JPH0724966B2 - Drilling equipment for pipe lining materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforating device for lining an inner surface of a pipe such as an aged water and sewer pipe or a gas pipe which is still laid in the ground, and then making a hole for a branched pipe. Regarding More specifically, the inner surface of the sewer pipe is easily drilled from the branch pipe.

[0002]

2. Description of the Related Art In recent years, water pipes have deteriorated and leaked due to corrosion and damage, resulting in a waste of valuable water resources. In sewerage, the inflow of groundwater and rainwater from outside the pipe increases the flow rate in the pipe, which eventually exceeds the treatment capacity of the terminal treatment plant, which is a problem. In addition, the gas pipe may lead to a serious accident. For this reason, there is a method of replacing the existing pipe, but a method of lining the inner surface of the pipe with a synthetic resin or the like while laying the pipe has been proposed because of an increase in construction cost and interruption of traffic during the construction. In the case of the lining method, the portion of the branch pipe that opens into the main pipe is also lined, so a hole must be made in this portion.

As an apparatus for perforating a coating film on a branch pipe of a gas pipe, Japanese Patent Laid-Open Nos. 58-143998, 58-186600 and 58-14399 are disclosed.
Although those disclosed in Japanese Patent No. 8 and the like are known, in all of them, a bogie is run inside the main pipe, and a boring device mounted on the bogie is used for boring. This type of punching device was excellent as a gas pipe punching device.

[0004]

However, the above-mentioned conventional punching device has problems that the operation is complicated and it is easy to break down, and the environment is bad and it is difficult to handle in a place involving civil works such as sewer. In addition, depending on the arrangement of manholes on site, there were cases where it was not possible to make holes from the main pipe, which was a problem.

It is an object of the present invention to provide a pipe lining material punching device capable of making a hole in a lining material from a branch pipe with a simple structure.

[0006]

The present invention employs the following means in order to achieve the above object.

That is, the present invention comprises: a. A piercing device for piercing a lining material on a pipe inner peripheral surface from a branched pipe branched from the pipe, b. A rotary blade (11) for rotating to perforate the lining material, and c. A flexible shaft (14) for transmitting rotation to the rotary blade (11), d. A flexible outer case (16) for slidingly and rotatably covering the outer circumference of the flexible shaft (14), e. A joint (12) for connecting between the flexible shaft (14) and the rotary blade (11); f. A ring-shaped centripetal fixing part (18) which is provided near the joint (12) and surrounds and supports the outer case (16); g. One end is pivotally supported on the outer periphery of the centripetal fixing part (18) at equal angular intervals, and one end is pivoted in the radial direction of the centripetal fixing part (18) and the other end is in contact with the inner peripheral surface of the branch pipe. A plurality of openable pawls (20), h. Expanding means (24) for expanding these rotating claws (20) in the radial direction by remote control; i. Is a perforating device for a pipe lining material.

[0008]

When the lining material is perforated, the rotary blade is thrust from the branch pipe and lowered along the branch pipe to the lining material. When the rotary blade reaches the lining material, the lowering of the flexible shaft is stopped, and therefore the expanding means is operated to open the rotary claw to position the rotary blade. Then, the flexible shaft at hand is pushed and rotated by a rotary drive device or manually. The rotation of the flexible shaft is transmitted to the rotary blade via the joint, and the rotary blade punches the lining material. The size of the hole is flexible
Between the shaft and the flexible outer case that covers it.
Motion of the rotary blade
U

[0009]

Embodiments Embodiments will be described below with reference to the drawings.
FIG. 1 shows a perforating device for a pipe lining material.
The rotary blade 11 is a cylindrical blade. That is, the rotary blade 11 has a cup shape, and the blade edge is formed by a knife blade. In order to reduce the effect of blade wear, if only the blade can be replaced, the sharpness can be maintained. The cutting edge is held by the same method as the clamping means of the cutting tool for machining. Any blade material can be used as long as it is used as a blade material such as tool steel or high speed steel because the lining material is a relatively soft synthetic resin.

The rotary blade 11 is attached to the joint 12 by the mounting bolt 1
It is attached by 3. At the other end of the joint 12, a mounting hole for the flexible shaft 14 is provided,
The flexible shaft 14 is inserted into this mounting hole and is fixed by a fixing bolt 15. As shown in FIG. 3, the flexible shaft 14 is made of steel piano wire in this embodiment, but synthetic fiber or the like may be used as long as it can withstand the cutting force.

The outer side of the flexible shaft 14 is wrapped in a flexible outer case 16. The outer case 16 is
It is usually made of synthetic resin such as vinyl chloride. Since the flexible shaft 14 and the outer case 16 are in frictional contact with each other, it is desirable to interpose a solid lubricant or the like between them. A thrust bearing 17 is interposed between the end of the outer case 16 and the joint 12, and the outer case 1
It receives the thrust force between 6 and the joint 12.

The centripetal fixing part 18 is fixed to the outer case 16 by a fixing nut 19 having a taper screw. Since the taper screw portion screwed into the fixing nut 19 has a slit in the axial direction, when the taper nut is rotated, the slit portion is deformed and fixed. Centripetal fixing part 1
8 has a groove on the peripheral surface and accommodates the rotary claw 20 therein. Although three rotary claws 20 are provided in the present embodiment, three or more rotary claws 20 may be provided, but optimally three are preferable in terms of centripetal stability.

The rotating claw 20 is rotatable around a shaft 21. A pin 22 is fixed to the peripheral surface of the claw 20, and a wire 24 is connected to the pin 22. 24 of the shaft connected to the pin 22 is through the communication hole 23,
After passing through the guide hole 26 of the fixed guide 25, the rotary drive reaches the end of the flexible wire 14 where it is located and is locked (not shown). The rotating claw 20 is provided with a coil spring (not shown) on the shaft 21 so as to return to the groove of the centripetal fixing part 18 by itself when the wire 24 is not pulled.

FIG. 4 is a sectional view showing the rotary drive unit.
The end of the outer case 16 is in contact with the deflection screw 30,
And it is fitted on the flexible shaft 14. The deflection screw 30 has a thread on its peripheral surface, and a rotary nut 31 is screwed into the thread. A hand 32 is fixed to the peripheral surface of the rotating nut 31 with a screw so that the rotating nut 3 can be manually operated.
1 can be rotated.

The rotating nut 31 includes a spacer 33,
The joint 35 is pressed in the axial direction via the thrust bearing 34. The flexible shaft 14 has a joint 35.
It is fixed with a bolt 36. A shaft hole 38 is provided at the other end of the joint 35, and a drive shaft 37 of a motor 39 is keyed to the shaft hole 38.

How to use When inserting the rotary blade 11 into the branch pipe of the sewer pipe and pushing it in, and confirming that the rotary blade 11 has hit the lining material,
The wire 24 is pulled, the fixing claw 20 is opened, and the outer case 16 is centered and fixed in the branch pipe. When the flexible shaft 14 is rotated by the motor 39 or manually, rotational power is transmitted through the flexible shaft 14, the rotary blade 11 rotates, and the lining material is cut into a circle.

This drilling generally drills the center of the hole. Next, when the handle 32 shown in FIG. 4 is rotated, the spacer 33 and the thrust bearing 34 are sent in the axial direction to cause relative movement between the joint 35 and the flexible outer case 16. Relative movement of the flexible shaft in the case
Since it is possible, the flexible shaft and the outer case are
Tensile stress on the flexible shaft as they slide against each other
However, compressive stress is applied to the outer case. This compression response
The outer case is deformed by force and becomes a kind of buckling state.
As shown in 1, so that the rotary blade 11 swings
Become.

The size of this swing, that is, the diameter of the hole
The size is not necessarily uniform, but the number of times the hand 32 is rotated
It can be adjusted by the amount of transfer. If the rotary blade 11 swings excessively
Even if it does, it will contact the inner peripheral surface of the branch pipe and swing further
There is no problem with perforation because it can not be done. Widen the diameter little by little
The flexible shaft 14 while rotating
Drill a hole with the appropriate outer diameter.

[0019]

As described above in detail, according to the present invention,
Both the flexible shaft and outer case are flexible.
Because it is composed of things, even a winding branch pipe can
Easy operation that can be inserted and rotated
You can make holes in the lining material with. Also, that
The size of the hole can be adjusted with a simple operation. Further expansion
By operating the step remotely, the rotating claw opens and the centripetal fixing part
Since it is fixed inside the pipe, the position of the rotary blade can be determined by a simple operation.
You can

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing this embodiment.

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

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a cross-sectional view showing a rotation drive unit.

[Explanation of symbols]

 11 ... Rotating blade 14 ... Flexible shaft 12 ... Joint 18 ... Centripetal fixing part 20 ... Rotating claw

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takaaki Nakai 2-6-2 Otemachi, Chiyoda-ku, Tokyo Within Tokyo Sewer Service Co., Ltd. (72) Naotake Inoue 2--6, Otemachi, Chiyoda-ku, Tokyo No. 2 in Tokyo Sewer Service Co., Ltd. (72) Inventor Shin-ichi Murakami 8-9-9 Iriya, Adachi-ku, Tokyo Adachi Construction Industry Co., Ltd. (72) Inventor Eki Akimoto 8-chome Iriya, Adachi-ku, Tokyo No. 9 No. 9 Adachi Construction Industry Co., Ltd. (56) References JP-A-52-135568 (JP, A) Sekikai-Sho 60-97215 (JP, U)

Claims (1)

[Claims] 1. A. A piercing device for piercing a lining material on a pipe inner peripheral surface from a branched pipe branched from the pipe, b. A rotary blade (11) for rotating to perforate the lining material, and c. A flexible shaft (14) for transmitting rotation to the rotary blade (11), d. A flexible outer case (16) for slidingly and rotatably covering the outer circumference of the flexible shaft (14), e. A joint (12) for connecting between the flexible shaft (14) and the rotary blade (11); f. A ring-shaped centripetal fixing part (18) which is provided near the joint (12) and surrounds and supports the outer case (16); g. One end is pivotally supported on the outer periphery of the centripetal fixing part (18) at equal angular intervals, and one end is pivoted in the radial direction of the centripetal fixing part (18) and the other end is in contact with the inner peripheral surface of the branch pipe. A plurality of openable pawls (20), h. Expanding means (24) for expanding these rotating claws (20) in the radial direction by remote control; i. Perforating device for pipe lining material.