WO2018168364A1

WO2018168364A1 - Optical fiber distribution member

Info

Publication number: WO2018168364A1
Application number: PCT/JP2018/006228
Authority: WO
Inventors: 鈴木　正義; 後藤　誠
Original assignee: 株式会社巴川製紙所
Priority date: 2017-03-15
Filing date: 2018-02-21
Publication date: 2018-09-20
Also published as: JP2018151590A

Abstract

The purpose of the present invention is to provide an optical fiber distribution member that facilitates distribution of optical fibers. The present invention is provided with a plurality of optical fibers that are distributed from a first end side to a second end side and that are covered so as to form a plurality of taped shapes which are parallel at the first end side and the second end side. The plurality of optical fibers pass through a bending region that is offset from both the direction of extension of the plurality of optical fibers at the first end side and the direction of extension of the plurality of optical fibers at the second end side, and are not covered in the bending region.

Description

Optical fiber wiring member

The present invention relates to an optical fiber wiring member used for optical fiber wiring.

There is a wiring member used for communication using an optical fiber ribbon that is coated with a plurality of optical fibers and formed into a tape shape (for example, Patent Document 1).

JP 2006-313212 A

When covering a plurality of optical fiber ribbons as described above, the coating may be temporarily removed due to signal line replacement or branching. Although installation work can be facilitated by making such wiring into a sheet in advance, this sheet may not be installed successfully depending on the installation space.

In view of the above circumstances, an object of the present invention is to provide an optical fiber wiring member that facilitates optical fiber wiring work.

The optical fiber wiring member of the present invention that solves the above-mentioned object is
Wired from one end side to the other end side, and provided with a plurality of optical fibers coated in a plurality of tapes parallel to the one end side and the other end side,
The plurality of optical fibers are:
Passing through the bending region deviated from both the extending direction of the plurality of optical fibers on the one end side and the extending direction of the plurality of optical fibers on the other end side,
The bending region is not covered.

According to this optical fiber wiring member, the bending region can be easily bent, and the installation work can be easily performed.

Here, the optical fiber wiring member described above is
It is preferable that an optical loss when the plurality of optical fibers in the bending region are bent by 180 ° is 0.2 dB or less.

This optical fiber wiring member can suppress light loss during installation.

Moreover, the optical fiber wiring member described above is
It is preferable that a length of the plurality of optical fibers in the bending region is equal to or longer than a length obtained by multiplying a bending radius of the optical fiber by a circumferential ratio.

This optical fiber wiring member can suppress light loss during installation.

Moreover, the optical fiber wiring member described above is
A covering member on one surface or both surfaces of the plurality of optical fibers coated in a plurality of tapes may be housed in a groove between the plurality of optical fibers.

According to this optical fiber wiring member, the tape-coated portion can be easily bent, and installation work can be easily performed.

Moreover, the optical fiber wiring member described above is
The arrangement order of the plurality of optical fibers on the one end side may be different from the arrangement order of the plurality of optical fibers on the other end side.

According to this optical fiber wiring member, the signal line can be switched from one end side to the other end side.

The description that the bending region of the optical fiber wiring member described above is shifted from the extending direction indicates the positional relationship in the state where the optical fiber wiring member is not subjected to an external bending force. It is.

Further, the above-described optical fiber wiring member is capable of overlapping a plurality of optical fibers coated in a plurality of tapes on one end side and the other end side by bending the bending region.

The optical fiber wiring member described above is such that the plurality of optical fibers on one end side and the other end side can be connected to an adapter in the optical fiber storage box.

According to the present invention, it is possible to provide an optical fiber wiring member that facilitates optical fiber wiring work.

It is a figure which shows the optical fiber wiring member of this embodiment. FIG. 2 is a cross-sectional view taken along line A-A ′ of the optical fiber wiring member shown in FIG. 1. It is a figure which shows an example of the use condition of the optical fiber wiring member 1 of this embodiment. It is a figure which shows a mode that the optical fiber wiring member 1 of this embodiment was stored in the storage case B. FIG. It is a figure which shows the modification of the optical fiber wiring member of this embodiment. It is a figure which shows the modification of the optical fiber wiring member of this embodiment. It is a figure which shows the modification of the optical fiber wiring member of this embodiment. It is a figure which shows the modification which changed the wiring of the optical fiber 11 of the area | region 31 for bending in FIG. 1, and changed the wiring of the tape which faces each other to cross wiring. It is a figure which shows the modification which changed the wiring of the optical fiber 11 of the area | region 31 for bending in FIG. 1, and made it the wiring by which a part of optical fiber 11 was replaced with the different tape. (A) is a modification in which the tape-shaped coating shown in FIG. 2 is thinned on both sides, and (B) is a modification in which the tape-shaped coating shown in FIG. It is a figure which shows the conventional sheet-like optical fiber wiring member.

Hereinafter, embodiments of the optical fiber wiring member of the present invention will be described with reference to the drawings.

First, the configuration of the optical fiber wiring member of the present embodiment will be described with reference to FIGS. FIG. 1 is a plan view showing an optical fiber wiring member 1 of the present embodiment. FIG. 2 is a cross-sectional view taken along line A-A ′ of the optical fiber wiring member shown in FIG. FIG. 3 is a diagram illustrating an example of a usage state of the optical fiber wiring member 1 of the present embodiment. FIG. 4 is a view showing a state in which the optical fiber wiring member 1 of the present embodiment is housed in the housing case.

The optical fiber wiring member 1 of the present embodiment shown in FIG. 1 is from the upper left end side (hereinafter may be referred to as one end side) to the lower right end side (hereinafter referred to as the other end side). A plurality of optical fibers 11 are wired. Here, the optical fiber is a fiber in which the surface of an optical fiber composed of a core and a clad is coated with a resin.

The plurality of optical fibers 11 are covered at both ends, and each has a shape of four tapes. In the following description, the optical fiber 11 coated in a tape shape may be simply referred to as a tape. In addition, as a covering member at the time of coating in a tape shape, known elastomers (silicone rubber, etc.), resins (acrylic resin, polyvinyl ether, etc.) can be mentioned, and from the point of being excellent in environmental properties, heat resistance, moisture resistance, etc. Silicone rubber is preferred.

The optical fiber wiring member 1 in FIG. 1 shows a state in which four tapes are wired in parallel at the upper left and lower right, which are both ends. In the following description, the four tapes on the upper left end side in FIG. 1 are referred to as a first tape 21, a second tape 22, a third tape 23, and a fourth tape 24 in order from the left. Further, the four tapes on the lower right end side in FIG. 1 are referred to as a fifth tape 25, a sixth tape 26, a seventh tape 27, and an eighth tape 28 in order from the right. Note that the number of optical fibers 11 covered by these tapes is four. FIG. 2 shows that there are four optical fiber wires 41 and four resin coatings 42 covering the optical fiber wires 41 inside the first tape 21, and these are covered with the tape coating 43. The optical fiber 11 includes the optical fiber 41 and the resin coating 42 covering the optical fiber 41. Therefore, it can be said that the first tape 21 is obtained by coating the four optical fibers 11 with the tape coating 43. Note that the tapes other than the first tape 21 have the same configuration.

The first tape 21, the second tape 22, the third tape 23, and the fourth tape 24 are bent at 90 ° (right direction in FIG. 1) in the middle and crossed, and then are adjacent to each other. These tapes are in a state where they are adhered to each other at a place where a plurality of tapes contact each other. The 1st tape 21, the 2nd tape 22, the 3rd tape 23, and the 4th tape 24 are comprised so that each edge part can be bent independently.

On the other hand, the fifth tape 25, the sixth tape 26, the seventh tape 27, and the eighth tape 28 are bent at 90 ° (leftward in FIG. 1) in the middle, and are adjacent to each other. These tapes are in a state of being bonded to each other at the places where they come into contact. The fifth tape 25, the sixth tape 26, the seventh tape 27, and the eighth tape 28 are configured so that their respective end portions can be bent independently.

The optical fiber wiring member 1 of the present embodiment is configured to pass through a bending region 31 that is shifted from the extending direction of the plurality of optical fibers 11 at both ends as shown in FIG. Specifically, referring to FIG. 1, the plurality of optical fibers 11 (inside the first tape 21, the second tape 22, the third tape 23, and the fourth tape 24) at the upper left end are respectively in the vertical direction. It extends and the bending region 31 is shifted to the right side with respect to the extending direction. A plurality of optical fibers 11 (inside the fifth tape 25, the sixth tape 26, the seventh tape 27, and the eighth tape 28) at the lower right end portion extend in the vertical direction, and the bending region 31. Is shifted to the left with respect to the extending direction. Here, being in a shifted position means a positional relationship in a state where no external bending force is applied to the optical fiber wiring member 1, and the optical fiber wiring member 1 of the present embodiment. Fig. 4 shows the positional relationship in a state where wiring is performed on a plane.

In the bending region 31, the plurality of optical fibers 11 are not covered and are not bonded to the adjacent optical fibers 11. If the optical fiber is coated or adhered to an adjacent optical fiber, these become obstacles when the optical fiber is bent. However, in the bending region 31, the one that inhibits the bending of the plurality of optical fibers 11 is obstructed. It can be bent easily because it is not. FIG. 3 shows a state in which the upper left end side wiring and the lower right end side wiring are overlapped by bending a plurality of optical fibers 11 in the bending region 31. Although FIG. 3 shows a state where only the bending region 31 is bent, the tape portion can also be bent. For this reason, the optical fiber wiring member 1 of the present embodiment is configured not only to bend the bending region 31 but also to be connected to the adapter in the storage box by bending the entirety including the tape portion. Has been. In FIG. 4, the optical fiber wiring member 1 housed in the storage box B is shown. In this figure, a state in which the tape of the optical fiber wiring member 1 is connected to the adapter A provided in the storage box B is shown. Although simplified in this figure, more specifically, a connector is attached to the tip of each tape, and this connector is connected to the adapter A.

Hereinafter, effects of the optical fiber wiring member 1 of the present embodiment will be described.

In order to handle a large number of signal lines in a lump, a tape coated with a plurality of optical fibers is used. When a plurality of tapes are handled, the covering may be temporarily removed along with replacement or branching of signal lines. In order to facilitate such wiring work, for example, there is a wiring member S in FIG. 11 in which a plurality of optical fibers are pre-wired into one sheet and the end portion is covered in a tape shape. According to this wiring member S, only the tape is connected to the adapter, and the installation work can be facilitated. However, if this wiring member S does not have enough space for installation, the seat portion may interfere with the connection operation. Also, if the length of the tape is shortened in order to secure space, the tape becomes difficult to move and installation work becomes difficult.

The optical fiber wiring member 1 of the present embodiment can overlap the wiring by bending the bending region 31, and can be used effectively even in a narrow space. Further, since the bending region 31 is located at a position deviated from the insertion / extraction direction of the optical fiber with respect to the adapter (the extending direction of the optical fiber at the end), the bending region 31 does not easily interfere with the insertion / extraction. Further, since the optical fiber 11 in the bending region 31 can be bent in various directions, not only the both end portions are easily moved, but also the movement of the wirings at both end portions is less likely to affect each other, so that the installation work can be easily performed. It can be carried out.

In some cases, the internal adapters may not face each other depending on the storage box. For example, from the state shown in FIG. 3, the plurality of optical fibers 11 in the bending region 31 can be twisted to be applied to adapters in various directions. Can be made. In this way, even in a state where the direction of the adapter to be connected is unknown, it can be moved three-dimensionally by bending or twisting the bending region 31. It can also be applied to.

Note that transmission loss may occur depending on the degree of bending of the optical fiber 11 in the bending region 31. In order to prevent this, for example, it is preferable to suppress the optical loss to 0.2 dB or less when the bending region 31 is bent. Further, the length of the optical fiber 11 in the bending region 31 may be equal to or longer than the length obtained by multiplying the bending radius of the optical fiber 11 by the circumferential ratio. In the case of this length, even if the optical fiber 11 is bent by 180 °, the optical fiber 11 does not become less than the bending radius of the optical fiber 11, so transmission loss can be suppressed.

Hereinafter, modifications of the optical fiber wiring member 1 shown in FIG. 1 will be described.

The optical fiber wiring member 1 shown in FIG. 1 is configured so that the wiring of the tape facing each other is a straight wiring when used as shown in FIG. Specifically, the first tape 21 and the fifth tape 25, the second tape 22 and the sixth tape 26, the third tape 23 and the seventh tape 27, and the fourth tape 24 and the eighth tape 28 are respectively in straight wiring. It has become. Here, the wiring from the both ends to the bending region 31 is not limited to the configuration in FIG. This will be described below with reference to the modified examples of FIGS. These modifications are the same as those of the optical fiber wiring member 1 of FIG. 1 in that the wiring of the tapes facing each other is configured as a straight wiring.

First, in the modification of FIG. 5, unlike the configuration of FIG. 1, the first tape 21 and the second tape 22 do not intersect, the third tape 23 and the fourth tape 24 do not intersect, and the fifth tape 25 and the second tape 25. A configuration is adopted in which the six tapes 26 intersect and the seventh tape 27 and the eighth tape 28 intersect. Further, in the modification of FIG. 6, unlike the configuration of FIG. 1, a configuration in which none of the tapes intersect is adopted, and the wiring for the bending region 31 is different from that of FIG. . In the modification of FIG. 7, both ends are wired in the same direction (upward in the figure), but in this case, the wiring of the bending region 31 is twisted so that the right end is oriented. If it changes, it will become the structure similar to the modification of FIG. In any configuration, since the bending region 31 is disposed at a position shifted from the extending direction of the optical fiber at both ends, the same effect as the optical fiber wiring member 1 shown in FIG.

As in the above modification, when the wiring of the plurality of optical fibers 11 in the optical fiber wiring member 1 is matched with the required wiring, the wiring reaching the bending region 31 and the optical fiber 11 in the bending region 31 What is necessary is just to decide wiring and each wiring is not limited. For example, when the wiring reaching the bending region 31 is determined, various wiring patterns can be realized by the wiring of the optical fiber 11 in the bending region 31. Specifically, the wiring of the tapes facing each other can be a cross wiring, or a wiring in which a part of the optical fiber 11 is replaced with a different tape. In this case, it is not necessary to provide a new wiring section. FIG. 8 shows a modification in which the wiring of the optical fiber 11 in the bending region 31 in FIG. 1 is changed and the wiring of the tape facing each other is a cross wiring. FIG. 9 shows a modification in which the wiring of the optical fiber 11 in the bending region 31 in FIG. 1 is changed to a wiring in which a part of the optical fiber 11 is exchanged between different tapes. In the example of FIG. 9, one of the optical fibers 11 of the first tape 21 is one of the optical fibers 11 of the sixth tape 26 and one of the optical fibers 11 of the second tape 22. The book is one of the optical fibers 11 of the eighth tape 28, and one of the optical fibers 11 of the fourth tape 24 is one of the optical fibers 11 of the fifth tape 25. Yes.

In the optical fiber wiring member 1 shown in FIG. 1, the example in which the bending region 31 is provided in the center has been described, but there may be a place where the optical fiber 11 is not covered. It suffices if the region where the optical fiber 11 is not covered is provided as the bending region 31 at a position shifted from the extending direction of the optical fiber at both ends.

Further, in the optical fiber wiring member 1 of FIG. 1, the configuration in which the number of tapes at both ends is the same has been described. For example, the number of tapes on the upper left end side in FIG. 11 may be configured such that the number of tapes at both ends is different.

Further, in the optical fiber wiring member 1 in FIG. 1, the configuration in which the number of optical fibers included in the tape is four has been described. However, for example, the number of optical fibers is limited such as two or eight. Absent. Further, the number of optical fibers included in each tape need not be the same, and may be different.

The optical fiber wiring member 1 in FIG. 1 employs a configuration in which the wiring is bent by 90 ° from both ends to the bending region 31. In providing a region that is not covered with the optical fiber 11 at a position deviated from the extending direction of the optical fiber 11 at both ends, bending is required between the both ends and the bending region 31, The bending angle and the number of times of bending are not limited to the configuration of the optical fiber wiring member 1 shown in FIG.

The optical fiber wiring member 1 shown in FIG. 1 employs a configuration in which the periphery of the optical fiber 11 is almost uniformly covered with a tape-like coating as shown in FIG. It is not limited to. Hereinafter, this point will be described with reference to FIG. FIG. 10A is a modification in which the tape-shaped coating shown in FIG. 2 is thinned on both sides, and FIG. 10B is a modification in which the tape-shaped coating shown in FIG.

In the example of FIG. 10A, a configuration is adopted in which the covering members on both sides of the tape are housed in grooves between the optical fibers 11 (in the sectional view, recessed portions formed by arranging the optical fibers). As a result, the thickness of the tape is reduced as compared with FIG. In this configuration, the tape can be easily bent on either the front side or the back side of the tape, and wiring work can be facilitated.

Further, in the example of FIG. 10B, a configuration in which the covering member on one surface of the tape is housed in the groove between the optical fibers 11 is employed, which is also thicker than FIG. 10A. The thickness of the tape is thinner than that in FIG. In this configuration, the tape can be easily bent to the surface side where the covering member is thinner, wiring work can be facilitated, and stress against twisting can be increased as compared with the configuration shown in FIG.

When adopting a configuration in which the covering member is housed in the groove between the optical fibers, if the plurality of coated optical fibers are in a tape shape, as shown in FIG. It is not necessary to fill all of the grooves with a covering member to make a flat surface. For example, it may be a case where a part of the groove between the optical fibers is filled with a covering member, and in this case, the surface of the tape is wavy. When these configurations are adopted, the optical fiber may be in contact with the surface of the tape, or a part of the optical fiber may be exposed from the surface of the tape.

In the optical fiber wiring member 1 of FIG. 1, the configuration in which the optical fiber 11 is not covered with the tape-like coating in the bending region 31 has been described, but the optical fiber 11 may be an optical fiber.

DESCRIPTION OF SYMBOLS 1 Optical fiber wiring member 11 Optical fiber 21 1st tape 22 2nd tape 23 3rd tape 24 4th tape 25 5th tape 26 6th tape 27 7th tape 28 8th tape 31 Bending area | region 43 Tape coating | cover

Claims

Wired from one end side to the other end side, and provided with a plurality of optical fibers coated in a plurality of tapes parallel to the one end side and the other end side,
The plurality of optical fibers are:
Passing through the bending region deviated from both the extending direction of the plurality of optical fibers on the one end side and the extending direction of the plurality of optical fibers on the other end side,
An optical fiber wiring member which is not covered in the bending region.
The optical fiber wiring member according to claim 1,
An optical fiber wiring member, wherein an optical loss when the plurality of optical fibers in the bending region is bent by 180 ° is 0.2 dB or less.
The optical fiber wiring member according to claim 1,
The length of the plurality of optical fibers in the bending region is equal to or longer than a length obtained by multiplying a bending radius of the optical fiber by a circumferential ratio.
The optical fiber wiring member according to any one of claims 1 to 3,
An optical fiber wiring member, wherein a covering member on one surface or both surfaces of the plurality of optical fibers coated in a plurality of tapes is housed in a groove between the plurality of optical fibers.
The optical fiber wiring member according to any one of claims 1 to 4,
An optical fiber wiring member, wherein an arrangement order of the plurality of optical fibers on the one end side is different from an arrangement order of the plurality of optical fibers on the other end side.