JPH11142704A - Method and device for manufacturing optical fiber cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device capable of efficiently and easily manufacturing an optical fiber cable which has superior postbranching performance and enables multi-cored. SOLUTION: This is a method for manufacturing an optical fiber cable which stores a coated optical fiber 37 in a slot groove of an SZ slot 35 and twists together a coated optical fiber 40 and a storage body 39 storing it on the slot 35 in an SZ twist state by using a rotary disk 16, the slot 35 storing the coated optical fiber 37 in the slot groove is inserted into the opening part of the rotary disk 16, at the same time, the coated optical fiber 40 and storage body 39 are inserted into a core insertion hole and a storage body insertion hole of the rotary disk 16, while these the slot 35, the fiber 40 and the storage body 39 are taken-off, the rotary disk 16 is rotated according to a slot groove phase to store the coated optical fiber 40 in the storage body 39 and also to twist together the storage body 39 on the slot 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing an optical fiber cable, and in particular, to easily and efficiently manufacture an optical fiber cable which is excellent in post-branchability and can be multi-core. And a method and apparatus for performing the method.

[0002]

2. Description of the Related Art In recent years, it has been studied to spread an optical fiber communication network to subscribers such as ordinary households. As a subscriber multi-core optical fiber cable used for such a purpose, for example, a cable having a structure shown in FIGS. 14 to 17 has been proposed. The optical fiber cable 31 shown in FIG. 14 to FIG.
The optical fiber core layer 33 and the sheath 34 are sequentially provided.

The slot type unit 32 includes a slot 35
And a plurality of optical fiber ribbons 37 accommodated in a plurality of slot grooves 36 formed on the outer periphery of the slot 35.
And a tape winding layer 38 provided on the slot 35. The slot 35 is an elongated body made of a plastic material such as polyethylene, and the center thereof is a tension member 3 made of a metal stranded wire, an FRP rod, or the like.
5a is inserted.

[0004] The slot 35 is an SZ slot in which the slot groove 36 is formed in an SZ twist shape, that is, an S twist and a Z twist are alternately repeated. Hereinafter referred to as partial return twist Z twist from S-twist of the slot grooves 36 (or S twist from Z twist) and the inverting unit T _1. In addition, the reversal part T ₁
A rotation point R ₁ is defined as an intermediate point from the rotation point R ₁ to the reversal part T ₁ adjacent thereto.
Call. Also referred to as distance from the inverting unit T ₁ to the reversing section T ₁ which is adjacent thereto and the inverting pitch p _1.

The plurality of optical fiber ribbons 37 accommodated in the slot groove 36 are accommodated in a stacked state. Hereinafter, the plurality of optical fiber tape core wires 37 in the stacked state may be referred to as a stacked body 37a. The tape winding layer 38 may be formed by winding a tape such as a polyester tape on the slot 35.

The optical fiber core layer 33 is composed of a plurality of gutter-like structures 39 serving as an optical fiber core accommodating body twisted in an SZ twist around the slot 35, and these gutter-like structures 3.
9 comprises an optical fiber tape core wire 40 accommodated in 9 and a tape winding layer 41 provided on the gutter-like structure 39.

The gutter-like structure 39 is a gutter-like long body made of a plastic material such as polyethylene and the like, and is arranged so that its opening faces the outer peripheral side of the cable. Hereinafter referred to as the midpoint of the reversing portion T ₂ of the trough-like structure 39 to the reversing section T ₂ which is adjacent thereto and the rotating part R _2. In addition, the inversion part T
The distance from the ₂ to the reversing unit T ₂ adjacent thereto is referred to as inversion pitch p _2. The plurality of optical fiber ribbons 40 housed in the gutter-like structure 39 are housed in a stacked state. Hereinafter, the plurality of optical fiber ribbons 40 in the laminated state may be referred to as a laminated body 40a.

The optical fiber ribbons 37, 4
0 indicates that the width direction of the optical fiber ribbon 3 at the rotating portions R ₁ and R ₂ of the slot groove 36 and the gutter-like structure 39 is 3.
It is made to be substantially parallel to the width direction of 7 and 40 (hereinafter, this state is referred to as a state with twisting).

In manufacturing the optical fiber cable 31 having the above structure, the optical fiber tape core 37 is accommodated in the slot groove 36 while the slot 35 and the optical fiber tape core 37 are being pulled. Forming a tape winding layer 38 to form a slot type unit 32 by forming a tape winding layer 38 on the outer periphery of the slot, and forming a gutter-like structure 39 containing an optical fiber ribbon 40 inside the slot type unit 32. Twisted so as to form SZ twist around the tape winding layer 41 thereon.
Is performed by separately performing the optical fiber core layer manufacturing step of forming the optical fiber.

Next, the optical fiber cable 31 having the above structure will be described.
For branching back the optical fiber ribbon 37 and the optical fiber ribbon 40 of FIG.
This will be described with reference to FIG. When the post-branching optical fiber ribbon 40 of the optical fiber layer 33, first, the sheath 3 of a portion located on the inverting portion T ₂ of the trough-like structure 39
4, and remove the tape winding layer 41 of the optical fiber layer 33 to expose the trough-like structure 39 in the vicinity of the inverted portion T _2. Then removed optical fiber ribbon 40 in the trough-like structure 39 of the inverting unit T ₂ from the trough structure 39 diverts. At this time, trough-like structure 39, since the inverted twisting direction at the inverting portion T _2, when taken out optical fiber ribbon 40 from the trough structure 39, loose optical fiber ribbon 40 state And the gutter-like structure 3
The operation of branching after separating from the line 9 becomes easy.

When the optical fiber ribbon 37 of the slot type unit 32 is branched off, first, the sheath 34 of a portion of the gutter-like structure 39 located on the inverted portion T ₂ is formed.
And the tape winding layer 41 of the optical fiber core layer 33 is removed, and the gutter-like structure 39 is exposed. Then, the reversal part T
The gutter-like structure 39 in the vicinity of ₂ is moved in a direction in which the gutter-like structure 39 becomes linear, and is made slack and separated from the slot-type unit 32 to expose the slot-type unit 32. Next, the tape winding layer 38 at the exposed portion is removed, and the slot 35 is exposed. Thus releasing the optical fiber ribbon 37 from the inverted portion T ₁ near the slot groove 36 of the slot 35 which is exposed to the rear branch.

In the optical fiber cable 31 having the above configuration,
Since the optical fiber core layer 33 is further provided on the slot type unit 32, the number of cores can be increased. Further, since the slot groove 36 is formed in an SZ twist shape and the gutter-like structure 39 is twisted in an SZ twist shape, the optical fiber ribbon 3 in the slot groove 36 is formed.
7, and the optical fiber ribbon 4 in the gutter-like structure 39
0 can be extracted by an easy operation.

The optical fiber cable 5 shown in FIG.
Reference numeral 1 denotes a structure in which two optical fiber core layers, that is, an inner optical fiber core layer 53 and an outer optical fiber core layer 54 are provided on a center tension member 52, and a sheath 34 is provided thereon.

The inner optical fiber core layer 53 includes a plurality of gutter-like structures 56 twisted in an SZ twist around the center tension member 52, and an optical fiber core 57 accommodated in these gutter-like structures 56. And a tape winding layer 58 provided on the gutter-like structure 56. The outer optical fiber core layer 54 includes a plurality of gutter-like structures 59 twisted in an SZ twist around the inner optical fiber core layer 53,
Optical fiber core wires 6 accommodated in these gutter-like structures 59
0, the tape wound layer 6 provided on the gutter-like structure 59
And 1.

When branching the optical fiber core 60 in the gutter-like structure 56 of the inner optical fiber core layer 53 of the optical fiber cable 51 shown here, the outer optical fiber core layer 54 is exposed, The gutter-like structure 59 near the inversion portion of the outer optical fiber core layer 54 is separated from the inner optical fiber core layer 53, and the gutter-like structure 5 of the inner optical fiber core layer 53 is separated.
After exposing 6, the optical fiber core 57 in the gutter-like structure 56 near the inversion portion is taken out.

The optical fiber cable 51 shown here is made of two
Inner optical fiber forming two steps, that is, twisting a gutter-like structure 56 containing an optical fiber ribbon 57 around the central tension member 52 to form a tape wound layer 58 and an inner optical fiber core layer 53 The core layer manufacturing process and the gutter-like structure 59 containing the optical fiber core 60 are
It is manufactured by twisting around the inner optical fiber core layer 53 and performing separately from the outer optical fiber core layer forming step of forming the tape winding layer 61.

[0017]

However, when the optical fiber cables 31 and 51 are manufactured using the above-described two-step manufacturing method,
There has been a problem that a great deal of labor and time are required, and the production efficiency is low. The present invention has been made in view of the above circumstances, and provides a method and apparatus capable of efficiently and easily manufacturing an optical fiber cable having excellent post-branchability and capable of multicore. Aim.

[0018]

SUMMARY OF THE INVENTION The object of the present invention is to accommodate a first optical fiber core in a slot groove of an SZ slot, and then to provide a second optical fiber core and an optical fiber core container accommodating the second optical fiber core. Using a twisted rotating plate for the core,
A method for manufacturing an optical fiber cable, which is twisted in an SZ twist form around an SZ slot on a Z slot,
As the core twisted rotating plate, one having an opening for SZ slot insertion near the center, and having an optical fiber core insertion hole and an optical fiber core container insertion hole on the peripheral side from the opening, The SZ slot in which the first optical fiber core is accommodated in the slot groove is inserted through the opening of the twisted rotating plate, and the second optical fiber core and the optical fiber core container are respectively inserted into the core. The twisting is performed by inserting the SZ slot, the second optical fiber core, and the optical fiber core container through the optical fiber core insertion hole and the optical fiber core container insertion hole of the twist rotating plate, and twisting the cores. An optical fiber for rotating the rotating plate according to the slot groove phase, accommodating the second optical fiber core in the optical fiber core housing, and twisting the optical fiber core housing on the SZ slot It can be solved by a manufacturing method of Buru. Further, as a method of manufacturing an optical fiber cable according to the present invention, a plurality of optical fiber cores and a plurality of optical fiber core housings accommodating the plurality of optical fiber cores are placed on a tension member by using a plurality of core twisted rotating plates. A method of manufacturing an optical fiber cable twisted in an SZ twist around a tension member so as to form a plurality of optical fiber core layers, as a core twisted rotating plate,
An opening for inserting a tension member near the center and having an optical fiber core insertion hole and an optical fiber core container insertion hole on the peripheral side of the opening is used, and the tension member is connected to the plurality of cores. The plurality of optical fiber cores and the optical fiber core container are sequentially inserted through the respective openings of the twisted rotating plate, and the optical fiber core insertion holes and the optical fiber cores of the plurality of cored twisted rotating plates are inserted. The tension member, the optical fiber core and the optical fiber core container are inserted through the container insertion holes, respectively, and while the plurality of core twisted rotary plates are located on the downstream side in the tension member withdrawal direction while the optical fiber core container is being taken. The optical fiber core is accommodated in the optical fiber core housing, and is rotated in accordance with the phase of the core twisting rotary plate adjacent to the upstream side in the take-up direction. The Aiba core housing may be adopted a method of twisting on the tension member. In addition, the optical fiber cable manufacturing apparatus of the present invention is characterized in that the second optical fiber core and the optical fiber core accommodating the second optical fiber core are placed on the SZ slot in which the first optical fiber core is accommodated in the slot groove of the SZ slot. The wire container is S
Core twisted rotary plate twisted in a Z twist shape, SZ
A slot groove phase detecting means for detecting the phase of the slot groove of the slot; and an SZ slot taking means for taking the SZ slot.
An opening for Z slot insertion, an optical fiber core container insertion hole and an optical fiber core insertion hole on a peripheral side of the opening, and a slot groove phase detected by the slot groove phase detecting means. It may be made rotatable based on. Further, the optical fiber cable manufacturing apparatus of the present invention includes a plurality of optical fiber cores and a plurality of optical fiber core housings accommodating the plurality of optical fiber cores, which are twisted in an SZ shape around the tension member. And a tension member pulling means for pulling a tension member. The core twisted rotary plate has an opening for inserting a tension member near the center, and is located on a peripheral side of the opening. The optical fiber core container insertion hole and the optical fiber core insertion hole are provided, and among the plurality of core twisted rotating plates, the rotating plate positioned downstream in the tension member pulling direction is a core adjacent to the upstream in the pulling direction. The wire twisting rotary plate may be configured to be rotatable according to the phase of the rotating plate.

[0019]

1 to 8 show a main part of a first example of an optical fiber cable manufacturing apparatus according to the present invention. The manufacturing apparatus shown here includes a slot supply roll 1, a slot-type unit manufacturing unit A for manufacturing a slot-type unit, an optical fiber core layer manufacturing unit B for providing an optical fiber core layer on the slot-type unit, and a winding unit. Take roll 2
1 and an SZ slot take-up roll 22 serving as SZ slot take-up means.

The slot type unit producing section A includes an optical fiber core supply roll 2 for feeding out an optical fiber tape core 37 as a first optical fiber core to be accommodated in the slot groove 36 of the slot 35, and a slot groove 36. Phase detecting plate 3 for detecting the phase of the optical fiber tape, a dividing plate 4 for guiding the optical fiber ribbon 37 to the vicinity of the slot 35, and an intermediate plate 5 for preventing the optical fiber ribbon 37 from entangled with the slot 35.
A first core-accommodating rotary plate 6 for arranging the optical fiber ribbon 37 at a position easily accommodated in the slot groove 36;
Between the dividing board 4 and the intermediate board 5, and between the intermediate board 5 and the first
And a plurality of optical fiber tape cores 37 disposed between the core accommodation rotary plate 6 and the optical fiber tape core 37.
A rotatable plate 8 that accommodates the optical fiber tape core 37 in the slot groove 36 and roughly winds the slot 35 on the slot 35; A tape longitudinal attachment device 10 for vertically attaching a tape onto a slot 35 roughly wound by a rough winding head 9
And a coarsely wound head 11 that forms a slot-type unit 32 by further roughly winding the slot 35 to which the tape is vertically attached by the tape longitudinally attaching device 10.

The optical fiber core layer producing section B includes a gutter-like structure supply roll 12 for supplying a gutter-like structure 39 and an optical fiber for supplying an optical fiber tape core 40 as a second optical fiber core. The core wire supply roll 13, the gutter-like structure 39, and the distribution plate 14 for guiding the optical fiber tape core wire 40 to the vicinity of the slot type unit 32 passing through the production section A, the gutter-like structure 39, and the optical fiber tape core. An intermediate board 15 for preventing the wire 40 from entangled with the slot type unit 32, a first core twisted rotating plate 16 for twisting the gutter-like structure 39 and the optical fiber ribbon 40 around the slot type unit 32. A plurality of core winding prevention eye plates 17 arranged between the branch plate 14 and the intermediate eye plate 15 and between the intermediate eye plate 15 and the first core wire twisting rotary plate 16;
A second core twisting rotating plate 18 for twisting the gutter-like structure 39 and the optical fiber ribbon 40 around the slot type unit 32, and a coarse winding head 19 for roughly winding the gutter-like structure 39; And a taping head 20 for winding a tape on a gutter-like structure 39.

First, the constituent members of the slot type unit manufacturing section A will be described. The phase detection eye 3 is a slot 3
A slot groove phase detecting means for detecting the phase of the fifth slot groove 36 is formed in a disk shape and is supported rotatably in the circumferential direction. In the vicinity of the center of the eye panel 3, an opening 3a for slot insertion is formed. The opening 3a
Is provided with a phase detection projection 3b that fits into the slot groove 36 when the slot 35 is inserted into the opening 3a.

The phase detection eye plate 3 is provided with a phase detector (not shown) for detecting the phase of the eye plate 3, and by using this, a slot of a slot located in the opening 3a is used. The phase of the groove can be detected.

The distribution plate 4 is provided with the optical fiber core supply roll 2.
The optical fiber ribbon 37 supplied from
5 and is formed in a disk shape having an outer diameter of about 150 to 500 mm. An opening for inserting a slot is provided in the vicinity of the center of the branch plate 4, and a plurality of optical fiber tape insertion holes are provided on the peripheral side of the opening. The optical fiber tape core wire insertion holes are provided in the same number as the slot grooves 36 in the circumferential direction of the distribution plate 4.

The core wire wrap preventing eye plate 7 is for preventing the optical fiber tape core wire 37 from becoming entangled with the slot 35, and is formed in a disk shape having an outer diameter of about 60 to 200 mm, and is turned in the circumferential direction. It is movably supported. Core winding prevention eye plate 7
Has an opening for slot insertion and a plurality of optical fiber tape core wire insertion holes, like the distribution board 4.

The intermediate board 5 has a function similar to that of the core wire wrap preventing board 7, is formed in a disk shape having an outer diameter of about 60 to 200 mm, and is supported rotatably in the circumferential direction. I have. The intermediate board 5 has an opening for inserting a slot and a plurality of optical fiber ribbon insertion holes, like the distribution board 4.

The first core-holding rotary plate 6 is provided for arranging the optical fiber ribbon 37 at a position where the optical fiber ribbon 37 is easily accommodated in the slot groove 36 and for keeping the optical fiber tape core 37 in a good twisted state. The outer diameter is 100-200m
It is formed in a disk shape of about m and is supported so as to be rotatable in the circumferential direction. An opening 6a for inserting a slot is provided in the vicinity of the center of the rotating plate 6, and a plurality of optical fiber tape insertion holes 6b are provided on the peripheral side of the opening 6a. The number of the insertion holes 6 b is equal to the number of the slot grooves 36 in the circumferential direction of the rotary plate 6.

On the slot supply roll 1 side of the rotary plate 6,
A plurality of positioning members 25 are provided to close the insertion holes 6b. These positioning members 25 are provided for maintaining the twisted state of the optical fiber ribbon 37 in a favorable state, and are provided so as to be rotatable in the circumferential direction thereof with respect to the rotating plate 6. The source can be rotated at any speed and direction. Positioning member 2
5 is provided with a plurality of optical fiber insertion holes 25 a, and these insertion holes 25 a are formed in a shape along the cross section of the optical fiber tape core 37. The insertion hole 25a of the positioning member 25 is preferably formed at a position where the distance from the outer periphery of the slot, that is, the distance a shown in FIG.

The rotating plate 6 is a distance from the position where the optical fiber ribbon 37 is accommodated in the slot groove 36 in the rough winding head 9 (hereinafter referred to as a core accommodating position) to the rotating plate 6, ie, the core accommodating portion. The distance (distance 1 shown in FIG. 2) from the position to the positioning member 25 is set at a position where the distance is about 50 to 500 mm.

Each of the rotating plate 6 and the intermediate plate 5 is provided with a phase adjuster (not shown), so that the phases of the rotating plate 6 and the intermediate plate 5 can be arbitrarily adjusted by using these. ing. These phase adjusters are connected to the phase detector of the phase detecting eye plate 3, and the rotating plate 6 is adjusted in accordance with the phase of the slot groove 36 detected by the phase detector.
In addition, the phase of the intermediate board 5 can be arbitrarily set.

The second core-accommodating rotary plate 8 is for stacking the optical fiber tape cores 37 and arranging them at a position where they can be easily accommodated in the slot groove 36.
It is formed in a disc shape of about 00 mm, and is supported so as to be rotatable in the circumferential direction. An opening 8a for inserting a slot is formed in the vicinity of the center of the rotating plate 8, and a plurality of optical fiber insertion holes 8b are provided at positions on the peripheral side of the opening 8a. These insertion holes 8 b are provided in the same number as the slot grooves 36 in the circumferential direction of the rotating plate 8. On the inner edge of the opening 8a of the rotating plate 8, a phase detection projection 8c fitted into the slot groove 36 when the slot 35 is inserted through the opening 8a.
Is provided.

A plurality of positioning members 26 are provided on the surface of the rotary plate 8 on the side of the slot supply roll 1 so as to close the insertion holes 8b. These positioning members 26 are for laminating a plurality of optical fiber tape core wires 37 and have an outer diameter of 2 to 3.
It is formed in a disk shape of about 10 mm, and
It is provided rotatably in its own circumferential direction. The positioning member 26 is provided with optical fiber core insertion holes 26a for inserting the optical fiber tape cores 37, and these insertion holes 26a are provided with a plurality of optical fiber tape cores 37 (laminated). It is formed in a rectangular shape along the cross section of the body 37a). The insertion hole 26a of the positioning member 26 has a distance from the outer periphery of the slot, that is, a distance b shown in FIG.
It is preferably formed at a position of about 5 mm.

The rotating plate 8 is located at a position where the distance from the core wire accommodating position to the rotating plate 8, that is, the distance from the core wire accommodating position to the positioning member 26 (the distance s shown in FIG. 2) is about 5 to 50 mm. Will be installed.

The coarsely wound head 9 is for accommodating the optical fiber ribbon 37 passing through the rotary plate 8 in the slot groove 36 and for roughly winding the optical fiber on the slot 35, and is formed in a disk shape. It has a rotating plate 9a and a plurality of coarsely wound yarn supply rolls 9b arranged along the circumferential direction. The rotating plate 9a has an opening 9 for inserting a slot near the center.
c, which is provided so as to be rotatable in the circumferential direction by a drive source (not shown). Coarse winding yarn supply roll 9b
A coarsely wound yarn such as a nylon yarn is wound around it. By rotating the rotating plate 9a, the coarsely wound yarn is unwound from the supply roll 9b, and is roughly wound onto the slot 35, and the optical fiber ribbon is wound. 37 is configured to be accommodated in the slot groove 36.

The tape longitudinally attaching device 10 is for longitudinally attaching a vertically attached tape such as a polyester tape supplied from a tape supply roll 10a to a roughly wound slot 35.

The coarse winding head 11 is provided with a tape longitudinal attachment device 10.
This is for roughly winding on the slot 35 which has been passed through, and has a structure similar to that of the roughly wound head 9.

Next, the constituent members of the optical fiber core layer forming section B will be described. The branch plate 14 is provided with the optical fiber ribbon 4 supplied from the optical fiber ribbon supply roll 13.
0 and the gutter-like structure 39 supplied from the gutter-like structure supply roll 12 are guided to the vicinity of the slot type unit 32, and are formed in a disk shape having an outer diameter of about 150 to 500 mm. An opening for slot insertion is provided near the center of the branch plate 14, and a gutter-like structure insertion hole serving as a plurality of optical fiber core container insertion holes is provided at a position on the peripheral side of the opening, A plurality of optical fiber ribbon insertion holes are provided at positions on the peripheral side of the gutter-like structure insertion holes.

The core wire wrap preventing eye plate 17 is for preventing the optical fiber tape core wire 40 and the gutter-like structure 39 from becoming entangled with the slot type unit 32, and has an outer diameter of 60 to 200 mm.
It is formed in the shape of a circular plate, and is supported rotatably in the circumferential direction. The core wire wrap prevention eye plate 17 is provided with an opening for slot insertion, a gutter-like structure insertion hole,
And an optical fiber tape core wire insertion hole.

The intermediate board 15 has a function similar to that of the core wire wrap preventing board 17, is formed in a disk shape having an outer diameter of about 60 to 200 mm, and is supported rotatably in the circumferential direction. I have. The intermediate board 15 has an opening for slot insertion, a plurality of trough-shaped structure insertion holes, and an optical fiber tape core wire insertion hole, like the distribution board 14.

The first twisting rotary plate 16 is arranged at a position suitable for twisting the optical fiber ribbon 40 and the gutter-like structure 39 around the slot type unit 32, and the optical fiber ribbon is rotated. This is for keeping the twisted state of the wire 40 good, and the outer diameter is 100 to 200.
It is formed in a disk shape of about mm and is supported rotatably in the circumferential direction. An opening 16a for slot insertion is provided in the vicinity of the center of the rotating plate 16, and a plurality of gutter-like structure insertion holes 16c are provided at positions on the peripheral edge side of the opening 16a. A plurality of optical fiber ribbon insertion holes 16b are provided at the peripheral side position. The trough-shaped structure insertion holes 16c are formed along the cross-sectional shape of the trough-shaped structure 39. When the trough-shaped structure 39 is inserted, these openings face radially outward of the rotating plate 16. It is provided as follows. The gutter-shaped structure insertion hole 16c has a distance from the outer periphery of the slot, that is, a distance a ′ shown in FIG.
It is preferably formed at a position of about 20 mm.

A plurality of positioning members 27 are provided on the rotary plate 16 on the side of the slot supply roll 1 so as to close the insertion holes 16b. These positioning members 27 are for maintaining the twisted state of the optical fiber ribbon 40 in a favorable state, and are provided rotatably in the circumferential direction of the rotating plate 16 with respect to the rotating plate 16. The source can be rotated at any speed and direction. The positioning member 27 is provided with optical fiber insertion holes 27a, and these insertion holes 27a are formed in a shape along the cross section of the optical fiber tape core 37.

The rotating plate 16 extends from the position where the gutter-like structure 39 and the optical fiber ribbon 40 are twisted on the slot type unit 32 in the coarse winding head 19 (hereinafter referred to as the twisting position) to the rotating plate 16. The distance, that is, the distance from the twisting position to the positioning member 27 (FIG. 6)
Is set at a position where the distance l ′) shown in FIG.

Each of the rotating plate 16 and the intermediate plate 15 is provided with a phase adjuster (not shown), so that the phases of the rotating plate 16 and the intermediate plate 15 can be arbitrarily adjusted by using these. ing. These phase adjusters are connected to the phase detector of the above-mentioned phase detecting eyeboard 3, and the phases of the rotating plate 16 and the intermediate eyeboard 15 can be arbitrarily adjusted in accordance with the phase of the slot groove 36 detected by this phase detector. It can be set to.

The second twisted rotating plate 18 is positioned at a position suitable for twisting the optical fiber ribbon 40 and the gutter-like structure 39 around the slot type unit 32 around the optical fiber ribbon 40. It is for placing and laminating the optical fiber ribbon 40, and has an outer diameter of 3
It is formed in a disk shape of about 0 to 100 mm, and is supported rotatably in the circumferential direction. An opening 18a for slot insertion is formed near the center of the rotating plate 18, and a plurality of gutter-like structure insertion holes 18c and optical fiber core wire insertion holes 18b are provided at positions on the peripheral side of the opening 18a. I have. The gutter-like structure insertion hole 18c is preferably formed at a position where the distance from the outer periphery of the slot, that is, the distance b 'shown in FIG. 8, is about 1 to 10 mm.

A plurality of positioning members 28 are provided on the surface of the rotary plate 18 on the side of the slot supply roll 1 so as to cover the insertion holes 18b. These positioning members 28 are for laminating a plurality of optical fiber tape core wires 40, are formed in a disk shape having an outer diameter of about 2 to 10 mm, and rotate with respect to the rotating plate 18 in its own circumferential direction. It is provided freely. The positioning member 28 is provided with an optical fiber core insertion hole 28a for inserting the optical fiber core 40, and these insertion holes 28a are provided in a plurality of optical fiber tape cores 40 (laminated). It is formed in a rectangular shape along the cross section of the body 40a).

The distance from the twisting position to the rotating plate 18, that is, the distance from the twisting position to the positioning member 28 (the distance s' shown in FIG. 6) is 5 to 50 mm.
It is installed in the position where it becomes a degree.

The coarsely wound head 19 accommodates the optical fiber ribbon 40 passed through the second twisted rotary plate 18 in a gutter-like structure 39, and the gutter-like structure accommodating the optical fiber ribbon 40. The body 39 is twisted around the slot type unit 32 and is roughly wound on the gutter-like structure 39. Like the coarsely wound head 9 described above, the opening 19 is formed.
c provided with the rotating plate 19a and the coarsely wound yarn supply roll 1
9b.

The coarse winding head 19 has a distance between the twisting position, that is, the position where the coarse winding yarn supplied from the roll 19b is wound on the gutter-like structure 39, and the above-described core wire accommodating position of the coarse winding head 9. It is installed in the inverted pitch p ₁ of the integral multiple a position of the slot groove 36. Incidentally, the distance from the core wire receiving position of the coarse winding head 9 until the phase detection th plate 3 on which is an integral multiple of the inverted pitch p _1, reversing a distance from roughly coiled head 19 until the phase detection th plate 3 pitches p _The coarse winding head 9 and the coarse winding head 19 are set to an integral multiple of _1.
Distance may be an integral multiple of the inverted pitch p ₁ a between.

The taping head 20 includes a rough winding head 19.
This is for winding a tape such as a polyester tape on the gutter-like structure 39 which has been roughly wound by the slot type unit 32, and the opening 20a for inserting the gutter-like structure 39 twisted on the slot type unit 32 therethrough. The tape is rotated in the circumferential direction of the unit 32 by a drive source (not shown), and the tape can be wound on the gutter-like structure 39.

Next, FIG. 14 to FIG.
A first example of a method for manufacturing an optical fiber cable according to the present invention will be described with an example of manufacturing the optical fiber cable 31 shown in FIG. First, the slot 35 is divided into the phase detection plate 3, the dividing plate 4, the plates 7, 5, 7, the rotating plates 6, 8, the coarse winding head 9, the tape longitudinal attaching device 10, the coarse winding head 11, the dividing plate. 14, a state in which each of the eyelets 17, 15, 17, the rotating plates 16, 18, the rough winding head 19, and the taping head 20 are sequentially inserted into the respective openings, using a winding roll 21 and a take-up roll 22, and arrows in the drawing. Takes at a constant speed in the direction. At this time, the phase detection projection 3b of the phase detection eye plate 3 and the phase detection projection 8a of the rotating plate 8 are arranged in the slot groove 36.

At the same time, a plurality of, preferably 2 to 10 optical fiber ribbons 37 per slot groove.
Is pulled out from the optical fiber core supply roll 2, and sequentially inserted through the optical fiber tape core insertion holes of the distribution plate 4, the eye plates 7, 5, 7, and the rotating plates 6, 8, and then the coarse winding head 9 At a constant speed in the direction indicated by an arrow in FIG.

At the same time, the gutter-like structure 39 is pulled out from the gutter-like structure supply roll 12, and the dividing plate 14,
7, 15, 17 and each of the gutter-like structure insertion holes of the rotating plates 16, 18 and a plurality of, preferably 2 to 10 optical fiber ribbons 40 per gutter-like structure 39, After being pulled out from the optical fiber core supply roll 13 and inserted through the respective optical fiber tape core insertion holes of the distribution plate 14, the eye plates 17, 15, 17 and the rotating plates 16, 18, the optical fiber tape core 40 is removed. The gutter-like structures 39 are housed in the gutter-like structures 39, and are pulled in the direction of the arrow in the drawing at the above-mentioned constant speed in a state where the gutter-like structures 39 are inserted through the openings 19c of the rough winding head 19.

According to the above operation, first, in the slot type unit manufacturing section A, the slot type unit 32 is manufactured as follows. The optical fiber ribbon 37 is
As described above, it reaches the coarse winding head 9 through the optical fiber tape core wire insertion holes of the distribution plate 4, the eye plates 7, 5, 7, and the rotating plates 6, 8. In this process, the optical fiber ribbon 37 is
When the rotary plate 8 passes through the insertion hole 26 a of the positioning member 26, the rotary plate 8 is in a stacked state. Subsequently, the coarsely wound yarn is wound on the slot 35 by the coarsely wound head 9, and
The optical fiber ribbons 37 are stacked in slot grooves 36.
Are sequentially accommodated within.

At this time, as the slot 35 is taken, the phase of the slot groove 36 in the portion located in the opening 3a of the slot phase detecting eye plate 3 changes. Slot groove 3
Since the phase detecting projections 3b are disposed in the slot 6, the slot phase detecting eyeplate 3 rotates in the circumferential direction in accordance with the position of the slot grooves 36, and the phase of the slot grooves 36 in the opening 3a is detected by the phase detection. Detected by the machine. The phase of the slot groove 36 detected by this phase detector and the slot groove 3
6, the phase of the slot groove 36 at the core wire accommodating position of the coarse winding head 9 can be known from the inversion pitch p ₁ and the distance from the phase detection eye 3 to the coarse winding head 9.

Here, the rotary plate 6 is rotated by driving the phase adjuster provided on the rotary plate 6 in accordance with the phase of the slot groove 36 at the core wire accommodating position detected by using the phase detector. And place it in a predetermined position. Rotating plate 8
Is disposed in the slot groove 36, the rotating plate 8 rotates according to the phase of the slot groove 36 in the opening 8a.

FIG. 9 is a graph showing an example of the relationship between the phase of the slot groove 36 and the phases of the rotating plates 6 and 8 at the core wire accommodating position. In this graph, the horizontal axis is slot 3
The vertical axis indicates the phases of the slot groove 36 and the rotating plates 6 and 8. In this example, the rotating plates 6 and 8 make periodic movements such that the rotating direction changes at every predetermined slot take-off distance, and the rotation period is substantially equal to the rotation period of the phase detection eye plate 3. Is set. FIG. 9 also shows an example of the operation of the phase detection eyeboard 3 and the intermediate eyeboard 5. In this example, the intermediate board 5 has a phase that is about half the phase of the rotating plates 6 and 8.
It turns so that it becomes.

By rotating the rotating plates 6 and 8 as described above, the optical fiber ribbon 37 is inserted into the slot groove 3.
6, the optical fiber ribbon 37 is arranged at a position where it can be easily accommodated in the slot groove 36, for example, at a position where the longitudinal direction of the optical fiber ribbon 37 is close to the tangential direction of the slot groove 36 at the core wire accommodating position. Can be prevented from falling out of the slot groove during the accommodation, and the core can be securely accommodated.

At the same time, the positioning member 25 provided on the rotary plate 6 is forcibly rotated with respect to the rotary plate 6 by a drive source (not shown) so that the width direction of the optical fiber ribbon 37 is changed to the slot groove. always made to be substantially parallel to the width direction of the optical fiber ribbon 37 in the rotation unit R ₁ of 36. Thereby, the optical fiber ribbon 37 is
It is forcibly turned into a twisted state.

At this time, since the laminated body 37a is formed by laminating a plurality of optical fiber tape core wires 37, the laminated body 37a is hardly bent in the width direction and the thickness direction and is hardly twisted. For this reason, when the rotating plate 8 rotates, stress is applied to the laminated body 37 a in a direction of twisting the laminated body 37 a by the positioning member 26. It rotates in the circumferential direction, and the width direction of the stacked body 37a is always kept constant.

Subsequently, the optical fiber ribbon 37 is accommodated in the slot groove 36 in the coarsely wound head 9 as described above, and the tape 35 is vertically attached to the roughly wound slot 35 by the tape longitudinally attaching device 10. The tape is longitudinally attached, and further coarsely wound in the coarsely wound head 11, and the slot 3
The slot type unit 32 in which the tape winding layer 38 is formed on 5 is obtained.

Next, in the optical fiber core layer manufacturing section B, the optical fiber core layer 33 is placed on the slot type unit 32.
Is formed. The optical fiber ribbon 40 and the gutter-like structure 39 are connected to the distribution plate 14,
5 and 17 and the coarsely wound head 1 through the optical fiber tape core insertion holes and the gutter-shaped structure insertion holes of the rotating plates 16 and 18.
Reaches 9.

In this process, the optical fiber ribbon 40
Are stacked when passing through the insertion hole 28a of the positioning member 28 of the rotating plate 18. Subsequently, the rough winding head 19
The coarsely wound yarn is wound on the gutter-like structure 39 by the above-described method, and the optical fiber ribbons 40 are accommodated in the gutter-like structure 39 in a stacked state, and the gutter-like structure 39 containing the optical fiber tape cores 40 is housed. Are arranged on the slot type unit 32.

In the method of manufacturing an optical fiber cable according to this embodiment, the rotating plate 16 is adjusted in accordance with the phase of the slot groove 36 detected by the phase detector of the phase detecting eye plate 3.
By rotating the rotating plate 16 by driving the phase adjuster provided in the trough-like structure 39, the inversion integral multiple of the pitch p ₁ of the inversion pitch p ₂ slot groove 36, preferably the inverted pitch p ₁ Twisted around the slot type unit 32 in an SZ twist so as to be equal.

Further, the phase of the slot groove 36 in the phase detection eye 3 detected by the phase detector of the phase detection eye 3, the reversal pitch p ₁ of the slot groove 36, and the coarsely wound head from the phase detection eye 3. From the distance up to 19, the phase of the slot groove 36 at the twisting position of the coarse winding head 19 can be known. The slot groove 36 at this twisted position
The rotating plate 16 is rotated according to the phase.

FIG. 10 shows the phase of the gutter-like structure 39 at the twisting position at the core wire accommodating position and the rotation plates 16, 1, and 2.
8 is a graph illustrating an example of a relationship with a phase of No. 8; In this graph, the horizontal axis indicates the take-off distance of the slot 35, and the vertical axis indicates the phases of the phase detection eye panel 3 and the rotary plates 16 and 18. In this example, the rotating plates 16 and 18 make a periodic motion, and the period is made to substantially coincide with the period of the phase detecting eye plate 3, so that the gutter-like structure 39 has an inversion pitch p ₂ of the slot 35. The slot type unit 3 is set so as to be substantially equal to the inversion pitch p ₁ of the slot groove 36.
2 are twisted. FIG. 10 also shows an example of the operation of the phase detection eye 3 and the intermediate eye 15. In this example, the intermediate board 15 rotates so that the phase thereof is about half the phase of the rotary plates 16 and 18.

In the method of manufacturing an optical fiber cable according to this embodiment, the rotating plates 16 and 18 are rotated in accordance with the phase of the slot groove 36 at the twisting position as described above, and the gutter-like structure 39 is turned over. T ₂ is the inverted portion T _{1 of the} slot groove 36
Are twisted on the slot type unit 32 so as to be located immediately above the slot type unit 32.

Further, as described above, the distance between the twisted position of the coarse winding head 19 and the core wire accommodating position of the phase detection eye plate 3 or the coarse winding head 9 is determined by the inversion pitch p _{1 of the} slot groove 36.
Therefore, the phase of the slot groove 36 at the twisting position is equal to the phase of the slot groove 36 at the core wire accommodating position. Therefore, the timing of forming the reversal portion T ₂ of the gutter-shaped structure 39, that is, the timing of reversing the rotation direction of the core twisting rotary plate 16 is matched with the reversal timing of the core housing rotary plate 6. The control of the rotating plate 16 is facilitated.

At the same time, the positioning member 27 provided on the rotary plate 16 is forcibly rotated with respect to the rotary plate 16 by a drive source (not shown), and the optical fiber ribbon 40 is
To the gutter-like structure 39
Housed within.

Subsequently, the optical fiber ribbon 40 is accommodated in the gutter-like structure 39 in the coarse winding head 19, and these gutter-like structures 39 are formed around the slot type unit 32 by S
It is twisted in a Z-twist shape, and a rough winding is applied thereon.
Next, the tape is further wound by the taping head 20. Thereby, the slot type unit 32
An optical fiber core layer including a gutter-like structure 39, an optical fiber ribbon 40 accommodated in the gutter-like structure 39, and a tape winding layer 41 provided on the gutter-like structure 39 3
3 is formed.

[0070] Then, the sheath 34 is formed on the optical fiber layer 33, to obtain the optical fiber cable 31 which is positioned just above the inversion portion T ₁ of the reversing portion T ₂ slot groove 36 of the trough-like structure 39 .

In the above manufacturing method, the slot type unit 32 is manufactured by housing the optical fiber core 37 in the slot groove 36 of the slot 35, and the gutter-like structure 3
Steps such as twisting 9 can be performed in one production line. Therefore, it is possible to efficiently and easily manufacture an optical fiber cable having excellent post-branchability and capable of multicore.

Further, in the above manufacturing method, the phase detection
The rotating plate 16 is rotated according to the phase of the slot groove 36 at the twisting position detected by using the phase detector of
The trough-like structure 39, the inverted portion T ₂ is reliably slot groove 36
It can be twisted in the periphery of the slot type unit 32 so as to be positioned directly above the inversion unit T _1.

In the optical fiber cable obtained by the above-described manufacturing method, the gutter-like structure 39 is twisted around the slot type unit 32 such that the inverted portion T ₂ is located immediately above the inverted portion T ₁ of the slot groove 36. since those keyed, is spaced a trough-like structure 39 in the vicinity of the inverted portion T ₂ from the slot type unit 32, by removing the tape winding layer 38 thereunder, the slot groove 36 of the slot type unit 32 it can be easily expose the inverting unit T _1. For this reason, the optical fiber core layer 33 on the outer peripheral side of the cable is used.
Not only the optical fiber core 40 but also the optical fiber core 37 in the slot groove 36 can be taken out by an easy operation, and the post-branching property is excellent.

Further, in the above-mentioned manufacturing apparatus, an optical fiber cable which is excellent in post-branchability and can be multi-core can be efficiently and easily manufactured by a simple operation. Moreover, twisting and position of the coarse winding head 19, the distance between the core wire receiving position of the phase detection th plate 3 or Somaki head 9 is an integral multiple of the inverted pitch p ₁ of the slot groove 36, the twist The phase of the slot groove 36 at the matching position is equal to the phase of the slot groove 36 at the core wire accommodating position. Therefore, the timing of forming the reversal portion T ₂ of the gutter-shaped structure 39, that is, the timing of reversing the rotation direction of the core twisting rotary plate 16 is matched with the reversal timing of the core housing rotary plate 6. Can turn plate 1
6 can be facilitated.

In the above manufacturing method, the rotating plate 1
6 and 18, the period of which is substantially equal to the rotation period of the phase detection eye plate 3;
The gutter-like structure 39 is rotated so that
Chip _TwoIs the reversal pitch p of the slot groove 36 of the slot 35₁
Twist on the slot type unit 32 so that it is almost equal to
Although the example of combining is shown, the manufacturing method of the present invention
11 and 12, as shown in FIGS.
6 and 18 with respect to the rotation cycle of the
The gutter-like structure 39 is turned so that it is twice as large
Pitch p_TwoIs the inverted pin of the slot groove 36 of the slot 35.
Chip₁On the slot type unit 32 so as to be twice as large as
You may twist. Further, the inversion pitch p_TwoBut
Pitch p of the groove 36₁It will be an integer multiple of 3 or more
The rotating plates 16 and 18 may be rotated like this.

The manufacturing apparatus has a configuration including a slot supply roll 1, a slot-type unit producing section A, an optical fiber core layer producing section B, a winding roll 21, and a take-up roll 22. However, the present invention is not limited to this, and one or more optical fiber core layer manufacturing units B may be further provided between the optical fiber core layer manufacturing unit B and the take-up roll 21. In this case, A plurality of optical fiber core layers are provided on the slot type unit 32, so that a multi-core optical fiber cable can be obtained.

FIG. 13 shows a main part of a second example of the manufacturing apparatus according to the present invention. In the following description,
Members common to those used in the manufacturing apparatus of the first example are denoted by the same reference numerals, and description thereof will be omitted or simplified. Hereinafter, a second example of the method for manufacturing an optical fiber cable according to the present invention will be described by taking as an example a case where the optical fiber cable 51 shown in FIG. 17 is manufactured using this apparatus.

The manufacturing apparatus shown here comprises a tension member supply roll 1 ′ and first and second optical fiber cores provided with two optical fiber core layers on the tension member supplied by the supply roll 1 ′. It has layer forming units B ₁ and B ₂ , a take-up roll 21, and a tension member take-up roll 22 ′ serving as tension member take-up means.

The first and second optical fiber core layer forming units B ₁ and B ₂ supply a gutter-like structure supply roll 12 for supplying a gutter-like structure 59 and an optical fiber tape core 60, respectively. Optical fiber core supply roll 13 and distribution plate 14
, An intermediate board 15, and a first core twisted rotary plate 16
, A core winding prevention plate 17, a second core twisting rotating plate 18, a coarse winding head 19, and a taping head 20.
It is comprised including.

A phase adjuster is provided on the rotating plates 16 and 16 of the production units B ₁ and B ₂ , and the phase adjuster of the rotating plate 16 of the second production unit B ₂ is provided with the first production unit B is connected to the _first phase adjuster of the rotary plate 16, the second rotation plate 16 Preparation section B _2, can be rotated in accordance with the phase of the first producing unit B ₁ of the rotating plate 16 It has become.

In manufacturing an optical fiber cable using this apparatus, first, the center tension member 52 is used.
Is drawn at a constant speed in the direction of the arrow in the figure through the optical fiber core layer forming units B ₁ and B ₂ using a take-up roll 22 ′.
At the same time, the optical fiber cores 57 and 60 are pulled out from the optical fiber core supply rolls 13 of the first and second optical fiber core layer forming parts B ₁ and B ₂ , respectively, and the branching plates 14 and 60 are respectively provided.
The gutter-like structures 56 and 59 are supplied to the gutter-like structures of the production units B ₁ and B _{2 while} being inserted into the optical fiber tape core wire insertion holes of the eye plates 17, 15 and 17 and the rotating plates 16 and 18. Pulled out from the roll 12, the distribution plate 14 and the eye plate 1 respectively
7, 15, 17 and the gutter-like structure insertion holes of the rotating plates 16, 18, and then the optical fiber ribbons 57, 6 are inserted.
0 are accommodated in the gutter-like structures 56 and 59, respectively, and these gutter-like structures 56 and 59 are inserted through the openings 19c of the coarsely wound heads 19 of the production parts B ₁ and B ₂ , respectively, in a direction indicated by an arrow in FIG. At a constant speed.

At this time, the rotating plates 16 and 18 of the first optical fiber core layer forming section B ₁ are rotated as described in the description of the manufacturing method of the first example, and the gutter-like structure 56 is formed. Are twisted in a SZ twist on the center tension member 52 to form the inner optical fiber core layer 53.

Next, the second optical fiber core layer forming section B
_{The two} rotating plates 16 and 18 are rotated, and the gutter-like structure 59 is
The outer optical fiber core layer 54 is formed on the gutter-like structure 56 by twisting in an SZ twist form. At this time, the second production unit B
_By rotating the _second rotating plate 16 based on the phase of the rotating plate 16 of the _first production section B ₁ , for example, as shown in FIG. 10 or FIG. 12, the gutter shape of the inner optical fiber core layer 53 is formed. The inverted portion of the structure 59 can be located immediately above the inverted portion of the gutter-like structure 56 of the outer optical fiber core layer 54. Next, the sheath 34 is provided on the outer optical fiber core layer 54 to obtain the optical fiber cable 51.

In the manufacturing method of this example, the gutter-like structure 56 accommodating the optical fiber core 57 is twisted around the center tension member 52 by using the optical fiber core layer forming parts B ₁ and B _2. A step of forming the inner optical fiber core layer 53 and twisting a gutter-like structure 59 around the inner optical fiber core layer 53 to form the outer optical fiber core layer 54 can be performed in one production line.

Since the rotating plate 16 of the _second producing section B ₂ is rotated according to the phase of the rotating plate 16 of the _first producing section B ₁ , the gutter-like structure of the outer optical fiber core layer 54 is formed. 59,
Twisting can be performed such that the inverted portion is located immediately above the inverted portion of the gutter-like structure 56 of the inner optical fiber core layer 53. Therefore, similarly to the above-described manufacturing method of the first example, an optical fiber cable having excellent post-branchability and capable of multicore can be efficiently and easily manufactured.

In the second example, the two optical fiber core layer forming units B ₁ and B ₂ are used.
Three or more optical fiber core layers may be provided on the center tension member by using one or more optical fiber core layer producing units. Further, the rotating plates 8 and 18 of the manufacturing apparatus of the first and second examples may be provided with a phase adjuster in the same manner as the rotating plates 6 and 16. , 1
It is also possible to rotate 8.

[0087]

As described above, in the method of manufacturing an optical fiber cable according to the present invention, an optical fiber cable having excellent post-branchability and capable of multicore is efficiently and easily manufactured. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a main part of a first example of an optical fiber cable manufacturing apparatus of the present invention.

FIG. 2 is a schematic configuration diagram showing a main part of the manufacturing apparatus shown in FIG.

FIG. 3 is a plan view showing a phase detection eye plate of the manufacturing apparatus shown in FIG.

FIG. 4 is a plan view showing a first cord-containing rotating plate of the manufacturing apparatus shown in FIG. 1;

5A is a plan view showing a second core-accommodating rotary plate of the manufacturing apparatus shown in FIG. 1. FIG. (B) It is a top view which shows the positioning member of the core wire accommodation rotary plate shown to (A).

FIG. 6 is a schematic configuration diagram illustrating a main part of the manufacturing apparatus illustrated in FIG. 1;

FIG. 7 is a plan view showing a first core twisted rotary plate of the manufacturing apparatus shown in FIG. 1;

FIG. 8A is a plan view showing a second core twisted rotary plate of the manufacturing apparatus shown in FIG. 1; (B) It is a top view which shows the positioning member of the core twisted rotary plate shown to (A).

9 shows operations of a phase detecting face plate, an intermediate face plate, a first core wire accommodating rotary plate, and a second core wire accommodating rotary plate when an optical fiber cable is manufactured using the manufacturing apparatus shown in FIG. Is a graph showing an example of the relationship between the phase of each eye plate and the rotating plate and the slot take-off distance.

FIG. 10 is a diagram illustrating a phase detection face plate, an intermediate face plate, a first core wire twisted rotary plate, and a second core wire twisted rotary plate when an optical fiber cable is manufactured using the manufacturing apparatus shown in FIG. 1; 3 is a graph showing an example of the operation of FIG. 3, showing the relationship between the phase of each eye panel and rotating plate and the slot take-off distance.

11 shows operations of a phase detection face plate, an intermediate face plate, a first core wire accommodation rotary plate, and a second core wire accommodation rotary plate when manufacturing an optical fiber cable using the manufacturing apparatus shown in FIG. 7 is a graph showing another example of the present invention, and shows the relationship between the phase of each eye plate and rotating plate and the slot take-off distance.

FIG. 12 is a diagram illustrating a phase detection face plate, an intermediate face plate, a first twisted-wire rotating plate, and a second twisted-wire rotary plate when an optical fiber cable is manufactured using the manufacturing apparatus illustrated in FIG. 1; 5 is a graph showing another example of the operation of FIG. 5, showing the relationship between the phase of each eye panel and rotating plate and the slot take-off distance.

FIG. 13 is a schematic configuration diagram showing a main part of a second example of the optical fiber cable manufacturing apparatus of the present invention.

FIG. 14 shows an example of an optical fiber cable.
(A) is a sectional view, and (B) is a perspective view of a gutter-like structure.

15 is an explanatory diagram showing an internal structure of the optical fiber cable shown in FIG.

FIG. 16 is an explanatory diagram showing the internal structure of the optical fiber cable shown in FIG.

FIG. 17 is a sectional view showing another example of the optical fiber cable.

[Explanation of symbols]

3 ··· Phase detection eye plate (slot groove phase detection means), 16.
..First core twisted rotary plate, 18 ... second core twisted rotary plate, 16a, 18a ... opening, 16b,
18b ··· Optical fiber tape core wire insertion hole (optical fiber core wire insertion hole), 16c, 18c ··· Gutter-like structure insertion hole (optical fiber core wire container insertion hole) 22 ··· SZ slot take-off roll (SZ slot take-up means), 22 '... tension member take-up roll (tension member take-up means) 31,
51: optical fiber cable, 35: slot (SZ slot), 36: slot groove, 37: optical fiber ribbon (first optical fiber), 40: optical fiber Tape ribbon (second optical fiber ribbon), 57, 60...
Optical fiber ribbon (optical fiber core), 39, 5
6, 59... Gutter-like structure (optical fiber core container),
T ₁ , T ₂ ... reversal 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, Misaki, Sakura City, Chiba Prefecture Fujikura Corporation, Sakura Factory

Claims (4)

[Claims] A first optical fiber core is accommodated in a slot groove of an SZ slot, and then a second optical fiber core and an optical fiber core accommodating body accommodating the second optical fiber core are twisted by a rotating plate. A method of manufacturing an optical fiber cable in which SZ is twisted around an SZ slot on an SZ slot using the method as described above, wherein the core twisting rotating plate has an opening for inserting the SZ slot near the center. Using an optical fiber core insertion hole and an optical fiber core container insertion hole on the peripheral side from the opening, and twisting the SZ slot in which the first optical fiber core is accommodated in the slot groove. The second optical fiber core and the optical fiber core container are inserted into the opening of the rotary plate, and the optical fiber core insertion hole and the optical fiber core container of the rotary plate are respectively twisted. While inserting the SZ slot, the second optical fiber core and the optical fiber core container into the through-hole, the core twisting rotary plate is rotated according to the slot groove phase, and the second optical fiber A method for manufacturing an optical fiber cable, comprising: housing a core wire in an optical fiber core housing, and twisting the optical fiber core housing on an SZ slot. 2. A plurality of optical fiber cores and a plurality of optical fiber core containers accommodating the plurality of optical fiber cores, a plurality of optical fiber core layers are formed on a tension member using a plurality of twisted rotating plates. A method for manufacturing an optical fiber cable in which a tension member is twisted in an SZ twist form around a tension member so as to be formed, wherein the core wire twisting rotary plate has an opening for inserting a tension member near a center thereof, Using a member having an optical fiber core insertion hole and an optical fiber core container insertion hole on the peripheral side of the portion, and sequentially inserting a tension member through each opening of the plurality of core twisted rotating plates to obtain a plurality of lights. The fiber core and the optical fiber core container are inserted through the optical fiber core insertion hole and the optical fiber core container insertion hole of the plurality of core twisted rotating plates, respectively. While taking out the tension member, the optical fiber core and the optical fiber core container, one of the plurality of core twisted rotating plates positioned downstream in the tension member pulling direction is adjacent to the upstream in the pulling direction. The optical fiber is rotated in accordance with the phase of the rotating plate, the optical fiber core is accommodated in the optical fiber core housing, and the optical fiber core housing is twisted on the tension member. Fiber cable manufacturing method. 3. An SZ slot in which a first optical fiber core is accommodated in a slot groove of the SZ slot, and a second optical fiber core and an optical fiber core container accommodating the second optical fiber core are centered on the SZ slot. And a slot groove phase detecting means for detecting the phase of the slot groove of the SZ slot, and an SZ slot taking-up means for taking out the SZ slot. The plate has an opening for SZ slot insertion near the center, an optical fiber core container insertion hole and an optical fiber core insertion hole on the peripheral side from the opening, and the slot groove phase detecting means. An optical fiber cable manufacturing apparatus, which is rotatable based on a detected slot groove phase. 4. A plurality of optical fiber twisted rotating plates for twisting a plurality of optical fiber cores and a plurality of optical fiber core holders accommodating the plurality of optical fiber cores on a tension member in an SZ twist around the tension member; A tension member withdrawing means for withdrawing the tension member, wherein the core wire twisted rotary plate has an opening for inserting the tension member near the center, and an optical fiber core container insertion hole on a peripheral side from the opening. And an optical fiber core insertion hole, and among the plurality of core twisted rotating plates, the one positioned on the downstream side in the tension member picking-up direction is the core twisted rotary plate adjacent to the drawing direction upstream. An apparatus for manufacturing an optical fiber cable, which is rotatable according to a phase.