JP2015108756A - Optical fiber unit, optical fiber cable, and manufacturing method of optical fiber unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a specific coated optical fiber to be easily identified from multiple coated optical fibers.SOLUTION: An optical fiber unit 20 is configured such that multiple coated optical fiber tapes 10, each of which has multiple coated optical fibers arranged in parallel in a row and the adjacent coated optical fibers intermittently coupled to each other by coupling portions and non-coupling portions in a longitudinal direction, are tied in a bundle. The coated optical fiber tapes 10 are intermittently provided with color bands 5 in the longitudinal direction, and either or both of an interval and a color of the color bands 5 are different from each other in the multiple coated optical fiber tapes 10.

Description

  The present invention relates to an optical fiber unit including a plurality of optical fiber ribbons in which a plurality of optical fiber cores are arranged and adjacent optical fiber cores are intermittently connected to each other, and a light including a plurality of optical fiber units. Related to fiber cable.

  In an optical fiber ribbon integrated with a plurality of optical fibers arranged in a parallel line, it is easy to separate the optical fibers into a single core and maintain the holding state of the tape. An optical fiber ribbon capable of performing multi-fiber batch fusion connection or the like is known. In this optical fiber ribbon, a plurality of optical fiber cores are arranged in a parallel row, and connecting portions and non-connecting portions are alternately formed in the longitudinal direction, and adjacent optical fiber core wires are intermittently connected to each other. Various shapes and manufacturing methods have been proposed, which are connected shapes.

  For example, in Patent Document 1, 2N optical fibers are arranged in parallel and adjacent optical fibers are intermittent in the longitudinal direction. An optical fiber ribbon that is connected is disclosed. This optical fiber ribbon has a length L1 first connection of an optical fiber pair composed of a (2n-1) th optical fiber and a 2nth optical fiber from one end side in the tape width direction and provided at a distance S1. Connect by part. In addition, an optical fiber pair composed of a 2m-th optical fiber and a (2m + 1) -th optical fiber (m: natural number less than (N-1)) from one end side in the tape width direction is provided with a length L2 provided at a distance S2. It connects with the 2nd connection part. L1, S1, L2, and S2 satisfy L1> S1 and L2 <S2. Thereby, it is said that the optical fiber cable accommodating the optical fiber ribbon can be reduced in diameter and density, and the intermediate post branching operation can be facilitated.

  Patent Document 2 discloses an optical fiber ribbon made of three or more optical fibers arranged in parallel. In this optical fiber ribbon, a plurality of connecting portions that connect only two adjacent optical fibers are intermittently arranged two-dimensionally in the longitudinal direction and the width direction of the optical fiber ribbon. Yes. And the length of the connection part given to the same optical fiber is constituted shorter than the length of the non-connection part of the same optical fiber, and the connection parts adjacent in the width direction of the optical fiber ribbon are in contact with each other In order to avoid this, a separation distance is provided. As a result, the optical fiber cable can be reduced in density, diameter and weight, and the optical fiber can be easily connected at the time of intermediate branching.

JP 2011-169937 A JP 2007-279226 A

  Like the optical fiber ribbons described in Patent Document 1 and Patent Document 2 above, a plurality of optical fiber cores are arranged in a row, and connected portions and non-connected portions are formed alternately and adjacent to each other. Optical fiber ribbons with intermittently connected optical fiber cores can be easily separated from each other, and the optical fiber tape cores can be kept in a multi-fiber batch fusion connection etc. Has the advantage that can be performed.

  When a desired optical fiber core is taken out from such an optical fiber tape core in an intermediate post-branching operation or the like, it is necessary to identify a specific optical fiber core. For this reason, conventionally, for example, a plurality of optical fibers constituting one optical fiber ribbon are colored different colors, and the combination of the optical fibers is different among the plurality of optical fiber ribbons. I have to. Thereby, when taking out a desired optical fiber core wire from an optical fiber tape core wire, an optical fiber core wire can be identified with the coloring color of an optical fiber core wire.

  However, when the number of optical fiber cores constituting the optical fiber ribbon increases, it becomes difficult to color all the optical fiber cores with different colors, and multiple optical fiber core wires are colored with the same color. I have to do it. In this case, it becomes difficult to easily identify a specific optical fiber.

  Also, in an optical cable using an optical fiber ribbon, a plurality of optical fiber ribbons are accommodated in a slot groove, or a plurality of optical fiber ribbons are bundled and wound around by holding a presser winding. The thing of the structure coat | covered with is used. In the optical cable having such a configuration, it is necessary to identify each optical fiber core wire in order to take out one optical fiber from a plurality of optical fiber tape core wires. Also in this case, it is necessary to identify a specific optical fiber ribbon from a large number of optical fiber ribbons, and further to identify a specific optical fiber core from among them. However, when the number of optical fiber ribbons increases or the number of optical fiber cores constituting the optical fiber ribbon increases, it is not easy to easily identify a specific optical fiber.

  The present invention has been made in view of the above-described circumstances, and has a connection structure in which a plurality of optical fiber cores are arranged in a parallel row, and adjacent optical fiber cores are intermittently connected in the longitudinal direction. An optical fiber unit having a plurality of optical fiber cores, an optical fiber unit that can easily identify a specific optical fiber core from a plurality of optical fiber cores, an optical fiber cable having the optical fiber unit, and The purpose is to provide an optical fiber unit.

  An optical fiber unit according to the present invention includes an optical fiber tape core in which a plurality of optical fiber cores are arranged in a parallel row, and adjacent optical fiber cores are intermittently connected in a longitudinal direction by a connecting part and a non-connecting part. An optical fiber unit in which a plurality of wires are bundled, and the optical fiber ribbon is provided with a color band intermittently in a longitudinal direction, and in the plurality of optical fiber ribbons, an interval and a color of the color band These are optical fiber units in which either or both are different from each other.

  An optical fiber cable according to the present invention is an optical fiber cable including a plurality of the above optical fiber units, wherein the optical fiber unit is a bundle of the plurality of optical fiber ribbons with two bundle materials, The plurality of optical fiber units are optical fiber cables in which the combination of colors of the two bundle members is different from each other.

  The method of manufacturing an optical fiber unit according to the present invention is a light in which a plurality of optical fiber cores are arranged in a parallel row, and adjacent optical fiber cores are intermittently connected in the longitudinal direction by a connecting part and a non-connecting part. A method of manufacturing an optical fiber unit in which a plurality of optical fiber ribbons are bundled, wherein the optical fiber ribbon is provided with a color band intermittently in a longitudinal direction, and the plurality of optical fiber ribbons includes the color This is a method of manufacturing an optical fiber unit in which either or both of the band interval and the color are different from each other.

  According to the present invention, an optical fiber having a plurality of optical fiber ribbons having a connection structure in which a plurality of optical fiber cores are arranged in parallel and adjacent optical fiber cores are intermittently connected in the longitudinal direction. An optical fiber unit that can easily identify a specific optical fiber core from a plurality of optical fiber cores, an optical fiber cable having the optical fiber unit, and an optical fiber unit can be provided. .

It is a figure explaining the intermittent connection structure of the optical fiber ribbon with which the optical fiber unit of this invention is provided. It is another figure explaining the intermittent connection structure of the optical fiber ribbon with which the optical fiber unit of this invention is provided. It is another figure explaining the intermittent connection structure of the optical fiber ribbon with which the optical fiber unit of this invention is provided. It is a figure which shows embodiment of the optical fiber tape core wire which gave the color belt and was made identifiable. It is another figure which shows embodiment of the optical fiber tape core wire which gave the color belt and was identifiable. It is a figure which shows an example of the manufacturing apparatus of the optical fiber tape core wire which comprises the optical fiber unit by this invention. It is a figure which shows the structural example of the intermittent processing apparatus which forms a non-connecting part intermittently in an optical fiber ribbon. It is a figure which shows the structural example of the intermittent processing apparatus which forms a non-connecting part intermittently in an optical fiber ribbon. It is a figure explaining the cutting blade which forms the connection part of an optical fiber ribbon. It is another figure explaining the cutting blade which forms the connection part of an optical fiber tape core wire. It is a figure which shows the structural example of the optical fiber unit by this invention. It is sectional drawing which shows the structural example of the optical fiber cable which mounted the optical fiber tape core wire.

First, embodiments of the present invention will be listed and described.
The invention relating to the optical fiber tape unit of the present application,
(1) A plurality of optical fiber cores are arranged in a parallel row, and a plurality of optical fiber ribbons in which adjacent optical fiber cores are intermittently connected in the longitudinal direction by a connecting part and a non-connecting part are bundled. In the optical fiber unit, the optical fiber ribbon is intermittently provided with a color band in a longitudinal direction, and in the plurality of optical fiber ribbons, either or both of the color band interval and color Are optical fiber units different from each other. Thereby, a specific optical fiber ribbon can be easily identified from a plurality of optical fiber ribbons, and a desired optical fiber can be easily taken out from the optical fiber ribbon.

Invention relating to the optical fiber cable of the present application,
(1) An optical fiber cable including a plurality of the above optical fiber units, wherein the optical fiber unit is formed by bundling the plurality of optical fiber ribbons with two bundle members, and the plurality of optical fiber units. Is an optical fiber cable in which the color combinations of the two bundle materials are different from each other. Thereby, a specific optical fiber unit can be easily identified from a plurality of optical fiber units, and a desired optical fiber core wire can be easily taken out from the optical fiber unit.

The invention relating to the manufacturing method of the optical fiber unit of the present application is
(1) In the method of manufacturing an optical fiber unit according to the present invention, a plurality of optical fiber cores are arranged in a parallel row, and adjacent optical fiber cores are intermittently connected in a longitudinal direction by a connecting part and a non-connecting part. A method of manufacturing an optical fiber unit in which a plurality of optical fiber ribbons connected to each other are bundled, wherein the optical fiber ribbon is provided with a color band intermittently in a longitudinal direction, A method of manufacturing an optical fiber unit, wherein either or both of the color band interval and the color are different from each other. Thus, a specific optical fiber ribbon can be easily identified from a plurality of optical fiber ribbons, and a desired optical fiber can be easily taken out from the optical fiber ribbon. An optical fiber unit can be obtained.

[Details of the embodiment of the present invention]
Specific examples of an optical fiber unit, an optical fiber cable, and an optical fiber unit manufacturing method according to the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and includes all the changes within the meaning and range equivalent to a claim.

1A to 1C are diagrams for explaining an intermittent connection structure of optical fiber ribbons included in an optical fiber unit of the present invention, in which 1 is an optical fiber core, 2 is a common coating, and 3 is a non-connection portion. Reference numeral 4 denotes a connecting portion, and 10 denotes an optical fiber ribbon (tape ribbon).
As the optical fiber core 1, for example, a so-called optical fiber strand in which a glass fiber having an outer diameter of 125 μm and a coating diameter of about 250 μm is applied can be used. In order to identify a line, a fiber coating with a colored layer on the outer surface can be used.
The optical fiber ribbon 10 is formed by arranging a plurality of optical fibers 1 in a parallel line and integrating them with a common coating 2 into a tape shape. The thing of the form by which the non-connection part 3 and the connection part 4 of predetermined length are alternately formed between the lines 1 is said.

  As shown in FIG. 1A, a non-connecting portion 3 is formed in the common coating 2 of the optical fiber ribbon 10 by cutting through the upper and lower surfaces of the optical fiber ribbon 10. In the cut portion, adjacent optical fiber cores are separated from each other, and the operator pulls the optical fiber cores 1 in a direction (a direction perpendicular to the longitudinal direction) to separate the optical fibers. The fiber core wire 1 can be bent and separated. On the other hand, in the connection part 4 which is not cut | disconnected, adjacent optical fiber core wires are united with each other by the common coating | cover 2, and a tape state is hold | maintained.

1B and 1C show other examples of the cross-sectional shape of the optical fiber ribbon. The optical fiber ribbon 10 in FIG. 1A is formed so that both surfaces of the common coating 2 are along the outer surface of the optical fiber 1, but in the case of FIG. 1B, one surface of the common coating 2 is It is corrugated so that the outer surface of the optical fiber core wire 1 may be followed, and the other surface is shape | molded flatly. Moreover, in FIG. 1C, both surfaces of the common coating | cover 2 are shape | molded flat.
Further, in each of the above configuration examples, the optical fiber cores 1 are arranged close to each other in parallel, but the adjacent optical fiber cores 1 are spaced apart by a predetermined distance, and the optical fiber core wires are separated by the common coating 2. The structure which connects may be sufficient.

  FIG. 2A and FIG. 2B are diagrams showing an embodiment of an optical fiber ribbon that can be identified by giving a color band, and FIG. 2A shows the optical fiber ribbon before forming an unconnected portion by cutting. FIG. 2B is a diagram illustrating the optical fiber ribbon after forming a non-connection portion by cutting.

  In FIG. 2A, a plurality of optical fiber cores 1 are arranged in a parallel line, and a coating layer of the common coating 2 is formed around them. The optical fiber cores 1 arranged in a parallel line are provided with a colored layer on the outermost periphery, and the optical fiber cores in one optical fiber tape core 10 are made different in color from each optical fiber core 1. Allows identification of line 1. The colored layer is formed by coating and molding a colored resin.

  Then, a color band 5 having a predetermined length in the longitudinal direction is applied to the entire arrangement direction of the optical fiber cores 1 arranged in a parallel row at a predetermined interval in the longitudinal direction. The color band 5 can be formed by applying a coloring material such as colored resin or ink to the optical fiber ribbon 10 coated with the common coating 2. By giving the color band 5 before the formation of the unconnected portion 3 by cutting, the color band 5 can be reliably given to the region of the full width in the arrangement direction.

  The color band 5 is assigned to identify the optical fiber ribbon 10 in an optical fiber unit including a plurality of optical fiber ribbons 10. In this case, the optical fiber tape core wire 10 can be identified by changing the interval of the color band 5 for each optical fiber tape core wire 10. When the interval of the color band 5 is changed, the interval of the color band 5 can be set so that the optical fiber ribbon 10 can be identified by the number of the group of color bands 5. For example, as shown in FIG. 2A, two color bands 5 that are relatively close to each other in the longitudinal direction are arranged, and the interval between the color bands 5 is set so that the two color bands 5 repeatedly appear in the longitudinal direction. The interval between the color bands 5 is set so that the number of the two color bands changes for each optical fiber ribbon 10.

In addition, the optical fiber ribbon 10 can be identified by changing the color of the color band 5 for each optical fiber ribbon 10. By visually recognizing the color of the color band, the operator can identify the desired optical fiber ribbon 10.
Or you may enable it to identify the optical fiber ribbon 10 using the space | interval and color of the color band 5 together. In this case, for example, a plurality of optical fiber ribbons 10 can be identified by using a plurality of color bands 5 and changing the interval of the color bands 5 even for the same color.

  2B shows an optical fiber ribbon 10 in which a cut is provided in the common coating 2 of FIG. 2A and an unconnected portion 3 and a connected portion 4 are intermittently provided between adjacent optical fibers 1. Yes. The optical fiber tape core 10 is provided with the non-connecting portion 3 and the connecting portion 4 intermittently, thereby maintaining the tape shape and facilitating separation of the optical fiber core wire 1 in an intermediate post-branching operation or the like. Yes.

In the optical fiber ribbon 10 in which the intermittently connected structure is formed by cutting, a colored portion by the color band 5 is formed on the common coating 2 around each optical fiber 1. In FIG. 2B, the color band 5 is given to the connecting part 4. Depending on the situation, it can be given appropriately.
An operator or the like can identify the target optical fiber tape core wire 10 from the plurality of optical fiber tape core wires 10 by visually recognizing the interval or color of the color band 5 of the optical fiber tape core wire 10; A specific optical fiber core wire 1 can be taken out from the identified optical fiber tape core wire 10 by a colored layer applied to each optical fiber core wire 1.

FIG. 3 is a diagram showing an example of an apparatus for manufacturing an optical fiber ribbon constituting the optical fiber unit according to the present invention.
The manufacturing apparatus 100 for the optical fiber ribbon 10 has a supply 101, and the optical fiber 1 is fed out from a plurality of reels 102. The optical fiber cores 1 are each provided with a colored layer of a different color on the outermost periphery. The plurality of optical fiber cores 1 fed out are given a predetermined tension by the dancer roller 103, and are sent to the concentrating roller 105 through the conveying roller 104.

  In the concentrating roller 105, a plurality of grooves (not shown) that allow the optical fiber cores 1 to pass therethrough are arranged at predetermined intervals. Thereby, the several optical fiber core wire 1 is concentrated and it is made to parallel in a parallel line. A coating device 110 for forming the common coating 2 around the optical fiber core wire 1 is provided below the concentrating roller 105. The coating device 110 includes an application device 112 that applies an ultraviolet curable resin (taped resin) supplied from the resin storage tank 111 to the optical fiber core wire 1, and an ultraviolet irradiation device that irradiates the applied resin with ultraviolet rays and cures the applied resin. 113. The plurality of optical fiber cores 1 that have passed through the coating device 110 are integrated by forming a common coating 2 with an ultraviolet curable resin. Here, as the common coating 2, by using a transparent ultraviolet curable resin, the colored layer applied to the outer periphery of each optical fiber core wire 1 can be visually recognized from the outside through the common coating 2.

  In addition, the coating apparatus 110 may coat a thermoplastic resin instead of an ultraviolet curable resin as a taped resin for forming the common coating 2. In this case, the coating apparatus 110 includes an extruder that extrudes a thermoplastic resin and a cooling device that cools the extruded resin.

  A turn roller 114 is provided below the coating device 110, and on the side of the turn roller 114, a feed capstan 115, a color band applying device 116, a winding tension control dancer 117, an intermittent processing device 118, and a winding device are provided. 119 is provided. The plurality of optical fiber cores 1 coated and integrated with the common coating 2 are pulled by the delivery capstan 115 after the direction of the traveling line is changed by the turn roller 114.

  Then, the color band applying device 116 applies the color band 5 of a predetermined color at a predetermined interval according to the optical fiber ribbon 10. The color band applying device 116 is provided with a predetermined color band material supply device 120 such as an inkjet head or a dispenser. When an inkjet head is used, the color band 5 is formed by spraying the color band material intermittently at a predetermined timing on the common coating 2 around the traveling optical fiber core 1. In the case of using a dispenser, the color band 5 is formed by supplying the color band material from the dispenser to the common coating 2 around the traveling optical fiber core wire 1 at a predetermined timing.

As the material of the color band 5, a colored resin material, a colored ink, or the like can be used. When an ultraviolet curable resin material is supplied as a resin material by a dispenser, the color band applying device 116 is provided with an ultraviolet irradiation device after the dispenser.
Further, it is preferable to use a fluorescent material (for example, fluorescent ink) as the material of the color band 5. By applying the color band 5 using a fluorescent material, a desired optical fiber tape core can be easily obtained even when performing an intermediate post-branching operation of the optical fiber core in a dark place such as a manhole. The line 10 can be identified.

The optical fiber core wire 1 to which the color band is applied by the color band applying device 116 is controlled in tension by the winding tension control dancer 117 and intermittently cut by the intermittent processing device 118 to have an intermittent connection structure. It becomes the optical fiber ribbon 10 and is wound around the reel 121 by the winding device 119.
The intermittent machining device 118 includes a cutter blade that forms a cut at a predetermined timing at a predetermined position of the common coating 2. With this cutter blade, an optical fiber ribbon 10 in which the non-connecting portion 3 and the connecting portion 4 are intermittently provided on the adjacent optical fiber 1 as shown in FIG. 2B is obtained.

4A and 4B are diagrams showing a configuration example of an intermittent processing apparatus that intermittently forms a non-connecting portion on an optical fiber ribbon, and FIG. 4A is a view when the traveling optical fiber ribbon is viewed from above. FIG. 4B is a diagram showing a schematic configuration, and FIG. 4B is a diagram showing a schematic configuration when a traveling optical fiber ribbon is viewed from the side.
It is assumed that the optical fiber ribbon 10 is running from the right direction to the left in FIGS. 4A and 4B, and a plurality of the optical fiber ribbons 10 according to the number of the optical fiber strands are used. Incision mechanisms 6a-6c are provided. In this example, the case where the number of the optical fiber cores is four is shown for explanation, but the cutting mechanisms 6a to 6c can be added as the number of cores increases.

  In the case of a four-fiber optical fiber ribbon, three cutting mechanisms 6a to 6c are provided in order to form the unconnected portion 3 in each of the three adjacent optical fiber wires 1 as shown in the figure. It is done. The cutting mechanisms 6 a to 6 c form an intermittent unconnected portion 3 with respect to the optical fiber ribbon 10 by a cutting blade.

  The cutting mechanisms 6a to 6c are shifted in the production line direction (longitudinal direction of the optical fiber ribbon) between the guide rollers 7a and 7b that guide the traveling of the optical fiber ribbon 10 before and after the intermittent machining device, for example. The unconnected portion 3 is formed by the respective cutting mechanisms. By controlling the timing at which the non-connection portion 3 is formed by the cutting mechanisms 6a to 6c, the non-connection portion 3 and the connection portion 4 can be formed in a predetermined pattern.

  FIG. 5A and FIG. 5B are diagrams illustrating a cutting blade that forms a connecting portion of optical fiber ribbons. Each of the cutting mechanisms 6a to 6c shown in FIGS. 4A and 4B is provided with a cutting blade 8, and the cutting blade 8 is inserted into the traveling optical fiber ribbon 10 at a predetermined timing. Thereby, the non-connecting portion 3 is formed at a predetermined position of the optical fiber ribbon 10.

  As shown in the drawing, the traveling position of the traveling optical fiber ribbon 10 is determined by a positioning guide 9. Then, the cutting blade 8 is inserted into a predetermined position from the surface of the common coating 2, and the common coating 2 is cut open by pushing the optical fiber core wire 1 left and right. The cut-out common coating 2 is maintained in a state of being attached to the outer surface of the optical fiber core wire 1.

In order to form the non-connecting portion 3 with respect to the optical fiber core wire 1, the cutting blade 8 is rotated by a swing operation from the upper front side in the traveling direction of the optical fiber ribbon core 10 to the lower rear side in the traveling direction. Thus, the impact at the start of cutting can be alleviated and smooth cutting can be performed. Moreover, you may form the non-connecting part 3 by performing a stroke operation | movement up and down instead of a swing operation | movement. The cutting blade 8 used to form the non-connecting portion 3 is formed in a double-edged shape having blade surfaces on both sides, so that the optical fiber core wire 1 is evenly pushed left and right to open the non-connecting portion 3. Can be formed.
Each of the cutting mechanisms 6a to 6c forms a non-connecting portion 3 between different optical fiber cores 1. Thereby, the non-connecting portion 3 and the connecting portion 4 can be intermittently applied to the optical fiber ribbon 10 in a predetermined pattern.

FIG. 6 is a diagram showing a configuration example of an optical fiber unit according to the present invention. The optical fiber unit 20 is a bundle of a plurality of optical fiber ribbons 10 as shown in FIG. 2B, and a plurality of optical fiber units 20 can be used to create a multi-fiber optical fiber cable.
In this example, the optical fiber unit 20 is shown as a bundle of five optical fiber ribbons, but the number of optical fiber ribbons 10 is not limited. 3 shows a state in which the optical fiber ribbons 10 are arranged in parallel on a plane for the sake of explanation. In practice, however, the five optical fiber ribbons 10 are bundled together into a bundle material 21, It is set as the state bound by 22.

  Here, as shown in the figure, the five optical fiber ribbons 10 constituting the optical fiber unit 20 have different color bands 5 from each other. In this example, since the intervals of the color bands 5 that are closely arranged and visually recognized are different from each other, the operator can identify the desired optical fiber ribbon 10 from the optical fiber unit 20.

  The optical fiber unit 20 winds two bundle members 21 and 22 to bundle a plurality of optical fiber ribbons 10. The bundle materials 21 and 22 make it possible to identify the optical fiber ribbon 10 by changing the combination of the colors. For example, the bundle materials 21 and 22 can be provided in 50 combinations by using the bundle materials 21 and 22 of two colors selected from ten colors.

  The bundle members 21 and 22 are wound so as to bundle the optical fiber ribbons 10 while crossing each other. At the intersection, the two bundle members 21 and 22 are fixed by heating and fusing, so that when the optical fiber unit 20 is taken out from the optical cable, the bundle members 21 and 22 are unwound and the optical fiber ribbon 10 is separated. Can be avoided. For this reason, as a material used for the bundle materials 21 and 22, a resin material such as low melting point nylon or polyethylene can be used.

  For example, when manufacturing an optical fiber cable in which a plurality of optical fiber units 20 are bundled, the bundle material melts the bundle materials 21 and 22 inside thereof by heat from the molten resin at the time of coating molding of the optical fiber cable jacket. I will let you. Alternatively, after the plurality of optical fiber ribbons 10 are bundled with the bundle materials 21 and 22, the intersections may be heated using a hot jet or the like, and the intersections may be heated and fused.

  FIG. 7 is a cross-sectional view showing a configuration example of an optical fiber cable in which an optical fiber ribbon is mounted. The optical fiber cable 30 includes a plurality of optical fiber units 20 as shown in FIG. As a configuration example of the number of optical fiber cores in the optical fiber cable 30, for example, five optical fiber tape cores 10 are bundled to form an optical fiber unit 20, and for example, 45 optical fiber units 20 are integrated. It can be set as the optical fiber cable 30 provided with 1800 optical fiber core wires.

The optical fiber cable 30 twists together a plurality of the optical fiber units 20 as described above while reversing the twisting direction in one direction or by twisting them back, and gathers densely, and a presser winding layer 31 is provided on the outer periphery thereof. Further, by forming a jacket 32 made of polyethylene or the like on the outer periphery thereof, a multi-core optical fiber cable 30 in which optical fiber core wires are integrated at a high density is configured.
In the jacket 32, two strength members 33 and two jacket tearing strings 34 are embedded so as to be symmetrical with respect to the center of the optical fiber cable 30. Moreover, in order to provide the waterproof function required for the optical fiber cable 30, each optical fiber unit may be provided with an interposition such as a water absorbing yarn.

  Each of the plurality of optical fiber units 20 included in the optical fiber cable 30 is bundled by two bundle members 21 and 22. And the combination of coloration of the bundle material differs depending on the optical fiber unit 20. For example, when the bundle materials 21 and 22 are wound with a combination of 10 colors as described above, 50 combinations are possible, and even when the 1800 optical fiber cable 30 is created in the above example, In the 45 optical fiber units 20, all the combinations of colors can be made different. Thereby, the optical fiber unit 20 can be reliably identified from the colored combination of the bundle materials 21 and 22, and the optical fiber tape core wire 10 included in the optical fiber unit 20 is further separated by the interval or color of the color band 5. It becomes possible to distinguish from. If the optical fiber ribbon 10 can be specified, the desired optical fiber 1 can be identified and taken out by the colored layer of each optical fiber 1.

DESCRIPTION OF SYMBOLS 1 ... Optical fiber core wire, 2 ... Common coating | cover, 3 ... Non-connection part, 4 ... Connection part, 5 ... Color belt, 6a, 6b, 6c ... Cutting mechanism, 7a, 7b ... Guide roller, 8 ... Cutting blade, 9 ... Positioning guide, 10 ... Optical fiber ribbon, 20 ... Optical fiber unit, 21 and 22 ... Bundle material, 30 ... Optical fiber cable, 31 ... Presser wound layer, 32 ... Outer sheath, 33 ... Strength member, 34 ... Outer String to be torn, 100 ... Manufacturing device, 101 ... Supply, 102 ... Reel, 103 ... Dancer roller, 104 ... Conveying roller, 105 ... Concentration roller, 110 ... Coating device, 111 ... Resin storage tank, 112 ... Coating device, 113 ... UV irradiation device, 114 ... turn roller, 115 ... feed capstan, 116 ... color belt applying device, 117 ... winding tension control dancer, 118 ... intermittent processing device, 119 ... winding device 120 ... colored stripe material supply device, 121 ... reel.

Claims (3)

An optical fiber in which a plurality of optical fiber cores are arranged in a parallel row and a plurality of optical fiber tape cores in which adjacent optical fiber cores are intermittently connected in the longitudinal direction by a connecting part and a non-connecting part. A unit,
The optical fiber ribbon is provided with a color band intermittently in a longitudinal direction, and in the plurality of optical fiber tape cores, one or both of the color band interval and the color are different from each other. unit.   2. An optical fiber cable comprising a plurality of optical fiber units according to claim 1, wherein the optical fiber unit is formed by bundling the plurality of optical fiber ribbons with two bundle members, and the plurality of optical fibers. The unit is an optical fiber cable in which the combination of the colors of the two bundle materials is different from each other. An optical fiber in which a plurality of optical fiber cores are arranged in a parallel row and a plurality of optical fiber tape cores in which adjacent optical fiber cores are intermittently connected in the longitudinal direction by a connecting part and a non-connecting part. A unit manufacturing method comprising:
An optical fiber unit of the optical fiber unit, wherein a color band is intermittently provided in a longitudinal direction on the optical fiber ribbon, and one or both of the color band interval and the color are different from each other in the plurality of optical fiber ribbons. Production method.

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