JP5538478B2 - Optical fiber winding method and winding apparatus, and optical fiber manufacturing method - Google Patents

Description

  The present invention relates to an optical fiber winding method and winding apparatus, and an optical fiber manufacturing method.

In recent years, the production of optical fibers has been increasing the spinning speed and lengthening the optical fiber for the purpose of cost reduction and the like, and the bobbin used at the time of spinning has an optical fiber having a length of 100 km or more. Is often wound. For this reason, at the time of shipment of the optical fiber, the optical fiber is drawn out by a necessary length and is wound around another bobbin (so-called “rewinding”).
When the optical fiber is wound on the bobbin, the bobbin or the optical fiber is wound (moved) in the direction of the rotation axis in order to align the optical fiber on the body (see Patent Documents 1 and 2). .

FIG. 7 shows a winding device for winding an optical fiber around a bobbin.
The winding device 31 includes an optical fiber supply unit 3 that supplies the optical fiber 2 and a winder 34 that winds the optical fiber 2.
The optical fiber supply unit 3 includes a delivery bobbin 11, a take-up machine 12, a plurality of guide pulleys 13 that guide the optical fiber 2, and a dancer roller 14.
The winder 34 includes a winding bobbin 8 that winds the optical fiber 2 and a traverse mechanism 9 that reciprocates the winding bobbin 8 with respect to the optical fiber 2 in the rotation axis direction.
The traverse device 9 can align and wind the optical fiber 2 on the take-up bobbin 8 by reciprocating the take-up bobbin 8 in the rotation axis direction.

In Patent Document 1, the wire rod is wound while reciprocating the bobbin in the rotation axis direction. At that time, the position of the bobbin collar is detected by an optical sensor, and the traverse reversing operation is controlled based on the position. A method is disclosed.
In this method, when the winding speed of the optical fiber fluctuates, the optical fiber having a length corresponding to the time delay from the detection of the bobbin position to the reversing operation is excessively wound (overwinding), resulting in turbulence. There was a problem.

JP-A-5-8934 Japanese Patent Laid-Open No. 7-33326

According to the method described in Patent Document 2, the position of the buttock is detected before the optical fiber reaches the bobbin buttock, and the reversal operation is performed after a predetermined period of time has elapsed since the buttock detection. However, when the winding speed fluctuates, there is a possibility that winding disturbance may occur due to excessive or insufficient winding of the optical fiber.
If the take-up speed of the optical fiber reaches a steady state before the bobbin is reversed, the take-up speed is unlikely to fluctuate and there is no excess or deficiency in the take-up of the optical fiber near the buttocks. Since the take-up speed is increased, it is difficult to reach the steady take-up speed before reversal.
When the take-up speed is increased so as to reach the steady take-up speed before reversal, the take-up tension fluctuates due to the rotational resistance of the guide pulley, and the turbulence tends to occur.
The present invention has been made in view of the above circumstances, and even when the optical fiber winding speed fluctuates, an optical fiber winding method and a winding method that can prevent winding disturbance when the optical fiber is wound around a winding bobbin. An object of the present invention is to provide a collecting device and a method for manufacturing an optical fiber.

In order to solve the above problems, the present invention provides the following configuration.
The present invention relates to a method for winding an optical fiber on a winding bobbin having a winding drum portion and a flange portion, and at the time of winding the optical fiber, at least one of the winding bobbin and the optical fiber. A reversal command issued when the movable body has reached a reversal command position when the movable body is reciprocally traversed in the direction of the rotation axis and the movable body is traversed in a direction in which the flange portion and the optical fiber approach each other. The traverse direction of the moving body is reversed, and Δt is a time from when the moving body reaches the reverse command position to the reverse direction, and the speed of the traverse when the mobile body reaches the reverse command position Is V, and the distance in the direction of the rotation axis from the proximity position close to the flange portion to the winding position of the optical fiber becomes V · Δt. An optical fiber winding method for recognizing that a moving body has reached a reversal command position and issuing a reversal command to the moving body and reversing the traverse direction is provided.
The traverse speed may be proportional to the winding speed of the optical fiber.

  The present invention provides a method of manufacturing an optical fiber in which an optical fiber obtained by spinning is wound around a winding bobbin by the above-described optical fiber winding method.

  The present invention is an apparatus for winding an optical fiber around a winding bobbin having a winding body part and a collar part, the optical fiber supply part supplying the optical fiber, the winding bobbin, and the winding bobbin. And a traverse mechanism for reciprocally traversing the moving body, which is at least one of the optical fibers, in the rotation axis direction, a speed sensor for detecting a traverse speed of the moving body, and a position of the moving body in the rotation axis direction can be detected. A position sensor; and a control unit that adjusts the traverse speed and direction of the moving body, wherein the time from when the moving body reaches the reverse command position to reverse is Δt, and the mobile body is the reverse When the traverse speed when the command position is reached is V, the control unit traverses the moving body in a direction in which the flange portion and the optical fiber approach each other. The rotation from the proximity position close to the collar to the winding position of the optical fiber based on the traverse speed detected by the speed sensor and the position of the moving body detected by the position sensor. When the distance in the axial direction becomes V · Δt, it is recognized that the moving body has reached the reversal command position, and accordingly, a reversing command is issued to the moving body and the traverse direction is reversed. A winding device is provided.

According to the present invention, since the reversal command position is corrected according to the traverse speed, even when the winding speed is unsteady, such as the start or end of winding on the take-up bobbin, the take-up bobbin reliably The traverse direction can be reversed at a position close to the buttocks.
Therefore, even when the winding speed and the traverse speed vary, the turbulence can be prevented and the optical fiber can be wound around the winding bobbin in a good winding state.

It is a schematic block diagram which shows the winding apparatus which can implement embodiment of the winding method of the optical fiber of this invention. It is a figure which shows typically the process in which the relative position of an optical fiber and a winding bobbin changes with traverse. It is a figure which shows typically the process in which the relative position of an optical fiber and a winding bobbin changes with traverse. It is a figure which shows the time series after a winding bobbin reaches inversion command position until it inverts. It is a figure which shows typically the process in which the relative position of an optical fiber and a winding bobbin changes with traverse. It is a graph which shows the relationship between the distance of a traverse direction, and traverse speed. It is a schematic block diagram which shows an example of the conventional optical fiber winding apparatus.

(First embodiment)
FIG. 1 is a schematic configuration diagram showing a winding device 1 that can implement the first embodiment of the optical fiber winding method of the present invention.
The winding device 1 includes an optical fiber supply unit 3 that supplies the optical fiber 2, a winder 4 that winds the optical fiber 2, a traverse speed sensor 5 that detects the traverse speed of the take-up bobbin 8, and a take-up bobbin A bobbin position sensor 6 capable of detecting a position in the direction of the rotational axis 8 and a control unit 7 for adjusting the traverse speed and direction of the take-up bobbin 8.

The optical fiber supply unit 3 includes a delivery bobbin 11, a take-out machine 12 for delivering an optical fiber from the delivery bobbin 11 at a predetermined speed, a plurality of guide pulleys 13 for guiding the optical fiber 2, and the tension of the optical fiber 2. And a dancer roller 14 for adjustment.
The dancer roller 14 makes the tension of the optical fiber 2 constant by adjusting the height position when the speed of the optical fiber 2 in the winder 4 and the speed of the optical fiber 2 in the take-up machine 12 change relatively. Can keep.

The winder 4 includes a winding bobbin 8 (moving body) that winds the optical fiber 2, and a traverse mechanism 9 that reciprocates the winding bobbin 8 with respect to the optical fiber 2 in the rotation axis direction.
The winding bobbin 8 has a cylindrical winding drum 16 around which the optical fiber 2 is wound, and flanges 17 (17A, 17B) formed at both ends thereof.
The winding drum portion 16 is formed in a cylindrical shape, and the optical fiber 2 can be wound around the outer peripheral surface thereof.

The flange portion 17 is an annular plate that is substantially perpendicular to the central axis C <b> 1 of the winding drum portion 16, and is formed to extend from both ends of the winding drum portion 16 in the diameter increasing direction. The flange portion 17 has a function of preventing the optical fiber 2 to be wound from dropping from the winding body portion 16.
The take-up bobbin 8 is driven to rotate about a central axis C1 as a rotation axis by a take-up drive mechanism (not shown), which will be described later, and the optical fiber 2 is wound around the take-up body 16 in one layer or multiple layers. be able to.

The traverse mechanism 9 is inserted into the take-up drum portion 16 of the take-up bobbin 8 to support the take-up bobbin 8, the base portion 19, and the stand portion 19 so as to stand on the support drum portion 18. And a support column 20 that supports both ends.
The support body portion 18 is formed in a cylindrical shape, and a winding bobbin is formed by rotating the shaft around the axis by a winding drive mechanism (not shown) with the center axis substantially coinciding with the center axis C1 of the winding body portion 16. 8 can be rotated around the axis.
The traverse mechanism 9 can be reciprocated in the direction of the rotation axis of the support barrel 18 by a reciprocating drive mechanism (not shown), and reciprocates the take-up bobbin 8 in the direction of the central axis C1, thereby providing an optical fiber. 2 can be aligned and wound around the winding bobbin 8.

The traverse speed sensor 5 can detect the traverse speed (winding drum section 16) of the traverse mechanism 9 and send a speed detection signal to the control section 7.
As the traverse speed sensor 5, when the traverse speed of the take-up bobbin 8 is proportional to the take-up speed of the optical fiber 2, a detector (encoder or the like) built in the motor that drives the roller of the take-up machine 12 is used. can do. The traverse speed sensor 5 sends a speed detection signal corresponding to the linear speed of the optical fiber 2, and this speed detection signal is a signal corresponding to the traverse speed.
As the traverse speed sensor 5, for example, a detector incorporated in a motor used as a reciprocating drive mechanism (not shown) for reciprocating the traverse mechanism 9 may be used.

The bobbin position sensor 6 is a sensor capable of detecting the position of the take-up bobbin 8 in the rotation axis direction (left and right direction in FIG. 1), detects the position of the take-up bobbin 8 in the rotation axis direction, and outputs a position detection signal. It can be sent to the control unit 7.
As the bobbin position sensor 6, for example, a detector (encoder or the like) incorporated in a motor used as a reciprocating drive mechanism (not shown) for reciprocating the traverse mechanism 9 can be used.

  An optical sensor may be used as the bobbin position sensor. For example, an optical sensor including a light emitting part and a light receiving part positioned with respect to the guide pulley 13a can be used. This optical sensor transmits from the light receiving section to the control section 7 that the light from the light emitting section is blocked by the collar section 17 and does not reach the light receiving section when the winding bobbin 8 moves in the rotation axis direction. By detecting based on the presence or absence of a signal to be detected, the position of the take-up bobbin 8 (position of the flange portion 17) can be detected.

  Based on the speed detection signal from the traverse speed sensor 5 and the position detection signal from the bobbin position sensor 6, the control unit 7 can send a drive signal to the traverse mechanism 9 and adjust the speed and direction of the traverse mechanism 9.

Next, the first embodiment of the optical fiber winding method of the present invention will be described by taking the winding device 1 as an example.
As shown in FIG. 1, the take-up machine 12 is driven to feed the optical fiber 2 out of the bobbin 11, and while the traverse mechanism 9 reciprocates the take-up bobbin 8, the take-up drive mechanism (not shown) winds it. By rotating the take-up bobbin 8 around its axis, the optical fiber 2 is taken up on the take-up body 16 of the take-up bobbin 8.
Although the traverse speed of the take-up bobbin 8 and the take-up speed of the optical fiber 2 may be independent, the traverse speed of the take-up bobbin 8 usually depends on the take-up speed of the optical fiber 2. For example, the traverse speed of the winding bobbin 8 can be made proportional to the winding speed of the optical fiber 2.

Hereinafter, the operation of the winding device 1 when the traverse direction of the winding bobbin 8 is reversed will be described.
FIG. 2 is a diagram schematically showing a process in which the relative position between the optical fiber 2 supplied via the guide pulley 13 a and the winding bobbin 8 changes due to the traverse of the winding bobbin 8.
In this embodiment, the flange portion 17 actually approaches the optical fiber 2 by the movement of the winding bobbin 8, but in this figure, the relative position is changed so that the position of the optical fiber 2 instead of the winding bobbin 8 changes. The change is illustrated.
Reference numeral 13 a denotes a guide pulley 13 that is closest to the take-up bobbin 8, and the optical fiber 2 that has passed through the guide pulley 13 a is directly taken up by the take-up bobbin 8.

In the process of approaching the winding position of the optical fiber 2 and the flange portion 17 (17A) on one end side of the winding drum portion 16, the bobbin position sensor 6 is obtained when the winding bobbin 8 reaches a predetermined reverse command position. Detects the position of the take-up bobbin 8 and sends a position detection signal to the control unit 7.
Based on this position detection signal, the control unit 7 transmits a reverse command to the traverse mechanism 9 to reverse the traverse direction of the take-up bobbin 8.

FIG. 4 is a diagram showing a time series from when the winding bobbin 8 reaches the reverse command position to when it is reversed.
When the take-up speed of the optical fiber 2 is a steady speed and the traverse speed of the take-up bobbin 8 at that time is V0 (constant speed), the time when the take-up bobbin 8 reaches the reverse command position is t0. The time when the control unit 7 sends the reverse command to the traverse mechanism 9 is t1, and the time when the winding bobbin 8 is reversed is t2.
If the reverse command position does not depend on the traverse speed and is constant, t0 = t1 can be substantially satisfied.

The elapsed time from t0 when the take-up bobbin 8 reaches the reversal command position to t2 when the take-up bobbin 8 reverses is denoted by Δt (delay time). This delay time Δt is constant regardless of the winding speed of the optical fiber 2 and the traverse speed of the winding bobbin 8.
The delay time Δt is a time including all the steps when there are a plurality of steps from when the winding bobbin 8 reaches the reversal command position until it is reversed. For example, it includes a delay time from when the traverse mechanism 9 receives a signal until it operates.
Usually, since the traverse speed of the winding bobbin 8 depends on the winding speed of the optical fiber 2, the delay time Δt strictly depends on the winding speed, but the traverse speed is smaller than the winding speed. Therefore, it can be considered that it does not depend on the winding speed.

As shown in FIG. 2, when the winding speed of the optical fiber 2 is a steady speed (the traverse speed is V0) (see FIG. 4), the winding bobbin 8 reaches the reverse command position at t0 (winding at this time). The relative position of the optical fiber 2 with respect to the take-up bobbin 8 is indicated by phantom lines in FIG. 2 is indicated by a solid line).
In this example, the take-up bobbin 8 is reversed at a position P1 where the optical fiber 2 is close to the flange portion 17 (hereinafter referred to as a proximity position P1).
Note that “the optical fiber 2 is close to the flange portion 17” includes a case where the optical fiber 2 is separated from the flange portion 17 by a slight distance and a case where the optical fiber 2 contacts the inner surface of the flange portion 17. The distance in the axial direction between the optical fiber 2 and the flange portion 17 at the close position can be set to 10 mm or less, for example.

The distance ΔL0 in the rotation axis direction of the take-up bobbin 8 from the reverse command position to the reverse position is a product “V0 · Δt” of the traverse speed V0 and the delay time Δt (see FIG. 4).
That is, when the winding speed of the optical fiber 2 is a steady speed, the position near the distance ΔL0 from the assumed reversal position (proximity position P1) is set to the “reversal command position”, so that the proximity position P1 Can be reversed.

However, in practice, at the beginning and end of winding of the optical fiber 2 on the winding bobbin 8, it is not always possible to wind the optical fiber 2 at a steady speed. That is, the winding speed may be slower than the steady speed or faster than the steady speed.
When the winding speed is unsteady, there is a possibility that the turbulence may occur due to, for example, the inversion position being a position far away from the flange 17.

As shown in FIG. 3, for example, when the winding speed is slower than the steady speed (the traverse speed is V (<V0)), the reverse command position (FIG. 3) is set by setting the same reverse command position as in the steady speed. The moving distance of the take-up bobbin 8 from the reverse position (shown by a solid line in FIG. 3) to the reverse position (shown by an imaginary line) becomes shorter as the traverse speed is slower.
Specifically, the take-up bobbin 8 is reversed at a position before ΔL ′ (= ΔL0−V · Δt) as compared with the reversal position (proximity position P1) in the case of the steady speed, and the deviation of the reversal position is Causes turbulence.
The traverse speed V is an unsteady speed and can vary. The traverse speed V is a relative speed between the optical fiber 2 and the take-up bobbin 8.

In the winding method of the present embodiment, by employing the following method, it is possible to always reverse at a position close to the flange portion 17 of the winding bobbin 8 even at an unsteady winding speed.
When the take-up bobbin 8 reaches the reverse command position, the traverse speed V at t0 is detected by the traverse speed sensor 5 (see FIG. 1). The traverse speed sensor 5 sends a speed detection signal to the control unit 7.
On the other hand, the bobbin position sensor 6 detects the position of the take-up bobbin 8 and sends a position detection signal to the control unit 7.

As shown in FIG. 5, the control unit 7 determines that the distance ΔL (V) in the rotation axis direction from the winding position of the optical fiber 2 to the proximity position P1 is “V / V0 · When it becomes “ΔL0”, it is recognized that the take-up bobbin 8 has reached the reverse command position, and the reverse command is transmitted to the traverse mechanism 9 to reverse the traverse direction of the take-up bobbin 8.
Since ΔL0 = V0 · Δt, “V / V0 · ΔL0” is “V · Δt”.
In this method, the reverse command position is corrected according to the traverse speed by utilizing the fact that the distance until the reverse is proportional to the traverse speed (see FIG. 6).

When the traverse speed of the take-up bobbin 8 is proportional to the take-up speed, the ratio “VF / VF0” between the steady-state take-up speed VF0 and the unsteady take-up speed VF is “V / V0”. Is equal to
If the traverse speed V is equal to V0, ΔL (V) becomes ΔL0.

The winding bobbin 8 that is inverted at the position P1 where the optical fiber 2 is close to the one flange portion 17A traverses in the opposite direction (the direction in which the optical fiber 2 approaches the other flange portion 17B), and the optical fiber 2 is Inverts at a position close to 17B.
Similarly, during this reversal, when the distance from the proximity position P1 to the winding position becomes V / V0 · ΔL0 (= V · Δt), it is detected that the winding bobbin 8 has reached the reversal command position. Along with this, the control unit 7 issues an inversion command to invert the traverse direction of the take-up bobbin 8.
By repeating this process, the optical fiber 2 can be wound around the winding bobbin 8 in multiple layers.

According to the above-described optical fiber winding method, the traverse distance is proportional to the traverse speed (see FIG. 6), and the reversal command position is corrected according to the traverse speed. Even when the winding speed is unsteady, such as at the beginning or at the end of winding, the traverse direction can be reliably reversed at the position P1 close to the flange portion 17.
Therefore, even when the winding speed of the optical fiber 2 and the traverse speed of the winding bobbin 8 vary, the winding disturbance can be prevented.

(Second Embodiment)
In the first embodiment, the optical fiber 2 is taken up while traversing the take-up bobbin 8, but instead, the guide pulley 13a (moving body) can be taken up while traversing. Hereinafter, description will be made with reference to FIGS.
By reciprocating the guide pulley 13a in the direction of the rotation axis of the take-up bobbin 8, the optical fiber 2 is taken up while the take-up position of the optical fiber 2 is moved.

As shown in FIGS. 2 and 4, when the winding speed of the optical fiber 2 is a steady speed (the traverse speed is V0), the guide pulley 13a is in the process of approaching the optical fiber 2 and the flange portion 17 (17A). (Or the optical fiber 2) reaches the reversal command position at t0 (the relative position of the optical fiber 2 is indicated by a phantom line in FIG. 2), and after reversal command transmission at t1, reverses at t2 (the optical fiber at this time) 2 is indicated by a solid line in FIG. 2).
The travel distance ΔL0 of the guide pulley 13a from the reverse command position to the reverse position is the product “V0 · Δt” of the traverse speed V0 and the delay time Δt.

In the winding method of this embodiment, when the guide pulley 13a (or the optical fiber 2) reaches the reverse command position, the traverse speed V at t0 is detected by a traverse speed sensor (not shown). The traverse speed sensor sends a speed detection signal to the control unit 7.
As the traverse speed sensor, for example, a detector (encoder or the like) incorporated in a motor used as a reciprocating drive mechanism (traverse mechanism) for reciprocating the guide pulley 13a can be used.

On the other hand, the position sensor (not shown) detects the position of the guide pulley 13 a and sends a position detection signal to the control unit 7.
As the position sensor, for example, a detector built in a motor used as a reciprocating drive mechanism for reciprocating the guide pulley 13a can be used.

  As shown in FIG. 5, the control unit 7 determines that the distance ΔL (V) in the rotation axis direction from the winding position of the optical fiber 2 to the proximity position P1 is “V / V0 · When “ΔL0” (= “V · Δt”), it is recognized that the guide pulley 13a (or the optical fiber 2) has reached the reverse command position, and the reverse command is transmitted to the guide pulley 13a. Reverse the traverse direction.

According to this optical fiber winding method, similarly to the first embodiment, even when the winding speed is unsteady, the traverse direction can be reliably reversed at the position P1 close to the flange portion 17.
Therefore, it is possible to prevent the winding disturbance.

  Although the take-up bobbin 8 is traversed in the first embodiment and the guide pulley 13a is traversed in the second embodiment, both the take-up bobbin 8 and the guide pulley 13a can be traversed. That is, both the winding bobbin 8 and the guide pulley 13a are traversed in the direction in which the flange portion 17 and the optical fiber 2 approach each other, and at that time, the traverse direction is reversed by the same method as in the first and second embodiments. be able to.

In the first and second embodiments, winding (rewinding) from the delivery bobbin 11 to the winding bobbin 8 (cutting bobbin) is performed, but the winding method of the present invention is one of the optical fiber manufacturing methods. It can also be incorporated as a process.
That is, an optical fiber obtained by a known spinning method can be wound on the winding bobbin 8 by the method of the first embodiment or the second embodiment.
The shape of the take-up bobbin is not limited to the illustrated example, and the same effect can be obtained even if it is of other shapes.

Hereinafter, a specific example is shown and the effect of this invention is clarified.
Example 1
A winding device 1 shown in FIG. 1 was produced.
In this embodiment, the traverse speed of the take-up bobbin 8 is proportional to the take-up speed of the optical fiber 2.
The steady winding speed VF0 of the optical fiber 2 was set to 1200 m / min, and the reverse position of the winding bobbin 8 was set to the proximity position P1 (see FIG. 2).
The moving distance ΔL0 of the take-up bobbin 8 from the reversal command position (indicated by the phantom line in FIG. 2) to the reversal position (indicated by the solid line in FIG. 2) was 1.75 mm.
As shown in FIG. 5, when the distance ΔL (V) from the proximity position P1 to the optical fiber 2 is 1.75 × VF / 1200 [mm] (= “VF / VF0 · ΔL0”), winding is performed. It was detected that the bobbin 8 reached the reversal command position, and accordingly, the control unit 7 sent the reversal command to the traverse mechanism 9 to set the traverse direction of the take-up bobbin 8 to be reversed.
The winding speed VF of the optical fiber 2 is made slower than the steady speed VF0, the speed increasing / decreasing rate of the winding speed is 300 m / min ² , and the feeding bobbin 11 (spinning bobbin) to the winding bobbin 8 (cutting bobbin) Rewinding was performed until full winding (multilayer winding) was achieved.

The linear velocity of the optical fiber 2 at the first turn (inversion) is 300 m / min, the linear velocity at the second turn is 600 m / min, 900 m / min at the third turn, and at the fourth turn It was 1200 m / min.
When the appearance of the optical fiber 2 wound around the take-up bobbin 8 was inspected, no turbulence was found and the optical fiber 2 was in a good state.
OTDR measurement was performed on the fully wound optical fiber 2 and it was confirmed that there was no waveform disturbance due to winding disturbance or the like, and there was no problem.
When the optical fiber 2 of the winding bobbin 8 was rewound again to confirm the feeding property, there was no problem in feeding property. Moreover, when the exposed optical fiber 2 of the lower layer side was confirmed, it has confirmed that it was wound to the position P1 close | similar to the collar part 17. FIG.

(Comparative Example 1)
In this comparative example, the same reverse command position as in the case of steady speed was set. The reverse command position is fixed without depending on the winding speed.
In the same manner as in Example 1, the winding speed VF of the optical fiber 2 is made slower than the steady speed VF0 until the winding bobbin 11 (spinning bobbin) is fully wound on the winding bobbin 8 (cutting bobbin). Rewinding was performed.
When the appearance of the optical fiber 2 wound around the take-up bobbin 8 was inspected, winding disturbance was observed.
When the OTDR measurement was performed on the fully wound optical fiber 2 to confirm that there was no waveform disturbance due to winding disturbance or the like, a step in the OTDR waveform was observed in the lower optical fiber 2.
When the optical fiber 2 of the winding bobbin 8 was rewound again to check the feeding property, there was a case where feeding could not be performed smoothly.

(Comparative Example 2)
Except that the speed increase / decrease rate of the winding speed is set to 1200 m / min ² , in the same manner as in Comparative Example 1, until the winding bobbin 11 (spinning bobbin) is fully wound on the winding bobbin 8 (cutting bobbin). Rewinding was performed.
When the appearance of the optical fiber 2 wound around the take-up bobbin 8 was inspected, winding disturbance was observed.
When the OTDR measurement was performed on the fully wound optical fiber 2 to confirm that there was no waveform disturbance due to winding disturbance or the like, a step in the OTDR waveform was observed in the lower optical fiber 2.
When the optical fiber 2 of the winding bobbin 8 was rewound again to check the feeding property, there was a case where feeding could not be performed smoothly.

DESCRIPTION OF SYMBOLS 1 ... Winding device, 2 ... Optical fiber, 3 ... Optical fiber supply part, 4 ... Winding machine, 5 ... Traverse speed sensor, 6 ... Bobbin position sensor, 7 ..Control part, 8 ... Take-up bobbin, 9 ... Traverse mechanism, 13a ... Guide pulley, 16 ... Take-up drum part, 17 ... Hut part, P1 ... Proximity position ( Position close to the buttocks).

Claims (3)

A method of winding an optical fiber on a winding bobbin having a winding drum portion and a collar portion,
In winding the optical fiber, the moving body that is at least one of the winding bobbin and the optical fiber is reciprocally traversed in the rotation axis direction,
The traverse speed is proportional to the winding speed of the optical fiber,
When traversing the moving body in a direction in which the flange portion and the optical fiber approach each other, the traversing direction of the moving body is reversed by a reversing command issued when the moving body reaches a reversing command position. ,
The time from when the moving body reaches the reversal command position to reversal is Δt,
The traverse speed when the moving body reaches the reverse command position is V,
Recognizing that the moving body has reached the reversal command position when the distance in the rotation axis direction from the proximity position close to the flange portion to the winding position of the optical fiber becomes V · Δt, and accordingly An optical fiber winding method characterized by issuing a reversal command to the moving body and reversing the traverse direction. An optical fiber obtained by spinning is wound on a winding bobbin by the optical fiber winding method according to claim 1 . A device for winding an optical fiber on a winding bobbin having a winding drum portion and a collar portion,
An optical fiber supply unit that supplies the optical fiber, the take-up bobbin, a traverse mechanism that reciprocates a moving body that is at least one of the take-up bobbin and the optical fiber in a rotation axis direction; A speed sensor for detecting a traverse speed, a position sensor capable of detecting the position of the moving body in the rotation axis direction, and a controller for adjusting the speed and direction of the traverse of the moving body,
The time from when the moving body reaches the reversal command position to reversal is Δt,
The traverse speed when the moving body reaches the reverse command position is V,
The control unit makes the traverse speed proportional to the winding speed of the optical fiber, and is detected by the speed sensor when traversing the moving body in a direction in which the flange part and the optical fiber approach each other. Based on the traverse speed and the position of the moving body detected by the position sensor, the distance in the rotation axis direction from the proximity position close to the flange to the winding position of the optical fiber becomes V · Δt. In some cases, the optical fiber winding device recognizes that the moving body has reached a reversal command position, and issues a reversal command to the moving body to reverse the traverse direction.

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