JPH06229191A - Non-drive excavator - Google Patents

Abstract

PURPOSE:To enable rectilinear propagation and curved propagation by self- advancing without requiring thrust from a starting shaft. CONSTITUTION:In a non-drive excavator having a cutting drill 1a at a front end and a traction section 2 for an article to be laid at a rear end, reaction generating sections 3, 5 at two places are installed between the cutting drill 1a and the traction section 2. An expansion and contraction mechanism 4 in the longitudinal direction is interposed between these reaction generating sections 3, 5. Flexing mechanisms 6 are further interposed between the cutting drill 1a and the traction section 2, and a built-in starting coil 1c is mounted at the front end section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-digging machine for use in laying flexible underground structures such as cables and polyethylene pipes.

[0002]

2. Description of the Related Art Conventionally, as an excavator used for burying a gas pipe, a sewer pipe, a cable, etc. underground without excavating, a hydraulic jack device which maintains straightness and is installed in a starting shaft. It is common to use the original thrust force by. The purpose of maintaining straightness in conventional excavators is to use the rigidity of the pipe connected to the excavator to transmit the original thrust to the tip of the excavator. It is not possible to transmit to the tip of.

[0003]

However, in the excavator utilizing the thrust force by the hydraulic jack device installed in the starting shaft as described above, the existing structure is placed on the extension line (straight line) to be excavated. However, there was a problem that construction would be difficult if the survey was omitted during the preliminary survey or unexpected obstacles such as new ones were created after the survey.

The present invention has been made in view of the problems of the conventional excavator, and it is possible to move by itself without the need for a pushing thrust, and when an unexpected obstacle appears. It is an object of the present invention to provide an excavator that can be bent to avoid obstacles, and that can continue excavation while detecting the position of the excavator itself and can be excavated to a target position.

[0005]

In order to achieve the above-mentioned object, the excavator of the present invention is a non-excavation excavator having a cutting drill at the tip and an index portion of the laid object at the rear end. At least two places between the cutting drill and index part,
A reaction force support portion is provided, and a longitudinal expansion / contraction mechanism is provided between these reaction force support portions.
Further, a bending mechanism is provided between the cutting drill and the index portion, and a position detecting starter is provided at the tip portion.

[0006]

In the excavator of the present invention having the above-described structure, first, the rear reaction force support portion is acted, then the expansion mechanism is extended to push out the front half portion, and then the front reaction force support portion is acted. After that, the retractable mechanism is moved in and out, and the operation of indexing the latter half is repeated to move the robot by itself.

Further, during the movement, it is possible to move forward by operating a bending mechanism. Further, the position of the excavator can be detected by the output signal from the position detecting starter.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A non-digging machine according to the present invention will be described below with reference to an embodiment shown in the accompanying drawings. 1 is a drawing for explaining the outline of the overall configuration of a non-excavation machine according to the present invention, FIG. 2 is a diagram showing an example of the configuration of a reaction force supporting portion, and FIG. 3 is a diagram showing an example of the configuration of a bending mechanism. 4, FIG. 4 is a cross-sectional view of a reaction force support portion, FIG. 5 is a cross-sectional view of a bending mechanism, FIG. 6 is a diagram for sequentially explaining a straight traveling method of a non-excavation machine of the present invention, and FIG. 7 is a non-excavation of the present invention. It is a figure which explains the turn-around method of an excavator in order.

In the drawings, reference numeral 1 denotes an excavation portion located at the tip of the excavator, which comprises a cutting drill 1a, a built-in hydraulic motor 1b for rotating the cutting drill 1a, and a built-in oscillation coil 1c which is a position detecting oscillator. Has been done. Reference numeral 2 is an index portion of an object to be laid, such as a cable, located at the rear end portion of the excavator, and an appropriate number of intermediate portions are connected between the excavation portion 1 and the index portion 2.

In this embodiment, as the intermediate portion, the first reaction force support portion 3, the expansion / contraction mechanism portion 4 such as a cylinder device, and the second reaction force support portion 5 are respectively provided from the front end side. It shows the one connected through the bending mechanism 6. By the way, as shown in FIG. 4, the first and second reaction force supporting portions 3.5 are respectively outriggers 3a and 5a arranged at, for example, four equal positions on the outer peripheral side, and as shown in FIGS. In addition, it is composed of cylinder devices 3b and 5b for expanding them so as to have an appropriate angle with the outer shell, and for example hydraulic control solenoid valves 3c and 5c which are supplied to these cylinder devices 3b and 5b.

Further, the bending mechanism 6 is, as shown in FIG.
Cylinder device 6 arranged at, for example, four equal positions on the outer peripheral side
a, a ball joint 6b installed in the center, and an outer shell bellows 6c that covers them.

The non-excavation machine according to the present invention is constructed as described above, and the case of going straight next is shown in FIGS.
A description will be given based on (f). First, in the soil, the rods of all the cylinder devices 5b of the second reaction force supporting portion 5 are moved out to expand the outriggers 5a to give a digging reaction force [(a) figure]. Then, the expansion / contraction mechanism section 4 is extended while the excavation reaction force is held, and the excavation section 1 is pushed forward [Fig. (B)].

When the excavation part 1 is pushed forward, the rod of the cylinder device 5b is retracted to close the outrigger 5a [Fig. (C)], and then all the cylinder devices 3b of the first reaction force support part 3 are moved. The outrigger 3a is expanded by operating the rod of (1) to give the excavation reaction force [Fig. (D)]. Then, the expansion / contraction mechanism section 4 is retracted while the excavation reaction force is held, and the index section 2 is pulled forward [(e) figure]. Then, the rod of the cylinder device 3b is retracted to move the outrigger 3a. Is closed [Fig. (F)]. It is possible to go straight by repeating the above operation. In this case, the soil is not discharged, but goes straight while penetrating (consolidating), but in some cases (when the diameter is large), a mechanism for discharging the soil may be mounted.

Next, a case where the non-excavation machine according to the present invention is bent forward will be described with reference to FIGS. 7 (a) to 7 (h). First,
When the excavation unit 1 reaches a point where the excavation unit 1 wants to bend, all rods of the cylinder devices 5b of the second reaction force support unit 5 are moved out in the soil to expand the outriggers 5a and provide the excavation reaction force. [Figure (a)].

Then, the rod of the required cylinder device 6a among the four cylinder devices 6a in the bending mechanism 6 on the tip side is moved out in addition to or in addition to this so that the excavation portion 1 is directed in the direction in which the bending movement is desired. The retractable mechanism section 4 is extended while the rod of the cylinder device 6a facing the cylinder device 6a that has ejected the rod is retracted. This allows
The excavation portion 1 is pushed forward while rotating around the ball joint 6b [Fig. (B)].

Next, the rods of the cylinder device 5b are retracted to close the outriggers 5a [(c) figure], and then all the rods of the cylinder devices 3b of the first reaction force supporting portion 3 are moved out. The outrigger 3a is expanded to give a reaction force for excavation [Fig. (D)]. Then, the expansion / contraction mechanism section 4 is retracted while the excavation reaction force is held, and the index section 2 is pulled forward [(e) figure]. Then, the rod of the cylinder device 3b is retracted to move the outrigger 3a. Close [(f)
Figure].

While repeating the above operation, when it is confirmed by the output signal of the built-in oscillation coil 1c that the next bending mechanism 6 has moved to the point where the bending mechanism 6 on the tip side is bent, The bending mechanism 6 is operated as described above [Fig. (G)]. By repeating such an operation up to the bending mechanism 6 at the rearmost portion, it is possible to move forward [(h)
Figure]. Also in this case, the soil is not discharged, and the vehicle goes straight while penetrating (consolidating), but in some cases, a mechanism for discharging the soil may be mounted.

When it is confirmed by the output signal from the built-in oscillation coil 1c that the bending angle θ of the excavator has reached a predetermined angle by the above operation, the rod of the cylinder device 6a of each bending mechanism 6 is ejected. Retract and return from the bend to the original direction.

[0019]

As explained above, since the non-excavation machine of the present invention is of self-propelled type, after the machine is excavated and buried in the soil from the starting shaft, the original thrust device is installed in the starting shaft. It becomes unnecessary, and the space and structure of the vertical shaft is improved to the minimum. Further, since it is not necessary to transmit the axial force to the object to be laid at the rear end of the excavator, a flexible material can be laid. Furthermore, since the excavator itself can move forward, it is possible to avoid obstacles and to correct the position in a predetermined direction.

In the present embodiment, four outriggers are arranged, but two outriggers may be arranged as long as the required earth pressure resistance is generated. Also,
In this embodiment, three bending mechanisms 6 are arranged, but at least one bending mechanism 6 is required. However, it goes without saying that the radius of curvature in the case of curving is reduced by arranging as in this embodiment.

Although not described in this embodiment, spraying or injecting a solution or the like into the natural ground may be used together for the purpose of facilitating cutting and holding the cutting surface. . Further, in the reaction force support portion or the expansion / contraction portion, in order to prevent the soil (sand) from being caught (to be caught), it may be covered with, for example, a metal, a synthetic resin or the like in order to eliminate a gap.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an outline of an entire configuration of a non-digging machine according to the present invention.

FIG. 2 is a diagram showing an example of a configuration of a reaction force support portion.

FIG. 3 is a drawing showing an example of a configuration of a bending mechanism.

FIG. 4 is a cross-sectional view of a reaction force support portion.

FIG. 5 is a cross-sectional view of a bending mechanism.

FIG. 6 is a view for sequentially explaining a straight-ahead method of the non-excavation machine according to the present invention.

FIG. 7 is a diagram for sequentially explaining a curving method of the non-digging machine according to the present invention.

[Explanation of symbols]

 1a Cutting drill 1c Built-in oscillation coil 2 Index part 3 1st reaction force support part 4 Expansion-contraction mechanism part 5 2nd reaction force support part 6 Bending mechanism

Front page continuation (72) Inventor Takashi Tanahashi 4-533 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd. (72) Inventor Satoshi Ohsumi 4-53, Kitahama, Chuo-ku, Osaka City, Osaka Prefecture No. Sumitomo Metal Industries, Ltd.

Claims (3)

[Claims] 1. A non-excavation machine having a cutting drill at the tip and an index portion of an object to be laid at the rear end, and at least two reaction force supporting portions are provided between the cutting drill and the index portion. A non-excavation machine having a longitudinal expansion / contraction mechanism interposed between these reaction force supporting portions. 2. The non-excavation machine according to claim 1, further comprising a bending mechanism provided between the cutting drill and the index portion. 3. The non-digging excavator according to claim 1, wherein a starter for position detection is provided at the tip portion.