JP6736879B2 - Optical fiber cable identification system and optical fiber cable identification method - Google Patents

Description

The present invention relates to an optical fiber cable, an optical fiber cable identification system, and an optical fiber cable identification method.

Conventionally, when removing a predetermined optical fiber cable from a plurality of installed optical fiber cables, to prevent accidental removal of the optical fiber cable, between the one end and the other end of the optical fiber cable to be removed A continuity test may be performed (see Patent Document 1, for example).

JP 2012-243670 A

However, when removing a given fiber optic cable from a bundle of multiple fiber optic cables, find one end and the other end of the fiber optic cable to be removed (that is, match both ends of the fiber optic cable to be removed). It is difficult, and the continuity test may be repeated many times. Further, the optical fiber cable is often long, and the optical fiber cable (a bundle of a plurality of optical fiber cables) may be twisted during or after the installation. In such a case, it may be more difficult to find one end and the other end of the optical fiber cable to be removed.

An object of the present invention is to provide a technique capable of enhancing the distinguishability of an optical fiber cable to be removed when removing a predetermined optical fiber cable from a plurality of installed optical fiber cables.

According to one aspect of the invention,
Optical fiber for communication,
An outer cover formed of an insulating material and provided on a side circumference of the optical fiber,
A pair of power supply lines for supplying power to the light emitting element when the socket having the light emitting element is attached is provided on the side circumference of the outer cover,
An optical fiber cable is provided in which each of the pair of power supply lines includes a conductor and an insulating layer formed of an insulating material and provided on a side circumference of the conductor.

According to another aspect of the invention,
Optical fiber for communication,
An outer cover formed of an insulating material and provided on a side circumference of the optical fiber,
An optical fiber cable further provided with a pair of power supply lines for supplying electric power to the light emitting element when the socket having the light emitting element is attached, so as to be located slightly inward from the side peripheral surface of the jacket. Will be provided.

According to yet another aspect of the invention,
An optical fiber cable having an optical fiber for communication, an outer cover formed of an insulating material and provided on a side circumference of the optical fiber, and a pair of power supply lines,
It has a light emitting element, is formed so as to be attachable to the laid optical fiber cable, and is configured to be able to conduct the power supply line and the input terminal drawn out from the light emitting element. Socket and
A power supply device for supplying power to the power supply line,
The pair of power supply lines has a conductor and an insulating layer formed of an insulating material and covering the side circumference of the conductor, and is provided on the side circumference of the jacket,
When removing a predetermined optical fiber cable from a plurality of installed optical fiber cables, break the insulating layer of the power supply line of the optical fiber cable to the optical fiber cable to be removed in the installed state. The socket so that the conductor and the input terminal drawn from the light emitting element are electrically connected to each other, power is supplied from the power supply device to the conductor included in the power supply line, and the light emitting element is provided through the conductor. There is provided an optical fiber cable identification system capable of identifying the optical fiber cable to be removed by supplying power to the light emitting element to cause the light emitting element to emit light.

According to yet another aspect of the invention,
An optical fiber for communication, an outer cover made of an insulating material and provided on the side circumference of the optical fiber, and a pair of power supplies provided so as to be located slightly inward from the side peripheral surface of the outer cover. An optical fiber cable having a wire,
It has a light emitting element, is formed so as to be attachable to the laid optical fiber cable, and is configured to be able to conduct the power supply line and the input terminal drawn out from the light emitting element. Socket and
A power supply device for supplying power to the power supply line,
When removing a predetermined optical fiber cable from a plurality of installed optical fiber cables, the power supply line is broken by breaking the outer cover of the optical fiber cable to the optical fiber cable to be removed in the installed state. And the socket is attached so that the input terminal drawn from the light emitting element is electrically connected, and power is supplied from the power supply device to the power supply line, and power is supplied to the light emitting element via the power supply line. An optical fiber cable identification system is provided which enables the light emitting element to emit light to identify the optical fiber cable to be removed.

According to yet another aspect of the invention,
A method of identifying an optical fiber cable for identifying an optical fiber cable to be removed when removing a predetermined optical fiber cable from a plurality of optical fiber cables in a laid state,
A communication optical fiber, an outer cover formed of an insulating material on a side circumference of the optical fiber, a conductor and an insulating layer provided on a side circumference of the conductor, and a side circumference of the outer cover. A pair of power supply lines provided on the socket for supplying electric power to the light emitting element provided in the socket, and an optical fiber cable to be removed which is in a laying state and includes the conductor and the light emitting element included in the power supply line. A step of attaching the socket so as to be electrically connected to the drawn out input terminal;
A step of supplying power from the power supply device to the conductor included in the power supply line, supplying power to the light emitting element via the conductor, causing the light emitting element to emit light, and making it possible to identify the optical fiber cable to be removed. And a fiber optic cable identification method having:

According to yet another aspect of the invention,
A method of identifying an optical fiber cable for identifying an optical fiber cable to be removed when removing a predetermined optical fiber cable from a plurality of optical fiber cables in a laid state,
An optical fiber for communication, an outer cover formed of an insulating material on the side circumference of the optical fiber, and a socket provided so as to be located slightly inward from a side peripheral surface of the outer cover. A pair of power supply lines for supplying power to the light emitting element, and an optical fiber cable to be removed which is in a laid state and is to be electrically connected to the power supply line and the input terminal pulled out from the light emitting element. Attaching the socket,
Supplying power from the power supply device to the power supply line, supplying power to the light emitting element via the power supply line, making the light emitting element emit light and making it possible to identify the optical fiber cable to be removed, A fiber optic cable identification method is provided having.

According to the present invention, when a predetermined optical fiber cable is removed from a plurality of laid optical fiber cables, it is possible to enhance the distinguishability of the optical fiber cable to be removed.

(A) shows an example of the cross-sectional schematic diagram of the optical fiber cable concerning one Embodiment of this invention, (b) shows the modification of the cross-sectional schematic diagram of an optical fiber cable, (c) shows a power supply line. Fig. 1 shows an example of a schematic cross-sectional view of an optical fiber cable before provision of. 1 is a schematic configuration diagram of an optical fiber cable identification system according to an embodiment of the present invention. An example of the cross-sectional schematic of the optical fiber cable concerning other embodiment of this invention is shown.

<One Embodiment of the Present Invention>
(1) Configuration of Optical Fiber Cable The configuration of the optical fiber cable 10 according to the embodiment of the present invention will be described below with reference to FIG.

As shown in FIG. 1A, the optical fiber cable 10 has an optical fiber 1 for communication. The optical fiber 1 has an optical fiber core wire 1a including, for example, a core and a clad provided on the side circumference of the core (provided so as to cover the outer peripheral side surface of the core). Further, the optical fiber 1 may have a tensile strength layer 1b containing a tensile strength fiber such as aramid fiber on the side circumference of the optical fiber core wire 1a. Furthermore, the optical fiber 1 may have the insulating layer 1c formed of an insulating material on the side circumference of the tensile strength layer 1b (on the side circumference of the optical fiber core wire 1a when the tensile strength layer 1b is not provided). Good.

A jacket (sheath) 2 is provided on the side circumference of the optical fiber 1. That is, the jacket 2 is provided so as to cover the outer peripheral side surface of the optical fiber 1. The jacket 2 is made of an insulating material. As the insulating material, for example, a polyolefin resin material such as polyethylene (PE) or polypropylene (PP) can be used.

The optical fiber cable 10 is, for example, a flat cable in which a plurality of optical fibers 1 are arranged in parallel and spaced apart from each other, and a jacket 2 is provided so as to collectively cover the side circumferences of the plurality of optical fibers 1. is there.

The optical fiber cable 10 may further include a tensile strength wire 3. As the tensile strength wire 3, for example, a metal wire such as a steel wire or a fiber reinforced plastic (FRP) such as aramid fiber reinforced plastic (AFRP) or glass fiber reinforced plastic (GFRP) can be used. The tensile strength wire 3 is not limited to being provided in the center of the optical fiber cable 10 as shown in FIG.

The optical fiber cable 10 has a pair of (that is, two) power supply lines 4 and 5. These power supply lines 4 and 5 are lines for supplying power to the light emitting element 21 included in the socket 22 described later, and are lines different from the optical fiber 1 described above.

The power supply lines 4 and 5 are made of, for example, copper wires and are made of an insulating material, and are provided on the side circumferences of the conductors 4a and 5a (cover the outer peripheral side surfaces of the conductors 4a and 5a, respectively). Insulating layers 4b and 5b). For example, existing insulated wires can be used as the power supply lines 4 and 5.

The power supply lines 4 and 5 are provided continuously (without interruption) along the longitudinal direction of the optical fiber cable 10. As a result, the conductors 4a and 5a and the input terminal 21c led out from the light emitting element 21 described later can be electrically connected to each other regardless of the position of the socket 22 described later attached to the optical fiber cable 10.

The power supply lines 4 and 5 are provided on the side circumference of the jacket 2. For example, the power supply lines 4 and 5 are provided such that a part of the outer peripheral side faces of the power supply lines 4 and 5 in the circumferential direction and the outer peripheral side face of the jacket 2 are flush with each other. That is, each of the power supply lines 4 and 5 is provided such that a part of the outer peripheral side surface of each power supply line 4 and 5 is exposed and the other part is covered with the jacket 2. The power supply lines 4 and 5 may be provided, for example, on the side circumference of the jacket 2 as shown in FIG.

When the socket 22 described later is attached to the optical fiber cable 10, for example, at least the insulating layers 4b and 5b are broken in the socket 22 to electrically connect the conductors 4a and 5a and the input terminal 21c pulled out from the light emitting element 21 described later. .. At this time, if the power supply lines 4 and 5 are respectively provided on the side circumferences of the jacket 2, that is, if they are provided near the surface of the optical fiber cable 10, the power supply lines 4 and 5 are provided. It becomes easier to break the insulating layers 4b and 5b in the socket 22 and the like than in the case where the insulating layers 4b and 5b are provided in the central portion. That is, the workability of mounting the socket can be improved.

As shown in FIG. 1C, two grooves 6 and 7 into which the above-described power supply lines 4 and 5 are fitted are formed on the side circumference of the jacket 2 along the longitudinal direction of the jacket 2. ing. The above-mentioned power supply lines 4 and 5 are fitted in the grooves 6 and 7, respectively. The longitudinal direction of the jacket 2 is, for example, when the optical fiber cable 10 is a flat cable, a direction orthogonal to the direction in which the optical fibers 1 are arranged (parallel direction). Thereby, the power supply lines 4 and 5 can be provided after forming the jacket 2. That is, the power supply lines 4 and 5 can be retrofitted. Therefore, the optical fiber cable 10 can be easily formed.

It is preferable that the pair of power supply lines 4 and 5 (for example, the two grooves 6 and 7) are provided so as to be positioned diagonally in the width direction of the optical fiber cable 10. For example, the power supply lines 4 and 5 (for example, the two grooves 6 and 7) are preferably provided on both ends of the flat cable in the major axis direction.

The shapes of the grooves 6 and 7 are such that the power supply lines 4 and 5 can be fitted therein, and the fitted power supply lines 4 and 5 can be prevented from falling out of the grooves. It is preferable.

It is preferable that the insulating layers 4b and 5b have a thickness that can improve the workability of mounting the socket. For example, the thickness of the insulating layers 4b and 5b is preferably such that the insulating layers 4b and 6b can be easily broken by the socket 22 when the socket 22 described later is attached.

In addition, the insulating layers 4b and 5b are preferably formed of a material that is more easily broken than the jacket 2. For example, the Young's modulus of the insulating layers 4b and 5b is preferably lower than the Young's modulus of the jacket 2. This makes it easier to break the insulating layers 4b and 5b in the socket 22 when mounting the socket 22 to be described later, and the workability of mounting the socket described above can be further improved.

As an insulating material for forming such insulating layers 4b and 5b, for example, polyvinyl chloride, low density polyethylene, high density polyethylene, polypropylene or the like can be used.

The above-mentioned optical fiber cable 10 is manufactured as follows. First, a plurality of optical fibers 1 are prepared, and the optical fibers 1 are arranged in parallel. The jacket 2 is formed by providing an insulating material so as to cover the outer peripheral side surfaces of the plurality of optical fibers 1 arranged in parallel. When forming the jacket 2, two grooves 6 and 7 are formed on the side circumference of the jacket 2 along the longitudinal direction of the jacket 2. The two grooves 6 and 7 may be formed after the outer cover 2 is provided. Then, the power supply lines 4 and 5 (for example, insulated wires) having the conductors 4a and 5a and the insulating layers 4b and 5b are fitted into the grooves 6 and 7, respectively. Thereby, the above-mentioned optical fiber cable 10 is formed.

(2) Configuration of Optical Fiber Cable Identification System Next, the configuration of the optical fiber cable identification system according to the embodiment of the present invention will be described with reference to FIG. FIG. 2 is a schematic configuration diagram of the optical fiber cable identification system according to the present embodiment, specifically, a state in which the optical fiber cable identification system according to the present embodiment is provided on the optical fiber cable 10 to be removed in the installed state. The principal part enlarged view is shown.

The optical fiber cable identification system according to the present embodiment, for example, when removing a predetermined optical fiber cable from the plurality of optical fiber cables, identifies the optical fiber cable to be removed from the plurality of installed optical fiber cables. It is a system that enables it. As the optical fiber cable to be removed, the optical fiber cable 10 having the pair of power supply lines 4 and 5 described above can be used.

As shown in FIG. 2, the optical fiber cable identification system 20 according to the present embodiment includes a socket 22 having a light emitting element 21 described later and a power supply device 23 described later. The optical fiber cable 10 to be removed may be included in the optical fiber cable identification system 20.

As the light emitting element 21, for example, an LED or the like can be used. In addition, an input terminal 21c that can be electrically connected to the above-described power supply lines 4 and 5 is drawn from the light emitting element 21.

The socket 22 is formed so that it can be attached to the laid optical fiber cable 10. In addition, the socket 22 is preferably formed so that it can be reattached to the optical fiber cable 10. The socket 22 itself is made of an insulating material. Further, the socket 22 is formed so that the input terminal 21c drawn out from the light emitting element 21 and the above-described power supply lines 4 and 5 of the optical fiber cable 10 can be electrically conducted.

Further, it is preferable that the socket 22 is formed so that the insulating layers 4b and 5b can be broken when the socket 22 is attached to the optical fiber cable 10. Thereby, the workability of mounting the socket described above can be further improved.

The socket 22 preferably includes two light emitting elements 21a and 21b. Each of these light emitting elements 21a and 21b is provided such that the direction of the current flowing through one light emitting element 21a is opposite to the direction of the current flowing through the other light emitting element 21b. That is, in each of the two light emitting elements 21a and 21b, when the direction of the current flowing through the one light emitting element 21a is the + direction, the direction of the current flowing through the other light emitting element 21b is the − direction which is the opposite direction to the + direction. Is provided in the socket 22. As a result, for example, even when the optical fiber cable 10 is twisted at the time of installation or after installation and the + direction and the-direction are lost, either of the two light emitting elements 21a and 21b is caused to emit light. You can That is, it is possible to improve the identifiability of the optical fiber cable 10 to be removed in the installed state. Further, since it is not necessary to confirm the direction of the light emitting element 21 when mounting the socket 22, the workability of mounting the socket can be further improved.

The optical fiber cable identification system 20 includes a power supply device 23 that supplies power to the power supply lines 4 and 5 included in the optical fiber cable 10. The power supply device 23 is configured to be able to supply power in both the + direction and the-direction described above, or can be configured to perform power supply by switching the + direction and the-direction in time division, that is, AC power supply. Is preferred. When the socket 22 is provided with the two light emitting elements 21a and 21b as described above, the power feeding device 23 supplies the power in at least one of the + direction power (current) and the − direction power (current). It suffices if it is configured to be able to supply (current).

(3) Optical Fiber Cable Identification Method Next, an optical fiber cable identification method using the above-described optical fiber cable identification system 20 will be described. The optical fiber cable identification method according to the present embodiment is a method of identifying an optical fiber cable to be removed when a predetermined optical fiber cable is removed from a plurality of installed optical fiber cables.

A socket 22 having a light emitting element 21 is attached to an optical fiber cable 10 which is a predetermined optical fiber cable to be removed from a plurality of installed optical fiber cables and which has the power supply lines 4 and 5 described above. At this time, the socket 22 is attached to the optical fiber cable 10 to be removed so that the power supply lines 4 and 5 (conductors 4a and 5a) and the input terminal 21c drawn from the light emitting element 21 are electrically connected. Specifically, the insulating layers 4b, 5b of the power supply lines 4, 5 of the optical fiber cable 10 to be removed are broken by the socket 22, and the conductors 4a, 5a and the input terminal 21c drawn out from the light emitting element 21 are electrically connected. To conduct electricity.

The power feeding device 23 is connected to (the conductors 4a and 5a of) the optical fiber cable 10 to be removed. Then, power is supplied from the power feeding device 23 to the conductors 4a and 5a. The power supplied to the conductors 4a and 5a is supplied to the light emitting element 21 via the conductors 4a and 5a, and the light emitting element 21 emits light. It is possible to identify the optical fiber cable 10 to be removed by using the light emitting element 21 emitting light as a mark.

For example, in the optical fiber cable identification system 20 according to the present embodiment, the socket 22 can be attached to the central portion of the optical fiber cable 10 in the longitudinal direction. That is, when removing the optical fiber cable 10, first, the socket 22 is attached to the central portion in the longitudinal direction of the optical fiber cable 10 to allow the light emitting element 21 to emit light. Thereby, a worker who removes the optical fiber cable 10 can cut the optical fiber cable 10 into two parts with the light emitting element 21 emitting light as a mark. As a result, for example, two workers can wind up the optical fiber cable 10 from both ends of the optical fiber cable 10, and the efficiency of the work of removing the optical fiber cable 10 can be improved.

(4) Effects of this Embodiment According to this embodiment, one or more of the following effects are exhibited.

(A) By providing a pair of power supply lines 4 and 5 for supplying electric power to the light emitting element 21, the socket 22 having the light emitting element 21 is attached to the optical fiber cable 10 to be removed in the installed state, and the light emitting element 21 is attached. Can be made to emit light. For example, the light emitting element 21 can be made to emit light by attaching the socket 22 also to a midway portion (a portion other than both ends) of the optical fiber cable 10 to be removed in the laid state. Thereby, the distinguishability of the optical fiber cable 10 scheduled to be removed can be improved. Therefore, for example, when removing a predetermined optical fiber cable from a bundle of a plurality of optical fiber cables, erroneous removal of the optical fiber cable can be suppressed. Further, the conventional continuity test is not required, and the time for removing the optical fiber cable 10 can be shortened.

(B) By providing the power supply lines 4 and 5 on the side circumference of the jacket 2 (that is, near the surface of the jacket 2), when the socket 22 is attached to the optical fiber cable 10 to be removed, power is supplied by the socket 22. It becomes easy to break the insulating layers 4b and 5b of the lines 4 and 5. For example, when the socket 22 is attached, the insulating layer 4b, 5b can be broken only by the contact of the socket 22 with the optical fiber cable 10 and rubbing.

(C) Grooves 6 and 7 are formed on the side circumference of the jacket 2 along the longitudinal direction of the jacket 2, and the power supply lines 4 and 5 are fitted in the grooves 6 and 7, respectively. The power supply lines 4 and 5 can be provided after forming the jacket 2. Thereby, the optical fiber cable 10 can be easily formed.

(D) Two light-emitting elements 21 are provided in the socket 22, or the power can be supplied in both the + direction and the − direction, or the power can be supplied by switching the + direction and the − direction in time division. Even if the optical fiber cable 10 is twisted at the time of laying or after laying, and the + direction and the-direction are not known, the light emitting element 21 (21a, 21b) is used by using the power feeding device 23 provided. ) Can be reliably emitted. Thereby, the distinguishability of the optical fiber cable 10 scheduled to be removed can be further enhanced.

(E) In many cases, the operator removes the optical fiber cable 10 in the installed state by gradually winding up the optical fiber cable 10 from one end of the optical fiber cable 10 in the installed state. Therefore, since the socket 22 is formed so that it can be reattached, the optical fiber cable 10 to be removed is wound up to some extent and removed, and then the socket 22 is reattached to another place, and the optical fiber cable 10 to be removed is removed to some extent. Can be rolled up. Thereby, the optical fiber cable 10 can be removed at a lower cost.

(F) The optical fiber cable identification system 20 according to the present embodiment is particularly effective when the optical fiber cable 10 to be removed is long.

(Other Embodiments of the Present Invention)
Although one embodiment of the present invention has been specifically described above, the present invention is not limited to the above-described embodiment and can be appropriately modified without departing from the scope of the invention.

Although the pair of power supply lines 4 and 5 are provided on the side circumferences of the jacket 2 in the above embodiment, the present invention is not limited to this. For example, as shown in FIG. 3, the pair of power supply lines 4 and 5 may be provided so as to be located slightly inward from the side peripheral surface of the jacket 2. In this case, each of the pair of power supply lines 4 and 5 is preferably a line having only the conductors 4a and 5a (that is, a wire). That is, the conductors 4a and 5a may be slightly embedded in the jacket 2 without providing the insulating layers 4b and 5b.

In such an optical fiber cable 10A, when the socket 22 is attached, at least the outer cover 2 is broken by the socket 22 and the like so that the conductors 4a and 5a are electrically connected to the input terminal 21c drawn from the light emitting element 21. Therefore, when the socket 22 is attached to the optical fiber cable 10A, the thickness t of the thinnest portion of the outer cover 2 is set so that the outer cover 2 can be easily broken by the socket 22 and the like and the workability of attaching the socket is improved. The thinner one is preferable.

Even with such an optical fiber cable 10A, the same effect as that of the above-described embodiment can be obtained.

In addition, also in the optical fiber cable 10A, wires having conductors 4a and 5a and insulating layers 4b and 5b may be used as the power supply wires 4 and 5.

In the above-described embodiment, the case where the socket 22 has two light emitting elements, that is, the light emitting element 21a connected in the + direction and the light emitting element 21b connected in the − direction, is not limited to this. .. For example, the socket may have only one light emitting element. In this case, it is preferable that the power supply device is configured to supply power in both the + direction and the − direction described above, or configured to supply power by switching the + direction and the − direction in time division. The + direction here is the direction of the current emitted by one light emitting element provided in the socket, and the − direction is the direction of the current opposite to the + direction, that is, the light emitting element does not emit light. The direction of current flow. Also by this, the same effect as (d) of the above-described embodiment can be obtained.

In the above embodiment, the case where one socket 22 is attached to the optical fiber cable to be removed has been described as an example, but the present invention is not limited to this. That is, two or more sockets 22 may be attached to the optical fiber cable to be removed. As a result, it is possible to further improve the distinguishability of the optical fiber cable to be removed.

In the above embodiment, the case where the optical fiber cable 10 is a flat cable has been described as an example, but the present invention is not limited to this. The optical fiber cable 10 may be a round cable (that is, a cable having a circular cross section).

Further, the optical fiber cable 10 is not limited to the case where it has a plurality of optical fibers 1. That is, the present invention can be applied even to an optical fiber cable having one optical fiber 1.

<Preferred embodiment of the present invention>
Hereinafter, the preferred embodiments of the present invention will be additionally described.

[Appendix 1]
According to one aspect of the invention,
Optical fiber for communication,
An outer cover formed of an insulating material and provided on a side circumference of the optical fiber,
A pair of power supply lines for supplying power to the light emitting element when the socket having the light emitting element is attached is provided on the side circumference of the outer cover,
An optical fiber cable is provided in which each of the pair of power supply lines includes a conductor and an insulating layer formed of an insulating material and provided on a side circumference of the conductor.

[Appendix 2]
The optical fiber cable of Appendix 1, preferably,
Two grooves are formed along the longitudinal direction on the side circumference of the jacket,
The pair of power supply lines are fitted in the two grooves, respectively.

[Appendix 3]
The optical fiber cable according to appendix 1 or 2, preferably,
The insulating layer is formed of a material that is more easily broken than the outer cover.

[Appendix 4]
The optical fiber cable according to any one of appendices 1 to 3, preferably,
The Young's modulus of the insulating layer is lower than the Young's modulus of the jacket.

[Appendix 5]
According to another aspect of the invention,
Optical fiber for communication,
An outer cover formed of an insulating material and provided on a side circumference of the optical fiber,
An optical fiber cable further provided with a pair of power supply lines for supplying electric power to the light emitting element when the socket having the light emitting element is attached, so as to be located slightly inward from the side peripheral surface of the jacket. Will be provided.

[Appendix 6]
The optical fiber cable of Appendix 5, preferably,
Each of the pair of power supply lines includes a conductor and an insulating layer formed of an insulating material and provided on a side circumference of the conductor.

[Appendix 7]
The optical fiber cable according to any one of appendices 1 to 6, preferably,
A plurality of the optical fibers are arranged in parallel and spaced apart from each other, the jacket is a flat cable provided to collectively cover the side circumference of the plurality of optical fibers,
The pair of power supply lines (the two grooves) are respectively provided so as to be located at diagonals in the major axis direction of the flat cable.

[Appendix 8]
According to yet another aspect of the invention,
An optical fiber cable having an optical fiber for communication, an outer cover formed of an insulating material and provided on a side circumference of the optical fiber, and a pair of power supply lines,
It has a light emitting element, is formed so as to be attachable to the laid optical fiber cable, and is configured to be able to conduct the power supply line and the input terminal drawn out from the light emitting element. Socket and
A power supply device for supplying power to the power supply line,
The pair of power supply lines has a conductor and an insulating layer formed of an insulating material and covering the side circumference of the conductor, and is provided on the side circumference of the jacket,
When removing a predetermined optical fiber cable from a plurality of installed optical fiber cables, break the insulating layer of the power supply line of the optical fiber cable to the optical fiber cable to be removed in the installed state. The socket so that the conductor and the input terminal drawn from the light emitting element are electrically connected to each other, power is supplied from the power supply device to the conductor included in the power supply line, and the light emitting element is provided through the conductor. There is provided an optical fiber cable identification system capable of identifying the optical fiber cable to be removed by supplying power to the light emitting element to cause the light emitting element to emit light.

[Appendix 9]
According to yet another aspect of the invention,
An optical fiber for communication, an outer cover made of an insulating material and provided on the side circumference of the optical fiber, and a pair of power supplies provided so as to be located slightly inward from the side peripheral surface of the outer cover. An optical fiber cable having a wire,
It has a light emitting element, is formed so as to be attachable to the laid optical fiber cable, and is configured to be able to conduct the power supply line and the input terminal drawn out from the light emitting element. Socket and
A power supply device for supplying power to the power supply line,
When removing a predetermined optical fiber cable from a plurality of installed optical fiber cables, the power supply line is broken by breaking the outer cover of the optical fiber cable to the optical fiber cable to be removed in the installed state. And the socket is attached so that the input terminal drawn from the light emitting element is electrically connected, and power is supplied from the power supply device to the power supply line, and power is supplied to the light emitting element via the power supply line. An optical fiber cable identification system is provided which enables the light emitting element to emit light to identify the optical fiber cable to be removed.

[Appendix 10]
The optical fiber cable identification system according to appendix 8 or 9, preferably,
Two light emitting elements are provided in the socket,
Each of the two light emitting elements is provided so that the direction of the current flowing through one of the light emitting elements is opposite to the direction of the current flowing through the other light emitting element.

[Appendix 11]
The optical fiber cable identification system according to any one of appendices 8 to 10, preferably,
When one light emitting element is provided and the direction of the current emitted by the light emitting element is the + direction, and the direction of the current flowing in the opposite direction to the + direction is the − direction, the power feeding device is in the + direction. Is configured to be able to supply power also in the − direction, or configured to be able to supply power by switching the + direction and the − direction in time division.

[Appendix 12]
According to yet another aspect of the invention,
A method of identifying an optical fiber cable for identifying an optical fiber cable to be removed when removing a predetermined optical fiber cable from a plurality of optical fiber cables in a laid state,
A communication optical fiber, an outer cover formed of an insulating material on a side circumference of the optical fiber, a conductor and an insulating layer provided on a side circumference of the conductor, and a side circumference of the outer cover. A pair of power supply lines provided on the socket for supplying electric power to the light emitting element provided in the socket, and an optical fiber cable to be removed which is in a laying state and includes the conductor and the light emitting element included in the power supply line. A step of attaching the socket so as to be electrically connected to the drawn out input terminal;
A step of supplying power from the power supply device to the conductor included in the power supply line, supplying power to the light emitting element via the conductor, causing the light emitting element to emit light, and making it possible to identify the optical fiber cable to be removed. And a fiber optic cable identification method having:

[Appendix 13]
According to yet another aspect of the invention,
A method of identifying an optical fiber cable for identifying an optical fiber cable to be removed when removing a predetermined optical fiber cable from a plurality of optical fiber cables in a laid state,
An optical fiber for communication, an outer cover formed of an insulating material on the side circumference of the optical fiber, and a socket provided so as to be located slightly inward from a side peripheral surface of the outer cover. A pair of power supply lines for supplying power to the light emitting element, and an optical fiber cable to be removed which is in a laid state and is to be electrically connected to the power supply line and the input terminal pulled out from the light emitting element. Attaching the socket,
Supplying power from the power supply device to the power supply line, supplying power to the light emitting element via the power supply line, making the light emitting element emit light and making it possible to identify the optical fiber cable to be removed, A fiber optic cable identification method is provided having.

10 optical fiber cable 1 optical fiber 2 jacket 4, 5 power supply line 20 optical fiber cable identification system 21 light emitting element 22 socket 23 power supply device

Claims (4)

An optical fiber cable having an optical fiber for communication, an outer cover formed of an insulating material and provided on a side circumference of the optical fiber, and a pair of power supply lines,
It has a light emitting element, is formed so as to be attachable to the laid optical fiber cable, and is configured to be able to conduct the power supply line and the input terminal drawn out from the light emitting element. Socket and
A power supply device for supplying power to the power supply line,
Said pair of power supply lines, and an insulating layer formed of an insulating material exhibiting a Young's modulus lower than the outside of the conductor to cover the side circumference of the conductor, provided in the envelope of the side periphery on Has been
When removing a predetermined optical fiber cable from a plurality of optical fiber cables in the laid state, the optical fiber cable to be removed in the laid state, the insulating layer that the power supply line of the optical fiber cable has The socket is attached so as to bring the conductor and the input terminal drawn out from the light emitting element into conduction by breaking the socket, and power is supplied from the power supply device to the conductor included in the power supply line, and the conductor is provided. An optical fiber cable identification system capable of identifying the optical fiber cable to be removed by supplying electric power to the light emitting element to cause the light emitting element to emit light. Two light emitting elements are provided in the socket,
The optical fiber cable identification system according to claim 1, wherein each of the two light emitting elements is provided such that a direction of a current flowing through one light emitting element is opposite to a direction of a current flowing through the other light emitting element. When one light emitting element is provided and the direction of the current emitted by the light emitting element is the + direction, and the direction of the current flowing in the opposite direction to the + direction is the − direction, the power feeding device is in the + direction. 3. The optical fiber cable identification system according to claim 1, wherein the optical fiber cable identification system according to claim 1 or 2 is configured to be able to supply power also in the − direction, or configured to supply power by switching the + direction and the − direction in time division. A method of identifying an optical fiber cable for identifying an optical fiber cable to be removed when removing a predetermined optical fiber cable from a plurality of optical fiber cables in a laid state,
An optical fiber for communication, an outer cover made of an insulating material and provided on the side circumference of the optical fiber, and a conductor and an outer circumference of the conductor formed of an insulating material having a Young's modulus lower than that of the outer cover. A pair of power supply lines having an insulating layer provided on the outer circumference of the jacket and supplying power to a light emitting element included in the socket, and the optical fiber cable to be removed in a laying state. In, a step of breaking the insulating layer of the power supply line at the socket to attach the socket so that the conductor of the power supply line and the input terminal drawn from the light emitting element are electrically connected,
A step of supplying power from the power supply device to the conductor included in the power supply line, supplying power to the light emitting element via the conductor, causing the light emitting element to emit light, and making it possible to identify the optical fiber cable to be removed. An optical fiber cable identification method having:

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