JP2806719B2 - Method and apparatus for manufacturing two-stage optical cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a plug-in type optical cable, and more particularly, to a spacer rotary feed type in which a tape ribbon is dropped into a slot at two places along a running direction of a spacer. The present invention relates to a method and apparatus for manufacturing a two-stage optical fiber cable.

[0002]

2. Description of the Related Art FIG. 3 is a cross-sectional view of a 100-fiber optical fiber cable. The optical fiber cable shown in FIG. As an apparatus for manufacturing an optical cable in which an optical fiber unit is dropped into a slot (reference numeral 1A in FIG. 2 and FIG. 3) of a synthetic resin spacer (reference numeral 1 in FIG. 2 and FIG. 3), a so-called spacer-type optical fiber cable is manufactured. Conventionally, various types are known. However, all of the conventional devices are of the type in which the tape core 10 is dropped (fitted) into the slot 1A at a single point in the running direction of the fed spacer. Reference numeral 21 denotes a water-stopping tape, reference numeral 22 denotes a polyethylene jacket, and reference numeral 1B denotes a tension member provided to extend at the center axis position of the spacer.

[0003]

However, with the recent dramatic increase in the amount of communication information, the number of tape cores is much larger than that of the 100-core optical fiber cable shown in FIG.
For example, 300-fiber optical fiber cables and the like are also manufactured, in which the number of slots 1A is 16
In many cases, the supply of the tape cores 10 to these is also complicated, so that dropping at a single point in the running direction of the spacer 1 may cause an accident such as entanglement of the tape cores 10. Improvement of the conventional device is urgent.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In order to solve the above-mentioned problems, the invention according to the first aspect of the present invention comprises a spacer fed from a rotary feeding device. Rotating the tape at a predetermined rotational speed around its own axis while winding the tape through the second dropping stage and the first dropping stage sequentially to the rotary take-up winding device; and a tape core of each of the double dropping stages. A step of feeding a predetermined number of tape cores from a wire feeder, and adjusting the take-up speed by a take-up device of the rotary take-up take-up device to set the collective dies of the first dropping stage to a predetermined large amount. Beyond
Increase or decrease the take-up speed of the spacer
Controlling the servo to return to the original neutral position, and adjusting the take-up speed of the storage type rotary take-up device between the second drop stage and the first drop stage to collect the second drop stage. A method for manufacturing a double-branch optical cable, comprising: a step of servo-controlling a die; and a step of changing and adjusting a spacer accumulation amount of the storage-type rotary take-up device in response to a change in a take-up speed by the take-up device.

The means for solving the problem according to the second aspect of the present invention is a second means which is sequentially provided at appropriate intervals along a running direction of a spacer which is sent out from a rotation sending device and taken up by a rotation take-up winding device. A dropping stage and a first dropping stage, a take-up device driven to rotate via a motor speed control device by a drive motor mounted on the rotary take-up and winding device, and a second dropping stage and the first dropping stage. A storage-type rotary take-off device that is provided between the storage devices and that is also driven to be taken off via a motor speed control device, wherein each of the dropping stages includes a tape core feeding device, a torsion detecting device of a spacer slot, and its detection. A set die adjusting device for moving the set die forward and backward in the traveling direction of the spacer in accordance with the angle of the twist, When the movement adjustment width of the collective dies by each collective die adjusting device exceeds a predetermined limit value, the takeoff speed by the take-off device and the storage type rotary take-off device is respectively changed to return each collective die to the original center position. A servo control device for performing servo control as described above, and further adjusting a spacer accumulation amount of the accumulation type rotary take-off device by a control signal of a control device of the first drop stage. Device.

[0006]

The two dropping stages share the work of dropping the tape into approximately half of the slots of the spacers, so that the tapes are all concentrated on one splitting plate or collective die. In addition, it prevents the tape cores from becoming complicated and entangled. In addition, the storage type rotary take-off device is the first type.
For the purpose of servo control to return the collective dies in the dropping stage to the original position, the fluctuation adjustment of the take-up speed of the spacer by the take-up device is prevented from reaching the dropping step of the second dropping stage.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus according to an embodiment of the present invention will be described with reference to FIG. The spacer 1 is provided with a rotation sending device 16 provided at the left end.
Is sent at a predetermined traveling speed V while being rotated around its own axis at a predetermined rotation speed N toward a rotary take-up and take-up device 17 located at the right end. A second dropping stage S2 and a first dropping stage S1 are arranged in this order in a traveling section of the spacer 1 between the rotation sending device 16 and the rotary take-up / winding device 17, and the second dropping stage S2 and the first dropping stage are arranged in this order. A storage type rotary take-up device 18 is provided between the rotary pull-down device S1 and the rotary pull-up take-up device 17 downstream of the first drop stage S1.
Is arranged.

In the present invention, the spacer 1 is fed while being rotated in the opposite direction to the winding direction of the wrapping wire of the slot 1A at the rotation speed N, and the tape core 10 is not rotated. When the pitch of the slot 1A of the spacer 1 is p and the running speed of the spacer 1 is V,
N = V. That is, because of this relationship, when viewed from the lateral direction of the spacer 1, the slot 1A looks like an oblique striped pattern when the spacer 1 is initially stationary, despite the rotation of the spacer 1. In an actual device, the rotation sending device 16 and the rotation take-up / winding device 17 are driven to rotate by the main drive shaft 15A adjusted to the rotation speed N.

The rotary take-up and take-up device 17 including the take-up device 17A and the take-up device 17B is driven to rotate by a main drive shaft 15A driven by the main motor 15. The storage type rotary take-up device 18 is a storage type spacer take-up device of a type in which a movable pulley 18B advances and retreats with respect to a fixed pulley 18A by a feed screw shaft 19 rotated by a screw shaft rotation motor 19A mounted in a frame. . The take-up drive for taking up the spacer of the rotary take-up take-up device 18 is performed by a take-up drive motor 20 mounted in the frame. The take-up device 17A in the rotary take-up take-up device 17 is for changing the traveling speed of the spacer 1 downstream thereof for the purpose of servo control of the collective die 3 of the first drop stage S1, and the storage type rotary take-up device 18 is also the same. This is for servo control of the collective die 3 of the second drop stage S2. The change in the amount of accumulation of the spacers 1 by the accumulation type rotary take-off device 18 is to prevent the change in the spacer taking-up speed by the take-up device 17A in the first dropping stage S1 from reaching the second dropping stage S2. It is.

Reference numeral 2 denotes a torsion detecting plate, which is supported by the tape core feeding device 10A so as to be rotatable within its own plate surface, and is provided with a hole through which the spacer 1 can travel and pass coaxially with its rotation axis. An engaging pawl (not shown) extending from the peripheral edge of the hole toward the center is slidably fitted in the slot 1A of the spacer 1. As described above, the point on the slot 1A travels linearly in the longitudinal direction. Therefore, unless the spacer 1 has any twist or twist, this twist detecting plate 2
Does not rotate with respect to the tape core feeder 10A.

As described above, if the spacer 1 is normal, there is no relative rotation of the twist detecting plate 2 with respect to the tape core feeding device 10, but if the spacer 1 is twisted, it rotates through the engagement pawl. The force will act. This rotation angle is enlarged by the gear device and the potentiometer 4
Is extracted as a voltage value. This voltage signal is prepared as a signal that can be easily transmitted to the processing via the rotation angle detecting device 5 and the amplifying device 6.

Then, the collective die adjusting devices 3, 7, 8, 3
1 will be described. The collective die 3 is mounted on a moving table 31, and the moving table 31 is moved forward and backward along the traveling direction of the spacer 1 by the rotation of the feed screw shaft 8. The feed screw shaft 8 is driven to rotate by a servomotor 7.
A signal is sent from the amplifying device 6 of the above-described torsion detecting device to the servomotor 7 so that the servomotor 7 is rotated at a required angle in a required direction, so that the assembly die 3 is adjusted along the longitudinal direction of the spacer 1. You will be given the necessary small distance back and forth.

The movement adjustment of the collective die 3 will now be described. If the slot 1A is twisted by an angle δ degrees in a direction to shorten the pitch of the original helix, the collective die 3 is moved upstream (see FIG. (F zone is written in 1)
The movement is adjusted by pδ / 360, and the drop position is shifted by the small distance. Of course, if it is twisted in the opposite direction, the movement adjusting direction of the collective die 3 is on the downstream side, that is, the R zone in the figure.

Next, the servo controllers 91 and 11 will be described. If the adjustment amount of the collective die 3 by the operation of the above-mentioned collective die adjusting device is small, that is, if the adjustment is made in the longitudinal direction within the range indicated as the dead zone in FIG. 1, this device does not operate, but the adjustment amount increases. Therefore, there is a danger that the moving table 31 will be out of the moving range, and it is impossible to do so as it is, so that the servo control of the collective die 3 is performed. In the example described in the previous section, it is assumed that the torsion of the spacer 1 is large in the direction of increasing the pitch, for example, and the moving table 31 of the collective die 3 has reached the end of the R zone.

In this case, the movement of the movable base 31 can be detected by an appropriate detection mark 32 such as a proximity switch. At this time, the servo control device of the collective die 3 operates. That is, a detection signal from the detection mark 32 enters the control device 91, from which a signal is transmitted to the motor speed control device 11 such as a transformer, and the number of rotations of the drive motor 17C mounted in the frame is determined. A command is issued to change it. The drive motor 17C originally operates the take-up device 17A of the rotary take-up take-up device 17 so as to take up the spacer 1 at a predetermined take-up speed V. In this example, the pitch p is increased. Since it is coming round, the direction of decreasing the pitch p may be adjusted so as to correct it, that is, adjustment may be made to decrease the take-up speed of the spacer 1.

The first drop stage S1 and the second drop stage S2 are provided with a control device 91 and a control device 92, respectively, as already described partially. The control signals from the control device 91 and the control device 92 are input to the respective motor speed control devices 11 and change the take-off speeds of the take-off device 17A and the accumulation type rotary take-off device 18 as described above. In this case, the take-off device 1
Since the increase or decrease in the take-up speed of 7A is absorbed by the increase or decrease in the amount of accumulated spacers in the accumulation type rotary take-off device 18, the servo control of the collecting dies 3 in the first drop stage S1 on the downstream side is performed in the second drop stage S2 on the upstream side. As is the case with the conventional single-stage optical cable manufacturing apparatus, reliable collective die control is performed for each dropping stage without affecting the servo control of the collective dice 3.

[0017]

According to the present invention, the operation of dropping the core wire into half of the slots can be shared by the two dropping stages S1 and S2 provided at intervals in the running direction of the spacer 1. In addition, there is an effect that the tape core 10 is prevented from concentrating on one collective die 3 and complicated or entangled. Further, the servo control of the collecting dies 3 in the first dropping stage S1 on the downstream side and the servo control of the collecting dies 3 in the second dropping stage S2 on the upstream side are performed by the accumulation type rotary take-off device 18 provided downstream of the second dropping stage S2. Has the effect of being able to reliably and independently perform the above.

[Brief description of the drawings]

FIG. 1 is a simplified side view showing an entire apparatus according to an embodiment of the present invention.

FIG. 2 is a partial perspective view illustrating a spacer.

FIG. 3 is a cross-sectional view showing an example of a 100-core optical cable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spacer 1A slot 2 Twist detection plate 3 Assembly die 31 Moving table 4 Potentiometer 5 Rotation angle detection device 6 Amplification device 7 Servo motor 8 Feed screw shaft 91,92 Controller 10 Tape core 10A Tape core feeder 11 Motor speed control Device 15 Main motor 15A Main drive shaft 16 Rotary feeding device 17 Rotary take-up and take-up device 17A Take-up device 17B Take-up device 18 Storage type rotary take-up device 18A Fixed pulley 18B Movable pulley 19 Feed screw shaft 19A Screw shaft rotary motor 20 Take-up drive motor 21 Water stop tape 22 PE jacket

Claims (2)

(57) [Claims] 1. A second drop stage (S2) while rotating a spacer (1) sent from a rotation sending device (16) around its own axis at a predetermined rotation speed.
And a step of sequentially winding through a rotary pulling and winding device (17) via a first dropping stage (S1), and a predetermined process from the respective tape core wire sending devices (10A) of the two dropping stages (S1, S2). Feeding the number of tape cores (10), and the rotary take-up and winding device (1).
The take-up speed is adjusted by the take-up device (17A) of (7), and the collective die (3) of the first drop stage (S1) is adjusted.
When the adjustment movement amount exceeds the predetermined size
In addition, the take-up speed of the spacer (1) is increased or decreased.
Therefore, the step of performing servo control so as to return to the original neutral position, and adjusting the take-up speed by the accumulation type rotary take-up device (18) between the second drop stage (S2) and the first drop stage (S1). Servo-controlling the collective die (3) of the second drop stage (S2), and the spacer accumulation amount of the accumulation type rotary take-up device (18) corresponding to the change of the take-up speed by the take-up device (17A). And a step of changing and adjusting the optical fiber. 2. A spacer (1) which is fed from a rotation sending device (16) and wound up by a rotation take-up winding device (17).
A second dropping stage (S2) and a first dropping stage (S1), which are sequentially provided at appropriate intervals along the traveling direction, and a drive motor (17C) mounted on the rotary take-up and winding device (17). The take-off device (17) which is rotationally driven via the speed control device (11)
A) and a storage type rotary take-up device (18) provided between the second drop-in stage (S2) and the first drop-in stage (S1), and also driven by a motor speed control device (11). ), And each of the dropping stages (S1, S2) is provided with a tape core feeding device (10).
A), the torsion detecting device (2, 4, 5, 6) for the slot (1A) of the spacer (1), and the collective die (3) running on the spacer (1) according to the detected torsion angle. Die adjusting device (3,7,8,
31) and the take-up device (17A) and the accumulation type rotary take-up device (18) when the movement adjustment width of the collective die (3) by each collective die adjusting device exceeds a predetermined limit value.
And a servo controller (91, 92, 11) for performing a servo control so that the respective collective dies (3) return to the original center position by respectively changing the take-up speed by the first drop stage (S1). ) Control device (91)
A spacer storage amount of said storage type rotary take-up device (18) is adjusted by the control signal of (1).