JPH1047538A - Cable pipeline crushing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily crush a pipeline with a cable in a live wire condition inserted without providing a prepared hole by using a wedge member. SOLUTION: In a space between a cable insertion hole 12 and a cable 13 inserted in this hole, a protecting cylinder 1 is inserted, in its external surface, a wedge groove 8 is formed, in a tip end of an adapter 3 mounted in a hydraulic cylinder 2, a split member 4 fitted to the wedge groove 8 is mounted, in a wedge-shaped space 27 between the wedge groove 8 and the split member 4, a wedge member 5 mounted in a piston 24 of the cylinder 2 is forwardly advanced, so as to crush a pipeline 11 while protecting the cable 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for crushing a cable line, and more particularly to a device suitable for crushing a line (cable live line) into which a power cable in an energized state is inserted. is there.

[0002]

2. Description of the Related Art In the case of partially crushing a live cable line, a generally adopted method is to use a hand or a hammer to crush the cable, or to use a machine using an air-driven tool. It is fishing. The above hand hangers have a low work efficiency and cause a great deal of operator fatigue. Also, the machine is
There is a possibility that the protection pipe or the cable sheath inside the conduit may be damaged due to a wrong hand, and there is a problem that dust and noise are generated.

In order to solve these problems, a cable pipeline crushing device (Japanese Patent Application No. 8-96) previously filed by the present applicant as a patent has been filed.
No. 755), a pilot hole is provided in advance at the end face between the cable insertion holes at the end of the conduit, a pair of split members is inserted into the pilot hole, and a wedge member is pushed between the split members by a hydraulic cylinder. By doing
Crush the pipeline.

The above method is superior to the above-mentioned conventional method in terms of work efficiency, noiselessness, dustlessness, etc. However, since it is necessary to provide a pilot hole in the end face of the pipeline in advance, the work efficiency is low. There was a limit to improvement.

Accordingly, an object of the present invention is to make it possible to crush a pipeline without noise and without dust without providing a pilot hole as described above.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a protective tube which is inserted into a gap between an inner surface of a cable insertion hole and a cable inserted into the cable insertion hole. Forming a wedge groove, attaching an adapter to the tip of a cylinder driven by the pressure of fluid, attaching a split member fitted to the wedge groove to the tip of the adapter so as to be movable in the radial direction of the protection cylinder, A wedge-shaped member attached to the tip of the piston of the cylinder is fitted into a wedge-shaped space between the groove bottom of the wedge groove and the opposing surface of the split member, and the split member is attached to the protective cylinder as the wedge member advances. It is designed to push up higher than the outer peripheral surface.

The above-mentioned protection cylinder is constituted by a combination of a half-cylindrical upper protection cylinder half and a lower protection cylinder half, and a locking device is attached to an outer surface of a butt portion of the two protection cylinder halves. The two protection cylinder halves are detachably connected in a cylindrical shape, and the thickness of the protection cylinder is formed such that the surface of the lower protection cylinder half that contacts the cable insertion hole is the thinnest. It is possible to adopt a configuration in which the thickness is increased as the distance from the vehicle increases.

[0008]

In the cable conduit crushing apparatus having the above structure, when the piston and the wedge member attached thereto are advanced by supplying fluid pressure to the cylinder, the split member is pushed up by the wedge member and the split member is pushed up by the cable insertion hole. It exerts a pressing force on the inner surface and destroys the inner surface. The reaction force of the pressing force is received by the inner surface of the cable insertion hole which is in contact with the lower surface through the protective tube.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the crushing device of the embodiment includes a protection cylinder 1, a hydraulic cylinder 2, an adapter 3, a split member 4, and a wedge member 5.

The above-mentioned protective cylinder 1 is composed of a semi-cylindrical upper protective cylinder half 1a and a lower protective cylinder half 1b. When the both end faces are matched, a cylindrical protective cylinder having a constant inner diameter is formed. The cylinder 1 is configured.

In order to maintain the shape of the above-mentioned protective cylinder 1,
A pair of recesses 6 on both side surfaces of each protection cylinder half 1a, 1b,
6 ', 6a, 6a' are formed, and detachable locking members 7 are attached to these recesses. In addition, the protection cylinder half 1
On the upper surface of a, a wedge groove 8 is formed over the entire length in the longitudinal direction, and the groove bottom 9 of the wedge groove 8 has a constant taper angle, and the groove bottom 9 becomes deeper toward the mounting side of the adapter 3 described later. Has become.

As shown in FIG. 2, the outer diameter of the above-mentioned protective cylinder 1 is formed to have such a size that it can be inserted into a cable insertion hole 12 provided in a conduit 11 with a small fitting gap. Is formed larger than the outer diameter of the cable 13.

The bottom portion of the lower protective cylinder half 1b constituting the protective cylinder 1 is formed to have the thinnest wall thickness and to be gradually thicker toward both end surfaces. In addition, the thickness of both end surfaces of the upper protection cylinder half 1a is equal to the thickness of both end surfaces of the lower protection cylinder half 1b, and gradually increases from that portion to the upper surface. However, the upper surface is thinner by the depth of the wedge groove 8 described above.

Next, the hydraulic cylinder 2 has a threaded portion 14 formed on the outer peripheral surface of the distal end portion, and the threaded portion 14 is screwed into a threaded hole 16 provided in the rear end wall 15 of the adapter 3 (FIG. 1, FIG. (See FIG. 4).

The adapter 3 has a box shape with an open top, a screw hole 16 in the rear end wall 15 and a square hole 18 in the front end wall 17.
Is formed, and an engaging hole 19 communicating with the square hole 18 is formed on the upper surface of the front end wall 17. The front end wall 17
The upper end of the upper protection cylinder half 1a is provided with recesses 21, 21 at the lower ends on both sides thereof, and the above-mentioned recesses 21, 21 are engaged with the two bolts 22 erected on the end surface of the upper protection cylinder half 1a, thereby protecting the adapter 3 from the upper side. It is designed to be attached to the cylinder half 1a.

The adapter 3 has a square hole 1 at its front end.
The rear end of the wedge member 5 is inserted from 8. A pair of opposed engagement claws 23 are provided at the rear end of the wedge member 5, and the engagement claws 23 are engaged with engagement grooves 25 of a piston 24 protruding from the front end surface of the hydraulic cylinder 2.

The wedge member 5 is provided with the wedge groove 8.
And has a width that can be freely fitted in the wedge groove 8. Both upper and lower surfaces of the wedge member 5 are formed in a tapered shape having a constant wedge angle θ (see FIG. 4).

The rear end of the split member 4 laid on the upper surface of the wedge member 5 is inserted into the square hole 18.
An upwardly projecting piece 26 is provided on the upper surface of the rear end of the split member 4.
Is formed, and the projection 26 is vertically inserted into the engagement hole 19 from the lower end thereof. The split member 4 has a length substantially equal to that of the wedge member 5 and a width that can be freely fitted in the wedge groove 8.

The lower surface of the split member 4 is tapered so as to coincide with the upper surface of the wedge member 5. The upper surface is formed in an arc shape, and the cross-sectional shape (end surface shape)
It has a kamaboko shape.

With the tip of the wedge member 5 inserted into the wedge-shaped space 27 between the wedge groove 8 and the split member 4 (see FIG. 4), the upper surface of the split member 4
As shown by the solid line in FIG. 2, the height substantially coincides with the upper surface of the wedge groove 8, and at the same time, approximately coincides with the height of the outer peripheral surface of the protective cylinder 1.

The pipeline crushing apparatus according to the embodiment is as described above, and the pipeline 11 is crushed by the following procedure.

As shown in FIG. 2, the cable 13 is connected to the conduit 1
Although it is in contact with the bottom surface of the cable insertion hole 12, there is a gap around the cable insertion hole 12, which widens upward. Therefore, near the end face of the pipeline 11, the lower half of the protective cylinder 1b extends along the lower half of the cable 13, and the upper half of the protective cylinder 1a covers the upper half.
The protective cylinders 1b are integrated by hooking the locking members 7 together.

Next, the cable 13 is inserted into the cable insertion hole 12.
While slightly lifting the inside of
3 into the gap between the cable insertion hole 12. The pushing amount is such that the rear end face of the protection cylinder 1 coincides with the end face of the conduit 11.

The adapter 3 is previously attached to the hydraulic cylinder 2.
And a split member 4 attached to the adapter 3.
Then, the wedge member 5 is attached, the split member 4 and the wedge member 5 are inserted into the wedge groove 8 on the upper surface of the upper protection cylinder half 1a, and the recess 21 of the adapter 3 is bolted to the end face of the upper protection cylinder half 13. 22.

Thereafter, when hydraulic pressure is applied to the hydraulic cylinder 2, the piston 24 and the wedge member 5 connected to the piston 24 advance toward the back of the wedge-shaped space 27.

As the wedge member 5 advances, the split member 4 is pushed outward (see the dashed line in FIG. 2), and a pressing force is applied to the inner surface of the cable insertion hole 12. The reaction force of the pressing force is received by the bottom surface of the cable insertion hole 12 that has come into contact with the protection cylinder 1 via the protection cylinder 1. When a pressing force stronger than a certain level is applied, cracks are generated in the pipeline 11 (see FIG. 6).

The cable insertion hole 1 which requires such operations is
The process is repeated every two times, and a part of the pipeline 11 is crushed and removed by performing a hanging operation or a mechanical crushing operation using the cracked portion as a clue.

[0028]

As described above, the present invention uses a protection tube inserted around a cable, applies a pressing force to a split member by a wedge member inserted into a wedge groove provided on the outer surface of the protection tube, and applies a pressing force to the split member. Since the force is received on the inner surface of the cable insertion hole through the protective cylinder, there is no need to drill a pilot hole in the pipeline, and no external force is applied to the cable, making crushing work safe and efficient in the live state. Can be done.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a partially omitted embodiment.

FIG. 2 is a sectional view of the assembled state of the above.

FIG. 3 is a perspective view of a use state of the above.

FIG. 4 is an enlarged cross-sectional view of the same use state as above.

FIG. 5 is a plan view of the usage state of the above.

FIG. 6 is an enlarged cross-sectional view of the same use state as above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protective cylinder 1a Upper protective cylinder half 1b Lower protective cylinder half 2 Hydraulic cylinder 3 Adapter 4 Split member 5 Wedge member 6, 6 ', 6a, 6a' Concave part 7 Locking tool 8 Wedge groove 9 Groove bottom 11 Pipe DESCRIPTION OF SYMBOLS 12 Cable insertion hole 13 Cable 14 Screw part 15 Rear end wall 16 Screw hole 17 Front end wall 18 Square hole 19 Engagement hole 21 Depression 22 Bolt 23 Engagement claw 24 Piston 25 Engagement groove 26 Projection piece 27 Wedge-shaped space

Claims (3)

[Claims] 1. A wedge groove in a length direction thereof is formed on an outer surface of a protection cylinder inserted into a gap between an inner surface of a cable insertion hole and a cable inserted therein, and a tip of a cylinder driven by pressure of a fluid. A split member fitted to the wedge groove at the end of the adapter so as to be movable in the radial direction of the protection cylinder, and a gap between the groove bottom of the wedge groove and an opposing surface of the split member. A cable conduit crushing device in which a wedge member attached to a tip of a piston of the cylinder is fitted into a wedge-shaped space, and the split member is pushed up higher than the outer peripheral surface of the protection cylinder as the wedge member advances. 2. The protection cylinder according to claim 1, wherein the protection cylinder comprises a combination of a half-cylindrical upper protection cylinder half and a lower protection cylinder half, and a locking member is attached to an outer surface of a butt portion of the two protection cylinder halves. The cable conduit crushing device according to claim 1, wherein the two protection cylinder halves are detachably connected to each other in a cylindrical shape. 3. The thickness of the protection cylinder is formed so that the surface of the lower protection cylinder half that contacts the cable insertion hole is the thinnest, and the thickness increases gradually as the distance from the surface increases. 3. The cable conduit crushing device according to 2.