JP5520692B2 - Fiber optic cable - Google Patents

Description

  The present invention relates to an optical fiber cable that is used as a drop optical cable or an indoor optical cable in which tension members are arranged on both sides of an optical fiber core and are collectively covered with an outer sheath, and in particular, interposed between the optical fiber core and the outer sheath. It is related with the structure of the partition tape made.

In recent years, with the widespread use of the Internet, FTTH (Fiber To The Home) that realizes a high-speed communication service by drawing an optical fiber directly into a general home is rapidly expanding. Generally, an optical fiber cable used for FTTH contains a plurality of optical fibers. When an optical fiber is pulled down from this optical fiber cable to the FTTH user's house, it is necessary to branch the optical fiber cable in the middle to separate and take out the desired optical fiber. Usually, such an intermediate branching operation is performed in a live line state where transmission of an optical signal is not interrupted.
Therefore, various techniques have been proposed to prevent transmission loss from being increased due to bending or damage to the optical fiber when the intermediate branching operation of the optical fiber cable is performed in a live line state ( For example, Patent Document 1).

FIG. 7 is a diagram showing a cross-sectional structure of a self-supporting optical fiber cable disclosed in Patent Document 1. As shown in FIG. As shown in FIG. 7, in the optical fiber cable 50, tension members 52 are arranged on both sides in the width direction of an optical fiber assembly 51 in which eight optical fiber cores 51a are arranged in a two-stage stack, A partition tape 53 is arranged so as to be in contact with the arrangement surface of the optical fiber assembly 51, and these are integrally covered with a jacket 54. In addition, V-shaped notches 54 a and 54 b that are directed from the outside toward the arrangement surface of the optical fiber assembly 51 are formed at four locations (two locations on one side).
When the optical fiber cable 50 is branched in the middle, the notch 54a, 54b is used as a guide to cut the cutting blade of the dedicated tool into the jacket 54, and in this state, the tool is moved by a predetermined length in the longitudinal direction of the cable. Since the partition tape 53 is not bonded to the jacket 54 and the individual optical fiber cores 51 a, the jacket 54 is divided into four parts, and the partition tape 53 and the optical fiber assembly 11 are separated from the jacket 54. And in the divided | segmented part, the jacket 54 and the partition tape 53 are cut | disconnected, and the desired optical fiber core wire 51a is taken out.

Japanese Patent No. 4224092

As described above, in the optical fiber cable 50, since the partition tape 53 and the jacket 54 are not bonded, the partition tape 53 is separated from the jacket 54 at the time of intermediate branching. Therefore, in addition to the cutting of the outer cover 54 divided into four parts, a step of cutting the two partition tapes 53 is required.
As described above, in the conventional optical fiber cable 50, the number of cutting points in the intermediate branching operation increases, so that the operation time becomes long, and there is a danger that the optical fiber core wire 51a is accidentally cut or pinched and damaged. Increases nature.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an optical fiber cable that can execute an intermediate branching operation in a short time and can prevent damage to the optical fiber.

The invention according to claim 1 is an optical fiber assembly in which a plurality of optical fiber cores are arranged in parallel;
Tension members disposed on both sides in the width direction of the optical fiber assembly;
A partition tape disposed on both sides of the optical fiber assembly so as to contact the arrangement surface of the optical fiber assembly and sandwich the optical fiber assembly;
An outer cover that integrally covers the optical fiber assembly, the tension member, and the partition tape, and that is formed with two pairs of notches from both sides toward the arrangement surface of the optical fiber assembly,
In the optical fiber cable that is branched in the middle by dividing the jacket into a plurality of parts by making a notch reaching the partition tape with the notch as a guide,
The partition tape has a non-adhesive portion that is not bonded and integrated with the outer cover and the optical fiber assembly on one surface in contact with the optical fiber assembly, and the other surface is subjected to uneven processing. It has a bonding part that is bonded and integrated with the jacket.

According to a second aspect of the invention, the optical fiber cable according to claim 1, wherein the concavo-convex processing is the arithmetic mean height Ra of the contour curve in the region that has been subjected 10μm or more, the average length of the profile elements RSm Is 0.5 mm or less.

The invention according to claim 3 is an optical fiber assembly in which a plurality of optical fibers are arranged in parallel;
Tension members disposed on both sides in the width direction of the optical fiber assembly;
A partition tape disposed on both sides of the optical fiber assembly so as to contact the arrangement surface of the optical fiber assembly and sandwich the optical fiber assembly;
An outer cover that integrally covers the optical fiber assembly, the tension member, and the partition tape, and that is formed with two pairs of notches from both sides toward the arrangement surface of the optical fiber assembly,
In the optical fiber cable that is branched in the middle by dividing the jacket into a plurality of parts by making a notch reaching the partition tape with the notch as a guide,
The partition tape has a non-adhesive portion that is not bonded and integrated with the outer cover and the optical fiber assembly on one surface in contact with the optical fiber assembly, and is engaged with the outer cover on the other surface. It has an adhesion part which consists of an engagement piece and which is bonded and integrated with the jacket .

According to a fourth aspect of the present invention, in the optical fiber cable according to any one of the first to third aspects, the interval between the notches is larger than the array width of the optical fiber assembly, and the width of the partition tape. It is characterized by being set smaller.

The invention according to claim 5 is the optical fiber cable according to any one of claims 1 to 4 , wherein the width of the partition tape is set larger than the array width of the optical fiber assembly. It is characterized by.

A sixth aspect of the present invention is the optical fiber cable according to any one of the first to fifth aspects, wherein the width of the adhesive portion is set smaller than the interval between the notches. .

According to a seventh aspect of the present invention, in the optical fiber cable according to any one of the first to sixth aspects, the non-adhesive portion of the partition tape is made of a material having a higher melting point than the jacket. It is characterized by that.

  According to the present invention, since the partition tape is adhered to the outer cover at the time of intermediate branching, the outer cover and the partition tape can be simultaneously cut in one cutting step. Therefore, the intermediate branching operation can be performed in a short time, and damage to the optical fiber core wire can be prevented.

It is sectional drawing which shows the optical fiber cable which concerns on 1st Embodiment. It is an external appearance perspective view of an optical fiber cable. It is a figure for demonstrating the dimension design in an optical fiber cable. It is a figure which shows the state at the time of the middle branch of an optical fiber cable. It is sectional drawing which shows the optical fiber cable which concerns on 2nd Embodiment. It is sectional drawing which shows the optical fiber cable which concerns on 3rd Embodiment. It is sectional drawing which shows the conventional optical fiber cable.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
FIG. 1 is a sectional view showing an optical fiber cable 10 according to the first embodiment, and FIG. 2 is an external perspective view of the optical fiber cable 10.
As shown in FIGS. 1 and 2, the optical fiber cable 10 is a self-supporting optical fiber cable in which a cable portion 10 </ b> A and a support wire portion 10 </ b> B are intermittently connected by a narrow neck portion 10 </ b> C that is easy to cut. The cable portion 10 </ b> A has a configuration in which an optical fiber assembly 11, a tension member (strength member) 12, and a partition tape 13 are integrally covered with a jacket 14. The support wire portion 10B has a configuration in which, for example, a steel wire 15 having an outer diameter of 0.4 to 0.7 mm is covered with a jacket 16.
As shown in FIG. 2, in the optical fiber cable 10, the cable portion 10 </ b> A is connected to the support wire portion 10 </ b> B in a relaxed state, that is, a surplus length is provided, and a closure is attached to the optical fiber cable 10. It can be easily installed later.

In the cable portion 10A, the optical fiber assembly 11 includes four optical fiber cores 11a arranged in a line, and an upper optical fiber core wire in a valley formed between two adjacent optical fiber cores 11a in the lower layer. It is configured by stacking in a two-stage stack so that 11a is located. Here, the optical fiber core wire is obtained by applying a secondary coating made of an ultraviolet curable resin to an optical fiber strand obtained by applying a minimum necessary coating (primary coating) to a bare optical fiber.
The tension member 12 is made of, for example, a steel wire, a steel stranded wire, or fiber reinforced plastic, and is disposed on both sides in the width direction of the optical fiber assembly 11 in parallel with the optical fiber assembly 11. The tension member 12 relaxes the tension applied to the optical fiber core wire 11a.

The partition tape 13 is arranged vertically on the optical fiber assembly 11 so as to directly contact the arrangement surface of the optical fiber assembly 11 and sandwich the optical fiber assembly 11. In the first embodiment, the partition tape 13 is formed on the tape base material 13a made of a resin material having poor adhesion to the outer cover 14 and the adhesive layer 13b made of resin material having good adhesion to the outer cover 14 is formed. The configuration is as follows.
Here, “adhesiveness with the outer cover” means that it is easily separated from the outer cover 14 at the time of intermediate branching, and “good adhesion with the outer cover” means that it is easily separated from the outer cover 14 at the time of intermediate branching. It means following the outer jacket 14 without separation. That is, the tape base material 13 a becomes a non-adhesive portion that is not bonded and integrated with the outer cover 14, and the adhesive layer 13 b becomes an adhesive portion that is bonded and integrated with the outer cover 14.

The tape base material 13a is made of, for example, a material having a high melting point (eg, polyethylene terephthalate, polyethylene naphthalate, polyamide resin, or polyester elastomer resin) that does not melt at the temperature at which the jacket 14 is extruded. . Thereby, although the tape base material 13a is arrange | positioned in contact with the optical fiber aggregate | assembly 11 (individual optical fiber core wire 11a), it is not adhere | attached. That is, the partition tape 13 and the optical fiber assembly 11 can be easily separated at the time of intermediate branching.
Desirably, the tape base material 13 a is made of a material harder than the outer cover 14. As a result, even if the cicada punctures the oviposition tube into the jacket 14, further invasion of the oviposition tube is stopped by the tape base material 13a, so that the semi-resistance of the optical fiber cable 10 is improved.

The adhesive layer 13b is composed of a synthetic adhesive such as a polyamide adhesive, a polyurethane adhesive, or a polyolefin adhesive. In particular, by forming the adhesive layer 13b with a hot melt type adhesive that melts at a temperature at the time of extrusion molding of the outer cover 14, the partition tape 13 and the outer cover 14 can be easily bonded in the extrusion molding of the outer cover 14. Can do.
The adhesive layer 13b may be formed uniformly in the longitudinal direction with respect to the tape substrate 13a or may be partially formed. Normally, the removal length of the outer cover 14 is about 300 mm at the time of intermediate branching. Therefore, if the adhesive layer 13b is formed at an interval of, for example, 100 mm or less in the longitudinal direction, the partition tape 13 is not separated from the outer cover 14 at the intermediate branch portion it is conceivable that.

The jacket 14 is made of, for example, polyethylene, flame retardant polyolefin, or polyvinyl chloride, and integrally covers the optical fiber assembly 11, the tension member 12, and the partition tape 13. The outer jacket 14 is formed with two pairs of V-shaped notches 14 a and 14 b that are opposed to the arrangement surface of the optical fiber assembly 11 from both sides. With these notches 14a and 14b, the cutting blade can be accurately guided and bitten into a desired position of the outer jacket 14 with a relatively small pressing force.
The outer shape of the outer cover 14 may be substantially rectangular as shown in FIG. 1 or may be elliptical. Moreover, semi-tolerance can be improved by comprising the jacket 14 with a hard material. In this case, the partition tape 13 is not required to have a hardness for improving the semi-resistance.

Here, in the optical fiber cable 10, the arrangement width D of the optical fiber assembly 11, the width of the partition tape 13 (the width of the tape base 13a) Wt, the width Wa of the adhesive layer 13b, and the interval M between the notches 14a and 14b. It is desirable to set as shown in FIG.
That is, the interval M between the notches 14 a and 14 b is set to be larger than the arrangement width D of the optical fiber assembly 11 and smaller than the width Wt of the partition tape 13. By making the interval M between the notches 14a and 14b larger than the array width D of the optical fiber assembly 11, the optical fiber core wire 11a is not positioned on the axis of the notches 14a and 14b. Therefore, when the cutting blade is bitten into the jacket 14 using the notches 14a and 14b as guides, the optical fiber core wire 11a is not damaged even if the biting depth is accidentally increased. Further, by making the interval M between the notches 14 a and 14 b smaller than the width Wt of the partition tape 13, the cutting blade reliably reaches the partition tape 13. Therefore, the jacket 14 is reliably divided into four at the time of intermediate branching.

  The width Wt of the partition tape 13 is set to be larger than the arrangement width D of the optical fiber assembly 11. As a result, the partition tape 13 directly contacts the array surface of the optical fiber assembly 11 and covers the entire surface. Therefore, when the jacket 14 is extruded, the gap between the optical fiber assembly 11 and the partition tape 13 and the light The resin material of the jacket 14 does not enter the gap between the fiber cores 11a. That is, the arrangement surface of the optical fiber assembly 11 is not in contact with the jacket 14, and only the side surface is in close contact with the jacket 14. Therefore, the optical fiber assembly 11 is easily separated from the partition tape 13 and the outer jacket 14 at the time of intermediate branching.

  The width Wa of the adhesive layer is set to be smaller than the interval M between the notches 14a and 14b. As a result, when the notch 14a, 14b is used as a guide to cut the cutting blade into the outer cover 14, the partition tape 13 is covered with the outer cover 14 at the inner portions of the notches 14a, 14b (portions sandwiched between the notches 14a, 14b). On the other hand, the partition tape 13 is reliably separated from the outer cover 14 at the outer portions of the notches 14a and 14b.

FIG. 4 is a diagram illustrating a state of the optical fiber cable 10 at the time of intermediate branching. In FIG. 4, the support wire portion 10B and the neck portion 10C are omitted, and only the cable 10A is shown.
When the optical fiber cable 10 is branched in the middle, first, several portions (neck portion 10C) of the cable 10A and the support wire portion 10B are cut to separate the cable portion 10A and the support wire portion 10B. Then, using the four notches 14a and 14b formed in the jacket 14 as a guide, the cutting blade of the dedicated tool is bitten into the jacket 14, and in this state, the tool is moved by a predetermined length in the longitudinal direction of the cable. Since the partition tape 13 and the optical fiber assembly 11 are not bonded and the contact portion between the optical fiber assembly 11 and the outer sheath 14 is small, the outer sheath 14 is divided into four as shown in FIG. The body 11 is easily separated from the jacket 14. That is, the intermediate branching operation is performed without causing local bending of the optical fiber core wire 11a.

  At this time, since the partition tape 13 is bonded to the outer jacket 14, it follows the outer jackets 141 and 142 divided in the vertical direction. Depending on the width Wa of the adhesive layer 13b of the partition tape 13, the partition tape 13 may be adhered to the outer jackets 143 and 144 divided into left and right, but since it is small compared to the adhesive area with the outer jackets 141 and 142, It is easily separated from the jackets 143 and 144. If the width Wa of the adhesive layer 13b is set to be smaller than the interval M between the notches 14a and 14b (see FIG. 3), there is no adhesion area between the partition tape 13 and the jackets 143 and 144. Is naturally separated from the jackets 143, 144.

  And in the divided | segmented part, the jacket 14 and the partition tape 13 are cut | disconnected, and the desired optical fiber core wire 11a is taken out. At this time, since the jacket 141 or 142 and the partition tape 13 are bonded and integrated, the jackets 141 and 142 and the partition tape 13 bonded to them can be cut simultaneously. That is, the operator can perform the intermediate branching work without being aware of the presence of the partition tape 13.

Thus, the optical fiber cable 10 includes an optical fiber assembly 11 in which a plurality of optical fiber cores 11a are arranged in parallel, tension members 12 disposed on both sides in the width direction of the optical fiber assembly 11, The partition tape 13 disposed so as to be in contact with the arrangement surface of the optical fiber assembly 11, and the optical fiber assembly 11, the tension member 12, and the partition tape 13 are integrally covered, and the optical fiber assembly 11 from both sides. And an outer cover 14 in which two pairs of notches 14a and 14b are formed toward the arrangement surface.
The partition tape 13 has a non-adhesive portion (tape base material 13a) that is not bonded and integrated with the jacket 14 on one surface that contacts the optical fiber assembly 11, and is bonded and integrated with the jacket 14 on the other surface. It has an adhesive part (adhesive layer 13b) to be formed.
Then, the optical fiber cable 10 is divided into four parts by dividing the jacket 14 into four parts by making notches 14a, 14b formed in the jacket 14 as a guide and making a cut reaching the partition tape 13.

  According to the optical fiber cable 10, the operator can perform the intermediate branching work without being aware of the presence of the partition tape 13, so that workability is significantly improved. Further, since the intermediate branching operation is performed without causing local bending of the optical fiber core wire 11a, it is possible to prevent the transmission loss from being increased or the optical fiber from being damaged by the bending.

[Second Embodiment]
FIG. 5 is a cross-sectional view showing an optical fiber cable 20 according to the second embodiment.
Since the basic configuration of the optical fiber cable 20 is the same as that of the optical fiber cable 10 of the first embodiment, detailed description thereof is omitted. Components that are the same as or correspond to the components of the optical fiber cable 10 of the first embodiment are denoted by the reference numerals replaced by the 20th series.

  In the optical fiber cable 20 of the second embodiment, the structure of the partition tape 23 is different from that of the first embodiment. In other words, in the second embodiment, the partition tape 23 is made of a resin material having poor adhesion to the jacket 24, and one surface 23a in contact with the optical fiber assembly 21 is processed to be flat, and the other surface 23b is It is processed into irregularities. By processing the other surface 23b of the partition tape 23 into a concavo-convex shape, the partition tape 23 and the outer cover 24 are bonded by an anchor effect. That is, the flat surface 23a of the partition tape 23 becomes a non-adhesive portion that is not bonded and integrated with the outer cover 24, and the surface 23b processed into an uneven shape becomes an adhesive portion that is bonded and integrated with the outer cover 24.

  Here, in the surface 23b processed into the uneven shape, the arithmetic mean height Ra of the contour curve defined by JIS B 0601 is 10 μm or more, and the average length RSm of the contour curve element is 0.5 mm or less. It is desirable to make it. Thereby, the strong adhesive force of the grade which does not isolate | separate the partition tape 23 and the jacket 24 in an intermediate | middle branch operation | work is implement | achieved reliably.

  Further, the bonding width of the partition tape 23 (the width of the region processed on the unevenness) is set smaller than the notch interval. Thus, when the notch 24a, 24b is used as a guide to cut the cutting blade into the outer cover 24, the partition tape 23 is placed on the inner cover 14 of the notches 24a, 24b (portions sandwiched between the notches 24a, 24b). Adhered securely to the surface. On the other hand, the partition tape 23 is reliably separated from the jacket 24 at the outer portions of the notches 24a and 24b.

As described above, the partition tape 23 has a non-adhesive portion (surface 23a processed flat) that is not bonded and integrated with the outer cover 24 on one surface that comes into contact with the optical fiber assembly 21, and the outer surface on the other surface. It has an adhesion part (surface 23b processed on the unevenness) to be bonded and integrated with the cover 24.
Therefore, according to the optical fiber cable 20, since the operator can perform the intermediate branching work without being aware of the presence of the partition tape 23 as in the first embodiment, the workability is remarkably improved. Further, since the intermediate branching operation is performed without causing local bending of the optical fiber core wire 21a, it is possible to prevent the transmission loss from being increased or the optical fiber from being damaged due to the bending.

[Third Embodiment]
FIG. 6 is a cross-sectional view showing an optical fiber cable 30 according to the third embodiment.
Since the basic configuration of the optical fiber cable 30 is the same as that of the optical fiber cable 10 of the first embodiment, detailed description thereof is omitted. Components that are the same as or correspond to the components of the optical fiber cable 10 according to the first embodiment are denoted by the reference numerals replaced in the 30s.

In the optical fiber cable 30 of the third embodiment, the structure of the partition tape 33 is different from that of the first embodiment. That is, in the third embodiment, the partition tape 33 is made of a resin material having poor adhesion to the outer cover 34, and has an H-shaped cross section in which an engagement piece 33b that engages the outer cover 34 is connected to the tape base material 33a. It has become. The shape of the engagement piece 33b is not particularly limited as long as the engagement piece 33b is in a shape that maintains the state of being engaged with the outer cover 34 at the time of intermediate branching.
By providing the engagement piece 33b on one surface of the partition tape 33, the outer cover 34 enters and cures at the connecting portion between the tape base 33a and the engagement piece 33b. 33 cannot be removed. That is, the tape base material 33a of the partition tape 23 becomes a non-adhesive portion that is not bonded and integrated with the outer cover 34, and the engagement piece 33b becomes an adhesive portion that is bonded and integrated with the outer cover 34.

As described above, the partition tape 33 has a non-adhesive portion (tape base material 33 a) that is not bonded and integrated with the outer cover 34 on one surface in contact with the optical fiber assembly 31, and the outer cover 34 on the other surface. It has an adhesive part (engagement piece 33b) to be bonded and integrated.
Therefore, according to the optical fiber cable 30, as in the first embodiment, the operator can perform the intermediate branching work without being aware of the presence of the partition tape 33, so that workability is significantly improved. Further, since the intermediate branching operation is performed without causing local bending of the optical fiber core wire 31a, it is possible to prevent the transmission loss from being increased or the optical fiber from being damaged due to the bending.

  As mentioned above, although the invention made by this inventor was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

  For example, the configuration of the optical fiber assembly is not limited to the arrangement mode shown in the above embodiment. In the optical fiber assembly, for example, the number of optical fiber cores in one array may be four or more, or the number of optical fiber core wires (number of stacked layers) may be one or three or more. Alternatively, the optical fiber assembly may be configured by stacking so that the upper optical fiber core is positioned directly above the lower optical fiber core, instead of being stacked. Furthermore, a plurality of optical fiber ribbons, in which a plurality of optical fiber strands are arranged in parallel and integrated in a tape shape, can be stacked to constitute an optical fiber assembly.

For example, although the optical fiber cable provided with the support wire has been described in the above embodiment, the present invention can also be applied to an optical fiber cable that does not include the support wire.
Moreover, the adhesive force of a jacket and a partition tape can also be further strengthened by combining the structure of the partition tape in 1st Embodiment, 2nd Embodiment, and 3rd Embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 10 Optical fiber cable 10A Cable part 10B Support line part 10C Neck part 11 Optical fiber aggregate 11a Optical fiber core wire 12 Tension member 13 Partition tape 13a Tape base material (non-adhesion part)
13b Adhesive layer (adhesive part)
14 Jacket 14a, 14b Notch 15 Steel wire 16 Jacket

Claims (7)

An optical fiber assembly in which a plurality of optical fibers are arranged in parallel;
Tension members disposed on both sides in the width direction of the optical fiber assembly;
A partition tape disposed on both sides of the optical fiber assembly so as to contact the arrangement surface of the optical fiber assembly and sandwich the optical fiber assembly;
An outer cover that integrally covers the optical fiber assembly, the tension member, and the partition tape, and that is formed with two pairs of notches from both sides toward the arrangement surface of the optical fiber assembly,
In the optical fiber cable that is branched in the middle by dividing the jacket into a plurality of parts by making a notch reaching the partition tape with the notch as a guide,
The partition tape has a non-adhesive portion that is not bonded and integrated with the outer cover and the optical fiber assembly on one surface in contact with the optical fiber assembly, and the other surface is subjected to uneven processing. An optical fiber cable having an adhesive portion bonded and integrated with the outer jacket. 2. The optical fiber according to claim 1 , wherein the arithmetic average height Ra of the contour curve in the region where the unevenness is applied is 10 μm or more and the average length RSm of the contour curve element is 0.5 mm or less. cable. An optical fiber assembly in which a plurality of optical fibers are arranged in parallel;
Tension members disposed on both sides in the width direction of the optical fiber assembly;
A partition tape disposed on both sides of the optical fiber assembly so as to contact the arrangement surface of the optical fiber assembly and sandwich the optical fiber assembly;
An outer cover that integrally covers the optical fiber assembly, the tension member, and the partition tape, and that is formed with two pairs of notches from both sides toward the arrangement surface of the optical fiber assembly,
In the optical fiber cable that is branched in the middle by dividing the jacket into a plurality of parts by making a notch reaching the partition tape with the notch as a guide,
The partition tape has a non-adhesive portion that is not bonded and integrated with the outer cover and the optical fiber assembly on one surface in contact with the optical fiber assembly, and is engaged with the outer cover on the other surface. An optical fiber cable having an adhesive portion made of an engagement piece and integrally bonded to the jacket. Interval of the notch is larger than the arrangement width of the optical fiber assembly, an optical fiber according to any one of claims 1 to 3, characterized in that is smaller than the width of the partition tape cable. The partition tape width, the optical fiber cable according to claim 1, any one of 4, characterized in that it is set larger than the arrangement width of the optical fiber assembly. The optical fiber cable according to any one of claims 1 to 5 , wherein a width of the adhesive portion is set to be smaller than an interval between the notches. The optical fiber cable according to any one of claims 1 to 6 , wherein the non-bonded portion of the partition tape is made of a material having a melting point higher than that of the jacket.

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