JP3453065B2 - Connection structure between manhole and ribbed tube - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for connecting a manhole and a ribbed pipe used for a sewer pipe or the like.

[0002]

2. Description of the Related Art As a method of connecting a manhole and a pipe, a water-proof flexible joint made of rubber or soft plastic has been proposed. Such a flexible joint can follow the displacement when the relative positional relationship between the manhole and the pipe is displaced due to the displacement of the ground or the like. The water-stop flexible joint has a tube-side cylinder part and a manhole-side cylinder part.The manhole-side cylinder part of the water-stop flexible joint is brought into contact with the inner peripheral surface of the drilled hole of the manhole. The cylindrical part is expanded and mechanically crimped and fixed to the drilled surface.

Japanese Unexamined Patent Publication No. 8-232280 discloses a method as shown in FIG.
A connection structure as shown in is proposed. This document proposes a manhole joint 32 for connecting the ribbed pipe 30 to a manhole 31. In this manhole joint 32, a ribbed pipe 30 is fitted into a short pipe 33, the short pipe is attached to a saddle 34, and the saddle is connected to a manhole side wall with a bonding material 35 such as mortar. By attaching a packing 36 larger than the outer circumference, the connection between the ribbed pipe and the short pipe is stopped.

[0004]

However, the joining by mortar is apt to cause cracks due to uneven settlement, earthquakes, etc., causing water leakage and unknown water, and packing is not considered to have sufficient waterproofness. .

On the other hand, the water-stop flexible joint is devised for connecting a circular pipe and a manhole. When the pipe to be connected is a deformed pipe such as a ribbed pipe, the water-stop flexible joint is used. Connection at the cylindrical part is difficult.

An object of the present invention is to connect a manhole and a ribbed pipe with a flexible joint so as to provide flexibility corresponding to a relative position variation between the manhole and the ribbed pipe, and to provide a reliable waterproofing property. Is to be obtained.

[0007]

According to the present invention, a manhole provided with a drilled hole and a rib provided on the outer peripheral surface are provided.
A connecting structure in which a pipe with ribs is connected by a flexible joint having elasticity, an end portion of the pipe is inserted into a drilled hole, and the flexible joint is attached to a manhole. The connecting part is provided with a fixing part, a tubular part into which the pipe is inserted, and a connecting part that connects the fixing part and the tubular part, and the connection structure is provided between the fixing part and the inner peripheral surface of the tubular part. The water material layer and the fastening member attached to the outer peripheral surface of the tubular portion are provided, and the tubular portion and the water blocking material layer are fastened by the fastening member, and the water blocking material layer is attached to the pipe. The tubular portion and the outer peripheral surface of the pipe are stopped by being pressed against the ribs on the outer peripheral surface.

The operation of the present invention will be described below with reference to the drawings. FIG. 1 shows a water-stop flexible joint 1 according to an example of the present invention.
It is a side view which shows the state which attached 6A to the manhole drilling part. FIG. 2 is a front view of the connection portion of FIG.
Is a sectional view. As shown in FIGS. 1, 2 and 3, ribs or annular projections 2 are regularly provided on the outer peripheral surface of the tube 1. The flexible joint 16A includes a cylindrical portion 6, a collar portion 5,
And a connecting portion 18 for connecting them.

At the water blocking portion A between the cylindrical portion 6 and the pipe 1, the pipe 1 is inserted into the cylindrical portion 6 having an inner diameter substantially equal to the outer diameter of the rib 2. A cylindrical water blocking material layer 8 is provided on the inside of the cylindrical portion 6, and on the outside of the cylindrical portion 6,
A fastening band 7 made of a rigid material is provided. The cylindrical portion 6 and the water blocking material layer 8 are fastened and fixed by the fastening band 7. The tip of the rib 2 bites into the water blocking material layer 8 to stop water. In the water blocking portion B between the manhole 3 and the collar portion 5, the collar portion 5 is adhered to the surface 3a around the manhole drilling hole 20 by the adhesive material 9 to form a water blocking portion.

There is a cylindrical waterproof material layer inside the cylindrical portion, and the cylindrical portion is tightened with a rigid fastening member provided on the outer side of the cylindrical portion to form the waterproof material layer on the rib of the pipe. The tip of
Water is stopped by pressing it toward the top and causing the tips of the ribs to bite into the water blocking material layer. Further, the water is also stopped between the collar portion and the manhole surface, and the water stopping portions A and B are integrally connected by the connecting portion 18, and the flexible joint 16A is provided.
Are configured. Therefore, attach a flexible joint,
After backfilling, even if the relative positional relationship between the ribbed tube and the manhole changes due to uneven settlement, earthquake, etc., it will exhibit sufficient flexibility and maintain water stoppage.

FIG. 4 is a sectional view showing a state in which a water-proof flexible joint 16B of another example of the present invention is attached to the manhole drilling hole 20. As shown in FIG. 4, the flexible joint 16
B includes a cylindrical portion 13, a fixed portion 10, and a connecting portion 18 that connects these. At the manhole-side water stop portion B, the cylindrical fixing portion 10 provided along the inner peripheral surface 3b of the manhole drilling hole 20 is fixed by being pressed or urged against the drilling surface 3b by the expansion band 11. There is. The water stop portion A on the side of the ribbed pipe is almost the same as that shown in FIG.

The fastening member is preferably a fastening band from the viewpoint of work, but may be a bolt or any other component capable of obtaining a sufficient tightening force. The flexible joint, the main body of the vertical handle can be formed from an elastic material, and synthetic rubber or natural rubber such as styrene-butadiene rubber, EPDM, chloroprene rubber, and soft pinyl chloride resin, thermoplastic elastomer, etc. You can choose from. The fastening member that requires rigidity can be formed from a synthetic material such as stainless steel, rust-proof plated steel, hard plastic, and fiber reinforced plastic, and these are desirable because they are resistant to corrosion. The material of the expansion band is preferably the same as the material of the fastening member.

The water blocking material layer is preferably made of a material selected from the group consisting of an elastic foam, a water-expandable elastomer and a butyl rubber-based sealing material. The elastic foam layer can be selected from rubber sponge, polyethylene foam, urethane foam and the like.

The water-swellable elastomer is formed by adding a water-swellable resin and other additives to natural rubber, synthetic rubber or soft plastic. The water-swelling component is also not particularly limited. In particular, rubber as the main material, which is rich in elasticity and resilience, is preferable, and "Neospan seal" (manufactured by Hayakawa Rubber Co., Ltd.) is particularly preferable.

The butyl rubber-based sealing material is a non-vulcanized butyl rubber-based waterproof material, and for example, "Span seal" (Hayakawa Rubber Co., Ltd.) is preferable.

[0016]

As described above, according to the present invention, it is possible to easily connect the ribbed pipe and the manhole, which conventionally required complicated processing, and, in the connected state, the manhole and the ribbed pipe are connected. Even if the relative position changes due to an earthquake or the like, the displacement can be followed and the water shutoff can be sufficiently maintained, which is useful for the management and maintenance of sewer facilities.

[Brief description of drawings]

FIG. 1 is a side view of a connection structure according to an embodiment of the present invention.

2 is a front view of the connection structure of FIG. 1. FIG.

3 is a cross-sectional view of the connection structure of FIG.

FIG. 4 is a side view of a connection structure according to another embodiment of the present invention.

5A and 5B are cross-sectional views of a conventional connection structure.

[Explanation of symbols]

1 Ribbed pipe (pipe) 2 ribs 3 manholes 5 Fixed part (collar part) 6,13 Cylindrical part 7 Fastening members 8 Water stop layer 9 Adhesive material 10 Cylindrical fixed part 11 extension band 16A, 16B flexible joint 18 Connection 20 drilling

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-232280 (JP, A) JP-A-8-93971 (JP, A) JP-A-9-32020 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) E02D 29/12 E03F 3/04 F16L 5/02

Claims (5)

(57) [Claims] 1. A connection structure in which a manhole having a drilled hole and a ribbed pipe having a rib provided on an outer peripheral surface thereof are connected by a flexible joint having elasticity. An end portion of the pipe is inserted into a hole, the flexible joint is fixed to the manhole, a tubular portion into which the pipe is inserted, and the fixed portion and the tubular portion. And a connecting portion for connecting between, and the connection structure, a water blocking material layer provided between the inner peripheral surface of the tubular portion and the outer peripheral surface of the pipe, and the tubular portion. A fastening member attached to the outer peripheral surface, the tubular portion and the water blocking material layer are fastened by the fastening member, the water blocking material layer of the outer peripheral surface of the pipe. By being pressed against the ribs, the tubular portion and the pipe And peripheral surface, characterized in that it is water stop, the connection structure between the manhole and the ribbed tube. 2. The width of the fastening member and the water blocking material layer
Spans at least two ribs and has at least 3
Characterized by two ribs being pressed to stop water,
A connection structure between a manhole according to claim 1 and a tube with ribs. 3. The fixing portion has a brim shape, and
The adhesive between the fixed part and the surface of the manhole
It is equipped with this adhesive and the fixing part and the man
The hole and the water are shut off.
Alternatively, the connection structure of the manhole according to 2 and the ribbed pipe. 4. The fixing portion has a tubular shape, and
The fixed part is inserted into the hole and the inner circumference of the fixed part
There is an energized expansion band on the
Due to the elastic restoring force from the tension band,
It is biased toward the inner peripheral surface of the hole, and
The contract is characterized by the fact that the manhole and
Connection structure between the manhole and ribbed pipe according to claim 1 or 2
Structure. 5. The water blocking material layer is made of elastic foam and water swellable.
A group consisting of elastomer and butyl rubber sealant
A material selected from the following:
With manhole and rib according to any one of claims 4
Connection structure with pipe.