JPH0415042B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a drilling/pipe connection device for small-diameter buried pipes, particularly for small-diameter pipes such as hume pipes, steel pipes, and vinyl chloride pipes buried by the push-in method. The present invention relates to a device that makes it possible to connect pipes without using excavation work as much as possible.

[Conventional technology and its problems] In order to connect branch pipes connected to each home to this type of small-diameter buried pipe, it is necessary to excavate the ground surface and install the small-diameter buried pipe in a position where it will not interfere with other buried objects. Piercing from the outside,
A branch pipe was connected to this hole from the outside. For this reason, it required work to excavate the ground surface, which was inconvenient for construction in urban areas.

On the other hand, as in Japanese Utility Model Application Publication No. 57-95739, for example, by installing a machine frame that holds a cutter equipped with a rotational drive mechanism and a feed mechanism inside the buried pipe via a fixture, it is possible to cut the ground surface. A drilling machine is disclosed that can perform drilling work from the inner peripheral side of a buried pipe at a desired position without digging.

However, these conventional drilling machines have the trouble of having to move the machine frame to another location after drilling, and then connect the pipes. This method had the drawback of increasing the number of man-hours and significantly reducing efficiency because the drilling machine had to be moved by applying external force using a separate drive device while repeatedly attaching and detaching the fixings. .

[Objective of the Invention] The object of the present invention is to provide a small-diameter underground pipe that can be efficiently and easily connected to a small-diameter pipe buried without excavating the ground surface using the push-in burial method. The object of the present invention is to provide a drilling and pipe connecting device to solve the above problems.

[Summary of the Invention] The present invention comprises a main body that is inserted into a small-diameter buried pipe and includes a drilling device and a pipe connecting device, a rotating device that rotates the main body in a circumferential direction as necessary, and a self-propelled device for the main body. The distance between the drilling device and the pipe connecting device is an integral multiple of the pitch of self-propelled movement of the main body.

[Example] A main body 2 inserted into a small-diameter buried pipe 1 and equipped with a punching device A and a pipe connecting device B, a rotating device C that rotates the main body 2 in the circumferential direction as necessary, and the main body 2
More specifically, as shown in FIG. 1, it is a drilling device that moves up and down a tubular body 2 having a diameter that can be inserted into a small-diameter buried pipe 1 while rotating a drill cutter 3. Pipe connection device B that lifts and lowers A and a receiver 5 equipped with a pipe connection sleeve 4
are arranged in parallel, and locking devices 6 and 6' for the inner wall of the small-diameter buried pipe 1 are provided on both sides of the main body 2 so as to be freely rotatable in the circumferential direction via bearings 7, A telescopic device 8 is interposed between them to form a self-propelled moving device D, and a circumferential rotation device C for the tube 1 is interposed between the main body 2 and one locking device 6, as shown in FIG. As shown in A, after locking one locking device 6 and releasing the other locking device 6' in the small-diameter buried pipe 1, extend the telescopic device 8 by a predetermined amount, and then conversely lock the locking device 6' and release the locking device. The main body 2 is moved by itself at regular intervals to a predetermined location by repeating the operation of canceling 6 and reducing the same size as described above. Next, as shown in FIG. 2B, both locking devices 6 and 6' are locked, and the circumferential rotation device C is activated to move the main body 2 so that the drill cutter 3 faces in a direction that will not interfere with other buried objects. It rotates like A and B. The drilling device A is operated and the drill cutter 3 is rotated and raised to drill into the buried pipe 1 from the inside. Furthermore, the drill cutter 3 is returned to its original position as shown in FIG. Thereafter, as shown in FIG. 2D and E, a small diameter hole 10 is drilled on the ground surface for the perforated portion 9, and the branch pipe 11 is inserted into the hole 10, and the pipe connecting device B is operated to raise the receiver 5. By doing this, the sleeve 4 is fitted into the perforation 9 of the buried pipe 1, and at the same time, the branch pipe 11 is press-fitted into the sleeve 4 to connect the branch pipe 11 to the buried pipe 1.

The pipe connecting device B is used to insert the sleeve 4 when the buried pipe 1 and the branch pipe 11 are Huum pipes.
In the case of steel pipes, welding is performed, and in the case of vinyl chloride pipes, thermoplastic processing may be performed using high frequency or ultrasonic waves as shown in FIGS. 9A and 9B. 1
2 is an encoder that measures the rotation angle of the main body 2 in the circumferential direction. The distance between the drilling device A and the pipe connecting device B is set to be an integral multiple of the pitch of self-propelled movement of the main body 2.

The drilling device A has a pedestal 14 movable up and down on the main body 2 by a plurality of hydraulic cylinders 13, and a cutter shaft tube 16 on which a drill cutter 3 is attached is pivotally supported on the pedestal 14 via a bearing 15. A rotating shaft 16b is provided at the center of the shaft tube 16 via a spline 16a so as to be freely movable in the longitudinal direction, and a hydraulic motor 18 is connected to the rotating shaft 16b via a gear 17. It is transmitted from the rotating shaft 16b to the spline 16a.
The hydraulic cylinder 13 rotates the drill cutter 3 through the cutter shaft tube 16.
The pedestal 14 connected to the piston 13a by the operation of
moves up, and the cutter shaft tube 16 and drill cutter 3 rise together with the pedestal 14 to drill into the small diameter buried pipe 1 from the inside. In this case, the spline 16a allows the drill cutter 3 to rotate smoothly.

The pipe connecting device B connects the hydraulic cylinder 1 to the main body 2.
9, a receiver 22 having a step 21 is provided on the piston 19a via a centering spring spring 20, and the sleeve 4 is placed on the step 21 of the receiver 22. As the piston 19a rises, the receiver 22
Accordingly, the sleeve 4 is connected to the perforation 9 of the small-diameter buried pipe 1.
will be installed on the

The main body circumferential rotation device C has a hydraulic motor 23 fixed to the main body 2 side, and an internal gear 25 is provided in the pipe portion 24 of one locking device 6.
The drive gear 26 of the hydraulic motor 23 is engaged with the drive gear 26 of the hydraulic motor 23, and by operating the hydraulic motor 23 with the locking devices 6 and 6' locked to the main body 2, the main body 2 is rotated through the gears 25 and 26. Rotate in the direction.

The self-propelled moving device D consists of lock devices 6, 6' and a telescopic device 8, and the lock devices 6, 6' are connected to the pipe section 24.
A plurality of guide rollers 32 are disposed around the periphery of the main body 2, and a cam 28 is movable in the length direction of the main body 2 by the operation of a hydraulic cylinder 27. A plurality of cam grooves 28a are formed in the cam 28, Groove 28a
The pin 30 of the lock pawl 29 is inserted through the cam 28 , and when the cam 28 moves due to the operation of the hydraulic cylinder 32 , the lock pawl 29 comes out and comes out through the pin 30 guided by the cam groove 28 a and presses against the inner wall surface of the small diameter buried pipe 1 . Or cancel it. The expansion and contraction device 8 is the hydraulic cylinder 3
1 is installed in the pipe portion 24 of one of the locking devices 6, and the piston 31a is connected to the main body 2 side, and the hydraulic cylinder 31 is in the locked state when the lock claw 29 of the one locking device 6 is pressed against the inner wall of the buried pipe 1. By activating this, the main body 2 is extended via the guide roller 27 on the side of the other locking device 6'.

Then, in the small-diameter buried pipe 1, the lock pawl 29 is extended by the operation of the hydraulic cylinder 32 to lock one of the lock devices 6, and the other lock device 6' is released by retracting the lock pawl 29, and then the telescopic device is opened. By operating the hydraulic cylinder 31 of No. 8, the main body 2 is moved through the guide roller 27 of the locking device 6'.
Then, the locking device 6' is reversely locked and the locking device 6 is released, and the piston 31a of the hydraulic cylinder 31 is contracted to lock the locking device 6.
It is reduced by the pitch via the side guide roller 27,
By repeating this operation, the main body 2 is moved intermittently by itself to a predetermined location at a predetermined pitch. Next, both the locking devices 6 and 6' are locked, and the main body 2 is rotated via the gears 25 and 26 by the operation of the hydraulic motor 23, and then the hydraulic cylinder 13 and the hydraulic motor 18 are operated to rotate the drill cutter 3. The small-diameter buried pipe 1 is drilled from the inside by moving up and down while rotating. Next, the receiver 22 moves by itself in the same manner as described above and places the sleeve 4 in the nine perforated portions.
The sleeve 4 is fitted into the perforated portion 9 by the operation of the hydraulic cylinder 19, and the branch pipe 11 is press-fitted into the sleeve 4.

As described above, by the self-propelled movement of the main body 2, it is possible to automatically drill holes at desired locations in the small-diameter buried pipe 1 from the inside, and the branch pipe 11 can be connected from the inside.
There is no need to unnecessarily excavate the ground surface, and it has an excellent effect on pipe connections in cities.

Moreover, by arranging the drilling device A and the pipe connecting device B at an interval that is an integral multiple of the pitch of self-propelled movement, the main body 2
Simply move the pipe connecting device B to the specified number of pitches.
Since the branch pipe 11 quickly moves to the position of the perforation 9, it becomes possible to connect the branch pipe 11 to the perforation 9 efficiently and easily.

In this case, it is necessary to make a hole for the tube insertion point.

[Effects of the Invention] The present invention provides a main body that is inserted into a small-diameter buried pipe and includes a drilling device and a pipe connecting device, a rotation device that rotates the main body in the circumferential direction as necessary, and a self-propelled device for the main body. The pipe is arranged so that the distance between the drilling device and the pipe connecting device is an integral multiple of the pitch of self-propelled movement of the main body, and the push-in burial method is used to create a pipe without excavating the ground surface. It is possible to provide a drilling/pipe connection device for a small-diameter buried pipe that can efficiently and easily connect a small-diameter buried pipe.

[Brief explanation of drawings]

Fig. 1 is a construction state diagram using the construction method of the present invention, Figs. 2 A to E are construction state diagrams showing the construction order, and Fig. 3 A,
B is a diagram of the circumferential rotation state of the main body, FIGS. 4 and 5 are cross-sectional views of the punching device, FIG. 6 is a cross-sectional view of the rotating device and the pipe connection, and FIG. 7 is the locking device and the expansion and contraction device. FIG. 8 is a partially cutaway front view of the lock pawl, and FIGS. 9A and 9B are cross-sectional views showing the state of plastic working. 1...Small diameter buried pipe, 2...Main body, A...Drilling device,
B...Pipe connection device, C...Rotating device, D...Self-propelled moving device.

Claims (1)

[Claims] 1 Consists of a main body inserted into a small-diameter buried pipe and equipped with a drilling device and a pipe connecting device, a rotating device that rotates in the circumferential direction of the main body as necessary, and a self-propelled device for the main body, A device for drilling and connecting pipes for small-diameter buried pipes, characterized in that the distance between the device and the pipe connecting device is an integral multiple of the pitch of self-propelled movement of the main body.