JPH0738244U - Water stop material for manhole fittings - Google Patents

Abstract

(57) [Abstract] [Purpose] Leakage and water infiltration do not occur from the connection part with the rib pipe connected to the manhole, which prevents them and facilitates mounting on the rib pipe. [Structure] An annular water blocking material 1 in which a concave groove 3 made of a water-expandable material 4 is formed on an inner peripheral surface side, and a manhole 12
Of the rib 11 formed at the connection end 10a of the rib pipe 10 inserted and connected to the connection port 12a of
Are fitted and mounted along the ribs 11.
In addition, in the water stop material 1, a pair of ridges 5, 5 are formed in the circumferential direction on the outer peripheral surface side, and a pair of ridges 5, 5 are formed.
A band-shaped portion 6 made of a water-swellable material may be formed between the two.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water blocking material used at a connecting portion between a rib pipe and a manhole forming a pipeline for drainage and the like.

[0002]

[Prior art]

 In order to connect a concrete manhole buried in the ground and a rib pipe made of hard vinyl chloride resin with a rib protruding in a ring shape at a predetermined interval on the outer circumference, it was drilled on the side wall surface of the manhole. It is connected by inserting the connecting end of the rib pipe into the connecting port.In the past, sand was previously adhered to the outer peripheral surface of the connecting end of this rib pipe, and this connecting end was inserted into the connecting port of the manhole. After that, a filling material such as mortar was filled in the gap between the outer periphery of these connection ends and the connection port to connect and fix each other.

Further, in order to secure the waterproof property at this connection portion, an O-ring shaped waterproof material is mounted between the ribs at the connection end of the rib pipe.

[0004]

[Problems to be solved by the device]

 However, in the above-described connection method, the filler filled in the gap between the outer periphery of the connection end of the rib pipe and the connection port of the manhole has ribs formed in the direction orthogonal to the filling direction of the filler. Therefore, there is a drawback that the space between the ribs is not sufficiently filled. As a result, there is a problem that the rib pipe is not sufficiently fixed to the manhole connection port, resulting in edge breakage at the interface between the filler and the rib pipe.

Further, since the conventional connection between the manhole and the rib pipe is made of materials different from each other, for example, a vehicle or the like passes over a lid exposed on the ground surface of the manhole. However, when vibration or load is transmitted to the manhole, there is a problem that edges are cut off at the interface between the filler and the rib pipe.

Further, the manhole may sink to the rib pipe due to the weight of the manhole, and similarly, the problem that the interface of the filler, which is the connecting portion, with the rib pipe may be cut off may occur.

Then, due to the gaps caused by the edges, problems such as sewage leaking out from inside the manhole and groundwater entering from outside the manhole occur.

Further, in order to secure the water blocking property, a water blocking material may be provided between the ribs at the connection end portion of the rib pipe, but the above-mentioned edge cutting at the interface between the filling material and the rib pipe may occur. Since the outer peripheral portions between the ribs are communicated with each other, there is a drawback that sufficient water stop cannot be maintained.

Therefore, in order to solve the above-mentioned problems, the present invention prevents the leakage of water and the infiltration of water from the connecting portion of the manhole buried in the ground and the rib pipe connected to this manhole, and prevents them. At the same time, it is an object of the present invention to provide a water blocking material for a manhole joint that can be easily mounted on a rib pipe.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the water blocking material for a manhole joint according to the present invention is an annular water blocking material 1 in which a concave groove 3 made of a water-expandable material 4 is formed on an inner peripheral surface side 2a. The groove 3 is fitted to the tip edge of the rib 11 formed at the connection end 10a of the rib pipe 10 inserted into and connected to the connection port 12a of the hole 12, and is mounted along the rib 11. It is characterized by that.

Further, in the water blocking material 1, a pair of protrusions 5 and 5 are formed in the circumferential direction on the outer peripheral surface side 2b, and a water-swellable material is used between the pair of protrusions 5 and 5. The strip-shaped portion 6 may be formed.

[0012]

[Action]

 The water blocking material 1 fits the concave groove 3 on the inner peripheral surface side 2a to the tip edge portion of the rib 11 of the rib pipe 10 and is mounted along the rib 11. Then, the rib pipe 10 fitted with the water blocking material 1 is inserted into the connection port 12a of the manhole 12 and connected. A filling material 13 is filled between the rib pipe 10 and the connection port 12a of the manhole 12 to fix each other. As a result, the connecting end portion 10a of the rib pipe 10 has a large surface area of the interface due to the water blocking material 1, and the generation of a gap due to edge breakage is prevented.

Further, even if a gap is created at the interface with the rib pipe 10 due to edge cutting and water leaks from inside the manhole 12 or water leaks from outside the manhole 12, the groove 3 and the outer peripheral surface made of a water-expandable material are formed. The gap is closed by the strip-shaped portion 6 made of the water-expandable material on the side 2b to prevent water leakage and water infiltration.

[0014]

【Example】

 Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the waterproof material according to the present invention, and FIG. 2 is a side sectional view showing a usage state of the waterproof material according to the embodiment.

As shown in FIG. 1, a water blocking material 1 for a manhole joint of the present embodiment (hereinafter referred to as a water blocking material) has an annular rubber ring 2 having a substantially W-shaped cross section as a main body. . In this rubber ring 2, a base end 2a on the inner peripheral surface side is formed in a tapered shape, and a concave groove 3 is formed in the central portion of the base end 2a so as to continuously open in the circumferential direction. The groove 3 is made of a substantially U-shaped water-expandable material 4 and is formed integrally with the rubber ring 2.

Further, on the outer peripheral surface side 2 b of the rubber ring 2, both edge portions thereof are formed as a pair of protrusions 5 and 5 which are continuous in the circumferential direction of the rubber ring 2. A space between the ridges 5 and 5 is a flat band-shaped portion 6 made of a water-expandable material, which is formed integrally with the rubber ring 2.

The material of the concave groove 3 on the inner peripheral surface side (2a) and the strip-shaped portion 6 on the outer peripheral surface side 2b is, for example, natural rubber, synthetic cis-1,4-polyisoprene rubber, polybutadiene rubber, Styrene-diene random copolymer rubber, acrylonitrile-diene copolymer rubber, isobutylene-isoprene copolymer rubber, ethylene-propylene-diene copolymer rubber, trans-1,4-polyisoprene rubber, styrene-diene block copolymer rubber A diene rubber such as, for example, flexible chloroprene rubber or chlorosulfonated polyethylene with a super absorbent polymer, a metal oxide vulcanizing agent, a vulcanization accelerator, a filler, an antiaging agent, etc. It is said that the blended mixture was vulcanized and molded.

As shown in FIG. 2, the water blocking material 1 described above is a connection in which a rib pipe 10 is connected to a manhole with respect to a rib pipe 10 having a plurality of circumferentially continuous ribs 11 formed on its outer circumference. The groove 3 is fitted and attached to the tip edge of the rib 11 of the end 10a.

Then, as shown in FIG. 3, the connection end portion 10 a of the rib pipe 10 having the water blocking material 1 attached thereto is inserted into the connection port 12 a of the manhole 12 to connect the inner peripheral surface of the connection port 10 a and the rib pipe 10. The manhole 12 and the rib pipe 10 are fixedly connected to each other by filling a non-shrinkable filler 13 such as mortar or epoxy resin between the outer peripheral surface of the end 10a. It is preferable that the position where the water blocking material 1 is attached to the rib pipe 10 is located at a substantially central portion corresponding to the thickness of the side wall of the manhole 12 when connected to the manhole 12.

Therefore, according to the water blocking material 1 configured as described above, at the connecting portion of the rib pipe 10 connected to the manhole 12, the water blocking material 1 having the water-expandable material at the tip edge portion of the rib 11 is formed. Since the area of the contacting interface between the filling material 13 and the rib pipe 10 is not the tip edge portion of the rib 11 of the rib pipe 10 and the filling material 13, the outer circumferential surface side of the water blocking material 1 is attached. 2b and the filler 13 become large and become large, so that it is possible to prevent a gap from being generated at the interface between the filler 13 and the rib pipe 10 due to edge cutting.

When a gap is created at the interface between the filler 13 and the rib pipe 10 due to edge cutting, even if water leaks from inside the manhole 12 or water leaks from outside the manhole 12, the water blocking material Since the concave groove 3 on the inner peripheral surface side of No. 1 is made of a water-expandable material, it can be prevented, and leakage and infiltration of water on the filling material 13 side can be prevented from occurring on the outer peripheral surface side 2b of the water blocking material 1. 5 and the strip 6 can prevent this.

Further, since the water blocking material 1 has a structure to be mounted on the tip edge portion of the rib 11 more than the conventional water blocking material provided between the ribs, it is suitable for the rib pipe 10. Since it can be easily installed, the work time can be shortened and the work can be done easily without any skill.

The waterproof material 1 is not limited to the shape of the above-described embodiment, and for example, as shown in FIG. 4 (a), both edge portions of the outer peripheral surface side 2 b of the waterproof material 1 described above may be used. The water blocking member 20 may be formed by forming a protruding portion 21 extending in a wing shape in the width direction of the rubber ring 2 and having a protruding piece 22 that protrudes a part of the flat belt-shaped portion 6, In addition to the same effect as the water blocking material 1, the extended portion can further increase the area of the interface with the filling material 13, and the water blocking material 20 can be embedded in the filling material 13 side. In addition, it is possible to further improve the prevention of water leakage and water infiltration due to the gap caused by the edge cutting.

Further, as shown in FIG. 4 (b), a plurality of water blocking members 20 (see FIG. 4 (a)) are arranged on adjacent ribs 11, for example, two as shown in the figure. By installing this, the water blocking effect can be further improved.

Further, as shown in FIG. 4C, by forming a water blocking material 30 in which a plurality of the water blocking materials 1 of the above-described embodiment are connected, the area of the interface is increased and the water blocking is performed. You can improve the effect.

As described above, when the water blocking members 20 and 30 formed continuously or connected to each other are attached to the ribs 11, not only the water blocking effect is improved but also the filler 13 and the rib pipe 10 are connected. It can also be used as a cushioning material between the two, and it is possible to mitigate, for example, edge breakage due to the sinking of the manhole 12.

[0027]

[Effect of device]

 As described above, the water blocking material for a manhole joint according to the present invention is fitted with a water blocking material having a water-expandable material at the tip edge portion of the rib so that the filling material and the tip edge portion of the rib are connected to each other. Since the area of contact with each other is increased, it is possible to prevent the occurrence of a gap due to edge cutting at the interface between the filler and the rib pipe.

In addition, even if a gap is created at the interface between the filling material and the rib pipe due to edge cutting, and water leaks from inside the manhole or water leaks from outside the manhole, the concave groove and the outer circumference made of a water-expandable material By expanding the surface-side band-shaped portion made of a water-expandable material, the gap can be closed to prevent water leakage and water infiltration.

Further, since the waterproof material is attached to the tip end portion of the rib by the groove groove, the attachment to the rib pipe can be performed easily, so that the working time can be shortened and the skill is not required. There is an effect that it can be a work.

Further, since this water blocking material is attached to the tip edge portion of the rib as described above, it has an effect as a cushioning material and an effect that it is possible to reduce edge breakage due to sinking of a manhole or the like. There is.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a water blocking material according to the present invention.

FIG. 2 is a side sectional view showing a usage state of the water blocking material of the embodiment.

FIG. 3 is a side sectional view showing a state in which a rib pipe is connected to a manhole.

4A, 4B, and 4C are sectional views showing another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Water stop material, 2a ... Inner peripheral surface side (base end), 2b ... Outer peripheral surface side, 3 ... Recessed groove line, 4 ... Water-expandable material, 5 ... Projection line, 6 ... Strip portion, 10 ... Rib pipe, 10a ... connection end, 11 ... rib, 12 ... manhole, 12a ... connection port.

Claims (2)

[Scope of utility model registration request] 1. A ring-shaped water stop material having a grooved groove made of a water-expandable material formed on the inner peripheral surface side, and formed at a connection end of a rib pipe inserted and connected to a connection hole of a manhole. A water blocking material for a manhole joint, characterized in that the groove is fitted on the tip edge of the rib and is mounted along the rib. 2. The water blocking material according to claim 1, wherein a pair of protrusions are formed in a circumferential direction on the outer peripheral surface side, and a band-shaped portion made of a water-expandable material is formed between the pair of protrusions. A water blocking material for manhole joints, characterized by