JPH10332953A - Cable fixing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable fixing tool which facilitates the fixation of a tension-member containing less-core optical cable. SOLUTION: This tool consists of a wedgelike clamp 11 having tapered surfaces 21 as the outside surfaces of two members 15A and 14B clamping the cable 1 and a fixed block 13 which has tapered surfaces 29 corresponding to the tapered surfaces 21 of the wedgelike clamp 11; and the tapered surfaces 29 of the fixed block 13 are formed in a saw-tooh uneven shape 29a which is hardly caught when the wedgelike clamp 11 is moved forward, but easily caught when backward and claw parts 27 which are caught by the saw-tooth uneven shape 29a are formed on the tapered surfaces 21 of the wedgelike clamp 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable fixing device suitable for fixing a small-fiber optical cable or the like containing a tension member to an outdoor termination cabinet or a closet.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a small-fiber optical cable containing a tension member. In this cable 1, an optical fiber core wire 3 is arranged between two tension members 5, and a flat collective coating 7 is applied to the outer periphery thereof, and a position corresponding to the optical fiber core wire 3 on the outer peripheral surface of the collective coating 7 is provided. In which a groove 9 is formed.

Conventionally, when this kind of cable is drawn into an outdoor termination cabinet or a rosette and fixed,
After tearing the coating 7 along the groove 9 and exposing the optical fiber core 3 to a required length, the tension member 5 was fixed to a part of a cabinet or a closet by screwing or the like.

[0004]

However, in such a fixing method, the operation of fixing the cable is troublesome. Therefore, an object of the present invention is to provide a cable fixing device that can easily fix a cable.

[0005]

According to the present invention, there is provided a cable fixing device comprising: a wedge-shaped clamp in which the outer surfaces of two members for holding a cable are tapered; A fixed block whose inner surface is a tapered surface corresponding to the tapered surface of the wedge-shaped clamp, and at least one of the opposing tapered surfaces inside the fixed block has Saw-toothed irregularities that are difficult to catch but are easy to catch when retracted are formed, and on the tapered surface of the wedge-shaped clamp, a claw portion that is hooked to the saw-toothed unevenness is formed. is there.

In the wedge-type clamp of the cable fixing device of the present invention, by providing a fitting portion for fitting the other member into one member, the two members are relatively displaced in the cable direction in a state where the two members grip the cable. It is preferable to adopt a configuration that does not have such a configuration.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the cable fixing device of the present invention includes a wedge-shaped clamp 11 for holding the cable 1 and a fixing block 13 fixed to an outdoor termination cabinet or a closet (not shown). The wedge-shaped clamp 11 and the fixed block 13 are plastic moldings.

As shown in FIGS. 2 and 3, the wedge-shaped clamp 11 has two members 15A for holding the cable 1,
15B are connected by a band 17. Two members 1
5A and 15B are each formed to have a concave cross section, a surface corresponding to a bottom surface inside the concave shape is a cable gripping surface 19, and a surface corresponding to a bottom surface outside the concave shape is a taper surface 21. The cable gripping surface 19 is formed with irregularities 19a for preventing the cable 1 from slipping.

The one member 15A is longer than the other member 15B and has thicker side walls, and the other member 15B is provided inside the both side walls of the one member 15A.
Are formed with fitting recesses 23 into which both side walls are fitted. An elastic tongue 25 is formed on the rear end side of one of the members 15A in the direction of the tapered surface 21, and a claw portion 27 projecting from the tapered surface 21 is formed on the outer surface of the elastic tongue 25.

On the other hand, the fixed block 13 is shown in FIGS.
As shown in FIG. 5, the inner side surfaces are tapered surfaces 29 corresponding to the tapered surfaces 21 of the wedge-shaped clamp 11. Then, the wedge-shaped clamp 11 is advanced (toward the tip) on the tapered surface 29.
Are formed, and the saw-toothed irregularities 29a which are hard to be caught by, but are easily caught by the retreat are formed. Serrated irregularities 2
The direction of the ridges and ridges of 9a is a fixed block 13 having a concave cross section.
In the depth direction.

Next, a method of using the cable fixing device will be described. The fixing block 13 is fixed to a predetermined position of an outdoor termination cabinet or a rosette in advance. First, the cable 1 is disposed between the two members 15A and 15B of the wedge-shaped clamp 11, and the two side walls of the other member 15B are fitted into the fitting recess 23 of one member 15A. The cable 1 is sandwiched between 15A and 15B (FIG. 3). In this state, after inserting the wedge-shaped clamp 11 between the tapered surfaces 29 of the fixed block 13, the wedge-shaped clamp 11 is pushed forward in the fixed block 13 by a finger. Then, the wedge-shaped clamp 11 is pushed by the tapered surface 29 of the fixed block 13 to strongly grip the cable 1. At this time, since the two members 15A and 15B are fitted to each other, they do not relatively shift in the cable direction.

When the finger is released after the wedge-shaped clamp 11 has been pushed to the point where it will not advance any further, the claw portion 27 of the wedge-shaped clamp 11 has the serrated irregularities 29a of the fixed block 13.
As a result, the wedge-shaped clamp 11 cannot be retracted, and the state in which the cable 1 is firmly gripped (fixed state) is maintained. Thereafter, when it becomes necessary to release the fixing of the cable 1, the wedge-shaped clamp 11 may be pulled upward from the fixing block 13 by pinching the band portion 17.

In the above-described embodiment, the serrated irregularities 29a are formed on both of the opposed tapered surfaces 29 of the fixed block 13. However, the serrated irregularities 29a are opposed to the claw portions 27 of the wedge-shaped clamp 11, respectively. It can be formed on only one of the tapered surfaces 29. This makes it easier to process parts. When the serrated unevenness 29a is formed on both of the opposed tapered surfaces 29 of the fixed block 13, the claw pieces 27 may be formed on both of the two members 15A and 15B of the wedge-shaped clamp 11. Also, two members 15
The outer tapered surfaces of A and 15B may have a form in which one surface is parallel to the cable and the other surface is inclined with respect to the cable. In that case, the tapered surface inside the fixed block 13 is also formed in the same form.

[0014]

As described above, by using the cable fixing device of the present invention, the cable can be fixed extremely easily, and the cable fixing operation can be performed efficiently in a short time.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a cable fixing device according to the present invention.

2 (A) is a sectional view, FIG. 2 (B) is a front view, and FIG. 2 (C) is a developed view of a wedge type clamp constituting the cable fixing device of FIG.

FIG. 3 is a front view showing a state where the cable is gripped by the wedge-type clamp of FIG. 2;

4A is a plan view and FIG. 4B is a front view of a fixing block constituting the cable fixing device of FIG. 1;

FIG. 5 is a sectional view taken along line aa of FIG. 4;

FIG. 6 is a sectional view showing an example of a cable fixed by the cable fixing device of the present invention.

[Explanation of symbols]

 1: Cable 3: Optical fiber core wire 5: Tension member 7: Coating 9: Groove 11: Wedge clamp 13: Fixed block 15A, 15B: Two members 17: Band 19: Cable gripping surface 21: Tapered surface 23: Fitting recess 25: Elastic tongue 27: Claw 29: Tapered surface 29a: Serrated unevenness

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Shino, Inventor, Nippon Telegraph and Telephone Corporation 3-9-1-2, Nishishinjuku, Shinjuku-ku, Tokyo (72) Hiroki Fukuroi 5-23-8, Nishigotanda, Shinagawa-ku, Tokyo (72) Inventor Etsuo Tanabe 5-23-8 Nishigotanda, Shinagawa-ku, Tokyo In-house Seiden Co., Ltd.

Claims (2)

[Claims] The two members (1) for holding a cable (1).
5A, 15B) have a tapered surface (21) on the outer surface and a wedge-shaped clamp (11), and a tapered surface (21) having a concave cross section and inner surfaces of both side walls corresponding to the tapered surface (21) of the wedge-shaped clamp. 29), and at least one of the opposed tapered surfaces (29) inside the fixed block (13) is caught by the advance of the wedge-shaped clamp (11). Sawtooth irregularities (2
9a) is formed, and a claw (27) is formed on the tapered surface (21) of the wedge-shaped clamp so as to be hooked on the saw-toothed unevenness (29a). 2. The wedge-type clamp (11) is provided with a fitting portion (23) for fitting the other member (15B) into the one member (15A), so that the two members (15A, 1A) are provided.
5. The cable fixing device according to claim 1, wherein the cable fixing member does not relatively shift in a cable direction when the cable is gripped. 5.