JPH0417922Y2 - - Google Patents

Description

[Detailed description of the invention] [Summary of the invention] A tape-shaped optical fiber core formed by overlapping one end of a plurality of tape-shaped optical fiber cores and bonding them together with tape via an adhesive. By coloring part or all of the optical fiber assembly so that the cross section perpendicular to the length direction of the optical fiber assembly is asymmetrical, tape-like light can be applied to pipe-shaped members or grooves of grooved spacers. A tape-shaped optical fiber core assembly that does not cause any arrangement disorder when the fiber cores are stored or after the fibers are stored, and that can be easily identified.

[Industrial application field]

The present invention is an optical fiber unit and an optical fiber cable in which tape-shaped optical fiber cores (hereinafter referred to as tape core fibers) are assembled. It is about improvement.

[Conventional technology]

As an example of a method for increasing the density of optical fibers, various ribbon core wires, the cross-sectional structures of which are shown in FIGS. 3a to 3c, have been developed. 8 is optical fiber,
Reference numeral 9 indicates an optical fiber coating, and 10 indicates a tape core coating. This type of tape core is a tape having a core colored portion 6 partially colored in a pipe-shaped member or in the groove 12 of a so-called grooved spacer 13, as shown in FIG. Generally, a plurality of partially colored core wires 7 are stored and made into a cable for practical use. In FIG. 4, reference numeral 11 indicates a tensile strength member, 14 indicates a presser tape, and 15 indicates a cable sheath.

[Problem that the invention attempts to solve]

In conventional tape fiber storage cables, the tape fibers are independent of each other and are not integrated. For example, in the case of the grooved spacer type cable illustrated in Fig. 4, the spacer cables are separated as shown in Fig. 4. The tape core wires often become misaligned in the grooves 12 of the tape. This disordered arrangement of the tape core wires is extremely inconvenient from the viewpoint of transmission characteristics and long-term strength guarantee.

In addition, in order to distinguish each tape fiber from each other and to identify each optical fiber within the tape fiber, all tape fibers must be marked with identification markings, as shown in the example below. It is required that the partially colored core wire 7 be constructed with the core colored portions 6 all having different colors and shapes. In this way, marking all tape cores is disadvantageous from the viewpoint of tape core inventory management, and in order to industrially efficiently mass produce each tape core, it is necessary to mark each tape core as far as possible in the subsequent process. It is desirable that there should be no difference between the core wires.

[Means for solving problems]

In order to solve the conventional problems, the present invention has been developed by overlapping multiple tape core wires and bonding one end of each of the tape core wires together with tape through an adhesive to form a tape core wire assembly. The tape fiber assembly is characterized by forming a structure that is asymmetrical in a cross section substantially perpendicular to the length direction of the tape fiber assembly by coloring part or all of the tape fiber assembly. .

[Effect]

The present invention has a structure in which a part or all of the tape fiber assembly is colored so that it is asymmetrical in cross section. By coloring all the parts, there is no need to make different markings for each part. This will be explained below with reference to the drawings.

〔Example〕

FIGS. 1a to 1d show the cross-sectional structure of an embodiment of a ribbon fiber assembly in which the present invention is implemented. In the figure,
1 is a tape core wire, 2 is an adhesive applied to one end of each of the tape core wires, 3 is a tape colored part where the tape is colored, and 4 and 4' are each one end of the tape core wire 1. and a partially colored tape having partially colored portions 3, 5 is a colored tape core in which the entire covering of the tape core 1 is colored, and 6 is a tape core. 1
Cord colored portion 7 is partially colored, and numeral 7 is a partially colored cord having a cord colored portion 6 on tape cord 1 .

In each of the embodiments of the present invention illustrated in FIGS.
It is clear from the figure that the tape fibers 1 can be easily identified from each other and the optical fibers within each tape fiber. Among these embodiments, in particular, in the case of the tape fiber assembly shown in FIG. It can be said that it has an excellent structure.

FIG. 2 shows a cross-sectional structure of a spacer-type optical fiber cable in which the tape core assembly of the present invention having the structure shown in FIG. 1a is housed in the groove 12 of the grooved spacer 13. In other elements of the cable structure, the same reference numerals as in FIG. 4 indicate the same parts.

[Effect of idea]

As mentioned above, since the tape fiber assembly according to the present invention has a structure in which only one end of each tape fiber is bonded and integrated, when processing the tape fiber assembly during cable manufacturing, Even if bending or torsional strain is applied to the tape core wire assembly, the presence of the other end where the tape core wires are not bonded to each other will alleviate the bending or torsion strain and will cause the tape core wires to be disarranged. In addition, the tape cores do not become disarrayed when stored in pipe-shaped members or grooves of grooved spacers, and even after being stored, they are easy to identify, and have excellent productivity, which is highly effective. .

[Brief explanation of the drawing]

Figures 1 a to d are examples of the cross-sectional structure of a tape core assembly according to the present invention, Figure 2 is a cross-sectional structure of a cable containing the tape core assembly of the present invention, and Figures 3 a to c are examples of various tape cores. Figure 4 is an example of a cross-section of a conventional tape cable storage cable. DESCRIPTION OF SYMBOLS 1... Tape core wire, 2... Adhesive, 3... Tape colored part, 4... Tape, 4'... Partially colored tape, 5... Colored tape core wire, 6... Core wire colored part, 7... Partially colored core wire, 8... Optical fiber,
9... Optical fiber wire coating, 10... Tape core wire coating, 11... Tensile strength body, 12... Groove, 13...
Grooved spacer, 14... Presser winding tape, 15...
cable sheath.

Claims (1)

[Claims for Utility Model Registration] A plurality of tape-shaped optical fiber cores 1 are overlapped, and one end of each of the tape-shaped optical fiber cores 1 is bonded with tapes 4, 4' via an adhesive 2. A structure in which a cross section substantially perpendicular to the length direction of the tape-shaped optical fiber core assembly is asymmetrical by coloring a part or all of the tape-shaped optical fiber core assembly formed by bonding and integrating the tape-shaped optical fiber core assembly. A tape-shaped optical fiber core assembly comprising: