JPS6350642Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a fastening tool used for fastening an optical fiber outdoor line to a telephone pole, a wall outside a house, etc.

<Prior art> Here, the optical fiber outdoor line 20 under consideration is
As shown in the cross-sectional view in FIG.
A so-called daruma-shaped structure is formed by integrally covering the optical fiber 22 with the optical fiber core wire 22a and the optical fiber 22 covered with the coating layer 22b with a plastic jacket 23 while maintaining an appropriate interval. This optical fiber outdoor line 20 has three parts when viewed from the outside.
That is, it is divided into an optical fiber cord section 24, a neck section 25, and a support line section 26.

When using a conventional tie-down device to span such an outdoor optical fiber line 20 via a utility pole 1, as shown in FIG. and the optical fiber cord portion 24 are separated at the neck portion 25, the support wire portion 26 and the optical fiber cord portion 24 are separated, and only the separated support wire portion 26 is attached to the L-shaped metal fitting 2 attached at a predetermined position on the utility pole 1. By winding it around a restraining device 4 attached to a hook, it was secured to a telephone pole or a wall outside the house via a hanging nail or a hook.

<Problems to be solved by the invention> In this case, since the support line part 26 is wrapped around the retainer 4, a difference in length occurs between the support line part 26 and the optical fiber cord part 24, and as a result, the optical fiber cord part 24 optical fiber core wire 22a becomes unstable and there is a risk of breakage, and the optical fiber cord portion 24
It became necessary to absorb the difference in length by bending it into an appropriate shape, which had the disadvantage of increasing the amount of attenuation.

In order to eliminate such drawbacks, the present invention makes it possible to fix the support line part of an outdoor optical fiber line to a tie-down tool without separating the support line part and the optical fiber cord part, thereby facilitating the tie-down work during outdoor line installation. This is intended to reduce the risk and improve reliability.

<Means for Solving the Problems> The structure of the present invention which eliminates the above-mentioned drawbacks is to arrange a pair of plate-shaped support wire gripping parts in such a way that the clamping surfaces of both support wire gripping parts face each other and can be moved toward and away from each other. In addition, a plurality of bolts provided along one side edge of the support line gripping part can be tightened freely, and a bolt is provided on both clamping surfaces of the support line gripping part on the opposite side parallel to the one side edge. It is characterized in that grooves extending along the other side edge located at the support line are provided to face each other, and a retaining member is fixed to one side of the support line gripping part.

<Examples> Examples of the present invention will be described below in detail based on the drawings.

Figures 3a and 3b show a retaining device 1 according to an embodiment of the present invention.
4 is shown. As shown in both figures, the pair of support line gripping parts 15, 15 are plate-shaped, and the gripping surfaces 15 of both
a and 15a face each other so that they can come into contact and separate. Three bolts 16 are provided along one side edge (the upper side in the drawing) of the support line gripping parts 15, 15, and the support line gripping parts 15, 15 are tightened by these bolts 16. Grooves 17, 17 extending along the other side edges (lower sides in the drawings) of the support line gripping parts 15, 15 are provided in the clamping surfaces 15a, 15a to face each other. Furthermore, a retaining member 7 made of hard steel wire and having a ring formed at the tip is fixed to one of the support wire gripping portions 15, and this retaining member 7 is approximately parallel to the grooves 17, 17. There is. In addition, there is a protrusion 1 in the groove 17.
There are multiple 8.

A manner in which the outdoor optical fiber line 20 is held down using the holding device 14 having such a configuration will be explained based on FIG. 2.

First, the retaining member 7 is engaged with the hook of the L-shaped metal fitting 12 at a predetermined position on the telephone pole 11, and the retaining member 14 is engaged with the hook of the L-shaped hardware 12.
Attach. At that time, the bolt 16 of the retainer 14
Loosen each one. Next, the support line part 26 of the optical fiber outdoor line 20 is held by the support line grip part 15,
15 into the grooves 17, 17, and tighten and fix with bolts 16. Since the support wire portion 26 is simply tightened with the bolt 16, there is a risk that the support wire may slip if an impact load is applied to a telephone pole, etc.
In order to prevent this, it is effective to provide several protrusions 18 in the groove 17 alternately on the left and right sides. After fixing the anchor 14 on one side, attach the anchor 14 to a nail or hook at a predetermined location such as a utility pole on the other side or a wall outside the house.
By pulling the optical fiber outdoor line 20 by hand and adjusting the slackness, simultaneously fixing the support line part 26 to the support line gripping parts 15, 15, it is possible to span any section.

In this way, if the retainer 14 of the present invention is used,
Since there is no difference between the support line part 26 and the optical fiber cord part 24 at the branching part or the tie-down part, there is no need to make any unnecessary bends in the optical fiber cord part 24. Since the optical fiber cord section 2 is integrated,
The fear of breakage of the optical fiber core wire 22a of No. 4 is also reduced, and great effects can be obtained from the viewpoints of transmission loss and reliability.

<Effects of the invention> As explained above, by using the anchoring device of the present invention, anchoring work can be performed without separating the support wire portion and the optical fiber cord portion, so it is possible to perform the anchoring work without separating the support wire portion and the optical fiber cord portion, so that the optical fiber core wire at the location where the anchoring device is used can be By reducing bends, transmission loss can be suppressed. Additionally, there is no need to worry about damaging or breaking the optical fiber by using a tool when separating the support wire from the optical fiber cord, improving reliability and reducing work. It is something.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a state in which an outdoor line is fixed to a utility pole using a conventional fastening device, and Fig. 2 is an explanatory diagram showing a state in which an outdoor line is similarly fixed using a fastening device of the present invention. 3a and 3b show the fastening device of the present invention, in which FIG. 3a is a perspective view, FIG. 3b is a sectional view of the bolt location, and FIG. In the drawing, 1 and 11 are utility poles, 2 and 12 are L-shaped metal fittings, 4 and 14 are retainers, 7 is a retaining member, 15 is a support wire gripping part, 15a is a clamping surface, 16 is a tightening bolt, and 17 is a 18 is a groove, 20 is an optical fiber outdoor wire, 24 is an optical fiber cord wire, and 26 is a support wire portion.

Claims (1)

[Claim for Utility Model Registration] A pair of plate-shaped support line gripping parts are arranged so that the clamping surfaces of both support line gripping parts face each other and can be moved toward and away from each other.
A plurality of bolts provided along one side edge of the support line gripping part can be tightened freely, and bolts located parallel to and opposite to the one side edge are provided on both clamping surfaces of the support line gripping part. A retaining device characterized in that grooves extending along the other side edges of the supporting wire gripping portion are provided facing each other, and a retaining member is fixed to one side of the support wire gripping portion.