JPH0233839B2 - SUISHINKOHONOHENIKYOSEISOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a leading pipe equipped with a shoe at the front end of a pipe to be inserted into the ground, such as a humid pipe, an electric wire, a steel pipe for buried telephone lines, or a water pipe. The present invention relates to a displacement correction device using a propulsion method in which an auger is disposed in the pipe, and the auger removes dirt and stones while pushing the pipe forward.

In the propulsion method, the pipe may deviate from a predetermined propulsion direction, and in order to correct this deviation, the following deviation correction devices have been proposed.

In other words, a plurality of hydraulic cylinders are arranged in the circumferential direction to swing the shoe with respect to the leading pipe provided at the front end of the pipe, and when deviation occurs, the deflection is to swing the shoe in a direction to cancel the deviation. Special request for orthodontic device
It has been filed as No. 55-16186 (Japanese Unexamined Patent Publication No. 56-115497). However, this deviation correction device had the following problems.

Since a cylinder for correcting deviation is installed at the front of the pipe and presses it in the radial direction, the cylinder is limited and correction of deviation is impossible due to the condition of the strata.

For example, four hydraulic cylinders are provided, and even if it is possible to oscillate the shoe in the direction in which the hydraulic cylinders are arranged, it is not easy to oscillate in the direction between the hydraulic cylinders.

The present invention was devised to solve these conventional problems, and an object of the present invention is to provide a propulsion method-based deviation correction device that can easily and reliably correct deviations in all geological strata.

The deviation correction device according to the present invention connects the shoe to the leading pipe so that it can move forward and backward within a predetermined range and swing in all directions, and there is a cylindrical shape between the leading pipe and the pipe in which the auger is disposed. An inner tube is provided, and the front end surface of this inner tube is an inclined surface inclined with respect to the rear end surface of the shoe, and is opposed to the rear end surface of the shoe, and the inner tube is appropriately rotated by a drive device when correcting deviation. so that the tip of the inclined surface is inclined toward the deflection direction, and by pushing the inner pipe inclined surface, it comes into contact with the rear end surface of the shoe, and with the shoe tilted opposite to the deflection direction. Both the leading pipe and the propulsion pipe are pushed in, and the deviation is corrected by the reaction force of the ground.

Next, an embodiment of the deviation correction device according to the present invention will be described based on the drawings.

In FIG. 1, a cylindrical leading pipe 2 is fixed to the front end of a pipe 1 to be inserted into the ground.
An annular shoe 3 is supported by. A flange 4 projecting inward is provided at the front end of the leading tube 2, and the rear portion of the shoe 3 is surrounded by the leading tube 2. A spherical surface 5 is formed in a portion of the shoe 3 that faces the inner circumferential surface of the flange 4, and this spherical surface 5 contacts the inner surface of the flange 4, thereby allowing the shoe 3 to swing. Show 3
A flange 6 projecting outward is provided at the rear end, and this flange 6 faces the flange 4. A spring receiving hole 7 that opens toward the flange 4 is bored in the flange 6, and a compression coil spring 8 is accommodated in the spring receiving hole 7. The spring 8 abuts against the bottom surface of the spring receiving hole 7 and the rear surface of the flange 4, thereby biasing the shoe 3 rearward with respect to the leading pipe 2. A tapered surface 9 that becomes smaller in diameter toward the rear is formed on the outer periphery of the rear end of the flange 6.
The leading pipe 2 is formed with a flat surface that contacts the rear end surface of the flange 6 and a tapered surface 10 that contacts the tapered surface 9 . Therefore, when propelling tube 1,
The flat surface and tapered surface 10 of the leading tube 2 come into contact with the shoe 3 and can push the shoe 3 while preventing the shoe 3 from swinging. When the rear end surface of the shoe 3 is in contact with the leading pipe 2, a gap D is provided between the flanges 4 and 6, and the shoe 3 can move forward and backward with respect to the leading pipe 2 within the range of this gap D. An inner tube 11 is inserted inside the leading tube 2, and the front surface of the inner tube 11 has an inclined surface 1 that is inclined with respect to the rear end surface of the shoe 3.
It is said to be 2. A sleeve 13 made of an elastic material such as rubber is fitted on the inner periphery of the rear part of the shoe 3, and this sleeve 13 extends to the inner surface of the front part of the inner tube 11. This prevents dirt and stones removed by an auger (not shown) from entering between the shoe 3 and the inner pipe 11. A sleeve 14 made of an elastic material such as rubber is also fitted around the front end of the shoe 3, and this sleeve 14 extends to the front end of the guide tube 2. This prevents dirt and stones from entering between the shoe 3 and the leading pipe 2. A ring 15 is arranged inside the sleeve 14, by which the sleeve 14 is supported against earth pressure from the outside.

The inner tube 11 is able to slide back and forth and rotate relative to the leading tube 2 and the tube 1. To facilitate this sliding, grease is applied between the front end of the inner tube 11 and the leading tube 2. is included. In order to prevent this grease from leaking, an O-ring 16 or the like is attached to the outer periphery of the inner tube 11 as a seal that contacts the inner surface of the leading tube 2.

In the state shown in FIG. 1, the inclined surface 12 of the inner tube 11 is spaced apart from the rear end surface of the flange 6, but when the inner tube 11 is advanced, the inclined surface 12 can be brought into contact with the rear end surface of the shoe 3. Show 3 by inclined surface 12
As the shoe 3 is pushed forward, the tapered surface 9 of the shoe 3 separates from the tapered surface 10 of the leading tube 2, allowing the shoe 3 to swing. The shoe 3 receives a reaction force from the ground from the front while being guided by the slope 12, and tilts in a direction along the slope 12. This allows deviation correction.

As shown in FIG. 2, at the rear end of the inner tube 11,
A sleeve 17 is fixed, and a plurality of protrusions 18 are arranged in the circumferential direction on the outer periphery of the sleeve 17. Hook the tool 19 onto this protrusion 18 and remove the sleeve 1.
By pushing in the circumferential direction of 7, the inner tube 11 can be rotated. Note that it goes without saying that the inner tube 11 can be rotated using other driving means such as a hydraulic cylinder without using the tool 19. A sleeve 20 is fixed to the rear end of the tube 1, and the sleeve 20 is pushed forward by a jack 21. sleeve 2
A jack 22 for pushing the sleeve 17 forward is fixed to the inner surface of the sleeve 20, and a plurality of through holes 23 for inserting the tool 19 are arranged in the circumferential direction of the sleeve 20.

The following steps will be taken when implementing the propulsion method.

(a) The shaft 25 of the auger 24 is hollow, and a light emitting element 26 is provided at the center of the front end of the shaft 25.
6 is detected by the light receiver 27 and displayed on the display meter 28, thereby detecting the deflection direction of the leading tube 2 (in the direction of arrow A). (Fig. 3) (b) Slope 1 forward in the direction of deflection of the leading pipe 2.
The inner tube 1 is moved by the driving means so that the inner tube 2 is tilted.
1 in the circumferential direction. (Fig. 4) (c) The inner tube 11 is advanced by the cylinder driving means, and the shoe 3 is pushed by the inclined surface 12. As a result, the shoe 3 swings in the direction opposite to A (in the direction of arrow B), and if the shoe 3 is moved forward together with the inner tube 11, the deviation is corrected.

Next, other embodiments shown in FIGS. 6 to 8 will be shown. In this embodiment, the inner tube 11 having the inclined surface 12 formed therein is driven by a hydraulic cylinder.
For this reason, in this embodiment, the inner tube 11 is composed of an inner tube main body 11A as a cylindrical body and a cylindrical swash plate 11B attached to the outer periphery of the distal end thereof. The inner tube main body 11A has a distal end built into a flange 6 which is the rear end of the shoe 3. On the other hand, the cylindrical swash plate 11B
is mounted so as to be rotatable and movable back and forth within the guide tube 2, and allows the inclined surface 12 at the tip to come into contact with the rear end surface of the flange 6. In addition, the inclined surface 12 of the shoe 3
In order to correct the excavation direction in accordance with . The cylindrical swash plate 11B includes a swash plate rotation piston 30 and a swash plate front and back piston 31 installed in a space between the inner tube main body 11A and the leading tube 2.
It is connected continuously to enable rotational movement and back-and-forth movement. The swash plate rotating piston 30 is connected to a pinion gear 32 having a ball screw mechanism at the rod end, and the pinion gear 32 meshes with a ring gear 33 provided on the cylindrical swash plate 11B. Therefore, the swash plate 11B rotates due to the reciprocating movement of the piston 30,
Change the position of the inclined surface 12. On the other hand, the piston 31 for moving the plate forward and backward is connected to a bracket 34 provided at the rear end of the swash plate 11B, so that it can be pushed and retracted.

As a result, in this embodiment, when the excavation direction deviates (Fig. 7 1), the swash plate 1
1B with the piston 30 (same 2), and the swash plate 1
The direction is corrected by continuing excavation while pushing 1B with the piston 31 (see 3 and 4).

FIG. 8 shows an overall configuration diagram with the above-mentioned configuration, where 35 is an auger rotation motor, 36 is a base,
37 is an earth removal case.

In this way, the deviation correction device according to the present invention
Since it can be swung in any direction (360 degrees), deviation correction can be performed easily and reliably.

As mentioned above, the straightening device according to the present invention connects the shoe to the leading pipe so that it can move forward and backward within a predetermined range and swing in all directions, and has a cylindrical shape between the pipe and the pipe in which the auger is disposed. Insert the inner tube of
The front end surface of the inner tube is made into an inclined surface that is inclined with respect to the rear end surface of the shoe, and is opposed to the rear end of the shoe, and when correcting deviation, the inner tube is appropriately rotated by a drive device to correct the deviation of the inclined surface. Since the inner tube is propelled forward with the shoe in contact with the rear end of the shoe, and the deviation is corrected by the reaction force of the ground, the deviation can be corrected easily and reliably. It has the excellent effect of being able to perform.

[Brief explanation of drawings]

FIG. 1 is an enlarged longitudinal sectional view showing an embodiment of the deviation correction device according to the present invention, FIG. 2 is a schematic enlarged longitudinal sectional view showing the driving means in the same embodiment, and FIGS. 3 to 5 are the same. Overall longitudinal sectional views sequentially showing the operation of the embodiment,
Fig. 6 is a sectional view of main parts of another embodiment, Fig. 7 1 to 4
8 is a sectional view showing a state of correcting deviation, and FIG. 8 is a side view of the entire propulsion device. 1...Pipe, 2...Leading pipe, 3...Show, 5...
... Spherical surface, 6 ... Flange, 11 ... Inner tube, 11A
... Inner tube body, 11B ... Cylindrical swash plate, 12 ... Inclined surface, 13, 14 ... Sleeve, 24 ... Auger, 26 ... Light emitting element, 27 ... Light receiver, 30 ...
...Rotating piston, 31... Forward piston, 3
2...Pinion gear, 33...Ring gear.

Claims (1)

[Scope of Claims] 1. A pipe comprising a leading pipe with a shoe at the tip, a propulsion pipe following the leading pipe, and a pipe in which an auger is disposed, and a pipe that is pressed by the auger while pressing the propulsion pipe. In the deviation correction device of the propulsion method, which inserts soil and stones into the ground while discharging it, the shoe is connected to the leading pipe so that it can move forward and backward within a predetermined range and can swing in all directions, A cylindrical inner tube is provided between them, the front end surface of this inner tube is an inclined surface inclined with respect to the rear end surface of the shoe, and is opposed to the rear end surface of the shoe, and the inner tube is rotated in the circumferential direction. and a propulsion method deviation correction device provided with a driving means for sliding in the axial direction.