JPH0218136Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of an attachment pipe that connects a rainwater basin, a sewage basin, and a sewer main pipe.

Conventionally, this type of attachment tube has been constructed by fitting a flanged socket into a through hole drilled in the main tube, and fitting and fixing the tip of the attachment tube into the socket. For this reason,
Not only are there surfaces where it is necessary to install sockets every time at the work site, but
If a strong tensile force is applied from the main pipe toward the attachment pipe, the socket inserted into the main pipe must be provided with a flange or secured with screws to prevent the attachment pipe from slipping out of the main pipe. There was the inconvenience of not being able to do so.

As another conventional example, in a branch pipe that connects a buried sewer main pipe and an attachment pipe that passes through a cylindrical hole penetrating the soil, the branch pipe is provided with a brim that is slightly larger than the outside diameter of the attachment pipe. has a branch pipe shape for sewerage pipes that forms a tapered part that is easy to insert into a cylindrical hole in the soil (Utility Model No. 56-159483).
(see publication). This has the advantage of preventing the attachment pipe from shifting over time and protruding into the inner surface of the sewer pipe, impairing the flow of sewage within the sewer pipe. Since the structure is such that it is inserted into a conduit that has been penetrated by a hole, it has the following drawbacks. That is, after excavating a pipe through a hole in soft ground with a high groundwater level using a hole saw or the like. If the attachment pipe is inserted into the pipeline, a large amount of earth and sand will flow into the sewer pipe through the pipeline and the perforated part of the sewer pipe before the attachment pipe is inserted, and the inside of the sewer pipe will be immediately destroyed. There was a problem that it was blocked by a large amount of earth and sand.

This invention was made to eliminate the above-mentioned drawbacks, and its purpose was to allow the mounting pipe to be directly submerged into the soil during excavation without using any flanged sockets or collared branch pipes to connect the mounting pipe. The structure allows the pipe to be buried in the sewer pipe, and the tip of the pipe can be directly attached to the sewer pipe as soon as the excavation is completed, completely preventing earth and sand from entering the main sewer pipe, and making the installation work easy. The purpose of this invention is to provide the general public with a structure of a sewerage attachment pipe that has been devised so that it can be used as a sewerage pipe.

An embodiment of this invention will be described below with reference to the drawings.

1 is a sewer main pipe (hereinafter referred to as main pipe) made of concrete or the like. Reference numeral 2 denotes a through hole bored in the main pipe 1, and its size is slightly larger than the outer diameter of the attachment pipe 3, which will be described later. The through hole 2 is drilled using a boring method using a boring machine equipped with a metal crown at the tip, and is attached to a thread (not shown) on the outer circumferential surface of the rotating rod of the boring machine. Screw the threaded portion 3b formed on the surface,
A threaded portion (not shown) formed on the inner circumferential surface of the metal crown is screwed into the threaded portion 3C formed on the outer circumferential surface of the tip of the mounting tube single body 3, and the mounting tube single body 3 is screwed with a rotating rod of a boring machine. The mounting pipes 3 are sequentially screwed together by rotating together with the metal crown and being pushed in sequentially until reaching the main pipe 1. This will take measures to prevent earth and sand from flowing into the main pipe in soft ground with high groundwater levels. The mounting pipe unit 3 that connects the rainwater basin, the sewage basin 9, and the main pipe 1 is made of a hard synthetic resin such as vinyl chloride in consideration of elasticity when the tip thereof is inserted into the through hole 2. Tip portion 3a of a single mounting tube 3 formed by screwing one or more tubes together via a threaded portion
is connected to main pipe 1. Reference numeral 4 denotes a collar with an external taper 5 fixed to the outer circumferential surface near the tip 3a of the mounting tube unit 3 via adhesive, and is made of a hard synthetic material of the same material as the installation tube unit 3 to ensure strong adhesiveness. Made of resin. As shown in FIG. 1, the mounting position of the collar 4 is such that the threaded portion 3c at the tip of the mounting tube 3 can protrude inward from the inner wall surface 1a of the mounting tube 3. L which is the sum of the height L of crown 7 and the thickness l of sewage main pipe 1
They are integrally bonded and fixed by +l toward the proximal end using an adhesive or heat melting. color 4 taper 5
As shown in Figure 1, the surface is thin at the tip (lower part),
It has a sloped surface such that the base becomes thicker, and is inserted from the tapered tip of the tapered surface 5 toward the through hole 2, and stops by sliding into contact with the upper end of the through hole 2 in the middle of the tapered surface. . At this time, since the mounting tube unit 3 is made of a hard synthetic resin material, it has elasticity, and the tapered surface 5 comes into tight contact with the upper end of the through hole 2. A metal crown 7 is threadedly connected to the threaded portion 3c at the tip of the first mounting pipe unit 3, and the metal crown 7 connects the main pipe 1 to the through hole 2.
When the metal crown is drilled, the metal crown penetrates through the hole 2 and sinks into the main pipe 1, and the mounting pipe 3 also sinks into the soil with the middle of the taper 5 in strong contact with the upper end of the hole 2. Stop access to. When the mounting pipe unit 3 is in a stopped state, the metal crown 7 is removed within the main pipe 1, and the mounting pipe unit 3 protrudes from the inner wall 1a of the main pipe 1.
Cut the tip end so that it is flush with the inner wall 1a. This is to avoid increasing the resistance of the fluid in the main pipe 1. Reference numeral 6 denotes an adhesive filled and solidified in a space 12 surrounded by the tapered 5 surface of the collar 4, the wall surface of the through hole 2, and the outer peripheral surface of the tip 3a of the mounting tube unit 3.
When selecting the adhesive 6, it is a matter of course to use one that has good adhesion to the materials of both the mounting pipe 3 and the main pipe 1. Reference numeral 8 denotes an elastic member such as a rubber ring or a wide rubber band attached to the tip of the tapered surface 5 of the collar 4 as shown in FIG. can be increased.

In the figure, reference numeral 10 indicates the ground surface, and reference numeral 11 indicates a curved pipe connecting the rear end of the attachment pipe 3 to the rainwater basin and the sewage basin 9, respectively.

As can be seen from the above explanation, this device has a threaded attachment part for the rotary rod of a boring machine and other attachment pipes at the end of one or more mounting pipes, and a metal crown at the tip. A collar with an external tapered surface that slides into contact with the upper end of the through hole of the sewer main pipe is fixed on the outer circumferential surface near the tip of the single hard synthetic resin mounting pipe equipped with a threaded mounting part, making it easy to attach to a flanged socket or for mounting. As a result of the construction of the mounting pipe, which allows the adoption of the excavation method using a boring machine, without using any branch pipes with flanges to connect to the pipe, the mounting pipe itself can be directly attached to the threaded part of the rotating rod of the boring machine. Screw the threaded part at the rear end, screw the threaded part of the metal crown directly onto the threaded part at the tip of the mounting pipe, rotate the mounting pipe together with the metal crown using a boring machine, and connect it to the main sewer pipe. The mounting tubes can be threadedly connected one by one by pushing them one after another until they are reached. Therefore, the mounting pipe itself can be buried in the soil while rotating together with the boring machine, and at the same time as the main pipe through-hole is drilled, the tip of the mounting pipe itself can be inserted into the main pipe through-hole, and the outer peripheral surface of the mounting pipe can be inserted. The formed tapered collar can be strongly pushed in until it comes into sliding contact with the upper end of the through hole, making it possible to directly attach the mounting pipe to the sewer main pipe. As a result, it is possible to completely prevent the inflow of earth and sand into the sewer main pipe due to the excavation of the insertion hole for the installation pipe alone, and the installation work can be done easily and quickly, which is an excellent effect never seen before. Especially when installing a single mounting pipe on soft ground, its effectiveness is clearly demonstrated. In addition, the outer tapered collar fixed to the outer peripheral surface near the tip of the single mounting pipe acts as a kind of wedge against the through hole of the main pipe, and can withstand strong pressing force from above.
In addition, the space surrounded by the collar tapered surface, the through-hole wall surface, and the outer circumferential surface of the tip of the mounting tube is filled with adhesive and solidified, and the adhesive acts as a kind of wedge and acts from the inside and outside of the main tube. Not only can the attached pipe be prevented from coming off due to the force applied, but also the water-stopping effect of the attached part is perfect.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention. Figure 1 is a front view of the attached pipe, Figure 2 is a sectional view of the attached pipe connecting the rainwater basin, sewage basin, and main pipe, and Figure 3 is the attached pipe. Fig. 4 is a sectional view of the mounting part of the mounting pipe showing another embodiment. 1...Main pipe, 2...Through hole, 3...Single mounting pipe,
3b, 3c...Threaded portion, 4...Color, 5...Taper, 6...Adhesive, 7...Metal crown.

Claims (1)

[Scope of utility model registration request] A thread for attaching a rotary rod of a boring machine is formed at the base end of the attachment pipe connected between the sewer main pipe and the sewage basin, and a thread for attaching a metal crown is formed at the tip of the attachment pipe. In addition, a tapered collar with an externally tapered surface is integrally fixed at a position closer to the proximal end by a distance greater than the sum of the thickness of the sewer main pipe and the height of the metal crown from the distal end surface of the threaded portion of the distal end edge. A sewer installation pipe featuring: