JPS61241222A - Method of removing end section cover of insulated trolley and removing tool therefor - Google Patents

Abstract

PURPOSE:To make it possible to remove an end cover of a multiple cable type trolley, by cutting the position which corresponds to the inner end edge of removal section of an insulating cover for the trolley, and by cutting the section between conductors by the length from the above-mentioned position to the position of the outer end edge. CONSTITUTION:In a multiple cable type insulated trolley 3 in which five conductors 5 laid in parallel with each other are covered with an insulating cover 2, the cover 2 is formed by connecting five U-like shape locking parts 2a through the intermediary of connecting parts 2b. In order to remove an end cover of the insulated trolley 3, at first the position 5 which corresponds to the inner edge of a part 4 to be removed in the insulating cover 2 is cut from end to end with the use of a removing tool having a pair of cutting edges 17a, 17b without the conductors being harmed, so that a slit 6 is formed. Further, a slit 8 is formed in each connecting section 2b by the length from the position 5 to the position 7 which corresponds to the outer end edge of the part 4 with the use of the other pair of cutting edges 18a, 18b. Thereafter, every cut piece of the part 4 for each conductor 1 is pulled to be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to a method and tool for removing end covers of multi-wire insulated trolleys.

[Background technology]

Some insulated trolleys are multi-wire, that is, they are equipped with a plurality of parallel conductors, and these conductors are covered with an insulating cover leaving one side serving as the electrical supply surface. When connecting the insulating trolley to another insulating trolley, etc., it is necessary to remove a predetermined length of the end of the insulating cover to expose the conductor. Conventionally, when removing the end portion of the insulating cover of a multi-wire insulating trolley, the end portion was cut or scraped little by little using a saw, drill, or the like. However, such a method has the problem that it takes a long time to work and has poor workability. Further, since the conductor is damaged, there is also a problem that the quality, performance, etc. of the insulated trolley are deteriorated.

[Purpose of the invention]

The present invention has been made to solve such problems, and aims to provide a method and tool for removing the end cover of an insulated trolley that is easy to work with and reduces the risk of damaging the conductor. There is.

[Disclosure of the invention]

In order to achieve the above-mentioned object, the first invention provides a multi-layer electrical conductor which is provided with a plurality of conductors arranged in parallel and covered with an insulating cover with one side left as an electricity supply surface. When removing a predetermined length of the end cover of the wire insulated trolley, a cut is made at the inner edge of the portion of the insulating cover to be removed, and a cut is made between the conductors from the inner edge to the outer edge. The gist is a method for removing the ends of an insulated trolley, which is characterized by making a cut along the length up to the position and pulling out the part of the insulating cover to be removed for each conductor end. Second
The invention provides a tool used to carry out the first invention, which includes two handles that are fixed to each other at their ends, and which are connected to the same end of each handle to open and close the handles. It has an upper jaw and a lower jaw that move to open and close when the insulation cover is removed.The upper jaw and the lower jaw have an upper jaw and a lower jaw that move to open and close when the insulation cover is removed. A first blade that makes a cut by a width reaching , and a second blade that makes a cut along the length from a position that is the inner edge of the inter-conductor portion to a position that is the outer edge, are provided in a hook shape. and at least one of the first blades of the upper jaw and the lower jaw is insulated, characterized in that a part of the first blade of the upper and lower jaws is retracted so that the blade edge does not hit the conductor when the two upper and lower first blades are engaged. Its gist is a tool for removing end covers of trolleys. Below, the first and second inventions will be explained in detail.

First, the first invention will be explained using FIGS. 1(a) and 1(b). Here, five conductors 1 arranged in parallel are provided,
A multi-wire insulated trolley 3 is provided in which these conductors 1 are covered with an insulating cover 2. Insulation cover 2
The five inverted U-shaped locking parts (see Figure 5) 2a are the connecting parts 2.
It is connected by b. The conductor 1 is fixed to the inner upper end of the inverted U-shaped locking portion 2a, and is covered by the inverted U-shaped locking portion 2a so as to leave the lower surface serving as the electricity supply surface.

The first invention is implemented, for example, as follows. First, a cut 6 is made from end to end at position 5, which is the inner edge of the portion 4 of the insulating cover 2 to be removed, without damaging the conductor 1 as much as possible. In part 2b, a cut 8 is made along the length from position 5 to position 7, which is the outer edge of part 4, and part 4 is divided into conductors 1. Next, the cut body of the portion 4 is pulled out and removed for each end of each conductor. If the end cover is removed in this way, the working time is very short and the work efficiency is very good, and the risk of damaging the conductor is reduced.

Moreover, similar effects can be obtained even if the first invention is implemented as follows. First, at position 5 of the portion 4 to be removed, the inverted U-shaped locking portion 2a covering the conductor l at one end
A cut is made with a width extending from 1 to 2 to reach the adjacent connecting part 2b, and a cut is made along the length of the connecting part 2b from position 5 to position 7 where this cut reaches, creating a hook-shaped cut as a whole. Next, pull out the part where the dashed line of part 4 is diagonally drawn. In the same manner, the part 5 to be removed is pulled out from each conductor part in order from the end, and in the last conductor part at the other end, a cut is made in the width direction only at position 5 and pulled out.

The removal method in which a hook-shaped cut is made and the part to be removed is pulled out one by one from the end of each conductor can be easily carried out on site by using the removal tool according to the second invention.

Next, the removal tool according to the second invention will be explained.
), as shown in (b), the two handles 9a, 9
An upper jaw 10a and a lower jaw 10b are connected to the tips of both vessels 9a and 9b by shafts 1)8.1)b, respectively. The inside tips of the handles 9a and 9b are connected to each other by a shaft 12. A bar 13 with a circular cross section is sandwiched between the upper jaw 10a and the lower jaw 10b, and arc-shaped recesses 14a and 14b provided inside the upper jaw 10a and the lower jaw 10b form the circumference of the bar 13. It is fitted in and slides. An upper jaw 10a and a lower jaw 1 are provided on both sides of the rod 13.
Side plates 15.15 (only one side is visible in FIG. 2) are arranged so as to sandwich 0b.
The upper jaw 10a and the lower jaw lOb are attached to the upper and lower ends of the shaft 16a.
, 16b, respectively. Upper jaw 10a
When the lower jaw iob opens and closes the handles 9a and 9b, the shaft 16
The tips rotate around a and 16b so that their tips can open and close with each other. On the inner surfaces of the upper jaw 10a and the lower jaw 10b, first blades 17a, 1 are provided at corresponding positions on the front ends.
7b is provided, and a second blade tea is provided at a corresponding position on one side.
, 18b are provided, and the blades 17a and 18a and the blades 17b and 18b are arranged in a hook shape, respectively. The middle part of the blade 17b has a recess 19 into which the conductor of the insulated trolley fits.
are provided, and blades 17b are provided at both ends of the recess 19.
is retracted to form a retracted portion 20. A protrusion 21 is provided at a position below the recess 19 on the front surface of the lower jaw 10b. A step stopper 22.22 is provided on both sides of the middle portion of the lower jaw tab. Here, the distance from the blade 17b to the stopper 22 is matched to the length of the portion of the insulating cover to be removed. A nut 23 is fixed to the inside of the intermediate portion of the handle 9a by welding or the like. A bolt (adjustment screw) 24 is inserted into this nut 23, and when both tanks 9a and 9b are closed, the inside of the intermediate portion of the handle 9b will come into contact with the head of the bolt 24. Therefore, by adjusting the amount of protrusion of the bolt 24, both tanks 9a, 9
By adjusting the minimum angle of b, blades 17a and 17b, blade 18a,
The minimum spacing between 18b can be adjusted.

Attach the bolt 24 to the nut 2 with a predetermined protrusion amount.
3, a nut 25 for fixing is inserted.

Using this removal tool, make a hook-shaped cut in the end cover, for example, as follows. First, as shown in FIG. 5, the upper jaw 10a and the lower jaw 10b are opened, and both ends of the U-shaped locking portion 2a of the insulating cover 2 are inserted into the recess 19. Next, both ends of the U-shaped locking portion 2a are connected to the stoppers 22 (
Insert the insulating trolley 2 until it hits point (see (b) in Figure 4). Next, the upper jaw 10a and the lower jaw tab are closed. At this time, the convex portion 21 is inserted between both ends of the U-shaped locking portion 2a, and serves as a guide for guiding the concave portion 19 to fit into the conductor 1. The blades 17a and 17b make a cut with the width from the U-shaped locking part 2a to the connecting part 2b, and the blades 18a and 18b
and makes a cut along the length of the connecting portion 2b, so that a hook-shaped cut is made in the end cover. Since the conductor 1 is fitted into the recess 19, there is little risk of it being damaged. Next, the cut portion of the insulating cover is pulled out by hooking it onto the blades 17a and 17b.

This removal tool is compact and can be handled in the same way as pliers or nippers.

In the embodiment of the removal tool, only the first blade of the lower jaw is provided with a retracting portion, but the retracting portion is provided on the first blade of both the upper jaw and the lower jaw or the first blade of only the upper jaw. A section may be provided.

〔Effect of the invention〕

A method for removing an end cover of an insulating trolley according to the first invention includes a plurality of conductors arranged in parallel, and these conductors are covered with an insulating cover so as to leave one side serving as an electricity supply surface. When removing a predetermined length of the end cover of a multi-wire insulating trolley, a cut is made at the inner edge of the part to be removed, and a cut is made between the conductors from the inner edge to the outer edge. Since cuts are made along the length up to the edges and the parts of the insulating cover to be removed are pulled out at each end of each conductor, the work is easy and there is little risk of damage to the conductors. Further, the removal tool according to the second invention includes two handles that are fixed to each other at the ends, and an upper part that is connected to the same end of each handle and moves to open and close when the handles are opened and closed. Each of the upper and lower jaws is provided with a lower jaw, and at the corresponding positions of the upper and lower jaws, a cut is made at the inner edge of the part to be removed of the insulating cover by a width extending from the conductor covering part to the part between the conductors. The first blade and the second blade which makes a cut along the length from the inner edge to the outer edge of the inter-conductor portion are provided in a hook shape, and the second blade makes a cut along the length of the portion between the conductors. At least one of the first blades is
When the two upper and lower first blades are engaged, a part of the blade is retracted so that the cutting edge does not touch the conductor, so if you use this, you can easily cut the end of the insulated trolley without damaging the conductor. The cover can be removed.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are explanatory diagrams of the removal method according to the first invention, Figure 2 is a front view of the removal tool according to the second invention, and Figure 3 is a top view of the removal tool. A front view with part of the jaw and lower jaw cut away, Figure 4 (a) is a bottom view of the upper jaw of the remover, and Figure 4 (b) is a plan view of the lower jaw of the remover. , FIG. 5 is an explanatory diagram of the end cover removal operation using the same removal tool. 1... Conductor 2... Insulating cover 3... Multi-wire insulated trolley 4... Portion to be removed 5... Inner edge 6.8... Cut 7... Outer edge 9a ,9
b...Handle 10a...Upper jaw 10b...Lower jaw
17a, 17b...first blade 18a, 18b...
Second blade 20... Retreat of the first blade Agent Patent attorney Takehiko Matsumoto 1st prisoner (a) Figure 3 Figure 4 (a) , / 10 a 0b

Claims (3)

[Claims] (1) Removal of a predetermined length of the end cover of a multi-wire insulated trolley that is equipped with multiple conductors arranged in parallel and covered with an insulated cover leaving one side where these conductors serve as the electricity supply surface. To do this, make a cut at the inner edge of the portion of the insulating cover to be removed, and also make a cut along the length from the inner edge to the outer edge in the part between the conductors. A method for removing an end cover of an insulating trolley, characterized in that the portion of the insulating cover to be removed is pulled out for each conductor end. (2) Make a cut at the inner edge of the portion of the insulating cover to be removed by the width extending from the conductor covering portion to the inter-conductor portion, and make a cut from the inner edge of the inter-conductor portion to the outer edge. Make a cut along the length of each conductor end starting from the first side of the insulating cover until the end of the insulating cover ends, and at the last conductor part of the part to be removed, cut the inner edge A method for removing an end cover of an insulated trolley according to claim 1, wherein cuts are made only at positions where . (3) Removing a predetermined length of the end cover of a multi-wire insulated trolley that is equipped with multiple conductors arranged in parallel and covered with an insulating cover leaving one side where these conductors serve as the electricity supply surface. To do this, make a cut at the inner edge of the portion of the insulating cover to be removed, and also make a cut along the length from the inner edge to the outer edge in the part between the conductors. This tool is used to pull out the portion of the insulating cover to be removed from each conductor end, and has two handles that are fixed to each other at the ends, and has two handles that are fixed to each other at the ends, and a It has an upper jaw and a lower jaw that are connected to the handle and move to open and close when the handle is opened and closed, and the upper jaw and the lower jaw have a position that corresponds to the inner edge of the part to be removed of the insulating cover. A first blade that makes a cut in the width extending from the conductor covering part to the inter-conductor part, and a second blade that makes a cut along the length from the inner edge to the outer edge of the inter-conductor part. At least one of the first blades of the upper and lower jaws is provided with a hook-shaped blade, and at least one of the first blades of the upper and lower jaws is provided with two upper and lower first blades.
A tool for removing the end cover of an insulating trolley, characterized in that a part of the blade is retracted so that the blade tip does not hit the conductor when the blades are engaged.