JP3155724B2 - Winding method of wound optical fiber cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding type optical fiber cable winding method.

[0002]

2. Description of the Related Art Conventionally, overhead lines (overhead ground lines, overhead transmission lines,
2. Description of the Related Art A wound optical fiber cable in which an optical fiber cable is spirally wound around an outer periphery of an overhead distribution line or the like is known. This winding type optical fiber cable has an advantage that it is easy to implement since it is only necessary to spirally wind the optical fiber cable around the outer circumference of the overhead wire.

[0003] By the way, in order to spirally wind an optical fiber cable around the constructed overhead line, a winding machine is run around the constructed overhead line. The winding machine is a bobbin wound optical fiber cable,
It is provided with a traveling roller that travels on an overhead line, a driving device that drives the traveling roller, and the like, and is very heavy at about 150 kg.

[0004]

As described above, when the operation of spirally winding an optical fiber cable around the outer circumference of an overhead wire using a very heavy winding machine is performed, the weight of the winding machine is reduced. Causes the overhead wire to elongate. As described above, when the optical fiber cable is spirally wound around the stretched overhead wire, there is a problem that the optical fiber cable becomes loose after the winding machine is removed. That is, when the winding machine is removed, the stretched overhead wire is no longer stretched, and the optical fiber cable is loosened. If the optical fiber cable is loosened, the wind or the like causes repeated vibrations and the like in the optical fiber cable, which causes damage to the optical fiber cable. Therefore, it is necessary to prevent the optical fiber cable from being loosened.

[0005]

SUMMARY OF THE INVENTION The present invention provides a method of winding a wrapping type optical fiber cable which solves the above-mentioned problems. In a winding type optical fiber cable winding method in which an optical fiber cable is spirally wound around the outer circumference of the optical fiber cable, the elongation of the optical fiber cable is greater than the elongation caused in the overhead wire by the weight of the winding machine. A method of winding a windable optical fiber cable, comprising winding an optical fiber cable around an overhead wire.

[0006] As described above, when the optical fiber cable is wound around the overhead wire in a state where the optical fiber cable is stretched more than the extension caused in the overhead wire due to the weight of the winding machine, after the winding machine is removed. The optical fiber cable does not loosen even if the overhead wire does not grow. In other words, when the winding machine is removed and the overhead wire elongates, the extension of the optical fiber cable decreases, but the extension of the optical fiber cable is greater than the extension of the overhead wire. , That is, the tension remains. For this reason, the optical fiber cable is not loosened even if the overhead wire does not elongate. The upper limit of the elongation caused in the optical fiber cable is appropriately selected within a range that does not damage the optical fiber cable.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram for carrying out a method for winding a windable optical fiber cable according to the present invention.

Reference numeral 10 denotes a steel tower, on which an overhead wire 20 such as an overhead ground wire is installed. Now, a case where the optical fiber cable 30 is wound around the overhead wire 20 will be described. First, the winding machine 40 is attached to the overhead wire 20 near the tower 10. Although not shown, the winding machine 40 includes a roller running on the overhead wire 20, a driving device for driving the roller, a bobbin around which an optical fiber cable is wound, and the like.

Next, the optical fiber cable 30 is spirally wound around the overhead wire by running the winding machine 40 on the overhead wire 20. In the present invention, the optical fiber cable 30 is wound around the optical fiber cable 30. The optical fiber cable is stretched by applying a predetermined tension, and the stretched optical fiber cable 30 is spirally wound around the outer circumference of the overhead wire. The amount of extension of the optical fiber cable 30 is set to be equal to or greater than the extension generated in the overhead wire 20 due to the weight of the winding machine 40. For example, if the extension of the overhead wire 20 due to the weight of the winding machine 40 is B%, the optical fiber cable causes the extension of B% or more. As shown in FIG. 2, in order to cause the optical fiber cable to elongate by more than B%, the optical fiber cable 3 is applied while applying a tension of A (kg) or more to the optical fiber cable 30.
What is necessary is just to wind 0. Applying a tension of A (kg) or more to the optical fiber cable 30 is performed, for example, by controlling the rotation of the bobbin by applying a braking force to the bobbin around which the optical fiber cable is wound. As described above, the upper limit of the elongation caused in the optical fiber cable 30 is appropriately selected within a range that does not damage the optical fiber cable 30.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Nominal cross-sectional area of 70
It bridged the overhead ground wire of mm ^2, the total weight of about 15 to the cross-open space line
An optical fiber cable was wound with a 0 kg winding machine attached. Since the overhead ground wire elongates about 0.068%, the optical fiber cable was wound while applying a tension of about 7.8 kg to the optical fiber cable in order to give the optical fiber cable a larger elongation (0.07%). Thereafter, the winding machine was removed. As a result, the optical fiber cable was wound around the overhead ground wire without loosening.

[0011]

As described above, in the method for winding a wrapping type optical fiber cable according to the present invention, the wrapping machine is caused to run around an installed overhead wire and the optical fiber cable is spirally wound around the outer circumference of the overhead wire. In the method of winding a windable optical fiber cable wound in a shape, the optical fiber cable is wound around the overhead wire in a state in which the optical fiber cable is stretched by the weight of the winding machine and the elongation of the overhead wire is increased. Since the winding type optical fiber cable is characterized by being wound, the optical fiber cable is wound around the overhead ground wire without loosening even after the winding machine is removed from the overhead wire. Therefore, the optical fiber cable can be prevented from being damaged repeatedly without being repeatedly vibrated by wind or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a method for winding a windable optical fiber cable according to the present invention.

FIG. 2 is a diagram showing a relationship between elongation and tension of an optical fiber cable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Steel tower 20 Overhead wire 30 Optical fiber cable 40 Winding machine

Claims (1)

(57) [Claims] 1. A winding type optical fiber cable winding method wherein a winding machine is run around an installed overhead wire and an optical fiber cable is spirally wound around an outer circumference of the overhead wire. Winding the optical fiber cable around the overhead wire in a state in which the optical fiber cable is stretched more than the extension caused in the overhead wire by the weight of the optical fiber cable.