JPH1172666A - Optical fiber cable and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To well maintain the lamination state of coated optical fibers by housing laminates laminated with the plural coated optical fibers into the slot grooves of slots and winding filamentous bodies around the circumferences of the laminates over the longitudinal direction thereof. SOLUTION: The self-supporting type optical fiber cable consists of a structure obtd. by integrating a supporting wire 11 and an optical fiber cable 13 by a connecting part 13. This optical fiber cable 13 is provided with the S-Z slots 18 having the slot grooves 21 formed to an S-Z twist shape. Bunching yarn B which is the filamentous body is wound around the circumferences of the laminates 23 housed in the slot grooves 21 over the longitudinal direction of the laminates 23. The bunching yarn B well maintains the lamination state of the coated optical fiber ribbons 22 constituting the laminates 23. General-purpose nylon yarn, polyester filament, cotton yarn, etc., are adequately used as the bunching yarn B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber cable in which a plurality of optical fiber ribbons are accommodated in a slot groove of a slot, and a method of manufacturing the same. The present invention relates to an optical fiber cable that can be kept well and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, a slot type optical fiber cable in which a plurality of optical fiber ribbons are accommodated in a slot groove has been widely used, and an SZ slot type optical fiber cable has been used. Things are known. What is an SZ slot type optical fiber cable?
The slot groove uses a slot formed in an SZ twist that alternately repeats the S twist and the Z twist, and the operability when branching the optical fiber core housed in the slot groove is improved. It is excellent.

FIGS. 8 to 10 show an example of a self-supporting type optical fiber cable using this type of SZ slot type optical fiber cable. FIG. 8 is a sectional view, and FIG. 9 shows the structure of the SZ slot. FIG. This self-supporting type optical fiber cable has a structure in which a supporting wire 11 and an SZ slot type optical fiber cable 33 are integrated by a connecting portion 12. The support wire 11 includes a support wire main body 14 made of a galvanized steel twisted wire or the like and the support wire main body 1.
4 and a cover 15 made of a synthetic resin such as polyethylene. The connecting portion 12 is a support wire 1
1 and the optical fiber cable 13 are connected and integrated, whereby the optical fiber cable 13 is hung on the support wire 11, and is continuous from the bottom of the support wire 11 and extends to the top of the optical fiber cable 13. It is a wall-shaped member having a certain thickness, and is made of a synthetic resin such as polyethylene.

[0004] The optical fiber cable 33 comprises a cable core 16 and a sheath 17 made of a synthetic resin such as polyethylene which covers the cable core 16.
The cable core 16 has a structure in which a presser winding 19 is provided on an SZ slot 18 having an outer diameter of 5 to 30 mm. The slot 18 has a tensile strength wire 20 at the center thereof.
The outer periphery has a plurality of, for example, 3 to 20 slot grooves 21 along the longitudinal direction.

[0007] As shown in FIG. 9, the slot groove 21 is formed to have an SZ twist shape. here,
The portion represented by the broken line TT which is twisted from the S twist to the Z twist (or from the Z twist to the S twist) is called an inversion portion, and an intermediate point from the inversion portion to the inversion portion represented by the dashed line RR is a rotation portion. Call.

In the slot groove 21, a laminated body 23 in which about 2 to 10 optical fiber ribbons 22 such as 4 to 16 cores are laminated is accommodated. The width of the slot groove 21 is larger than the width of the optical fiber ribbon 22 to be accommodated therein, for example, the maximum width of the laminate 23, that is, FIG.
With respect to the diameter of the circumscribed circle 23a of the laminate 23 shown in FIG.
It is formed to have a width of up to twice.

FIG. 10 is a model diagram showing a state in which the optical fiber ribbon 22 is accommodated in the slot groove 21 in the SZ slot type optical fiber cable 33. The state of the optical fiber ribbon 22 that changes in the cable length direction from the part (T) to the other reversing part (T) through the rotating part (R) is shown in a cross-sectional view. is there.

In the rotating portion (R), the optical fiber ribbon 22 is arranged so that its width direction (the direction of arrangement of the optical fiber wires) is substantially orthogonal to the center line C of the slot groove 21. The optical fiber ribbon 22 is defined from the width direction of the optical fiber ribbon 22 in the rotating portion (R) to the optical fiber ribbon from the inversion portion (T) to another inversion portion (T). The wire 22 is twisted so that the width direction of the optical fiber tape core wire 22 in the rotating portion (R) is always substantially parallel to the width direction of the optical fiber ribbon 22, and is accommodated in the slot groove 21 while maintaining the laminated state. (This state is said to be assembled with twisting). Also,
FIG. 10 shows the state of one slot groove 21, but the optical fiber ribbons 22 accommodated in the other slot grooves 21 are in the same state.

As described above, in the SZ slot type optical fiber cable 33, since the optical fiber ribbon 22 is housed in the slot groove 21 with the twist, the lamination with respect to the slot groove 21 is performed. The relative position of the body 23 changes in the longitudinal direction of the cable. The reason why the width of the slot groove 21 is formed to be larger than the maximum width of the laminated body 23 as described above is to allow a change in the position of the laminated body 23 in the slot groove 21 along the cable longitudinal direction. . An SZ slot type optical fiber cable having such a structure is disclosed in Japanese Patent Application No. 8-320334 filed by the present applicant.

In the SZ slot type optical fiber cable 33 having the above-described structure, since the slot groove 21 is formed in an SZ twisted shape, the optical fiber ribbon 22 of the inverted portion (T) of the slot groove 21 is removed from the slot groove 21. By taking it out, the post-branching operation can be easily performed. Further, since the optical fiber ribbon 22 is accommodated in the slot groove 21 so that its width direction is always substantially parallel to the width direction of the optical fiber ribbon 22 in the rotating part (R), Even in a situation where a stress is applied to the optical fiber ribbon 22 such as a cable rewind or a heat cycle, the stress does not concentrate locally, and the transmission characteristics are hardly deteriorated.

In the SZ slot type optical fiber cable, since the slot groove is formed in an SZ twisted shape,
Even when the optical fiber ribbon is not twisted as described above, the relative position between the optical fiber ribbon and the slot groove tends to change along the longitudinal direction.
Therefore, it is preferable that the width of the slot groove is formed to be slightly larger than the maximum width of the stacked body 23 as compared with the one having the one-way twisted slot groove.

[0012]

In the optical fiber cable 33 having the above-described structure, the width of the slot groove 21 is large, so that the optical fiber ribbon 22 is easily moved in the slot groove 21. Therefore, when an external force is applied to the cable, for example, when the cable is wound around a drum or the like, an external force is applied to the optical fiber ribbon 22 in the slot groove 21, the lamination state is broken. There was a fear. Optical fiber ribbon 22
When the lamination state of the cable breaks, stress is locally concentrated on the optical fiber ribbon 22 during cable rewinding, heat cycling, and the like, and as a result, transmission characteristics may be likely to deteriorate.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an optical fiber cable capable of maintaining a good laminated state of an optical fiber ribbon and a method of manufacturing the same.

[0014]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-layered optical fiber ribbon laminated in a slot groove of a slot, and a wire around the laminated body extending in the longitudinal direction. The problem is solved by a fiber optic cable wound around the body. In this optical fiber cable, the slot groove may be formed in an SZ twisted shape. In this case, the slot groove is inverted based on the width direction of the optical fiber ribbon at the rotating portion of the slot groove. The optical fiber ribbon is twisted so that the width direction of the optical fiber ribbon from the section to the other inversion section is always substantially parallel to the width direction of the optical fiber ribbon in the rotating section. It is preferable that it is accommodated in the slot groove while being carried out. The method for manufacturing an optical fiber cable according to the present invention is a method for manufacturing an optical fiber cable in which a plurality of optical fiber tape cores are housed in a slot groove of a slot by using a wire wrapping means. The strip winding means includes a tubular body around which a filament can be wound, and an optical fiber tape core insertion hole having a shape along a cross-sectional shape of the laminate in which the plurality of optical fiber tapes are stacked. A plurality of optical fiber ribbons, the optical fiber tape core wire insertion hole of the laminated member of the filament winding means, and a tubular body on which the filament is wound on the outer periphery in advance. In a state where a part of the striated body is fixed to the optical fiber tape, the optical fibers are taken out, the optical fibers are laminated, and the striated body is laminated. Tape of cord Characterized by sequentially receiving the optical fiber ribbon in the slot in the slot grooves while wrapped circumference. Further, the method of manufacturing an optical fiber cable according to the present invention is a method of manufacturing an optical fiber cable, wherein a plurality of optical fiber tape cores are accommodated in a slot groove of an SZ slot by using a striatum winding means and a core position adjusting rotary plate. The method of manufacturing, wherein the wire wrapping means,
A cylindrical member capable of winding a striated body around the outer periphery, and a laminated member having an optical fiber tape core wire insertion hole shaped along a cross section of a laminated body in which a plurality of optical fiber tape cores are stacked. The core position adjusting rotary plate has an opening serving as a slot insertion portion in the vicinity of the center, and on the peripheral side from the opening,
It has a positioning member rotatable with respect to the rotary plate, and the positioning member has an optical fiber tape core wire insertion hole, and the SZ slot is inserted into the opening of the core position adjusting rotary plate. At the same time, a plurality of optical fiber tape core wires are sequentially inserted through the optical fiber tape core wire insertion holes of the laminated member of the wire body winding means and the cylindrical body having the wire body wound on the outer periphery in advance. With a part of the body fixed to the optical fiber tape core wire, insert these optical fiber tape core wires into the optical fiber tape core wire insertion holes of the positioning member of the core wire position adjusting rotary plate, and then attach the core position adjusting rotary plate. While rotating and positioning the optical fiber ribbon in a predetermined position, the optical fiber ribbon is always substantially parallel to the width direction of the optical fiber ribbon at the rotating portion of the slot groove. Twist to become Then, the optical fiber ribbon and the SZ slot are taken out, the optical fiber ribbon is laminated, and the optical fiber tape is wound around the laminated optical fiber ribbon while the wire is wound around the slot. They may be sequentially accommodated in the grooves.

[0015]

FIG. 1 shows a self-supporting type optical fiber cable using an example of the optical fiber cable of the present invention. In the following description, the same parts as those of the conventional example shown in FIGS. 8 to 10 are denoted by the same reference numerals, and the description thereof will be omitted or simplified. This self-supporting type optical fiber cable has a structure in which a supporting wire 11 and an optical fiber cable 13 of this example are integrated by a connecting portion 12.

The optical fiber cable 13 shown here is
It is provided with an SZ slot 18 having a slot groove 21 formed in a Z-twist shape, and a bunching yarn B, which is a linear body, is wound around a laminate 23 accommodated in the slot groove 21. It is different from the conventional SZ slot type optical fiber cable 33 shown in FIGS. 8 to 10 in that it is wound in the direction. The bunching yarn B is for keeping the lamination state of the optical fiber ribbons 22 constituting the laminate 23 in good condition, and as the bunching yarn B, general-purpose nylon yarn, polyester filament, cotton yarn, or the like is used. It is suitable.

Next, a method of manufacturing a self-supporting type optical fiber cable having the SZ slot type optical fiber cable 13 having the above configuration will be described. FIG. 2 to FIG.
2 shows a main part of a manufacturing apparatus used for manufacturing the self-supporting optical fiber cable. The manufacturing apparatus shown here includes a housing die 1, first and second core position adjusting rotary plates 2 and 3, a slot phase detecting eye plate 4,
And a bunching yarn winding machine 7 serving as a filament winding means.

The accommodation die 1 is for accommodating the above-mentioned optical fiber ribbon in the slot groove, and is a cylindrical body having a minimum inner diameter substantially equal to the outer diameter of the slot.

The first core position adjusting rotary plate 2 is used to arrange the optical fiber tape core in a position where it can be easily accommodated in the slot groove, and is formed in a disk shape having an outer diameter of about 20 to 100 mm. , And are rotatably supported in the circumferential direction. An opening 2 serving as a slot insertion portion is provided near the center of the rotating plate 2.
b are formed, and a plurality of optical fiber insertion holes 2a are provided at positions on the peripheral side from the opening 2b. The number of the insertion holes 2 a is equal to the number of the slot grooves in the circumferential direction of the rotating plate 2.

A plurality of positioning members 5 are provided on the surface of the rotating plate 2 opposite to the side of the housing die 1 so as to cover the insertion holes 2a. These positioning members 5 are formed by laminating a plurality of optical fiber ribbons, and
It is formed in a disk shape with an outer diameter of about 2 to 10 mm, and is provided rotatably in the circumferential direction of the rotating plate 2 in its own circumferential direction. The positioning member 5 is provided with an optical fiber core insertion hole 5a for inserting an optical fiber tape core, and the insertion hole 5a is provided with a plurality of stacked optical fiber tape cores 22 (laminated body). 23) It is formed in a rectangular shape along the cross section. The insertion hole 5a of the positioning member 5 is preferably formed at a position where the distance a from the outer peripheral surface of the slot shown in FIG. 4 to the center of the insertion hole 5a is about 1 to 5 mm.

The rotating plate 2 is moved from a position for accommodating the optical fiber ribbon in the slot groove (hereinafter, referred to as a core receiving position).
, That is, the distance from the core wire accommodating position to the positioning member 5 (the distance s shown in FIG. 2) is set to about 5 to 50 mm.

The second core position adjusting rotary plate 3 is provided for arranging the optical fiber ribbon in a position easily accommodated in the slot groove, and for maintaining the twisted state of the optical fiber ribbon 22 in a good condition. And is formed in a disk shape having an outer diameter of about 50 to 200 mm, and is supported so as to be rotatable in the circumferential direction. The rotary plate 3 is provided with an opening 3b serving as a slot insertion portion near the center, and a plurality of optical fiber core insertion holes 3a at a position on the peripheral side of the opening 3b. The number of the insertion holes 3 a is equal to the number of the slot grooves in the circumferential direction of the rotating plate 3.

A plurality of positioning members 6 are provided on the surface of the rotating plate 3 opposite to the housing die 1 so as to cover the insertion holes 3a. The positioning member 6 is for maintaining the twisted state of the optical fiber ribbon 22 in a good state, and is formed in a disk shape having an outer diameter of about 2 to 10 mm. , And can be rotated at an arbitrary speed and direction by a drive source (not shown). The positioning member 6 is provided with an optical fiber insertion hole 6 a, and the insertion hole 6 a is formed in a rectangular shape along the cross section of the laminated body 23. Rotating plate 3
, That is, the distance from the core wire accommodating position to the positioning member 6 (the distance 1 shown in FIG. 2) is set to about 30 to 300 mm. The insertion hole 6a of the positioning member 6 is preferably formed at a position where the distance b from the outer peripheral surface of the slot to the center of the insertion hole 6a shown in FIG. 5 is about 5 to 50 mm.

The rotating plate 3 is provided with a phase adjuster (not shown), which can be used to adjust the phase of the rotating plate 3 to an arbitrary position.

The slot phase detecting eye plate 4 is for detecting the phase of the slot groove of the SZ slot, is formed in a disk shape, and is supported rotatably in the circumferential direction. Eyeboard 4
An opening 4b serving as a slot insertion portion is formed near the center of the opening 4b, and a phase detection projection 4a that fits into the slot groove when the slot is inserted into the opening 4b is provided on the inner edge of the opening 4b. The eye plate 4 is adapted to rotate in accordance with the slot groove phase.

The slot phase detecting eye plate 4 is provided with a phase detector (not shown) for detecting the phase of the eye plate 4, and the phase detector is used to detect the portion located in the opening 4b. The phase of the slot groove of the slot can be detected. The distance between the slot phase detection eye plate 4 and the core wire accommodating position in the accommodating die 1 is a distance from the inverted portion (T) of the slot groove 21 to another inverted portion (T) adjacent thereto, Alternatively, the phase of the slot groove 21 detected by the slot phase detecting eye plate 4 is equal to the phase of the slot groove 21 at the core wire accommodating position. This phase detector is connected to a phase adjuster provided on the rotary plate 3 and can arbitrarily set the phase of the rotary plate 3 in accordance with the phase of the slot groove detected by the phase detector. It has become.

The bunching yarn winding machine 7 stacks a plurality of optical fiber ribbons 22, winds a bunching yarn B or the like around the outer periphery of the laminated body 23, and keeps the laminated state of the laminated body 23 good. A cylindrical member 8 and a laminated member 9 provided at one end thereof. The cylindrical body 8 has openings at both ends and the inside is an optical fiber tape core insertion portion, and a bunching thread B made of nylon yarn or the like is wound around the outer periphery thereof.
The wrapping diameter of the bunching yarn B is preferably set to 6 cm or less.

The laminating member 9 is used for laminating the optical fiber ribbons. The laminating member 9 is provided with an optical fiber insertion hole 9a for inserting the optical fiber ribbon. This insertion hole 9a is
3 is formed in a rectangular shape along the cross section.

Next, taking the case where the above-mentioned apparatus is used as an example,
An example of the method for manufacturing the optical fiber cable of the present invention will be described. First, the SZ slot 18 is passed through the openings of the housing die 1, the first and second core wire position adjusting rotary plates 2, 3, and the slot phase detecting plate 4 in order, as shown in FIG.
Take off at a constant speed in the direction of the middle arrow. At this time, the phase detection projection 4a of the slot phase detection eye 4 is disposed in the slot groove 21.

At the same time, a plurality of, preferably 2 to 10 optical fiber ribbons 22 are provided per slot groove.
Through the insertion holes 9a of the laminated member 9 of the bunching yarn winding machine 7,
And a cylindrical body 8 previously wound with a bunching yarn B around its outer periphery.
And the optical fiber ribbons 22 are fixed to one end of the bunching thread B. Next, these optical fiber tape cores 22 are connected to the second core position adjusting rotary plate 3.
After passing through the insertion hole 6a of the positioning member 6 and the insertion hole 5a of the positioning member 5 of the first core wire position adjusting rotary plate 2, the guide is guided into the housing die 1, where it is inserted into the slot groove 21 of the slot 18. In the state where it is positioned, it is picked up at the above constant speed in the direction of the arrow in the figure.

At this time, when the optical fiber ribbon 22 passes through the insertion hole 9 a of the laminated member 9, the optical fiber ribbon 22 is laminated and passes through the inside of the cylindrical body 8. In the process in which the optical fiber ribbon 22 passing through the cylindrical body 8 reaches the rotary plate 3 from the cylindrical body 8, the bunching yarn B on the cylindrical body 8 of the bunching yarn winding machine 7 is sequentially fed out, and the optical fiber tape core 22 is Wrapped around. In this manner, the optical fiber ribbons 22 in a state in which the bunching yarn B is wound around the laminated members are arranged in a state where the laminated state is not collapsed and the positioning members 6 of the second core position adjusting rotary plate 3 are arranged. Of the SZ slot 18 through the insertion hole 6a of the first core wire position adjusting rotary plate 2 and the insertion hole 5a of the positioning member 5 of the first core line position adjusting rotary plate 2.

In the process of drawing the slot 18 and the optical fiber ribbon 22 as described above, a portion of the slot 1 located in the opening 4b of the slot
The phase of the eight slot grooves 21 changes. Here, since the phase detection projection 4a is arranged in the slot groove 21, the slot phase detection eye 4 rotates in the circumferential direction as the slot 18 is taken out, and the slot groove 21 in the opening 4b is removed. The phase is detected by a phase detector. As described above, the slot groove 21 in the slot phase detection
Is equal to the phase of the slot groove 21 at the core wire accommodating position in the accommodating die 1, so that the detector can know the phase of the slot groove 21 at the core wire accommodating position.

At this time, the rotating plate 3 is adjusted in accordance with the phase of the slot groove 21 at the core wire accommodating position detected by the phase detector.
The rotary plate 3 is rotated by driving the phase adjuster provided at the predetermined position, for example, the insertion hole 6a of the positioning member 6 is arranged on the extension line in the tangential direction of the slot groove 21 at the core wire accommodating position. To be done. Further, the rotating plate 2 may be rotated so that the phase of the insertion hole 5a of the positioning member 5 becomes substantially equal to the phase of the slot groove 21 at the core wire accommodating position.

At the same time, the positioning member 6 provided on the rotating plate 3 is forcibly rotated with respect to the rotating plate 3 by a driving source (not shown) so that the width direction of the optical fiber ribbon 22 is changed.
The optical fiber ribbon 22 is always substantially parallel to the width direction of the optical fiber ribbon 22 in the rotating portion (R) of the slot groove 21. As a result, the optical fiber ribbon 22 is forcedly twisted and accommodated in the slot groove 21.

At this time, since the laminated body 23 is formed by laminating a plurality of optical fiber ribbons 22, it is hard to bend in both the width direction and the thickness direction and is hard to twist. For this reason,
When the rotating plate 2 rotates, stress is applied to the laminated body 23 by the positioning member 5 in a direction of twisting the laminated body 23, but the positioning member 5 moves in its circumferential direction according to a phase change of the rotating plate 2. It turns and the width direction of the laminated body 23 is always kept constant. For this reason, the laminated body 23 is not twisted, and the width direction of the laminated body 23 is always substantially parallel to the width direction of the optical fiber ribbon 22 in the rotating portion of the slot groove 21. The body 23 is accommodated in the slot groove 21 with a twist.

Next, after a coarse winding made of nylon yarn or the like is applied on the slot 18, a holding winding 19 made of a non-woven fabric or the like is applied to produce a cable core 16, and the cable core 16 and the support wire main body 14 are made of polyethylene. The optical fiber cable 13 is collectively covered with a resin such as
To obtain a self-supporting optical fiber cable having

In the optical fiber cable 13 having the above-described structure, a plurality of optical fiber ribbons 22 accommodated in the slot grooves 21 are laminated, and a bunching yarn B is wound around the periphery thereof in the longitudinal direction. Since it was done,
Even when the width of the slot groove 21 is larger than the width of the optical fiber ribbon 22, it is difficult for the lamination state of the optical fiber ribbon 22 to be disturbed, and deterioration of transmission characteristics due to the disturbance is unlikely to occur. Become. Further, by forming the slot groove in an SZ twist shape, the post-branching property is excellent.

If the slot groove 21 is formed in an SZ twisted shape, the optical fiber
In a state where there is a twist, transmission characteristic degradation is less likely to occur.

Further, in the above-mentioned method for manufacturing an optical fiber cable, a plurality of optical fiber ribbons 22 are laminated, a bunching yarn B is wound therearound, and the optical fiber tape core 22 with the bunching yarn B wound therearound. Such as accommodating in the slot groove 21 of the slot 18 can be performed by one production line. Therefore, the cable can be efficiently manufactured.

Although the optical fiber cable of the above example has a slot in which the slot groove is formed in an SZ twisted shape, the optical fiber cable of the present invention is not limited to this. A shape other than the shape, for example, a shape having a slot groove formed in a unidirectional twist shape may be used.

[0041]

According to the optical fiber cable of the present invention, a laminated structure in which a plurality of optical fiber tape cores are laminated is provided with a slot groove in a state where a filament is wound around the laminate in the longitudinal direction. Since the optical fiber tape is housed inside the optical fiber tape, the lamination state of the optical fiber ribbon is hardly disturbed, and the transmission characteristic deterioration due to the disorder of the lamination state is hard to occur. In the case where the slot groove is formed in an SZ twisted shape, the deterioration of the transmission characteristics is less likely to occur by setting the optical fiber ribbon to the twisted state.

In the method of manufacturing an optical fiber cable according to the present invention, a plurality of optical fiber ribbons are laminated, a filament is wound around the core, and the optical fiber ribbon is wound around the filament. And the like can be performed in one manufacturing line. Therefore,
The cable can be efficiently manufactured.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view illustrating an example of an optical fiber cable of the present invention. (B) It is a perspective view which shows the optical fiber tape core wire of the optical fiber cable shown to (A).

FIG. 2 is a schematic configuration diagram showing a main part of a manufacturing apparatus used to carry out an example of the method for manufacturing an optical fiber cable of the present invention.

FIG. 3 is a plan view showing a storage die of the manufacturing apparatus shown in FIG.

FIG. 4A is a plan view showing a first core position adjusting rotary plate of the manufacturing apparatus shown in FIG. 2; (B) It is a top view which shows the positioning member of the 1st core wire position adjustment rotary plate shown to (A).

FIG. 5 is a plan view showing a second core line position adjusting rotary plate of the manufacturing apparatus shown in FIG. 2;

FIG. 6 is a plan view showing a slot phase detection plate of the manufacturing apparatus shown in FIG. 2;

FIG. 7A is a plan view showing a bunching yarn winding machine of the manufacturing apparatus shown in FIG. 2; (B) It is a top view which shows the laminated member of the bunching yarn winding machine shown to (A).

FIG. 8A is a cross-sectional view illustrating an example of a self-supporting optical fiber cable using a conventional optical fiber cable. (B) It is a principal part enlarged view of the self-supporting type optical fiber cable shown to (A).

FIG. 9 is a plan view showing a structure of a slot of the optical fiber cable shown in FIG.

FIG. 10 is a model diagram showing an accommodated state of an optical fiber ribbon in the optical fiber cable shown in FIG. 8;

[Explanation of symbols]

2, 3, ... core position adjusting rotary plate, 5, 6 ... positioning member, 5a, 6a ... optical fiber core wire insertion hole, 7 ... bunching yarn winding machine (filament winding means ), 8: cylindrical body (cylindrical body), 9: laminated member, 9a: optical fiber ribbon insertion hole, 18: SZ slot, 21: slot groove, 22
... Optical fiber tape core wire, B ... Bunching thread (filament), T ... Reversing part, R ... Rotating part

Continued on the front page (72) Inventor Hiroto Watanabe 1440 Mukurosaki, Sakura City, Chiba Prefecture Inside Fujikura Sakura Factory (72) Inventor Suehiro Miyamoto 1440 Musaki, Sakura City, Chiba Prefecture Fujikura Co., Ltd. (72) Invention Person Hideyuki Iwata 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (5)

[Claims] 1. A laminated body in which a plurality of optical fiber ribbons are laminated is accommodated in a slot groove of a slot, and a filament is wound around the laminated body in the longitudinal direction. Characteristic optical fiber cable. 2. An optical fiber cable according to claim 1, wherein said slot groove is formed in an SZ twisted shape. 3. The optical fiber cable according to claim 2, wherein the optical fiber tape extends from the inverted portion of the slot groove to another inverted portion with reference to the width direction of the optical fiber ribbon at the rotating portion of the slot groove. The optical fiber ribbon is accommodated in the slot groove while being twisted so that the width direction of the ribbon is always substantially parallel to the width direction of the optical fiber ribbon in the rotating part. Characteristic optical fiber cable. 4. A method of manufacturing an optical fiber cable in which a plurality of optical fiber tape cores are accommodated in a slot groove of a slot by using a filament winding means, wherein the filament winding means has an outer periphery. And a laminated member having an optical fiber ribbon insertion hole shaped along the cross section of the laminated body obtained by laminating the plurality of optical fiber ribbons. A plurality of optical fiber tape core wires are sequentially inserted through the optical fiber tape core wire insertion hole of the laminated member of the striated body winding means, and the cylindrical body in which the striated body is previously wound around the outer periphery; These optical fiber ribbons are taken out with a part fixed to the optical fiber ribbon, the optical fiber ribbons are laminated, and the filament is wound around the laminated optical fiber ribbons. Fiber tape core Method of manufacturing an optical fiber cable, which comprises a sequence contained within a slot groove in the slot. 5. A method of manufacturing an optical fiber cable, wherein a plurality of optical fiber tape cores are accommodated in slot grooves of an SZ slot by using a wire wrapping means and a core position adjusting rotary plate, The filament winding means includes a cylindrical body around which the filament can be wound, and an optical fiber tape core insertion hole having a shape along a cross section of a laminate in which a plurality of optical fiber tapes are laminated. A lamination member, wherein the core line position adjusting rotary plate has an opening serving as a slot insertion portion near the center, and is rotatable with respect to the rotary plate on a peripheral side from the opening. A positioning member, wherein the positioning member is provided with an optical fiber ribbon insertion hole, wherein the SZ slot is inserted into the opening of the core position adjusting rotary plate, and a plurality of optical fiber ribbons are provided. The laminate member of the striatum winding means These optical fiber tape cores are inserted in order through the optical fiber tape core insertion hole, and the cylindrical body in which the filament is wound around the outer periphery in advance, and a part of the filament is fixed to the optical fiber tape core. Into the optical fiber tape core insertion hole of the positioning member of the core position adjusting rotary plate, and while rotating the core position adjusting rotary plate to arrange the optical fiber tape core in a predetermined position, the optical fiber tape Core wire,
While twisting the width direction of the optical fiber tape in the rotating portion of the slot groove so as to be always substantially parallel to the width direction, the optical fiber tape and the SZ slot are taken out, and the optical fiber tape is wound. A method of manufacturing an optical fiber cable, comprising: laminating, and winding an optical fiber tape core sequentially in the slot groove while winding the wire around the laminated optical fiber ribbon.