JPH08313771A - Single-fiber / multi-fiber optical fiber conversion member and connector - Google Patents

Abstract

(57) [Summary] [Purpose] A single-core multi-core fiber that allows the optical fibers to be arranged at short intervals that are approximately equal to the center intervals of the optical fibers in the multi-fiber tape fiber, while providing the optical fiber with rigidity. An optical fiber conversion member and a connector are provided. [Structure] A plurality of single-core tape-shaped optical fiber core wires 1 are laminated by laminating their respective tape surfaces on the laminated portion 2 side, and are individually separated in a single-core portion 3. The single-core tape-shaped optical fiber core wire 1 is a tape-shaped optical fiber core wire 6 coated with a tape coating 7. The tape coating 7 makes the thickness of the single-core tape-shaped optical fiber core wire 1 substantially equal to the outer diameter of the optical-fiber core wire 6, and the width of the single-core tape-shaped optical fiber core wire 1 is smaller than this thickness. Has been long.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-fiber multi-fiber optical fiber conversion member for connecting a single-fiber optical fiber and a multi-fiber optical fiber to each other, and a single-fiber multi-fiber. The present invention relates to an optical fiber core wire conversion connector.

[0002]

2. Description of the Related Art FIG. 8 is an explanatory view for explaining a conventional single-fiber multi-fiber optical fiber conversion member. In the figure, FIG. 8 (A)
Is a multi-core optical fiber core wire, FIG. 8 (B) is a conventional single-core multi-core optical fiber core wire conversion connector, and FIG. 8 (C) is
It is explanatory drawing explaining the protection method of the single-core optical fiber core wire in the conventional single-core multi-core optical fiber core wire conversion connector.
In the figure, 41 is a multi-core optical fiber core wire, 42 is an optical fiber glass portion, 43 is a protective coating, 44 is an optical fiber core wire, and 45.
Is a tape coating, 46 is a single-core optical fiber core, 47 is a branch protector, 48 is a multi-core connector, 49 is a single-core connector, 5
0 is a reinforcing tube.

In FIG. 8A, a multi-core optical fiber core wire 41 is an optical fiber core having an outer diameter of 250 μm in which a silica glass optical fiber glass portion 42 having an outer diameter of 125 μm is protectively coated. A plurality of lines 44, for example, 4
The structure is such that the books are arranged side by side and covered with a tape coating 45 from the periphery. When pulling such a multi-core optical fiber core wire 41 to a subscriber, the four single-core optical fiber core wires are separated into single-core optical fiber core wires and individually drawn to each subscriber. Must be connected to a fiber optic cable. For that purpose, a single-core multi-core optical fiber core conversion connector is used which converts the multi-core optical fiber core 41 into a plurality of single-core optical fiber cores.

In FIG. 8B, a conventional single-core multi-fiber optical fiber conversion cable connector has a multi-core optical fiber cable 41 similar to the multi-fiber optical fiber cable 41 shown in FIG. 8A.
And a plurality of single-core optical fiber core wires with reinforcing tubes 46
Have. The multi-core optical fiber core wire 41 includes a branch protection unit 47.
In, a plurality of single-core optical fibers with a reinforcing tube are branched into 46. A multi-core connector 48 is provided at the tip of the multi-core optical fiber core wire 41, and a single-core connector 49 is provided at the tip of the single-core optical fiber core wire 46 with each reinforcing tube.
Have. The multi-core connector 48 is coupled to the multi-core connector of the multi-core optical fiber core wire on the aerial optical cable side not shown,
By connecting the single-core connector 49 to the single-core connector of the single-core optical fiber core wire on the subscriber side (not shown), the overhead optical cable side and the subscriber can be connected.

FIG. 8C is an enlarged view of the single-core optical fiber core wire 46 with a reinforcing tube shown in FIG. 8B. The outer diameter of the single-fiber optical fiber 46 with a reinforcing tube is 250 μm.
In order to increase the rigidity of the optical fiber core wire 44 and make it easier to handle, the periphery of the optical fiber core wire 44 is surrounded by the reinforcing tube 50.
Are reinforced with.

The branch protection unit 47 shown in FIG.
Fixing of reinforcing tube 50 and multi-core optical fiber core wire 41
To the single-core optical fiber core wire with a reinforcing tube 46 for protection of the branch portion. In the branch protection part 47, the optical fiber core wire 44 is separated from the multi-core optical fiber core wire 41 for each single core, and the periphery thereof is reinforced by the reinforcing tube 50, and on the case of the branch protection part 47, the multi-core optical fiber is provided. The core wire 41, the optical fiber core wire 44, and the reinforcing tube 50 are integrated with the case by an adhesive or the like.

As described above, in the conventional single-core multi-core optical fiber core wire conversion connector, the multi-core tape fiber 41 is branched into a plurality of optical fiber core wires 44, and the optical fiber core wires 44 are separated.
It was necessary to pass through the reinforcing tube 50 one by one to reinforce and protect the multi-core single-core bifurcation part. The problems with the single-fiber multi-fiber optical fiber conversion connector are:
It is difficult to handle the optical fiber core wire 44 having an outer diameter of 250 μm, which constitutes the conventional multi-core fiber, as a single core.

[0008]

SUMMARY OF THE INVENTION According to the present invention, optical fibers can be arranged at intervals substantially equal to the center intervals of the optical fibers in a multi-core tape fiber, while providing the optical fibers with a handleable rigidity. It is an object of the present invention to provide a single-fiber multi-fiber optical fiber conversion member and a single-fiber multi-fiber optical fiber conversion connector.

[0009]

According to a first aspect of the present invention, in a single-core multi-fiber optical fiber conversion member, a plurality of single-core optical fiber cores and the plurality of single-core optical fibers are provided. The optical fiber core wire has a laminated portion laminated in the thickness direction, the single-core optical fiber core wire is a single-core optical fiber core wire having a protective coating layer around the optical fiber, and the thickness is It has a coating having a width substantially equal to the outer diameter of the optical fiber core and having a width larger than the above thickness.

According to a second aspect of the present invention, in the single-core multi-fiber optical fiber conversion member according to the first aspect,
The coating is a thermoplastic resin.

According to a third aspect of the present invention, in the single-core multi-fiber optical fiber conversion member according to the first aspect,
The coating is an ultraviolet curable resin.

According to a fourth aspect of the present invention, in the single-core multi-fiber optical fiber conversion member according to any one of the first to third aspects, the single-fiber optical fiber includes one or a plurality of linear bodies. The linear bodies have an outer diameter equal to or less than the outer diameter of the optical fiber core and are arranged in the width direction.

According to a fifth aspect of the invention, in the single-core multi-fiber optical fiber conversion member according to the fourth aspect,
The linear body is an organic linear body.

According to a sixth aspect of the invention, in the single-core multi-fiber optical fiber conversion member according to the fifth aspect,
The organic linear body has a Young's modulus of 400 kg / cm ² or more.

According to a seventh aspect of the present invention, in the single-core multi-fiber optical fiber conversion member according to the fourth aspect,
The linear body is an inorganic linear body.

According to an eighth aspect of the present invention, a multi-core connector member is provided at an end of the laminated portion of the single-core multi-fiber optical fiber conversion member according to any one of the first to seventh aspects. However, each end of the single-core optical fiber has a single-core connector member.

[0017]

According to the present invention, the single-core optical fiber core has a plurality of single-core optical fiber cores and a laminated portion in which the plurality of single-core optical fiber cores are laminated in the thickness direction. The wire has a single-core optical fiber core wire having a protective coating layer around the optical fiber, and a coating having a thickness substantially equal to an outer diameter of the optical fiber core wire and having a width larger than the thickness. Therefore, it is possible to arrange the optical fibers at short intervals that are approximately equal to the center intervals of the optical fibers in the multi-core optical fiber core, while providing the optical fiber core with a handleable rigidity.

According to the invention of claim 2, claim 1
In the single-fiber multi-fiber optical fiber conversion member described in (1), since the coating is a thermoplastic resin, it is possible to easily obtain a tape-shaped coating having handleable rigidity.

According to the invention of claim 3, claim 1
In the single-fiber multi-fiber optical fiber conversion member described in (1), since the coating is characterized by being an ultraviolet curable resin, a coating having a handleable rigidity can be easily obtained.

According to the invention of claim 4, claim 1
In the single-core multi-core optical fiber core wire conversion member according to any one of 1 to 3, the single-core optical fiber core wire has one or a plurality of linear bodies, and the linear body has an outer diameter of the optical fiber core wire or less. The coating can be reinforced because it has an outer diameter and is arranged in the width direction.

According to the invention of claim 5, claim 4
In the single-fiber / multi-fiber optical fiber conversion member described in (1), since the linear body is an organic linear body, a reinforced coating can be easily obtained.

According to the invention of claim 6, claim 5
In the single-fiber multi-fiber optical fiber conversion member described in (1), the organic linear body is characterized by having a Young's modulus of 400 kg / cm ² or more. It can be higher.

According to the invention of claim 7, claim 4
In the single-fiber multi-fiber optical fiber conversion member described in (1), since the linear body is an inorganic linear body, a reinforced coating can be easily obtained.

According to the invention of claim 8, claim 1
9. A single-core multi-fiber optical fiber conversion member according to any one of claims 1 to 7 has a multi-fiber connector member at an end of the laminated portion, and a single fiber is provided at each end of the single-fiber optical fiber. Since it has the connector member, the connecting work is easy.

[0025]

1 is an explanatory view of a first embodiment of a single-fiber multi-fiber optical fiber conversion member of the present invention. In the figure, 1 is a single-core tape-shaped optical fiber core wire, 2 is a laminated portion, 3 is a single-core portion, 4
Is a fixing member, 5 is a separation stopper, 6 is an optical fiber core wire, and 7 is a tape coating.

The single-core multi-fiber optical fiber conversion member has a plurality of single-core tape-shaped optical fiber cores 1, and has a laminated portion 2 and a single-core portion 3 so that a part thereof is made multi-core. Has been done. On the laminated portion 2 side, a plurality of single-core tape-shaped optical fiber core wires 1 are laminated by laminating their respective tape surfaces, and are joined by a fixing member 4 so that the laminated bodies are integrated so as not to separate. ing. The laminated portion 2 as a whole constitutes a multi-fiber. In the single-core portion 3, the plurality of single-core tape-shaped optical fiber core wires 1 are individually separated. A separation stopper 5 such as a heat-shrinkable tube is provided at the boundary between the laminated portion 2 and the single-core portion 3 so that the plurality of single-core tape-shaped optical fiber core wires 1 of the laminated portion 2 are not separated.

The single-core tape-shaped optical fiber core wire 1 is a tape-shaped optical fiber core wire 6 coated with a tape 7. Due to the tape coating 7, the thickness of the single-core tape-shaped optical fiber core wire 1 is almost the same as the outer diameter of the optical-fiber core wire 6, and the width of the single-core tape-shaped optical fiber core wire 1 is made larger than this thickness. ing. A plurality of such single-core tape-shaped optical fiber core wires 1 are prepared, their widths are matched, and they are laminated in the thickness direction to form a laminated portion 2. In this laminated portion 2, the pitch of the optical fiber core wires 6 of each single-core tape-shaped optical fiber core wire 1, that is, the optical fiber 10 at the center thereof.
The pitch of the optical fiber core wires 4 in the conventional tape-shaped optical fiber core wire 41 described with reference to FIG. 8A, that is, the pitch of the optical fiber glass portion 42 at the center thereof is made substantially equal. ing.

At the end of the laminated portion 2, a multi-core tape-shaped optical fiber core wire to be connected is fusion-bonded, mechanical splice,
The single-core tape-shaped optical fiber core wire 1 is connected by an optical connector or the like, and the end portion of the single-core tape-shaped optical fiber core wire 1 is also connected to the single-core optical fiber core wire by fusion splicing, mechanical splice, optical connector, or the like.
Since the width of the single-core tape-shaped optical fiber core wire 1 is sufficiently wide as compared with the conventional single-core optical fiber core wire having a circular cross section, the rigidity is improved and the handleability of the optical fiber core wire is improved. are doing.

The above-mentioned fixing member 4 can be formed by applying an ultraviolet curable resin around the single-core tape-shaped optical fiber core wire 1 in the laminated portion 2 and curing it with ultraviolet light. Alternatively, in the laminated portion 2, an adhesive as a fixing member may be applied and bonded to the surface where the single-core tape-shaped optical fiber core wires 1 overlap, or another member may be fitted as the fixing member 4. The separation stopper 5 may also be realized by using an ultraviolet curable resin or an adhesive instead of fixing the laminated body by a method of fitting another member or winding. The fixing member 4 and / or the separation stopper 5 are not necessary when the laminated body of the single-core tape-shaped optical fiber core wires 1 is not likely to be separated.

FIG. 2 is an explanatory view of a second embodiment of the single-fiber multi-fiber optical fiber conversion member of the present invention. In the figure, the same parts as those in FIG. Reference numeral 8 is a single-core tape-shaped optical fiber core wire, and 9 is a linear body. In the single-fiber multi-fiber optical fiber conversion member of this embodiment, the single-fiber tape-shaped optical fiber 8 has the linear bodies 9 arranged on both sides of the single-fiber optical fiber 6 in the longitudinal direction, Tape on 7
Is applied. The linear body 9 preferably has an outer diameter equal to or smaller than the outer diameter of the optical fiber core wire 6. By providing the linear body 9, the optical fiber core wire 6 is reinforced.

FIG. 3 is an explanatory view of the single-core tape-shaped optical fiber core wire in the above-mentioned embodiment. FIG. 3A shows the single-core tape-shaped optical fiber core wire of the first embodiment, and FIG.
(B) shows the single-core tape-shaped optical fiber core wire in the second embodiment. In the figure, the same parts as those in FIG. 1 and FIG. 6a is an optical fiber glass part, and 6b is a protective coating. The optical fiber core wire 6 is composed of an optical fiber glass portion 6a and a protective coating 6b provided around the optical fiber glass portion 6a. In FIG. 3A, the optical fiber core wire 6 is surrounded by a tape coating 7, and in FIG. 3B, the linear bodies 9 are arranged on both sides of the optical fiber core wire 6. From the tape coating 7 is used.
The number of linear bodies 9 may be only one, or may be three or more.

The material of the tape coating 7 of the single-core tape-shaped optical fiber core wire 1 in FIGS. 3 (A) and 3 (B) is nylon, polyethylene (PE), polybutylene terephthalate (PBT), polyethylene terephthalate. (PE
T), polycarbonate (PC), polyvinyl chloride (P
VC) or other thermoplastic resin, or urethane acrylate-based or epoxy acrylate-based UV-curable resin, which is directly coated around the optical fiber core 6 or on the optical fiber core 6 and the linear body 9. Then, the tape coating 7 can be obtained.

By changing the material of the linear body 9, it is possible to obtain the one having desired characteristics with respect to rigidity and tensile strength. Nylon, P
Organic linear materials such as E, PBT, and PET are preferable, and aramid fibers, highly stretched polyethylene, and reinforced thermosetting resin (FR) are used to increase tensile strength and bending rigidity.
P), reinforced thermoplastic resin (FRTP), liquid crystal polymer (LCP), carbon fiber, etc., 400k
It is preferable to use an organic linear body having a Young's modulus of g / mm ² or more. Further, in order to further improve the strength, it is preferable to use an inorganic linear body such as a steel wire or Tyranno fiber.

4 to 6 are explanatory views of the manufacturing process of the single-core tape-shaped optical fiber core wire of the present invention. In the figure,
The same parts as those in FIG.
11 is a feeder, 12 is an extruder, 13 is a die, 1
4 is a sizing device, 15 is a cooling tank, 16 is a winding device,
Reference numerals 17 and 18 are supply devices, 19 is a concentrating roller, 20 is a die, and 21 is an ultraviolet lamp.

FIG. 4 is an explanatory view of the manufacturing process of the single-core tape-shaped optical fiber core wire used in the first embodiment described with reference to FIGS. 1 and 3 (A). A thermoplastic resin was used as the tape covering material. The optical fiber core wire 6 fed from the supply device 11 is supplied to an extruder 12 into which a thermoplastic resin has been fed, coated with a tape coating material, drawn out from a die 13, shaped in a sizing device 14, and cooled in a cooling tank. It is cooled while being passed through 15, and is wound into a winding device 16 as a single-core tape-shaped optical fiber core wire 1. Here, the sizing device 14 is a preferable form used when reducing the thickness of the tape covering material, but it is not always necessary.

FIG. 5 is an explanatory view of the manufacturing process of the single-core tape-shaped optical fiber core wire used in the second embodiment described with reference to FIGS. 2 and 3B. A description will be given of a manufacturing process of a tape coating material using an ultraviolet curable resin. In this case, the same process as for the ordinary tape fiber 1 can be used. The optical fiber core wire 6 delivered from the supply device 11 such as a bobbin and the two linear bodies 9 delivered from the supply devices 17 and 18 are concentrated by the concentrating roller 19 in a predetermined arrangement relationship. Further, the die 20 to which the ultraviolet curable resin has been fed is coated with the ultraviolet curable resin and pulled out, and the ultraviolet lamp 21 cures the ultraviolet curable resin to form a tape coating,
The single-core tape-shaped optical fiber core wire 8 is wound up by a winding device 16 such as a bobbin.

FIG. 6 is an explanatory view of the manufacturing process of the single-core tape-shaped optical fiber core wire used in the second embodiment described with reference to FIGS. 2 and 3B. A thermoplastic resin was used as the tape covering material. The optical fiber core wire 6 delivered from the supply device 11 such as a bobbin and the two linear bodies 9 delivered from the supply devices 17 and 18 are concentrated by the concentrating roller 19 in a predetermined arrangement relationship. Further, the thermoplastic resin fed from the extruder 12 is coated with a die 13, shaped in a sizing device 14, cooled while being passed through a cooling tank 15, and a single-core tape-shaped optical fiber core wire 8 is formed. Then, it is wound up by the winding device 16. Here, the sizing device 14 is a preferable form used when the thickness of the tape covering material is reduced,
Not necessarily required.

A first specific example will be described. Outer diameter 125 μm
The outer diameter of the silica glass around the
The optical fiber core wire 6 is obtained by applying a primary coating with an ultraviolet curable resin so as to have a thickness of 0 μm. By coating a coating of polybutylene terephthalate (PBT) around the optical fiber core wire 6, the cross-section has a thickness of 270 μm and a width of 800 μm.
m single-core tape-shaped optical fiber core wire 1 was obtained. When the outer diameter of the fiber core is about 250 μm and the thickness is about 270 μm and the width is 500 μm or more, the function can be achieved.

A second specific example will be shown. The above-mentioned optical fiber core wire 6 and polyethylene terephthalate (PET) having a diameter substantially the same as that of the optical fiber core wire 6 are arranged as one linear body on each side of the optical fiber core wire 6, and at the same time, polybutylene terephthalate (PBT) or urethane is used. A tape coating 7 of an acrylate-based UV-curable resin was covered to obtain a single-core tape-shaped optical fiber core wire 8 having a sectional thickness of 270 μm and a width of 800 μm. In the single-core tape-shaped optical fiber core wire 8 thus manufactured, the linear body 9 is relatively soft, so the tape coating 7 is relatively easy.
Can be removed, and the glass portion of the optical fiber core wire 6 can be taken out.

A third specific example will be shown. 400 kg as the above-mentioned optical fiber core wire 6 and the linear body 9 having almost the same diameter
/ Cm ² is a type of organic linear body having a high Young's modulus,
One bundle of aramid fibers or one solidified with another resin is arranged on each side of the optical fiber core wire 6, and at the same time, polybutylene terephthalate (PBT) or urethane acrylate UV curable resin Was covered with a tape coating 7 to obtain a single-core tape-shaped optical fiber core wire 8 having a sectional thickness of 270 μm and a width of 800 μm.

The characteristics, reliability and handleability of each of the above-mentioned specific examples were good. The third specific example can be used for applications requiring high tensile strength, but the linear body 9 is hard and the linear body 9 and the tape coating 7 cannot be removed at the same time. However, the optical fiber core wire 6 can be taken out from the tape coating 7 by pulling the two linear bodies 9 to both sides.

In the single-core multi-fiber optical fiber conversion member described in the above-mentioned embodiment, it is conventionally known to optically couple the end portion on the laminated portion 2 side to the multi-fiber tape-shaped optical fiber. A method using an optical connector, a method using mechanical splicing, a method of fusion splicing, or the like can be used. In addition, the single-core tape-shaped optical fiber core wire 1 on the single-core portion 3 side
The same method can be used as a specific method for optically coupling the ends of the optical fibers to the single-core tape-shaped optical fiber cores.

To optically couple a single-core optical fiber core to the end on the side of the single-core tape-shaped optical fiber core 1,
A method using an optical connector, a method using mechanical splicing, a method of fusion splicing, or the like can be used. In order to optically couple a single-core optical fiber core wire to the single-core tape optical fiber core wire by fusion splicing, at the end of the single-core tape optical fiber core wire 1, the tape coating, the linear body 9, and the protection are provided. The coating is removed to expose the optical fiber glass portion, and the end surface is butt-fused with the end surface of the optical fiber glass portion of the other side to be optically coupled. A portion between the fusion-bonded portions, which has the coating of both single-core tape-shaped optical fibers, is reinforced by covering it with a heat-shrinkable tube or the like. When the linear body 9 extends beyond the fusion-bonded portion to the covering portion on the other side and the above-mentioned reinforcement is performed, the fusion-bonded portion can be reinforced by the linear body 9.

FIG. 7 is an explanatory view for explaining an example of a single-fiber multi-fiber optical fiber conversion connector, FIG. 7 (A) shows a multi-fiber optical connector pair, and FIG. 2 is a cross-sectional view of a multi-core connector member on the side of a multi-core optical fiber conversion cable connector. In the figure, the same parts as those in FIG. 8 and FIG. 31 and 32 are multi-core connector members, 31a is a grip portion, 31b is a joint portion, 31c is a joint surface, 31d is a guide hole, 31e is an insertion hole, 32 is a multi-fiber connector member on the multi-fiber ribbon side, and 32a is 32a. A grip portion, 32b is a joint portion, 32c is a joint surface, and 32d is a guide pin.

A multi-core connector member is provided at the tip of the plurality of single-core tape-shaped optical fiber core wires 1 in the laminated portion 2 of the single-core multi-core optical fiber core wire converting members described in FIGS.
By providing a single-core connector member at each of the distal ends of the single-core tape-shaped optical fiber core wires 1 in the single-core part 3,
It is possible to form a single-fiber multi-fiber optical fiber conversion cable connector having optical connectors at both ends.

The multi-fiber connector member 31 on the single-fiber multi-fiber optical fiber conversion connector side has a substantially rectangular cross section, and has a grip portion 31a having a relatively large cross-sectional area and a joint portion 31b having a small cross-sectional area. , There is a step at the boundary between the two. Junction 3
The end of 1b is a joint surface 31c, and has a guide hole 31d and an insertion hole 31e. Insertion hole 31e having a step
1, the optical fiber core wire 6 shown in FIG. 1 and FIG. 2 and the optical fiber glass portion from which the protective coating on the end portion is removed are inserted, and the tip portion of the optical fiber glass portion is , Facing the joint surface 31c, and mirror-finished together with the joint surface 31c.

From the other end of the grip portion 31a, a plurality of single-core tape-shaped optical fiber core wires 1 are taken out in such a manner that they are separated from the laminated state, and the tips of these are shown in FIG. An unillustrated single-core optical connector having substantially the same shape as the conventional single-core connector 49 is provided. For example, a subscriber-side single-core optical cable is connected to the single-core optical connector.

In the same way, the multi-core connector member 32 to be joined to the single-core multi-fiber optical fiber conversion connector is also inserted with the multi-fiber tape-shaped optical fiber. Junction 32b
The end portion of is a joint surface 32c and has a guide pin 32d. This multi-core tape-shaped optical fiber core wire is drawn out from an overhead optical cable, for example.

To join the single-fiber multi-fiber optical fiber conversion connector and the multi-fiber connector on the multi-fiber tape 1 side, a guide pin 32d is fitted in the guide hole 31d and the joining surfaces 31c and 32c are joined together. , Optically couple each other's optical fibers. Then, both are gripped and fixed by a member (not shown) that holds the grips 31a and 32a from the left and right.

With reference to FIG. 7 (B), the terminal processing of the multi-fiber side of the single-fiber multi-fiber optical fiber conversion connector is shown. At the end portions of the plurality of laminated single-core tape-shaped optical fiber core wires 1, the tape coating 7, the linear body 9, and the primary coating are removed over a predetermined length, and a plurality of optical fiber glass portions are taken out. The joint surface 31c is made to pass through an insertion hole 31e provided in the joint portion 31b, and mirror-finished at the joint surface 31c.

In the method described with reference to FIG. 7, both the laminated portion 2 side and the single core portion 3 side of the single-core multi-fiber optical fiber converting member are optically coupled with the mating optical fiber by the connector member. ing. However, different optical coupling methods may be adopted in each case. On the single-core portion 3 side, different optical coupling methods may be adopted depending on the connection destination of each single-core tape-shaped optical fiber core wire 1.

It should be noted that the single-core tape-shaped optical fiber core wire 1 itself is not used as a single-core multi-core optical fiber core wire conversion member.
Even when used alone, it is in tape form and
The structure described with reference to (B) is suitable for installation on a flat wall surface at the subscriber's house by using it as a drop-off optical cable or an indoor optical cable because of the structural feature that it is further reinforced. .

[0053]

As is apparent from the above description, according to the present invention, the optical fiber core wire in the separating portion of the single-core multi-core optical fiber core wire converting member can be safely used as a single-core tape-shaped optical fiber core wire. Not only can it be handled, but the optical fiber at the center of the optical fiber core of the laminated part of the single-core multi-fiber optical fiber conversion member can be replaced with the optical fiber at the center of the ordinary tape-shaped optical fiber. Can be arranged at the same pitch.
Therefore, there is an effect that the single-core multi-core optical fiber core wire conversion member and the single-core multi-fiber optical fiber core wire conversion connector for converting the number of cores can be configured with good handleability and at low cost.

[Brief description of drawings]

FIG. 1 is an explanatory view of a first embodiment of a single-fiber multi-fiber optical fiber conversion member of the present invention.

FIG. 2 is an explanatory view of a second embodiment of the single-core multi-core optical fiber core wire conversion member of the present invention.

FIG. 3 is an explanatory diagram of a single-core tape-shaped optical fiber core wire in the above-described embodiment.

FIG. 4 is an explanatory diagram of a manufacturing process of the single-core tape-shaped optical fiber core wire used in the first embodiment.

FIG. 5 is an explanatory diagram of a manufacturing process of the single-core tape-shaped optical fiber core wire used in the second embodiment.

FIG. 6 is an explanatory view of a manufacturing process of the single-core tape-shaped optical fiber core wire of the present invention.

FIG. 7 is an explanatory diagram illustrating an example of a single-core multi-core optical fiber core wire conversion connector.

FIG. 8 is an explanatory diagram illustrating a conventional single-fiber multi-fiber optical fiber conversion member.

[Explanation of symbols]

1, 8 ... Single-core tape-shaped optical fiber core wire, 2 ... Laminated portion, 3
... single-core part, 4 ... fixing member, 5 ... separation stopper, 6 ... optical fiber core wire, 6a ... optical fiber glass part, 6b ... protective coating,
7 ... Tape coating, 9 ... Linear body, 12 ... Extruder, 13
… Dice, 14… Sizing device, 15… Cooling tank, 19
… Concentration roller, 20… Dice, 21… UV lamp, 3
1, 32 multi-core connector member, 41 ... multi-core optical fiber core wire, 42 ... optical fiber glass part, 46 ... single-core optical fiber core wire with reinforcing tube.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shinji Nagasawa 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (8)

[Claims] 1. A plurality of single-core optical fiber core wires and a laminated portion in which the plurality of single-core optical fiber core wires are laminated in a thickness direction, wherein the single-core optical fiber core wire surrounds an optical fiber. A single-core optical fiber having a protective coating layer on the inner surface thereof, and a single-core multi-fiber optical fiber having a thickness substantially equal to an outer diameter of the optical fiber and having a width larger than the thickness. Core conversion member. 2. The single-core multi-fiber optical fiber conversion member according to claim 1, wherein the coating is a thermoplastic resin. 3. The single-core multi-fiber optical fiber conversion member according to claim 1, wherein the coating is an ultraviolet curable resin. 4. The single-core optical fiber core wire has one or a plurality of linear bodies, and the linear body has an outer diameter equal to or smaller than an outer diameter of the optical fiber core wire, and the width direction. 4. The single-core multi-fiber optical fiber conversion member according to claim 1, wherein the single-fiber multi-fiber optical fiber conversion member is arranged. 5. The single-fiber / multi-fiber optical fiber conversion member according to claim 4, wherein the linear body is an organic linear body. 6. The organic linear material is 400 kg / cm.
The single-core multi-fiber optical fiber conversion member according to claim 5, which has a Young's modulus of ² or more. 7. The single-core multi-fiber optical fiber conversion member according to claim 4, wherein the linear body is an inorganic linear body. 8. A single-core optical fiber core wire comprising a single-core optical fiber core wire conversion member according to claim 1 having a multi-core connector member at an end of the laminated portion. A single-core multi-fiber optical fiber conversion connector, which has a single-core connector member at each end thereof.