JPH07117632B2 - Optical fiber cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a tape core optical cable in which individual tape cores can be easily identified.

[Prior art]

Figure 3 shows a conventional optical fiber cable. Reference numeral 11 denotes a tape core wire formed by planarly arranging and integrating a plurality of optical fiber element wires 12 (five in this example), and 13 is a spacer having a plurality of slots (three in this example) of slots 14 on the outer circumference. In each slot 14, a plurality of (four in this example) tape cores 11 are housed. Reference numeral 15 is a tension member such as a steel wire.

In this type of optical cable, since the number of tape core wires increases, it is required that the individual tape core wires be easily identifiable. Of course, it is also necessary to be able to easily identify individual optical fiber strands within a single ribbon.

For this reason, conventionally, the ribbon has been colored for identification as shown in FIG. (A) is a tape core wire housed in the first slot, (b) is a tape core wire housed in the second slot, and (c) is a tape core wire housed in the third slot, In each case, the tape core is located at the top of the slot. All colorings are applied to one side of the tape core wire.

This coloring method is shown in the table below.

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

〔Task〕

However, in such an identification method, if the tape core wires are pulled out from a plurality of slots at the time of connection or the like, the core wires cannot be identified because the second and lower layers of each slot have the same color. was there. In addition, since the colors are the same, there is a problem that it is difficult to find the error if an incorrect connection occurs.

In order to eliminate this, it is sufficient to handle the tape core wire in slot units, but this may not always be possible in the actual connection work.

[Means for solving the problem and its action]

In order to solve the above problems, the present invention includes a tape core wire in which a plurality of optical fiber element wires are arranged in a plane and integrated, and a spacer having a plurality of slots on the outer periphery, In a cable optical fiber cable in which a plurality of tape cores are housed in the respective slots, each tape core is assumed, where n is the number of slots in the spacer and m is the number of laminated tape cores in each slot. The number of optical fiber strands is n + m or more, and each tape core wire in the Nth slot (N is the slot number) is the first to Nth optical fiber strands on one side. It is colored one color, and the tape core wire of the M-th layer (M is the layer number of the tape core wire) in each slot is the second optical fiber wire from the first to the M-th optical fiber on the opposite side. Colored in other colors Ba wire is colored with a third color, it is characterized.

In this way, the slot number can be identified from the color on one side of the tape core wire and its number, and the layer number of the tape core wire can be identified from the color on the other side and its number. Further, since the first color is always colored on one side of the tape core wire, the number of the optical fiber element wire in the tape core wire can be identified on the basis of it. Since the combinations of the numbers of the first color and the numbers of the second color are different in each core wire, the slot number and the layer number of the tape core wire can be immediately discriminated by looking at the combination.

Further, when the number of optical fiber strands in the tape core wire is small, the following coloring method may be used. That is, when the number of laminated tape core wires in each slot is m, the number of optical fiber element wires in each tape core wire is m + 1 or more, and
For each tape core wire in the slot No. (N is the number of the slot), the first to N-th optical fiber wires on one side are colored in the first color, and the tape core wire of the Mth layer in each slot (M is the layer number of the tape core wire) is the second to the (M-1) th optical fiber strand (excluding the optical fiber strand colored in the first color) on the opposite side. The other optical fiber strands are colored in the third color.

By doing this, the number of colors of the first color and the second color can be minimized, and the color on one side of the tape core wire and the slot number can be identified from the position, and the rest is the same as above. The layer number of the tape core wire in the same slot and the number of the optical fiber strand in the same tape core wire can be identified.

〔Example〕

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

FIG. 1 shows a colored state of a tape core wire 11 in a tape core wire optical cable according to an embodiment (corresponding to claim 1) of the present invention. Similar to FIG. 4, (a) is the tape core wire housed in the first slot of the optical cable of FIG. 3, (b) is the tape core wire housed in the second slot, and (c) is the third. The tape core wires housed in the slot No. are the tape core wires located at the outermost side of the slots. The number of optical fiber strands in each tape core wire 11 is 8 (the number of slots n = 3, the number of laminated tape core wires m = 4).

This coloring method is shown in the table below.

In this embodiment, red is the first color, green is the second color, and yellow is the third color.

For example, the tape core wire of the 1st layer of the 1st slot (Fig. 1
In (a) first layer, the first (N = 1) optical fiber strand from one side is colored red, and the first (M = 1) optical fiber strand from the opposite side is green. Other than that, that is, the second to seventh optical fiber strands from one side are colored yellow.

Also, the tape core wire of the third layer of the second slot (Fig. 1
In the third layer of (b), the optical fiber strands from one side to the second (N = 2) are colored red, and the optical fiber strands from the other side to the third (M = 3) are Other than that, that is, the third to fifth optical fiber strands from one side are colored yellow.

Also, the tape core wire of the fourth layer of the third slot (Fig. 1
In the (c) fourth layer, the optical fiber strands from one side to the third (N = 3) are colored red, and the optical fiber strands from the other side to the fourth (M = 4) are Other than that, that is, the fourth optical fiber element from one side is colored yellow.

Since the coloring is performed as described above, the slot number can be known by looking at the number of red lines, the layer number can be known by looking at the number of green lines, and the strand number can be known by looking at the red position.

FIG. 2 shows another embodiment (corresponding to claim 2) of the present invention. Similar to FIG. 1, (a) is the first of the optical cable of FIG.
The tape core wire stored in the No. slot, (b) is the tape core wire stored in the No. 2 slot, and (c) is the tape core wire stored in the No. 3 slot. This is the tape core located on the outermost side of the slot. The number of optical fiber strands in each tape core wire 11 is 5 (the number of laminated tape core wires m = 4).

This coloring method is shown in the table below.

Also in this embodiment, red is the first color, green is the second color, and yellow is the third color.

For example, the tape core wire of the 1st layer of the 1st slot (Fig. 2
In (a) first layer, the first optical fiber from one side (the first and Nth from one side, but since N = 1, only the first optical fiber) is colored red. , 0 green optical fiber strands [from opposite side (M-1)
It is up to the first line, but it is 0 because M = 1]. Other than that, that is, the second to fifth optical fiber strands from one side are colored yellow.

In addition, the tape core wire of the third layer of the second slot (Fig. 2
The third layer in (b) is the first and second lines (N = 2) from one side.
(Because it is) the optical fiber strand is colored red,
The optical fiber strands from the other side up to the second (because of M = 3) are colored green, and the other optical fiber strands, that is, the third optical fiber strand from one side are colored yellow.

Also, the tape core wire of the fourth layer of the third slot (Fig. 2
(C) The fourth layer is the first and third lines (N = 3) from one side.
(Because it is) the optical fiber strand is colored red,
1st, 2nd, 4th from the opposite side [From the opposite side (M-
1) Up to the third line, that is, up to the third line, but the third line is colored red.
Since the optical fiber strand of No. 1 is colored green and the others are not present, the number of optical fiber strands colored yellow is 0.

Since it is colored as above, the slot number can be found by looking at the red position, the layer number can be found by looking at the number of green lines (including 0), and the strand number can be found by looking at the red position. Will be understood.

〔The invention's effect〕

As described above, according to the present invention, since the color code corresponding to the slot number and the layer number is given to each tape core wire, even if the tape core wires are pulled out from all the slots, at first glance There is an advantage that the slot number and layer number of the tape core wire can be identified, and the strand number in the tape core wire can also be identified. The coloring code is very 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 other side represents the layer number. Furthermore, there are only three types of colors, and it is easy to manufacture.

[Brief description of drawings]

1 (a) to 1 (c) are sectional views showing a colored state of each tape core wire in a tape core wire optical cable according to an embodiment of the present invention, and FIGS. 2 (a) to 2 (c) are the cross sectional views of the present invention. The perspective view which shows the coloring state of each tape core wire in the tape core wire optical cable which concerns on another Example, FIG. 3 is sectional drawing of the conventional tape core wire optical cable, FIG. 4 (a)-(c) is the same cable. FIG. 6 is a perspective view showing a colored state of each tape core wire in FIG. 11: Tape core wire, 12: Optical fiber element wire, 13: Spacer, 14:
Slot, 15: Tension member.

Claims (2)

[Claims] 1. A tape core wire, in which a plurality of optical fiber element wires are arranged in a plane and integrated, and a spacer having a plurality of slots on the outer periphery are provided, and a plurality of sheets are provided in each slot of the spacer. In a tape optical fiber cable that accommodates tape core wires, when the number of slots in the spacer is n and the number of laminated tape core wires in each slot is m, the number of optical fiber element wires in each tape core wire is n + m or more, each of the tape core wires in the N-th slot (N is the slot number) has the first to N-th optical fiber strands on one side colored in the first color, In the M-th layer tape core wire (M is the layer number of the tape core wire) in each slot, the optical fiber element wires from the first to M-th optical fibers on the opposite side are colored in the second color, and the other optical fibers The fiber strand is colored a third color The optical fiber cable that is characterized by that. 2. A tape core wire, in which a plurality of optical fiber element wires are arranged in a plane and integrated, and a spacer having a plurality of slots on the outer circumference are provided, and a plurality of sheets are provided in each slot of the spacer. In a tape optical fiber optical cable containing a tape optical fiber, when the number of laminated tape optical fibers in each slot is m, the number of optical fiber elements of each tape optical fiber is m + 1 or more. In each slot (N is the slot number), the first and Nth optical fiber strands from one side are colored in the first color, and the tape core of the Mth layer in each slot The wires (M is the layer number of the tape core wire) are the first to (M-1) th optical fiber wires (excluding the optical fiber wires colored in the first color) on the opposite side. Optical fiber colored in two colors The strand is colored in a third color, which is a tape optical fiber cable.