JP2016196033A - Metal strip winder and metal strip winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively suppress deviation in winding of a metal strip.SOLUTION: A metal strip winder 1 comprises a wind-up machine 8A, a pair of pinch rolls 7a, a shear 3, a sensor part 6A, and a control part 9. The control part 9 executes: a first control such that during a period from start of winding-up of a metal strip M by the wind-up machine 8A until cutting of the metal strip M by a cutting machine, a mandrel 8b is shifted according to an amount of change in a position of a side edge of the metal strip detected by the sensor part 6A; a second control such that immediately before cutting, the metal strip M is sandwiched by the pair of pinch rolls 7a; and a third control such that a treatment in which when cutting, the shift operation of the mandrel 8b is stopped, a treatment in which a press roll 8c is so made as to closely approach the mandrel 8b, and a treatment in which the pair of pinch rolls 7a are shifted along a rotary shaft direction of the pair of pinch rolls 7a according to the amount of change in a position of the side edge of the metal strip M detected by the sensor part 6A are started.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a metal strip winding device and a metal strip winding method.

  A steel plate (strip) rolled into a strip shape (sheet shape) by a rolling mill is wound as a coil on a mandrel of a winder and then shipped as a product. However, when the steel sheet is wound around the mandrel due to the wrinkles inherent in the steel sheet, the steel sheet may swing in the lateral direction (left and right) with respect to the winding direction of the steel sheet, which may cause winding deviation. In this case, an operation of discarding the portion may occur due to bending at a portion of the side edge of the steel plate where the deviation occurs. Furthermore, when the winding deviation is large, a situation where packing cannot be performed in the first place may occur.

  Therefore, Patent Document 1 discloses a winding device for winding a steel plate in a coil shape. The winding device includes a winder that winds a steel plate, a pair of pinch rolls that are positioned upstream of the winder and configured to be able to sandwich the steel plate, and the pair of pinch rolls moves in the direction of the rotation axis A driving mechanism to be operated, a sensor for measuring the position of the side edge of the steel plate, and a control device. A control apparatus acquires the position of the side edge of a steel plate when a steel plate winds around the mandrel of a winder from a sensor, and makes the said position an initial position. The control device compares the initial position with the current position of the side roll of the steel sheet measured over time by the sensor, and sets a pair via the drive mechanism so that the deviation amount from the initial position of the current position becomes zero. Move the pinch roll. Therefore, according to the winding device, occurrence of winding deviation can be suppressed.

JP-A-61-017324

  The steel sheet being wound is supported between a roller of the winder and an upstream device (unwinder or bridle roll). Therefore, since the tension is acting on the steel plate being wound, the steel plate is difficult to swing from side to side. Therefore, winding deviation hardly occurs, and even if winding deviation occurs, the deviation amount is small. On the other hand, the tension | tensile_strength by an upstream apparatus does not act on the steel plate (tail end part) after cut | disconnecting with the cutting machine (shear). For this reason, the steel sheet tends to swing greatly from side to side due to the wrinkles inherent in the steel sheet. Thus, since the steel plate exhibits different behaviors before and after the cutting of the steel plate, the winding deviation can occur even with the winding device described in Patent Document 1.

  Therefore, an object of the present disclosure is to describe a metal band winding device and a metal band winding method that can extremely effectively suppress the winding deviation of the metal band.

  A metal band winding device according to one aspect of the present disclosure includes a winding machine that winds up a metal band, and a first pair of pinches that are positioned on the upstream side of the winder and configured to sandwich the metal band. A roll, a cutting machine that is located upstream of the first pair of pinch rolls and that cuts the metal strip, a sensor unit that detects the position of the side edge of the metal strip, and a control unit; , A mandrel around which the metal band is wound, and a pressing roll configured to be able to approach and separate from the mandrel, and the control unit starts the winding of the metal band by the winder and removes the metal band from the cutting machine. Before the cutting process, the first control for shifting the mandrel along the rotation axis direction of the mandrel according to the amount of change in the position of the side edge of the metal band detected by the sensor unit, and immediately before the cutting process, 2nd which clamps a metal strip with a pair of pinch rolls of 1 Control, a process of stopping the mandrel shift operation during the cutting process, a process of bringing the pressing roll close to the mandrel so that the metal band wound around the mandrel is pressed against the mandrel by the pressing roll, and a sensor A process of shifting the first pair of pinch rolls along the rotational axis direction of the first pair of pinch rolls according to the amount of change in the position of the side edge of the metal band detected by the unit. Control and execute.

  In the metal strip according to one aspect of the present disclosure, the mandrel is arranged along the rotation axis direction of the mandrel according to the amount of change in the position of the side edge of the metal strip detected by the sensor unit from the start of winding to the cutting process. The control unit executes the first control for shifting. At this time, the metal band is before cutting and tension is acting. For this reason, if the metal band is sandwiched between the first pair of pinch rolls and shifted along the rotation axis direction, the metal band may be difficult to move due to the presence of tension. However, by shifting the mandrel itself that applies tension to one end of the metal band, the winding deviation is suppressed extremely effectively. In the metal band winding device according to one aspect of the present disclosure, immediately before the cutting process, the control unit executes the second control for sandwiching the metal band by the first pair of pinch rolls, and further performs the cutting process. At this time, a process for stopping the shifting operation of the mandrel, a process for bringing the pressing roll close to the mandrel so that the metal band wound around the mandrel is pressed against the mandrel by the pressing roll, and a metal detected by the sensor unit The control unit executes the third control for starting the process of shifting the first pair of pinch rolls along the rotation axis direction of the first pair of pinch rolls according to the amount of change in the position of the side edge of the band. To do. That is, before and after the metal band cutting process, the shift target is changed from the mandrel to the first pair of pinch rolls. After the cutting process, the tension by the upstream device is not acting on the tail end of the metal strip. For this reason, the tail end portion of the metal strip is likely to swing greatly, and thus a mandrel having a large weight may be difficult to follow the swing of the metal strip. In addition, when the tail end of the metal band swings greatly, the outermost metal band in contact with the pressing roll moves overcoming the frictional force between the pressing roll and the inner metal band. Therefore, although the metal band is pressed against the mandrel with the pressing roll, winding deviation can occur. However, usually, by shifting the first pair of pinch rolls that are smaller and lighter than the mandrel, the winding deviation is suppressed extremely effectively while dealing with a large deflection of the metal band. As described above, according to the metal band winding device according to one aspect of the present disclosure, the winding deviation of the metal band is extremely effectively suppressed before and after the cutting process of the metal band whose behavior is likely to change greatly. It becomes possible.

  The control unit may execute a fourth control to position the first pair of pinch rolls at a predetermined initial position when the winding of the metal band is not performed. Since there is a limit to the shift amount of the first pair of pinch rolls, the first pair of pinch rolls is positioned at a predetermined initial position each time the metal band is moved by the first pair of pinch rolls. Thus, in the next winding process of the metal band, it is difficult for the fluctuation of the metal band to exceed the shiftable range of the first pair of pinch rolls.

  The control unit further includes a second pair of pinch rolls positioned between the first pair of pinch rolls and the cutting machine and configured to be able to sandwich the metal band, and the control unit winds the metal band by the winder A first control for shifting the mandrel along the rotation axis direction of the mandrel according to the amount of change in the position of the side edge of the metal band detected by the sensor unit from the start to the cutting process of the metal band by the cutting machine; The second control for sandwiching the metal band by the first and second pair of pinch rolls immediately before the cutting process, the process for stopping the mandrel shift operation at the time of the cutting process, and the mandrel The process of bringing the pressing roll close to the mandrel so as to press the metal band against the mandrel with the pressing roll, and the first change according to the amount of change in the position of the side edge of the metal band detected by the sensor unit And a third control for starting the first and second processing for shifting the pair of pinch rolls along the beauty rotation axis direction of the second pair of pinch rolls may be performed. In this case, after the cutting process of the metal band, the metal band is moved while being sandwiched between two pairs of pinch rolls. Therefore, even when the metal strip is thin, it is extremely difficult to twist. Therefore, it is possible to suppress the occurrence of metal band breakage due to twisting.

  In the third control, the first and second pair of pinch rolls may be shifted in the same direction by substantially the same amount of movement. In this case, it is difficult for a shearing force to act on the metal band between one pair of pinch rolls and the other pair of pinch rolls. Accordingly, it is possible to further suppress the occurrence of metal band breakage due to twisting.

  The control unit may execute a fifth control for positioning the second pair of pinch rolls at a predetermined initial position when the metal band is not positioned between the second pair of pinch rolls. Since there is a limit to the shift amount of the second pair of pinch rolls, the second pair of pinch rolls is positioned at a predetermined initial position each time the metal band is moved by the second pair of pinch rolls. Thus, in the next winding process of the metal band, the deflection of the metal band is unlikely to exceed the shiftable range of the second pair of pinch rolls.

  The amount of change in the third control is the amount of deviation of the current position of the side edge of the metal band detected by the sensor unit from the initial position of the side edge of the metal band detected by the sensor unit during the cutting process. Also good. In this case, an initial position is set corresponding to the stop position of the mandrel. Therefore, even if the mandrel moves between the start of winding and the cutting process, the metal band is appropriately guided to the position of the mandrel after the movement. Accordingly, it is possible to more effectively suppress the winding deviation of the metal band.

  The sensor unit further includes a support roll that is disposed upstream of the first pair of pinch rolls and adjacent to the first pair of pinch rolls and supports the metal band from below, and the sensor unit is the first of the metal bands. You may detect the position of the side edge in the part between a pair of pinch roll and support roll. In this case, the portion of the metal strip is supported by the first pair of pinch rolls and the support roll. Therefore, even after the tail end portion of the metal band becomes a free end by the cutting process, it is difficult for the portion to move in the vertical direction. Therefore, the position of the side edge of the portion of the metal band can be detected with extremely high accuracy by the sensor unit.

  A metal band winding method according to another aspect of the present disclosure includes a sensor from a start of winding a metal band by a winder to a cutting process of the metal band by a cutting machine located upstream of the winder. A first step of shifting the mandrel along the rotation axis direction of the mandrel of the winder according to the amount of change in the position of the side edge of the metal band detected by the unit, and the winder immediately before the cutting process The second step of sandwiching the metal band by the first pair of pinch rolls positioned between the cutting machine, the process of stopping the mandrel shift operation during the cutting process, and the mandrel is wound around the mandrel A first pair according to the process of bringing the pressing roll close to the mandrel so that the metal band is pressed against the mandrel by the pressing roll of the winder, and the amount of change in the position of the side edge of the metal band detected by the sensor unit Pinch low Including between processing for along the rotation axis direction shifting the first pair of pinch rolls and a third step of starting the.

  According to the metal band winding method according to another aspect of the present disclosure, the winding of the metal band before and after the cutting process of the metal band, whose behavior is likely to change greatly, similar to the metal band winding device described above. Can be suppressed extremely effectively.

  According to the metal band winding device and the metal band winding method according to the present disclosure, it is possible to extremely effectively suppress winding deviation of the metal band.

FIG. 1 is a side view of a metal strip winding device according to the present embodiment. FIG. 2 is a top view of the metal band winding device according to the present embodiment. FIG. 3 is a block diagram showing a functional configuration of the metal strip winding device according to the present embodiment. FIG. 4 is a flowchart for explaining a method of winding a metal strip by the first winder. FIG. 5 is a diagram for explaining a method of winding a metal strip by the first winder. FIG. 6 is a diagram for explaining a method of winding a metal strip by the first winder. FIG. 7 is a view for explaining a method of winding a metal strip by the first winder. FIG. 8 is a flowchart for explaining a method of winding a metal strip by the second winder. FIG. 9 is a diagram for explaining a method of winding a metal strip by the second winder. FIG. 10 is a diagram for explaining a method of winding a metal strip by the second winder. FIG. 11 is a diagram for explaining a method of winding a metal strip by the second winder. FIG. 12 is a diagram for explaining a method of winding a metal strip by the second winder. FIG. 13 is a side view showing another example of the metal band winding device according to the present embodiment.

  Since the embodiment according to the present disclosure described below is an example for explaining the present invention, the present invention should not be limited to the following contents. In the following description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

[Configuration of metal strip winding device]
First, the structure of the metal strip winding device 1 will be described with reference to FIGS. The metal strip winding device 1 is a device for winding a strip-shaped (sheet-like) metal strip M (for example, a steel strip) processed by a metal strip processing process (annealing, plating, rolling, painting, etc.). The metal band winding device 1 mainly includes a bridle roll 2, a shear 3, an auxiliary clamping unit 4, a first support roll 5A, a first sensor unit 6A, a first clamping unit 7A, and a first winding unit. Machine 8A (tension reel), 2nd support roll 5B, 2nd sensor part 6B, 2nd clamping part 7B, 2nd winder 8B (tension reel), and control part 9 are provided. The bridle roll 2, the shear 3, the auxiliary clamping part 4, the first support roll 5A, the first sensor part 6A, the first clamping part 7A, the first winder 8A, and the second support roll 5B The second sensor unit 6B, the second clamping unit 7B, and the second winder 8B are arranged in this order from the upstream side (the side from which the metal strip M is fed from the rolling mill) to the downstream side.

  The bridle roll 2 feeds the metal strip M to the winders 8A and 8B at a predetermined set speed by driving a motor (not shown). By controlling the feeding speed of the metal band M by the bridle roll 2 and the winding torque of the metal band M by the mandrels 8b and 8g (described later) of the winders 8A and 8B, the bridle is controlled. A predetermined tension acts on the metal strip M spanned between the roll 2 and the winders 8A and 8B.

  The shear 3 is a cutting machine that cuts the metal strip M spanned between the bridle roll 2 and the winders 8A and 8B at a predetermined timing. The shear 3 has a pair of cutting blades 3a, an elevating mechanism 3b, and a moving mechanism (not shown). The elevating mechanism 3b elevates and lowers the pair of cutting blades 3a in the direction of approaching and separating from each other. The moving mechanism moves the pair of cutting blades 3a in the conveying direction of the metal band M at a speed substantially equal to the feeding speed of the metal band M. When the elevating mechanism 3b brings the pair of cutting blades 3a close to each other while the moving mechanism moves the pair of cutting blades 3a in synchronization with the metal band M being conveyed, it is positioned between the pair of cutting blades 3a. The metal strip M is cut by the pair of cutting blades 3a during the movement in the feeding direction. In addition, if it has a mechanism that can move and cut the metal band M in synchronization with the metal band M being conveyed, for example, instead of the pair of cutting blades 3a that are lifted and lowered by the lifting mechanism 3b A pair of rotary blades provided with cutting blades on the outer peripheral surface of the rotary drum may be used.

  The auxiliary clamping unit 4 includes a pair of pinch rolls 4a (second pair of pinch rolls) and cylinders 4b and 4c. Each of the pair of pinch rolls 4a is configured to be rotatable around a rotation axis extending substantially horizontally in the width direction of the metal strip M. The cylinder 4b raises and lowers the pair of pinch rolls 4a in a direction to approach and separate from each other. When the pair of pinch rolls 4a come close to each other by the cylinder 4b, the metal strip M is sandwiched by the pair of pinch rolls 4a. The cylinder 4c moves (shifts) the pair of pinch rolls 4a substantially horizontally in the width direction of the metal strip M. When the cylinder 4c moves the pair of pinch rolls 4a with the pair of pinch rolls 4a sandwiching the metal band M, the metal band M that has passed through the pair of pinch rolls 4a faces the side on which the pair of pinch rolls 4a has moved. And proceed.

  The first support roll 5A supports from the lower side the metal strip M that is passed through from the upstream side (the bridle roll 2 side) to the downstream side (the winders 8A and 8B side). The first support roll 5A is configured to be rotatable around a rotation axis extending substantially horizontally in the width direction of the metal strip M. The first support roll 5 </ b> A is arranged so as not to move in the vertical direction or the rotation axis direction but stays at the installation position.

  The first sensor unit 6A is a device for detecting the position of the side edge of the metal strip M. The first sensor unit 6A includes a solid-state imaging device (for example, a CCD image sensor or a CMOS image sensor) and an image processing unit (not shown). The solid-state imaging device images near the side edge of the metal strip M. The image processing unit performs image processing on the data of the captured image captured by the solid-state imaging device, and calculates the position of the side edge of the metal band M.

  7 A of 1st clamping parts have a pair of pinch roll 7a (1st pair of pinch roll), and cylinder 7b, 7c. Each of the pair of pinch rolls 7a is configured to be rotatable around a rotation axis extending substantially horizontally in the width direction of the metal strip M. The cylinder 7b raises and lowers the pair of pinch rolls 7a in a direction to approach and separate from each other. When the pair of pinch rolls 7a come close to each other by the cylinder 7b, the metal strip M is sandwiched by the pair of pinch rolls 7a. The cylinder 7c moves (shifts) the pair of pinch rolls 7a substantially horizontally in the width direction of the metal strip M. When the cylinder 7c moves the pair of pinch rolls 7a with the pair of pinch rolls 7a sandwiching the metal band M, the metal band M that has passed the pair of pinch rolls 7a is directed toward the side on which the pair of pinch rolls 7a has moved. And proceed.

  The first winder 8A is a device for winding the metal strip M in a coil shape. The first winder 8A includes a main body 8a, a mandrel 8b, a pressing roll 8c, and cylinders 8d and 8e. The main body 8a drives the mandrel 8b to rotate about its rotation axis. The mandrel 8b is attached to the main body 8a so as to be rotatable around a rotation axis extending substantially horizontally in the width direction of the metal strip M. The mandrel 8b is driven to rotate by the main body portion 8a, thereby winding the metal band M around its peripheral surface. When the metal band M is wound around the mandrel 8b, the pressing roll 8c is configured to contact the metal band M located on the outermost periphery and press the outermost metal band M toward the mandrel 8b. ing. The cylinder 8d moves (shifts) the mandrel 8b substantially horizontally with the main body 8a in the width direction of the metal strip M. The cylinder 8e moves the pressing roll 8c close to and away from the mandrel 8b. In the present embodiment, the first winder 8A has three sets of pressing rolls 8c and cylinders 8e, but may have at least one set of pressing rolls 8c and cylinders 8e.

  The second support roll 5B supports, from below, the metal strip M that is passed through from the upstream side (the bridle roll 2 side) to the downstream side (the winder 8B side). The second support roll 5B is configured to be rotatable around a rotation axis extending substantially horizontally in the width direction of the metal strip M. The 2nd support roll 5B is arrange | positioned so that it may not move to an up-down direction or a rotating shaft direction, but may stay in an installation position.

  The second sensor unit 6B is a device for detecting the position of the side edge of the metal strip M. The second sensor unit 6B includes a solid-state imaging device (for example, a CCD image sensor or a CMOS image sensor) and an image processing unit (not shown). The solid-state imaging device images near the side edge of the metal strip M. The image processing unit performs image processing on the data of the captured image captured by the solid-state imaging device, and calculates the position of the side edge of the metal band M.

  The second clamping unit 7B has a pair of pinch rolls 7d and cylinders 7e and 7f. Each of the pair of pinch rolls 7d is configured to be rotatable around a rotation axis extending substantially horizontally in the width direction of the metal strip M. The cylinder 7e raises and lowers the upper pinch roll 7d in a direction approaching and separating from the lower pinch roll 7d, but does not drive the lower pinch roll 7d. When the pair of pinch rolls 7d come close to each other by the cylinder 7e, the metal band M is sandwiched by the pair of pinch rolls 7d. The cylinder 7f moves (shifts) the pair of pinch rolls 7d substantially horizontally in the width direction of the metal strip M. When the cylinder 7f moves the pair of pinch rolls 7d with the pair of pinch rolls 7d sandwiching the metal band M, the metal band M that has passed through the pair of pinch rolls 7d faces the side on which the pair of pinch rolls 7d has moved. And proceed.

  The second winder 8B is a device for winding the metal strip M in a coil shape. The second winder 8B includes a main body portion 8f, a mandrel 8g, a pressing roll 8h, and cylinders 8i and 8j. The main body portion 8f drives the mandrel 8g to rotate around its rotation axis. The mandrel 8g is attached to the main body 8f so as to be rotatable around a rotation axis extending substantially horizontally in the width direction of the metal strip M. The mandrel 8g is driven to rotate by the main body portion 8f, thereby winding the metal band M around its peripheral surface. When the metal band M is wound around the mandrel 8g, the pressing roll 8h is configured to contact the metal band M located on the outermost periphery and press the outermost metal band M toward the mandrel 8g. ing. The cylinder 8i moves (shifts) the mandrel 8g in the width direction of the metal strip M together with the main body 8f substantially horizontally. The cylinder 8j moves the pressing roll 8h close to and away from the mandrel 8g. In the present embodiment, the second winder 8B has three sets of pressing rolls 8h and cylinders 8j, but may have at least one set of pressing rolls 8h and cylinders 8j.

  As shown in FIG. 3, the control unit 9 includes a sequence control unit 9 a and first to fourth side edge position control (EPC) units 9 c to 9 f.

  The sequence control unit 9a controls the operation of the elevating mechanism 3b and causes the metal strip M to be cut by the cutting blade 3a. The sequence controller 9a controls the operation of the cylinder 4b to bring the pair of pinch rolls 4a close to and away from each other. The sequence control unit 9a controls the operation of the cylinder 7b to bring the pair of pinch rolls 7a close to and away from each other in the vertical direction. The sequence controller 9a controls the operation of the cylinder 7e, and moves the upper pinch roll 7d closer to and away from the lower pinch roll 7d. The sequence control unit 9a controls the operation of the cylinder 8e and moves the pressing roll 8c closer to and away from the mandrel 8b. The sequence controller 9a controls the operation of the cylinder 8j and moves the pressing roll 8h closer to and away from the mandrel 8g.

  The first EPC unit 9c starts or stops control of each operation of the cylinders 4c and 7c in accordance with a control signal from the sequence control unit 9a. Specifically, when the first EPC unit 9c starts control, the first EPC unit 9c controls the operations of the cylinders 4c and 7c based on a centering start signal (described later) or a signal from the first sensor unit 6A. The pinch rolls 4a and 7a are moved substantially horizontally (shift operation).

  The second EPC unit 9d starts or stops control of the operation of the cylinder 8d in accordance with a control signal from the sequence control unit 9a. Specifically, when the control is started, the second EPC unit 9d controls the operation of the cylinder 8d based on the signal from the first sensor unit 6A, and moves the mandrel 8b together with the main body unit 8a substantially horizontally (shifting operation). )

  The third EPC unit 9e starts or stops control of each operation of the cylinders 4c, 7c, and 7f in accordance with a control signal from the sequence control unit 9a. Specifically, when the control starts, the third EPC unit 9e controls the operations of the cylinders 4c, 7c, and 7f based on a centering (described later) start signal or a signal from the first sensor unit 6A. The pair of pinch rolls 4a, 7a, 7d are moved (shifted) substantially horizontally.

  The fourth EPC unit 9f starts or stops the control of the operation of the cylinder 8i in accordance with a control signal from the sequence control unit 9a. Specifically, when starting the control, the fourth EPC unit 9f controls the operation of the cylinder 8i based on a signal from the second sensor unit 6B, and moves the mandrel 8g together with the main body unit 8f substantially horizontally (shift operation). )

[Operation of metal winding device]
(1) 1st winder Then, with reference to FIGS. 4-7, the winding method of the metal strip M by the 1st winder 8A is demonstrated.

  When the first winder 8A starts the winding process of the metal band M, the first winder 8A starts the side edge position control of the metal band M (step S1 in FIG. 4). Specifically, when the first sensor unit 6A detects a deviation amount with respect to the initial position of the side edge of the metal band M (the first initial position of the side edge of the metal band M), information on the deviation amount is obtained from the first sensor unit. 6A is transmitted to the second EPC unit 9d. The initial position here is, for example, the side of the metal band M detected by the first sensor unit 6A when the tip of the metal band M is wrapped around the mandrel 8b of the winder 8A and tension is applied to the metal band M. It may be an edge position. When the second EPC unit 9d receives the shift amount information, the second EPC unit 9d controls the cylinder 8d to shift the mandrel 8b having a length substantially the same as the shift amount. That is, the second EPC unit 9d controls the cylinder 8d based on the signal from the first sensor unit 6A. At this time, the pair of pinch rolls 4a, 7a, and 7d of the auxiliary clamping unit 4, the first clamping unit 7A, and the second clamping unit 7B are separated from each other as shown in FIG. All of the pressing rolls 8c of the first winder 8A are separated from the metal strip M located on the outermost periphery as shown in FIG. The winding speed of the metal strip M by the first winder 8A may be, for example, about 30 m / min to 1000 m / min. When the mandrel 8b is shifted, the mandrel 8b may be moved together with the main body 8a.

  Next, centering is started in the second clamping unit 7B (step S2 in FIG. 4). Specifically, when the third EPC unit 9e receives a centering start signal from the sequence control unit 9a, the third EPC unit 9e controls the cylinder 7f to position the pair of pinch rolls 7d in the width direction of the metal strip M. Is moved to the initial position. The initial position here may be, for example, an intermediate position of the movable range (strokeable range) of the cylinder 7f. When the winding process of the metal band M by the second winder 8B is not performed before the winding process of the metal band M by the first winder 8A, the process of step S2 may not be performed. . On the other hand, when the winding process of the metal band M by the second winder 8B is performed before the winding process of the metal band M by the first winder 8A, the winding is performed by the second winder 8B. The processing of step S2 may be performed after the tail end of the taken metal band M has passed through the second clamping unit 7B.

  Next, as shown in FIG. 5B, immediately before the metal band M is cut by the shear 3 (cutting blade 3a), the metal band M is held by the first holding part 7A and the auxiliary holding part 4. Start (step S3 in FIG. 4). Specifically, when the sequence control unit 9a determines that it is immediately before the cutting process, the sequence control unit 9a controls the cylinders 4b and 7b to bring the pair of pinch rolls 4a and 7a close to each other. At this time, tension is applied to the metal band M by the pinch rolls 4a and 7a and the mandrel 8b. Immediately before the cutting process may be when the planned cutting position of the metal strip M reaches a predetermined position (for example, when the planned cutting position reaches several m to several tens of m before the shear 3), It may be when a predetermined time has elapsed from the start of winding of the metal strip M (for example, when several seconds before the cutting time).

  Next, as shown in FIG. 6A, the sequence control unit 9a controls the lifting mechanism 3b to start cutting the metal strip M with the cutting blade 3a (step S4 in FIG. 4). When the metal strip M is cut, the downstream metal strip M wound by the first winder 8A (hereinafter referred to as the metal strip M1) and the downstream metal strip fed from the rolling mill. It is divided into M (hereinafter referred to as a metal band M2).

  Next, the second EPC unit 9d controls the cylinder 8d to stop (lock) the shifting operation of the mandrel 8b (step S5 in FIG. 4). When the first EPC section 9c receives the position signal of the side edge of the metal band M1 at this time from the first sensor section 6A, the first EPC section 9c receives the position from the first initial position of the side edge of the metal band M1 (the side edge of the metal band M1). 2nd initial position).

  Next, the sequence controller 9a controls the cylinder 8e and starts moving the pressing roll 8c (step S6 in FIG. 4). Thereby, as shown in FIG. 6B, the pressing roll 8c comes close to the outermost metal band M1 wound around the mandrel 8b, and the pressing roll 8c moves the outermost metal band M1 to the mandrel. Press toward 8b.

  Next, the side edge position control of the metal strip M1 is started in the first clamping part 7A and the auxiliary clamping part 4 (step S7 in FIG. 4). Specifically, when the first sensor unit 6A detects the current position of the side edge of the metal strip M1, the first EPC unit 9c that has received the information on the current position determines the amount of deviation of the current position from the second initial position. calculate. The first EPC unit 9c controls the cylinders 4c and 7c to shift the pair of pinch rolls 4a and 7a so that the calculated deviation amount becomes zero (in a direction to cancel the deviation amount). That is, the first EPC unit 9c controls the movement amount (shift amount) of the pair of pinch rolls 4a and 7a based on the signal from the first sensor unit 6A. The same direction may be sufficient as the shift direction of a pair of pinch rolls 4a and 7a. The movement amounts (shift amounts) of the pair of pinch rolls 4a and 7a may be substantially the same.

  Next, when a sensor unit (not shown) detects that the tail end of the metal band M1 has passed through the auxiliary clamping unit 4 and the sequence control unit 9a receives the detection signal, the metal band M1 is released from the auxiliary clamping unit 4 Is started (step S8 in FIG. 4). Specifically, as shown in FIG. 7A, the sequence control unit 9a controls the cylinder 4b to separate the pair of pinch rolls 4a. At this time, the first EPC unit 9c may control the cylinder 4c to stop (lock) the shift operation of the pair of pinch rolls 4a before and after the pair of pinch rolls 4a are separated. The first EPC unit 9c may perform the centering process of the auxiliary clamping unit 4 after the pair of pinch rolls 4a are separated from each other. Specifically, when the first EPC unit 9c receives a centering start signal from the sequence control unit 9a, the first EPC unit 9c controls the cylinder 4c to position the pair of pinch rolls 4a in the width direction of the metal strip M. Is moved to the initial position. The initial position here may be, for example, an intermediate position of the movable range (strokeable range) of the cylinder 4c.

  Next, when a sensor unit (not shown) detects that the tail end of the metal band M1 has passed through the first clamping unit 7A and the sequence control unit 9a receives the detection signal, the metal band M1 from the first clamping unit 7A. Is started (step S9 in FIG. 4). Specifically, as shown in FIG. 7B, the sequence control unit 9a controls the cylinder 7b to separate the pair of pinch rolls 7a.

  When all of the metal strip M1 is thus wound around the mandrel 8b in a coil shape, the extraction of the coil from the mandrel 8b is started (step S10 in FIG. 4). Specifically, the coil is held by a crane or the like (not shown) and removed from the mandrel 8b, and then the coil is transported to a predetermined storage location. Thus, the winding of the metal strip M (M1) by the first winder 8A is completed.

(2) Second Winder Next, a method of winding the metal strip M by the second winder 8B will be described with reference to FIGS.

  When the second winder 8B starts the winding process of the metal band M, the second winder 8B starts the side edge position control of the metal band M (step S11 in FIG. 8). Specifically, when the second sensor unit 6B detects a shift amount with respect to an initial position of the side edge of the metal band M (a third initial position of the side edge of the metal band M), information on the shift amount is displayed in the second sensor unit. 6B is transmitted to the fourth EPC unit 9f. The initial position here is, for example, the side of the metal band M detected by the first sensor unit 6B when the tip of the metal band M is wound around the mandrel 8g of the winder 8B and tension is applied to the metal band M. It may be an edge position. When the fourth EPC unit 9f receives the shift amount information, the fourth EPC unit 9f controls the cylinder 8i to shift the mandrel 8g having a length substantially the same as the shift amount. That is, the fourth EPC unit 9f controls the cylinder 8i based on the signal from the second sensor unit 6B. At this time, the pair of pinch rolls 4a, 7a, and 7d of the auxiliary clamping unit 4, the first clamping unit 7A, and the second clamping unit 7B are separated from each other as shown in FIG. All of the pressing rolls 8h of the second winder 8B are separated from the metal strip M located on the outermost periphery as shown in FIG. The winding speed of the metal strip M by the second winder 8B may be, for example, about 30 m / min to 1000 m / min. When the mandrel 8g is shifted, the mandrel 8g may be moved together with the main body 8f.

  Next, centering is started in the first clamping unit 7A (step S12 in FIG. 8). Specifically, when the first EPC unit 9c receives a centering start signal from the sequence control unit 9a, the first EPC unit 9c controls the cylinder 7c to position the pair of pinch rolls 7a in the width direction of the metal strip M. Is moved to the initial position. The initial position here may be, for example, an intermediate position of the movable range (stroke possible range) of the cylinder 7c. When the winding process of the metal band M by the first winder 8A is not performed before the winding process of the metal band M by the second winder 8B, the process of step S12 may not be performed. . On the other hand, when the winding process of the metal band M by the first winder 8A is performed before the winding process of the metal band M by the second winder 8B, the winding is performed in the first winder 8A. The processing of step S12 may be performed after the tail end of the taken metal band M has passed through the first clamping unit 7A.

  Next, as shown in FIG. 9B, immediately before the cutting process of the metal strip M by the shear 3 (cutting blade 3a), the first clamping part 7A, the second clamping part 7B, and the auxiliary clamping part 4 The clamping of the metal strip M is started (step S13 in FIG. 8). Specifically, when the sequence control unit 9a determines that it is immediately before the cutting process, the sequence control unit 9a controls the cylinders 4b, 7b, and 7e so that the pair of pinch rolls 4a, 7a, and 7d are Close. At this time, tension is applied to the metal band M by the pinch rolls 4a, 7a, 7d and the mandrel 8g. Immediately before the cutting process may be when the planned cutting position of the metal strip M reaches a predetermined position (for example, when the planned cutting position reaches several m to several tens of m before the shear 3), It may be when a predetermined time has elapsed from the start of winding of the metal strip M (for example, when several seconds before the cutting time).

  Next, as shown in FIG. 10A, the sequence control unit 9a controls the lifting mechanism 3b to start cutting the metal strip M with the cutting blade 3a (step S14 in FIG. 8). When the metal strip M is cut, the downstream metal strip M wound by the second winder 8B (hereinafter referred to as the metal strip M3) and the downstream metal strip fed from the rolling mill. It is divided into M (hereinafter referred to as a metal band M4).

  Next, the fourth EPC unit 9f controls the cylinder 8i to stop (lock) the shifting operation of the mandrel 8g (step S15 in FIG. 8). When receiving the position signal of the side edge of the metal band M3 at this time from the second sensor unit 6B, the third EPC unit 9e sets the position as a new initial position (fourth initial position) of the side edge of the metal band M3. To do.

  Next, the sequence controller 9a controls the cylinder 8j and starts moving the pressing roll 8h (step S16 in FIG. 8). Thereby, as shown in FIG. 10B, the pressing roll 8h comes close to the outermost metal band M3 wound around the mandrel 8g, and the pressing roll 8h moves the outermost metal band M3 to the mandrel. Press toward 8g.

  Next, the side edge position control of the metal strip M3 is started in the first clamping part 7A, the second clamping part 7B, and the auxiliary clamping part 4 (step S17 in FIG. 8). Specifically, when the second sensor unit 6B detects the current position of the side edge of the metal strip M3, the third EPC unit 9e that has received the information on the current position determines the amount of deviation of the current position from the fourth initial position. calculate. The third EPC unit 9e controls the cylinders 4c, 7c, and 7f to shift the pair of pinch rolls 4a, 7a, and 7d so that the calculated shift amount becomes zero (in a direction to cancel the shift amount). That is, the third EPC unit 9e controls the movement amounts (shift amounts) of the pair of pinch rolls 4a, 7a, and 7d based on the signal from the second sensor unit 6B. The shift direction of the pair of pinch rolls 4a, 7a, 7d may be the same direction. The movement amounts (shift amounts) of the pair of pinch rolls 4a, 7a, 7d may be substantially the same.

  Next, when a sensor unit (not shown) detects that the tail end of the metal band M3 has passed through the auxiliary clamping unit 4 and the sequence control unit 9a receives the detection signal, the metal band M3 is released from the auxiliary clamping unit 4 Is started (step S18 in FIG. 8). Specifically, as shown in FIG. 11A, the sequence control unit 9a controls the cylinder 4b to separate the pair of pinch rolls 4a. At this time, the third EPC unit 9e may control the cylinder 4c to stop (lock) the shift operation of the pair of pinch rolls 4a before and after separating the pair of pinch rolls 4a. The third EPC unit 9e may perform the centering process of the auxiliary clamping unit 4 after the pair of pinch rolls 4a are separated. Specifically, when the third EPC unit 9e receives a centering start signal from the sequence control unit 9a, the third EPC unit 9e controls the cylinder 4c to position the pair of pinch rolls 4a in the width direction of the metal strip M. Is moved to the initial position. The initial position here may be, for example, an intermediate position of the movable range (strokeable range) of the cylinder 4c.

  Next, when a sensor unit (not shown) detects that the tail end of the metal band M3 has passed through the first clamping unit 7A and the sequence control unit 9a receives the detection signal, the metal band M3 from the first clamping unit 7A. Is started (step S19 in FIG. 8). Specifically, as shown in FIG. 11B, the sequence control unit 9a controls the cylinder 7b to separate the pair of pinch rolls 7a.

  Next, when a sensor unit (not shown) detects that the tail end of the metal band M3 has passed through the second clamping unit 7B and the sequence control unit 9a receives the detection signal, the metal band M3 from the second clamping unit 7B. Is started (step S20 in FIG. 8). Specifically, as shown in FIG. 12, the sequence control unit 9a controls the cylinder 7e to separate the pair of pinch rolls 7a.

  Thus, when all of the metal strip M3 is wound around the mandrel 8g in a coil shape, the extraction of the coil from the mandrel 8g is started (step S21 in FIG. 8). Specifically, the coil is held by a crane (not shown) and removed from the mandrel 8g, and then the coil is transported to a predetermined storage location. Thus, the winding of the metal strip M (M3) by the second winder 8B is completed.

[Action and effect]
The operation and effect of the present embodiment as described above will be described below on the premise of the winding process of the metal strip M by the first winder 8A, but the same effect can be obtained in the second winder 8B. .

  In the present embodiment, the rotation axis of the mandrel 8b is determined according to the amount of change in the position of the side edge of the metal strip M detected by the first sensor unit 6A from the start of winding to the cutting process in the first winder 8A. The control unit 9 (second EPC unit 9d) executes the first control (step S1) for shifting the mandrel 8b along the direction. At this time, the metal band M is before cutting and tension is acting. Therefore, if the metal band M is sandwiched between the pair of pinch rolls 4a and 7a and shifted along the rotation axis direction at this time, it may be difficult to move the metal band M due to the presence of tension. The shape of the metal band M may be destroyed. However, by shifting the mandrel 8b itself in which tension is applied to one end of the metal band M, winding deviation is extremely effectively suppressed, and the shape of the metal band M is not easily broken. In the present embodiment, immediately before the cutting process, the control unit 9 (sequence control unit 9a) executes the second control (step S3) for holding the metal band M between the pair of pinch rolls 4a and 7a, and further the cutting. In the process, the process of stopping the shifting operation of the mandrel 8b (step S5) and the pressing roll 8c against the mandrel 8b so that the metal band M wound around the mandrel 8b is pressed against the mandrel 8b by the pressing roll 8c. And a pair of pinches along the rotational axis direction of the pair of pinch rolls 4a and 7a according to the amount of change in the position of the side edge of the metal strip M detected by the first sensor unit 6A (step S6). The third control for starting the process of shifting the rolls 4a and 7a (step S7) is performed by the control unit 9 (sequence control unit 9a, first EPC unit 9c). Beauty The 2EPC portion 9d) is executed. That is, before and after the cutting process of the metal band M, the shift target is changed from the mandrel 8b to the pair of pinch rolls 4a and 7a. After the cutting process, the tension by the upstream device does not act on the tail end of the metal strip M (M1). Therefore, since the tail end portion of the metal band M (M1) is likely to swing greatly, the heavy mandrel 8b may have difficulty following the swing of the metal band M (M1). In addition, when the tail end of the metal band M (M1) swings greatly, the outermost metal band M (M1) that is in contact with the pressing roll 8c has a frictional force between the pressing roll 8c and the inner metal band. Even if the metal belt M (M1) is pressed against the mandrel 8b by the pressing roll 8c, the winding slippage may occur. However, usually, by shifting the pair of pinch rolls 4a and 7a that are smaller and lighter than the mandrel 8b, the winding deviation can be suppressed extremely effectively while accommodating a large deflection of the metal strip M (M1). As described above, according to the present embodiment, it is possible to extremely effectively suppress the winding deviation of the metal band M before and after the cutting process of the metal band M whose behavior tends to change greatly. In addition, the metal strip M is relatively thick and has a thickness of about 1 mm to 20 mm, which is to be wound by a continuous hot rolling mill (hot strip mill) to which the winding device of Patent Document 1 is applied. Not only the metal strip M whose tolerance range for shape collapse tends to be slightly wide, but also metal whose thickness is relatively thin, about 0.15 mm to 1 mm, and whose tolerance range for shape collapse of the metal strip M tends to be narrow. The band M (for example, a surface-treated steel plate or the like) can also be wound by the metal band winding device 1 according to this embodiment.

  In the present embodiment, the control unit 9 (third EPC unit 9e) positions the pair of pinch rolls 7d at a predetermined initial position when the metal strip M is not wound by the second winder 8B. The fourth control (step S2) is executed. Since there is a limit to the shift amount of the pair of pinch rolls 7d, each time the metal band M is shifted by the pair of pinch rolls 7d, the pair of pinch rolls 7d is positioned at a predetermined initial position. In the winding process of the band M, it is difficult for the deflection of the metal band M to exceed the shiftable range (movable range) of the pair of pinch rolls 7d.

  In the present embodiment, the first to third controls are performed using two pairs of pinch rolls 4a and 7a. Therefore, after the cutting process of the metal band M, the metal band M is moved while being sandwiched between the two pairs of pinch rolls 4a and 7a. Therefore, even when the metal strip M is thin, it is extremely difficult to twist. Accordingly, it is possible to suppress the occurrence of bending of the metal band M due to twisting.

  In the present embodiment, in the third control described above, the pair of pinch rolls 4a and 7a are shifted in the same direction by substantially the same amount of movement. Therefore, it is difficult for a shearing force to act on the metal band M between one and the other of the pair of pinch rolls 4a and 7a. Therefore, generation | occurrence | production of the bending of the metal strip M resulting from a twist can be suppressed further.

  In the present embodiment, the control unit 9 (first EPC unit 9c) is a fifth unit that positions the pair of pinch rolls 4a at a predetermined initial position when the metal band M is not positioned between the pair of pinch rolls 4a. Control (step S8) is executed. Since there is a limit to the shift amount of the pair of pinch rolls 4a, each time the metal band M is shifted by the pair of pinch rolls 4a, the pair of pinch rolls 4a is positioned at a predetermined initial position, so that the next metal In the winding process of the band M, it is difficult for the deflection of the metal band M to exceed the shiftable range (movable range) of the pair of pinch rolls 4a.

  In the present embodiment, the amount of change in the above-described third control is determined based on the initial position of the side edge of the metal band M1 detected by the first sensor unit 6A during the cutting process (the second initial position of the side edge of the metal band M1). The position is evaluated by the amount of deviation of the current position of the side edge of the metal band M1 detected by the first sensor unit 6A. Therefore, the second initial position is set corresponding to the stop position of the mandrel 8b. Therefore, even if the mandrel 8b moves between the start of winding and the cutting process, the metal band M1 is appropriately guided to the position of the mandrel 8b after the movement. As a result, it is possible to more effectively suppress the winding deviation of the metal band M1.

  In the present embodiment, the support roll 5A that supports the metal strip M from below is disposed on the upstream side of the pair of pinch rolls 7a and adjacent to the pair of pinch rolls 7a, and the first sensor unit 6A is In the metal band M, the position of the side edge between the pair of pinch rolls 7a and the support roll 5A is detected. Therefore, since the portion of the metal band M is supported by the pair of pinch rolls 7a and the support roll 5A, even after the tail end of the metal band M1 becomes a free end by the cutting process, the tail end is It is difficult to move up and down. Therefore, the position of the side edge of the portion of the metal strip M1 can be detected by the first sensor unit 6A with extremely high accuracy.

[Other Embodiments]
As mentioned above, although embodiment concerning this indication was described in detail, you may add various deformation | transformation to said embodiment within the range of the summary of this invention. For example, although the metal strip winding device 1 includes two sets of support rolls, sensor units, clamping units, and winders, the metal strip winding device 1 may include one or more sets of these elements.

  The metal band winding device 1 may not include the auxiliary clamping unit 4 or may include the support rolls 5A and 5B.

  The metal band winding device 1 may or may not perform control to position the pair of pinch rolls 4a, 7a, and 7d at a predetermined initial position. The metal band winding device 1 may or may not perform control for positioning the mandrels 8b and 8g at a predetermined initial position.

  The sequence control unit 9a may directly receive signals from the first and second sensor units 6A and 6B and control the first to fourth EPC units 9c to 9f. The sequence control unit 9a may directly control the cylinders 4c, 7c, 8d, 7f, and 8i without going through the first to fourth EPC units 9c to 9f.

  Instead of the first and second sensor units 6A and 6B, a third sensor unit 6C may be used as shown in FIG. The third sensor unit 6C includes a transmissive sensor and a signal processing unit (not shown). The transmissive sensor includes a light projecting unit 6a and a light receiving unit 6b. The light receiving unit 6b receives light emitted from the light projecting unit 6a. When the side edge of the metal band M exists between the light projecting unit 6a and the light receiving unit 6b, the metal band M blocks part of the light emitted by the light projecting unit 6a. The signal processing unit detects the position of the side edge of the metal band M based on the light receiving state and the light shielding state detected by the light receiving unit 6b. When using a transmissive sensor, the position of the side edge of the metal band M can be detected with high accuracy even if the tail edge moves in the vertical direction after the tail edge of the metal band M becomes free after cutting. it can. Therefore, in this case, the metal strip winding device 1 may not include the first and second support rolls 5A and 5B.

  DESCRIPTION OF SYMBOLS 1 ... Metal strip winding device, 3 ... Shear (cutting machine), 4 ... Auxiliary clamping part, 4a ... Pinch roll, 5A ... 1st support roll, 5B ... 2nd support roll, 6A ... 1st sensor part, 6B ... 2nd sensor part, 7A ... 1st clamping part, 7B ... 2nd clamping part, 7a, 7d ... Pinch roll, 8A ... 1st winder (tension reel), 8B ... 2nd winder (tension reel), 8b, 8g ... mandrel, 8c, 8h ... pressure roll, 9 ... control unit, 9a ... sequence control unit, 9c ... first EPC unit, 9d ... second EPC unit, 9e ... third EPC unit, 9f ... fourth EPC unit, M ... Metal strip.

Claims (8)

A winder to wind up the metal strip,
A first pair of pinch rolls positioned upstream of the winder and configured to sandwich the metal strip; and
A cutting machine located upstream of the first pair of pinch rolls and cutting the metal strip;
A sensor unit for detecting a position of a side edge of the metal strip;
A control unit,
The winder is
A mandrel around which the metal strip is wound;
A pressing roll configured to be able to approach and separate from the mandrel;
The controller is
The mandrel is detected according to the amount of change in the position of the side edge of the metal band detected by the sensor unit from the start of winding of the metal band by the winder to the cutting process of the metal band by the cutting machine. A first control for shifting the mandrel along the rotational axis direction of
A second control for sandwiching the metal band by the first pair of pinch rolls immediately before the cutting process;
In the cutting process, the process of stopping the shifting operation of the mandrel, and the pressing roll is brought close to the mandrel so that the metal band wound around the mandrel is pressed against the mandrel by the pressing roll. And shifting the first pair of pinch rolls along the rotation axis direction of the first pair of pinch rolls according to the amount of change in the position of the side edge of the metal band detected by the sensor unit And a third control for starting the processing to be performed.   The said control part performs 4th control which positions a said 1st pair of pinch roll in a predetermined | prescribed initial position, when the winding of the said metal strip by the said winding machine is not performed. 1. A metal band winding device according to 1. A second pair of pinch rolls positioned between the first pair of pinch rolls and the cutting machine and configured to sandwich the metal band;
The controller is
The mandrel is detected according to the amount of change in the position of the side edge of the metal band detected by the sensor unit from the start of winding of the metal band by the winder to the cutting process of the metal band by the cutting machine. A first control for shifting the mandrel along the rotational axis direction of
A second control for sandwiching the metal band by the first and second pair of pinch rolls immediately before the cutting process;
In the cutting process, the process of stopping the shifting operation of the mandrel, and the pressing roll is brought close to the mandrel so that the metal band wound around the mandrel is pressed against the mandrel by the pressing roll. And the first and second pairs along the direction of the rotation axis of the first and second pair of pinch rolls according to the amount of change in the position of the side edge of the metal strip detected by the sensor unit. The metal strip winding device according to claim 1 or 2, wherein a third control for starting a process of shifting the pair of pinch rolls is executed.   4. The metal strip winding device according to claim 3, wherein, in the third control, the first and second pair of pinch rolls are shifted in substantially the same amount of movement in the same direction.   The control unit executes a fifth control to position the second pair of pinch rolls at a predetermined initial position when the metal band is not positioned between the second pair of pinch rolls. The metal strip winding device according to claim 3 or 4.   The amount of change in the third control is a current value of a side edge of the metal band detected by the sensor unit with respect to an initial position of the side edge of the metal band detected by the sensor unit during the cutting process. The metal band winding device according to any one of claims 1 to 5, which is a positional shift amount. A support roll that is disposed upstream of the first pair of pinch rolls and adjacent to the first pair of pinch rolls and supports the metal strip from below;
The metal according to claim 1, wherein the sensor unit detects a position of a side edge in a portion between the first pair of pinch rolls and the support roll in the metal band. Band winding device. The position of the side edge of the metal band detected by the sensor unit from the start of winding the metal band by the winder to the cutting process of the metal band by the cutting machine located upstream from the winder A first step of shifting the mandrel along the rotation axis direction of the mandrel of the winder according to the change amount of
A second step of sandwiching the metal strip by a first pair of pinch rolls positioned between the winder and the cutting machine immediately before the cutting process;
In the cutting process, the mandrel is shifted so that the mandrel shift operation is stopped, and the metal roll wound around the mandrel is pressed against the mandrel by the press roll of the winder. And the first pair of pins along the rotation axis direction of the first pair of pinch rolls according to the amount of change in the position of the side edge of the metal band detected by the sensor unit. And a third step of starting a process of shifting the pinch roll.

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