JP4972177B2 - Multi-fiber ribbon and optical cable - Google Patents

Description

  The present invention relates to a multi-fiber ribbon and an optical cable, and more particularly to a multi-fiber ribbon and an optical cable including a large number of optical fibers.

  Conventionally, in an optical cable, in order to improve workability when connecting optical fibers as optical fibers housed in the cable, a plurality of optical fibers are arranged in parallel and restrained by an ultraviolet curable resin or the like. Many optical fiber ribbons are used. This optical fiber ribbon has the great advantage that a plurality of optical fibers can be fusion-bonded or connector-connected in a lump, so there are a plurality of optical fiber ribbons in the optical cable. Is stored.

  In recent years, optical fibers have spread to access systems, and there is an increasing demand for individually branching a plurality of optical fiber ribbons housed in an optical cable. Therefore, in order to easily identify each optical fiber tape core housed in the cable and improve the identification workability, a method for identifying the optical fiber tape core wire has been studied.

  Patent Document 1 discloses an optical fiber in which a plurality of optical fiber tape cores can be identified by arranging the colors of the collective coating layers in the optical fiber ribbons to be different from one another for each optical fiber ribbon. An assembly of tape cores is described. Patent Document 2 displays the composite optical fiber tape number for the composite optical fiber tape constituting the high-density cable, and displays the tape number of a large number of unit tapes so that the unit can be displayed for each branching unit. It describes how to devise ways.

JP 2003-255203 A Japanese Patent Application Laid-Open No. 8-220297

  By the way, the collective coating layer that constrains a plurality of optical fiber cores may be formed with a thickness of about 5 μm or less, for example, in order to facilitate separation of the optical fiber core wires from the optical fiber tape core wires. is there. Even if an attempt is made to identify each optical fiber ribbon by arranging different colors for each of a plurality of optical fiber ribbons housed in an optical cable in such a thin collective coating layer, the collective coating layer is thin and colored. In some cases, it is difficult to visually recognize the color, and it may be difficult to identify the optical fiber ribbon.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-fiber ribbon and an optical cable that further improve the identification workability of an optical fiber ribbon housed in an optical cable or the like.

The multi-core tape core wire according to the present invention is a multi-core tape core wire having a large number of optical fiber core wires, and has a plurality of unit assembly core wires in which a plurality of optical fiber core wires are arranged in parallel. A plurality of composite tape cores in which the plurality of unit assembly cores are constrained by a translucent restraining member that constrains the plurality of unit assembly cores by arranging unit assembly cores in parallel, and each unit assembly core An optical fiber core disposed at one end serving as a reference is colored with a different first color for each unit assembly core included in the same composite tape core, and the first optical fiber in each unit assembly core At least one optical fiber core wire other than the optical fiber core wire colored with one color is colored with a second color, and the second color is between each unit assembly core wire included in the same composite tape core wire. In the same color system, between the unit set cores included in different composite tape cores As a color, the remaining optical fibers included in each unit set core wire, the first color and the color other than the color used for the second color and JISZ8729 in the L ^* a ^* b ^* The saturation C ^{* of the} color system is colored with a color of 40 or less, or is not colored, and each composite tape core wire is identified by a color highlighted by the second color, and each composite tape Each unit set core included in the core is identified by the first color.

The multi-core tape core wire according to the present invention is a multi-core tape core wire having a large number of optical fiber core wires, and has a plurality of unit assembly core wires in which three or more optical fiber core wires are arranged in parallel, Each unit set includes a plurality of composite tape cores in which a plurality of unit assembly cores are arranged in parallel, and the plurality of unit assembly cores are constrained by a translucent restraining member that constrains the plurality of unit assembly cores. The optical fiber core wire arranged at one end serving as a reference in the core wire is colored with a first color different for each unit set core wire included in the same composite tape core wire. At least one optical fiber core wire other than the optical fiber core wire colored with the first color is colored with the second color, and the second color of each unit assembly core wire included in the same composite tape core wire The same color system is used between the unit assembly cores included in different composite tape cores. When the second color is the same color, the second color is colored to the optical fiber cores at different arrangement positions, and the remaining optical fiber cores included in each unit assembly core are the first color The color other than the color used for one color and the second color and L ^* a ^* b ^* color saturation C ^{* of} JISZ8729 is colored with 40 or less, or is not colored, Each composite tape core is identified by a color emphasized by the second color and an arrangement position of an optical fiber core colored by the second color, and each unit included in each composite tape core The aggregate core is identified by the first color.

The multi-core tape core wire according to the present invention is a multi-core tape core wire having a large number of optical fiber core wires, and has a plurality of unit assembly core wires in which three or more optical fiber core wires are arranged in parallel, A plurality of composite tape cores in which a plurality of unit assembly cores are constrained by a translucent restraining member that arranges a plurality of unit assembly cores in parallel and constrains the plurality of unit assembly cores. The optical fiber cores arranged at one end serving as a reference in the assembly core are colored with a first color different for each unit assembly core included in the same composite tape core, and each unit assembly core At least one optical fiber core wire other than the optical fiber core wire colored with the first color is colored with the second color, and the second color is the unit assembly core wire included in the same composite tape core wire. Are the same color system, and each unit aggregate included in two different composite tape cores When the second color is the same color, the optical fiber core wire colored with the first color and the optical fiber core wire colored with the second color are included in one unit assembly core wire A third color having a color C ^* of 40 or less in L ^* a ^* b ^* color system other than the colors used for the first color and the second color and in JISZ8729 The remaining optical fiber cores included in each unit assembly core are colors other than those used for the first color, the second color, and the third color, and L ^* a in JISZ8729 ^* B ^{* The} color saturation C ^{* of the} color system is colored with 40 or less, or is uncolored, and each of the composite tape core wires is colored with the second color and the third color Each single unit included in each composite tape core is identified by the presence or absence of a colored optical fiber core. Set core wire, characterized in that it is identified by the first color.

The multi-core tape core wire according to the present invention is a multi-core tape core wire having a large number of optical fiber core wires, and has a plurality of unit assembly core wires in which three or more optical fiber core wires are arranged in parallel, A plurality of composite tape cores in which a plurality of unit assembly cores are constrained by a translucent restraining member that arranges a plurality of unit assembly cores in parallel and constrains the plurality of unit assembly cores. The optical fiber cores arranged at one end serving as a reference in the assembly core are colored with a first color different for each unit assembly core included in the same composite tape core, and each unit assembly core At least one optical fiber core wire other than the optical fiber core wire colored with the first color is colored with the second color, and the second color is the unit assembly core wire included in the same composite tape core wire. Are the same color system, and each unit aggregate included in two different composite tape cores When the second color is the same color, the optical fiber core wire colored with the first color and the optical fiber core wire colored with the second color are included in one unit assembly core wire A third color having a color C ^* of 40 or less in L ^* a ^* b ^* color system other than the colors used for the first color and the second color and in JISZ8729 In the other unit assembly core, the optical fiber cores other than the optical fiber cores colored with the first color and the optical fiber cores colored with the second color, A color, a color other than those used for the second color and the third color, and a fourth color having a color saturation C ^* of 40 or less in L ^* a ^* b ^* color system in JISZ8729, The remaining optical fiber cores included in the unit assembly core wire are the first color, the second color, the third color, and Or serial fourth color other than the color used in the color and ^L in JISZ8729 ^{* a} * ^b * color system of chroma ^{C *} is colored with 40 or less colors, or a non-colored, the each composite The tape core is identified by the color emphasized by the second color, the third color, and the fourth color, and each unit assembly core included in each composite tape core is the first color. It is identified by.

The multi-core tape core wire according to the present invention is a multi-core tape core wire having a large number of optical fiber core wires, and has a plurality of unit assembly core wires in which three or more optical fiber core wires are arranged in parallel, Each unit set includes a plurality of composite tape cores in which a plurality of unit assembly cores are arranged in parallel, and the plurality of unit assembly cores are constrained by a translucent restraining member that constrains the plurality of unit assembly cores. An optical fiber core wire arranged at one end serving as a reference in the core wire is colored with a first color, and at least one light other than the optical fiber core wire colored with the first color in each unit assembly core wire The fiber core is colored with a second color, and the second color has the same color system between the unit assembly cores included in the same composite tape core, and each unit assembly included in different composite tape cores. The plurality of wires included in the same composite tape core wire are different in color from each other. When the first color of the core assembly core is the same color, the second color is colored to the optical fiber cores at different arrangement positions, and the remaining optical fibers included in each unit assembly core The core wire is a color other than the color used for the first color and the second color, and is colored with a color having a saturation C ^* of L ^* a ^* b ^* color system in JISZ8729 of 40 or less, Alternatively, each of the composite tape cores is uncolored and is identified by a color emphasized by the second color, and each unit assembly core included in each of the composite tape cores is colored by the second color. The optical fiber core wire is identified by the arrangement position and the first color.

The multi-core tape core wire according to the present invention is a multi-core tape core wire having a large number of optical fiber core wires, and has a plurality of unit assembly core wires in which three or more optical fiber core wires are arranged in parallel, A plurality of composite tape cores in which a plurality of unit assembly cores are constrained by a translucent restraining member that arranges a plurality of unit assembly cores in parallel and constrains the plurality of unit assembly cores. The optical fiber core wire arranged at one end serving as a reference in the assembly core wire is colored with a first color and at least one other than the optical fiber core wire colored with the first color in each unit assembly core wire The optical fiber core is colored with a second color, and the second color is the same color system between the unit assembly cores included in the same composite tape core, and each unit set included in a different composite tape core The two cores must have different colors, and the two When the first color of the core assembly core is the same color, the optical fiber core included in one unit assembly core and colored with the first color and the optical fiber colored with the second color The optical fiber cores other than the cores are colored with a third color other than the colors used for the first color and the second color, and the remaining optical fiber cores included in each unit assembly core are Are colors other than the colors used for the first color, the second color, and the third color, and the color C ^* of the L ^* a ^* b ^* color system in JISZ8729 is 40 or less, or Alternatively, each of the composite tape cores is uncolored and is identified by a color emphasized by the second color, and each unit assembly core included in each of the composite tape cores is colored by the third color. The optical fiber core wire is identified by the presence or absence and the first color.

In the multi-fiber ribbon according to the present invention, the first color and the second color are preferably colors having a saturation C ^* of L ^* a ^* b ^* color system in JISZ8729 of greater than 40.

In the multi-fiber ribbon according to the present invention, the second color is colored on the optical fiber core at the other end included in each unit assembly core, and the optical fiber core included in each unit assembly core. When the first color and the second color are made the same color system, the color difference ΔEcmc of the L ^* a ^* b ^* color system in JISZ8729 is set to 30 or less from the first color. It is preferable.

  In the multicore tape core according to the present invention, the unit assembly core is preferably a unit tape core.

  The optical cable which concerns on this invention is equipped with the cable core which has said multi-core tape core wire, and the outer sheath provided in the outer periphery of the said cable core, and formed with a synthetic resin, It is characterized by the above-mentioned.

  According to the multi-core tape core and the optical cable having the above-described configuration, the composite tape core and the unit assembly core can be identified based on the colored optical fiber core, so that the identification workability can be further improved.

In embodiment of this invention, it is sectional drawing which shows the structure of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows the color arrangement pattern colored by the optical fiber core wire which comprises a multi-core tape core wire. In embodiment of this invention, it is a figure which shows the color arrangement pattern in case the 2nd color is colored to the optical fiber core wire arrange | positioned in the different position in each unit tape core wire. In embodiment of this invention, it is a figure which shows the color arrangement pattern in case the 2nd color is colored to the some optical fiber core wire in each unit tape core wire. In the embodiment of the present invention, the second optical fiber core from the one end serving as the reference in each unit tape core is colored blue, and the third optical fiber core from the one end serving as the reference is colored red. It is a figure which shows the color arrangement pattern of the multi-core tape core wire test piece color-coded. In the embodiment of the present invention, the second optical fiber core wire from one end serving as a reference in each unit tape core wire is colored blue, and the saturation C ^{* is applied} to the third optical fiber core wire from one end serving as a reference ^. It is a figure which shows the color arrangement pattern of the multi-core tape core wire test piece colored by coloring gray which is 40 or less. In the embodiment of the present invention, the second optical fiber core from the one end serving as a reference in each unit tape core is colored white having a saturation C ^* of 40 or less, and the third from the one end serving as the reference. It is a figure which shows the color arrangement pattern of the multi-core tape core wire test body color-coded with the optical fiber core wire being uncolored. In the embodiment of the present invention, the second optical fiber core wire from one end serving as a reference in each unit tape core wire is colored gray having a saturation C ^* of 40 or less, and the third optical fiber core wire from the one end serving as a reference It is a figure which shows the color arrangement pattern of the multi-core tape core wire test body color-coded with the optical fiber core wire being uncolored. In the embodiment of the present invention, the second optical fiber core wire from one end serving as a reference in each unit tape core wire is colored pink with a saturation C ^* of 40 or less, and the third optical fiber core wire from the one end serving as the reference It is a figure which shows the color arrangement pattern of the multi-core tape core wire test piece which colored the light blue which has saturation C ^* of 40 or less to the optical fiber core wire. In embodiment of this invention, it is a figure which shows the color arrangement pattern of the multi-core tape core wire which performed the ring mark printing to all the optical fiber core wires colored with the 2nd color. In embodiment of this invention, it is a figure which shows the color arrangement pattern of the multi-core tape core wire which performed the ring mark printing on a part of optical fiber core wire colored with the 2nd color. In embodiment of this invention, it is sectional drawing which shows the structure of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows the color arrangement pattern colored by the optical fiber core wire which comprises a multi-core tape core wire. In embodiment of this invention, it is a figure which shows the other color arrangement pattern of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows another color arrangement pattern of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows another color scheme of a multi-core tape core wire. In embodiment of this invention, it is sectional drawing which shows the structure of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows the color arrangement pattern colored by the optical fiber core wire which comprises a multi-core tape core wire. In embodiment of this invention, it is a figure which shows the other color arrangement pattern of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows the further another color scheme of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows another color arrangement pattern of a multi-core tape core wire. In embodiment of this invention, it is a figure which shows another color arrangement pattern of a multi-core tape core wire. In embodiment of this invention, it is sectional drawing which shows the structure of the other composite tape core wire. In embodiment of this invention, it is sectional drawing which shows the structure of another composite tape core wire. In embodiment of this invention, it is sectional drawing which shows the structure of another composite tape core wire. In embodiment of this invention, it is sectional drawing which shows the structure of an optical cable. In embodiment of this invention, it is sectional drawing which shows the structure of the other optical cable.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing the configuration of the multi-core tape core wire 10.

  The multi-core tape core wire 10 is composed of five composite tape core wires 11 to 15. Each of the composite tape cores 11 to 15 has a function as a translucent restraining member that constrains five unit tape cores by arranging five unit tape cores as four unit cores in parallel. It has the structure restrained with the coating | covering material 22 which has this. For example, in the composite tape core 11, five unit tape cores 11 </ b> A to 11 </ b> E are constrained by the covering material 22.

  The unit tape cores 11A to 11E, 12A to 12E, 13A to 13E, 14A to 14E, and 15A to 15E are arranged in such a manner that four optical fiber cores a to d are arranged in parallel, and the four optical fiber cores are constrained. It has the structure restrained with the coating | covering material 24 which has a function as a translucent restraint member to perform. In addition, it is preferable that the coating | covering materials 22 and 24 are non-colored so that the color colored to the optical fiber core wire can be identified more correctly so that it may mention later.

  The optical fiber cores a to d include, for example, an optical fiber bare wire 30 formed of quartz glass, a first resin layer 32 coated on the outer periphery of the optical fiber bare wire 30 with a soft and hard ultraviolet curable resin, And a second resin layer 34 which is provided on the outer periphery of the first resin layer 32 and is formed of an ultraviolet curable resin or the like to which a color pigment is added. In general, the pigment used in the optical fiber core wire can be used as the color pigment. In addition, when it is not necessary to color an optical fiber core wire, the 2nd resin layer 34 is not formed, or the 2nd resin layer 34 is formed with the ultraviolet curable resin etc. to which the coloring pigment is not added.

  As described above, the multi-core tape core wire 10 includes 100 optical fiber core wires. The number of optical fiber cores constituting the unit tape core included in the multi-fiber ribbon 10 is not limited to four, and may be two or more, such as eight or twelve.

  Next, the color colored on the optical fiber core wire constituting the multi-core tape core wire 10 will be described. FIG. 2 is a diagram showing a color arrangement pattern colored on the optical fiber cores constituting the multi-fiber ribbon 10.

  An optical fiber core wire (tracer optical fiber core wire) a arranged at one end serving as a reference in each unit tape core wire 11A to 15E is used to identify each unit tape core wire included in the same composite tape core wire. Each unit tape core included in the same composite tape core is colored with a different first color (that is, the first color means the color of the tracer optical fiber core).

As the first color, it is preferable to use a color having a saturation C ^* of more than 40 in L ^* a ^* b ^* color system such as blue, yellow, green, red, purple, etc. . Of course, the first color is not limited to these colors, and may be white, brown, gray, pink, black, light blue, or the like.

  In the case of the first composite tape core 11, the optical fiber core a disposed at the left end of the unit tape core 11A is colored blue, and the optical fiber core a disposed at the left end of the unit tape core 11B. Is colored yellow, the optical fiber core a disposed at the left end of the unit tape core 11C is colored green, the optical fiber core a disposed at the left end of the unit tape core 11D is colored red, The optical fiber core a disposed at the left end of the unit tape core E is colored purple. Similarly to the composite tape core wire 11, the composite tape core wires 12 to 15 also have the first color on the optical fiber core wire (tracer optical fiber core wire) a disposed at one end serving as a reference in each unit tape core wire. Is colored. As described above, the optical fiber core (tracer optical fiber core) a disposed at one end serving as a reference is colored with a different first color for each unit tape core, thereby being included in the same composite tape core. Each unit tape core wire can be identified based on the first color. Further, the remaining optical fiber cores b, c, and d included in each unit tape core wire can be identified with reference to the optical fiber core wire (tracer optical fiber core wire) a colored in the first color. .

  At least one of the optical fiber cores b, c and d (sub-tracer optical fiber core) other than the optical fiber core (tracer optical fiber core) a colored with the first color in each unit tape core wire is In order to identify each composite tape core, it is colored with the second color (that is, the second color means the color of the sub-tracer optical fiber core. It is preferably a fiber core d). The second color is the same color between the unit tape cores included in the same composite tape core, and the second color is different between the unit tape cores included in different composite tape cores. The tracer optical fiber is colored.

For the second color, it is preferable to use a color of which the saturation C ^* of the L ^* a ^* b ^* color system in JISZ8729 is greater than 40, such as blue, yellow, green, red, purple, etc. . Of course, the second color is not limited to these colors, and may be white, brown, gray, pink, black, light blue, or the like.

The same color system means that one color and the other color are the same color, and the other color is a color whose color difference ΔEcmc of the L ^* a ^* b ^* color system in JISZ8729 is 30 or less. Means the case. Therefore, when the color difference ΔEcmc of the L ^* a ^* b ^* color system in JISZ8729 is 30 or less, the other color is excluded from the different color.

When the first color and the second color colored on the optical fiber core wire in each unit tape core wire are the same color system, the second color is set to L ^* a ^* b ^{* in} JISZ8729 with respect to the first color ^. The color difference ΔEcmc of the color system is preferably 30 or less. With such a configuration, it is possible to identify the optical fiber core wire at one end serving as a reference based on the color difference between the first color and the second color. Of course, depending on other conditions, the first color and the second color colored on the optical fiber cores included in each unit tape core may be the same color.

The color of the sub-tracer optical fiber in each unit tape core is the same as the color of the tracer optical fiber in the unit tape to which the sub-tracer optical fiber belongs, It is preferable that they have the same color. If the color of the sub-tracer optical fiber is the same as the color of the tracer optical fiber included in the unit tape core to which the sub-tracer optical fiber belongs, the color of the sub-tracer optical fiber The color difference ΔEcmc of the L ^* a ^* b ^* color system in JISZ8729 is preferably 30 or less with respect to the color of the tracer optical fiber.

  In the composite tape core wire 11, the optical fiber core wire d disposed at the right end of the unit tape core wire 11A is colored light blue, and the optical fiber core wire d disposed at the right end of the unit tape core wires 11B to 11E is blue. Is colored.

  In the composite tape core wire 12, the optical fiber core wire d disposed at the right end of the unit tape core wires 12A, 12C to 12E is colored yellow, and the optical fiber core wire d disposed at the right end of the unit tape core wire 12B is It is colored pale yellow.

  In the composite tape core wire 13, the optical fiber core wire d disposed at the right end of the unit tape core wires 13A, 13B, 13D, and 13E is colored green, and the optical fiber core wire disposed at the right end of the unit tape core wire 13C. d is colored light green.

  In the composite tape core wire 14, the optical fiber core wire d disposed at the right end of the unit tape core wires 14A to 14C and 14E is colored red, and the optical fiber core wire d disposed at the right end of the unit tape core wire 14D is It is colored light red.

  In the composite tape core 15, the optical fiber core d disposed at the right end of the unit tape cores 15A to 15D is colored purple, and the optical fiber core d disposed at the right end of the unit tape core 15E is light purple. Is colored.

  The first color colored on the optical fiber core of each unit tape core included in the same composite tape core is a different color between the unit tape cores, whereas the second color is the same color system. Therefore, the second color is emphasized in the composite tape core wire. In the composite tape core 11, blue is emphasized, in the composite tape core 12, yellow is emphasized, in the composite tape core 13, green is emphasized, in the composite tape core 14, red is emphasized, and in the composite tape core 15. Purple is emphasized. Therefore, the composite tape cores 11 to 15 are easily identified based on the color emphasized by the second color.

Further, in each of the composite tape cores 11 to 15, when the first color and the second color are made the same color system in the unit tape core wire, the L ^* a ^* b ^* table in JISZ8729 for the first color. Light blue, light yellow, light green, light red, and light purple with a color difference ΔEcmc of 30 or less are used as the second color, so that one end of the color difference between the first color and the second color is used as a reference. An optical fiber core wire can be identified.

  The second color is not only the optical fiber core d arranged at the right end in each unit tape core, but also other positions than the optical fiber core a colored in the first color in each unit tape core. The optical fiber cores b and c arranged in the above may be colored. FIG. 3 is a diagram showing a color arrangement pattern when the second color is colored on the optical fiber cores arranged at different positions in each unit tape core. In the color arrangement pattern of the multi-fiber ribbon 10 shown in FIG. 3, the second color is colored to the optical fiber core c disposed at the third position from the optical fiber core at one end as a reference. In addition, it is identified that the second color is colored to the optical fiber core d disposed at the other end opposite to the optical fiber core a disposed at one end serving as a reference in each unit tape core. From the viewpoint of sex.

  Further, the second color may be colored in a plurality of optical fiber cores other than the optical fiber core a in which the first color in each unit tape core is colored. FIG. 4 is a diagram showing a color arrangement pattern when the second color is colored on a plurality of optical fiber cores c and d in each unit tape core. In the color arrangement pattern of the multi-fiber ribbon 10 shown in FIG. 4, the second color includes the optical fiber core c at the third position from the optical fiber core a at one end as a reference, and the optical fiber core d at the right end. Is colored. Thus, by increasing the optical fiber core colored in the second color in each unit tape core, the second color is more emphasized in each composite tape core 11 to 15, and each composite tape core 11 Identification of ~ 15 becomes easier.

2 again, in each of the unit tape cores 11A to 15E, the remaining optical fiber cores other than the optical fiber core a colored with the first color and the optical fiber core d colored with the second color. b and c are colors other than those used for the first color and the second color, and are colored with a color in which the saturation C ^* of the L ^* a ^* b ^* color system in JISZ8729 is 40 or less, or non-colored Coloring is preferred.

Examples of colors having a color saturation C ^* of 40 or less in L ^* a ^* b ^* color system in JISZ8729 include white, gray, pink, light blue, brown, and black. The remaining optical fiber cores b and c in each unit tape core are colors other than the colors used for the first color and the second color, and the L ^* a ^* b ^* color system saturation C ^* in JISZ8729 is By coloring or non-coloring with 40 or less colors, the first color and the second color can be visually recognized more clearly. The remaining optical fiber cores b and c in each unit tape core may be colored with the same color, or may be colored with different colors. Further, a colored optical fiber core and a non-colored optical fiber core may be combined.

  Here, the optical fiber cores b and c other than the optical fiber core a colored with the first color of the unit tape core and the optical fiber core d colored with the second color are colored with various colors, The discriminability of the composite tape core was evaluated. For the discrimination test, multi-core ribbon test specimens having five color patterns were used. In the five types of multi-fiber ribbon test specimens, the coloration of the optical fiber cores a and d in each unit tape core is the same as that of the multi-fiber ribbon 10 having the color arrangement pattern shown in FIG. For coloring the optical fiber core, a coating material such as Desolite manufactured by DSM or JSR was used.

  FIG. 5 shows a color arrangement in which the second optical fiber core b from one end serving as a reference in each unit tape core is colored blue, and the third optical fiber core c from one end serving as a reference is colored red. It is a figure which shows the color arrangement pattern of the multi-core tape core wire specimen.

  FIG. 6 shows a color arrangement in which the second optical fiber core b from the reference one end in each unit tape core is colored blue, and the third optical fiber core c from the reference one is colored gray. It is a figure which shows the color arrangement pattern of the multi-core tape core wire specimen.

  FIG. 7 shows a multicolor in which the second optical fiber core b from one end serving as a reference in each unit tape core is colored white, and the third optical fiber core c from one end serving as a reference is uncolored. It is a figure which shows the color scheme pattern of the core tape core wire test piece.

  FIG. 8 shows a multi-color arrangement in which the second optical fiber core b from one end serving as a reference in each unit tape core is colored gray and the third optical fiber core c from one end serving as a reference is uncolored. It is a figure which shows the color scheme pattern of the core tape core wire test piece.

  FIG. 9 shows a color arrangement in which the second optical fiber core b from one end serving as a reference in each unit tape core is colored pink, and the third optical fiber core c from one end serving as a reference is colored light blue. It is a figure which shows the color arrangement pattern of the multi-core tape core wire specimen.

  In the discrimination test, the multi-core tape core samples having the above-mentioned color arrangement patterns shown in FIGS. 5 to 9 are arranged on white paper, and the multi-core tape is measured from a distance of about 40 cm from the multi-core tape sample. The tape core wire was visually observed by 10 persons, and each composite tape core wire constituting the multi-core tape core wire specimen was evaluated by whether it could be visually identified. As a result, in the multi-core tape core specimens having the color arrangement patterns shown in FIGS. 7, 8, and 9, all the members could identify each composite tape core.

  In addition, in order to further improve the distinguishability, ring mark printing is performed on the optical fiber core wire a colored with the first color of each unit tape core wire 11A to 15E or the optical fiber core wire d colored with the second color. You may go. FIG. 10 is a diagram showing a color arrangement pattern of the multi-core tape core wire in which ring mark printing is performed on all the optical fiber core wires d colored with the second color. FIG. 11 is a diagram showing a color arrangement pattern of a multi-fiber ribbon having a ring mark printed on a part of the optical fiber d colored with the second color.

  10 and 11, the unit tape core 11 of the composite tape core 11, the unit tape core 12 B of the composite tape core 12, and the unit tape core of the composite tape 13 are used. In the line 13C, the unit tape core 14D of the composite tape core 14 and the unit tape core 15E of the composite tape core 15, the second color is the same as the first color, and the other colors are the same as the color arrangement pattern shown in FIG. This is the same as the color arrangement pattern of the multi-fiber ribbon 10.

  As shown in FIGS. 10 and 11, the first color and the second color colored in the optical fiber core wire in the unit tape core wire are printed by ring mark printing on the optical fiber core wire d colored in the second color. Even in the case of the unit tape cores 11A, 12B, 13C, 14D, and 15E having the same color, the optical fiber core a at one end as a reference can be easily identified. For the ring mark printing, printing methods generally used for optical fiber core wires can be used.

  In the above configuration, the second color, which is a color selected from the color group consisting of the colors used for the first color, is used. Of course, a color that is not used for the first color is used as the second color. It may be used. For example, in the multi-core tape core wire 10 having the color arrangement pattern shown in FIG. 2, white may be used in place of the light blue and blue used for the composite tape core 11, and the light yellow and Brown may be used instead of yellow, gray may be used instead of light green and green used for the composite tape core wire 13, and pink instead of light red and red used for the composite tape core wire 14 may be used. It may be used, and orange may be used instead of the light purple and purple used for the composite tape core wire 15. In order to reduce the number of colors used for identification, it is preferable to share the color used for the first color and the color used for the second color.

  Thus, according to the multi-core tape core wire 10 of the color arrangement pattern shown in FIGS. 2 to 4, first, the composite tape core wires 11 to 15 are identified based on the color emphasized by the second color, and then The identification workability is improved by identifying each unit tape core included in the composite tape cores 11 to 15 based on the first color. Further, according to the multi-core tape core wire 10 having the color arrangement pattern shown in FIGS. 2 to 4, the composite tape core wires 11 to 15 and the composite tape can be used without confirming the arrangement position of the colored optical fiber core wires. Since each unit tape core included in the cores 11 to 15 can be identified, the identification work is facilitated.

Also, the setting of the second color, which is the color of the sub-tracer optical fiber, can be summarized as follows. That is, the color of the sub-tracer optical fiber that is different for each composite tape core and distinguishes the composite tape core from other composite tape cores is the color C _j ^{k = n} determined as follows. Set to have.

  However, j represents the position number of each unit tape core in the composite tape core, and j = 1, 2,..., Where J is the total number of unit tape cores included in each composite tape. J, k represents the position number of each optical fiber core in each unit tape core, and k = 1, 2, where K is the total number of optical fiber cores in each unit tape core. ... K, and n represents the position of the sub-tracer optical fiber in each unit tape core, where n = 2, 3, ... K). For example, in the multi-core tape core 10 having the color arrangement pattern shown in FIG. 2, the total number J of unit tape cores included in each composite tape core is J = 5, the unit tape core A is j = 1, and the unit tape core. Line B corresponds to j = 2, unit tape core C corresponds to j = 3, unit tape core D corresponds to j = 4, and unit tape core E corresponds to j = 5. The total number K of optical fiber cores in each unit tape core wire is K = 4, the optical fiber core wire a is k = 1, the optical fiber core wire b is k = 2, and the optical fiber core wire c is k = 3. The optical fiber core wire d corresponds to k = 4.

[Method for Determining Color C _j ^{k = n} of Subtracer Optical Fiber Core]
(1) A tracer in the same j-th unit tape core wire in which the color C ₀ selected from the color group consisting of a plurality of colors having a color saturation C ^* of greater than 40 in L ^* a ^* b ^* color system in JISZ8729 When the color C _j ^{k = 1} is different from the color C _j ^{k = 1 of the} optical fiber, the color C _j ^{k = n} of the sub-tracer optical fiber is set as the color C ₀ .

(2) A tracer in the same j-th unit tape core wire in which the color C ₀ selected from the color group consisting of a plurality of colors having a color saturation C ^* of greater than 40 in L ^* a ^* b ^* color system in JISZ8729 If it is the same color as the color _C ^{j k = 1} of the optical fiber, the color difference ΔEcmc the ^L * ^a * ^{b *} color system with respect to the color _C ^{j k = 1} tracer optical fiber in JISZ8729 The color is 30 or less.

Each unit tape core wire is a color (including an achromatic color ^{) in} which the saturation C ^* of the L ^* a ^* b ^* color system in JISZ8729 is 40 or less between the tracer optical fiber core wire and the sub-tracer optical fiber core wire. It is preferable to have an optical fiber core that is colored with a transparent color. Each unit tape core wire preferably has the same number of optical fiber core wires.

Each unit tape core includes four or more optical fiber cores, and the sub-tracer optical fiber is connected to the other end of each unit tape core opposite to one end where the tracer optical fiber is located. The remaining optical fiber cores that are positioned and included in each unit tape core wire are from a color (including achromatic color) or a transparent color with a saturation C ^* of the L ^* a ^* b ^* color system of 40 or less in JISZ8729 It is preferred to have the color selected.

As described above, according to the multi-core tape core having the above configuration, there are 25 unit tape cores in which four optical fiber cores are arranged in parallel, and five unit tape cores are arranged in parallel. 5 composite tape cores that constrain five unit tape cores with a translucent covering material that constrains the unit tape cores, and arranged at one end serving as a reference in each unit tape core The optical fiber core is colored with a different first color for each unit tape core contained in the same composite tape core, and other than the optical fiber core colored with the first color in each unit tape core. At least one of the optical fiber cores is colored with a second color, and the second color is the same color system between the unit tape cores included in the same composite tape core, and is included in different composite tape cores. Each unit tape core is different in color and is included in each unit tape core. The remaining coated optical fiber is the saturation of the first color and ^L * ^a * ^{b *} color system of the color a and JISZ8729 other than the color used for the second color ^{C *} is colored with 40 following colors Since each composite tape core wire is identified by a color emphasized by the second color, each unit tape core wire included in each composite tape core wire is identified by the first color. .

  Next, another multi-fiber ribbon will be described. FIG. 12 is a cross-sectional view showing a configuration of another multi-core tape core wire 40. In addition, the same code | symbol is attached | subjected to the same element and detailed description is abbreviate | omitted. The multi-core tape core 40 includes ten composite tape cores 41 to 50. Each of the composite tape cores 41 to 50 is a covering material 22 having a function as a translucent restraining member for arranging five unit tape cores in parallel and restraining the five unit tape cores. It has a constrained configuration. For example, in the composite tape core 41, five unit tape cores 41 </ b> A to 41 </ b> E are restrained by the covering material 22.

  As described above, the multi-fiber ribbon 40 includes 200 optical fibers. Note that the number of optical fiber cores constituting the unit tape core included in the multi-fiber ribbon 40 is not limited to four, and may be, for example, three or more, such as eight or twelve.

  Next, the color colored on the optical fiber core wire constituting the multi-core tape core wire 40 will be described. FIG. 13 is a diagram showing a color arrangement pattern colored on the optical fiber cores constituting the multi-fiber ribbon 40.

  The composite tape core wire 41 to the composite tape core wire 45 are arranged in the same color pattern as the multi-core tape core wire 10 of the color arrangement pattern shown in FIG. The optical fiber core wire (tracer optical fiber core wire) a disposed at one end serving as a reference for each unit tape core wire of the composite tape core wires 46 to 50 is blue with the same color pattern as the composite tape core wires 41 to 45. The first color is colored in the order of yellow, green, red, and purple.

  Then, as the second color to be colored on the sub-tracer optical fiber cores of the composite tape cores 46 to 50, the composite tape core wire 46 has an optical fiber core wire d arranged at the right end of the unit tape core wires 46A to 46E. In the composite tape core wire 47, the optical fiber core wire d arranged at the right end of the unit tape core wires 47A to 47E is colored brown, and in the composite tape core wire 48, the right end of the unit tape core wires 48A to 48E is colored. In the composite tape core wire 49, the optical fiber core wire d disposed at the right end of the unit tape core wires 49A to 49E is colored pink, and the composite tape core wire 50 is colored pink. Then, the optical fiber core wire d arranged at the right end of the unit tape core wires 50A to 50E is colored orange.

  Therefore, blue is emphasized in the composite tape core 41, yellow is emphasized in the composite tape core 42, green is emphasized in the composite tape core 43, red is emphasized in the composite tape core 44, and the composite tape core wire is emphasized. 45 emphasizes purple, composite tape core 46 highlights white, composite tape core 47 highlights brown, composite tape core 48 highlights gray, and composite tape core 49 highlights pink. In the composite tape core wire 50, the orange color is emphasized.

  By configuring the multi-core ribbon 40 with the color arrangement pattern shown in FIG. 13, the composite tape cores 41 to 50 are identified based on the color emphasized by the second color, and each of the composite tape cores 41 to 50 is identified. The identification workability is improved by identifying the unit tape core wire included based on the first color. Further, according to the multi-core tape core 40 having the color arrangement pattern shown in FIG. 13, the composite tape cores 41 to 50 and the composite tape core 41 can be obtained without confirming the arrangement position of the colored optical fiber core. Since each unit tape core included in ˜50 can be identified, the identification work is facilitated.

As described above, according to the multi-core tape core having the above-described configuration, there are 50 unit tape cores in which four optical fiber cores are arranged in parallel, and five unit tape cores are arranged in parallel. 10 composite tape core wires, each of which is a light-transmitting covering material for restraining the unit tape core wires and restraining the five unit tape core wires, are arranged at one end serving as a reference in each unit tape core wire. The optical fiber core is colored with a different first color for each unit tape core contained in the same composite tape core, and other than the optical fiber core colored with the first color in each unit tape core. At least one of the optical fiber cores is colored with a second color, and the second color is the same color system between the unit tape cores included in the same composite tape core, and is included in different composite tape cores. Each unit tape core is different in color and included in each unit tape core That the remaining coated optical fiber is the saturation of the first color and ^L * ^a * ^{b *} color system of the color a and JISZ8729 other than the color used for the second color ^{C *} is colored with 40 following colors Each composite tape core is identified with a color highlighted in the second color, and each unit tape core included in each composite tape core is identified with the first color. The

  FIG. 14 is a diagram showing another color arrangement pattern of the multi-fiber ribbon 40. As shown in FIG. The composite tape cores 41 to 45 are colored in the same color scheme as the multi-core tape core wires 10 of the color scheme shown in FIG. The composite tape cores 46 to 50 are colored in the same color arrangement pattern as the multi-core tape core wires 10 of the color arrangement pattern shown in FIG. In the composite tape cores 46 to 50, the arrangement positions of the sub-tracer optical fiber cores colored in the second color included in the unit tape cores are different from the composite tape cores 41 to 45. In the composite tape core wires 41 to 45, the optical fiber core wire d is colored with the second color, and in the composite tape core wires 46 to 50, the optical fiber core wire c is colored in the second color.

  According to the multi-core tape core 40 having the color arrangement pattern shown in FIG. 14, first, the composite tape cores 41 and 46 in which blue is emphasized, the composite tape cores 42 and 47 in which yellow is emphasized, and green are emphasized. The composite tape core wires 43 and 48, the composite tape core wires 44 and 49 highlighted in red, and the composite tape core wires 45 and 50 highlighted in purple are identified. Thereafter, each of the two composite tape cores is identified by the positions of the optical fiber cores c and d colored in the second color in each unit tape core. For example, when discriminating the composite tape core wire 41 and the composite tape core wire 46 in which blue is emphasized, the optical fibers colored in the blue of the unit tape core wires 41A to 41E included in the composite tape core wire 41. What is necessary is just to identify with the core wire d and the optical fiber core wire c colored blue of each unit tape core wire 46A-46E contained in the composite tape core wire 46. FIG.

  In this way, by configuring the multi-core tape core 40 with the color arrangement pattern shown in FIG. 14, the composite tape cores 41 to 50 have a color emphasized by the second color and light colored by the second color. Since the unit tape cores are identified based on the first color and are identified based on the arrangement positions of the fiber cores and included in the composite tape cores 41 to 50, the identification workability is improved. Further, according to the multi-fiber ribbon 40 having the color arrangement pattern shown in FIG. 14, the composite tape cores 41 to 50 are highlighted with the second color, and the sub-tracer optical fiber core with the second color is colored. Thus, the number of colors used for coloring the optical fiber cores can be reduced as compared with the multi-fiber ribbon 40 having the color arrangement pattern shown in FIG.

As described above, according to the multi-core tape core having the above-described configuration, there are 50 unit tape cores in which four optical fiber cores are arranged in parallel, and five unit tape cores are arranged in parallel. 10 composite tape core wires, each of which is a light-transmitting covering material for restraining the unit tape core wires and restraining the five unit tape core wires, are arranged at one end serving as a reference in each unit tape core wire. The optical fiber core is colored with a different first color for each unit tape core contained in the same composite tape core, and other than the optical fiber core colored with the first color in each unit tape core. The at least one optical fiber core is colored with a second color, and the second color is the same color system among the unit tape cores included in the same composite tape core, and is included in different composite tape cores. When the second color between the unit tape cores is the same color, the second color Colored coated optical fiber of different positions, remaining optical fibers included in each unit ribbons, a color other than the color used for the first and second colors and L in JISZ8729 ^* a ^* B ^* Saturation C ^{* of the} color system is colored with a color of 40 or less, or is not colored, so that each composite tape core line has a color emphasized by the second color and a second color Each unit tape core wire included in each composite tape core wire is identified by the first color.

FIG. 15 is a diagram showing another color arrangement pattern of the multi-fiber ribbon 40. The composite tape cores 41 to 45 are colored with the same color scheme as the multi-core tape core wires 10 of the color scheme shown in FIG. For the composite tape cores 46 to 50, in addition to the color arrangement pattern of the composite tape core wires 41 to 45, the optical fiber core wires (tracer optical fibers) colored in the first color included in the unit tape core wires 46A to 50E. A third core for identifying two composite tape cores of the same color system on the optical fiber cores c other than the optical fiber cores (sub-tracer optical fiber cores) d colored the cores a) and the second color; The color is colored. As the third color, a color other than the colors used for the first color and the second color and a color saturation C ^* of the L ^* a ^* b ^* color system in JISZ8729 of 40 or less is used. In the multi-fiber ribbon 40 of the color arrangement pattern in FIG. 15, gray is used as the third color.

  According to the color arrangement pattern of the multicore tape core 40 shown in FIG. 15, first, the composite tape cores 41 and 46 in which blue is emphasized, the composite tape cores 42 and 47 in which yellow is emphasized, and the green are emphasized. After identifying the composite tape cores 43 and 48, the composite tape cores 44 and 49 in which red is emphasized, and the composite tape cores 45 and 50 in which purple is emphasized, the third color in each unit tape core is colored. For example, since the composite tape core wire 41 and the composite tape core wire 46 may be identified based on the presence or absence of the optical fiber core wire, the composite tape core wires 41 to 50 can be easily identified.

  In this way, by configuring the multi-core tape core 40 with the color arrangement pattern shown in FIG. 15, the composite tape cores 41 to 50 are based on the presence / absence of the third color and the color emphasized by the second color. Since each unit tape core wire that is identified and included in each composite tape core wire 41 to 50 is identified based on the first color, the identification workability of the optical fiber core wire is improved. Further, according to the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. 15, by identifying the composite tape core wires 41 to 50 based on the presence / absence of the third color and the color emphasized by the second color, The number of colors used for coloring the optical fiber core wire can be reduced as compared with the multi-core tape core wire 40 having the color arrangement pattern shown in FIG.

As described above, according to the multi-core tape core having the above-described configuration, there are 50 unit tape cores in which four optical fiber cores are arranged in parallel, and five unit tape cores are arranged in parallel. 10 composite tape core wires, each of which is a light-transmitting covering material for restraining the unit tape core wires and restraining the five unit tape core wires, are arranged at one end serving as a reference in each unit tape core wire. The optical fiber core is colored with a different first color for each unit tape core contained in the same composite tape core, and other than the optical fiber core colored with the first color in each unit tape core. At least one optical fiber core is colored with a second color, and the second color is the same color system between the unit tape cores included in the same composite tape core, and two different composite tape cores If the second color between the unit tape cores contained in the same color is the same, one unit Used in the first color and the second color for the optical fiber core wires other than the optical fiber core wires colored in the first color and the second color. A third color having a color other than the color and having an L ^* a ^* b ^* color system saturation C ^* of 40 or less according to JISZ8729 is colored, and the remaining optical fiber cores included in each unit tape core are Colors other than those used for the 1st color, 2nd color, and 3rd color, and the color C ^* of the L ^* a ^* b ^* color system in JISZ8729 is colored with 40 or less or non-colored Therefore, each composite tape core wire is identified by the color emphasized by the second color and the presence or absence of the optical fiber core wire colored by the third color, and each unit tape included in each composite tape core wire The core wire is identified by the first color.

FIG. 16 is a diagram showing still another color arrangement pattern of the multi-fiber ribbon 40. As shown in FIG. In addition to the color arrangement pattern of the multi-core tape core wire 10 shown in FIG. 2, the composite tape core wires 41 to 45 include an optical fiber core wire (tracer optical fiber core wire) a colored in the first color and a second color. A third color for distinguishing two composite tape cores of the same color system is colored on the optical fiber cores c other than the colored optical fiber core (subtracer optical fiber core) d. As the third color, a color other than the colors used for the first color and the second color and a color saturation C ^* of the L ^* a ^* b ^* color system in JISZ8729 of 40 or less is used. In the multi-fiber ribbon 40 of the color arrangement pattern of FIG. 16, gray is used as the third color.

In addition to the color arrangement pattern of the multi-core tape core 10 shown in FIG. 2, the composite tape cores 46 to 50 have an optical fiber core (tracer optical fiber core) a colored in the first color and a second color. The optical fiber cores b and c other than the colored optical fiber core (subtracer optical fiber core) d are colored with a fourth color for identifying two composite tape cores of the same color system. For the fourth color, a color other than the colors used for the first color, the second color, and the third color, and the color C ^* of the L ^* a ^* b ^* color system in JISZ8729 is 40 or less is used. It is done. In the multi-fiber ribbon 40 of the color arrangement pattern in FIG. 16, light blue and pink are used as the fourth color. In the color arrangement pattern shown in FIG. 16, a different color is used for the fourth color colored on the two optical fiber cores b and c, but the two optical fiber cores b and c are colored. The fourth color may be the same color. Further, the fourth color may be colored only in one of the two optical fiber cores b and c.

  According to the color arrangement pattern of the multicore tape core 40 shown in FIG. 16, first, the composite tape cores 41 and 46 in which blue is emphasized, the composite tape cores 42 and 47 in which yellow is emphasized, and the green are emphasized. After identifying the composite tape cores 43 and 48, the composite tape cores 44 and 49 in which red is emphasized, and the composite tape cores 45 and 50 in which purple is emphasized, the third color or the third color in each unit tape core is identified. Since the composite tape core wire 41 and the composite tape core wire 46 may be identified based on the optical fiber core wires colored in four colors, for example, the composite tape core wires 41 to 50 can be easily identified.

  As described above, by configuring the multi-core tape core 40 with the color arrangement pattern shown in FIG. 16, the composite tape cores 41 to 50 have the colors emphasized by the second color, the third color, and the fourth color. Since the unit tape cores included in each of the composite tape cores 41 to 50 are identified based on the first color, the identification workability of the optical fiber cores is improved. Further, according to the multi-core tape core 40 having the color arrangement pattern shown in FIG. 16, the composite tape cores 41 to 50 are identified based on the color emphasized by the second color, the third color, and the fourth color. Accordingly, the number of colors used for coloring the optical fiber core wire can be reduced as compared with the multi-core tape core wire 40 having the color arrangement pattern shown in FIG.

As described above, according to the multi-core tape core having the above-described configuration, there are 50 unit tape cores in which four optical fiber cores are arranged in parallel, and five unit tape cores are arranged in parallel. 10 composite tape core wires, each of which is a light-transmitting covering material for restraining the unit tape core wires and restraining the five unit tape core wires, are arranged at one end serving as a reference in each unit tape core wire. The optical fiber core is colored with a different first color for each unit tape core contained in the same composite tape core, and other than the optical fiber core colored with the first color in each unit tape core. At least one optical fiber core is colored with a second color, and the second color is the same color system between the unit tape cores included in the same composite tape core, and two different composite tape cores If the second color between the unit tape cores contained in the same color is the same, one unit Used in the first color and the second color for the optical fiber core wires other than the optical fiber core wires colored in the first color and the second color. A color other than the color and the third color of C ^{* in the} JISZ8729 L ^* a ^* b ^* color system having a chroma C ^* of 40 or less was colored, included in the other unit tape core, and colored with the first color L ^* a in JISZ8729 is a color other than the colors used for the first color, the second color, and the third color in the optical fiber core wire other than the optical fiber core wire and the optical fiber core wire colored with the second color. ^* B ^* The fourth color with a chroma C ^{* of the} color system of 40 or less is colored, and the remaining optical fiber cores included in each unit tape core are the first, second, third, and the non-color used for four colors in a color a and JISZ8729 of ^L * ^a * ^{b *} color system ^a chroma ^{C *} 40 Each composite tape core is colored by the lower color or uncolored, and each composite tape core is identified by the color highlighted by the second color, the third color, and the fourth color. Each unit tape core wire included in is identified with a first color.

  Next, another multi-fiber ribbon will be described. FIG. 17 is a cross-sectional view showing the configuration of the multi-fiber ribbon 70. As shown in FIG. In addition, the same code | symbol is attached | subjected to the same element and detailed description is abbreviate | omitted. The multi-core tape core wire 70 includes five composite tape core wires 71 to 75. Each of the composite tape cores 71 to 75 is a covering material 22 having a function as a translucent restraining member that restrains 10 unit tape core wires by arranging 10 unit tape core wires in parallel. It has a constrained configuration. For example, in the composite tape core 71, ten unit tape cores 71 </ b> A to 71 </ b> J are restrained by the covering material 22.

  As described above, the multi-fiber ribbon 70 has 200 optical fibers. Note that the number of optical fiber cores constituting the unit tape core included in the multi-fiber ribbon 70 is not limited to four, and may be, for example, three or more, such as eight or twelve.

  Next, a color arrangement pattern colored on the optical fiber cores constituting the multi-fiber ribbon 70 will be described. FIG. 18 is a diagram showing a color arrangement pattern colored on the optical fiber cores constituting the multi-fiber ribbon 70.

  An optical fiber core (tracer optical fiber core) a disposed at one end serving as a reference in each unit tape core 71A to 75J is used to identify each unit tape core included in the same composite tape core. Each unit tape core of the same composite tape core is colored with a different first color.

  In the composite tape core 71, the optical fiber core a disposed at the left end of the unit tape core 71A is colored blue, and the optical fiber core a disposed at the left end of the unit tape core 71B is colored yellow. The optical fiber core c disposed at the left end of the unit tape core 71C is colored green, the optical fiber core a disposed at the left end of the unit tape core 71D is colored red, and the unit tape core 71E. The optical fiber core a disposed at the left end of the optical fiber is colored purple, the optical fiber core a disposed at the left end of the unit tape core 71F is colored white, and disposed at the left end of the unit tape core 71G. The optical fiber core a is colored brown, the optical fiber core a disposed at the left end of the unit tape core 71H is colored gray, and the optical fiber core a disposed at the left end of the unit tape core 71I is Colored pink Is, optical fiber a disposed on the left end of the unit ribbons 71J is colored orange. Also about the composite tape core wires 72-75, the 1st color is colored with the same color arrangement pattern as the composite tape core wire 71. FIG.

  At least one optical fiber core wire (sub-tracer optical fiber core wire) d other than the optical fiber core wire a colored with the first color in each unit tape core wire is used for identifying the composite tape core wires 71 to 75. The second color is colored.

  In the composite tape core 71, the optical fiber core d disposed at the right end of the unit tape core 71A is colored light blue, and the optical fiber core d disposed at the right end of the other unit tape cores 71B to 71J. Is colored blue.

  In the composite tape core wire 72, the optical fiber core wire d disposed at the right end of the unit tape core wire 72B is colored light yellow, and the optical fiber cores disposed at the right ends of the other unit tape core wires 72A, 72B to 72J. The line d is colored yellow.

  In the composite tape core wire 73, the optical fiber core wire d disposed at the right end of the unit tape core wire 73C is colored light green, and the light disposed at the right end of the other unit tape core wires 73A, 73B, 73D to 73J. The fiber core wire d is colored green.

  In the composite tape core 74, the optical fiber core d disposed at the right end of the unit tape core 74D is colored light red, and the light disposed at the right end of the other unit tape cores 74A to 74C and 74E to 74J. The fiber core wire d is colored red.

  In the case of the composite tape core wire 75, the optical fiber core wire d disposed at the right end of the unit tape core wire 75E is colored light purple and disposed at the right end of the other unit tape core wires 75A to 75D and 75F to 75J. The optical fiber core wire d is colored purple.

  By arranging the multi-core ribbon 70 in the above-described color scheme, blue is emphasized in the composite tape 71, yellow is emphasized in the composite tape 72, and green is emphasized in the composite tape 73. The composite tape core wire 74 emphasizes red, and the composite tape core wire 75 emphasizes purple.

  As described above, according to the multi-core tape core wire 70 having the color arrangement pattern shown in FIG. 18, first, the composite tape core wires 71 to 75 are identified based on the color emphasized by the second color, and the composite tape core wire 71. The identification workability is improved by identifying each unit tape core included in -75 based on the first color. Further, according to the multi-fiber ribbon 70 having the color arrangement pattern shown in FIG. 18, the composite tape cores 71 to 75 and the composite tape core 71 can be obtained without confirming the arrangement position of the colored optical fiber core. Since each unit tape core included in -75 can be identified, the identification work is facilitated.

As described above, according to the multi-core tape core having the above configuration, there are 50 unit tape cores in which four optical fiber cores are arranged in parallel, and ten unit tape cores are arranged in parallel. 5 composite tape cores, each of which is a light-transmitting coating material for restraining the unit tape core wires and restraining the 10 unit tape core wires, are arranged at one end serving as a reference in each unit tape core wire. The optical fiber core is colored with a different first color for each unit tape core contained in the same composite tape core, and other than the optical fiber core colored with the first color in each unit tape core. At least one of the optical fiber cores is colored with a second color, and the second color is the same color system between the unit tape cores included in the same composite tape core, and is included in different composite tape cores. Make sure that each unit tape core has a different color, and Murrell remaining coated optical fiber is colored with ^L * ^a * ^{b *} color saturation ^{C *} of 40 or less color color system in the first and second colors and a color other than the color used in the JISZ8729 Each composite tape core is identified with a color highlighted in the second color, and each unit tape core included in each composite tape core is identified with the first color. Is done.

  FIG. 19 is a diagram showing another color arrangement pattern of the multi-fiber ribbon 70. The color arrangement pattern of the composite tape core wire 71 is configured by combining the color arrangement patterns of the composite tape core wires 41 and 46 in the multi-core tape core wire 40 having the color arrangement pattern shown in FIG. In the composite tape core 71, the unit tape cores 41A to 41E of the composite tape core 41 are set as unit tape cores 71A to 71E, and the unit tape cores 46A to 46E of the composite tape core 46 are set to unit tape cores 71F to 71F. It is configured as 71J.

  Similarly to the composite tape core wire 71, the color arrangement pattern of the composite tape core wire 72 is configured by combining the color arrangement patterns of the composite tape core wires 41 and 47 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. The color arrangement pattern of the composite tape core wire 73 is configured by combining the color arrangement patterns of the composite tape core wires 43 and 48 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. 14 is configured by combining the color arrangement pattern with the composite tape core wires 44 and 49 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. 14, and the color arrangement pattern of the composite tape core wire 75 is the multi-core of the color arrangement pattern shown in FIG. It is configured by combining the color arrangement pattern with the composite tape core wires 45 and 50 in the tape core wire 40.

  By arranging the multi-fiber ribbon 70 in the color arrangement pattern shown in FIG. 19, blue is emphasized in the composite tape 71, yellow is emphasized in the composite tape 72, and green is emphasized in the composite tape 73. In the composite tape core wire 74, red is emphasized, and in the composite tape core wire 75, purple is emphasized.

  In this way, according to the multi-core tape core 70 of the color arrangement pattern shown in FIG. 19, first, the composite tape cores 71 to 75 are identified based on the color emphasized by the second color, and the composite tape core 71 Identification workability is improved by identifying each unit tape core included in ˜75 based on the position of the optical fiber core colored in the second color and the first color.

As described above, according to the multi-core tape core having the above configuration, there are 50 unit tape cores in which four optical fiber cores are arranged in parallel, and ten unit tape cores are arranged in parallel. 5 composite tape cores, each of which is a light-transmitting coating material for restraining the unit tape core wires and restraining the 10 unit tape core wires, are arranged at one end serving as a reference in each unit tape core wire. The optical fiber core is colored with the first color, and at least one optical fiber core other than the optical fiber core colored with the first color in each unit tape core is colored with the second color, The two colors have the same color system between the unit tape cores included in the same composite tape core, and different colors between the unit tape cores included in different composite tape cores. When the first color of the plurality of unit tape cores included in the line is the same color, The two colors are colored on the optical fiber cores at different arrangement positions, and the remaining optical fiber cores included in each unit tape core wire are colors other than those used for the first color and the second color. In addition, since L ^* a ^* b ^* color saturation C ^{* of the} color system in JISZ8729 is colored with a color of 40 or less or non-colored, each composite tape core wire is emphasized with the second color. Each unit tape core included in each composite tape core is identified by the arrangement position of the optical fiber core colored in the second color and the first color.

  FIG. 20 is a diagram showing still another color arrangement pattern of the multi-core tape core wire 70. The color arrangement pattern of the composite tape core wire 71 is configured by combining the color arrangement patterns with the composite tape core wires 41 and 46 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. In the composite tape core 71, the unit tape cores 41A to 41E of the composite tape core 41 are set as unit tape cores 71A to 71E, and the unit tape cores 46A to 46E of the composite tape core 46 are set to unit tape cores 71F to 71F. It is configured as 71J.

  Similarly to the composite tape core wire 71, the color arrangement pattern of the composite tape core wire 72 is configured by combining the color arrangement patterns of the composite tape core wires 42 and 47 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. The color arrangement pattern of the composite tape core wire 73 is configured by combining the color arrangement patterns of the composite tape core wires 73 and 78 in the multi-core tape core wire of the color arrangement pattern shown in FIG. 15 is configured by combining the color arrangement patterns of the composite tape core wires 44 and 49 in the multi-core tape core wire having the color arrangement pattern shown in FIG. 15, and the color arrangement pattern of the composite tape core wire 75 is the multi-core tape core wire having the color arrangement pattern shown in FIG. The combination tape core wires 45 and 50 are combined to form a color arrangement pattern.

  By arranging the multi-fiber ribbon 70 in the color arrangement pattern shown in FIG. 20, blue is emphasized in the composite tape 71, yellow is emphasized in the composite tape 72, and green is emphasized in the composite tape 73. In the composite tape core wire 74, red is emphasized, and in the composite tape core wire 75, purple is emphasized.

  In this way, by configuring the multi-core ribbon 70 with the color arrangement pattern shown in FIG. 20, the composite tape cores 71 to 75 are identified based on the color emphasized by the second color, and each composite tape core is identified. Each unit tape core included in the lines 71 to 75 is identified based on the presence or absence of the optical fiber core colored in the third color and the first color, so that the identification workability is improved.

As described above, according to the multi-core tape core having the above configuration, there are 50 unit tape cores in which four optical fiber cores are arranged in parallel, and ten unit tape cores are arranged in parallel. 5 composite tape cores, each of which is a light-transmitting coating material for restraining the unit tape core wires and restraining the 10 unit tape core wires, are arranged at one end serving as a reference in each unit tape core wire. The optical fiber core is colored with the first color, and at least one optical fiber core other than the optical fiber core colored with the first color in each unit tape core is colored with the second color, The two colors have the same color system between the unit tape cores included in the same composite tape core, and different colors between the unit tape cores included in different composite tape cores. When the first color of the two unit tape cores included in the line is the same color, Included in the first unit tape core wire, and used for the first color and the second color for the optical fiber core wires other than the optical fiber core wire colored with the first color and the optical fiber core wire colored with the second color. The remaining optical fiber cores included in each unit tape core are colored other than the above colors, and the third color of L ^* a ^* b ^* color system in which chromaticity C ^* is 40 or less in JISZ8729. A color other than the colors used for the first color, the second color, and the third color, and the color C ^* of the L ^* a ^* b ^* color system in JISZ8729 is colored with a color saturation C ^* of 40 or less, or non-colored Since each of the composite tape cores is colored, it is identified by a color emphasized by the second color, and each unit tape core included in each composite tape core is an optical fiber core colored in the third color. And the first color.

  FIG. 21 is a diagram showing another color arrangement pattern of the multi-fiber ribbon 70. FIG. The color arrangement pattern of the composite tape core wire 71 is configured by combining the color arrangement patterns of the composite tape core wires 41 and 42 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. In the composite tape core 71, the unit tape cores 41A to 41E of the composite tape core 41 are set as unit tape cores 71A to 71E, and the unit tape cores 42A to 42E of the composite tape core 42 are set to unit tape cores 71F to 71F. It is configured as 71J.

  Similarly to the composite tape core wire 71, the color arrangement pattern of the composite tape core wire 72 is configured by combining the color arrangement patterns of the composite tape core wires 43 and 44 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. The color arrangement pattern of the composite tape core wire 73 is configured by combining the color arrangement pattern with the composite tape core wires 45 and 46 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. 14 is configured by combining the color arrangement patterns of the composite tape core wires 47 and 48 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. 14, and the color arrangement pattern of the composite tape core wire 75 is the multi-core of the color arrangement pattern shown in FIG. It is configured by combining the color arrangement patterns of the composite tape cores 49 and 50 in the tape core 40.

  By arranging the multi-fiber ribbon 70 in the color arrangement pattern shown in FIG. 21, blue and yellow are emphasized in the composite tape 71, green and red are emphasized in the composite tape 72, and the composite tape 73 is combined. , Purple and blue are emphasized, yellow and green are emphasized in the composite tape core 74, and red and purple are emphasized in the composite tape core 75.

  In this way, by configuring the multi-core ribbon 70 with the color arrangement pattern shown in FIG. 21, the composite tape cores 71 to 75 are identified based on the color emphasized by the second color, and each composite tape core is identified. Each unit tape core included in the lines 71 to 75 is identified based on the arrangement position of the optical fiber core colored with the second color, the first color, and the like, so that the identification workability is improved.

  FIG. 22 is a diagram showing still another color arrangement pattern of the multi-fiber ribbon 70. FIG. The color arrangement pattern of the composite tape core wire 71 is configured by combining the color arrangement patterns with the composite tape core wires 41 and 42 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. In the composite tape core 71, the unit tape cores 41A to 41E of the composite tape core 41 are set as unit tape cores 71A to 71E, and the unit tape cores 42A to 42E of the composite tape core 42 are set to unit tape cores 71F to 71F. It is configured as 71J.

  Similarly to the composite tape core wire 71, the color arrangement pattern of the composite tape core wire 72 is configured by combining the color arrangement patterns of the composite tape core wires 43 and 44 in the multi-core tape core wire 40 of the color arrangement pattern shown in FIG. The color arrangement pattern of the composite tape core wire 73 is configured by combining the color arrangement patterns of the composite tape core wires 45 and 46 in the multi-core tape core wire 40 having the color arrangement pattern shown in FIG. 15 is configured by combining the color arrangement patterns of the composite tape core wires 47 and 48 in the multi-core tape core wire of the color arrangement pattern shown in FIG. 15, and the color arrangement pattern of the composite tape core wire 75 is the multi-core tape core of the color arrangement pattern shown in FIG. It is configured by combining the color arrangement patterns of the composite tape core wires 49 and 50 in the line 40.

  By arranging the multi-fiber ribbon 70 in the color arrangement pattern shown in FIG. 22, the composite tape core 71 emphasizes blue and yellow, the composite tape core 72 emphasizes green and red, and the composite tape core 73. , Purple and blue are emphasized, yellow and green are emphasized in the composite tape core 74, and red and purple are emphasized in the composite tape core 75.

  In this way, by configuring the multi-core ribbon 70 with the color arrangement pattern shown in FIG. 22, the composite tapes 71 to 75 are identified based on the color emphasized by the second color, and each composite tape core is identified. Each unit tape core included in the lines 71 to 75 is identified based on the presence or absence of the optical fiber core colored in the third color, the first color, etc., so that the identification workability is improved.

  In addition, you may use the composite tape core wire of another structure for a composite tape core wire. FIG. 23 is a cross-sectional view showing a configuration of another composite tape core wire. The composite tape core 80 has a configuration in which 20 optical fiber cores are arranged in parallel and the 20 optical fiber cores are constrained by a covering material 81. The composite tape core 80 forms one unit aggregate core with four optical fiber cores a to d sequentially from one end, and is composed of a total of five unit aggregate cores.

  FIG. 24 is a cross-sectional view showing the configuration of still another composite tape core wire 82. The composite tape core wire 82 has a configuration in which 20 optical fiber core wires are arranged in parallel and the 20 optical fiber core wires are constrained by a covering material 83. The composite tape core wire 82 is formed of four optical fiber core wires a to d in order from one end to form one unit assembly core wire, and is composed of a total of five unit assembly core wires. The covering material 83 is, for example, covered with 20 optical fiber core wires with substantially the same thickness. Therefore, the surface of the composite tape core wire 82 is formed in an uneven shape in which the space between the optical fiber core wires is recessed. As described above, the surface of the composite tape core wire may be formed not only as flat as the surface of the composite tape core wire 80 shown in FIG.

  FIG. 25 is a cross-sectional view showing a configuration of another composite tape core wire 84. The composite tape core 84 has a covering material 22 so as to form a recess 85 between adjacent unit tape cores with respect to the composite tape cores 11 to 15 constituting the multi-core tape core 10 shown in FIG. Each unit tape core wire is constrained. The recesses 85 are preferably formed on both surfaces of the composite tape core wire 84. By providing a recess 85 between adjacent unit tape cores in the composite tape core 84, when separating each unit tape core, each unit tape core can be easily separated by bending from the recess 85. Can do.

  Next, an optical cable using a multicore tape core wire will be described. FIG. 26 is a cross-sectional view showing the configuration of the optical cable 90. The optical cable 90 includes a cable core 92 and a jacket 94 formed of a synthetic resin such as polyethylene resin on the outer periphery of the cable core 92. The cable core 92 includes a multi-core tape core wire 10 and a tubular tube 96 that houses the multi-core tape core wire 10. The tube 96 is formed in a cylindrical shape with a synthetic resin such as polyethylene resin, for example. The multi-core tape core wire 10 is accommodated in the tube 96 in a state where five composite tape core wires 11 to 15 are laminated in order. A gap 98 is provided between the inner wall of the tube 96 and the multicore tape core wire 10. The gap 98 may be filled with a filler such as a synthetic resin.

  Next, another optical cable using a multi-fiber ribbon will be described. FIG. 27 is a cross-sectional view showing the configuration of the optical cable 100. The optical cable 100 includes a cable core 102 and a jacket 104 formed of a synthetic resin such as polyethylene resin on the outer periphery of the cable core 102. The cable core 102 includes a long slot 106 formed of a synthetic resin such as polyethylene resin. The slot 106 has a strength member 108 at the center thereof. The slot 106 is formed at a predetermined interval on the outer periphery of the slot 106, and a slot groove 110 for receiving the multi-core tape core wire 10 is provided. In the slot 106, for example, three slot grooves 110 are formed on the outer periphery of the slot 106 at substantially equal intervals. The slot groove 110 is formed in, for example, an SZ twist shape along the longitudinal direction. The slot groove 110 has a substantially rectangular cross section in the direction perpendicular to the longitudinal direction. Each slot groove 110 accommodates the multi-core tape core wire 10. The multicore tape core wire 10 is accommodated in the slot groove 110 in a state where five composite tape core wires 11 to 15 are sequentially stacked.

  A plurality of composite tape cores 11 to 11 constituting the multi-core tape core wire 10 when the outer cores 94 and 104 are peeled off and the multi-core tape core wire 10 is taken out in order to connect the optical cables 90 and 100 to the connectors. Even when 15 is laminated, the composite tape core wires 11 to 15 can be identified based on the color or the like emphasized by the second color described above, so that the identification work can be easily performed.

10, 40, 70 Multi-core tape core wire 22, 24, 81, 83 Coating material 85 Recess 90, 100 Optical cable 92, 102 Cable core 94, 104 Jacket 96 Tube 98 Clearance 106 Slot 108 Strength member 110 Slot groove

Claims (10)

A multi-fiber ribbon having a plurality of optical fibers,
Having a plurality of unit set cores in which a plurality of optical fiber cores are arranged in parallel,
A plurality of unit assembly cores are arranged in parallel, and a plurality of composite tape cores that constrain the plurality of unit assembly cores with a translucent restraining member that constrains the plurality of unit assembly cores,
The optical fiber core wire arranged at one end serving as a reference in each unit assembly core is colored with a first color different from each unit assembly core included in the same composite tape core,
At least one optical fiber core other than the optical fiber core colored with the first color in each unit assembly core is colored with the second color, and the second color is the same composite tape core. It is the same color system between each unit assembly core included, and different colors between each unit assembly core included in different composite tape cores,
The remaining optical fiber cores included in each unit assembly core are colors other than the colors used for the first color and the second color, and the saturation of the L ^* a ^* b ^* color system in JISZ8729 C ^* is colored with a color of 40 or less or non-colored,
Each of the composite tape cores is identified by a color emphasized by the second color, and each unit assembly core included in each of the composite tape cores is identified by the first color. Multi-fiber ribbon. A multi-fiber ribbon having a plurality of optical fibers,
Having a plurality of unit assembly cores in which three or more optical fiber cores are arranged in parallel;
A plurality of unit assembly cores are arranged in parallel, and a plurality of composite tape cores that constrain the plurality of unit assembly cores with a translucent restraining member that constrains the plurality of unit assembly cores,
The optical fiber core wire arranged at one end serving as a reference in each unit assembly core is colored with a first color different from each unit assembly core included in the same composite tape core,
At least one optical fiber core other than the optical fiber core colored with the first color in each unit assembly core is colored with the second color, and the second color is included in the same composite tape core. It is the same color system between each unit set core
When the second color between the unit assembly cores included in different composite tape cores is the same color, the second color is colored to the optical fiber cores at different arrangement positions,
The remaining optical fiber cores included in each unit assembly core are colors other than the colors used for the first color and the second color, and the saturation of the L ^* a ^* b ^* color system in JISZ8729 C ^* is colored with a color of 40 or less or non-colored,
Each composite tape core is identified by a color emphasized by the second color and an arrangement position of an optical fiber core colored by the second color, and each unit included in each composite tape core The multi-core ribbon is characterized in that the aggregate core is identified by the first color. A multi-fiber ribbon having a plurality of optical fibers,
Having a plurality of unit assembly cores in which three or more optical fiber cores are arranged in parallel;
A plurality of unit assembly cores are arranged in parallel, and a plurality of composite tape cores that constrain the plurality of unit assembly cores with a translucent restraining member that constrains the plurality of unit assembly cores,
The optical fiber core arranged at one end serving as a reference in each unit assembly core is colored with a different first color for each unit assembly core included in the same composite tape core,
At least one optical fiber core other than the optical fiber core colored with the first color in each unit assembly core is colored with the second color, and the second color is included in the same composite tape core. It is the same color system between each unit set core
When the second color between the unit assembly cores included in two different composite tape cores is the same color, the optical fiber included in one unit assembly core and colored with the first color L ^* a ^* b ^{* according to} JISZ8729, which is a color other than the color used for the first color and the second color, and an optical fiber core other than the core and the optical fiber core colored with the second color Color the third color with a chroma C ^* of 40 or less in the color system,
The remaining optical fiber cores included in each of the unit assembly cores are colors other than those used for the first color, the second color, and the third color, and the L ^* a ^* b ^* table in JISZ8729 The color system has a saturation C ^* of 40 or less, or is uncolored,
Each composite tape core is identified by the color emphasized by the second color and the presence or absence of an optical fiber core colored by the third color, and each unit set included in each composite tape core A multi-core ribbon is characterized in that the core is identified by the first color. A multi-fiber ribbon having a plurality of optical fibers,
Having a plurality of unit assembly cores in which three or more optical fiber cores are arranged in parallel;
A plurality of unit assembly cores are arranged in parallel, and a plurality of composite tape cores that constrain the plurality of unit assembly cores with a translucent restraining member that constrains the plurality of unit assembly cores,
The optical fiber core arranged at one end serving as a reference in each unit assembly core is colored with a different first color for each unit assembly core included in the same composite tape core,
At least one optical fiber core other than the optical fiber core colored with the first color in each unit assembly core is colored with the second color, and the second color is included in the same composite tape core. It is the same color system between each unit set core
When the second color between the unit assembly cores included in two different composite tape cores is the same color, the optical fiber included in one unit assembly core and colored with the first color L ^* a ^* b ^{* according to} JISZ8729, which is a color other than the color used for the first color and the second color, and an optical fiber core other than the core and the optical fiber core colored with the second color The third color of the color system having a saturation C ^* of 40 or less is colored, and is included in the other unit aggregate core, and is colored with the optical fiber core colored with the first color and the second color. Colors other than those used for the first color, the second color, and the third color, and the saturation of the L ^* a ^* b ^* color system in JISZ8729 C ^* is colored a fourth color of 40 or less,
The remaining optical fiber cores included in each unit assembly core are colors other than those used for the first color, the second color, the third color, and the fourth color, and L ^{* in} JISZ8729 a ^* b ^* color system Chromaticity C ^* is colored with 40 or less, or is not colored,
Each of the composite tape cores is identified by a color emphasized by the second color, the third color and the fourth color, and each unit assembly core included in each of the composite tape cores is A multi-fiber ribbon that is identified by a first color. A multi-fiber ribbon having a plurality of optical fibers,
Having a plurality of unit assembly cores in which three or more optical fiber cores are arranged in parallel;
A plurality of unit assembly cores are arranged in parallel, and a plurality of composite tape cores that constrain the plurality of unit assembly cores with a translucent restraining member that constrains the plurality of unit assembly cores,
The optical fiber core wire arranged at one end serving as a reference in each unit assembly core wire is colored with the first color,
At least one optical fiber core other than the optical fiber core colored with the first color in each unit assembly core is colored with the second color, and the second color is included in the same composite tape core. A plurality of unit assembly cores included in the same composite tape core are formed so as to have the same color system between the unit assembly cores and different unit assembly cores included in different composite tape cores. When the first color is the same color, the second color is colored optical fiber core wires at different arrangement positions,
The remaining optical fiber cores included in each unit assembly core are colors other than the colors used for the first color and the second color, and the saturation of the L ^* a ^* b ^* color system in JISZ8729 C ^* is colored with a color of 40 or less or non-colored,
Each of the composite tape cores is identified by a color emphasized by the second color, and each unit assembly core included in each of the composite tape cores is an optical fiber core colored with the second color. A multi-fiber ribbon that is identified by an arrangement position and the first color. A multi-fiber ribbon having a plurality of optical fibers,
Having a plurality of unit assembly cores in which three or more optical fiber cores are arranged in parallel;
A plurality of unit assembly cores are arranged in parallel, and a plurality of composite tape cores that constrain the plurality of unit assembly cores with a translucent restraining member that constrains the plurality of unit assembly cores,
The optical fiber core arranged at one end serving as a reference in each unit assembly core is colored with the first color,
At least one optical fiber core other than the optical fiber core colored with the first color in each unit assembly core is colored with the second color, and the second color is included in the same composite tape core. The unit set cores have the same color system, and the unit set cores included in different composite tape cores have different colors.
When the first color of two unit assembly cores included in the same composite tape core is the same color, an optical fiber core included in one unit assembly core and colored with the first color; An optical fiber core other than the optical fiber core colored with the second color has a color other than the colors used for the first color and the second color, and the L ^* a ^* b ^* color system of JISZ8729 Color a third color with a saturation C ^* of 40 or less,
The remaining optical fiber cores included in each of the unit assembly cores are colors other than those used for the first color, the second color, and the third color, and the L ^* a ^* b ^* table in JISZ8729 The color system has a saturation C ^* of 40 or less, or is uncolored,
Each of the composite tape cores is identified by a color emphasized by the second color, and each unit assembly core included in each of the composite tape cores is an optical fiber core colored with the third color. A multi-fiber ribbon that is identified by presence or absence and the first color. The multi-fiber ribbon according to any one of claims 1 to 6,
The multi-core ribbon cable, wherein the first color and the second color are colors having a saturation C ^* of L ^* a ^* b ^* color system of JISZ8729 greater than 40. The multi-fiber ribbon according to any one of claims 1 to 7,
The second color is colored on the optical fiber core at the other end included in each unit assembly core,
When the first color and the second color of the optical fiber cores included in each unit assembly core are made the same color system, the second color is changed to L ^* a ^{* in} JISZ8729 from the first color ^. b ^* A multi-fiber ribbon with a color difference ΔEcmc of the color system of 30 or less. The multi-fiber ribbon according to any one of claims 1 to 8,
The multi-core tape core is characterized in that the unit assembly core is a unit tape core. An optical cable,
A cable core having the multi-core tape core wire according to any one of claims 1 to 9,
An outer jacket provided on the outer periphery of the cable core and formed of a synthetic resin;
An optical cable comprising:

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