JPH10248149A - Gripping metal for composite fiber optic overhead ground wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grip a composite fiber optic overhead ground wire of different diameters using a one kind of gripping metal by employing an arcuate groove part having a diameter larger than the maximum diameter of composite fiber optic overhead ground wire in a receiving metal and a retaining metal. SOLUTION: The grip metal for composite fiber optic overhead ground wire comprises a metal 11 provided with a groove 10 receiving a composite fiber optic overhead ground wire, a retaining metal 21 having a groove 20 for retaining a composite fiber optic overhead ground wire received in the groove 10, a bolt 30 for tightening the receiving metal 11 and the retaining metal 21, and a nut 31 to be screwed over the fixing nut 30. An arcuate groove part having a diameter larger than the maximum diameter of a plurality of composite fiber optic overhead ground wires of different diameter to be gripped is employed as the grooves 10, 20 in the receiving metal 11 and the retaining metal 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a holding fixture for an optical fiber composite overhead ground wire.

[0002]

2. Description of the Related Art In general, an optical fiber composite overhead ground wire in which an optical fiber cable is accommodated in an overhead ground wire is installed at the top of a steel tower.
The optical fiber cables are connected to each other at the position of the steel tower on the way. To connect the optical fiber cables to each other, the optical fiber cables are pulled down to a connection box attached to a steel tower, guided into the connection box, and connected in the connection box. The optical fiber composite overhead ground wire pulled down from the top of the tower to the connection box in this manner is usually provided at predetermined intervals (for example, 1.5 m to 2 m) for the purpose of preventing vibration and deformation of the connection box introduction part. (Every .0 m), the optical fiber composite overhead ground wire is gripped by the gripping hardware and retained by the steel tower.

As shown in FIG. 4, a conventional holding fixture for an optical fiber composite overhead ground wire includes a receiving fitting 11 having a receiving groove 10 for receiving an optical fiber composite overhead ground wire, and a receiving groove 10.
And a holding bolt 21 for holding the optical fiber composite overhead ground wire 1 located at a position, and a receiving bolt 11 and a fixing bolt 30 for tightening and fixing the holding metal 21. The receiving groove 10 and the holding groove 20 is
The circumferential groove had the same size as the diameter of the optical fiber composite ground wire to be gripped. Note that in FIG.
Indicates a nut screwed to the fixing bolt 30.

[0004]

However, as described above, in the case where the receiving groove 10 and the holding groove 20 are formed in an arc-shaped groove having the same size as the diameter of the optical fiber composite overhead ground wire to be gripped, Each time the diameter of the optical fiber composite overhead ground wire to be gripped is different, it is necessary to manufacture an optical fiber composite overhead ground wire holding metal fitting adapted to the optical fiber composite overhead ground wire, which is troublesome. , There is a problem that it becomes expensive. That is, the holding fixture for the optical fiber composite overhead ground wire is made of an aluminum-based casting, and a wooden mold or a mold is required for the production, and these are manufactured each time the diameter of the optical fiber composite overhead ground wire is different. Things are very cumbersome and expensive.

[0005]

SUMMARY OF THE INVENTION The present invention provides an optical fiber composite overhead ground wire holding bracket which solves the above-mentioned problems, and has a receiving groove portion for receiving an optical fiber composite overhead ground wire. An optical fiber composite overhead ground wire grip comprising: a receiving metal provided, a holding metal provided with a holding groove for holding the optical fiber composite overhead ground wire located in the receiving groove, and a fixing bolt for tightening and fixing the receiving metal and the holding metal. In the metal fitting, the receiving groove part of the receiving metal part and the holding groove part of the holding metal part may be an arc-shaped groove part having a diameter larger than the maximum diameter of the optical fiber composite overhead ground wire having a plurality of different diameters to be gripped. It is a feature (claim 1).

Further, an elastic member is arranged between the receiving fitting and the holding fitting (claim 2).

Further, a push bolt is attached to the back of the receiving groove of the receiving fitting or the holding groove of the holding fitting, and the receiving groove of the receiving fitting or the holding groove of the holding fitting is tightened by the pushing bolt. (Claim 3).

According to the first aspect of the present invention, the receiving groove of the receiving member and the pressing groove of the pressing member are larger than the maximum diameter of the plurality of optical fiber composite ground wires having different diameters to be gripped. By forming the arc-shaped groove portion with a diameter, from the optical fiber composite overhead ground wire having the maximum diameter to the optical fiber composite overhead ground wire having a small diameter, the optical fiber composite overhead ground wire having various diameters can be gripped with one type of gripping metal. it can. Therefore, it is not necessary to manufacture a holding metal fitting every time the diameter of the optical fiber composite overhead ground wire changes.

Further, by disposing an elastic member between the receiving fitting and the holding fitting as in the invention according to claim 2, excessive tightening of the optical fiber composite overhead ground wire located in the receiving groove and the holding groove is performed. The force can be prevented from acting.

[0010] Further, as in the third aspect of the present invention, a push bolt is attached to the back of the receiving groove of the receiving bracket or the pressing groove of the holding metal, and the receiving bolt of the receiving bracket or the pressing groove of the holding metal is tightened with the pressing bolt. With this configuration, the tightening force of the optical fiber composite overhead ground wire located in the receiving groove and the holding groove can be easily adjusted.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of an optical fiber composite overhead ground wire holding bracket according to the present invention,
The holding fitting for an optical fiber composite overhead ground wire is a receiving fitting 1 having a receiving groove 10 for receiving the optical fiber composite overhead ground wire.
1 and a holding metal 21 having a holding groove 20 for holding the optical fiber composite overhead ground wire 1 located in the receiving groove 10.
And a fixing bolt 30 for tightening and fixing the receiving metal 11 and the holding metal 21, and a nut 31 screwed to the fixing bolt 30. Receiving groove 10 and holding metal 21
Is characterized in that it is an arc-shaped groove having a diameter larger than the maximum diameter of the optical fiber composite overhead ground wire 1 having a plurality of different diameters to be gripped.

That is, the receiving groove 10 and the holding groove 20 have a maximum diameter d (mm) of the optical fiber composite overhead ground wire 1 having a plurality of different diameters to be gripped.
In the case of, it is an arc-shaped groove having a diameter D (mm) larger than d (mm). The depth of each of the grooves 10 and 20 is D
/ 2 (mm) or less.

As described above, the receiving groove 10 and the holding groove 20 are arc-shaped grooves having a diameter larger than the maximum diameter of the optical fiber composite overhead ground wire 1 having a plurality of different diameters to be gripped. Accordingly, the optical fiber composite overhead ground wire having various diameters can be gripped by one type of gripping metal.

FIG. 2 shows another embodiment of the present invention, which is different from the above-described embodiment in that an elastic member 50 is arranged between the receiving metal member 11 and the holding metal member 21.
The elastic member 50 is mounted at the position of the fixing bolt 30, that is, with the fixing bolt 30 penetrating the elastic member 50. As the elastic member 50, a spring washer, a coil spring, a hard rubber, or the like can be used. In FIG. 2, the same parts as those in FIG.

When the optical fiber composite overhead ground wire 1 is gripped to hold the optical fiber composite overhead ground wire 1, the elastic member 50
Acts to repel the tightening force of the optical fiber composite overhead ground wire 1 located in the receiving groove portion 10 and the holding groove portion 20, so that an excessive tightening force can be prevented from being applied.

FIG. 3 shows still another embodiment of the present invention. The difference from the above embodiment is that
The pressing bolt 60 is attached to the back of the holding groove 20 of the first embodiment, and the holding groove 20 of the holding member 21 is tightened by the pressing bolt 60. In FIG. 3, the same parts as those in FIG.

As described above, the push bolt 60 is attached to the back of the holding groove 20 of the holding metal member 21, and the push bolt 6 is attached.
If the holding groove 20 of the holding metal 21 is tightened at 0, the tightening force of the optical fiber composite overhead ground wire located in the receiving groove 10 and the holding groove 20 can be easily adjusted. In particular, when there are a plurality of receiving grooves 10 and a plurality of holding grooves 20, there is an advantage that the tightening force can be individually adjusted. The push bolt 60 is provided in the receiving groove 1.
It may be provided on the 0 side.

In each of the above embodiments, the case where there are two receiving grooves 10 and two holding grooves 20 has been described. However, the number of receiving grooves 10 and holding grooves 20 is one, or three or more. Is also good. If a cushion material such as rubber or plastic is attached to the surface position of the receiving groove 10 and the holding groove 20, there is an advantage that damage to the optical fiber composite overhead ground wire can be prevented.

[0019]

As described above, the holding bracket for an optical fiber composite overhead ground wire according to the present invention comprises a receiving bracket having a receiving groove for receiving an optical fiber composite overhead ground wire, and an optical fiber composite located in the receiving groove. In a holding fitting for an optical fiber composite overhead ground wire comprising a holding metal provided with a holding groove for holding an overhead ground wire, and a fixing bolt for tightening and fixing the holding metal, the holding groove of the holding metal and holding of the holding metal. Since the groove portion is an arc-shaped groove portion having a diameter larger than the maximum diameter of the optical fiber composite overhead ground wire having a plurality of different diameters to be grasped, the optical fiber composite The overhead ground wire can be gripped by one type of gripping hardware. Therefore, there is no need to manufacture a gripping metal every time the diameter of the optical fiber composite overhead ground wire changes, and it is possible to manufacture it at low cost.

Further, since the elastic member is arranged between the receiving fitting and the holding fitting, it is possible to prevent an excessive tightening force from acting on the optical fiber composite overhead ground wire located in the receiving groove and the holding groove.

Further, a push bolt is attached to the back of the receiving groove of the receiving fitting or the holding groove of the holding fitting, and the receiving groove of the receiving fitting or the holding groove of the holding fitting is tightened by the pushing bolt. The fastening force of the optical fiber composite overhead ground wire located in the holding groove can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an optical fiber composite overhead ground wire holding bracket according to the present invention.

FIG. 2 is a front view showing another embodiment of the present invention.

FIG. 3 is a front view showing still another embodiment of the present invention.

FIG. 4 is a front view showing an embodiment of a conventional gripping fitting for an optical fiber composite overhead ground wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical fiber composite overhead ground wire 10 Receiving groove part 11 Receiving metal part 20 Holding groove part 21 Holding metal part 30 Fixing bolt 31 Nut 50 Elastic member 60 Push bolt

Claims (3)

[Claims] 1. A receiving metal fitting having a receiving groove for receiving an optical fiber composite overhead ground wire, a holding metal having a holding groove for holding the optical fiber composite overhead ground wire positioned in the receiving groove, and a receiving metal fitting and a holding metal fitting. An optical fiber composite overhead ground wire gripping fixture comprising a fixing bolt for tightening and fixing, wherein the receiving groove portion of the receiving metal fitting and the holding groove portion of the holding metal fitting are formed of a plurality of optical fiber composite overhead ground wires having different diameters to be gripped. An optical fiber composite overhead ground wire gripping metal fitting having an arc-shaped groove having a diameter larger than the maximum diameter of the above. 2. An optical fiber composite overhead ground wire gripping metal according to claim 1, wherein an elastic member is arranged between the receiving metal and the holding metal. 3. A pressing bolt is mounted behind the receiving groove of the receiving member or the holding groove of the holding member, and the receiving groove of the receiving member or the holding groove of the holding member is tightened by the pressing bolt. The holding bracket for an optical fiber composite overhead ground wire according to claim 1.