JPH0833509B2 - SZ inversion twisted tape type optical fiber cable manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an SZ compose slot having a plurality of spiral grooves in which the twisting direction is reversed every predetermined length on the outer circumference, and an SZ compose slot in the spiral groove of the SZ compose slot. The present invention relates to an SZ inversion twisted tape type optical fiber cable manufacturing apparatus for manufacturing an SZ inversion twisted tape type optical fiber cable including a plurality of inserted tape type optical fibers.

(Prior Art) In a conventional tape-type optical fiber cable manufacturing apparatus, a tape-type optical fiber is composed by using a rotating eye plate that rotates only in a fixed direction and a twisting die whose inner peripheral surface is a cylindrical surface. They were assembled in the spiral groove of the slot.

(Problems to be Solved by the Invention) In the above-mentioned conventional configuration, no problem occurs when the tape-shaped optical fiber is assembled in the spiral groove of the compose slot in which the twist direction of the spiral groove is not reversed. When assembling the tape-shaped optical fiber in the spiral groove of the SZ compose slot that is reversed every predetermined length, the tape-shaped optical fiber can be successfully guided in the spiral groove at the reversal point of the twisting direction with the rotating eye plate that rotates only in a certain direction. In addition, with a twisting die with an inner peripheral surface that is a cylindrical surface, it is difficult to assemble the tape-shaped optical fiber because it does not plastically deform due to the mechanical properties of the optical fiber and the tape-shaped optical fiber tends to protrude from the spiral groove. It was

(Means for Solving the Problems) In order to solve the above problems, the apparatus for manufacturing an SZ inversion twisted tape type optical fiber cable of the present invention has a plurality of spiral grooves in which the twisting direction is inverted every predetermined length in the outer circumference. A manufacturing apparatus for manufacturing an SZ inverted twisted tape type optical fiber cable comprising an SZ compose slot and a plurality of tape type optical fibers inserted in the spiral groove of the SZ compose slot, the manufacturing apparatus comprising: A fixed eye plate that guides the plurality of tape-shaped optical fibers around the SZ compose slot to be sent, and a position around the SZ compose slot at a position downstream of the fixed eye plate in the feed direction of the SZ compose slot. A rotary eye plate that is rotatably supported by and guides the plurality of tape-shaped optical fibers; A rotatably supported unit around the SZ compose slot, and a protrusion that fits in all the spiral grooves into which the tape-shaped optical fiber is inserted in the inner periphery and holds the tape-shaped optical fiber in the spiral groove. A projecting rotary twisting die, an angle detector for detecting a rotation angle of the rotary twisting die, and a drive device for rotating the rotary eye plate according to an output signal of the angle detector. The rotational phase of the rotary eye plate is substantially matched with the rotational phase of the rotary twisting die.

(Operation) The tape type optical fiber is guided by the fixed eye plate and the rotary eye plate and inserted into the spiral groove by the rotary twisting die. Since the protruding portion of the rotary twisting die is fitted into the spiral groove, the rotary twisting die rotates following the twisting direction of the spiral groove. The angle of rotation of the rotary twisting die is detected by an angle detector, and the drive unit rotates the rotary eye plate according to the detection signal, whereby the rotational phase of the rotary eye die is almost the same as the rotational phase of the rotary eye die. Match. The tape-shaped optical fiber inserted in the spiral groove is held in the spiral groove by the protruding portion of the rotary twisting die.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 3 is a cross-sectional view of an essential part in the radial direction of an SZ inversion twisted tape type optical fiber cable manufactured by an apparatus for manufacturing an SZ inversion twisted tape type optical fiber cable in one embodiment of the present invention, where 1 is a long length. This is an SZ compose slot, and this SZ
The compose slot 1 is composed of a slot body 3 made of synthetic resin or the like having a plurality of spiral grooves 2 formed on the outer peripheral surface thereof, and a reinforcing member 4 made of a metal stranded wire or the like embedded in the center of the slot body 3. It is configured. One or a plurality of tape-shaped optical fibers 5 are inserted into some or all of the plurality of spiral grooves 2. Each spiral groove 2
Is, for example, 36 in the circumferential direction, as schematically shown in FIG.
The twisting direction is reversed every time it moves 0 degree, and the adjacent reversal points A, A
The distance between them is constant. One pitch of the spiral groove 2 is twice as long as the distance between the adjacent inversion points A, A, and the spiral groove 2 repeats the same twist pattern for each pitch. As shown in FIG. 5, the tape-shaped optical fiber 5 is composed of a plurality of optical fiber core wires 6 and a cover 7 made of synthetic resin or the like for covering the optical fiber core wires 6 and has a cross-sectional shape of almost all. It has an oval shape.

FIG. 1 is a schematic configuration diagram of an apparatus for manufacturing an SZ inverted twisted tape type optical fiber cable in one embodiment of the present invention.
Reference numeral 13 is a stand, and these stands 11, 12 and 13 are erected at appropriate intervals in the feed direction of the SZ compose slot 1 which is fed in the direction of the arrow in FIG. Has been done. A metal fixed cylinder 14 that is loosely fitted to the outer circumference of the SZ compose slot 1 is fixed to the stand 11 on the most upstream side.
A plurality of tape-shaped optical fibers 5 supplied by a supply device (not shown) are fixedly fitted with a disk-shaped fixed eye plate 15, and a plurality of rolls 16 made of fluorine resin or the like having high lubricity are provided. It is rotatably fitted. A plurality of holes 15a through which a plurality of tape type optical fibers 5 pass are formed in the fixed eye plate 15 at appropriate intervals in the circumferential direction. On the stand 12 on the downstream side of the stand 11, a rotating eye plate 18 for further guiding the plurality of tape-shaped optical fibers 5 guided by the fixed eye plate 15 is rotatably supported via a bearing 19. .. The outer periphery of this rotary eye plate 18 is fitted and fixed to the inner periphery of the bearing 19,
In addition, the inner circumference is loosely fitted to the outer circumference of the SZ compose slot 1, and a plurality of tape-shaped optical fibers 5 are provided in the radial middle part.
A plurality of holes 18a through which the holes pass are formed at appropriate intervals in the circumferential direction. A gear 20 is attached to an end portion of the rotary eye plate 18 opposite to the fixed eye plate 15 side.
Is engaged. Gear 21 is a servomotor that can rotate forward and backward
It is fitted and fixed on the outer circumference of the 22 output shafts,
Reference numeral 22 constitutes a drive device for driving the rotary eye plate 18. The stand 13 on the downstream side of the stand 12 has a rotary twist for inserting the plurality of tape-shaped optical fibers 5 guided by the rotating eye plate 18 into the plurality of spiral grooves 2 (FIG. 3) of the SZ compose slot 1. The mouth die 23 is rotatably supported via a bearing 24, and this rotary twisting die 23 is an annular body 25 fitted and fixed to the inner periphery of the bearing 24, and this ring body 25 It is constituted by a substantially cylindrical fitting body 26 that is fitted and fixed to the inner circumference and is loosely fitted to the outer circumference of the SZ compose slot 1. A gear 27 is provided at the end of the fitting 26 opposite to the rotary eye plate 18.
Is attached, and the gear 27 meshes with the gear 28. A potentiometer 30 is attached to a shaft 29 that rotatably supports the gear 28, and the potentiometer 30 constitutes an angle detector that detects the rotation angle of the rotary twisting die 23. Although not shown, the potentiometer
The output end of 30 is electrically connected to the control signal input end of the control device, and the output end of the control device is electrically connected to the power supply input end of the servomotor 22.

As shown in FIG. 2, the fitting body 26 is made of a metal and has a plurality of cylindrical portions 32 and a plurality of female threads radially formed at one end of the cylindrical portion 32 and extending in the radial direction. , And the cylindrical portion 32 is divided into two in the circumferential direction. The tip of the screw 33 is formed into a round shape and is fitted into the spiral groove 2 of the SZ compose slot 1, and the head of the screw 33 constitutes the protruding portion of the rotary twisting die 23.

Next, the operation will be described. The tape-shaped optical fiber 5 guided by the fixed eye plate 15 is further guided by the rotary eye plate 18 and inserted into the predetermined spiral groove 2 by the rotary twisting die 23. Here, since the protruding portion of the rotary twisting die 23, that is, the screw 33 of the fitting body 26 is fitted in the spiral groove 2, the rotary twisting die 23 moves along with the SZ compose slot 1 in the direction of the arrow in FIG. Then, it rotates, and the rotation direction is reversed every rotation. The rotation angle of the rotary twisting die 23 is detected by the potentiometer 30, and the servo motor 22 is driven by a control device (not shown) according to the output signal of the potentiometer 30. The servomotor 22 rotates the rotary plate 18 forward and backward through the gears 21 and 20. Therefore, the rotational phase of the rotary eye plate 18 always coincides exactly with the rotational phase of the rotary twisting die 23, and the tape type optical fiber 5 is accurately guided by the rotary eye plate 18 into the predetermined spiral groove 2. . Further, the tape-shaped optical fiber 5 inserted into the spiral groove 2 at the position of the rotary twisting die 23.
Is the protrusion of the rotary twisting die 23, that is, the screw of the fitting 26.
Since 33 is fitted in the spiral groove 2, it is securely held in the spiral groove 2 by the screw 33 and does not protrude from the spiral groove 2. In addition, a taping head (not shown) is provided on the downstream side of the rotary twisting die 23 in proximity to the rotary twisting die 23, and the outer circumference of the SZ compose slot 1 is protected by a taping head. The tape-shaped optical fiber 5 does not protrude from the spiral groove 2 on the downstream side of the twisting die 23.
Further, since the rotary eye plate 18 rotates 360 degrees, the tape-shaped optical fiber 5 between the fixed eye plate 15 and the rotary eye plate 18 abuts on the outer periphery of the roll 16, but the roll 16 is made of fluororesin having high lubricity. The tape-shaped optical fiber 5 is a roll because it is rotatably fitted to the outer circumference of the fixed barrel 14.
A large frictional force does not act on 16 and the tape type optical fiber 5 is not damaged. Further, since the projecting portion of the rotary twisting die 23 is constituted by the screw 33, the amount of fitting into the spiral groove 2 can be adjusted arbitrarily.

(Another embodiment) As the fitting body 26, as shown in FIG. 6, a protrusion 36 having a rounded tip end is provided on the inner circumference of a cylindrical portion 35 divided in two in the circumferential direction.
You may use what protruded at every suitable interval in the circumferential direction. In this case, the protrusion 36 forms the protrusion of the rotary twisting die 23.

In the fitting 26 of the rotary twisting die 23, the screw 33
Alternatively, since the protrusion 36 has both the function of rotating the rotary twisting die 23 and the function of holding the tape-shaped optical fiber 5 in the spiral groove 2, all the spirals into which the tape-shaped optical fiber 5 is inserted. It is necessary to provide the groove 2 but it is not always necessary to provide the screw 33 or the protrusion 36 for the spiral groove 2 into which the tape-shaped optical fiber 5 is not inserted.

Further, the rotational phases of the rotary eye plate 18 and the rotary twisting die 23 do not necessarily have to be exactly the same, and as long as the tape-shaped optical fiber 5 can be accurately guided to the predetermined spiral groove 2, the rotary phase is There may be a difference.

As described above, according to the present invention, since the protruding portion of the rotary twisting die is fitted in the spiral groove, the tape-shaped optical fiber can be reliably held in the spiral groove by the protruding portion. Since the tape-shaped optical fiber does not protrude from the tape-shaped optical fiber and the rotation phase of the rotary eye plate substantially matches the rotation phase of the rotary twisting die, the tape-shaped optical fiber can be accurately guided to a predetermined spiral groove, As a result, even in the spiral groove in which the twisting direction is reversed every predetermined length, the tape-shaped optical fiber can be accurately gathered in the predetermined spiral groove. Also, since the rotary eye plate is driven by the drive device, the rotational phase of the rotary eye plate is intentionally slightly shifted from the rotational phase of the rotary twisting die,
It is possible to respond precisely and flexibly according to the operating status of the device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an apparatus for manufacturing an SZ inversion twisted tape type optical fiber cable in one embodiment of the present invention, FIG. 2 is a cross-sectional view of a fitting body in a diameter direction, and FIG. 3 is an SZ inversion twisted tape type optical fiber. FIG. 4 is a cross-sectional view of the main part of the fiber cable in the radial direction, FIG. 4 is an explanatory view of the twist direction of the spiral groove, FIG. 5 is a cross-sectional view of the tape type optical fiber in the width direction, and FIG. It is a diametrical sectional view of a united body. 1 ... SZ compose slot, 2 ... spiral groove, 5 ... tape type optical fiber, 15 ... fixed eye plate, 18 ... rotary eye plate,
22 …… Servo motor (driving device), 23 …… Rotating twisting die, 30 …… Potentiometer (angle detector), 33 …… Screw (projection), 36 …… Projection (projection)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuo Imamura 4-3 Ikejiri, Itami City, Hyogo Prefecture Mitsubishi Cable Industries, Ltd. Itami Works (72) Inventor Koji Tsuji 4-3 Ikejiri, Itami City, Hyogo Mitsubishi Cable Industries, Ltd. Itami Manufacturing Co., Ltd.

Claims (1)

[Claims] 1. An SZ compose slot having a plurality of spiral grooves in which the twist direction is reversed at a predetermined length on the outer circumference, and a plurality of tape-shaped optical fibers inserted in the spiral grooves of the SZ compose slot. A manufacturing apparatus for manufacturing an SZ inverted twisted tape type optical fiber cable, wherein a fixed eye plate for guiding a plurality of the tape type optical fibers around the SZ compose slot sent in the longitudinal direction, A rotary eye plate rotatably supported around the SZ compose slot at a position downstream of the fixed eye plate in the feed direction of the SZ compose slot to guide the plurality of tape-shaped optical fibers, and the rotary eye plate. It is rotatably supported around the SZ compose slot at a position downstream of the plate in the feed direction of the SZ compose slot, and the tape-shaped optical fiber is inserted into the inner circumference. A rotary twisting die that is provided with a projecting portion that fits in all the spiral grooves and holds the tape-shaped optical fiber in the spiral groove, and an angle detector that detects the rotation angle of the rotary twisting die, A drive device for rotating the rotary eye plate according to the output signal of the angle detector is provided, and the rotational phase of the rotary eye plate is made to substantially match the rotational phase of the rotary twisting die. SZ Inversion twisted tape type optical fiber cable manufacturing equipment.