JP6996558B2 - Fiber optic cable - Google Patents

Description

The present invention relates to an optical fiber cable.
This application claims priority based on Japanese Application No. 2017-092226 filed on May 8, 2017, and incorporates all the contents described in the Japanese application.

Patent Document 1 discloses an optical fiber cable on which three release tapes (interventions) are mounted.

Japanese Unexamined Patent Publication No. 2009-217195

The optical fiber cable of the present disclosure is a wire connecting a tape core wire in which a plurality of optical fiber core wires are arranged, two tension members arranged on both sides of the tape core wire, and the two tension members. It is provided with two flat plate-shaped interpositions arranged across the tape core wire at a position parallel to the minute, and the two tension members and the two flat plate-shaped interpositions are substantially rectangular in the cable jacket. It is an optical fiber cable that is integrally coated so as to be, and two pairs of tear notches are formed in the longitudinal direction of the cable jacket, and the two flat plate-like interpositions are each of the two pairs of tear notches. It has a length exceeding the line segment connecting the two plates, and has a cushioning material between the two plate-shaped interpositions, and the cushioning material keeps the distance between the two plate-shaped interpositions at a substantially predetermined value. The cushioning material is an optical fiber cable in contact with the tape core wire.

It is a figure which shows an example of the optical fiber cable by 1st Embodiment of this invention. It is a figure which shows the state after the split by the special splitting tool of an example of the optical fiber cable by 1st Embodiment of this invention. It is a figure which shows an example of the optical fiber cable by 2nd Embodiment of this invention. It is a figure which shows an example of the optical fiber cable by the 3rd Embodiment of this invention. It is a figure which shows an example of the optical fiber cable by 4th Embodiment of this invention. It is a figure which shows an example of the optical fiber cable by 5th Embodiment of this invention. It is a figure which shows the conventional optical fiber cable. It is a figure which shows the exclusive split tool of the conventional optical fiber cable. It is a figure which shows the state after the split by the special splitting tool of the conventional optical fiber cable. It is a figure which shows the state which the blade of the special split tool is inserted into the notch when the conventional optical fiber cable is reduced the core, and the optical fiber core wire and the flat plate-like interposition are arranged in contact with each other. It is a figure which shows the state which the conventional optical fiber cable has a small core, and the optical fiber core wire and a flat plate-like interposition are arranged separately. It is a figure which shows an example of the state which the intermittent tape core wire is closed. It is a figure which shows an example of the state which the intermittent tape core wire is opened in the arrangement direction.

[Problems to be solved by this disclosure]
The FTTH (Fiber To The Home) service, which connects telecommunications carriers and homes directly with optical fiber and provides high-speed communication services, has started, and with the introduction of optical fiber to subscribers' homes and the expansion of premises networks, multiple services have been launched. There is an increasing demand for wiring work to be distributed to homes and multiple terminals. In order to improve the workability of wiring work, the diameter and weight of optical fiber cables for wiring have been reduced (so-called core reduction).

3A, 3B, and 3C are diagrams showing a conventional optical fiber cable for wiring and a dedicated split tool. FIG. 3A shows an optical fiber cable, FIG. 3B shows a dedicated splitting tool, and FIG. 3C shows a state in which the optical fiber cable is split by the dedicated splitting tool. In the figure, 100 is an optical fiber cable, 101 is a cable jacket, 102 is a tension member, 103 is an optical fiber core wire, 104 is a flat plate-like interposition, 105 is a tear notch, 106 is a support wire, 107 is a support wire coating, 108. Indicates a connecting part.

The optical fiber cable 100 is a self-supporting optical fiber cable, and a plurality of optical fiber core wires 103 are arranged side by side in a substantially central portion of a cable sheath (also referred to as a sheath) 101 without twisting. A flat plate-shaped interposition 104 made of plastic is arranged so as to sandwich the core wire 103. Tension members (also referred to as tensile strength bodies) 102 are integrally embedded on both sides of the optical fiber core wire 103, and a V-shaped notch 105 for taking out the optical fiber core wire 103 is formed.

Further, the optical fiber cable 100 includes a support wire 106, the support wire 106 being made of, for example, a steel wire having a diameter of 1.2 to 2.6 mm, and the support wire coating 107 covering the support wire 106 is a connecting portion. It is integrally molded with the cable jacket 101 with low-density polyethylene or the like via 108. The optical fiber cable 100 is used as an indoor or drop optical fiber cable regardless of the presence or absence of the support wire portion.

As shown in FIG. 3B, in the dedicated split tool 110, the blade 112 is formed in the base member 111, and when the optical fiber cable 100 is set in the recess of the base member 111 and sandwiched, the blade 112 fits into the tear notch 105. It is arranged like this. By using this dedicated split tool 110, the optical fiber core wire 103 can be taken out in a short time at the intermediate portion of the laid optical fiber cable 100. Specifically, by inserting the blade 112 of the dedicated dividing tool 110 into the tear notch 105 of the optical fiber cable 100, the fiber can be divided as shown in FIG. 3C and the optical fiber core wire 103 can be taken out. The blade 112 of the dedicated split tool 110 is provided with a length in which the optical fiber cable 100 is sandwiched and the opposing blade tips are separated from each other at a fixed distance (for example, 0.62 mm) to be a predetermined value in a closed state. The depth of cut of the optical fiber cable 100 with respect to the cable jacket 101 is regulated.

In the above, when the flat plate-shaped interposition 104 arranged in parallel with the optical fiber core wire 103 is arranged so as to be in contact with the optical fiber core wire, the optical fiber core wire 103 is attached to the cable jacket 101 due to the presence of the interposition. It becomes difficult to be buried. Further, the optical fiber core wire 103 is composed of two 4-core tape core wires (8 cores) having a diameter of 0.25 mm as shown in FIG. 3A, but the distance between the flat plate-shaped interpositions 104 is dedicated. By setting the distance (substantially predetermined value) so that the blade 112 of the dividing tool 110 can reach, the optical fiber core wire 103 can be easily taken out without damaging the optical fiber core wire 103.

However, if the sum of the cross-sectional areas of the mounted optical fiber core wire 103 becomes small due to the reduction of the core of the optical fiber cable 100 or the diameter reduction of the optical fiber core wire 103, the distance between the flat plate-shaped interpositions 104 is sufficient. There is a problem that the blade 112 of the dedicated split tool 110 cannot reach the flat plate-shaped interposition 104, and it becomes difficult to take out the optical fiber core wire 103. This will be described with reference to FIGS. 4A and 4B below.

FIG. 4A shows a state in which the 8-core optical fiber core wire 103 having a reduced diameter and the flat plate-shaped interposition 104a are arranged in contact with each other, and the blade 112 of the dedicated split tool 110 is inserted into the tear notch 105, and FIG. 4B shows a state. It shows a state in which the 8-core optical fiber core wire 103, which is also reduced in diameter, and the flat plate-shaped interposition 104b are arranged at a distance. In FIGS. 4A and 4B, the optical fiber core wires 103 have the same number of cores, but the sum of the cross-sectional areas is smaller than that of the optical fiber core wires 103 in FIG. 3A.

As shown in FIG. 4A, when the optical fiber core wire 103 and the flat plate-shaped interposition 104a are arranged in contact with each other, the distance between the flat plate-shaped interpositions 104a is narrower than that in the case of FIG. 3A. When the blade 112 is divided using the above, the blade 112 does not reach the flat plate-shaped interposition 104a. If the blade is lengthened, it can be reached, but it is necessary to prepare multiple types of tools, and a large force is required to insert the blade, which may damage the blade.

On the other hand, as shown in FIG. 4B, when the optical fiber core wire 103 and the flat plate-shaped interposition 104b are arranged without being in contact with each other, a certain distance (substantially predetermined value) is secured between the flat plate-shaped intervening 104b and is dedicated. The blade 112 of the dividing tool 110 reaches the flat plate-shaped interposition 104b, but the optical fiber core wire 103 is buried in the cable sheath 101. As a result, in any of the cases shown in FIGS. 4A and 4B, it becomes difficult to take out the optical fiber core wire 103 using the dedicated dividing tool 110.

On the other hand, in Patent Document 1, three release tapes (intervening) are mounted, and the optical fiber core wire (including the tape core wire) can be easily taken out without being adhered or embedded in the cable sheath. Fiber optic cables that can be made are disclosed. According to the structure of Patent Document 1, of the three mounted release tapes (interventions), the central release tape (intervention) is arranged between at least two rows of optical fiber core wires and has a notch. It has a width protruding from both ends of the fiber optic core line so as to intersect the notch axis, and the outer release tape (intervening) touches the outermost surface of the fiber optic core line and does not intersect the notch axis. Has a width that completely covers the outermost surface of the optical fiber core train.

However, in the optical fiber cable described in Patent Document 1 above, a general tool such as nippers is used for cutting the cable jacket, and a special split tool having a constant blade length is used. Is not expected. Therefore, the distance between the outer release tapes (interventions) does not affect the ease of taking out the optical fiber core wire, but the work is difficult because the dedicated dividing tool is not used.

Therefore, even if the sum of the cross-sectional areas of the mounted optical fiber core wires becomes small due to the reduction of the cores of the optical fiber cables and the diameter reduction of the optical fiber core wires, it is flat enough to reach the blade of the dedicated split tool. It is an object of the present invention to provide an optical fiber cable in which the distance between interpositions is maintained at a substantially specified value and the optical fiber core wire is not buried in the cable sheath and the optical fiber core wire can be easily taken out.

[Effect of this disclosure]
According to the present disclosure, even if the sum of the cross-sectional areas of the mounted optical fiber core wires becomes small due to the reduction of the cores of the optical fiber cables and the diameter reduction of the optical fiber core wires, the distance between the flat plate-shaped interpositions is reduced. It is possible to provide an optical fiber cable in which the optical fiber core wire can be easily taken out by a dedicated dividing tool without the optical fiber core wire being buried in the cable sheath.

[Explanation of Embodiment of the present invention]
First, embodiments of the present invention will be listed and described.
The invention of the optical fiber according to one aspect of the present invention is as follows: (1) a tape core wire in which a plurality of optical fiber core wires are arranged, two tension members arranged on both sides of the tape core wire, and the said. The two tension members and the two flat plate-shaped intervening members are provided with two flat plate-shaped interpositions arranged across the tape core wire at positions parallel to the line segment connecting the two tension members. Is an optical fiber cable integrally covered with a cable sheath so as to have a substantially rectangular shape, and two pairs of tear notches are formed in the longitudinal direction of the cable sheath, and the two flat plate-like interpositions are formed. It has a length exceeding the line segment connecting each of the two pairs of tear notches, and has a cushioning material between the two plate-shaped interpositions, and the cushioning material causes the distance between the two plate-shaped interpositions. Is held at a substantially predetermined value, and the cushioning material is an optical fiber cable in contact with the tape core wire. Even if the sum of the cross-sectional areas of the mounted optical fiber core wires becomes smaller due to the reduction in the number of cores of the optical fiber cables and the reduction in the diameter of the optical fiber core wires, the distance between the flat plate-shaped interpositions is maintained at a substantially predetermined value. Moreover, the optical fiber core wire is not buried in the cable sheath, and the optical fiber core wire can be easily taken out by a dedicated dividing tool.

(2) It is preferable that the distance between the two plate-shaped interpositions is maintained at a substantially predetermined value by the tape core wire and the cushioning material. By using the tape core wire itself as a spacing member and reducing the amount of cushioning material used, the manufacturing cost of the optical fiber cable can be reduced.

(3) It is preferable that the cushioning material is arranged so that the contact angle between the end center of the tape core wire and the cable jacket is 180 ° or less. Since the contact angle with the cable sheath is small, the end core of the tape core wire is less likely to be buried in the cable sheath, and when the tape core wire is picked up with a fingertip and pulled out, the tape resin peels off and separates the single core. Can be prevented and the tape core wire can be safely taken out from the cable jacket.

(4) The distance between the two flat plate-shaped interpositions is maintained at a substantially predetermined value only by the cushioning material, and at least one of the two flat plate-shaped interpositions is not in contact with the tape core wire. preferable. By arranging the cushioning material in the horizontal direction at a position orthogonal to the direction (vertical direction) connecting the centers of the two tension members with respect to the tape core wire, the distance between the two flat plate-shaped interpositions is approximately a predetermined value. Can be held in.

(5) It is preferable that the tape core wire is an intermittent tape core wire in which adjacent optical fiber core wires are intermittently connected by a connecting portion and a non-connecting portion. After removing the tape core wire from the cable jacket, it becomes easy to separate the optical fiber core wire into a single core.

[Details of Embodiments of the present invention]
Hereinafter, preferred embodiments of the optical fiber cable according to the present invention will be described with reference to the accompanying drawings. It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

(First Embodiment)
FIG. 1A is a diagram showing an example of an optical fiber cable according to the first embodiment of the present invention. The optical fiber cable 10 has, for example, a main body portion 20 having a substantially rectangular cross section. The optical fiber cable 10 has a self-supporting structure in which the main body 20 and the support wire 16 whose circumference is covered with the support wire coating 17 are connected by the connecting portion 18, like an optical fiber cable for outdoor use. Is also applicable.

The main body 20 has a tape core wire 13 in the center, and a pair of tension members 12 are provided on both sides thereof, and are integrally covered with a cable outer cover 11.
The tape core wire 13 is, for example, four optical fiber core wires arranged in parallel and integrated in a tape shape with a common coating over the entire length.
The optical fiber core wire is, for example, a glass fiber having a standard outer diameter of 125 μm coated with a coating outer diameter of about 250 μm, which is called an optical fiber wire, and further coated with a coloring coating on the outside. The fiber is not limited to these, and may be a fine fiber having a coating outer diameter of about 165 μm or 200 μm. Further, as the number of cores of the optical fiber, any number of cores such as 2 cores and 8 cores can be selected.

Further, instead of the above-mentioned tape core wire, an intermittent tape core wire as shown in FIGS. 5A and 5B may be used. FIG. 5A shows a state in which the intermittent tape core wire is closed, and FIG. 5B shows a state in which the intermittent tape core wire is opened in the arrangement direction. The intermittent tape core wire 5 is formed by arranging four optical fiber core wires 1 to 4 in a parallel row and intermittently connecting adjacent optical fiber core wires by a connecting portion 6a and a non-connecting portion 6b. It is a thing. It is not necessary to provide the connecting portion 6a and the non-connecting portion 6b for each core, and for example, the connecting portion 6a and the non-connecting portion 6b may be provided for every two cores.

Alternatively, it may be a tape core wire in which the coating is recessed so as to follow the shape of each optical fiber core wire. In the case of this structure, when the coating is squeezed with a tool, cracks are generated between the core wires due to the stress, so that the coating can be easily divided into each optical fiber core wire. Further, instead of the tape core wire, a plurality of single core optical fiber core wires may be arranged.

The tension members 12 are arranged on both sides of the tape core wire 13 substantially in parallel along the longitudinal direction of the tape core wire 13. For the tension member 12, for example, steel wire, FRP (Fiber Reinforced Plastics), aramid fiber, or the like is used as a wire material having a proof stress against tension and compression. When two tension members 12 are arranged side by side, the optical fiber cable 10 is difficult to bend in the direction connecting the centers of the tension members 12 (also referred to as the vertical direction), and is orthogonal to the direction connecting the centers of the tension members 12. It becomes easier to bend (horizontally).

As shown in FIG. 1A, a flat plate-shaped interposition 14 and a cushioning material 19 are provided around the tape core wire 13.
Two flat plate-shaped interpositions 14 are arranged so as to be arranged at positions parallel to the direction connecting the centers of the two tension members 12, and extend in the longitudinal direction of the cable with the tape core wire 13 interposed therebetween. The flat plate-shaped interposition 14 is, for example, a member made of polyethylene terephthalate (PET), and protects the tape core wire 13 inside the cable sheath 11 during extrusion molding or when the optical fiber cable 10 is disassembled.

The cushioning material 19 is, for example, a fibrous member made of polyethylene (PE), and two cushioning materials 19 are arranged at positions parallel to the direction connecting the centers of the two tension members 12 and sandwich the tape core wire 13. , Is in contact with the tape core wire 13. As the member of the cushioning material 19, a resin yarn such as polypropylene (PP) or polyethylene terephthalate (PET) may be used, but the cushioning material 19 may not be made of resin.
By adjusting the width of the cushioning material 19 and arranging the two cushioning materials 19 side by side with the tape core wire 13 between the flat plate-shaped interpositions 14, the blade of the dedicated dividing tool just adjusts the distance between the flat plate-shaped interpositions 14. The distance is set so that it can be reached (approximately a predetermined value).
As shown in FIG. 1A, the cushioning material 19 is arranged so that the contact angle between the end center of the tape core wire 13 and the cable jacket 11 is 180 ° or less. Since the contact angle with the cable sheath 11 is small, the end core of the tape core wire 13 is less likely to be buried in the cable sheath 11, and when the tape core wire 13 is picked up with a fingertip and pulled out, the tape resin is peeled off and simply. It is possible to prevent the cores from separating, and the tape core wire 13 can be safely taken out from the cable jacket 11.

The cable outer cover 11 constitutes the coating of the main body portion 20, and is formed by, for example, extrusion molding a resin made of low-density polyethylene, and covers the tape core wire 13, the tension member 12, the flat plate-shaped interposition 14, and the like. The substantially rectangular main body 20 is provided with a long side surface having a width of about 6 mm in the direction connecting the centers of the two tension members 12 (vertical direction), with respect to the direction connecting the centers of the tension members 12. A short side surface having a width of about 3 mm is provided in a direction orthogonal to each other (horizontal direction).

Two pairs of tear notches 15 for tearing the outer cover are provided on the long side surface of the main body portion 20. The tear notch 15 is formed in a V-shaped cross section, and the tip located on the bisector of the V-shape is orthogonal to the direction connecting the centers of the two tension members 12 (horizontal direction). We are facing each other.

FIG. 1B is a diagram showing a state after division by a dedicated dividing tool, which is an example of an optical fiber cable according to the first embodiment of the present invention. The main body 20 of the optical fiber cable 10 is divided as shown in the figure by inserting the blade 112 of the dedicated dividing tool 110 into the tear notch 15, and the tape core wire 13 can be taken out.

(Second Embodiment)
FIG. 2A is a diagram showing an example of an optical fiber cable according to a second embodiment of the present invention. Although the number of cores of the tape core wire 13 is the same as that of the second embodiment and the first embodiment described with reference to FIG. 1A, the position, size, and number of the cushioning materials 19 are different. Specifically, in the optical fiber cable 10 shown in FIG. 2A, one cushioning material 19 is arranged at a position parallel to the direction connecting the centers of the two tension members 12, and the two flat plate-shaped interpositions 14 are arranged. It is provided so as to be sandwiched between two tape core wires 13 in contact with each of the facing surfaces. Further, one cushioning material 19 in the present embodiment corresponds to two cushioning materials 19 in the first embodiment in a direction (lateral direction) orthogonal to the direction connecting the centers of the two tension members 12. It has a thickness that allows it to be used. Since other structures are the same as those of the first embodiment, detailed description thereof will be omitted.
Also in this embodiment, the cushioning material 19 is arranged so that the contact angle between the end center of the tape core wire 13 and the cable outer cover 11 is 180 ° or less, and the end center of the tape core wire 13 is the cable outer cover. It is hard to be buried in 11.

(Third Embodiment)
FIG. 2B is a diagram showing an example of an optical fiber cable according to a third embodiment of the present invention. Although the number of cores of the tape core wire 13 is the same as that of the third embodiment and the first embodiment described with reference to FIG. 1A, the position, size, and number of the cushioning materials 19 are different. Specifically, in the optical fiber cable 10 shown in FIG. 2B, one cushioning material 19 is arranged at a position parallel to the direction connecting the centers of the two tension members 12, and the two flat plate-shaped interpositions 14 are arranged. It is provided in contact with one of the facing surfaces. Here, two tape core wires 13 are arranged side by side in the direction (vertical direction) connecting the centers of the two tension members 12, and are different from the flat plate-shaped interposition 14 in which the cushioning material 19 and the cushioning material 19 are in contact with each other. It is provided sandwiched between the flat plate-shaped interposition 14. Further, one cushioning material 19 in the present embodiment has two cushioning materials 19 and 1 in the first embodiment in a direction (lateral direction) orthogonal to the direction connecting the centers of the two tension members 12. It has a thickness corresponding to that of the tape core wire 13. Since other structures are the same as those of the first embodiment, detailed description thereof will be omitted.
Also in the present embodiment, as in the second embodiment, the cushioning material 19 is arranged so that the contact angle between the end core of the tape core wire 13 and the cable jacket 11 is 180 ° or less, and the tape core wire is arranged. The end center of 13 is less likely to be buried in the cable outer cover 11.

(Fourth Embodiment)
FIG. 2C is a diagram showing an example of an optical fiber cable according to a fourth embodiment of the present invention. Although the number of cores of the tape core wire 13 is the same as that of the fourth embodiment and the first embodiment described with reference to FIG. 1A, the positions and the number of cushioning materials 19 are different. Specifically, in the optical fiber cable 10 shown in FIG. 2C, the cushioning material 19 is orthogonal to both sides and the same direction in the direction (longitudinal direction) connecting the centers of the two tension members 12 with respect to the tape core wire 13. A total of four are arranged at the positions where the two plates are arranged, and each of the two flat plate-shaped interpositions 14 is provided in contact with a part or all of one side. Here, two tape core wires 13 are arranged side by side at positions parallel to the direction connecting the centers of the two tension members 12, and are surrounded by four cushioning materials 19. Further, of the four cushioning materials 19 in the present embodiment, the two cushioning materials 19 provided at positions parallel to the direction connecting the centers of the two tension members 12 are the first in the lateral direction. It has a thickness corresponding to the two cushioning materials 19 in the embodiment. Since other structures are the same as those of the first embodiment, detailed description thereof will be omitted.
In the present embodiment, as in the first embodiment, the cushioning material 19 is arranged at a position parallel to the direction connecting the centers of the two tension members 12, and two tape core wires 13 are arranged. By arranging the tape core wire 13 at a position orthogonal to the direction connecting the center of the tension member 12 (vertical direction), the tape core wire 13 does not contact the cable sheath 11 at all, and the tape core wire 13 is taken out when the tape core wire 13 is taken out. It is possible to prevent the tape resin covering the 13 from peeling off and separating the single cores, and the tape core wire 13 can be more safely taken out from the cable jacket 11.

(Fifth Embodiment)
FIG. 2D is a diagram showing an example of an optical fiber cable according to a fifth embodiment of the present invention. Although the number of cores of the tape core wire 13 is the same as that of the fifth embodiment and the first embodiment described with reference to FIG. 1A, the position and size of the cushioning material 19 are different. Specifically, in the optical fiber cable 10 shown in FIG. 2D, two cushioning materials 19 are arranged at positions orthogonal to the direction (longitudinal direction) connecting the centers of the two tension members 12 with respect to the tape core wire 13. The two flat plate-shaped interpositions 14 are provided so as to be partially in contact with the facing surfaces thereof. Here, two tape core wires 13 are arranged side by side at positions parallel to the direction connecting the centers of the two tension members 12, and are sandwiched between the two cushioning materials 19. At least one of the two flat plate-shaped interpositions 14 is in non-contact with the tape core wire 13, and as shown in the figure, the cable jacket 11 is surrounded by the tape core wire 13, the flat plate-shaped interposition 14 and the cushioning material 19. It does not exist in the area. Since other structures are the same as those of the first embodiment, detailed description thereof will be omitted.
In the present embodiment, the cushioning materials 19 are arranged laterally at positions orthogonal to the direction connecting the centers of the two tension members 12 with respect to the tape core wire 13, so that the two cushioning materials 19 are arranged in the lateral direction. The space between the cushioning material 19 and the two tape core wires 13 is maintained.

As described above, according to the embodiment of the present invention, even if the sum of the cross-sectional areas of the mounted optical fiber core wires becomes small due to the reduction of the cores of the optical fiber cables and the reduction in the diameter of the optical fiber core wires. The distance between the flat plate-shaped intervening parts is maintained at a substantially predetermined value to the extent that the blade of the dedicated split tool can reach, and the optical fiber core wire is not buried in the cable sheath, making it easy to take out the optical fiber core wire. It becomes possible to provide an optical fiber cable.

1 to 4,103 ... Optical fiber core wire, 5 ... Intermittent tape core wire, 10,100 ... Optical fiber cable, 11,101 ... Cable jacket, 12,102 ... Tension member, 13 ... Tape core wire, 14,104 ... Flat plate-like interposition, 15,105 ... Ripping notch, 16,106 ... Support wire, 17,107 ... Support wire coating, 18,108 ... Connecting part, 19 ... Cushioning material, 20 ... Main body part, 110 ... Dedicated split tool, 111 ... Base member, 112 ... Blade.

Claims (5)

The tape at a position parallel to the tape core wire in which a plurality of optical fiber core wires are arranged, the two tension members arranged on both sides of the tape core wire, and the line segment connecting the two tension members. It is provided with two flat plate-shaped interpositions arranged across a core wire, and the two tension members and the two flat plate-shaped interpositions are integrally covered with a cable jacket so as to have a substantially rectangular shape. An optical fiber cable in which two pairs of tear notches are formed in the longitudinal direction of the cable jacket.
The two flat plate-shaped interpositions have a length exceeding the line segment connecting each of the two pairs of tear notches, and have a cushioning material between the two flat plate-shaped interpositions, and the cushioning material provides the cushioning material. An optical fiber cable in which the distance between the two flat plate-shaped interpositions is maintained at a substantially predetermined value, and the cushioning material is in contact with the tape core wire. The optical fiber cable according to claim 1, wherein the distance between the two flat plate-shaped interpositions is maintained at a substantially predetermined value by the tape core wire and the cushioning material. The optical fiber cable according to claim 1 or 2, wherein the cushioning material is arranged so that the contact angle between the end center of the tape core wire and the cable jacket is 180 ° or less. The first aspect of the present invention, wherein the distance between the two plate-shaped interpositions is maintained at a substantially predetermined value only by the cushioning material, and at least one of the two plate-shaped interpositions is not in contact with the tape core wire. The fiber optic cable described. The optical fiber cable according to any one of claims 1 to 4, wherein the tape core wire is an intermittent tape core wire in which adjacent optical fiber core wires are intermittently connected by a connecting portion and a non-connecting portion. ..

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