JP2523314Y2 - Cable extension tool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable extension tool which is detachably attached to a suspension line or other support when a cable is extended.

[0002]

2. Description of the Related Art A large number of guide rollers are rotatably supported on a support rod formed by bending a steel wire, and both ends of the support rod are removably attached to a suspension wire or the like to rotate the guide roller. In recent years, a so-called cable hanger, which facilitates cable drawing work, is being used.

[0003]

In the above conventional example, the frictional resistance generated when the cable is drawn is absorbed by the rotation of the guide roller, and the corresponding function is achieved.
For example, like a self-supporting optical fiber cable having a structure in which a cable and a support wire are integrated by a suspension
If the cable has irregularities on the circumferential side, the guide roller does not always rotate smoothly, making it difficult to extend the wire.In addition, when the frictional resistance is applied to the entire cable hanger, it is plastically deformed and cannot be reused. There is.

[0004] The present invention has been devised by focusing on such a current situation.

[0005]

A tool body detachably attached to a support is provided with a support rod and side rods vertically arranged on both sides of the support rod. A guide roller and a plurality of auxiliary rollers are rotatably mounted on the support rod portion, respectively, and a support cylinder whose inner peripheral surface is partially brought into contact with and separated from the outer peripheral surface of the auxiliary roller is connected to the auxiliary roller. To be rotatably supported.

[0006]

[Function] The cable placed on the receiving cylinder and pulled is
It moves smoothly by the rotation of the receiving cylinder. Even if the frictional resistance prevents smooth movement, the guide roller disposed inside the receiving cylinder rotates to increase the rotation of the receiving cylinder. Is smoothly carried out. In addition, the frictional resistance due to the tension (on a curved road) acting on the side rod portion of the tool body during the movement of the cable reduces the resistance as much as possible due to the presence of the guide roller.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway front view and FIG. 2 is a partially cutaway side view of an embodiment of a cable extension tool according to the present invention.

In the figure, reference numeral 1 denotes a main rod formed by bending a steel wire. Rod part 3,3
And an inclined rod portion 4, which is connected to an upper end of the side rod portions 3, 3.
4 is provided with hook-shaped hooking pieces 5 and 5 for hooking on the suspension line a, and the front support rod 2 of the main rod 1 is provided.
And a pair of auxiliary rollers 6 and 6 composed of bearings, which are rotatably mounted between the auxiliary rollers 6 and 6 and between the auxiliary roller 6 and the side rods 3 and 3. A spring 8 for holding the auxiliary rollers 6, 6 in a fixed position is wound around the supporting rod portion between the guide rollers 7, 7, respectively.

In the drawing, reference numeral 9 denotes a receiving cylinder in which an inner peripheral surface 9 'partially comes into contact with and separates from an outer peripheral surface 6' of the auxiliary roller 6, and the receiving cylinder 9 has a semicircular shape along the longitudinal direction. The ridges 10, 10 are juxtaposed along the circumferential side, and the left and right ends are provided with inclined flanges 11, 11 whose circumferential sides are inclined from the base toward the end. It is supported and is rotatably mounted on the front support rod 2 via the auxiliary rollers 6 and 6.

As described above, guide rollers 7,... Are rotatably mounted on the side rod portions 3, 3 of the main rod 1, and above the guide rollers 7, together with the guide rollers 7,. The clamping rollers 12, 12 are mounted on the side rods 3, 3, the base is rotatably mounted between the clamping rollers 12, 12 on one side rod, and the hook 13 at the tip is connected to the other one. A regulating rod 14 is disposed on the side rod so as to be detachably engaged with the side rod. The regulating rod 14 includes a group of guide rollers 7a,..., Similarly to the guide roller 7 disposed on the side rod 3 of the main rod 1. It is rotatably assembled.

Then, the hooks 5, 5 of the main rod 1 are hooked on the existing hanging wire a, and the extension tool A is provided at an appropriate distance from the hanging wire a (note that the hanging wire a is connected to the hanging wire a). Since the cable C 'may be suspended, the side rod portion 3 is arranged so that the newly installed cable C or Ca is arranged below the cable C'.
May be lengthened in the vertical direction, or the length of the inclined rod portion 4 may be increased as shown in the figure), or the cable C or Ca may be placed on the receiving cylinder 9 to perform a wire drawing (traction) operation. ,
The receiving cylinder 9 rotates to perform the operation smoothly.

The projecting ridges 10 are provided on the receiving support tube 9 because, for example, a cable (self-supporting type optical fiber cable) Ca is contacted by irregularities on the peripheral surface of the cable to contact the projecting ridges 10. This is because the rotation of the cylinder 9 is increased and the wire drawing operation is performed smoothly.

Therefore, it is not always necessary to provide the ridge 10.

The restricting rod 14 is provided to cope with a jumping-up phenomenon that occurs during cable extension work.
The arrangement of the guide rollers 7 is intended to facilitate the operation of extending the cable.

Further, the spring 8 is not always necessary for carrying out the present invention, and the reason for using the spring 8 is to reduce the cost by using an expensive bearing as the auxiliary roller 6 and to support the spring. Needless to say, bearings may be provided over the entire area including the side rods, and the auxiliary roller 6 may be formed of a synthetic resin roller.

In the embodiment, the present invention is applied to a single hanger body. However, a plurality of support rods are juxtaposed at intervals on the tool body, and each support rod is provided with a support cylinder. May be provided.

In the figure, reference numeral 15 denotes a caulking ring.

[0018]

[Effects of the Invention] Since the present invention has the same configuration as before, each of the auxiliary roller and the receiving support cylinder freely rotates, so that the frictional resistance generated when the cable is drawn is absorbed and the drawing work is smoothly performed. Can be done. In addition, since the guide roller is rotatably mounted on the side rod portion of the tool body, even if tension is applied to the side rod portion during cable pulling work, the presence of the guide roller reduces frictional resistance as much as possible. Therefore, there is no problem in using it on an extension line having some bends.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view.

FIG. 2 is a partially cutaway side view.

[Explanation of symbols]

 2 Supporting rod part 6 Auxiliary roller 9 Supporting cylinder

Claims (1)

(57) [Scope of request for utility model registration] A tool body detachably attached to a support is provided with a receiving rod and side rods vertically arranged on both sides of the receiving rod, and a guide roller is provided on the side rod. A plurality of auxiliary rollers are rotatably mounted on the support rod portion, and a support cylinder having an inner peripheral surface partially contacting and separating from the outer peripheral surface of the auxiliary roller is rotatable on the auxiliary roller. Cable extension tool supported by