JP2001201652A - Tension member fixing device for multiple optical cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tension member fixing device for a multiple optical cable capable of firmly fixing the tension member for the multiple optical cable and moreover excellent in workability in the case of fixing the tension member. SOLUTION: Respective leg parts 5a, 6a of a pair of fixing members 5, 6 whose cross sections are formed into a nearly U shape are faced each other, the tension member 7a of the multiple optical cable 7 is inserted into nearly V shaped notches 5b, 6b formed in the leg parts 5a, 6a to hold the tension member 7a between respective fixing members 5, 6 and also a fixture 3 inserted into attaching holes 5c, 6c opened in both end sides of respective fixing members 5, 6 is screwed into the boss 2 of a fixing device main body 1. Whereby, the tension member 7a is fixed to the fixing device main body 1. Since the tension member 7a is held and fixed by the nearly V shaped notches 5b, 6b formed in the leg parts 5a, 6a, the tension member 7a is surely fixed, stable fixing force is obtained even if the diameter of the tension member 7a is varied, and this device is allowed to cope with the tension members 7a having various diameters.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension member fixing device for fixing a tension member of a multi-core optical cable used for optical communication.

[0002]

2. Description of the Related Art Conventionally, a multi-core optical cable used for optical communication is provided with a tension member for preventing a tension (tension) due to the weight of the cable from being directly applied to an optical fiber. ,
This tension member is fixed by a fixing device.

As a conventional tension member fixing device, one having a structure shown in FIG. 7 or FIG. 8 is used.

In the tension member fixing device shown in FIG. 7, a pair of fixing members a and b having a U-shaped cross section are back-to-back, and a tension member d of a multi-core optical cable c is sandwiched between these fixing members a and b. A fixing tool f such as a screw inserted into a mounting hole e opened at both ends of each of the fixing members a and b is attached to a boss h provided on the fixing device body g.
The tension member d is fixed to the fixing device body g by screwing it into the screw hole i.

On the other hand, a tension member fixing device shown in FIG. 8 has a multi-core structure between a fixing member b having a U-shaped cross section and a fixing member j in which a semi-cylindrical fixing portion k is bulged in a part of a flat plate. A fixing member f, which clamps the tension member d of the optical cable c and is inserted into mounting holes e opened at both ends of each fixing member b, j, is attached to a boss h standing upright on the fixing device body g.
The tension member d is fixed to the fixing device body g by screwing it into the screw hole i.

[0006]

However, in the tension member fixing device shown in FIG. 7, when the fixing member f is strongly tightened, the tension member d is crushed and the strength is remarkably reduced, so that a large tension acts on the tension member d. When the fastening member f is weakened to prevent the tension member d from being cut, the fixing members a,
There is a problem that the tension member d comes off from during b.

Further, since the fixing members a and b having the U-shaped cross section are back-to-back and the tension member d is sandwiched between the fixing members a and b, the fixing members a and b are fixed.
When the tension member d is pinched between the members, the position of the tension member d is shifted without being determined, and thus there is a problem such as poor workability.

On the other hand, in the tension member fixing device shown in FIG. 8, if the radius of the semi-cylindrical fixing portion k formed on the flat fixing member j does not match the diameter of the tension member d, the tension member is fixed when tightened. There is a problem that a gap is generated between the portion k and the tension member d, the tightening force is reduced, and the tension member d comes off. In order to prevent such a problem, it is fixed according to the diameter of the tension member d. It is necessary to manufacture a plurality of fixing members j each having the portion k, and the number of types of the fixing members j increases, resulting in poor workability and increased costs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is an apparatus for fixing a tension member of a multi-core optical cable which can firmly fix the tension member of the multi-core optical cable and has good workability at the time of fixing. The purpose is to provide.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a pair of fixing members having a substantially U-shaped cross section, each leg of which faces each other, and a substantially V-shaped portion formed on the leg. A fixing member inserted into a notch of a letter shape, inserting the tension member of the multi-core optical cable, clamping the tension member between the fixing members, and inserting into the mounting holes opened at both ends of the fixing members. Is screwed into a boss of the fixing device main body, thereby fixing the tension member to the fixing device main body.

According to the above configuration, the tension member is firmly fixed between the fixing members, so that the tension member does not come off, and when the tension member is fixed, the position of the tension member is shifted due to the notch. Since there is no such member, the workability is very good, for example, the tension member can be fixed at a predetermined position in a short time.

[0012] In order to achieve the above object, the present invention also provides a fixing member in which the distance between one leg is smaller than the distance between the other legs, so that the leg of one fixing member is connected to the leg of the other fixing member. It is fitted between the parts.

According to the above configuration, even if the diameter of the tension member changes, a stable fixing force can be obtained, and the tension member having various diameters can be used, so that the versatility is improved.

[0014] To achieve the above object, the present invention further provides:
A cutout is provided at substantially the center of each leg of the fixing member.

[0015] Since the above-described configuration maintains the compatibility of the fixing members in the left-right direction, the tension members can be fixed by combining the fixing members without worrying about the left-right direction of the fixing members. The performance is further improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS.

FIG. 1 is an exploded perspective view showing a tension member fixing device, FIG. 2 is a front view showing a state in which the tension member is fixed, and FIG. 3 is a side view thereof.

In these figures, reference numeral 1 denotes a fixing device main body, in which a pair of bosses 2 are erected on a flat chassis 1a with an interval L, and screw holes 2a are formed on the upper surfaces of these bosses 2.
Are drilled.

A fixing tool 3 such as a screw is attached to these bosses 2.
The fixing means 4 is attached.

The fixing means 4 is composed of a pair of fixing members 5 and 6 having a substantially U-shaped cross section. The distance between the legs 5a of the upper fixing member 5 is equal to that of the lower fixing member 6. It is slightly narrower than the interval between the portions 6a, and the upper fixing member 5
3 can be fitted between the legs 6a of the lower fixing member 6 as shown in FIG.

A substantially V-shaped notch 5b, 6b is formed at the center of the distal end of the leg 5a, 6a of each of the fixing members 5, 6, and a multi-core optical cable 7 is provided between these notches 5b, 6b. The tension member 7a can be pinched.

As shown in FIG. 1, the multi-core optical cable 7 is formed by covering a plurality of optical fibers 7b with a coating 7c. At the center of each optical fiber 7b, a tension due to the weight of the multi-core optical cable 7 is supported. A tension member 7a for preventing tension from acting on each optical fiber 7b is provided. When the multi-core optical cable 7 is fixed, the tension member 7a is fixed to the fixing device body 1.

On the other hand, a pair of mounting holes 5c and 6c are opened at substantially the same positions on both ends of each of the fixing members 5 and 6.

The mounting holes 5c and 6c are formed in the screw holes 2a of the boss 2 erected on the chassis 1a of the fixing device main body 1.
And the mounting holes 5c, 6c
Can be screwed into the screw holes 2a of the respective bosses 2.

Next, the operation of the tension member fixing device constructed as described above will be described. When fixing, for example, a terminal of the multi-core optical cable 7, first, as shown in FIG. The tension members 7a of the multi-core optical cable 7 are notch 5b formed in the legs 5a, 6a.
6b, and the two are fitted so that the leg 5a of the upper fixing member 5 is located between the legs 6a of the lower fixing member 6.

Next, in this state, the fastener 3 inserted into the mounting holes 5c, 6c of the fixing members 5, 6 is screwed into the screw hole 2a of the boss 2.
The tension member 7a is sandwiched and fixed between the notches 5c, 6c of the fixing members 5, 6 by screwing into the fixing member 5, and when fixing the tension member 7a,
Since the notches 5c and 6c position the tension member 7a, the position of the tension member 7a does not shift during the operation, and the tension member 7a can be fixed in a short time, so that the workability is very good.

The tension member 7a is fixed by the substantially V-shaped notches 5b, 6b formed in the legs 5a, 6a of the fixing members 5, 6, so that the tension member 7a is fixed.
Even if the diameter changes, a stable fixing force can be obtained, and the tension member 7a having various diameters can be accommodated, so that the versatility is also improved.

In the above embodiment, the distance between the legs 5a of the upper fixing member 6 is made smaller than the distance between the legs 6a of the lower fixing member 6, so that the legs 5a of the upper fixing member 5 are fixed on the lower side. Although fitted between the legs 6a of the member 6, the distance between the legs 5a of the upper fixing member 5 is changed as in the modified examples shown in FIGS.
The distance between the legs 6a of the lower fixing member 6 may be wider than that of the lower fixing member 6, and the legs 6a of the lower fixing member 6 may be fitted to the legs 5a of the upper fixing member 5.

[0029]

As described above in detail, the present invention has a pair of fixing members each having a substantially U-shaped cross section with their legs facing each other, and a substantially V-shaped notch formed in each of the legs. Then, the tension member of the multi-core optical cable is inserted, the tension member is sandwiched between the fixing members, and the fixing tool inserted into the mounting holes opened at both ends of each fixing member is fixed to the fixing device. Since the tension member is fixed to the fixing device main body by screwing into the boss of the main body, the tension member is firmly fixed between the fixing members, so that the tension member does not come off. In addition, when fixing the tension member, the position of the tension member does not shift due to the notch, so that the tension member can be Or the like can be a constant, very good in workability.

The distance between one leg of the fixing member is smaller than the distance between the other legs, and the leg of one fixing member is fitted between the legs of the other fixing member. Even if the diameter of the member changes, a stable fixing force can be obtained and tension members of various diameters can be accommodated, so versatility is improved and multiple types of fixing members are manufactured according to the diameter of the tension member. Since there is no need, the cost can be reduced.

Further, since the notch is provided at substantially the center of each leg of the fixing member, the compatibility of the fixing member in the left-right direction is maintained, so that each fixing member can be fixed without worrying about the left-right direction of the fixing member. The tension member can be fixed by combining the members, thereby further improving workability.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a fixing device for a multi-core optical cable according to an embodiment of the present invention.

FIG. 2 is a front view showing a state where the tension member is fixed by the multi-core optical cable fixing device according to the embodiment of the present invention.

FIG. 3 is a side view showing a state where the tension member is fixed by the multi-core optical cable fixing device according to the embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a modified example of the multi-core optical cable fixing device according to the embodiment of the present invention.

FIG. 5 is a front view of a state in which a tension member is fixed by a modified example of the multi-core optical cable fixing device according to the embodiment of the present invention.

FIG. 6 is a side view showing a state in which a tension member is fixed by a modified example of the multi-core optical cable fixing device according to the embodiment of the present invention.

FIG. 7A is an exploded perspective view showing a conventional tension member fixing device for a multi-core optical cable. (B) It is a front view of the state where the tension member was fixed by the conventional tension member fixing device of the multi-core optical cable. (C) A side view of a state in which a tension member is fixed by a conventional multi-core optical cable tension member fixing device.

FIG. 8A is an exploded perspective view showing a conventional tension member fixing device for a multi-core optical cable. (B) It is a front view of the state where the tension member was fixed by the conventional tension member fixing device of the multi-core optical cable. (C) A side view of a state in which a tension member is fixed by a conventional multi-core optical cable tension member fixing device.

[Explanation of symbols]

 Reference Signs List 1 fixing device main body 1a chassis 2 boss 2a screw hole 3 fixing tool 4 fixing means 5 fixing member 5a leg 5b notch 5c mounting hole 6 fixing member 6a leg 6b notch 6c mounting hole 7 multi-core optical cable 7a tension member 7b optical fiber 7c coating

Claims (3)

[Claims] 1. A leg member of a pair of fixing members having a substantially U-shaped cross section is opposed to each other, and a tension member of a multi-core optical cable is inserted into a substantially V-shaped notch formed in said leg portion. Then, while holding the tension member between the fixing members, by screwing the fixing tool inserted into the mounting holes opened at both ends of the fixing members, by screwing into the boss of the fixing device body, A tension member fixing device for a multi-core optical cable, wherein the tension member is fixed to the fixing device main body. 2. The distance between one leg of the fixing member is smaller than the distance between the other legs, and the leg of one fixing member is fitted between the legs of the other fixing member. The tension member fixing device for a multi-core optical cable according to claim 1. 3. The tension member fixing device for a multi-core optical cable according to claim 1, wherein a notch is formed substantially at the center of each leg of the fixing member.