JPH0978616A - Flexible coupling for joining manhole body and sewer pipe, and mounting method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stoppage of water by a method wherein a flexible coupling connecting a manhole body to a sewer pipe is set in a form beforehand on manufacturing the manhole body, and concrete is cast into the form. SOLUTION: This flexible coupling B to be used at a joint between a manhole and a pipe is formed in a tubular shape. The flexible coupling B is set in a form for forming a manhole body A, and concrete is cast into the form, and thereby the flexible coupling B can be mounted on the manhole body A. Then, the pipe is mounted to the flexible coupling B with an outer band 3 fastened. With a universal ring 6 inserted into a gap between the flexible coupling B and the pipe, flexibility is provided for the pipe.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole in a sewer business, and more particularly to a method of mounting a manhole body of a flexible joint at a joint portion of the manhole and a pipe. .

[Prior Art] Conventionally, as a manhole of this type, a flexible joint (B) shown in FIG. 3 is formed on a portion of the manhole body (A) which has been drilled after forming an inner band (2). Manhole body (A)
The manhole attached to is known. The tube is attached to the flexible joint by tightening the outer band (3).

[Problems to be Solved by the Invention] As described in the prior art, after forming a manhole skeleton, holes are made in the mounting portion to lower the product strength of the opening portion, and further, to improve the dimensions and smoothness of the opening portion. Although an inner band was used because of an error, there was a problem in water stopping performance.

In addition, a hole is made after molding the manhole body,
Since the flexible joint is attached, there is a problem that the work is troublesome twice.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to eliminate waste of work and to ensure waterproofness of a flexible joint. In addition, the strength of the opening is maintained.

[Means for Solving the Problems] In order to achieve the above object, in the manhole according to the present invention, a flexible joint used for a joint portion of a manhole and a pipe is mounted at the time of molding the manhole body, A protrusion is provided on the surface side that contacts concrete.

[Operation] The flexible joint is fixed by setting it in the form at the same time as manufacturing the manhole skeleton and pouring concrete. The required number of flexible joints is fixed.

[Embodiment] An embodiment will be described with reference to the drawings. 1-2, manhole skeleton (A)
Is a reinforced concrete product, and the flexible joint (B) used for the joint portion between the manhole and the pipe has a thickness of 1.0 mm to 10.0 such as synthetic rubber or vinyl chloride.
It is formed in a cylindrical shape having a wall thickness of about mm. More specifically, this flexible joint is set in a mold (4) for molding the manhole skeleton (A) using a jig such as (1) or without using any jig, and concrete ( By placing 5), the flexible joint (B) becomes
It is attached to the manhole body (A). The pipe is attached to the flexible joint by tightening the outer band (3), and a flexible ring (6) is provided in the gap between the flexible joint and the pipe to make the pipe flexible. insert.

The flexible joint (B) is provided with the protrusion (B1) on the outer side thereof and on the surface side in contact with the concrete, so that the fitting property and the water stopping property are dramatically increased.

Further, in FIG. 3, an inner band which is a conventional technique may be used together.

[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.

Since the flexible joint is mounted at the time of manufacturing the manhole skeleton and the protrusion is provided on the outer side of the manhole skeleton and the surface side in contact with the concrete, reliable waterproofing is obtained.

Since the flexible joint is mounted at the time of manufacturing the manhole body, almost no work is required after the manhole body is molded.

Since the flexible joint is mounted at the time of manufacturing the manhole body, the opening can be reinforced and the required strength can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a flexible joint set in a mold for molding a manhole skeleton.

FIG. 2 is a sectional view of a flexible joint mounted on a manhole body.

FIG. 3 is a cross-sectional view where an inner band, which is a conventional technique, is used together.

FIG. 4 is a sectional view of an essential part of a conventional manhole of this type.

[Explanation of symbols]

 A Manhole frame B Flexible joint B1 Projection 1 Jig 2 Inner band 3 Outer band 4 Formwork 5 Concrete

Claims (3)

[Claims] 1. A flexible joint (B) for joining a manhole skeleton (A) and a sewer pipe is set in a form (4) in advance at the time of manufacturing the manhole skeleton (A), and concrete (5) is poured. By doing so, the flexible joint (B) is attached to the manhole skeleton (A). 2. A flexible joint (B) according to claim 1, wherein the protrusion (B1) is provided on the surface side in contact with the concrete (5). 3. A flexible joint comprising the flexible joint (B) according to claim 1 and claim 2 and an inner band (2) extending from the inside to the outside.