JPH0865844A - Tool for laying cable - Google Patents

Abstract

PURPOSE: To enable laying operation of a cable while ensuring a sufficient bending radius permitted even at a small place. CONSTITUTION: In a tool for laying, a plurality of rollers 1 are arranged on a circular arc, and a pair of curve rollers 3 rotatably held by support plates 2 are mounted on both sides of a U-shaped connecting support member 4 in a rockable manner. A plurality of pinholes 5 are bored to both side end sections of the connecting support member 4 and the support plates 2 of each curve roller 3 respectively, adjusting fixing pins 6 are inserted into one or two the pinholes 5 superposed on a straight line, and each curve roller 3 is fastened onto the connecting support member 4 while mutually keeping the specified degree of opening. A hook 7, to which the wire, etc., of a traction mechanism such as a winch is connected, is fixed at another end of the connecting support member 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable routing tool, and more particularly to a cable routing tool used when removing or repositioning an existing cable in a narrow space.

[0002]

2. Description of the Related Art Conventionally, so-called wiring has been performed in which an existing cable is pulled out from a pipeline or the like to change the laying position, for example, along with a change in the route of an underground power transmission line. And
Such work is usually performed when the length of the cable is relatively short, and is almost always performed manually.

[0003]

However, in such a routing work, when the working space such as the manhole is sufficiently wide, a sufficiently large bending radius can be secured without paying much attention to the allowable bending radius of the cable. However, if the work area is narrow, it is very difficult to perform the wiring work while ensuring the allowable bending radius of the cable, not only the work efficiency is poor, but also the bending of the cable exceeds the allowable limit. There was a risk that the performance would decrease.

The present invention has been made to solve such a problem, and is a cable routing tool capable of performing cable routing work while securing a sufficient bending radius allowed even in a narrow space. The purpose is to provide.

[0005]

A cable routing tool according to the present invention comprises a connecting and supporting member having a locking tool capable of connecting a pulling mechanism and a plurality of rotatable rollers arranged in an arc. A pair of curve rollers attached to both sides of the connection support member in a substantially symmetrical and swingable manner, and a fixing member for fixing the end portions of the respective curve rollers to the connection support member and restraining the oscillation. And the degree of opening between the curve rollers can be adjusted by changing the fixing position of the fixing member.

[0006]

In the cable routing tool of the present invention, the pair of curved rollers symmetrically arranged on both sides of the connecting and supporting member are fixed and fixed to the connecting and supporting member by the fixing members respectively, and the position of the fixing member is fixed. The degree of difference between the curved rollers is adjusted by changing the curved surfaces, and a continuous curved surface having a desired radius of curvature, that is, a radius of curvature greater than or equal to the allowable bending radius of the cable to be routed, is formed on the outer peripheral surfaces of the plurality of rollers forming each curved roller Are formed. Therefore, by pulling out the cable along each roller surface of the curved roller pair fixed by adjusting the degree of mutual opening in this way, and connecting a pulling mechanism such as a winch to the locking tool and pulling the cable, Is always kept in a state where the bending radius is larger than the allowable bending radius.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a cable routing tool according to the present invention, and FIG. 2 is a line A- in FIG.
FIG.

In the drawings, reference numeral 1 denotes a roller having a roller surface 1a whose central portion is recessed so as to easily hold a cable. A plurality of such rollers 1 are arranged in an arc with their axes parallel to each other. In addition, a curved roller 3 is formed by being rotatably sandwiched from the end face side by two support plates 2. A pair of such curved rollers 3 are arranged substantially symmetrically on both sides of the U-shaped connecting support member 4 and are swingably attached. That is, the one end of each curve roller 3 is inserted between the two plate-shaped parallel portions 4a at the end of the connection support member 4, and the roller 1 closest to the center is inserted.
The rotating shafts 1b protruding through the support plate 2 are fixed through the parallel portions 4a. Also,
On both side end portions of such two plate-shaped parallel portions 4a and on the support plate 2 of each curve roller 3 overlapping these portions,
A plurality of pin holes 5 are formed in a circular arc along the outer peripheral line of the end surface of the roller 1, and these pin holes 5 are straight in parallel with the axis of the roller 1 at a predetermined swing position of the curve roller 3. It is designed to overlap on the line. Then, the adjusting fixing pin 6 which is a fixing member is inserted into one or two or more of the pin holes 5 thus overlapped with each other, and thus the respective curve rollers 3 are connected and supported while maintaining a predetermined opening degree to each other. It is fixed to the member 4. further,
A locking tool (hook) 7 to which a wire or the like of a pulling mechanism such as a winch is coupled is fixed to the opposite end of the coupling support member 4.

The cable routing tool of the embodiment thus constructed is used as shown below. That is, first, in the wiring tool of the embodiment, the position of the pin hole 5 into which the adjustment fixing pin 6 is inserted is set to the degree of opening between the curve rollers 3, that is, the angle formed by the tangents of the roller continuous surfaces of the curve rollers 3. The roller 1 (roller surface 1a) is adjusted accordingly to form a continuous curved surface having a radius of curvature equal to or greater than the allowable bending radius of the cable. Then, as shown in FIG. 3, the end portion of the cable 10 laid in the conduit 9 is arranged along the roller continuous surface of the drawing tool 8 set on a horizontal plane so that each roller shaft is vertical. Then, a pulling wire of a winch (not shown) is connected to the hook 7 and pulled in the horizontal direction indicated by an arrow to pull the cable 10 in the same direction along the roller continuous surface from the inside of the conduit 9. Pull out. Incidentally, reference numeral 11 in the drawing
Indicates a fixed end of the cable 10, and reference numeral 12 indicates an arc-shaped guide member having a radius of curvature equal to or larger than the allowable bending radius of the cable 10.

As described above, according to the cable routing tool 8 of the embodiment, the cable 10 is always pulled out from the pipe 9 while being kept at a bending radius larger than the allowable bending radius. The cable can be routed efficiently without paying attention to bending beyond the limit.

In the above-described method of using the tool, an example in which the tool is set on a horizontal plane, the cable 10 is placed along the roller continuous surface, and then the cable 10 is pulled in the horizontal direction has been described. A similar effect can be obtained by arranging the tool vertically with the hook 7 on the upper side, and after the cable 10 is hung on the upper roller continuous surface, the entire tool is pulled upward.

[0013]

As described above, according to the cable routing tool of the present invention, by adjusting the fixing position of the fixing member, the opening degree between the curve rollers is changed, and the allowable bending radius of the cable to be routed is changed. Since it is possible to form a roller continuous surface having the above radius of curvature,
By pulling out the cable along each roller surface of the curved roller pair adjusted in this way, the cable can be routed even in a narrow place while ensuring a sufficient bending radius. Therefore, the efficiency of the wiring work is improved, and the performance of the cable is not deteriorated due to bending.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a cable routing tool of the present invention.

FIG. 2 is a view on arrow AA in FIG.

FIG. 3 is a diagram schematically showing a usage mode of the wiring tool of the embodiment.

[Explanation of symbols]

 1 ………… Roller 3 ………… Curve roller 4 ………… Coupling support member 5 ………… Pin hole 6 ………… Adjustment fixing pin 7 ……… Hook 8 ……… Cable routing tool 9 ……… Tube Road 10 ……… Cable

Claims (1)

[Claims] 1. A connecting support member having a locking tool capable of connecting a pulling mechanism and a plurality of rotatable rollers arranged in an arc, and swingable substantially symmetrically on both sides of the connecting support member. A pair of curve rollers attached to each other, and a fixing member for fixing the end portion of each of the curve rollers to the coupling support member to restrain the swing, and by changing the fixing position of the fixing member, A cable routing tool, characterized in that the degree of opening between the curved rollers can be adjusted.