JPH023164B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for extremely efficiently installing an optical fiber overhead ground wire.

[Prior Art] When connecting an optical fiber overhead ground wire, in addition to the electrical and mechanical connection of the ground wire itself, a separate optical connection of the optical fiber itself is required. Normally, the extra length is pulled down from the top, and this is done in a junction box placed at an appropriate position in the middle of the tower.

If such a pull-down connection is made by extending the wire for one drum individually, it is not very troublesome to take in the extra length, but when extending the wire, it is necessary to temporarily connect two or three drums and then Since it is much more efficient to extend the wires at once, in reality, the ground wires for multiple drums are temporarily connected and extended.

[Problems to be Solved by the Invention] When a plurality of drums are temporarily connected and extended at once as described above, the temporary connection portion of each drum becomes the pull-down connection portion of the optical fiber. However, creating the extra length for the pull-down connection is quite difficult.

In other words, when the temporary connection reaches the specified steel tower, a wire is hung on the optical fiber overhead ground wire on both sides of the tower at the connection point, and the wire is repeatedly pulled in and out to take in the extra length. , this is a very tedious task. Therefore, with the increase in the number of optical fiber overhead ground wires, there has been a growing demand for a method of overhead wire that can easily accommodate the extra length.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned circumstances, and its gist is to provide a method for connecting steel towers that require lowering of optical fiber overhead ground wires for connection. A loop-shaped extension circuit is formed, and the overhead ground wire is extended while passing through the loop-shaped extension circuit, and the optical fiber is extended when the planned optical fiber connection portion reaches the required position of the loop-shaped extension circuit. A method for overhead fiber optic ground wire, in which the line is stopped, the extra length existing in the loop-shaped extension circuit is used as a pull-down line segment for optical fiber connection, and the ground wire is tied to a steel tower. It is in.

[Example] This will be explained below based on examples.

FIG. 1 is an explanatory diagram showing how an optical fiber overhead ground wire 1 is extended according to the overhead wire method according to the present invention.

As shown in the figure, metal wheels 3, 3 and caterpillars 4, 4 are arranged on the steel tower 2, which serves as the down connection part of the optical fiber overhead ground wire, and a loop-shaped wire extension circuit 10 is formed. Prior to the wire extension, a messenger wire is delivered, and the messenger wire is delivered via this loop-shaped wire extension circuit 10, and connected to the end of the messenger wire to absorb the extracted light. The fiber overhead ground wire 1 is also extended via a wire extension circuit 10 as shown in the figure.

In this way, when the end of the optical fiber overhead ground wire 1 that has been temporarily connected reaches, for example, the vicinity of the lowest point of the wire extension circuit 10, the wire extension is stopped, and the extra length is added to the loop-shaped wire extension circuit 10. If the optical fiber overhead ground wire 1 is tied while the taken-in filament is stored, and the optical fibers are connected using the stored extra length, the ground wire can be connected as in the conventional example. Connection is completed without troublesome work such as pulling in and pulling back.

Note that the configuration of the loop-shaped wire extension circuit is not limited to the combination of a metal wheel and a caterpillar as shown in Figure 1, but may also consist of only a metal wheel or only a caterpillar, and may also include a large loop such as a windmill. You may also use a gold wheel that can be removed.

Furthermore, a loop-shaped wire circuit is constructed by combining conveyor-type metal wheels 5 whose outer arc surface 5a forms a part of a large circular arc as shown in FIG. 2 into a large circular arc as shown in FIG. You can also do that. Moreover, the combination of the conveyor type metal wheels 5, 5 can be configured not in a semicircular shape but in a large circle, or in a water wheel-like large metal wheel.

In addition, the configuration of the loop-shaped extended circuit is that instead of arranging the metal wheel 3 and caterpillars 4, 4 at the top of the steel tower in Fig. 1, curved caterpillars 4', 4' are arranged as shown in Fig. 4. It can also be placed like this.

[Effect of the invention] As described above, according to the overhead line method according to the present invention,
The conventional work of pulling in and pulling back can be omitted, and the optical fiber overhead ground wire can be efficiently connected to the overhead ground wire.Today, when the practical use of optical fiber overhead ground wires is in full swing, it is truly timely. There are things that should be highly appreciated.

[Brief explanation of drawings]

1 and 4 are explanatory diagrams showing how the wire is stretched according to the present invention, FIG. 2 is a sketch showing an example of a conveyor-type metal wheel, and FIG. 3 is a drawing showing how the conveyor-type metal wheel is combined and FIG. 1: Optical fiber overhead ground wire, 2: Steel tower, 3: Metal wheel, 4, 4': Caterpillar, 5: Conveyor type metal wheel,
10: Loop-shaped extended wire circuit.

Claims (1)

[Claims] 1. Forming a loop-shaped extension circuit on a steel tower that requires lowering of an optical fiber overhead ground wire for connection, and extending the overhead ground wire while passing through the loop-shaped extension circuit when extending the wire. Then, when the planned optical fiber connection part reaches the required position of the loop-shaped extension circuit, the extension is stopped, and the extra length existing in the loop-shaped extension circuit is used as a pull-down line segment for optical fiber connection. An overhead wiring method for optical fiber overhead ground wires that connects and connects the ground wires to the steel tower. 2. The overhead wire method according to claim 1, wherein the loop-shaped wire extension circuit is formed by a metal wheel, a caterpillar, or a combination of a metal wheel and a caterpillar. 3. The overhead line method according to claim 1, wherein the loop-shaped wire extension circuit is constructed by a combination of conveyor-type safes having an outer circular arc forming a part of a large circular arc.