JPH0518997B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a pipe propulsion device, and in particular to a pipe to be inserted underground, such as a steel pipe for burying electric wires and telephone lines.
When burying small-mouth pipes such as water pipes and gas pipes underground, the pipe is automatically supplied to the propulsion device that excavates the horizontal hole, and the pipe is automatically recovered from the propulsion device.・Regarding recovery equipment.

[Conventional technology]

Conventionally, the supply of pipes to the propulsion device for horizontal hole excavation and the recovery of the pipes from the propulsion device have been carried out by workers inside the shaft or by raising the propulsion device above the shaft. For example, Japanese Patent Application Laid-Open No. 17690/1983 discloses a method of connecting pipes on a shaft. In this method, the tube is first pushed underground and then removed from the propulsion device by an operation from the ground. Next, the propulsion device is pulled up the shaft and a new tube is attached to the propulsion device. Next, this propulsion device is lowered to a predetermined position within the shaft, and the new pipe is connected to the buried pipe and pushed underground by the propulsion device. This operation is repeated to bury the pipe.

[Problem that the invention seeks to solve]

The method for supplying or recovering the tube is to raise the propulsion device onto a shaft and then attach the tube to the propulsion device. Similarly, when recovering the tube, the propulsion device is pulled up into the shaft and then the propulsion device and the tube are separated. Compared to attaching and detaching the propulsion device and pipes in a narrow shaft, this method requires only enough space for the propulsion device to fit into the shaft, and a small shaft can be used even in a narrow space, and workers do not have to enter the shaft. It is also very economical and safe. However, the propulsion device was pulled up the shaft and again.
There is a problem that the work efficiency is low because it needs to be lowered into the shaft.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an automatic pipe supply/recovery device that automatically supplies or collects pipes with a propulsion device placed in a shaft. .

[Means for solving problems]

In order to achieve the above-mentioned object, the automatic pipe supply/recovery device according to the present invention supplies a pipe to a pipe propulsion device that pushes the pipe underground, and also provides an automatic pipe supply/recovery device that collects the pipe from the propulsion device. In the supply/recovery device, there is a tube elevating section in which tube receiving sections are provided at predetermined intervals on a chain that goes around the post via sprockets at the upper and lower ends of the post, and a tube elevating section at a lower position of the tube elevating section. It is characterized by comprising a tube conveying section that transfers the tube between the delivery position and the axial position of the spindle of the propulsion device.

[Effect]

When drilling a horizontal hole, first, a well-known propulsion device is remotely operated on the ground to push the pipe into the ground, and then the hydraulic chuck of the propulsion device reverses and retreats the attached parent rod, and the screw-connected Separate the tube and parent rod. Furthermore, the parent rod is retracted until there is a gap between this tube and the parent rod that allows a new tube to be set. Next, operate the automatic tube supply/recovery device to lower a new tube. The descent of the tube is stopped at a position where the clamp provided on the arm of the tube conveyor can grip this propelling tube. Next, by gripping the tube stopped at this position with a clamp and rotating the arm, the tube is set between the tube that has been pushed underground and the parent rod of the propulsion device. Finally, by rotating the parent rod forward and moving it forward, the tube that was pushed underground, the new tube, and the parent rod are integrally connected, and the new tube is pushed underground.

When recovering the tube, the main rod of the propulsion device is first removed from the hydraulic chuck, and the pushed tube is gripped by the hydraulic chuck. By rotating this hydraulic chuck forward and backward, the pipe is pulled out of the ground. The withdrawn tube is separated from the tube that is still buried. Next, the clamp on the arm of the tube transport section rotates the arm to a position where it can grip the pulled tube. The tube held in the clamp is
By rotating the arm in the direction of the rotating section, the arm is supported by the receiving section. Next, by raising the chain by the rotational drive source of the tube elevating section, the tube supported by the receiving section is lifted and transported onto the shaft.

As described above, the automatic pipe supply/recovery device according to the present invention can automatically supply/recover pipes without raising the propulsion device above the shaft. Thereby, it is possible to improve work efficiency.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the automatic pipe supply/recovery device according to the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2 show an automatic pipe supply/recovery device according to the present invention. The propulsion device 29 is
It has a base 64, a feed 54 that moves along the base 64, and a hydraulic chuck 80 disposed on the feed 54. Further, the propulsion device 29 includes a parent rod 68 fastened to a hydraulic chuck 80, a spindle 82, a water swivel 78 attached to the spindle 82, and a hydraulic holder 70 provided at the end of the base 64. Further, a pump 76 that sends high-pressure water onto the shaft through a water swivel 78 is arranged near the tank 74.
Further, a tube deflection measuring device 84 consisting of a theodolite and a camera is disposed behind the propulsion device 29, and a monitor 86 connected to the deflection measuring device 84 by a cable is disposed above the shaft.

As a result, the propulsion device 29 can advance the feed 54 and rotate the parent rod 68 in the normal direction by normal rotation of the spindle 82, thereby pushing the pipe underground. Further, after the excavation is completed, the chuck 80 tightens the pipe that has been pushed underground, and by rotating the chuck 80 in the normal direction and retracting the feed 54, the pipe that has been pushed underground can be pulled out.

Moreover, the automatic pipe supply/recovery device 10 of the present invention
is roughly divided into a tube lifting section 6 and a tube conveying section 8. First, the elevating section 6 will be explained.
has a pair of rotatable shafts 14, 14 arranged in parallel above and below the post 12. The shaft 14 is connected so that the rotation of the motor 15 is transmitted to the shaft 14. Four sprockets 16 are mounted at opposite ends of the pair of shafts 14, 14 at right angles to the axis of the shafts.
As shown in Figure 1, the right sprocket 16,
An endless chain 18 is stretched between the sprockets 16 and 16, and a chain 18 is also stretched between the sprockets 16 and 16 on the left side. The two chains 18, 18 have pipe 2
A plurality of receiving portions 22 supporting 0 are attached via hinges 24 at predetermined intervals.

As a result, as shown in FIG. 2, when the sprocket 16 is rotated counterclockwise, the chain 1
8, the receiving portion 22 descends. Sprocket 1
6 is rotated clockwise, the receiving portion 22 rises together with the chain 18.

Further, the receiving portion 22 is attached to the chain 18 via a hinge 24. Thereby, when the receiving part 22 is located in the propulsion device, the recessed part of the receiving part 22 faces upward. Further, when the receiving portion 22 is located on the opposite side, the hinge 24 is folded toward the post 12 due to the weight of the receiving portion 22.

Also, as shown in Figure 1, the left chain 18
A rod 50 is attached to the lower part of the receiving part 22 attached to the
Attach one end of the plate 52 to the other end.
Attach. By bringing one end of the tube 20 into contact with the plate 52, when the tube 20 is supported on the bracket 22, it can be supported in an accurate position, and the automatic tube feeding device 10 can be arranged at an angle. At this time, the tube 20 is prevented from falling.

Next, the transport section 8 will be explained. 2nd, 3rd,
As shown in FIG. 4, the lower end of the arm 26 of the transport section 8 is pivotally supported at the lower part of the propulsion device 29 via a pin 28. The cylinder 32 that rotates the arm 26 has a cylinder portion pivoted to the arm 26 via a pin 34 and a rod portion pivoted to the propulsion device 29 via the pin 36.
6 and the side of the propulsion device 29.
A stopper 72 is provided at the center of the arm 26. As a result, the arm 26 is rotated about the pin 28, and the tube 20 is placed coaxially with the parent rod 68 at a position where the stopper 72 and the side of the propulsion device 29 interfere. A clamp 30 for gripping the tube 20 is provided at the upper end of the arm 26.
The clamp 30 is composed of a fixed claw 38 and a rotating claw 40. The rotating pawl 40 is pivotally supported on the upper end of the arm 26 by a pin 42. The cylinder 44 that rotates the rotating claw 40 has a cylinder portion with a pin 46.
The rod portion is attached to the arm 26 and the rotating pawl 40 by being pivotally supported to the rotating pawl 40 by a pin 48. As a result, the rotating claw 40 is rotated about the pin 42 as a fulcrum.

Further, a sensor (not shown) is provided in the elevating section 6 of the automatic propulsion tube feeding device 10. This sensor indicates the position of the receiving part 22 where the tube 20 can be gripped by the clamp 30, that is, the position of the clamp 30 where the pipe 20 can be moved to the receiving part 22. Furthermore, four limit switches 56, 58, 60, 6 detect the proper position of the feed 54 of the propulsion device 29.
2 is attached to the base 64 of the propulsion device 29. The feed 54 has a limit switch 56,
A protrusion 66 is provided for actuating 58, 60, 62. The limit switch 56 indicates the end of pushing the propulsion tube 20 underground, and the limit switch 58 indicates the position where the buried tube 20 and the parent rod 68 of the propulsion device 29 have been separated. Further, the limit switch 60 indicates the position where the tube 20 and the parent rod 68 are connected, and the limit switch 62 indicates the position where the feed 54 has finished retracting.

The operation of the automatic pipe supply/recovery apparatus according to the present invention constructed as described above will be explained with reference to the flowcharts of FIGS. 5 and 6.

During excavation, first, the propulsion device 29 is operated to push the pipe 20A connected to the parent rod 68 until the limit switch 56 is activated, and the rear end of the pipe 20A is tightened with the hydraulic holder 70.

Next, as shown in the flowchart of Figure 5,
When the spindle 82 is reversed and the feed 54 is retracted (88) until the limit switch 58 is activated, the connection between the tube 20A and the parent rod 68 is disconnected (90). At this position,
Rotation of the spindle 80 is stopped (92). Furthermore,
When the feed 54 is retracted (94) and the limit switch 62 is activated (96), the retraction of the feed 54 is completed (98). Next, operate the tube lifting section 6 of the automatic tube supply/recovery device 10, and
2, 22 is lowered (100), and when a sensor (not shown) is activated (100),
02), the descent of the tube 20B is stopped (104). This tube 20B is gripped by the clamp 30 provided at the upper end of the arm 26 by operating the tube conveying section 8 (106). The clamp 30 is attached to the arm 26
is moved in the direction of the propulsion device 29 by the rotation of , and is set at a predetermined position by the stopper 72 (10
8). This places the tube 20B coaxially with the parent rod 68. Next, the spindle 80 is rotated in the normal direction, and the feed 54 is turned on by the limit switch 6.
The tubes 20A, 2 are moved forward 110 until the
0B and parent rod 68 are connected (112).
After this connection, the rotating claw 40 of the clamp 30 is opened to release the grip on the tube 20B (114). Clamp 3
0 is repositioned by the rotation of the arm 26 to a position where it grips a new tube 20 supported by the receiving parts 22, 22 of the automatic supply/recovery device 10 (11
6). Next, the pump 76 is activated (118), and the pipe 20 is pumped from the tank 74 through the water swivel 78.
Water is sent to A and 20B. Next, the hydraulic holder 70
to release the tightening of the pipe 20A (120),
The parent rod 68 is rotated forward and the feed 54 is advanced to start excavation (122). When the limit switch 56 is activated, the excavation is terminated (12
4) Stop advancing the feed 54 (126).
This ends the feeding of the tube 20B and also stops the rotation of the spindle 82 (128). at the same time,
The operation of the pump 76 is stopped (130), and the pipe 20B is tightened with the hydraulic holder 70 (132). A horizontal hole is excavated by sequentially repeating the above steps.

To recover the pipes that have been pushed underground, the propulsion device 29 is operated and the feed 54 is operated to push the last pipe 20.
Move forward and stop at the collection start position. The tube 20 and parent rod 68 are then separated and stopped by retracting the spindle 82. In this state, open the hydraulic chuck 80 and remove the water swivel 78 and the parent rod 68 from the hydraulic chuck 80. The preparation for collection is now complete. For recovery, as shown in the flowchart of FIG. 6, the propulsion device 29 is operated to advance the field 54 until the limit switch 56 is activated and then stopped. Next, the rear end of the tube 20 is tightened with the hydraulic chuck 80 (140), and the tightening of the rod holder 70 is released (142).
Next, the spindle 82 is rotated forward and the feed 54 is moved backward (144). When a first limit switch (not shown) is activated (146),
The backward movement of the feed 54 is stopped (148), and the normal rotation of the spindle 82 is stopped (150). The first limit switch indicates the position at which the disconnection operation between the pulled out pipe and the buried pipe immediately before it starts. Next, the buried pipe is tightened with the hydraulic holder 70 (152), the spindle 82 is reversed, and the feed 54 is retracted until a second limit switch (not shown) is activated (154). A second limit switch indicates the location where the extracted tube and the buried tube are cut out (156). At this position, the retraction of the feed 54 is stopped (158), and further the reversal of the spindle 82 is stopped (160). Next, by operating the tube conveying section 8, the arm 26 is set (162), and the blown tube is gripped with the empty clamp 30 (164). The hydraulic chuck 80 is then released from the tightening of the withdrawn tube (166) and the feed 54 is retracted until the hydraulic chuck 80 is disengaged from the propulsion tube (168).
At this time, a third limit switch (not shown) is activated. When the feed 54 has retreated to this position (170), the feed 54 is stopped (170).
2), move the tube held by the clamp 30 to the arm 26
By the rotation of (174), the tube is placed on the receiving part 22 of the elevating part 6, and the rotating claw 40 is rotated to release the grip on the tube (174).
76) Finally, by operating the tube lifting section 6, the tube 20 is raised (180) and the tube 20 is conveyed onto the shaft. At this position, a sensor (not shown) is activated to stop the tube 20 from rising (184).

In this way, the automatic pipe supply/recovery device 10 of the present invention can automatically supply or collect the pipes 20 while the propulsion device 29 is placed in the shaft 11.

〔Effect of the invention〕

As explained above, according to the automatic tube supply/recovery device according to the present invention, the tube can be automatically supplied to the propulsion device from above the shaft while the propulsion device is placed in the shaft. Furthermore, after the horizontal hole excavation is completed, the buried pipe can be automatically recovered. Thereby, the working efficiency of horizontal hole excavation can be improved.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the automatic pipe supply/recovery device according to the present invention arranged in a shaft together with the propulsion device, and Fig. 2 shows the automatic pipe supply/recovery device according to the present invention together with the propulsion device. Figure 3 is a front view of the clamp and arm of the automatic pipe supply/recovery device, Figure 4 is a side view of the clamp and arm of the automatic pipe supply/recovery device, FIG. 5 is a flowchart of the automatic pipe supply/recovery device during excavation, and FIG. 6 is a flowchart of the automatic pipe supply/recovery device during pipe recovery. 6... Pipe lifting section, 8... Pipe conveying section, 10...
...Automatic pipe supply/recovery device, 12...Post, 1
6...Sprocket, 18...Chain, 22...
...Receiving part.

Claims (1)

[Scope of Claims] 1. It has a feed that is movable along a base disposed in a vertical hole, and by the movement of the feed, a pipe placed at a pushing/extracting position is pushed underground or a propulsion device that can be pulled out from the shaft, and a post that is installed upright in the vertical hole, and a chain that goes around the post via a sprocket that is pivotally supported at the upper and lower ends of the post, and a pipe receiving portion that is placed at a predetermined interval in the chain that goes around the post. is provided with a lifting device that can stop the receiving portion at a pipe delivery position; and a lifting device that is pivotally connected to the base of the propulsion device to move between the delivery position of the lifting device and the pushing/extraction position of the propulsion device. A movable conveying device, which supplies the pipe received from the lifting device at the delivery position to the pushing/extracting position of the propulsion device, or the pipe pulled out from underground at the pushing/extracting position of the propulsion device. An automatic pipe supply/recovery device comprising: a transfer device that receives and collects the pipes to a receiving portion of the lifting device at the delivery position.