JPH0898354A - Cable extending tool - Google Patents

Abstract

PURPOSE: To perform a traction work smoothly by dealing well with a frictional resistance which is generated at the time of tracting a cable. CONSTITUTION: This tool is so structured that a main body 1 which makes a cable C pass through and is supported by is swingably assembled in the cable extending direction in a suspending metal fitting 2 which is so installed on a supporting line section C's of an already established self-supported-type cable Cs that it may be mounted and demounted freely. The suspending metal fitting 2 is constituted of a pair of holding pieces 9, 10 which holds the supporting line section C's and a bolt 11 which tightens the holding pieces 9, 10. The main body 1 of the tool is constituted of a ring body which is constituted of a main lever 3 where rollers 6, 6,... are assembled and an opening and closing lever 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable drawing tool used when a cable is drawn along a support wire.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Utility Model Laid-Open No. 3-7607, a metal rod is bent in a U-shape to provide a cable receiving portion, and a resin roller is rotatably assembled to the receiving portion. On the other hand, there is a structure in which the hooking portions provided at both ends of the cable receiving and supporting portion are hooked on the support wire.

[0003]

In the conventional structure described above, the cable is supported by the roller, and when a pulling force is applied to the cable during the wire drawing work, the roller rotates to absorb the frictional resistance. Although it is practical in this respect, it is used as a whole so that it is hooked on the support wire and fixed so that the rotation of the roller is smooth due to dust clogging or other reasons. If it is not performed, the wire drawing work may be hindered because the frictional resistance absorbing means is damaged.

The present invention has been devised for the purpose of providing a cable wire drawing tool which pays attention to such a conventional example and sufficiently copes with a frictional resistance caused by a cable pulling operation.

[0005]

[Means for Solving the Problems] A hanging metal fitting that is detachably attached to an existing support wire has a structure in which a tool main body for penetrating and supporting a cable is assembled so as to be swingable in a cable extending direction, The hanging metal fitting is composed of a pair of holding pieces for holding the supporting wire and a tightening bolt for tightening the holding piece, or the tool main body is composed of a ring body composed of a main body rod and an opening / closing rod,
Engagement that rotatably assembles the base of the opening and closing rod to one of both ends of the main rod that has a separation gap wider than the outer diameter of the cable, and engages releasably with a receiving piece provided on the other The hook is provided at the tip of the opening and closing rod.

Incidentally, it is preferable to rotatably assemble a roller which rotates by contacting the cable with the tool main body.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of a cable drawing tool according to the present invention. FIG. 1 is a front view and FIG. 2 is a partially cutaway side view.

A cable drawing tool A according to the present invention is constructed by assembling a tool main body 1 and a hanging metal fitting 2 to each other, and the tool main body 1 is a main body rod 3 formed by bending a metal rod.
The main rod 3 is provided with an upper circular arc portion 3a and a lower circular arc portion 3b.
A separation gap 5 wider than the outer diameter of the cable C is provided between a and 3b, and a large number of resin rollers 6, 6, ... It is attached.

At one end on the lower arc portion 3b side of the main rod 3,
The base portion of the opening / closing rod 4 is rotatably assembled to the upper arc portion 3a.
A receiving portion piece 7 is provided at the other end on the side, and an engaging hook 8 that engages with the receiving portion piece 7 in a freely disengageable manner is provided at the tip of the opening / closing rod 4.

The hanging metal member 2 comprises, as main members, a pair of holding pieces 9 and 10 having bent portions 9'and 10 'at their ends and a tightening bolt 11 for tightening the holding pieces 9 and 10 to each other. The upper arc portion 3 of the main body rod 3 of the tool main body 1 is provided in the long holes 12 and 12 provided in the holding pieces 9 and 10, respectively.
The tool body 1 is provided with the holding pieces 9 and 10 so as to penetrate a.
Nut material 13 attached to one holding piece 10
And the tightening bolt 11 through which the other holding piece 9 is passed.
The tip of is screwed.

A tightening bolt 11 is provided between the two holding pieces 9 and 10.
With the coil spring 14 penetrating therethrough, the both holding pieces 9 and 10 are urged in a direction of separating from each other.

When the tightening bolt 11 is tightened so that the support wire portion C's of the self-supporting cable Cs is interposed between the two holding pieces 9 and 10, the holding pieces 9 and 10 are supported by the support wire portion C '. By holding s, the hanging fitting 2 is fixed at the supporting wire portion C's of the self-supporting cable Cs, and the cable drawing work can be performed. In this state, when the newly installed cable C is pulled while being placed on the rollers 6, 6, ... Of the tool main body 1, the cable C sequentially moves, and if friction resistance occurs during this movement, the tool main body 1 extends. It swings in the direction of the line to reduce frictional resistance.

After the pulling operation is completed, the locking hook 8 of the opening / closing rod 4 is removed from the receiving piece 7, and the extension tool A is removed from the cable C through the separation gap 5, while the self-supporting cable Cs is tightened with a tightening bolt. The wire drawing tool A is removed by loosening 11.

Incidentally, instead of the self-supporting cable Cs, a so-called supporting wire (messenger wire) is used as the wire drawing tool A of the present invention.
You may attach and use.

In the embodiment, a large number of resin rollers 6, 6, ... Are assembled to the tool main body 1, but metal rollers may be used, or a single roller may be used. Is also good.

It is convenient for the tightening bolt 11 to be pinched as in the embodiment, but it goes without saying that a normal hexagon head bolt may be used.

[0017]

The present invention has the configuration described above,
Compared with the conventional fixed type, the frictional resistance generated when pulling the cable can be dealt with, and thus the pulling work can be performed smoothly.

Further, it is possible to smoothly attach and detach the supporting wire or the cable, and it is possible to provide an extending wire which is convenient for handling as a whole.

[Brief description of drawings]

FIG. 1 is a front view.

FIG. 2 is a partially cutaway side view.

[Explanation of symbols]

 1 Tool main body 2 Suspension metal fitting 3 Main rod 4 Opening / closing rod 5 Separation gap 6 Roller 7 Receiving part piece 8 Locking hook 9 Holding piece 10 Holding piece 11 Tightening bolt

Claims (4)

[Claims] 1. A cable-drawing tool in which a hanging metal fitting that is detachably attached to an existing support wire has a tool main body that supports a penetrating and supporting cable so as to be swingable in the cable-drawing direction. 2. The cable drawing tool according to claim 1, wherein the suspending metal member comprises a pair of holding pieces for holding the support wire and a tightening bolt for tightening the holding piece. 3. The tool main body is composed of a ring body composed of a main body rod and an opening and closing rod, and the base of the opening and closing rod is rotatably attached to one of both ends of the main body rod having a separation gap wider than the outer diameter of the cable. The cable drawing tool according to claim 1 or 2, further comprising an engaging hook that is provided at the tip of the opening and closing rod so as to be engaged with and disengageably engage with a receiving portion piece provided on the other side. 4. The cable extension tool according to any one of claims 1 to 3, wherein a roller that rotates in contact with the cable is rotatably attached to the tool main body.