JPH02282709A - Ribon structure optical fiber cable - Google Patents

Abstract

PURPOSE:To facilitate the identification of individual ribon structure coated optical fibers by applying color codes corresponding to slot numbers and layer numbers on the respective coated optical fibers. CONSTITUTION:The uppermost ribon structure optical fibers are the coated optical fibers to be positioned on the outermost side of slots with all of the coated optical fibers (a) housed in the 1st slot of the optical cable, the coated optical fibers (b) housed in the 2nd slot and the coated optical fibers (c) housed in the 3rd slot. The optical fibers up to the second fiber from one side (N=2) are colored red and the optical fibers up to the third fiber from the opposite side (M=3) are colored green in the case of the coated optical fibers of the 3rd layer of the 2nd slot. The other optical fibers, i.e. the 3rd to 5th fibers from the one side are colored yellow. The slot number is eventually known if the number of the red fibers is viewed in this way. The layer number is known if the number of the green fibers is viewed and the fiber number is known if the positions of the red fibers are viewed. The identification of the individual coated optical fibers is thus facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tape fiber optical cable in which individual tape fibers can be easily identified.

[Prior art]

A conventional tape-core optical cable is shown in Figure 3.

11 is a plurality of (5 in this example) optical fiber strands 12
13 is a spacer having a plurality of slots (three in this example) on the outer periphery, and a plurality of slots (in this example, four) in each thrower H4. Contains the first side of the tape core wall (sheets). Note that 15 is a tension member such as a steel wire.

Since this type of optical cable has a large number of tape cores, it is required that each tape core can be easily identified. Of course, it is also necessary to be able to easily identify individual optical fibers within one ribbon.

For this reason, conventionally, tape core wires are colored as shown in Figure 4 for identification. (a) is the tape core housed in the first slot, C1 is the tape core housed in the second slot, and (C1 is the tape core housed in the third slot.) The top is the tape core located at the outermost side of the slot.

In both cases, the coloring was applied to one side of the tape core.

This coloring system is shown in the following table.

When colored as above, the slot number can be identified by the color of the outermost tape core, and within the same slot, the first layer is the slot color, and the second and subsequent layers are white, brown, and black. Since they are arranged in order, the layer number of the tape core can be identified by the color. Furthermore, since all of the coloring is applied to one side of the ribbon, the order of the optical fibers within the same ribbon can be identified from the position of the coloring.

〔assignment〕

However, this type of identification method has the disadvantage that if tape core wires are pulled out from multiple slots during connection, the fibers cannot be identified because the second and subsequent layers of each slot are the same color. was there. Furthermore, since they are of the same color, there is also the problem that if an incorrect connection occurs, it is difficult to detect the error.

In order to eliminate this problem, it would be possible to handle the tape fibers in units of slots, but this may not always be possible in actual connection work.

[Means for solving problems and their effects]

In order to solve the above-mentioned problems, the present invention includes a tape core in which a plurality of optical fibers are arranged in a planar manner and integrated, and a spacer having a plurality of slots on the outer periphery. In a tape fiber optical cable in which a plurality of tape fibers are housed in each slot, each tape fiber in the Nth slot (N is the slot number) is the 1st to Nth tape fiber from one side. The optical fibers from the opposite side are colored in the first color, and the Mth layer of tape core wire (M is the layer number of the tape core) in each slot is colored with the Mth optical fiber from the opposite side. The wire is colored in a second color, and the other wires are colored in a third color.

In this way, the slot number can be identified from the color on one side of the tape core and its number, and the layer number of the tape core can be identified from the color and number of the tape core on the opposite side. Furthermore, since one side of the tape cable is always colored with the first color, it is possible to identify the numbers of the optical fibers in the tape cable using this as a reference. Since the combination of the number of first color fibers and the number of second color fibers is different for each core wire, the slot number and layer number of the tape core wire can be immediately determined by looking at the combination.

Furthermore, when the number of optical fibers in the ribbon is small, the following coloring method may be used.

That is, in each ribbon fiber in the Nth slot, the first and Nth optical fibers from one side are colored in the first color, and the tape fiber in the Mth layer in each slot is colored in the opposite color. The optical fiber strands from the side to the (M-1)th strand (excluding the optical fiber strands colored in the first color) are colored in the second color, and the other strands are colored in the third color. It is colored in.

In this way, the number of colored strips of the first color and the second color can be minimized, and the slot number can be identified from the color on one side of the tape core and its position, and the rest can be done in the same way as above. It is possible to identify the layer numbers of tape cores within the same slot and the numbers of optical fiber strands within the same tape core.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the colored state of the tape fiber 11 in the tape fiber optical cable according to one embodiment of the present invention (corresponding to claim 1). Similar to Figure 4, fat is the tape fiber housed in the first slot of the optical cable in Figure 3, (bl is the second
The tape core fiber housed in slot No. 3, Tel, is the tape core fiber stored in slot No. 3, and in both cases, the top fiber core is the tape core fiber located at the outermost side of the slot. The number of optical fibers in each ribbon core 11 is eight.

This coloring system is shown in the following table.

Table 2 In this example, red is the first color, green is the second color, and yellow is the third color.

For example, the first layer of tape fiber in the first slot (Figure 1)
(1st layer of (Jl)), the first optical fiber from one side (N=1) is colored red, and the first optical fiber from the other side (M layer 1) is colored green. The rest, that is, the second to seventh fiber strands from one side, are colored yellow.

Also, the third layer of tape fiber in the second slot (Fig. 1 fb
In the 3rd layer of L), the second optical fiber from one side (N = 2) is colored red, and the third optical fiber from the other side (M layer 3) is colored green. The other fiber strands, that is, the third to fifth fibers from one side, are colored yellow.

Also, the fourth layer of tape fiber in the third slot (Fig. 1 (C)
1), the third (N' = 3) optical fibers from one side are colored red, and the fourth (M layer 4) from the other side are colored green. The remaining optical fibers, that is, the fourth optical fiber from one side, are colored yellow.

Because of the coloring described above, the slot number can be found by looking at the number of red wires, the layer number can be found by looking at the number of green wires, and the strand number can be found by looking at the position of red wires.

FIG. 2 shows another embodiment (corresponding to claim 2) of the present invention. As in Figure 1, fat is the tape fiber stored in the first slot of the optical cable in Figure 3, (b) is the tape fiber stored in the second slot, and tel is stored in the third slot. In each case, the top is the tape core located at the outermost side of the slot. The number of optical fibers in each ribbon core 11 is five.

This coloring system is shown in the following table.

Table 3 In this example as well, red is the first color, green is the second color, and yellow is the third color.

For example, the first layer of tape in the first slot (Figure 2)
In the first layer of (a), the first optical fiber from one side (the first and Nth fibers from one side, but since N = 1, only the first fiber) is colored red. There are no optical fibers colored green [from the opposite side (M-1)
However, since M=1, there are 0 fibers], and the remaining fibers, that is, the second to fifth fibers from one side, are colored yellow.

Also, the third layer of tape core wire in the second slot (Fig. 2(b)
(3rd layer), the first and second optical fibers from one side (because N = 2) are colored red, and the second from the other side (because M = 3) are colored red. The optical fiber strand is colored green, and the other optical fiber strand, that is, the third optical fiber strand from one side, is colored yellow.

Also, the 4th layer tape core wire in the 3rd slot (Figure 2 (C)
1), the first and third optical fibers from one side (because N = 3) are colored red, and the first, second, and fourth fibers from the opposite side are colored red. From (M-1)
Up to the first optical fiber (up to the third one, except for the third one, which is colored red, and the fourth one) is colored green, and since there is nothing else, it is colored yellow. The number of colored optical fiber strands is zero.

Because of the coloring described above, you can see the slot number by looking at the red position, the layer number by looking at the number of green wires (including 0 wires), and the wire number by looking at the red position. You will understand.

〔Effect of the invention〕

As explained above, according to the present invention, each tape core is given a color code corresponding to the slot number and layer number, so even when the tape core is pulled out from all the slots, There is an advantage that the slot number and layer number of the tape core can be identified, and the strand number within the tape core can also be identified. Further, the colored code is extremely easy to identify because the number or position of the first color from one side represents the slot number, and the number of the second color from the opposite side represents the layer number. Furthermore, the number of colors required is as few as three, and manufacturing is easy.

[Brief explanation of drawings]

Figures 1(a) to 1(C) are cross-sectional views showing the colored state of each tape core fiber in a tape fiber optical cable according to an embodiment of the present invention, and Figures 2(8) to tel are cross-sectional views showing the colored state of each tape core fiber in a tape fiber optical cable according to an embodiment of the present invention. A perspective view showing the colored state of each tape core in the tape fiber optical cable according to the example, FIG. 3 is a cross-sectional view of a conventional tape fiber optical cable, and FIGS. It is a perspective view showing the colored state of the line. 11: Tape core wire, 12: Optical fiber wire, 13 Ni spacer, 14 Ni slot, 15: Tensiding member. 46-1

Claims (1)

[Scope of Claims] 1. A tape core in which a plurality of optical fibers are arranged in a planar manner and integrated, and a spacer having a plurality of slots on the outer periphery, each of which is provided in each slot of the spacer. In a tape coated optical cable that stores multiple tape coated wires, each tape coated wire in the Nth slot (N is the slot number) contains the first to Nth optical fibers from one side. is colored in the first color, and the M-th layer of tape core (M is the layer number of the tape core) in each slot is colored in the second color. A tape-core optical cable characterized in that the other wires are colored in a third color. 2. Equipped with a tape core in which a plurality of optical fibers are arranged in a plane and integrated, and a spacer having a plurality of slots on the outer periphery, and a plurality of tape cores in each slot of the spacer. In the tape-core optical cable, the first and Nth optical fibers from one side of each tape core in the Nth slot (N is the slot number) are colored in the first color. The M-th layer of tape core (M is the layer number of the tape core) in each slot is the (M-1)th optical fiber from the opposite side (but colored in the first color). A tape-core optical cable characterized in that the optical fiber (excluding the strands of optical fiber) is colored in a second color, and the other strands are colored in a third color.