method for forming the seal layers 6 and 9 is not particularly limited.

In this embodiment, water-expandable rubber that expands by the action of water is used as the sealing material. Then, for example, the pipe 3a of the first socket 3 is inserted into the hole 1a of the manhole structure 1 to form a gap 5, and then the gap 5 is filled with swelling rubber and swelled by the action of groundwater. It is possible to configure the seal layer 6 made of rubber.

Further, in this embodiment, a ring-shaped swelling rubber is formed in advance according to the diameter of the groove 3d formed in the first socket 3 or the outer diameter of the mounting pipe 2, and the mounting pipe 2 is attached to the manhole body 1 At the time of attaching the ring, a ring of swelling rubber is attached to the attachment tube 2 and the first socket 3, and can be inserted into the corresponding holes.

The expansion ratio of the swollen rubber is set to have a value sufficient to fill the volume of each of the gaps 5 and 8. Therefore, the gaps 5 and 8 are filled with the swelling rubber and are in a watertight state. Further, since the swelling rubber has an appropriate elasticity, when an unexpected force acts on the mounting pipe 2 or the manhole body 1 due to an earthquake or ground subsidence, the force is absorbed by the sealing layers 6 and 9 made of the swelling rubber. Is possible.

Next, the procedure for attaching the attachment pipe 2 to the manhole body 1 by the first socket 3 and the second socket 4 will be described.

First, the tube 4a of the second socket 4 is inserted from the tube end side of the mounting tube 2 and the swelling rubber ring is mounted on the mounting tube 2. Next, after mounting a swelling rubber ring in the groove 3d formed in the tube 3a of the second socket 3, the tube 3a is inserted into the hole 1a of the manhole frame 1. These operations can be easily performed without imposing a special burden on the worker.

Next, a packing 10 formed by molding a swelling rubber into a disk shape is attached to the flange 3a of the first socket 3, and the flange 4b of the second socket 4 is abutted to make the bolt holes 3e and 4e face each other. These bolt holes 3e, 4
The bolt 8a is inserted through e and fastened with the nut 8b. At this time, it is necessary to use a washer 7c larger than the bolt hole 4e.

When carrying out the above work, a construction error occurs in the pipeline laid in the ground, or a construction error occurs in the manhole, so that the axial center of the mounting pipe 2 and the axial center of the hole 1a of the manhole body 1 coincide with each other. Even if it does not, since the bolt hole 4e formed in the flange 4b is formed as a stupid hole and the diameter of the flange 4b is formed sufficiently larger than the flange 3b, this error is caused by the flange 4b. Can be absorbed by.

When the mounting pipe 2 is attached to the manhole body 1 via the first socket 3 and the second socket 4, the pipe end of the mounting pipe 2 protruding inside the pipe 3a of the first socket 3 provides a space between the two. A space 11 is formed. By filling the space 11 with the mortar 12, the mounting pipe 2 and the first socket 3 can be integrated.

When the mounting pipe 2 is attached to the manhole body 1 as described above and then the surrounding area is backfilled, the moisture and groundwater contained in the earth and sand act on the swelling rubber, and the holes 1a of the manhole body 1 and the first The swollen rubber arranged in the gap 5 formed between the pipes 3a of the socket 3 and the swollen rubber arranged in the gap 8 formed between the mounting pipe 2 and the pipe 4a of the second socket 4 respectively expand and expand. To fill the gaps 5 and 8 to form sealing layers 6 and 9. Therefore, the sealing layers 6 and 9 can prevent groundwater from penetrating into the manhole, and can absorb an unexpected force acting on the mounting pipe 2 or the manhole body 1.

As described above, the mounting tube 2 is attached to the manhole body 1
When installing on, the only tool required is a spanner,
No special tools such as concrete drills are required.
Further, both the work of inserting the first socket 3 into the hole 1a of the manhole body 1 and the work of inserting the second socket 4 into the mounting pipe 2 are simple work, and the entire construction work can be easily carried out. Is.

[0038]

As described above in detail, in the mounting structure of the manhole body and the mounting pipe according to the present invention, the holes for mounting the mounting pipe and the first and second sockets are manufactured in advance at the factory stage. At the construction site, the first socket is inserted into the hole of the manhole skeleton and the sealing material is attached, and the second socket is inserted into the mounting pipe and the sealing material is attached. By performing the work of fastening the flange of, the mounting pipe can be attached to the manhole body. This work does not require a special tool, and the installation pipe can be attached to the manhole body by a simple operation of fastening the bolts and nuts, which facilitates on-site construction.

Even when the axial center of the mounting pipe does not coincide with the axial center of the hole formed in the manhole body due to a construction error, this error is fastened to the flange of the second socket to the flange of the first socket. It can be absorbed.

Further, since the sealing layer formed in the gap formed by the hole of the manhole body and the pipe of the first socket and the gap formed by the pipe of the second socket and the mounting pipe has appropriate elasticity. When an unexpected force is applied to the mounting pipe or the manhole body, the force can be absorbed.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part for explaining a mounting structure of a mounting tube with respect to a manhole body.

FIG. 2 is a diagram illustrating a configuration of a first socket (a).
Is a front view and (b) is a side view.

FIG. 3 is a diagram illustrating a configuration of a second socket (a).
Is a front view and (b) is a side view.

[Explanation of symbols]

 1 Manhole body 1a Hole 2 Mounting tube 3 First socket 4 Second socket 3a, 4a Tube 3b, 4b Flange 3d Locking part 4d Shielding part 3e, 4e Bolt hole 5,8 Gap 6,9 Seal layer 7a Bolt 7b Nut 10 Packing 11 Space 12 Mortar

Front Page Continuation (72) Inventor Ichiro Butoya 1-22-2 Nishishinjuku, Shinjuku-ku, Tokyo Haneda Hume Tube Co., Ltd. (72) Inventor Yu Murase 1-2-22 Nishishinjuku, Shinjuku-ku, Tokyo Haneda Hume Tube Co., Ltd. (72) Inventor Hoshikawa ▲ Today ▼ Fu Heijima 6-1, 1-1, Ota-ku, Tokyo Stock company Nobuaki Sangyo (72) Inventor Takashi Matsumoto 3-32-7-Aoi, Adachi-ku, Tokyo 303

Claims (2)

[Claims] 1. A manhole body having a hole larger than a preset outer diameter of a mounting pipe, and a pipe having an outer diameter smaller than the diameter of the hole and an inner diameter larger than the outer diameter of the mounting pipe. 1st which constituted by fixing a flange to one end of
A socket and a second socket formed by fixing a flange to be fastened to the flange of the first socket to one end of a pipe having an inner diameter larger than the outer diameter of the mounting pipe,
The pipe forming the first socket is inserted into the hole formed in the manhole body, a seal layer is formed in the gap between the two, the mounting pipe is inserted in the pipe forming the second socket, and the seal layer is formed in the gap between the two. A mounting structure for a manhole skeleton and a mounting pipe, characterized in that the flange of the second socket is fastened to the flange of the first socket. 2. The flange of the second socket has a diameter larger than that of the flange of the first socket, and
2. The mounting structure for a manhole body and a mounting pipe according to claim 1, wherein the bolt hole of the flange of the socket is formed with a diameter larger than that of the bolt hole of the flange of the first socket.