JPH08308054A - Cutting method and device for cable insulating material - Google Patents

Abstract

PURPOSE: To prevent the generation of the remainder of an external semiconductor layer by gripping an exposed conductor and the external semiconductor layer exposed on the opposite side, making a positional adjustment for the gripping parts in a vertical and a left and right directions and cutting the external semiconductor layer by using a rotary cutting tool to eliminate the overcutting of an internal semiconductor layer and the cutting of the conductor. CONSTITUTION: An exposed conductor 2 is nipped by a conductor nipping part 12, and the external semiconductor layer 5 of a cable is nipped by a cable nipping part 14. Next, a cutting tool 19 is allowed to come near an internal semiconductor layer 3 and a cutting unit 18 is rotated and a centering adjustment is made by a vertical and horizontal adjustment mechanism 13. On the other hand, the external semiconductor layer 5 of the cable is adjusted by the vertical and left and right adjustment mechanism 15 of the external semiconductor nipping part 14 so that the external semiconductor layer 5 of the cable comes to a uniform distance from the cutting tool 19. After the adjustment is finished, the cutting unit 18 is rotated and moved in the axial direction to start cutting. Therefore, the problem of the remainder of the external semiconductor layer, the overcutting of the internal semiconductor or the like is solved, so that high reliable cutting may be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cutting an insulator of a plastic power cable such as a CV cable (crosslinked polyethylene insulated power cable).

[0002]

2. Description of the Related Art When forming an intermediate connection portion or a termination connection portion of a plastic power cable such as a CV cable, it is necessary to cut a cable insulator over a certain axial length to a required depth. Conventionally, rough cutting was performed with a manual insulator cutting device, and then finishing was performed manually using glass pieces. However, in such a conventional manual work, (1) individual differences easily occur. (2) Advanced skills are required. (3) Foreign matter such as glass fragments is easily mixed. There is a problem such as.

In order to solve these problems, mechanization of cutting a plastic power cable insulator has been attempted. FIG. 2 is a side view showing a partial cross section of an example of the examined cable insulator cutting device. The outer semiconductive layer 5 of the cable is exposed as shown in the drawing. Then, near the exposed end of the outer semiconductive layer 5, the base frame 1
It is gripped by a cable grip fitting 21 supported by a supporting device 20 fixed to one end of the cable 1. On the other hand, on the side opposite to the cable grip fitting 21, the outer semiconductive layer 5 is gripped by the cable grip fitting 23 supported by the supporting device 22 fixed to the other end of the base frame 11. A cutting tool 19 is attached to an electric frame 17 provided between the two cable grips 21 and 23 so as to be movable in the axial direction of the cable on a guide portion 16 provided on the base frame 11 and is rotatable. A guide roller 24 that holds the cutting unit 18 and the axis of the cable is installed. By the rotation of the cutting unit 18 and the axial movement of the electric table 17, the cutting tool 19 causes the inner semiconductive layer 3 of the cable 3 and the insulator 4 to move. , And the outer semiconductive layer 5 are cut.

[0004]

When a cable insulator is cut by using the above-described insulator cutting device, even if the bend of the cable is corrected before cutting, the bend cannot be completely corrected. If both ends of the cutting tool are gripped, the center of the cable at the cutting portion and the center of rotation of the cutting tool are displaced, and uncut parts of the outer semiconductive layer are left. Furthermore, the cable insulator has an uneven thickness, and even if the inner conductor is centered on the basis of the outer conductor, when the inner conductor is trimmed, the inner conductor is misaligned and the inner conductor is cut too much or the conductor is also cut. There is a problem.

[0005]

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for cutting a cable insulator which solves the above-mentioned problems, and a first feature thereof is that the conductor at the end of the cable is exposed, Grasp the exposed conductor with the conductor gripping metal part, expose the outer semiconductive layer of the cable on the side opposite to the conductor, grip the exposed outer semiconductive layer with the cable gripping metal, and move the gripping part vertically and horizontally. After adjusting the position, the cutting method of the cable insulator is performed by cutting the inner semi-conductive layer insulator and the outer semi-conductive layer of the cable using a rotating cutting tool.

A second feature of the present invention is that a grip portion of a cable conductor having a fine adjustment mechanism for vertical and horizontal directions is provided at one end of a base frame, and a cable grip having a vertical adjustment mechanism is provided at the other end of the base frame. A cable insulator cutting device is provided with a rotary cutting unit having a cutting tool that is provided with a cutting tool that moves in the length direction of the cable along a guide section provided on the base frame between the gripping sections. .

[0007]

In the present invention having the above-mentioned structure, the uneven thickness of the cable insulator can be adjusted by gripping the conductor at the tip of the cable with reference to the inner conductor. It is possible to eliminate excessive cutting of the inner semiconductive layer and cutting of the conductor due to uneven thickness. Further, in the cutting portion of the outer semiconductive layer, since the gripping portion of the outer semiconductive layer performs centering on the basis of the outer semiconductive layer, there is no uncut portion of the outer semiconductive layer due to bending of the cable.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) is a side view showing a partial cross section of a concrete example of the cable insulator cutting device of the present invention, and FIG.
FIG. 3 is a view on arrow XX in FIG. In the drawings, 1
Reference numeral 1 denotes a base frame (not shown) in which a feeding mechanism such as a motor and a ball screw is incorporated, and at one end thereof, there is a grip portion 12 of a cable conductor provided with a vertical / horizontal direction adjusting mechanism 13, and an exposed conductor 2 Is holding. On the other hand, the other end of the base frame 11 is provided with an adjusting mechanism 15 for vertical and horizontal directions.
There is a cable gripping portion 14 provided with, and grips the exposed outer semiconductive layer 5. The two grips 12, 14
In between, there is an electric table 17 that moves axially along a guide portion 16 on the base frame 11 by a feed mechanism built in the base frame 11, and a cutting tool 19 is attached to the table 17. The unit 18 is rotatably installed.

As shown in FIG. 1, after the exposed conductor 2 is gripped by the conductor gripping part 12 and the outer semiconductive layer 5 of the cable is gripped by the cable gripping part 14, the cutting tool 19 is fixed by the inner semiconductive layer 3. The cutting unit 18 is rotated closer to the position, and the center is adjusted by the up / down / left / right adjusting mechanism 13. On the other hand, the outer semiconductive layer portion is adjusted by the vertical / horizontal direction adjusting mechanism 15 of the outer semiconductive layer gripping portion 14 so that the outer semiconductive layer 5 of the cable has an equal distance from the cutting tool 19. After these adjustments are completed, the cutting unit 18 is rotated and moved in the axial direction to start cutting.

In the apparatus shown in FIG. 1, the cutting tool 19 has 12
Three pieces are attached to the cutting unit 18 at intervals of 0 °. By thus mounting three cutting tools 19 at 120 ° intervals, it is possible to increase the amount of cutting per unit time and reduce the vibration of the cable due to the pressing of the cutting tools 19 to improve the surface roughness. Is possible. However, the number of cutting tools is not limited to three.

[0011]

As described above, according to the present invention,
It is possible to solve the problems such as the uncut portion of the outer semiconductive layer due to the bending of the cable and the excessive cutting of the internal semiconductor due to the uneven thickness of the cable insulator, and to perform highly reliable cutting of the cable insulator. Therefore, it is effective when used for cutting the cable insulator when forming the intermediate connection portion and the termination connection portion of the high voltage CV cable or the like.

[Brief description of drawings]

FIG. 1 is an explanatory view of a specific example of a cable insulator cutting device of the present invention, FIG. 1 (a) is a side view showing a partial cross section, and FIG. 1 (b) is an arrow XX in FIG. It is a perspective view.

FIG. 2 is a side view showing a partial cross section of an example of a conventional cable insulator cutting device.

[Explanation of symbols]

 1 Cable 2 Conductor 3 Inner Semi-Conductive Layer 4 Insulator 5 Outer Semi-Conductive Layer 11 Base Frame 12 Conductor Grips 13, 15 Vertical and Horizontal Position Adjusting Mechanism 14 Cable Grip 16 Guide Part 17 Electric Table 18 Cutting Unit 19 Cutting Tool

Claims (2)

[Claims] 1. A conductor at a cable end is exposed, the exposed conductor is held by a conductor gripping metal, an outer semiconductive layer of the cable is exposed on the side opposite to the one conductor, and the exposed outer semiconductive layer is removed. After gripping with the cable gripping metal fitting and adjusting the position of these gripping parts in the vertical and horizontal directions, the inner semiconductive layer, the insulator and the outer semiconductive layer of the cable are cut using a rotating cutting tool. Method for cutting cable insulation. 2. A base conductor is provided with a cable conductor gripping portion provided at one end thereof with a cable conductor gripping portion provided with vertical and horizontal fine adjustment mechanisms, and at the other end thereof is provided with vertical and horizontal fine adjustment mechanisms. A cable cutting portion is provided, and a rotary cutting unit having a cutting tool that moves in the length direction of the cable along a guide portion provided on the base frame is provided between the holding portions. Cutting device for cable insulation.