JPS6242483B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically winding a cored optical fiber around a spiral groove carved on the outer peripheral surface of a support wire.

For the purpose of protecting the optical fiber core from external forces such as crushing force, Figure 1a and Figure 1 showing its cross-sectional structure are
As shown in FIG. b, an optical cable having a structure in which an optical fiber core 3 is housed in a spiral groove 2 formed on the outer circumferential surface of a support wire 1 is known. When manufacturing an optical cable with such a structure, a bobbin in which the optical fiber core wire is wound is installed so as to be able to turn around a supporting wire that is fed in a straight line, and the optical fiber core wire that is unwound from this bobbin is supported. Since it is necessary to accurately wind the wire around the spiral groove, the bobbin must be rotated at a rotation speed that corresponds to the pitch of the spiral groove and the moving speed of the support wire. Conventionally, the rotation speed of the bobbin was adjusted by the operator while directly observing the winding state of the optical fiber core around the spiral groove of the support wire, which resulted in defective parts and reduced yield. The disadvantage is that the time required for adjustment reduces the operating rate of the device.

From the above-mentioned viewpoint, the present invention provides an apparatus that can automatically perform the precise winding operation of the optical fiber from the beginning when manufacturing an optical cable in which the optical fiber is wound into the spiral groove of the support wire. The purpose is to Moreover, this is intended to improve yield and device operating rate.

The configuration of the optical cable manufacturing apparatus of the present invention that achieves this object is such that a bobbin in which an optical fiber core wire is wound is attached to the outer circumferential surface of a cylindrical spindle that is rotatably supported on a pedestal, and the outer circumferential surface A support wire having a spiral groove carved therein is continuously moved from one end of the spindle to the other end with the support wire passing through the inside of the spindle to fit into the support wire and engage the spiral groove. A cylindrical synchronous rotor having a mating pin protruding from its inner peripheral surface is rotatably attached to one end of the spindle, and the spindle is rotated in synchronization with the rotation of the synchronous rotor as the support wire moves. A pin that guides the winding of the optical fiber core wire that is rotated and further pulled out from the bobbin and wound around the spiral groove of the support wire, and that also fits into the support wire and engages with the spiral groove is located on the inner peripheral surface. The present invention is characterized in that a cylindrical guide rotor protruding from the shaft is rotatably attached to the other end of the spindle.

Hereinafter, one embodiment of the optical cable manufacturing apparatus according to the present invention will be described in detail with reference to FIGS. 2 to 4.
As shown in the figure, a transmission pulley 14 is firmly fitted to one end of a cylindrical spindle 13 that is rotatably attached to a pedestal 12 via a bearing 11. The drive pulley 16 of the spindle drive motor 15 and the transmission pulley 14
The spindle 13 is rotated by rotating the belt 10 wound around the spindle 13. As shown in FIG. 3, which shows the cross-sectional shape of the long optical fiber core 3 in FIG. In this embodiment, since the two-core optical cable is symmetrical, the two bobbins 17
Although they are positioned 180 degrees apart, the number of bobbins 17 to be installed should be determined in accordance with the number of fibers of the optical cable. A support wire 1 made of aluminum or the like that passes through the center of the spindle 13 and has two spiral grooves 2 formed on the outer peripheral surface is a support wire feed roll 2.
By the operation of the roll drive motor 21 to which the support wire feed roll 20 is connected, the support wire 1 is wound from one end of the spindle 13 to the other end (toward the right in FIG. 2). move continuously.
A spiral groove 2 of the support line 1 is provided at one end of the spindle 13.
A cylindrical synchronous rotor 23 having a protruding pin 22 on its inner circumferential surface that engages with the bearing 24 is fitted to the support wire 1.
Since the synchronous rotor 23 cannot move in the direction of movement of the support line 1, it can rotate around the support line 1 by feeding the support line 1. do. A three-phase generator 27 including a detection gear 26 that meshes with a synchronization gear 25 formed on the synchronous rotor 23 and a slip ring 28 connected thereto are each fixed to the outer peripheral surface of one end of the spindle 13. A brush 29 that is in sliding contact with the slip ring 28 is connected to a synchronous control device 30 that controls the rotational speed of the spindle drive motor 15.

The optical fiber core wire 3 is accurately inserted into the spiral groove 2 of the support wire 1.
In order to cause the synchronization gear 2 to be wound up, it is necessary to match the rotational speeds of the synchronous rotor 23 and the spindle 13.
The drive pulley 1 of the spindle drive motor 15 is arranged so that the meshing position between the detection gear 26 and the drive pulley 1 of the spindle drive motor 15 does not change.
6, but this is the detection gear 2.
This is achieved by the three-phase generator 27 detecting the rotational direction and rotational speed of the drive pulley 16 as an electrical signal, and the synchronous control device 30 adjusting the rotational speed of the drive pulley 16 by an amount corresponding to the detection. That is, since the three-phase generator 27 functions as a phase detector, it is also possible to use a DC generator instead of the three-phase generator 27. Further, in this embodiment, the spindle drive motor 1
5 to match the rotational speeds of the synchronous rotor 23 and the spindle 13, however, the operation of the roll drive motor 21 is controlled to change the feeding speed of the support wire 1, and thereby Synchronous rotor 2
3 and the spindle 13 may be made to have the same rotational speed.

On the other hand, a bobbin 17 is provided at the other end of the spindle 13.
A cylindrical guide rotor 31 is rotatably attached via a bearing 32 to guide the winding of the optical fiber core 3 which is pulled out from the support wire 1 and wound around the spiral groove 2 of the support wire 1.
Two guide holes 34 through which the optical fiber core 3 passes are bored at 180 degrees apart from each other in a flange portion 33 formed on the outer peripheral surface of the flange portion 33 . In Figure 2 -
As shown in FIG. 4, which shows a cross-sectional shape in the direction of arrows, this guide rotor 31 is slidably fitted with the support wire 1.
A pin 35 that engages with the spiral groove 2 of the support wire 1 is protruded from the inner peripheral surface of the guide rotor 31, and the guide rotor 31 is structured so that it cannot move in the direction of movement of the support wire 1. Therefore, the guide rotor 31 rotates with respect to the support line 1 due to the feed movement of the support line 1.

In actual manufacturing, the optical fiber core wire 3 is pulled out from the bobbin 17, passed through the guide hole 34 of the guide rotor 31, wound around the support wire feed roll 20, and further wound around a winding drum (not shown). The ends of these optical fiber core wires 3 are wound by hand about one turn and fixed in the spiral groove 2 of the wire 1.
In this case, it is preferable to adjust the rotational position of the spindle 13 so that the optical fiber core 3 does not bend excessively at the guide hole 34.

Next, when the main controller 36 is operated to operate the roll drive motor 21 and the synchronous controller 30,
Since the support wire feed roll 20 starts feeding at a constant speed and is conveyed to the right in FIG.
The guide rotor 31 rotates along the helical groove 2, and the optical fiber core 3 being drawn out from the bobbin 17 is accurately wound into the helical groove 2 of the support wire 1. At the same time, the synchronous rotor 23 also rotates,
As a result, the detection gear 26 rotates and an electric signal is sent from the three-phase generator 27 to the synchronous control device 30, so the spindle drive motor 15 operates in the rotational direction and rotational speed corresponding to this electric signal. Rotate the spindle 13. The electrical signal is generated every time the rotation of the synchronous rotor 23 and the spindle 13 deviates, and the rotational speed of the spindle 13 is controlled. There is almost no turbulence and stable feeding is achieved.

As described above, according to the optical cable manufacturing apparatus of the present invention, the synchronous rotor and the guide rotor are rotated at a constant speed by using the spiral groove of the support wire, and the spindle on which the bobbin is attached is rotated integrally with them. Since its rotation is synchronized with the synchronous rotor, it is possible to automatically and accurately wind the optical fiber around the spiral groove of the support wire from the beginning, reducing yield and equipment operating rate. It is possible to plan to improve the In addition, in the above-mentioned embodiment, only an optical cable was explained, but it goes without saying that the present invention can also be applied to a cable using electric wires.

[Brief explanation of the drawing]

FIG. 1a is a front view showing the external appearance of a support wire in which two spiral grooves are formed, FIG. 1b is a cross-sectional view thereof, and FIG. The cross-sectional views, FIGS. 3 and 4 are respectively the cross-sectional views taken in the direction of the arrows in FIG.
This is a sectional view taken in the direction of arrows, and the symbols in the figure are: 1 is a support wire, 2 is a spiral groove, 3 is an optical fiber core wire, 12 is a pedestal, 13 is a spindle, 15 is a spindle drive motor, 17 is a bobbin, and 20 is a support. Line feed roll, 21 is a roll drive motor, 22,3
5 is a pin, 23 is a synchronous rotor, 25 is a synchronous gear, 26 is a detection gear, 27 is a three-phase generator, 30
31 is a guide rotor, 34 is a guide hole, and 36 is a main controller.

Claims (1)

[Claims] 1. A bobbin in which a cored optical fiber is wound is attached to the outer peripheral surface of a cylindrical spindle that is rotatably supported on a frame, and a support wire with a spiral groove carved on the outer peripheral surface is inserted into the spindle. A cylindrical member having a pin protruding from its inner circumferential surface that is fitted into the support wire and engaged with the spiral groove thereof, and is moved continuously from one end of the spindle to the other end while passing through the A synchronous rotor is rotatably attached to one end of the spindle, and the spindle is rotated in synchronization with the rotation of the synchronous rotor as the support wire moves, and is further pulled out from the bobbin to rotate the support wire in a spiral manner. A cylindrical guide rotor, which guides the winding of the optical fiber core wire to be wound around the groove and has a pin protruding from the inner peripheral surface that fits into the support wire and engages with the spiral groove, is attached to the spindle. An optical cable manufacturing device characterized in that the optical cable is rotatably attached to the other end.