JPH095597A - Optical fiber cable manufacturing method and apparatus thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] The load applied to the optical fiber ribbon is reduced, the optical fiber ribbon inserted into the SZ groove is prevented from jumping out of the groove, and the optical fiber ribbon after being twisted The transmission efficiency of the optical fiber cable is improved by increasing the twisting speed of the optical fiber cable without increasing the transmission loss of the optical fiber cable. [Structure] In a SZ groove 2 of a grooved spacer 1 which is continuously supplied from a supply drum 3 on a traveling line, at a twisting opening, a cycle is formed along the SZ groove forming direction in accordance with an inversion angle of the SZ groove 2. When a plurality of optical fiber tape core wires 8 are guided and inserted and twisted by a winding jig 6, the windings are wound up by a winding drum 12,
Within the range of the SZ reversal angle of the SZ groove 2 of the grooved spacer 1, the twisting jig 6 is aligned with the groove forming direction of the SZ groove 2, and an arbitrary range from half the SZ reversal angle to 0 degrees. The grooved spacer 1 is rotated about the traveling direction by a predetermined angle in the direction opposite to the rotating direction of the twisting jig 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention inserts a plurality of optical fiber tape core wires into a grooved spacer having a plurality of SZ grooves on the outer peripheral surface thereof, in which the groove forming direction of a storage groove formed in a spiral shape is reversed at a constant cycle. The present invention relates to a method for manufacturing an optical fiber cable manufactured by the above method, and particularly to a method and an apparatus for manufacturing an optical fiber cable capable of improving the manufacturing speed.

[0002]

2. Description of the Related Art An optical fiber is provided with a primary coating, a secondary coating and the like to improve mechanical characteristics and easiness of handling as an optical fiber core wire. In the case of forming a cable, the optical fiber tape coated with a UV-curable resin or the like and arranged in a plurality and protected by an acrylate resin is housed in a spacer having a plurality of grooves on the outer peripheral surface, It aims to improve the characteristics, especially high reliability against lateral pressure. When the optical fiber tape core wire configured as described above is housed in the grooved spacer in which the groove is formed in a spiral shape in one direction, it is difficult to work because the optical fiber tape core wire to be connected cannot have a sufficient extra length. . Therefore, in the optical fiber ribbon, as shown in FIG. 4, the groove direction has a constant period (eg, 280 °, 360 °).
Grooved spacer 1 in which SZ groove 2 which is inverted at (°, etc.) is formed
The optical fiber tape core wire is secured in a sufficient length by taking out the optical fiber tape core by storing the optical fiber tape in an alternate manner and preventing the abnormal tension from being applied to the optical fiber.

A grooved spacer 1 in which the SZ groove 2 is formed
Conventionally, the optical fiber cable manufacturing using the is performed by an optical fiber cable manufacturing apparatus as shown in FIG. That is, as shown in FIG. 5, the grooved spacer 1 is wound around the supply drum 3 and continuously supplied on the line at a constant speed. The grooved spacer 1 supplied on this line passes through the spacer passage of the fixed eye plate 4,
It passes through the spacer passage of the rotating eye plate 5 which is rotatably held, and travels in the direction shown by the arrow A in FIG. The supply bobbin 7 fixed to the SZ groove 2 of the grooved spacer 1
Optical fiber tape core wire 8 supplied from each of A to 7F
A to 8F pass through the passage of the optical fiber tape core wire of the fixed eye plate 4 and the passage of the optical fiber tape core wire of the rotary eye plate 5, and the optical fiber tape core of the twisting jig 6 configured to be rotatable. It is inserted from the wire insertion portion (not shown).
The rotating eye plate 5 and the twisting jig 6 are adapted to rotate synchronously with the groove forming direction of the grooved spacer 1.

In this way, the grooved spacer 1 travels, and the twisting jig 6 rotates while repeating the reversal at a constant cycle along with the rotation of the rotary eye plate 5 along the groove forming direction of the SZ groove 2, and each of the SZ grooves 2 is rotated. The optical fiber ribbons 8 </ b> A to 8 </ b> F are inserted into the core and wound on the winding drum 11. In the optical fiber cable 11 using the grooved spacer 1, in order to obtain a large amount of slack in the optical fiber ribbons 8A to 8F, it is advantageous to take a large SZ inversion angle when the SZ inversion pitch is the same. Therefore, in order to secure the slack amount of the optical fiber ribbons 8A to 8F of 15 mm or more, S
Grooved spacer 1 with a large Z reversal angle (for example, 360 °)
Is used.

[0005]

In the case of the grooved spacer 1 having such a large SZ inversion angle, when the optical fiber ribbons 8A to 8F are twisted, the optical fiber tapes 8A to 8F are twisted. In order to reduce the influence of lateral pressure, the twisting jig 6 is set to a half of the reversal angle of the grooved spacer 1 (for example, 180 degrees).
The optical fiber ribbons 8A to 8F are dropped into the respective grooves of the SZ groove 2 so that the twisting jig 6 is not twisted as much as possible by repeating the inversion of the twisting jig 6. There is. When the twisting speed of the optical fiber ribbons 8A to 8F is increased, the movement of the groove forming position of the SZ groove 2 is accelerated, the reversal speed of the twisting jig 6 is increased, and the optical fiber is twisted by the twisting jig 6. The load applied to the tape core wires 8A to 8F becomes large, and the optical fiber tape core wires 8A to 8F may drop out of the groove or the transmission loss of the optical fiber tape core wires 8A to 8F after twisting may increase. However, the twisting speed of the optical fiber cable 11 cannot be increased.

An object of the present invention is to reduce the load on the optical fiber ribbon and to transmit the optical fiber ribbon after the optical fiber ribbon inserted in the SZ groove jumps out from the groove or is twisted. It is to increase the twisting speed of the optical fiber cable and increase the manufacturing efficiency of the optical fiber cable without increasing the loss.

[0007]

According to the first aspect of the present invention,
In the SZ groove of the grooved spacer that is continuously supplied from the supply drum onto the traveling line, at the twisting port, the forward and reverse angles are periodically made along the SZ groove forming direction according to the reversal angle of the SZ groove. In a method for manufacturing an optical fiber cable in which a plurality of optical fiber tape core wires are guided and inserted and twisted by a take-up drum while repeating inversion, the twist jig is used as a grooved spacer. SZ of SZ groove
Within the range of the reversal angle, S is aligned with the groove forming direction of the SZ groove.
The grooved spacer is rotated by a predetermined angle in the direction opposite to the rotation direction of the twisting jig, while rotating the grooved spacer about the traveling direction as an axis, while rotating it at an arbitrary angle within a range from 1/2 of the Z inversion angle to 0 degree. It was done like this.

According to a second aspect of the present invention, the grooved spacer is rotated by rotating the liner shaft of the grooved spacer in synchronization with the supply drum and the winding drum. Is.

According to a third aspect of the present invention, the rotation angle of the supply drum and the take-up drum is in the range of ± 40 ° to ± 1/2 of the SZ reversal angle of the grooved spacer. It is a thing.

According to a fourth aspect of the present invention, a grooved spacer having an SZ groove is continuously supplied on a line from a supply drum, and the SZ groove is twisted into the SZ groove along the SZ groove forming direction. An optical fiber in which a plurality of optical fiber ribbons are guided and inserted while they are repeatedly inverted at the same angle periodically according to the inversion angle of the groove, and the fibers are housed through a twisting jig and wound by a winding drum. In the cable manufacturing apparatus, the groove forming position of the SZ groove in which the groove forming position changes in the twisting port as the grooved spacer travels, the groove forming direction from the reference position in front of the twisting port, and the changing speed of the groove forming position And a groove detection device that detects the SZ groove of the grooved spacer detected by the groove detection device and the changing speed of the groove formation position corresponding to the changing speed of the grooved spacer. Twist to the rotational direction of the jig is provided a rotation means for a predetermined angle in the opposite direction, the twist jig within the SZ reversal angle SZ groove of the grooved spacer, S
In accordance with the groove forming direction of the Z groove, the SZ inversion angle is rotated at an arbitrary angle in the range from 1/2 to 0 degrees, and the rotating means is driven to set the grooved spacer in the traveling direction. In addition, the twisting jig is rotated in a direction opposite to the rotating direction by a predetermined angle.

According to a fifth aspect of the present invention, in the groove detection device, a pin provided on an inner peripheral surface of a ring which is fitted with the grooved spacer and is configured to be rotatable is provided with an S pin of the grooved spacer.
The SZ groove is fitted in the Z groove, and the groove forming position of the SZ groove is detected by the rotation amount of the ring that is rotated by being guided by the pin that moves in the groove forming direction of the SZ groove.

According to a sixth aspect of the present invention, the rotation of the twisting jig in accordance with the groove forming direction of the SZ groove and the changing speed of the groove forming position is projected to the inner peripheral surface of the twisting jig to cause the grooved spacer to move. The SZ groove is moved according to the change of the groove forming position of the SZ groove of the grooved spacer on which the guide pipe inserted in the SZ groove travels.
This is done by sliding in the groove.

According to a seventh aspect of the present invention, a supply drum rotating mechanism for rotating the supply means of the grooved spacer so as to rotate the supply drum in a forward and reverse direction about a traveling direction of the grooved spacer, and the winding device. The drum is constituted by a take-up drum rotating mechanism that rotates in the forward and reverse directions about the traveling direction of the grooved spacer, and the supply drum rotating mechanism and the take-up drum rotating mechanism are driven in synchronization. It is a thing.

According to an eighth aspect of the present invention, the rotation angles of the supply drum and the take-up drum are in the range of ± 40 ° to ± 1/2 of the SZ reversal angle of the grooved spacer. It is a thing.

[0015]

According to the invention of claim 1, the twisting jig is rotated at an arbitrary angle within the range of the SZ inversion angle for inserting a plurality of optical fiber ribbons into the SZ groove of the grooved spacer and twisting them together. At the same time, since the grooved spacer is rotated in the direction opposite to the rotation direction of the twisting jig, the load on the optical fiber ribbon when inserting it into the SZ groove is reduced,
The optical fiber ribbon inserted in the Z groove does not jump out of the groove or increase the transmission loss of the twisted optical fiber ribbon.

According to the second aspect of the invention, the grooved spacer is rotated by synchronizing the supply drum and the take-up drum by rotating the grooved spacer using the line shaft of the grooved spacer as a rotation axis. When the supply drum and the take-up drum are rotated, the feeding position of the grooved spacer,
The winding position can be kept constant, and the grooved spacer is not twisted.

According to the third aspect of the present invention, the rotation angle of the supply drum and the take-up drum is in the range of ± 40 degrees to ± 1/2 of the SZ reversal angle of the grooved spacer. Therefore, the load applied to the optical fiber tape core wire when it is inserted into the SZ groove is reduced, and the optical fiber tape core wire inserted into the SZ groove jumps out of the groove or is transmitted after being twisted. It is possible to prevent an increase in loss.

According to the fourth aspect of the present invention, the groove forming position of the SZ groove in which the groove forming position in the twist opening changes as the grooved spacer travels and the groove forming direction of the SZ groove is detected by the groove detecting device. And, to detect the changing speed of the groove forming position and drive the rotating means to rotate the grooved spacers by a predetermined angle in the direction opposite to the rotating direction of the twisting jig,
The load applied to the optical fiber ribbon when inserted into the SZ groove is reduced, and the transmission loss of the optical fiber ribbon after the optical fiber ribbon inserted into the SZ groove jumps out of the groove or is twisted. Never increase.

According to the fifth aspect of the invention, in the groove detecting device, the pin provided on the inner peripheral surface of the ring which is fitted with the grooved spacer and is configured to be rotatable is fitted into the SZ groove of the grooved spacer. As a result, the groove forming position of the SZ groove is detected by the rotation amount of the ring that is rotated by being guided by the pin that moves according to the groove forming direction of the SZ groove. The position can be detected.

According to the sixth aspect of the invention, the rotation of the twisting jig is projected to the inner peripheral surface of the twisting jig, and the S
Since the guide pipe inserted into the Z groove slides in the SZ groove in accordance with the change in the groove forming position of the SZ groove of the grooved spacer that runs, it does not require any special detection means. The groove changing speed and the groove forming position can be detected.

According to the seventh aspect of the present invention, since the rotating means of the grooved spacer is configured to drive the supply drum rotating mechanism and the winding drum rotating mechanism in synchronization, the grooved spacer is not twisted. It can be rotated.

According to the invention described in claim 8, the rotation angle of the supply drum and the take-up drum is in the range of ± 40 degrees to ± 1/2 of the SZ reversal angle of the grooved spacer. Therefore, the load applied to the optical fiber tape core wire when it is inserted into the SZ groove is reduced, and the optical fiber tape core wire inserted into the SZ groove jumps out of the groove or is transmitted after being twisted. It is possible to prevent an increase in loss.

[0023]

Embodiments of the present invention will be described below. FIG. 1 shows a method for manufacturing an optical fiber cable according to the present invention,
And an example of an apparatus for manufacturing an optical fiber cable is shown. In the figure, components having the same reference numerals as those shown in FIG. 5 have the same configuration and operation. This embodiment differs from the conventional example shown in FIG. 5 in that the fixed eye plate 4 is fixed to one end of the tubular body 16 and the rotary eye plate 5 is rotatably attached to the other end of the tubular body 16, and A groove detecting device 13 for detecting the groove forming direction of the attached spacer 1 and a changing speed of the groove forming position; and a supply drum rotating mechanism 14 for rotating the supply drum 3 so as to be reversible.
The point is that a winding drum rotating mechanism 15 for rotating the winding drum 12 in a reversible manner is provided.

As shown in FIG. 2, the groove detecting device 13 is fixed to the end portion of the cylindrical body 16 fixed to the wall surface of the fixed eye plate 4, and is arranged in front of the twisting jig 6. This cylinder 1
6, a cylindrical body 16 having an inner diameter equal to that of the hole 4A is fixed to the wall surface of the fixed eye plate 4, and the optical fiber ribbons 8A to 8F are provided near the outer periphery of the fixed eye plate 4. A plurality of fiber insertion holes 17A to 17F (only the fiber insertion hole 17E is shown in FIG. 2) are formed to pass through. The fiber insertion holes 17A to 17F pass through a plurality of optical fiber tape core wires 8A to 8F supplied from the supply bobbins 7A to 7F, and the fiber insertion holes 21A to 21F of the rotary eye plate 5 (in FIG. 2, Only the fiber insertion hole 21A is shown), and the grooved spacer 1 is housed in a plurality of SZ grooves 2 of the spacer 1. Further, the cylindrical body 16 which is a fixed body is formed in a cylindrical shape so that the grooved spacer 1 can travel, and the mounting flange 18 of the cylindrical body 16 is mounted.
The fixed eye plate 4 is attached to the bolt with a bolt 19. Further, the rotating eye plate 5 is rotatably attached to an eye plate attaching tool 20 fitted and fixed to the outer peripheral surface of the cylindrical body 16 via a ring-shaped bearing, and the outer peripheral surface of the cylindrical body 16 is arranged in the longitudinal direction. It is configured to be mobile. Further, the groove detecting device 13 has a circular main body 1 as shown in FIG.
3A is attached to the cylindrical body 16 with a bolt 13E, and a rotary ring 1 having a detection pin 13C on the inner peripheral surface of the main body 13A
3B is rotatably provided via a bearing. In this groove detector 13, the grooved spacer 1 is fitted in the center of the rotary ring 13B, and the detection pin 13C provided on the inner peripheral surface of the rotary ring 13B is fitted in the SZ groove 2 of the grooved spacer 1. According to the groove forming direction of the SZ groove 2, the pin 13
C and the rotating ring 13B are mounted so as to be reversed.

The rotary ring 13B has the detection pin 1
The rotation amount of the rotation ring 13B is guided by 3C, and the rotation amount of the rotation ring 13B is detected by a rotation detector 13D such as a rotary encoder (not shown) built in the main body 13A to change the groove formation direction and the groove formation position of the SZ groove 2. The speed is being detected. SZ groove 2 detected by this rotation detector 13D
Information about the groove forming direction and the changing speed of the groove forming position is supplied to the supply drum rotating mechanism 14 and the winding drum rotating mechanism 15. The twisting jig 6 provided in the subsequent stage adjacent to the groove detecting device 13 has a hole 6C for passage of the grooved spacer 1 formed in the center of the shaft, and runs in the direction shown by arrow A in FIG. The grooved spacer 1 has a diameter large enough to pass smoothly and without rattling.
Further, around the hole 6C, stainless steel guide pipes 22A to 22F are inserted and held in mounting holes (not shown). This guide pipe 22A-22F
Is for guiding the optical fiber ribbons 8A to 8F supplied from the fiber insertion holes 21A to 21F of the rotary eye plate 5 into the SZ groove 2 of the grooved spacer 1. Each of the guide pipes 22A to 22F includes a tubular portion formed in a tubular shape, and the optical fiber tape core wire 8 is provided at one end of the tubular portion.
A guide port portion formed in a funnel shape is provided so that A to 8F can be smoothly inserted. This twisting jig 6 is
A stepped portion is provided to form a large diameter portion 6A and a small diameter portion 6B having an outer peripheral diameter so that the twisting jig 6 can be easily fixed by a holder (not shown).

The tip ends of the guide pipes 22A to 22F are inserted into the SZ groove 2 of the grooved spacer 1, and the twisting jig 6 has the guide pipes 22A to 22F.
Is guided to rotate along the groove forming direction of the SZ groove 2. The movement of the twisting jig 6 twists the optical fiber tape core wires 8A to 8F supplied from the rotary eye plate 5, and the rotary eye plate 5 is rotated by the twisting force of the optical fiber tape core wires 8A to 8F.

On the other hand, the supply drum 3 which sends out the grooved spacer 1 is rotated by the supply drum rotating mechanism 14 in accordance with the changing speed of the groove forming direction and the groove forming position of the SZ groove 2 detected by the groove detecting device 13. At speed,
The inversion is repeated at a preset angle about the traveling direction of the grooved spacer 1 as an axis. Further, the winding drum 12 that winds the optical fiber cable 11 is configured to be repeatedly inverted by the winding drum rotating mechanism 15 about the traveling direction of the grooved spacer 1 as the supply drum 3.
The supply drum 3 and the take-up drum 12 are adapted to rotate in synchronization with each other at the same speed and at the same angle.
When the is rotated, the grooved spacer 1 is repeatedly inverted at a predetermined angle.

The forward / reverse angles of the supply drum 3 and the take-up drum 12 are ± 40 ° and the SZ of the grooved spacer 1 is
It is set (for example, 60 °) within the range (± 40 ° to ± 180 °) of ± 1/2 of the SZ inversion angle (for example, 360 °) of the groove 2. Supply drum 3
The forward / reverse angles of the winding drum 12 and the winding drum 12 are ± 40 ° to ± 18.
The reason for setting 0 ° is that if the minimum angle is 40 ° or less, the effect of reducing the twisting angle of the optical fiber ribbon when inserting it into the SZ groove and reducing the load on the optical fiber ribbon is sufficient. Because you can't get it. Further, the maximum angle of 180 ° is set to ± 1/2 of the maximum SZ reversal angle 360 ° of the SZ groove 2 of the grooved spacer 1 so that the optical fiber tape core when inserted into the SZ groove This is because the wire need not be twisted at all and the burden on the optical fiber tape core wire can be eliminated. Next, the operation of this embodiment will be described. Cylindrical body 1 delivered from the supply drum 3 at a constant speed and fixed to the wall surface of the fixed eye plate 4.
The grooved spacer 1 supplied to the twisting jig 6 via 6
Runs in a hole 6C formed in the axial center of the twisting jig 6. On the other hand, the plurality of optical fiber ribbons 8A to 8F supplied from the plurality of supply bobbins 7A to 7F are respectively supplied to the fiber insertion holes 17A to 17F of the fixed eye plate 4, and the fiber insertion holes 17A to 17F. After passing, the fiber insertion holes 21A of the rotating eye plate 5 facing the fixed eye plate 4
21F and the guide pipes 22A to 22F. The optical fiber ribbons 8A to 8F supplied to the guide pipes 22A to 22F are
Insertion is started into each SZ groove 2 of the grooved spacer 1 through A to 22F.

The groove forming position of the SZ groove 2 is one direction (+ direction) from the insertion position of the optical fiber ribbons 8A to 8F.
When it moves to, the groove detection device 13 detects the changing speed of the groove forming direction and the groove forming position of the SZ groove 2. This detection information is sent to the supply drum rotation mechanism 14 and the take-up drum rotation mechanism 15, and the supply drum rotation mechanism 14 and the take-up drum rotation mechanism 15 which have received this detection information are driven in synchronization, and the supply drum 3 And the take-up drum 12 in the same direction, a predetermined angle (for example, 40 °) in the direction (− direction) in which the groove forming direction and the changing speed of the groove forming position of the SZ groove 2 by the groove detecting device 13 become 0 (zero). ) Rotate to rotate the grooved spacer 1. The rotation speeds of the supply drum 3 and the winding drum 12 at this time are set to be slightly higher than the change speed of the groove forming position of the SZ groove 2. When the supply drum 3 and the winding drum 12 rotate by a predetermined angle (for example, 40 °), the supply drum rotating mechanism 14 and the winding drum rotating mechanism 15 stop the rotation drive.

While the supply drum 3 and the take-up drum 12 are rotating, the twisting jig 6 moves the guide pipes 22A to 22F.
And is rotated independently with the movement of the groove forming position of the SZ groove 2. The rotation angle of the twisting jig 6 is a relative rotation difference between the rotation angles of the supply drum 3 and the winding drum 12. When the reversal angle of the SZ groove 2 is 360 °,
When the supply drum 3 and the take-up drum 12 rotate, for example, in the direction opposite to the groove forming direction of the 40 ° SZ groove 2 (reversing direction), the twisting jig 6 causes the twisting jig 6 to form an angle half the reversing angle of the SZ groove 2. 140 ° SZ groove 2 obtained by subtracting 40 ° from (180 °) 2
It rotates in the same direction (normal direction) as the groove forming direction. After the twisting jig 6 has rotated 140 ° in the normal direction in this way, when the groove forming direction of the SZ groove 2 begins to reverse, the groove detecting device 13 causes the groove forming direction of the SZ groove 2 and the changing speed of the groove forming position. Is detected and the detection information is sent to the supply drum rotating mechanism 14 and the winding drum rotating mechanism 15. Upon receiving this detection information, the supply drum rotating mechanism 14 and the winding drum rotating mechanism 15 are driven to rotate in synchronism with each other, so that the supply drum 3 and the winding drum 12 are reversed in direction opposite to the groove forming direction of the SZ groove 2. By rotating the supply drum 3 and the winding drum 12 by a predetermined angle (for example, 40 °) in the rolling direction, the grooved spacer 1 is rotated.
To rotate. As described above, the supply drum 3 and the winding drum 12 are rotated by 40 degrees by the supply drum rotating mechanism 14 and the winding drum rotating mechanism 15 from the position where the supply drum rotating mechanism 14 and the winding drum rotating mechanism are stopped.

While the supply drum 3 and the winding drum 12 are rotating, the twisting jig 6 moves the guide pipes 22A to 22F.
And is rotated independently with the movement of the groove forming position of the SZ groove 2. That is, the rotation angle of the supply drum 3 and the take-up drum 12 is 140
The SZ groove 2 of the grooved spacer 1 is inverted after the rotation of °.

After reversing the SZ groove 2, the same operation is repeated to repeat the reversing of the supply drum 3 and the winding drum 12 and the reversing of the twisting jig 6, and the guide pipe 22.
The optical fiber tape core wires 8A to 8F are inserted into the SZ groove 2 of the grooved spacer 1 through A to 22F.

Therefore, according to this embodiment, the rotation angle of the twisting jig is reduced by rotating the supply drum and the winding drum to rotate the grooved spacer in the direction opposite to the groove forming direction of the SZ groove 2. It is possible to prevent the optical fiber tape core wire from coming off from the SZ groove when the twisting speed is increased, and to reduce the twist of the optical fiber tape core wire caused by the rotation of the twisting jig.
It is possible to suppress the lateral pressure applied to the optical fiber ribbon and prevent the transmission loss from decreasing.

The supply drum 3 and the take-up drum 12
The rotation angle of can be set arbitrarily within a range of ± 40 ° to ± 180 °. For example, in the case of using the grooved spacer 1 in which the reversal angle of the SZ groove 2 is 360 °, the supply drum 3 When the rotation angle of the winding drum 12 and the winding drum 12 is set to ± 180 °, it is not necessary to rotate the twisting jig 6 and the SZ groove 2 of the grooved spacer 1 is passed through the guide pipes 22A to 22F in a state where the twisting jig 6 does not rotate. The optical fiber ribbons 8A to 8F will be inserted therein. In this case, even if the twisting speed is increased, the optical fiber ribbon does not drop from the SZ groove at all, and the twisting jig does not rotate. Therefore, the optical fiber ribbon does not twist, and the optical fiber ribbon does not have side pressure. Therefore, the transmission loss does not decrease.

In this embodiment, the supply drum rotating mechanism 14 rotates the supply drum 3 and the winding drum rotating mechanism 15 rotates the winding drum 12 about the traveling direction of the grooved spacer 1. I am doing it. However, when the supply drum 3 is rotated around the center position of the supply drum 3, the grooved spacer 1 is displaced from the feeding position of the grooved spacer 1 from the supply drum 3 and the grooved spacer 1 is moved. Lateral pressure will be applied to 1. Similarly, when the winding drum 12 is rotated around the center position of the winding drum 12, the grooved spacer 1
The optical fiber cable 11 is in a slightly twisted state because a deviation occurs between the winding position on the winding drum 12 and the traveling position of the grooved spacer 1. Therefore, the rotation of the supply drum 3 by the supply drum rotating mechanism 14 and the rotation of the winding drum 12 by the winding drum rotating mechanism 15 are
It is preferable that the traveling line axis, which is the axial center of the grooved spacer 1, is centered. By doing so, the feeding position of the grooved spacer 1 from the supply drum 3 and the traveling position of the grooved spacer 1 coincide with each other, so that lateral pressure is not applied to the grooved spacer 1 and the winding of the grooved spacer 1 is prevented. Since the winding position on the take-up drum 12 and the running position of the grooved spacer 1 coincide with each other, the optical fiber cable 11 is not twisted.

[0036]

According to the first aspect of the present invention, the load applied to the optical fiber tape core wire when it is inserted into the SZ groove is reduced, and the optical fiber tape core wire inserted into the SZ groove pops out from the groove. , It does not increase the transmission loss of the optical fiber ribbon after twisting.

According to the second aspect of the invention, when the supply drum and the winding drum are rotated, the feeding position and the winding position of the grooved spacer can be made constant, and the grooved spacer is twisted. Never.

According to the third aspect of the invention, the load applied to the optical fiber tape core wire when it is inserted into the SZ groove is reduced, and the optical fiber tape core wire inserted into the SZ groove jumps out from the groove or twists. It is possible to prevent an increase in transmission loss of the optical fiber ribbon after it has been worn.

According to the invention described in claim 4, the load applied to the optical fiber tape core wire when it is inserted into the SZ groove is reduced, and the optical fiber tape core wire inserted into the SZ groove jumps out from the groove or twists. It does not increase the transmission loss of the optical fiber ribbon after it is damaged. According to the invention described in claim 5, the groove change speed and the groove formation position can be detected easily and accurately.

According to the invention described in claim 6, the groove changing speed and the groove forming position can be detected without using a special detecting means.

According to the invention described in claim 7, the grooved spacer can be rotated without causing twisting.

According to the invention described in claim 8, the load applied to the optical fiber tape core wire when it is inserted into the SZ groove is reduced, and the optical fiber tape core wire inserted into the SZ groove jumps out from the groove or twists. It is possible to prevent an increase in transmission loss of the optical fiber ribbon after it has been worn.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a relationship between a fixed eye plate, a rotary eye plate and a groove detection device shown in FIG.

FIG. 3 is a configuration diagram of the groove detection device shown in FIG.

FIG. 4 is an overall view of a grooved spacer having an SZ groove formed therein.

FIG. 5 is an overall configuration diagram of a conventional optical fiber cable manufacturing apparatus.

[Explanation of symbols]

1 ………………………………………… Groove spacer 2 ………………………………………… SZ groove 3 ……………………………… ……… Supply drum 4 ……………………………………………… Fixed eye plate 5 ………………………………………… Rotary eye plate 6 ……………… ……………………… Twisting jig 7A to 7F …………………………… Supply bobbin 8A to 8F …………………………… Optical fiber tape core wire 11 …… …………………………………… Optical fiber cable 12 …………………………………… Winding drum 13 …………………………………… Groove detection Device 13B ………………………………………… Rotation ring 13C …………………………………… Detection pin 13D …………………………………… Rotation detector 14 ………………………………………… Supply drum rotation mechanism 1 .......................................... winding drum rotation mechanism

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 16, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

In this way, the grooved spacer 1 travels, and the twisting jig 6 rotates while repeating the reversal at a constant cycle along with the rotation of the rotary eye plate 5 along the groove forming direction of the SZ groove 2, and each of the SZ grooves 2 is rotated. The optical fiber ribbons 8 </ b> A to 8 </ b> F are inserted into the core and wound on the winding drum 12 . In the optical fiber cable 11 using the grooved spacer 1, in order to obtain a large amount of slack in the optical fiber ribbons 8A to 8F, it is advantageous to take a large SZ inversion angle when the SZ inversion pitch is the same. Therefore, in order to secure the slack amount of the optical fiber ribbons 8A to 8F of 15 mm or more, S
Grooved spacer 1 with a large Z reversal angle (for example, 360 °)
Is used.

[Procedure amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction contents]

As shown in FIG. 2, the groove detecting device 13 is fixed to the end portion of the cylindrical body 16 fixed to the wall surface of the fixed eye plate 4, and is arranged in front of the twisting jig 6. This cylinder 1
6, a cylindrical body 16 having an inner diameter equal to that of the hole 4A is fixed to the wall surface of the fixed eye plate 4, and the optical fiber ribbons 8A to 8F are provided near the outer periphery of the fixed eye plate 4. A plurality of fiber insertion holes 17A to 17F (only the fiber insertion hole 17E is shown in FIG. 2) are formed to pass through. The fiber insertion holes 17A to 17F pass through a plurality of optical fiber tape core wires 8A to 8F supplied from the supply bobbins 7A to 7F, and the fiber insertion holes 21A to 21F of the rotary eye plate 5 (in FIG. 2, Only the fiber insertion hole 21 B is shown) and is housed in the plurality of SZ grooves 2 of the grooved spacer 1. Further, the cylindrical body 16 which is a fixed body is formed in a cylindrical shape so that the grooved spacer 1 can travel, and the mounting flange 18 of the cylindrical body 16 is mounted.
The fixed eye plate 4 is attached to the bolt with a bolt 19. Further, the rotating eye plate 5 is rotatably attached to an eye plate attaching tool 20 fitted and fixed to the outer peripheral surface of the cylindrical body 16 via a ring-shaped bearing, and the outer peripheral surface of the cylindrical body 16 is arranged in the longitudinal direction. It is configured to be mobile. Further, the groove detecting device 13 has a circular main body 1 as shown in FIG.
3A is attached to the cylindrical body 16 with a bolt 13E, and a rotary ring 1 having a detection pin 13C on the inner peripheral surface of the main body 13A
3B is rotatably provided via a bearing. In this groove detector 13, the grooved spacer 1 is fitted in the center of the rotary ring 13B, and the detection pin 13C provided on the inner peripheral surface of the rotary ring 13B is fitted in the SZ groove 2 of the grooved spacer 1. According to the groove forming direction of the SZ groove 2, the pin 13
C and the rotating ring 13B are mounted so as to be reversed.

[Procedure 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

[Fig. 2]

Claims (8)

[Claims] 1. An SZ groove of a grooved spacer continuously supplied from a supply drum onto a traveling line, with a twisting port,
A plurality of optical fiber tape core wires are guided and inserted while being repeatedly reversed at the same angle periodically in accordance with the reversal angle of the SZ groove along the SZ groove formation direction, and the optical fiber tape core wires are accommodated via a twisting jig, In the method of manufacturing an optical fiber cable wound by a winding drum, the twisting jig is aligned within the range of the SZ inversion angle of the SZ groove of the grooved spacer with the groove forming direction of the SZ groove, and the SZ inversion angle of 1 is set. It is configured such that the grooved spacer is rotated by a predetermined angle in the direction opposite to the rotation direction of the twisting jig while the grooved spacer is rotated about the traveling direction as an axis while rotating at an arbitrary angle within a range from the angle of / 2 to 0 degree. A method for manufacturing a characteristic optical fiber cable. 2. The optical fiber according to claim 1, wherein the grooved spacer is rotated by rotating the liner shaft of the grooved spacer as a rotation axis in synchronization with the supply drum and the winding drum. Cable manufacturing method. 3. The rotation angle between the supply drum and the take-up drum is an angle in a range from ± 40 degrees to ± 1/2 of an SZ reversal angle of the grooved spacer. Optical fiber cable manufacturing method. 4. A grooved spacer having an SZ groove is continuously supplied on a line from a supply drum into the SZ groove,
At the twisting port, a plurality of optical fiber ribbons are guided and inserted while being repeatedly inverted to the same angle periodically according to the reversal angle of the SZ groove along the SZ groove formation direction, and stored through a twisting jig. Then, in the optical fiber cable manufacturing apparatus which is wound up by the winding drum, the groove forming position of the SZ groove in which the groove forming position in the twisting opening changes according to the running of the grooved spacer is used as a reference in front of the twisting opening. The groove forming direction from the position and the changing speed of the groove forming position, and the groove forming direction of the SZ groove of the grooved spacer detected by the groove detecting device and the changing speed of the groove forming position. And a rotating means for rotating the grooved spacer about the running direction by a predetermined angle in a direction opposite to the rotation direction of the twisting jig.
Within the range of the SZ reversal angle of the Z groove, it is rotated to an arbitrary angle in the range from 1/2 of the SZ reversal angle to 0 degrees in accordance with the groove forming direction of the SZ groove, and the rotating means is driven. An apparatus for manufacturing an optical fiber cable is characterized in that the grooved spacer is rotated about a traveling direction as an axis in a direction opposite to a rotation direction of the twisting jig by a predetermined angle. 5. The groove detecting device is configured such that a pin provided on an inner peripheral surface of a ring that is fitted with the grooved spacer and configured to be rotatable is fitted into an SZ groove of the grooved spacer, and the S
5. The optical fiber cable manufacturing method according to claim 4, wherein the groove forming position of the SZ groove is detected by the rotation amount of the ring that is guided and rotated by the pin that moves in the groove forming direction of the Z groove. apparatus. 6. The rotation of the twisting jig according to the groove forming direction of the SZ groove and the changing speed of the groove forming position is projected into the inner peripheral surface of the twisting jig and inserted into the SZ groove of the grooved spacer. 6. The optical fiber cable manufacturing apparatus according to claim 4, wherein the guide pipe is slid in the SZ groove in accordance with a change in the groove forming position of the SZ groove of the grooved spacer. 7. The rotating means of the grooved spacer comprises a supply drum rotating mechanism for rotating the supply drum so as to be reversible about the traveling direction of the grooved spacer, and a take-up drum for the grooved spacer. 5. A winding drum rotating mechanism that rotates in the forward and reverse directions about the traveling direction of the winding drum, and the supply drum rotating mechanism and the winding drum rotating mechanism are driven in synchronization. 5. The optical fiber cable manufacturing apparatus according to 5 or 6. 8. The light according to claim 7, wherein the rotation angle between the supply drum and the take-up drum is in the range of ± 40 degrees to ± 1/2 of the SZ inversion angle of the grooved spacer. Fiber cable manufacturing equipment.