JPH08109648A - Seal construction of sewer mounting section of manhole - Google Patents

Abstract

PURPOSE: To sufficiently absorb the eccentricities or variations in the time of execution and enhance the cut-off efficiency in seal construction of a sewer mounting section of a manhole. CONSTITUTION: In seal construction of a mounting section of a sewer 2 on a side wall 1a of a manhole, a ring-shaped rubber tube 4 is fitted to the circumference of the sewer 2. After the sewer 2 is inserted into a mounting hole 3 bored in the side wall 1a of the manhole, a filler 5 is injected in the rubber tube 4, and the rubber tube 4 is expanded and is sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure for mounting a sewer pipe on a side wall of a manhole.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 6, a manhole 1 is installed at a predetermined interval in the middle of a sewer pipe 2 disposed underground, and an inspection of the blockage of the sewer pipe 2 is performed. Conventionally, as shown in FIG. 7, a ring-shaped gasket 12 is fitted into a mounting hole 3 formed in a side wall 1a of a manhole 1, and then a sewage pipe 2 made of vinyl chloride is inserted and mounted.

[0003]

However, since the gasket 12 supports the sewer pipe 2 with the weak sealing lip 13, the eccentricity and variations during construction cannot be sufficiently absorbed.
Therefore, there is a problem that the mounting work becomes difficult and the water blocking property becomes insufficient. In view of the conventional problems, it is an object of the present invention to provide a seal structure for a sewer pipe mounting portion of a manhole that can sufficiently absorb eccentricity and variations during construction and that also has sufficient water shutoff.

[0004]

In order to achieve such an object, the structure of the present invention has a manhole 1 as shown in FIG.
After the ring-shaped rubber tube 4 is fitted to the outer periphery of the sewer pipe 2 in the sealing structure of the mounting portion of the sewer pipe 2 of the side wall 1a, and the sewer pipe 2 is inserted into the mounting hole 3 opened in the side wall 1a of the manhole 1. The filler 5 is injected into the rubber tube 4 to inflate and seal the rubber tube 4.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 6, the manhole 1 made of concrete is installed at a predetermined interval in the middle of a sewer pipe 2 made of vinyl chloride, which is installed underground. Reference numeral 1a shown in FIG. 1 is a side wall of the manhole 1 in which a mounting hole 3 is opened. A ring-shaped rubber tube 4 as shown in FIG. 2 is fitted on the outer periphery of the sewer pipe 2 before the sewer pipe 2 is inserted into and attached to the mounting hole 3, and then, as shown in FIG. The sewer pipe 2 is inserted into the mounting hole 3 together with the rubber tube 4. The rubber tube 4 may be made of natural rubber, butyl rubber, EPDM (ethylene / propylene / diene copolymer rubber), CR (chloroprene rubber), or the like.
Natural rubber, which has a high elongation rate and is hard to break, is preferable.

When the filler 5 such as air, water, urethane-based or polybutadiene-based sealing material is injected through the injection port 4a provided with the valve v of the rubber tube 4, the rubber tube 4 is shown in FIG. As described above, the gap C between the mounting hole 3 and the sewer pipe 2 is swollen as described above, and the gap C is reliably sealed.
As described above, since the sewage pipe 2 is inserted into the mounting hole 3 with the rubber tube 4 being flat, the construction is easy, and the supporting force of the rubber tube 4 swollen with the filling 5 is large, so that eccentricity during construction or Variations are fully absorbed. It should be noted that if the filling 5 is air, it is easy to come off, which is not preferable.

Further, if an adhesive 6 is applied to each of the sides of the rubber tube 4 which are in contact with the mounting hole 3 and the sewer pipe 2, the sealing property is further enhanced, and by filling the gap C with the mortar 7, the sealing property and the supporting force are improved. Can increase. It should be noted that the urethane-based or polybutadiene-based sealing material of the filler 5 has a property of gradually solidifying into a rubber-like elastic body when a liquid main agent and a curing agent are mixed and used. Therefore, when injected into the rubber tube 4, it is easy to inject in a liquid state, and a sufficient supporting force is exerted as an elastic body over time.

4 (a), 4 (b) and 5 (a),
(B) shows rubber tubes 8 and 9 of other embodiments,
Each of them has a quadrangular cross-sectional shape, and the former has a water-expansion rubber material 10 and the latter has a butyl adhesive material 11 attached to the contact surfaces. When the filler is injected into the hollow portions 8a and 9a, they expand as shown in FIGS. 4 (b) and 5 (b).

[0009]

As described above, the sealing structure of the sewer pipe mounting portion of the manhole of the present invention has a structure in which a sewer pipe fitted with a ring-shaped rubber tube is inserted into the mounting hole of the manhole.
Since the filling material is injected into the rubber tube and swells, unlike the conventional gaskets, eccentricity and variations during construction can be sufficiently absorbed, construction work becomes easy, and water blocking performance is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a seal structure of a sewer pipe mounting portion of a manhole of the present invention.

FIG. 2 is a front view of the above rubber tube.

FIG. 3 is a cross-sectional view showing a state where the rubber tube of FIG. 1 is inflated.

FIG. 4 (a) is a cross-sectional view of another embodiment of the rubber tube of the same.

FIG. 4 (b) is a horizontal cross-sectional view of the same rubber tube inflated.

FIG. 5 (a) is a cross-sectional view of another embodiment of the rubber tube of the same.

FIG. 5 (b) is a transverse cross-sectional view of the same rubber tube inflated.

FIG. 6 is a cross-sectional view showing a state in which a manhole and a sewer pipe are provided underground.

FIG. 7 is a sectional view of a conventional seal structure of a sewer pipe mounting portion of a manhole.

[Explanation of symbols]

 1 Manhole 1a Sidewall 2 Sewage pipe 3 Mounting hole 4 Rubber tube 4a Injection port 5 Filler 6 Adhesive 7 Mortar 8 Rubber tube 8a Hollow part 9 Rubber tube 9a Hollow part 10 Water expansion rubber material 11 Butyl adhesive material C Gap

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 26, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

[Title of the Invention] Seal structure for sewer pipe mounting part of manhole

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a sectional view of a seal structure of a sewer pipe mounting portion of a manhole of the present invention.

FIG. 2 is a front view of the above rubber tube.

FIG. 3 is a cross-sectional view of the rubber tube of FIG. 1 in an inflated state.

4 (a) is a cross-sectional view of another embodiment of the rubber tube of FIG. 1, and FIG. 4 (b) is a cross-sectional view of the same rubber tube when inflated.

5 (a) is a cross-sectional view of another embodiment of the rubber tube of FIG. 1, and FIG. 5 (b) is a cross-sectional view of the same rubber tube when inflated.

FIG. 6 is a cross-sectional view showing a state in which a manhole and a sewer pipe are provided underground.

FIG. 7 is a sectional view of a conventional seal structure of a sewer pipe mounting portion of a manhole.

[Explanation of symbols] 1 Manhole 1a Side wall 2 Sewage pipe 3 Mounting hole 4 Rubber tube 4a Injection port 5 Filler 6 Adhesive 7 Mortar 8 Rubber tube 8a Hollow part 9 Rubber tube 10 Water expansion rubber material 11 Butyl adhesive material C Gap

Claims (1)

[Claims] 1. A seal structure for a sewer pipe mounting portion of a manhole side wall, wherein a ring-shaped rubber tube is fitted to the outer periphery of the sewer pipe, and the sewer pipe is inserted into a mounting hole formed in the manhole side wall, and then the rubber is formed. A seal structure for a manhole sewer pipe mounting portion, characterized in that a filling material is injected into the tube to inflate the rubber tube for sealing.