JPH0126246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to an improvement in a method for attaching a spirally corrugated conduit to a manhole wall or the like.

In recent years, plastic corrugated pipes have been used as cable conduits between manholes for underground wiring, etc., but the joints between the corrugated pipes and the manhole walls are required to be highly watertight.

Conventionally, a corrugated pipe, which is a conduit, is inserted into an insertion hole in a manhole wall, and a worker presses mortar into the gap between the insertion hole and the outer surface of the conduit to make it watertight. However, there were various problems with this work, including the following.

(i) It takes a lot of time to center the pipe into the insertion hole, watertightly fill it with mortar, etc., and it not only requires a high level of experience and skill from the operator, but also reduces work efficiency because these tasks are performed in a narrow space. (ii) It is difficult to guarantee the above-mentioned watertightness even if the work is carried out by skilled workers; (iii) A period of mortar curing is required.

As a result of intensive studies to solve these problems, the inventors discovered that these problems could be overcome by using a jig with a simple structure, which will be described in detail later. It has arrived.

That is, the present invention provides a through hole provided in a manhole wall, etc., which has a threaded portion on its inner surface that screws into a spiral corrugated pipe that is loosely inserted into the through hole from the outside of the wall. A pre-screwed spiral corrugated pipe is loosely inserted into a socket-like member consisting of a fitting part to be fitted inside and a closing wall of a through hole extending therein, with the fitting part side facing the pipe end, and then the above-mentioned After screwing a socket-like member having the same structure as above to the tube end protruding to the other side of the wall through-hole with its closing wall facing toward the tube end, the gap between the spirally corrugated tube and the through-hole is loosely inserted. After filling the inside with a watertight filler, one side of the through hole is closed with the closing wall of one socket-shaped member screwed onto the spirally corrugated pipe, and then the screw of the other socket-shaped member is closed. This is a method for attaching a pipe to a manhole wall, etc., characterized in that the watertight filler filled in the through hole by rotating is pressed to tightly fill the through hole.

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a wall such as a manhole, and the wall 1 has a through hole 2 provided therein.

The end of a spiral corrugated tube 3, which is a cable conduit having a thickness that creates a certain gap with the through hole 2, is loosely inserted from the wall B side into the through hole 2. A socket-shaped member 4 is screw-fitted to the end portion so as to be located outside the wall portion 1 in advance.

When the socket-shaped member 4 screwed into the pipe end in advance is rotated and propelled inward into the wall 1, the gap between the through hole 2 and the outer surface of the corrugated pipe 3 is closed as shown in the figure. The insertion portion 4b that is inserted into the insertion portion 4b and the closing wall 4c of the through hole 2 extending therein are integrated, and 4a is a screw hole.

A socket-shaped member 4' having the same structure as described above is attached to the end portion of the corrugated tube 3 which is inserted into the through hole 2 and protrudes inside the wall 1, that is, toward the wall A side, and is oriented in the opposite direction. They are installed opposite each other by screw fitting.

Next, the gap between the through hole 2 and the corrugated tube 3 is filled with an appropriate amount of watertight filler 5.

In this case, the most preferred operation of the invention is carried out as follows. First, the socket-shaped members 4, 4'
By screwing either one of them, push it toward the insertion part 4b side and close the opening of the through hole 2 on the same side,
Insert an appropriate amount of the watertight filler 5 from the opening on the other side, screw the other socket-shaped member 4, 4' to propel it from the other side, and press and fill the gap in the figure with the filler 5 to complete the work. It ends. Of course, depending on the nature of the work, it may be desirable to alternately screw both the socket-like members 4, 4' to optimally fill the space with the inserted filler.

The watertight filler 5 of the present invention can be of almost any type as long as it is pressurized and filled in the gap by the propulsion of the socket-shaped members 4, 4', and also flows appropriately into small gaps to fill them. Can be used without exception.

As is clear from the above description, in this invention, when the pipe is installed, the pipe, that is, the corrugated pipe, is supported in the through-hole by a socket-shaped part, so that the centering of the wall of a manhole or the like in the through-hole can be done accurately and mechanically. In addition, the watertight filling material is very advantageous in terms of work efficiency, as the work can be completed in a short time by simply inserting the appropriate amount, and the work does not require much experience or skill. The screwdriver of the shaped member ensures that the watertight filling material is filled into the gap, ensuring watertightness, and the next work can be carried out immediately without waiting for the mortar to cure. It has a sweeping effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part explaining an embodiment of the present invention, and FIG. 2 is a sectional view of a jig, that is, a socket-shaped member used in the present invention. 1...Wall part, 2...Through hole, 3...Corrugated pipe, 4
...Socket-shaped member, 5...Filling material.

Claims (1)

[Claims] 1 A through-hole provided in a manhole wall, etc., has a threaded part on its inner surface that is screw-fitted to a spiral corrugated pipe that is loosely inserted into the through-hole from the outside of the wall, and is inserted into the through-hole. A spiral corrugated pipe that has been screwed in advance is loosely inserted into a socket-like member consisting of a fitting part and a closing wall of a through hole extending therethrough, with the fitting part side facing the pipe end, and then the socket member is inserted through the wall part. A socket-like member having the same structure as above is screwed onto the tube end protruding to the other side of the hole with its closing wall facing toward the tube end, and then a water-tight seal is formed between the loosely inserted helical corrugated tube and the through-hole. After filling with the filler material, one side of the through hole is closed with the closing wall of one socket-shaped member screwed onto the spirally corrugated pipe, and then the other socket-shaped member is advanced with a screwdriver. A method for attaching a conduit to a manhole wall or the like, characterized in that the watertight filler filled in the through hole is pressurized to tightly fill the through hole.