JPH08110452A - Optical fiber cable and optical cable-containing electric wire - Google Patents

Abstract

PURPOSE: To simplify production stages and to obtain ultra-multiple fiber optical fiber cables by forming housing lines adjacently to each other in such a manner that the V-shaped aperture of one line is covered with the V-shaped side wall of the other line. CONSTITUTION: Optical fibers 11 are housed in V-grooves formed by the V-shaped housing lines 12. The housing lines 12 are formed adjacent to each other in such a manner that the V-shaped apertures 12a are covered by the V-shaped side walls 12b of the adjacent V-shaped housing lines 12. The end face 12c of the side walls 12b of the one V-shaped housing line 12 is pressed in this state to both end parts 12d, 12e of the side walls 12b of the adjacent other housing line 12. The sections of the V-shaped housing lines 12 constitute an isosceles triangular shape of a vertex of 60 deg.. The outside shapes formed by pressing of the V-shaped housing grooves 12 to each other form the optical fiber cable 13 of a regular hexagonal shape if six pieces of the V-shaped housing grooves 12 are radially arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable and an optical fiber-containing electric wire such as an overhead power transmission line and an overhead ground wire including the optical fiber.

[0002]

2. Description of the Related Art Conventionally, in the case of forming an optical fiber into a cable, various measures have been taken to protect the optical fiber from external force. For example, as shown in FIG. 3, a groove 3a is formed in a spacer 3, an optical fiber 1 or an optical fiber unit is housed therein, and the spacer in this state is inserted into a coating layer 4 made of an aluminum circular tube to form an optical fiber. Cable. Alternatively, as shown in FIG. 4, the optical fiber 1 or the optical fiber unit is attached to a reinforcing core member (tension member) 5
At the same time, it is inserted in the protective layer 6 made of an FRP circular tube, and this protective layer 6 is further inserted in the coating layer 4 made of an aluminum circular tube to form an optical fiber cable. Further, as shown in FIG. 5, the ribbon-shaped optical fiber unit 1a is housed in the U-shaped groove 7, and in this state, the U-shaped groove 7 is inserted into the coating layer 4 made of an aluminum circular tube. , Forming a multi-core optical fiber cable.

[0003]

However, in the optical fiber cables shown in FIGS. 3 and 4, the aluminum circular tube serving as the coating layer 4 is required to house the optical fiber 1. For this reason, it is necessary to make a circular pipe and twist the optical fibers in order to prevent the optical fibers from being twisted or scattered in the circular pipe, which causes a complicated manufacturing process and a cost increase. Was there. Further, also in the optical fiber cable shown in FIG. 5, a circular tube to be the covering layer 4 is required to house the optical fiber unit 1a.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides an optical fiber cable and an optical fiber-containing electric wire which solve the above-mentioned problems, in which V-shaped storage strips having grooves are radially arranged, and In an optical fiber cable in which an optical fiber is accommodated in the groove, the accommodating strips are adjacent to each other so that the V-shaped opening of one strip is covered by the V-shaped side wall of the other strip. A first invention is defined as a second invention, and an optical fiber-containing electric wire (including a cable) obtained by twisting metal wires on the outside of the optical fiber cable of the above invention is defined as a second invention.

[0005]

As described above, when the storage strips are adjacent to each other so that the V-shaped opening surface of one storage strip is covered by the V-shaped side wall of the other strip, the optical fibers stored in the groove are grooved. Since it does not fall off, it is not necessary to cover the radially arranged storage strips with a circular pipe as a coating layer.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view of an embodiment of the optical fiber cable according to the present invention. In the figure, 11 is an optical fiber, and 12 is a V-shaped storage strip for housing the optical fiber 11. The V-shaped storage strip 12 is made of a material such as FRP or metal, and is formed in a V-shape by being shaped so as to have an isosceles triangle with a vertical angle of 60 °. The optical fiber 11 is housed in the V groove formed by the V-shaped housing strip 12. This storage strip 12 is a V-shaped storage strip 12 having a V-shaped opening 12a adjacent thereto.
Are adjacent to each other so as to be covered with the V-shaped side wall 12b. In this state, the side wall 12b of the one V-shaped storage strip 12
The end face 12c of the side wall 12 of the other adjacent storage strip 12 is
It is in contact with both ends 12d and 12e of b. In this embodiment, the V-shaped storage strip 12 has an isosceles triangle with a vertical angle of 60 °. It is possible to form the optical fiber cable 13 having a regular hexagonal outer shape in contact with the optical fiber cable 13. Note that the abutting portions of the end face 12c and the end portion 12d are fixed with an adhesive or by welding so that the adjacent V-shaped storage strips 12 are not separated. Alternatively, the V-shaped storage strip 12 may be fixed by winding a bind wire or a band on the outside of the optical fiber cable 13 at an arbitrary position.

FIG. 2 is a sectional view of an optical fiber containing electric wire 14 according to another invention. In the above embodiment, the V-shaped storage strip 1
In the present embodiment, the V-shaped accommodating strips 12 are radially arranged in two layers and twisted together, and the V-shaped accommodating strips 12 are arranged outside the V-shaped accommodating strips 12. 1
The metal element wires 15 having a triangular cross-section and having the same cross-sectional shape as 2 are twisted together. In the optical fiber cable of the present invention, the number of laminated V-shaped storage strips is not limited to one or two. Further, the shape of the V-shaped storage strip is not limited to the apex angle of 60 °. Furthermore, the metal wire to be twisted on the outside of the optical fiber cable of the present invention is not limited to a single wire, and its cross-sectional shape does not have to be the same as the cross section of the V-shaped storage strip, and may be a round cross section.

[0008]

As described above, according to the present invention, in the optical fiber cable in which the V-shaped storage strips having the grooves are radially arranged, and the optical fibers are stored in the grooves, Since the storage strips are adjacent to each other so that the V-shaped opening of one strip is covered by the V-shaped side wall of the other strip, it is not necessary to cover the storage strip with a circular pipe that serves as a coating layer. The manufacturing process is simplified, and an excellent effect that an optical fiber cable having an ultra-multicore is obtained can be obtained. Moreover, by twisting a metal wire on the outer side of the optical fiber, there is an excellent effect that an electric wire having a multicore optical fiber can be easily formed.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of an optical fiber cable according to the present invention.

FIG. 2 is a cross-sectional view of an example of an optical fiber-containing electric wire according to the present invention.

FIG. 3 is a sectional view of a conventional optical fiber cable.

FIG. 4 is a cross-sectional view of another conventional optical fiber cable.

FIG. 5 is a sectional view of still another conventional optical fiber cable.

[Explanation of symbols]

 11 Optical Fiber 12 V-Type Storage Article 12a Opening 12b Side Wall 12c End Face 12d, 12e End 13 Optical Fiber Cable 14 Optical Fiber Containing Electric Wire 15 Metal Element Wire

Claims (2)

[Claims] 1. An optical fiber cable in which V-shaped storage strips each having a groove are radially arranged, and an optical fiber is stored in the groove, wherein the storage strip is a V-shaped one of the strips. An optical fiber cable, wherein the openings are adjacent to each other so as to be covered by the V-shaped side wall of the other strip. 2. An optical fiber-containing electric wire, characterized in that a metal wire is twisted on the outside of the optical fiber cable according to claim 1.