JPH0615468Y2 - Half-divided tube for cable protection in cutting work of cable tube - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention, for example, when cutting a cable pipe body such as a vinyl pipe or a steel pipe for laying a cable in the ground with an electric cutter, It relates to a half tube for protecting the cable.

[Prior Art] In general, a cable such as a communication line is often housed in a pipe laid in the ground, and is relayed and connected in a manhole M on the way as shown in FIG.

When the manhole M is to be expanded as shown by the phantom line, it is necessary to remove the cable tube body P of the portion A, but the cable C is not affected even during the manhole remodeling work. Construction work must be carried out, and the cutting work of the cable tube P must be done with extreme caution.

In addition, such a cutting operation of the cable pipe body P is also required when a manhole is newly built in the middle of the pipe body.

[Problems to be solved by the invention] By the way, conventionally, an electric cutter has been used to cut a cable tube of this kind. First, a cut is made in the longitudinal direction of the cable tube, or a cut portion is surrounded by a circle. Although it is cut in the direction, there was a problem that the inside of the cable was damaged by the blade of the cutter, and sometimes the cable was cut.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to perform a cutting operation of a cable tube body capable of safely and efficiently cutting without damaging the cable. The purpose is to provide a half tube for cable protection.

[Means for Solving the Problem] The cable protection half-split pipe in the cutting work of the cable pipe body of the present invention is inserted near the inner surface of the cutting position of the cable pipe body to be cut and cut by a cutter. And a half-split tube body made of a material not attached to the half-split tube body, which is integrally attached along the substantially central portion of the outer surface of the rear end portion of the half-split tube body, and is inserted into the cutting groove of the cable tube cut by the cutter It is characterized by comprising a tail piece and a connecting rod for connecting the tail piece to a cutter.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a half-split tube body, which is a shape obtained by half-dividing a circular tube in the longitudinal direction, and its radius of curvature is the radius of curvature of the inner surface of the cable tube body to be inserted. It is preferable that the material has substantially the same dimensions and that the material is made of metal that is not easily cut even if the blade edge of the cutter hits.

On the outer surface of the rear end of the half-split tube main body 1, a tail piece 2 is integrally attached to the center thereof. The thickness of the tail piece 2 is thinner than the width of a cutting groove formed by cutting the cable tube body with a cutter.

The cable-protecting half-divided tube of this embodiment is constructed as described above.
As shown in the figure, the half tube body 1 is inserted into a cable tube P that houses a large number of cables (not shown) inside, and is set near the inner surface of the cutting position of the cable tube P.

When the setting of the half tube 1 is completed, the electric cutter 3 starts cutting from the end of the cable tube P. The cable in the cable tube body P is protected from the electric cutter 3 by the half-split tube body 1, and therefore is not damaged at all.

As the cutting work by the electric cutter 3 progresses, the cutting groove 4 is formed thereby, and the tail piece 2 provided at the rear end of the half-split tube main body 1 is inserted into the cutting groove 4. In this way, by inserting the tail piece 2 into the cutting groove 4, not only can the half-split tube main body 1 be prevented from rotating in the cable tube P, but it is not visible from the outside. The position of the split tube body 1 can be indirectly known by knowing the position of the tail piece 2, and the cutting operation can be safely continued.

FIG. 4 shows the connecting rod 5 of the tail piece 2 of the half-split tube body 1 of the present invention.
It shows an embodiment in which the electric cutter 3 is connected to the guide plate 6 by means of.

Therefore, the half-split tube body 1 can follow the electric cutter 3 and move forward.

The guide plate 6 moves on the cable pipe P while being guided by the guide rail 7 fixed along the cable pipe P, stably guides the electric cutter 3 set on the guide plate 6, and straightens. I am able to disconnect.

The connecting rod 5 may be in any form such as a string or a chain, and may be directly connected to the electric cutter 3 when the guide plate 6 is omitted.

[Effects of the Invention] (1) Since the half-split tube body is inserted between the tube body and the cable, the cable is protected from the cutting edge of the electric cutter and there is no risk of damage.

(2) Since the tail piece is provided in the half-split tube, the half-split tube main body can be stably and reliably held, and the cutting operation can be performed safely and quickly.

(3) The tail piece of the half-split tube is connected to the electric cutter or its guide device so that it can be followed, so that the half-split tube can be advanced reliably and smoothly, and the length of the half-split tube can be shortened. can do.

[Brief description of drawings]

FIG. 1 is a perspective view of a half-split tube of the present invention, FIG. 2 is a sectional view showing a cutting operation of a tube body using the half-split tube, and FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is a cross-sectional view taken along line II-II, FIG. 4 is a perspective view of an embodiment connected to an electric cutter, and FIG. 5 is a cross-sectional view illustrating cutting of a tubular body. 1 ... Half split tube main body, 2 ... Tail piece, 3 ... Electric cutter, 4 ...
Cutting groove, 5 ... Connection rod, P ... Cable tube body.

Claims (2)

[Scope of utility model registration request] 1. A half-split tube main body made of a material which is not cut by a cutter and is inserted near the inner surface of a cutting position of a cable pipe body to be cut, and an approximately central portion of an outer surface of a rear end portion of the half-split tube main body. And a tail piece that is fitted integrally along the section and is inserted into the cutting groove of the cable tube cut by the cutter, and the cable protection in the cutting operation of the cable tube characterized by the following: Half-split tube. 2. A half-divided tube for cable protection in cutting work of a cable pipe body according to claim 1, further comprising a connecting rod for connecting the tail piece to a cutter.