JPH01239295A - Puncher type pipe propelling device - Google Patents

Abstract

PURPOSE:To facilitate control of direction by forming an excavating part in its rear part into a cone shape while providing one protrusion in the point end internal part of a propulsive pipe, following the excavating part, and pressing the cone-shaped rear part so as to change the direction of excavation. CONSTITUTION:The title device is constituted of an excavating part 31, direction correcting part 73, following part 75 transmitting thrust of a jack 55 to the excavating part 31 and a main pressing part or the like pressing the following part 75 to be rotated. While the excavating part 31, in its inside, contains a puncher 39 and opens a supply air port 41, and the correcting part 73 arranges a protrusion member 49 adapted to a cone-shaped part 45. Compressed air is fed from the supply air port 41, propelling the puncher 39, when a direction is changed, a succeeding pipe rotary device 53 rotates a succeeding pipe 51 and the member 49 in a direction desired to be corrected, and pressing it to the cone-shaped part 45 by the jack 55, a course is changed. Accordingly, control of direction can be facilitated.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is capable of burying pipes such as communication pipes, water pipes, gas pipes, etc. underground using a trenchless construction method without excavating the ground surface. The present invention relates to a puncher-type tube propulsion device having a thrust direction adjustment mechanism.

(Prior art) In general, when burying pipes such as communication pipes, sewage pipes, gas pipes, etc., an excavated trench is formed on the ground surface, the pipes are housed in the excavated trench, and then the pipes are placed in the excavated trench. This is done using the cut-and-cover method in which backfilling soil is put in and backfilling, but recently some construction projects have begun to bury pipes underground without excavating the ground.
A trenchless construction method is used in which pipes are inserted directly into the ground from a shaft.

FIG. 5 shows an example of a tube propulsion device used in such a trenchless construction method. This tube propulsion device includes a front head 11, a drive section 13 arranged behind the front head 11, and When the front head 11 is moved by a predetermined stroke S by the driving device 15 in the driving section 13, the piping 17 connected to the rear end of the driving section 13 is moved as shown in FIG. , by pressing with a jack from the shaft side (not shown), the pipe 17 is moved by a predetermined stroke, and by repeating this,
Piping 17 is buried underground.

In this pipe propulsion device, when changing the traveling direction of the pipe 17, as shown in FIG.
9, the front head 11 is moved by a predetermined stroke S in the direction shown by the arrow in FIG. 8, and the direction of movement of the pipe 17 is changed.

However, as shown in FIG. 9, in a tube propulsion device that has a puncher cylinder 23 and a puncher 25 for propelling the excavation part 21 inside the excavation part 21, the puncher 25 is fed inside the puncher cylinder 23. The excavating part 21 is moved by the compressed air supplied from the air hole 27, and the excavating part 21 obtains the propulsive force by the impact force when the puncher 25 collides with the inner surface of the puncher cylinder 23, so that the tube is propelled as shown in FIG. It is difficult to arrange members such as the front hen Fl1 in front of the excavation part 21 as in the conventional puncher-type tube propulsion device, and therefore, conventionally, a direction control function has not been added to this type of puncher-type tube propulsion device. However, there was a drawback that the direction of travel of the conduit could not be changed.

(Problems to be Solved by the Invention) The present invention has been made in view of the drawbacks listed in L. The purpose is to provide pipe propulsion equipment.

(Means for Solving the Problems) In the puncher type tube propulsion device of the present invention, the rear part of the excavation part is formed into a conical shape, and a protrusion is provided inside the tip of the propulsion tube that follows the excavation part. and the excavation part and the propulsion pipe are
They are configured to be connected by flexible tubes.

(Function) In the puncher-type tube propulsion device of the present invention, one protrusion provided inside the tip of the propulsion tube that follows the excavation part is pressed against the conical rear part of the excavation part. , the direction of the excavation part with respect to the direction of the propulsion tube, that is, the direction of the tip excavation part, is changed, and the tip excavation part changes course in that direction.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the puncher-type tube propulsion device of the present invention. The main part is composed of a direction correcting part 73 for correcting the traveling direction of the excavator, a trailing part 75 for transmitting the thrust of the jack 55 to the excavating part 31, and a base pushing part 77 for rotating and pressing the trailing part 75.

FIG. 2 is a (yellow sectional view) taken along line I'm-A' in FIG.

The excavating part 31 has a tip end 35 having an acute angle shape with a tapered end, and has a ring 36 for overburdening the earth pile on the outside, and a puncher cylinder 37 inside. A puncher 39 is accommodated in this puncher cylinder 37, and an air supply hole 41 for supplying compressed air is opened therein.

The direction correction part 73 is arranged at the rear end of the excavation part 31 and includes a propulsion tube 47 and a conical part 45 in which a tapered conical part 45 and a projection member 49 that contacts the conical part 45 are arranged in the inner circumferential direction. The main portion is constituted by a flexible tube 43 that covers a propulsion tube 47 together.

Note that the conical portion 45 and the propulsion tube 47 are separated, and the subsequent portion after the propulsion tube 47 is configured to be less affected by the impact force necessary for excavating the tip. The trailing portion 75 is composed of trailing pipes 51 that are continuously connected.

Note that the rear end of the trailing pipe 51 is connected to the original push part 7 installed in the shaft 83.
7 is pressed by the jack 55.

The main part of the original pushing part 77 is constituted by the trailing tube rotating device 53 and the jack 55.

In the tube propulsion device configured as described above, the direction correction unit 7
When the relative angle is changed by θ using the propulsion tube 47 of No. 3,
As shown in the figure, the excavation section 31 changes course from the direction a of the trailing pipe 51 to the direction of the excavation section 31.

Note that FIG. 4 is a cross-sectional view taken along line BB' in FIG. 3.

That is, by rotating the trailing tube 51 by the trailing tube rotation device 53, the projection member 49 disposed on the propulsion tube 47 is rotated in the circumferential direction to the desired direction, and then the projection member 4
9 to the tapered surface 46 of the conical portion 45 by jacking 55.
As shown in FIG.
It makes a rotational movement by θ within the range of the overcut width 33 in the direction of d with the center of rotation as the center of rotation, and changes its course.

In the tube propulsion device configured as described above, the trailing tube rotation device 53 rotates the protrusion member 49 to the desired direction, and the jack 55 presses the protrusion member 49 against the tapered surface 46 of the conical portion 45. By doing so, the course is changed toward the direction of the protruding member 49, so that the traveling direction of the excavating section 31 can be easily controlled from the rear of the excavating section 31.

(Effects of the Invention) As explained above, according to the present invention, in the puncher type tube propulsion device, the rear part of the excavation part is formed into a conical shape, and one part is provided inside the tip of the propulsion tube following the excavation part. Since the excavation part and the propulsion tube are connected by a flexible tube, the direction of the puncher-type tube propulsion device can be easily controlled from the rear of the tube propulsion device. It has the advantage of being able to

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the tube propulsion device of the present invention, FIG. 2 is a cross-sectional view taken along line A-A' in FIG. 1, and FIG. 3 is a direction of the tube propulsion device in FIG. 1. FIG. 4 is a cross-sectional view taken along line BB' in FIG. 3, and FIGS. 5 to 9 are explanatory diagrams of the operation of the conventional tube propulsion device. 31... Excavation part 37... Cylinder for puncher 43... Flexible tube 45... Cone shaped part 46... Tapered surface 47... Propulsion tube 4
9...Protrusion member 51...Subsequent pipe 53...
・Following tube rotation device 55... Jacket 73... Direction correction part

Claims (1)

[Claims] 1. A puncher-type tube propulsion device that uses compressed air to collide a puncher in a puncher cylinder of an excavation part with the tip thereof and propels it by the impact force, in which the rear part of the excavation part is shaped like a cone, and the excavation part A puncher-type tube propulsion device characterized in that a propulsive tube that follows the puncher has one protrusion inside the tip thereof, and the excavation part and the propulsion tube are connected by a flexible tube.