JPH0449602Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an overhead wiring fitting for optical fiber cables.

[Conventional technology]

Optical fiber cable C is usually 1 km long, and is connected to a utility pole P as shown in Figure 2.
The overhead wiring is carried out along the messenger wire W stretched over the ground.

In the above-mentioned connection, an extra length is generally provided in consideration of future accidents, and for example, an extra length C1 is provided, which is wound three to four times in a circle with a diameter of about 90 cm every 1 km.

Conventionally, as shown in FIG. It is common to arrange the extra length C1 and fix it at several locations in the circumferential direction with filaments 3 or the like.

[Problem to be solved by the invention] However, in the above-mentioned conventional device, the circular extra length portion C1 is located near the utility pole P, so a worker who is performing other wiring work on the utility pole may inadvertently touch it. There is a risk of being caught on or stepped on, and since optical fiber cables are bundles of glass fibers, they are easily damaged and may break.

The present invention was proposed in view of the above-mentioned conventional problems, and it is possible to easily and reliably mount and support the wiring section and extra length section of the above-mentioned optical fiber cable in a position where workers will not touch it carelessly. The purpose of the present invention is to provide metal fittings for overhead wiring.

[Means to solve the problem]

In order to achieve the above object, the overhead wiring fitting according to the present invention has the following configuration.

That is, the optical fiber cable C is wired overhead at a distance from the utility pole P to approximately the tip of the arm 13 provided on the side of the utility pole P so as to protrude in a substantially horizontal direction, and is attached to the tip of the arm 13. Support members 11, 15
A further feature is that the circular extra length C1 of the optical fiber cable C is fixed and held by supports 10 at a plurality of locations in the circumferential direction.

[Effect]

As described above, the optical fiber cable C is overhead wired at a distance from the utility pole P to approximately the tip of the arm 13 provided on the side of the utility pole P in a substantially horizontal direction. By attaching and holding the circular extra length portion C1 of the optical fiber cable C to the supporting members 11 and 15 attached to the tip portion using the support 10, the wiring portion and extra length of the optical fiber cable C can be fixed. It becomes possible to easily and reliably hold the portion C1 at a position sufficiently separated from the telephone pole.

〔Example〕

In the embodiment shown in the figure, a messenger wire W is stretched approximately at the tip of an arm member 13 provided to protrude approximately horizontally from a utility pole P, and an optical fiber cable C is installed along the wire W. With overhead wiring,
The wiring part is arranged at a position sufficiently separated from the telephone pole P. In the figure, reference numeral 16 indicates a messenger wire retaining fitting fixed to the arm member 13 by welding or the like, 17 indicates a retaining roll, and 18 indicates a hanger.

Further, a support member 11 in the vertical direction is attached to the tip of the arm member 13, and the support member 11
A lateral support member 15 is attached to the central part of the frame via an arm member 14, and a circular extra length C1 of the optical fiber cable C is attached to both support members 11 and 15 using supports 10 at three locations in the circumferential direction. It was supported.

In the illustrated example, a U-shaped elastic clamp is used as the support 10, and the support members 11, 1
It is inserted into the mount hole No. 5 and locked. The number of supports 10 may be determined as appropriate, but three-point support as in the embodiment is almost sufficient.

Further, in the illustrated example, the support member 11 is attached to the tip of the arm member 13 so as to be inclined downward and gradually away from the utility pole P as it goes downward, but it may be attached substantially parallel to the utility pole P. Alternatively, it may be attached upward to the tip of the arm member 13.
Furthermore, the lateral support member 15 may be attached directly to the support member 11 without using the arm member 14.

[Effect of idea]

As explained above, in the present invention, the optical fiber cable C is overhead wired approximately at the tip of the arm 13 that is provided to protrude in a substantially horizontal direction with respect to the utility pole P, and Since the extra length portion C1 of the optical fiber cable C is attached and held on the attached support members 11 and 15, the wiring portion and extra length portion C1 of the optical fiber cable C are placed at a position sufficiently apart from the telephone pole. This makes it possible to prevent the cable from bending or breaking due to a worker accidentally hooking his or her hand or stepping on the optical fiber cable C, unlike the conventional method. can.

Further, since the circular extra length C1 of the optical fiber cable C is held by the supporting members 11 and 15 attached to the tip of the overhead wiring arm 13 as described above, the extra length C1 is held. There is no need to separately attach members etc. to the utility pole P, and since it is only necessary to fix multiple locations in the circumferential direction of the circular extra length portion C1 with the support 10, it is possible to attach and support it extremely easily and reliably. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of an overhead wiring fitting for an optical fiber cable according to the present invention, and FIG. 2 is a perspective view of a conventional overhead wiring fitting. 10 is a support, 11 and 15 are support members, 12 is a utility pole band, 13 is an arm member, C is an optical fiber cable, C1 is an extra length, and P is a utility pole.

Claims (1)

[Scope of utility model registration request] An optical fiber cable is wired overhead at a distance from the utility pole approximately at the tip of an arm protruding from the side of the utility pole in a substantially horizontal direction, and the optical fiber cable is connected to a support member attached to the tip of the arm. A metal fitting for overhead wiring of an optical fiber cable, characterized in that the circular extra length portion of the cable is fixed and held by supports at a plurality of locations in the circumferential direction of the cable.