JPH0795132B2 - Aerial optical fiber cable unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a cable unit for installing an optical fiber cable between electric poles, and is suitable for subscriber communication lines and the like.

<< Prior Art >> Conventionally, when a cable is installed along a utility pole, as shown in FIG. 5, a cable 23 around which a drum 21 is wound is connected to a conductor 23, and the conductor 23 is connected to each utility pole 24. The long cable was passed through the gold wheel (pulley) 25 attached to the and then wound by the wire drawing machine 26, so that the long cable was hung on the utility pole.

<< Problems to be solved by the invention >> However, such a wire drawing work requires a lot of manpower for setting up the wagon, pull-down processing, and the like, and the cable drum and the wire drawing machine spread over a wide road. There is the problem of occupying and severely hindering traffic.

An object of the present invention is to provide a cable unit for easily installing an optical fiber cable.

<< Means for Solving the Problem >> The present invention provides an optical fiber cable having a length adapted to an interval of an electric current (support) and having a connector attached to an end thereof. In practice, cables with various lengths are prepared in increments of 1 meter, for example, and cables of appropriate length are selected and used according to the construction site. For the connector, a single-core connector and a multi-core connector can be used depending on the use of the cable.

As the optical fiber cable, a self-supporting cable in which a suspension wire is attached and the optical fiber cable is supported by the suspension wire is used. There are various types of self-supporting cables, such as those in which the main body optical fiber cable is supported in parallel with the suspension line, those in which the main body optical fiber cable is wound around the suspension line, and any of them may be used.

A connection box for housing the connector is attached to one end of the optical fiber cable. In addition, suspending metal fittings for connecting to the retaining metal fittings fixed to the electric pole are attached to the ends of the suspension wire.

Both ends of this cable are pulled up to the corresponding utility pole, and the metal fittings at both ends of the suspension wire are fixed to the utility pole. Then, the end connector of the optical fiber cable and the connector of the adjacent cable are connected and housed in the connection box.

<< Embodiment >> FIG. 1 shows a cable unit 1. Reference numeral 2 is an optical fiber cable which is the main body of the unit,
It is a bundle of optical fibers wrapped in a plastic skin. A suspension wire 3 is attached to the optical fiber cable 2, and both are connected by a hanger 4 placed at regular intervals.

This cable unit 1 has a length which is 1 to several times as large as the interval (usually 30 to 50 m) between electric poles (supports).

A suspension fitting 5, which is an eyepiece, is attached to the end of the suspension wire 3. Further, connectors 6 for optically connecting to adjacent cable units are attached to both ends of the optical fiber cable 2. In addition, cable 2
The connection box 7 is attached to one end of the
The connector 6 at one end of the cable is drawn into it.

When laying the cable, as shown in FIG.
A unit 1 having a length adapted to the interval is prepared, placed at the foot of the electric pole 8, and both ends of the cable are pulled up onto the electric pole as shown by a chain line in the figure. Then, as shown in FIG. 3, the suspension metal fittings 5 are fixed to the retractable metal fittings 9 attached to the electric poles 8, and the suspension wires 5 are stretched between the electric poles. Next, the connection box 7 is fixed to a telephone pole, the adjacent cable is drawn into the box, and the connectors 6 are connected to each other. Similarly, the other end is pulled into the connection box of the adjacent cable and connected.

FIG. 4 schematically shows a communication system constructed by using the cable unit 1 in this way. In the figure, reference numeral 10 is a cable stretched between utility poles, and reference numeral 11 is an in-home cable pulled from the utility pole to the subscriber's building. The house lead-in cable 11 is structurally almost the same as the cable 10 between telephone poles, the lower end thereof is held in the building, and is connected to the house optical cable in a terminal box 12 provided in the building.

<< Effects of the Invention >> According to this invention, the following effects are obtained.

The optical fiber cable unit according to claim 1 is formed so as to have a length that fits the space between utility poles, and is pulled up on the utility pole to be connected to an adjacent one. Since the installation itself is easy and there is no need for cable drums or wire drawing machines, there is no need to occupy a wide road during construction. Further, since the cables are connected to each other by using connectors instead of fusion splicing, the cables can be quickly connected. Since the connection box for covering the connector is attached to one end of the optical fiber cable in advance, the connection work can be performed easily and in a short time.

In addition, as described in claim 2, when the suspending metal fitting for connecting to the retaining metal fitting fixed to the electric pole is attached to the end of the suspension wire in advance, the retaining work can be quickly performed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a cable unit, FIG. 2 is a conceptual diagram showing a cable erection method, FIG. 3 is an explanatory diagram of an end of the erected cable, and FIG. 4 is a schematic diagram of a erected communication system. ,
FIG. 5 is a conceptual diagram showing a conventional erection method. 1 ... Cable unit, 2 ... Optical fiber cable,
3 ... Hanging wire, 5 ... Hanging metal fitting, 6 ... Connector, 7 ...
… Connection box, 8 …… Utility pole (support)

Claims (2)

[Claims] 1. A length adapted to the distance between the supports 8,
An aerial optical fiber cable 2 attached to the suspension wire 3, connection connectors 6 attached to both ends of the optical fiber cable for connecting to an adjacent cable, and an optical fiber cable 2 attached to one end of the optical fiber cable 2. An aerial optical fiber cable unit including a connection box 7 for covering the connector 6. 2. A length adapted to the distance between the supports 8,
An aerial optical fiber cable 2 attached to a suspension wire 3, connection connectors 6 attached to both ends of the optical fiber cable for connecting to an adjacent cable, and a support attached to an end portion of the suspension wire 3. An aerial fiber optic cable unit comprising a suspending fitting 5 for connecting to a retracting fitting 9 fixed to an object 8.