JP2668668B2 - Connection structure between manhole and sewer pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for connecting a manhole and a sewer pipe by inserting a sewer pipe into a lateral hole formed in the manhole.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
The manhole 21 and the sewer pipe 2 are formed by inserting the sewer pipe 23, which is an ENVI pipe or a Hume pipe, into the lateral hole 22 formed in FIG.
When connecting with 3, the rubber packing 26 having a C-shaped cross section is formed into a ring shape in a ring-shaped space formed between the inner peripheral surface 24 of the lateral hole 22 and the outer peripheral surface 25 of the sewer pipe 23. The remaining space is filled with mortar 27 so that the watertightness of the connection between the manhole 21 and the sewer pipe 23 is maintained.

[0003]

In the prior art described above, the rubber packing 26 normally comes into contact with the inner peripheral surface 24 of the lateral hole 22 and the outer peripheral surface 25 of the sewer pipe 23 by some elastic force. However, when the sewer pipe 23 bends due to earth pressure or water pressure in an earthquake or other abnormal situation, a part of the rubber packing 26 is crushed and a gap is formed in the upper and lower parts of the sewer pipe 23. Watertightness may not be maintained only with the mortar 27.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to use a rubber packing and a sewer pipe positioning ring together to ensure safety and reliability. An object of the present invention is to provide a connection structure between a manhole and a sewer pipe which can maintain watertightness.

[0005]

In order to achieve the above object, the connection structure of a manhole and a sewer pipe according to the present invention has a ring shape formed between an inner peripheral surface of a lateral hole and an outer peripheral surface of the sewer pipe. In the space, there are a rubber packing arranged in a ring shape with a C-shaped cross section, a locking part mounted inside the packing from the open part of the C-shaped rubber packing, the inner circumference of the lateral hole and the outer circumference of the sewer pipe. A plastic sewer pipe positioning ring having a circular section in contact with the plastic sewer pipe positioning ring is provided.

In addition, a part of the sewer pipe positioning ring is cut, and the cut surfaces are diagonally opposed to each other.

[0007]

1 and 2 relate to an embodiment of the present invention. FIG. 1 is a sectional view of a connection structure between a manhole and a sewer pipe according to the present invention, and FIG. -It is A sectional drawing.

In the figure, reference numeral 1 is a wall which constitutes a part of a manhole, and the manhole wall 1 is provided with a lateral hole 3 through which a sewer pipe 2 made of an ENVI pipe or a Hume pipe is inserted. It is perforated, and a ring-shaped space is formed between the inner peripheral surface 4 of the lateral hole 3 and the outer peripheral surface 5 of the sewer pipe 2.

A rubber packing 6 having a C-shaped cross section is arranged in a ring shape in the space, and the C-shaped rubber packing 6 is provided inside the packing from the opening 7 of the C-shaped rubber packing 6. A locking portion 8 for locking 6 is internally provided, and the locking portion 8 is integrally molded with a circular cross-sectional portion 9 that contacts the inner circumference 4 of the lateral hole and the outer circumference 5 of the sewer pipe to form a sewer pipe positioning ring. 10. And
In the space, the mortar 11 is filled in the entire space except the rubber packing 6 and the sewer pipe positioning ring 10.

Since the manhole 1 and the sewer pipe 2 having the above-mentioned structure are connected to each other, the sewage is conveyed in the sewer pipe 2, but the sewage outside the manhole 1 is mortar 11 and It is not blocked by the rubber packing 6 and does not enter the manhole 1. Then, a plastic sewer pipe positioning ring 10 having a locking portion 8 for locking the rubber packing 6 forms a circular portion 9 in the lateral hole inner circumference 4 thereof.
And the outer circumference 5 of the sewer pipe, the pressing force from the sewer pipe 2 is received by the sewer pipe positioning ring 10, and the sewer pipe 2 is connected to the manhole.
The rubber packing 6 is always maintained at a predetermined distance from the ruler 1.
In particular, the pressing force from the sewer pipe 2 is not particularly applied, and the seal between the lateral hole inner circumference 4 and the sewer outer circumference 5 is always maintained.

Even if the sewer pipe 2 is slightly bent due to earth pressure or water pressure in an abnormal situation such as an earthquake, since the sewer pipe positioning ring 10 is made of plastic, the deflection is corrected by the sewer pipe positioning ring 10. Thus, the sewage and the like on the outside of the manhole 1 is blocked by the mortar 11 and the rubber packing 6 without affecting the rubber packing 6 particularly.
It does not invade.

As shown in FIG. 2, when the sewer pipe positioning ring 10 has a state in which a part of the ring is cut and the cut surfaces 12 and 13 are diagonally opposed to each other, The sewer pipe positioning ring 10 has flexibility, and in the abnormal situation, the sewer pipe positioning ring 10 expands and contracts so that the sewer pipe 2 is not unduly stressed and the sewer pipe 2 is not damaged.

[0013]

According to the present invention, a rubber packing having a C-shaped cross section and arranged in a ring shape in a ring-shaped space formed between the inner peripheral surface of the lateral hole and the outer peripheral surface of the sewer pipe, and the C-shaped rubber packing. A plastic sewer pipe positioning ring having a locking portion to be mounted in the packing from the open portion of the V-shaped rubber packing, and a circular cross-section portion that contacts the inner circumference of the lateral hole and the outer circumference of the sewer pipe is provided. As a result, the rubber packing does not exert an unreasonable force and the sealing between the inner circumference of the lateral hole and the outer circumference of the sewer pipe can be maintained at all times, and safe and reliable water tightness can be maintained between the manhole and the sewer pipe It becomes a connection structure.

Further, when a part of the sewer pipe positioning ring is cut and the cut surfaces are obliquely opposed to each other, the sewer pipe positioning ring is provided with flexibility and sewer pipes in an abnormal situation. The pipe positioning ring expands and contracts, the sewer pipe is not unduly stressed, the sewer pipe is not damaged, and the connection structure between the manhole and the sewer pipe can be kept safe and reliable.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of essential parts of a connection structure for connecting a manhole and a sewer pipe according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of a conventional connection structure between a manhole and a sewer pipe.

[Description of Signs] 1 Manhole 2 Sewer pipe 3 Side hole 4 Inner surface of side hole 5 Outer surface of sewer pipe 6 Rubber packing 7 Opening part 8 Locking part 9 Circular part 10 Sewer pipe positioning ring 12, 13 Cut surface

Claims (2)

(57) [Claims] 1. A method for connecting a manhole and a sewer pipe by inserting a sewer pipe into a lateral hole formed in a manhole, wherein the manhole is formed between an inner peripheral surface of the lateral hole and an outer peripheral surface of the sewer pipe. A rubber packing arranged in a ring shape with a C-shaped cross section in a ring-shaped space, a locking portion mounted inside the packing from an opening portion of the C-shaped rubber packing, an inner circumference of the lateral hole, and a sewer pipe. A connecting structure for a manhole and a sewer pipe, wherein a sewer pipe positioning ring made of plastic having a circular cross section that contacts the outer periphery is provided. 2. The connecting structure for a manhole and a sewer pipe according to claim 1, wherein a part of the sewer pipe positioning ring is cut, and the cut surfaces are diagonally opposed to each other.