Device for winding wire body and method for winding wire body

Abstract

This device for winding a wire body comprises a bobbin for winding a wire body, a winding machine for rotating the bobbin, and a guide roller for guiding the wire body to the bobbin, wherein: the bobbin moves in a reciprocating manner relative to the guide roller along an axial direction of the bobbin; the winding device furthermore comprises a processing device for controlling an inversion position of relative movement of the bobbin with respect to the guide roller; and the processing device performs both feedforward control for moving the inversion position on the basis of the rotation speed of the bobbin and feedback control for moving the inversion position on the basis of the winding diameter of the bobbin.

Description

Wire winding device and wire winding method

[0001] This application claims priority to Japanese Patent Application No. 2024-061219, filed April 5, 2024, and incorporates by reference all of the contents of said Japanese application.

[0002] Conventionally, techniques relating to winding devices and winding methods for wires such as optical fibers have been developed. For example, Patent Document 1 discloses a wire winding method in which the displacement of a dancer roller placed in front of a winding machine that winds the wire from a reference position is monitored and fed back to determine the traverse reversal position of the wire and the bobbin.

[0003] Japanese Patent Application Publication No. 2003-341932

[0004] The wire winding device of the present disclosure is a wire winding device comprising a bobbin for winding the wire, a winding machine for rotating the bobbin, and a guide roller for guiding the wire to the bobbin, wherein the bobbin moves back and forth relative to the guide roller along the axial direction of the bobbin, and the winding device further comprises a processing device for controlling a reversal position of the relative movement of the bobbin with respect to the guide roller, and the processing device performs both feedforward control for moving the reversal position based on the rotation speed of the bobbin and feedback control for moving the reversal position based on the winding diameter of the bobbin.

[0005] The disclosed method for winding a wire is a winding method for a wire winding device including a bobbin for winding the wire, a winding machine for rotating the bobbin, and a guide roller for guiding the wire to the bobbin, wherein the bobbin moves back and forth relative to the guide roller along the axial direction of the bobbin, and the winding method includes a step of performing feedforward control to move a reversal position of the relative movement of the bobbin with respect to the guide roller based on the number of rotations of the bobbin, and a step of performing feedback control to move the reversal position based on the winding diameter of the bobbin.

[0006] Fig. 1 is a diagram showing the overall configuration of a wire winding device according to an embodiment of the present disclosure. Fig. 2 is a diagram showing the winding bobbin shown in Fig. 1 as viewed from the direction of arrow Y. Fig. 3 is a block diagram showing the configuration of the processing device shown in Fig. 1. Fig. 4 is a diagram for explaining a method for calculating the winding diameter of the winding bobbin by an arithmetic processing unit of the processing device shown in Fig. 3. Fig. 5 is a graph showing the relationship between the reversal position of the winding bobbin shown in Fig. 1 and the traverse speed of the winding bobbin. Fig. 6 is a graph showing the relationship between the reversal position of the winding bobbin shown in Fig. 1 and the winding density of the winding bobbin. Fig. 7 is a graph showing an example of the relationship between the rotation speed of the winding bobbin shown in Fig. 1 and the distance from the reference position to the reversal position of the winding bobbin.

[0007] [Problem to be Solved by the Invention] However, when the traverse reversal position is determined based on the displacement of the dancer rollers, as in the winding method described in Patent Document 1, it takes time for the effect to have an effect on the winding diameter of the bobbin that winds the wire, and therefore it may be difficult to make the winding diameter of the wire around the bobbin uniform.

[0008] An object of the present disclosure is to provide a wire winding device and a wire winding method that are capable of performing control to make the winding diameter of the bobbin more uniform.

[0009] Effect of the Invention According to the present disclosure, it is possible to perform control to make the winding diameter of the bobbin more uniform.

[0010] [Explanation of Embodiments of the Present Disclosure] First, the contents of the embodiments of the present disclosure will be listed and described. The present disclosure provides a wire winding device including: (1) a bobbin for winding a wire; a winding machine for rotating the bobbin; and a guide roller for guiding the wire to the bobbin, wherein the bobbin moves back and forth relative to the guide roller along the axial direction of the bobbin; the winding device further includes a processing device for controlling a reversal position of the relative movement of the bobbin with respect to the guide roller, and the processing device performs both feedforward control for moving the reversal position based on the number of rotations of the bobbin and feedback control for moving the reversal position based on the winding diameter of the bobbin.

[0011] In this way, by combining two types of control to control the reversal position of the relative movement of the bobbin with respect to the guide roller, it is possible to make the winding diameter of the bobbin more uniform.

[0012] (2) In the wire winding device of (1) above, the processing device may calculate the winding diameter of the bobbin based on the relative moving speed of the bobbin with respect to the guide roller, the number of rotations of the bobbin, and the winding speed of the wire in the feedback control.

[0013] In this way, by using the relative moving speed of the bobbin with respect to the guide roller, the number of rotations of the bobbin, and the winding speed of the wire, it is possible to calculate the winding diameter of the bobbin while the wire is being wound.

[0014] (3) In the wire winding device of (2) above, the processing device may control the reversal position based on the newly calculated winding diameter and the winding diameter at the center of the axial direction of the bobbin.

[0015] As described above, the wire winding device according to the present disclosure can calculate the winding diameter of the bobbin while the wire is being wound, and therefore the distribution of the winding diameter in the axial direction of the bobbin can be updated in real time. Therefore, based on the distribution of the winding diameter, it is possible to eliminate bulges or depressions in the wire near the flange of the bobbin and perform control to make the winding diameter of the bobbin more uniform.

[0016] (4) In the wire winding device of any one of (1) to (3) above, the processing device may obtain a graph showing the relationship between the square of the rotation speed of the bobbin and the reversal position, calculate coefficients of an equation for an approximate straight line of the graph, and determine the reversal position using the coefficients and the rotation speed in the feedforward control.

[0017] In this way, in the feedforward control, by determining the bobbin reversal position using the equation of the approximate straight line that serves as a model, the feedforward control can be performed easily and quickly.

[0018] The presently disclosed method for winding a wire is (5) a winding method for a wire winding device including a bobbin for winding the wire, a winding machine for rotating the bobbin, and a guide roller for guiding the wire to the bobbin, wherein the bobbin moves back and forth relative to the guide roller along the axial direction of the bobbin, and the winding method includes the steps of: performing feedforward control to move a reversal position of the relative movement of the bobbin with respect to the guide roller based on the number of rotations of the bobbin; and performing feedback control to move the reversal position based on the winding diameter of the bobbin.

[0019] In this way, by combining two types of control and controlling the reversal position of the relative movement of the bobbin with respect to the guide roller, it is possible to make the winding diameter of the bobbin uniform.

[0020] [Details of the embodiment of the present disclosure] Specific examples of a winding device for a wire body according to an embodiment of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. In addition, the scale of each drawing used in the following description has been appropriately changed to make each component recognizable.

[0021] (Overall Configuration of Winding Device) Fig. 1 is a diagram showing the overall configuration of a wire winding device 100 according to an embodiment of the present disclosure. Fig. 2 is a diagram showing the winding bobbin 20 shown in Fig. 1 as viewed from the direction of arrow Y.

[0022] Here, a description will be given of a winding device 100 for an optical fiber 1, which is an example of a filament. As shown in Fig. 1, the winding device 100 includes a supply unit 10, a plurality of capstans 11, a plurality of dancer rollers 12, a plurality of guide rollers 13, a winding motor 14, a first detector 15, a traverse motor 16, a second detector 18, a winding bobbin 20, and a processing device 30.

[0023] In the winding device 100, the optical fiber 1 drawn out from the supply section 10 is wound onto the winding bobbin 20 via a plurality of capstans 11, a plurality of dancer rollers 12, and a plurality of guide rollers 13 that guide the optical fiber 1 to the winding bobbin 20.

[0024] 2, the winding bobbin 20 has a cylindrical body 21 around which the optical fiber 1 is wound, and two disk-shaped flanges 22A and 22B provided on both ends of the body 21. The winding bobbin 20 is driven to rotate by a winding motor (winder) 14 shown in FIG.

[0025] 1 , the first detector 15 connected to the rotation shaft of the winding motor 14 detects the rotation speed ft of the winding bobbin 20. When the first detector 15 detects the rotation speed ft of the winding bobbin 20, it outputs data indicating the detected rotation speed ft to the processing device 30. Note that the rotation speed ft of the winding bobbin 20 is controlled by the processing device 30, for example, based on the vertical position of the dancer roller 12, as will be described later.

[0026] The winding bobbin 20 is driven and moved by a traverse motor 16 controlled by the processing device 30. More specifically, the winding bobbin 20 moves back and forth along the axial direction of the winding bobbin 20 at a predetermined traverse speed (movement speed) Vtrv relative to the guide roller 13, as shown in FIG.

[0027] 1 may be connected to a guide roller 13 (hereinafter referred to as a "guide roller 13A") located closest to the take-up bobbin 20 in the travel path of the optical fiber 1, instead of being connected to the take-up bobbin 20. In this case, the guide roller 13A is driven by the traverse motor 16 to move along the axial direction of the take-up bobbin 20 at a predetermined traverse speed Vtrv relative to the take-up bobbin 20.

[0028] A second detector 18 is connected to the guide roller 13A to detect the number of rotations of the guide roller 13A. When the second detector 18 detects the number of rotations of the guide roller 13A, it outputs data indicating the detected number of rotations to the processing device 30.

[0029] (Configuration of Processing Device) (a) Calculation of Winding Diameter of Winding Bobbin Fig. 3 is a block diagram showing the configuration of the processing device 30 shown in Fig. 1. As shown in Fig. 3, the processing device 30 includes an acquisition unit 31, an arithmetic processing unit 32, a storage unit 33, and a control unit 34.

[0030] 1 . More specifically, when the acquiring unit 31 acquires data indicating the rotation speed ft of the winding bobbin 20 from the first detector 15, the acquiring unit 31 outputs the acquired data to the calculation processing unit 32. When the acquiring unit 31 acquires data indicating the rotation speed of the guide roller 13A from the second detector 18, the acquiring unit 31 outputs the acquired data to the calculation processing unit 32.

[0031] When the calculation processing unit 32 receives data indicating the rotation speed of the guide roller 13A from the acquisition unit 31, it acquires the winding speed Vt of the optical fiber 1 on the guide roller 13A by using the rotation speed of the guide roller 13A and the diameter of the guide roller 13A that is pre-stored in the memory unit 33.

[0032] Specifically, the calculation processing unit 32 calculates the linear speed of the optical fiber 1 on the guide roller 13A by multiplying the number of rotations of the guide roller 13A by the circumferential length of the guide roller 13A (=π×diameter of the guide roller 13).The calculation processing unit 32 then uses the calculated linear speed as the winding speed Vt of the optical fiber 1 around the winding bobbin 20 in a calculation described below.

[0033] In this way, the calculation processing unit 32 calculates the linear speed of the wire at the guide roller 13A, i.e., the linear speed of the optical fiber 1 just before it is wound onto the winding bobbin 20, thereby making it possible to more accurately obtain the winding speed Vt of the optical fiber 1.

[0034] In addition, the calculation processing unit 32 calculates the winding diameter D of the winding bobbin 20 based on the traverse speed Vtrv of the winding bobbin 20, the rotation speed ft of the winding bobbin 20 indicated by the data output from the first detector 15, and the winding speed Vt of the optical fiber 1.

[0035] 4 is a diagram for explaining a method for calculating the winding diameter D of the winding bobbin 20 by the calculation processing unit 32 of the processing device 30 shown in FIG. 3. As shown in FIG. 4, the traverse speed Vtrv (m / s) of the winding bobbin 20, the rotation speed ft (s －１ ), the winding speed Vt (m / s) of the optical fiber 1, and the winding diameter D (m) of the winding bobbin 20 satisfy the relationship of the following equation (1) according to Pythagorean theorem of velocity.

[0036] (winding speed) ２ = (winding circumferential speed) ２ + (winding speed in the longitudinal direction) ２

[0037] The calculation processing unit 32 shown in Figure 3 can calculate the winding diameter D of the winding bobbin 20 as shown in the following equation (2) by using the traverse speed Vtrv of the winding bobbin 20, the rotation speed ft of the winding bobbin 20, and the winding speed Vt of the optical fiber 1 based on the above equation (1).

[0038]

[0039] (b) Modified example of method for obtaining winding speed of optical fiber The calculation processing unit 32 in the processing device 30 is not limited to a configuration in which the winding speed Vt of the optical fiber 1 used to calculate the winding diameter D is calculated as the linear speed of the optical fiber 1 on the guide roller 13A.

[0040] For example, the calculation processing unit 32 may calculate the linear speed VL of the optical fiber 1 controlled by the capstan 11 (see Figure 1) arranged upstream of the guide roller 13, and use the calculated linear speed VL as the winding speed Vt of the optical fiber 1 to calculate the winding diameter D.

[0041] Specifically, a detector (not shown) that detects the rotation speed of the capstan 11A is connected to the capstan 11 (hereinafter referred to as "capstan 11A") located furthest downstream among the multiple capstans 11. Upon detecting the rotation speed of the capstan 11A, the detector outputs data indicating the detected rotation speed to the processing device 30.

[0042] When the acquisition unit 31 in the processing device 30 acquires data indicating the rotation speed of the capstan 11A, the acquisition unit 31 outputs the acquired data to the calculation processing unit 32.

[0043] When the calculation processing unit 32 receives data indicating the rotation speed of the capstan 11A from the acquisition unit 31, it calculates the linear speed of the optical fiber 1 running on the capstan 11A by multiplying the rotation speed of the capstan 11A by the circumferential length of the capstan 11A (=π×diameter of the capstan 11A).The calculation processing unit 32 can then use the calculated linear speed as the winding speed Vt of the optical fiber 1 around the winding bobbin 20 to calculate the winding diameter D.

[0044] Here, when the running speed of the optical fiber 1 on the guide rollers 13 is used as the winding speed Vt of the optical fiber 1, there is a possibility that the optical fiber 1 may come off the groove bottom of the guide rollers 13 due to reasons such as vibration of the optical fiber 1. In such a case, it is not possible to obtain an accurate winding speed Vt of the optical fiber 1.

[0045] In contrast, the optical fiber 1 traveling on the capstan 11 is in close contact with the capstan 11 by a capstan belt (not shown) or the like, and is therefore less likely to experience linear vibration. Therefore, by calculating the linear speed VL of the optical fiber 1 traveling on the capstan 11 as described above, the winding speed Vt of the optical fiber 1 can be obtained more stably.

[0046] 1 , when the dancer roller 12 is provided between the capstan 11A and the guide roller 13, the linear velocity VL of the optical fiber 1 running on the capstan 11A may change downstream of the dancer roller 12. For this reason, the method of using the linear velocity VL of the optical fiber 1 running on the capstan 11A in calculating the take-up speed Vt is more effective when the dancer roller 12 is not provided between the capstan 11A and the guide roller 13.

[0047] 1 and 3, the vertical position of the dancer roller 12A, which is located furthest downstream among the plurality of dancer rollers 12, is detected by a sensor (not shown), and data indicating the detected position of the dancer roller 12A is transmitted to the processing device 30. Upon acquiring the data, the acquiring section 31 in the processing device 30 outputs the acquired data to the control section 34. Then, the control section 34 controls the rotation speed ft of the winding bobbin 20 based on the vertical position of the dancer roller 12 indicated by the data.

[0048] More specifically, when the dancer roller 12 moves upward, the control unit 34 determines that the rotation speed ft of the winding bobbin 20 is fast, and controls the winding bobbin 20 to decrease. On the other hand, when the dancer roller 12 moves downward, the control unit 34 determines that the rotation speed ft of the winding bobbin 20 is slow, and controls the winding bobbin 20 to increase.

[0049] In this way, the rotation speed ft of the winding bobbin 20 is controlled based on changes in the vertical position of the dancer roller 12 (hereinafter referred to as "dancer control"), whereby the rotation speed ft of the winding bobbin 20 can be appropriately controlled.

[0050] (c-2) Control of the reversal position of the winding bobbin (part 1: feedback control) The processing device 30 further controls the reversal position of the relative movement of the winding bobbin 20 with respect to the guide roller 13A based on the winding diameter D of the winding bobbin 20 calculated by the calculation processing unit 32, so that the winding diameter D is uniform throughout the body 21 of the winding bobbin 20. This type of control by the processing device 30 is referred to as "feedback control."

[0051] That is, the control unit 34 controls the reversal position so that the winding diameter D near the flanges 22A and 22B of the winding bobbin 20 matches the winding diameter D at a position away from the flanges 22A and 22B on the body 21, specifically at the center of the axial direction of the winding bobbin 20.

[0052] For example, the calculation processing unit 32 constantly calculates the winding diameter D of the winding bobbin 20, thereby updating the distribution of the winding diameter D in real time. Then, based on the distribution of the winding diameter D, the calculation processing unit 32 averages the winding diameter D(x) in a predetermined range including the vicinity of the center in the axial direction of the body portion 21, and acquires the result as the winding diameter D at the center of the body portion 21, i.e., the target value Dr of the winding diameter.

[0053] As described above, the calculation processing unit 32 can update the distribution of the winding diameter D in real time, and therefore can update the target value Dr of the winding diameter during the period in which the optical fiber 1 is wound within the predetermined range. The calculation processing unit 32 then periodically outputs the latest winding diameter D (hereinafter referred to as the "current winding diameter D") and the updated target value Dr to the control unit 34.

[0054] When the control unit 34 acquires the current winding diameter D and the target value Dr, it determines the reversal position of the winding bobbin 20 based on the current winding diameter D and the target value Dr. For example, when the current winding diameter D is smaller than the target value Dr, the control unit 34 determines the reversal position so that the reversal position is closer to the flange 22A or flange 22B side. On the other hand, when the current winding diameter D is larger than the target value Dr, the control unit 34 determines the reversal position so that the reversal position is closer to the center of the body 21.

[0055] Furthermore, the control unit 34 may perform control based on the current winding diameter D and the target value Dr, as shown in equation (3), so that the winding diameter D approaches the target value Dr even more.

[0056] Specifically, as shown in FIG. 2 , a point located outside the flange 22B in the axial direction of the winding bobbin 20 is defined as the reference position. The distance from the reference position of the winding bobbin 20 to the reversal position is defined as "L" (m). The control unit 34 may determine the reversal position of the winding bobbin 20 so that the distance L is proportional to the sum of the difference ΔD (=Dr-D) between the current winding diameter D (m) and the target value Dr (m), the value obtained by integrating the difference ΔD with respect to time (s) and dividing the result by the integral time Ti (s), and the value obtained by differentiating the difference ΔD with respect to time (s) and multiplying the result by the differential time Td (s). In equation (3), "dL" (m) is the amount of change in "L," and "k1" (dimensionless) is a coefficient.

[0057]

[0058] 1 so that the moving direction of the winding bobbin 20 is reversed at the determined reversal position. As a result, the winding bobbin 20 reverses its moving direction at the reversal position determined by the control unit 34. As a result, the newly calculated winding diameter D approaches the target value Dr.

[0059] Similarly, when the guide roller 13A moves back and forth relative to the winding bobbin 20 instead of the winding bobbin 20, the control unit 34 can determine the reversal position of the movement direction of the guide roller 13A by the above-described feedback control. In this case, the control unit 34 outputs a control signal to the traverse motor 16 that controls the drive of the guide roller 13A so that the movement direction of the guide roller 13A is reversed at the determined judgment position.

[0060] As described above, the winding device 100 can calculate the winding diameter D of the winding bobbin 20 while winding the optical fiber 1, and can therefore update the distribution of the winding diameter D in real time. Therefore, in feedback control, the reversal position of the winding bobbin 20 can be more appropriately controlled, and the optical fiber 1 can be wound uniformly around the winding bobbin 20.

[0061] Furthermore, since the parameters for stabilizing the winding state of the winding bobbin 20 can be acquired quickly, the position of the dancer roller 12A is stabilized, and the winding tension of the optical fiber 1 can be stabilized.

[0062] (c-3) Control of the reversal position of the winding bobbin (part 2: feedforward control) The processing device 30 further controls the reversal position of the relative movement of the winding bobbin 20 with respect to the guide roller 13A based on the rotation speed ft of the winding bobbin 20. This type of control by the processing device 30 is referred to as "feedforward control." Details of the feedforward control by the processing device 30 will be described below.

[0063] (i) Relationship between reversal position and rotation speed of winding bobbin Fig. 5 is a graph showing the relationship between the reversal position of the winding bobbin 20 shown in Fig. 1 and the traverse speed Vtrv of the winding bobbin 20. Fig. 6 is a graph showing the relationship between the reversal position of the winding bobbin 20 shown in Fig. 1 and the winding density (dN / dx) of the winding bobbin 20. In the graph shown in Fig. 5, the horizontal axis represents the distance L from the reference position in the axial direction of the winding bobbin 20, and the vertical axis represents the traverse speed Vtrv. In the graph shown in Fig. 6, the horizontal axis represents the distance L from the reference position in the axial direction of the winding bobbin 20, and the vertical axis represents the winding density (dN / dx).

[0064] 4 to 6, the number of revolutions ft of the winding bobbin 20, the traverse speed Vtrv of the winding bobbin 20, and the winding density (dN / dx) (m －１ ) is a relationship as shown in the following formula (4).

[0065]

[0066] Furthermore, near the center of the axial direction of the winding bobbin 20, if the distance that the optical fiber 1 separates per one rotation of the winding bobbin 20 is defined as "pitch p" (m) (see Figure 4), the relationships shown in the following equations (5) and (6) hold.

[0067]

[0068]

[0069] In the diagram shown in Fig. 5, the position at a distance L0 from the reference position is assumed to be the center of the winding bobbin 20. Fig. 5 also shows that the reversing operation of the winding bobbin 20 starts at a position at a distance L2 from the reference position, and ends at a position at a distance L1 from the reference position. In other words, the position at distance L1 is the reversing position of the winding bobbin 20. Fig. 5 also shows that the reversing operation of the winding bobbin 20 starts at a position at a distance L3 from the reference position, and ends at a position at a distance L4 from the reference position. In other words, the position at distance L4 is the reversing position of the winding bobbin 20.

[0070] In this case, while the take-up bobbin 20 moves from the position at distance L2 to the position at distance L1, the absolute value of the traverse speed Vtrv gradually decreases, and the traverse speed Vtrv becomes zero at the position at distance L1. Also, while the take-up bobbin 20 moves from the position at distance L3 to the position at distance L4, the absolute value of the traverse speed Vtrv gradually decreases, and the traverse speed Vtrv becomes zero at the position at distance L4.

[0071] In this way, during the time when the absolute value of the traverse speed Vtrv of the winding bobbin 20 gradually decreases, that is, during the deceleration time Δt from the start to the end of the reversing operation, the winding density of the winding bobbin 20 increases as shown in Figure 6. The deceleration time Δt (s), the traverse speed Vtrv0 (m / s) of the winding bobbin 20 at the start of the reversing operation, and the acceleration a (m / s) of the winding bobbin 20 ２ ) has a relationship as shown in the following formula (7).

[0072]

[0073] Furthermore, if the number of turns of the optical fiber 1 wound around the take-up bobbin 20 during the deceleration time Δt is "ΔN", then the relationship shown in the following equation (8) holds.

[0074]

[0075] Here, the winding density (dN / dx) near the flanges 22A and 22B of the winding bobbin 20 is set to dN / dx (center) = p－１ ), the distance ΔL (m) between the reversal position of the take-up bobbin 20 and the flanges 22A and 22B needs to satisfy the formulas (9) and (10). In the formula (10), "VL" (m / s) is the linear velocity of the optical fiber 1, and "D" (m) is the take-up diameter of the take-up bobbin 20.

[0076]

[0077]

[0078] As shown in the formula (10), the winding density (dN / dx) near the flanges 22A and 22B of the winding bobbin 20 is －１ ), the greater the winding diameter D of the winding bobbin 20, the smaller the distance ΔL needs to be. In other words, the greater the winding diameter D of the winding bobbin 20, the closer the reversal position of the winding bobbin 20 needs to be to the flange 22A or the flange 22B.

[0079] By bringing the reversal position of the winding bobbin 20 closer to the flange 22A or 22B, it is possible to widen the space for winding the optical fiber 1 near the flanges 22A and 22B, where the winding density tends to increase, as shown in Fig. 6. As a result, it is possible to make the winding density uniform over the entire body 21 of the winding bobbin 20.

[0080] (ii) Obtaining a graph showing the relationship between the square of the rotation speed of the winding bobbin and the reversal position Fig. 7 is a graph G1 showing an example of the relationship between the rotation speed ft of the winding bobbin 20 shown in Fig. 1 and the distance L from the reference position to the reversal position of the winding bobbin 20. In Fig. 7, the horizontal axis represents the square of the rotation speed ft of the winding bobbin 20, and the vertical axis represents the distance L from the reference position to the reversal position of the winding bobbin 20.

[0081] The graph G1 shown in FIG. 7 can be obtained, for example, by using the rotation speed ft of the winding bobbin 20 used to calculate the winding diameter D in the above-described feedback control and the reversal position of the winding bobbin 20 determined by feedback control.

[0082] More specifically, as shown in the above formula (2), the longer the winding time, i.e., the greater the winding diameter D of the winding bobbin 20, the smaller the rotation speed ft of the winding bobbin 20. For this reason, for example, starting from point St shown in Fig. 7, a graph G1 can be obtained by plotting multiple points at positions where the square of the rotation speed ft becomes smaller and the distance L becomes larger as the winding time passes.

[0083] Then, by applying the least squares method to this graph G1, an approximate line G2 can be obtained. The equation (11) representing the approximate line G2 is as follows: In equation (11), "k2" is the slope (coefficient) of the approximate line G2 (m·s ２ ) and “Lo” (m) is the initial value of the distance L.

[0084]

[0085] As shown in the above formula (10), the distance ΔL between the reversal position of the winding bobbin 20 and the flange 22A or 22B is proportional to the square of the pitch p and the square of the rotation speed ft, and is inversely proportional to the acceleration a. Therefore, the slope k2 of formula (11) showing the relationship between the rotation speed ft of the winding bobbin 20 and the distance L from the reference position of the winding bobbin 20 to the reversal position is "p ２ / a", and the relationship shown in the following equation (12) holds.

[0086]

[0087] 7, the initial value of the distance Lo (=approximately 0.24155 m) can be obtained. For example, the slope k2=p ２ The value of / a can be calculated.

[0088] (iii) Control of the Reversal Position Using an Approximation Line Formula The memory unit 33 in the processing device 30 shown in Fig. 3 stores a preset pitch p, acceleration a, and an initial value Lo of the reversal position of the winding bobbin 20. The calculation processing unit 32 acquires, for example, the rotation speed ft of the winding bobbin 20 determined by the control unit 34 through the dancer control described above.

[0089] The calculation processing unit 32 also calculates the slope k2=p ２ The distance L from the reference position to the reversal position can be calculated at any time based on / a, the initial value Lo, and the newly acquired rotation speed ft.

[0090] The control unit 34 determines the reversal position of the take-up bobbin 20 based on the distance L calculated by the arithmetic processing unit 32. Then, the control unit 34 outputs a control signal to the traverse motor 16 shown in Fig. 1 so that the direction of the reciprocating movement of the take-up bobbin 20 is reversed at the determined reversal position. By constantly performing such feedforward control during winding of the optical fiber 1, it is possible to achieve a uniform winding density over the entire body portion 21 of the take-up bobbin 20.

[0091] Furthermore, the control unit 34 can control the reversal position of the winding bobbin 20 by performing both the above-mentioned feedback control and feedforward control.

[0092] For example, the control unit 34 may determine the reversal position of the winding bobbin 20 by adding or subtracting a value obtained by multiplying the reversal position of the winding bobbin 20 determined by feedback control by a predetermined coefficient to the reversal position of the winding bobbin 20 determined by feedforward control.

[0093] Incidentally, as described above, when the reversal position of the take-up bobbin 20 is determined based on a change in the vertical position of the dancer roller 12, as in the winding method described in Patent Document 1, it may take some time for this to have an effect on the winding diameter D of the take-up bobbin 20. Furthermore, when such control is performed at high speed, even if the optical fiber 1 bulges or dents on the take-up bobbin 20, the position of the dancer roller 12 does not change in the vertical direction, and it may be difficult to make the winding diameter D of the optical fiber 1 on the take-up bobbin 20 uniform.

[0094] In contrast, the winding device 100 for the optical fiber 1 according to the present disclosure performs both feedforward control, which moves the reversal position based on the rotation speed ft of the winding bobbin 20, and feedback control, which moves the reversal position based on the winding diameter D of the winding bobbin 20. Therefore, the reversal position of the relative movement of the winding bobbin 20 with respect to the guide roller 13A can be more appropriately controlled, and the winding diameter D of the winding bobbin 20 can be made uniform.

[0095] Furthermore, in the winding device 100 for the optical fiber 1 according to the present disclosure, as described above, the equation of the approximate straight line G2 that serves as a model in the feedforward control is obtained, and the obtained equation is used to determine the reversal position of the winding bobbin 20. Therefore, the feedforward control can be performed easily and quickly.

[0096] Similarly, when the guide roller 13A moves back and forth relative to the winding bobbin 20 instead of the winding bobbin 20, the control unit 34 can determine the reversal position of the movement direction of the guide roller 13A by the above-described feedforward control. In this case, the control unit 34 outputs a control signal to a motor (not shown) that controls the drive of the guide roller 13A so that the movement direction of the guide roller 13A is reversed at the determined determination position.

[0097] In addition, in the above embodiment, the winding device 100 for the optical fiber 1 was described as an example of a winding device for a wire body of the present disclosure, but the winding device for a wire body of the present disclosure may also be used for a wire body other than the optical fiber 1.

[0098] Although the present disclosure has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the present disclosure. Furthermore, the number, position, shape, etc. of the components described above are not limited to the above embodiments, and can be changed to the number, position, shape, etc. that are suitable for implementing the present disclosure.

[0099] DESCRIPTION OF SYMBOLS 1 Optical fiber (filament) 10 Supply unit 11, 11A Capstan 12, 12A Dancer roller 13, 13A Guide roller 14 Winding motor (winder) 15 First detector 16 Traverse motor 18 Second detector 20 Winding bobbin 21 Body 22A, 22B Flange 30 Processing device 31 Acquisition unit 32 Arithmetic processing unit 33 Memory unit 34 Control unit 100 Winding device D, D(x) Winding diameter Dr Target value ft Number of revolutions of winding bobbin k1, k2 Coefficient L Distance from reference position of winding bobbin to reversal position Lo Initial value of distance from reference position of winding bobbin to reversal position VL Optical fiber linear speed Vt Winding speed p Pitch Td Differential time Ti Integral time ΔD The difference between the current winding diameter and the target value ΔN is the number of turns of the optical fiber. ΔL is the distance between the reversal position of the winding bobbin and the flange.

Claims

1. A winding device for a wire comprising: a bobbin for winding a wire; a winding machine for rotating the bobbin; and a guide roller for guiding the wire to the bobbin, wherein the bobbin moves back and forth relative to the guide roller along the axial direction of the bobbin; the winding device further comprises a processing device for controlling a reversal position of the relative movement of the bobbin with respect to the guide roller, and the processing device performs both feedforward control for moving the reversal position based on the number of rotations of the bobbin and feedback control for moving the reversal position based on the winding diameter of the bobbin.

2. The wire winding device according to claim 1, wherein the processing device calculates the winding diameter of the bobbin based on the relative movement speed of the bobbin with respect to the guide roller, the number of rotations of the bobbin, and the winding speed of the wire during the feedback control.

3. The wire winding device according to claim 2, wherein the processing device controls the reversal position based on the newly calculated winding diameter and the winding diameter at the center of the axial direction of the bobbin.

4. A wire winding device as described in any one of claims 1 to 3, wherein the processing device obtains a graph showing the relationship between the square of the rotation speed of the bobbin and the reversal position, calculates coefficients of an equation for an approximate straight line of the graph, and determines the reversal position using the coefficients and the rotation speed in the feedforward control.

5. A winding method for a wire winding device including: a bobbin for winding a wire; a winding machine for rotating the bobbin; and a guide roller for guiding the wire to the bobbin, wherein the bobbin moves back and forth relative to the guide roller along the axial direction of the bobbin, the winding method including the steps of: performing feedforward control to move a reversal position of the relative movement of the bobbin with respect to the guide roller based on the number of rotations of the bobbin; and performing feedback control to move the reversal position based on the winding diameter of the bobbin.

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