JP5878618B1 - Sheet winding device and sheet winding method - Google Patents

Abstract

An object of the present invention is to provide a sheet winding apparatus and a sheet winding method capable of controlling a speed difference in a stretch section and improving a yield to manufacture a small wound sheet. The present invention relates to a sheet winding apparatus or a sheet winding method, in which a winding shaft for winding a sheet fed from an original roll is pressed against the winding roller, and the winding roller and the original roll are separated. A stretch section is formed by controlling the difference in sheet feeding speed between the sheet feeding roller and the sheet feeding roller, which are provided between the sheet feeding roller and the sheet feeding roller, respectively. The stable speed area to be controlled and the deceleration area to be decelerated are repeated, and the speed difference is controlled in each area, the sheet from the roll is made into a small roll on the take-up shaft, a small roll is formed, and the roll is rolled. The start of the acceleration region of the sheet delivery roll is delayed for a predetermined period with respect to the start of the sheet feed roller. [Selection] Figure 4

Description

  The present invention relates to a sheet winding apparatus for winding a sheet made of a low-rigidity plastic, generally called a web (WEB), and in particular, an ultrathin sheet of several tens μm or less, for example, a high speed of 10 m / sec or more. A sheet winding apparatus and a sheet winding method suitable for winding on a sheet are provided.

  A thin-film sheet drive control system and apparatus for winding an ultrathin sheet-like member without defects such as wrinkles at a high speed and a sheet winding apparatus using the same are disclosed in, for example, Patent Documents 1 and 2 below. Already known.

  In the sheet winding apparatus disclosed in the cited document 1, a handling method in which wrinkles are unlikely to occur in a thin film sheet is proposed in consideration of a cause of defects in subsequent coating processing or pattern formation processing on the sheet. Basically, a high-precision microtension control section is provided between the sheet feeding means (sheet feeding roller) and the sheet feeding means (sheet feeding roller) to stretch the sheet. The pressure roller is pressed against the sheet feeding means (sheet feeding roller) side and the sheet feeding means (sheet feeding roller) side to rotate and control the rotation amount (sheet feeding conveyance amount) of these pressing rollers. To do. As a result, in the stretch section, the sheet is conveyed with a difference between the sheet feeding amount (conveying speed) and the sheet sending amount (conveying speed), so that the tension of the sheet is higher than before. It is intended to control the accuracy and keep the winding tension constant. Then, the sheet fed from the original roll, which is the sheet feeding means, is rotated in synchronism with the feeding means (sheet feeding roller), the winding roller is rotated, and the sheet is wound on the winding shaft so that the winding is small. Manufactures sheets (hereinafter referred to as small roll sheets).

  In Patent Document 2, a temperature distribution after the specified time has elapsed in the winding roll is calculated based on a change in environmental temperature that affects the winding roll and a predetermined specified time, and the calculated temperature distribution is calculated. It is disclosed that the internal stress of the winding roll is calculated based on the control and the winding tension is controlled based on the internal stress.

JP2013-184749A JP 2012-188221 A

  When manufacturing small rolls one after another, the speed difference control is performed by repeatedly accelerating, constant, and decelerating the speed of the sheet feed amount in the stretch section for each small roll sheet. In that case, in Patent Document 1, as shown in FIG. 7, in the acceleration region E, the constant speed region F, and the deceleration region G, the ratio of the difference between the sheet feeding amount and the sheet feeding amount (winding amount) is constant. Difference control was performed. However, particularly in the extremely low speed region of the acceleration region E, particularly in the beginning of winding, the absolute value of the difference is small even if the ratio is constant, and winding on the small winding sheet is insensitive to disturbances that cause speed fluctuations. There was a problem of stabilization and wrinkling.

  FIG. 8 shows a typical stress pattern inside the roll in the fixed winding state. FIG. 8A shows the circumferential (tangential) direction stress σs with respect to the radius r of the small roll sheet, and FIG. b) also shows the radial stress σr (interlayer pressure) (reference: introductory web handling P162, FIG. 5-6: first edition issued on October 28, 2010). As shown in FIG. 8A, the circumferential stress σs becomes a minimum near the middle between the core and the outermost periphery, and can be a negative compressive stress with respect to a positive tensile stress. . On the other hand, the compressive stress always acts on the radial stress σr, and the magnitude thereof is maximum at the position of the core and becomes zero at the outermost periphery.

  FIG. 9 is a diagram showing a problem that occurs at the time of winding a roll having the above stress pattern. The star defect (chrysanthemum pattern) shown in FIG. 9A is a buckling phenomenon of a small roll sheet (web) that occurs in a region indicated by diagonal lines where the circumferential stress σs shown in FIG. 8 is compressed. Therefore, it is important to set the winding condition so that compressive stress is not generated in the circumferential direction. The telescope (bamboo shoot) shown in FIG. 9 (b) is a phenomenon that occurs due to interlayer slip with a small interlayer pressure when subjected to a disturbance in the radial direction during roll winding. This phenomenon is likely to occur in a soft winding state, and it is desirable to wind up in a solid winding state to prevent this phenomenon. The gauge band shown in FIG. 9C is a phenomenon in which unevenness occurs in the thickness in the width direction of the small roll sheet (web). This phenomenon is likely to occur in a solid winding state, and it is desirable to wind up in a soft winding state to prevent this phenomenon.

  Therefore, in order to stably wind and improve the yield without wrinkling over the entire region, it is necessary to control the tension according to the winding progress. The above problem becomes more important as the winding speed is higher.

  Patent Document 2 discloses that the winding tension is controlled based on the internal stress of the winding roll based on the change in the environmental temperature that affects the winding roll and the predetermined specified time. The manufacturing time of one small roll sheet is several seconds, and there is no change in the environmental temperature that affects the winding roll. Therefore, the above recognition cannot be obtained.

  An object of the present invention is to provide a sheet winding apparatus and a sheet winding method that can manufacture a small wound sheet by controlling a speed difference in a stretch section and improving a yield.

To achieve the above object, the present invention provides a sheet take-up device or sheet winding method, a winding shaft for winding a sheet sent from the master roll is pressed against the take-up roller, the take-up roller and the original It is provided between the opposite rolls and forms a stretch section by controlling the difference in sheet feeding speed between the sheet feeding roller and the sheet feeding roller that are pressed. The stable speed region controlled at the controlled speed and the deceleration region that decelerates are repeated, speed difference control is performed in each region, the sheet from the raw roll is made into a small roll on the take-up shaft, and a small roll sheet is formed, delaying a predetermined period with respect to the start of the sheet infeed roller to start the acceleration region of the master roll and the sheet feed roller, in the stable velocity area, this to control the feed speed difference between the sheet and change over time The features.

The sheet feed roller is provided between the winding roller and the original fabric driving roller presses the sheet, a stretching section forming roller for forming a stretching section, a sheet infeed roller in the take-up roller Yes, synchronous operation control may be performed so that the sheet feed amount of the original roll and the sheet feed amount of the stretching section forming roller are the same.

  Further, the sheet feeding roller is an original fabric driving roller, and the sheet feeding roller is a stretching section forming roller that presses the sheet and forms a stretching section. It is preferable to control the take-in roller so that the sheet feeding amount is the same.

In the acceleration region, the sheet feed speed difference may be constant.
Furthermore, the sheet feeding speed difference in the stable speed region may be changed and controlled according to the internal stress in the circumferential direction of the small roll sheet or the radius of the small roll sheet.

Further, the change amount of the feed rate difference may be obtained by linear approximation, curve approximation, or stepwise approximation with respect to the elapsed time, and the change rate data of the feed rate difference is empirically or simulated in advance. May be obtained .

Further, data on the start delay time and the change amount of the feed speed difference may be learned based on the quality of the actual production result.

  ADVANTAGE OF THE INVENTION According to this invention, the sheet | seat winding apparatus and sheet | seat winding method which can manufacture the small winding sheet | seat by controlling the speed difference of a tension | tensile_strength section and improving a yield can be provided.

1 shows an overall configuration of a first embodiment of a sheet winding apparatus according to the present invention. It is a figure which shows the 1st Example of this invention, and is the figure which showed typically the component related to a speed difference process part and a speed difference process part. It is a figure which shows the 1st Example of this invention. It is a figure which shows the 2nd Example of this invention. It is a figure which shows the circumferential direction stress with respect to the radius of the small volume sheet | seat in the winding state in Example 2. FIG. FIG. 5 is a diagram schematically illustrating a speed difference processing unit and components related to the speed difference processing unit according to a second embodiment of the sheet winding device of the present invention. It is a figure which shows the prior art which controls a speed difference uniformly in the speed difference ratio in the whole area | region which manufactures a roll of small sheets. It is a figure which shows the typical stress pattern inside the roll in a solid winding state. It is a figure which shows the subject which generate | occur | produces in winding in a solid winding state. It is a figure which shows the width direction state of a small roll sheet.

  Hereinafter, a sheet winding apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following embodiment, the sheet winding apparatus according to the present invention is a sheet having a predetermined width obtained by winding a sheet generally called a web (WEB) such as a low-rigidity plastic film-like sheet. An example of a configuration applied to a so-called rewinder for cutting a sheet into a predetermined length and taking out the sheet by a predetermined length and rewinding the sheet will be described as an example.

(First embodiment)
First, FIG. 1 shows an overall configuration of a first embodiment of a sheet winding apparatus according to the present invention.

  In FIG. 1, a so-called original fabric roller is shown by a reference numeral 10 after a sheet called a web (WEB) is wound around its outer peripheral surface and then cut to a predetermined width. An original fabric driving roller 11 made of, for example, a rigid body such as a metal is disposed in contact with the outer peripheral surface of the original fabric roller 10 by pressing. That is, both ends of the original fabric driving roller 11 are rotatably mounted by a substantially “U” -shaped support member 12, and a pair of original fabric pressure cylinders 13 provided adjacent to each other. Due to the action, the support member 12 and the support member 12 can be moved in the vertical direction in the figure, and are pressed against the outer peripheral surface of the original fabric roller 10 with a predetermined pressure.

  In addition, an original fabric drive motor 14 is provided at a position adjacent to the support member 12, and the output (rotational force) of the motor 14 is, for example, a chain belt provided in two stages (in the figure, one side). (Only the chain belt is shown) is transmitted to the original fabric driving roller 11. That is, the original fabric driving roller 11 is rotationally driven by the motor 14 (see the arrow in the figure). In addition, reference numeral 16 in the drawing is also peeled so as to be pressed and contacted with the outer peripheral surface of the original fabric roller 10 and to rotate together with the conveyance of the original material taken out from the outer periphery of the original fabric roller 10. It is a roller, and has a function of taking out a sheet, which is an original fabric, from the outer periphery of the original fabric roller 10 at a predetermined angle. Similarly, the peeling roller 16 is also arranged at a predetermined position by a support member 17 having a substantially “U” -shaped outer shape.

  Subsequently, the sheet 20 taken out from the outer periphery of the original fabric roller 10 by the above-described configuration is supplied to a so-called turret (TURRET) type sheet winding unit 40 via a so-called intermediate roller 30. The turret-type sheet take-up portion 40 basically has a plurality (eight in this example) between a pair of disk-shaped members 41, 41 facing each other, as indicated by broken lines in the figure. Of backup rollers 42, 42..., Which are independently and freely rotatable, a so-called index device 43, and a plurality of (four in this example) winding shafts provided adjacent to the periphery thereof. 44, 44..., A nip roller 45 that is a stretch section forming roller, a take-up roller 46, and a roll-shaped sheet called a star wheel 50 (hereinafter also referred to as a small roll sheet). 21) is composed of members that are sequentially taken out from the sheet winding unit 40 and moved onto the discharge conveyor 60.

  As an example, the indexing device 43 described above is rotated in a stepwise manner (in this example, 90 degrees in its rotational position at a constant angle in the direction indicated by an arrow in the figure by a drive motor (not shown). ), It is possible to move (index function).

Further, the following rollers are arranged around the index device 43 described above.
First, as shown by a broken line in the figure, a winding leading end winding roller 49 is disposed on the upper portion of the index device 43, and the side portion (the side opposite to the side on which the sheet 20 is supplied) is wound on the winding side. A roller 46 is provided. A nip roller 45 is disposed at an intermediate position between the winding tip winding roller 49 and the winding roller 46. In addition, a so-called cutting blade 80 is provided between the winding tip winding roller 49 and the nip roller 45 to cut the supplied sheet 20 at a predetermined length in a direction perpendicular to the supply direction. It is provided to be movable up and down. Although not shown here, a blow nozzle for blowing air to the sheet 20 supplied with air is disposed at a position facing the cutting blade 80 (for example, inside the index device 43).

  The nip roller 45 is connected to a nip driving motor 72 for rotational driving via, for example, a chain belt, and is driven to rotate at a desired rotational speed. Further, a nip pressure cylinder provided above the nip roller 45 By the action of 75, the sheet 20 to be supplied is sandwiched between and pressed with a predetermined pressure (see the arrow in the figure).

  Similarly, a take-up drive motor 62 is attached to the take-up roller 46, and is thereby driven to rotate at a desired rotation speed. Although not shown here, a winding shaft 44 that presses the winding shaft 44 at a position facing the winding roller 46 from the inner side to the outer side among the winding shafts 44 constituting the index device 43. A pressurizing means composed of a pressure taking cylinder 65 or the like is provided.

  Furthermore, although not shown here, the above-described winding tip winding roller 49 is also provided with a pressure cylinder and a drive motor for driving the roller 49 against the winding shaft 44 with a predetermined pressure for rotation. Yes.

  As shown in FIG. 1, the original fabric drive motor 14 for rotationally driving the original fabric drive roller 11 and the nip drive motor 72 for rotationally driving the nip roller 45 include the former sheet feed amount and the latter. Synchronous operation control is performed so that the sheet feeding amount is the same. The nip drive motor 72 and the take-up drive motor 62 for rotating the take-up roller 46 are controlled so as to rotate with a speed difference, that is, speed difference control is performed. Assuming that the diameters of the raw fabric driving roller 11, the nip roller 45, and the take-up roller 46 for detecting the feedback amount for speed control of each drive shaft are D1, D2, and D3, D1 = D2 <D3, and synchronous operation control and Speed difference control is made easy. Although not shown here, these controls are performed by the operation of a control device that includes, for example, a CPU, a memory, and the like and is capable of high-speed data transfer.

Hereinafter, a speed difference processing unit that controls the speed difference in the stretch section and can manufacture the small roll sheet 21 without wrinkles, which is a feature of the present invention, will be described.
2 shows a sheet feeding means side having the original roll 10a, the original roll 11 and the nip roll 45 in FIG. 1, a sheet feeding means side having a take-up roller 46 and a take-up shaft 44, and embodiments shown below. It is the figure which showed the speed difference process part 100 in 1 and 2 typically. In the following description, each reference sign indicates, for example, C (t) in the case of the elapsed time t, and (t) is not added in the general description.

(Example 1)
First, a first embodiment of the present invention will be described with reference to FIG. Example 1 shows a solution to the problem of instability of the winding speed in the extremely low speed region of the acceleration region E, particularly in the start of winding, when manufacturing the small roll sheet 21 one after another. FIG. 3 shows the sheet feed speed Vi (t) of the take-up roller 46 with respect to the elapsed time t in one roll of the small roll sheet 21 in Example 1, and the original fabric drive roller which is a feed-out side roller that controls the synchronous operation. 11 is a diagram showing a change in the sheet delivery speed Vo (t) of the nip roller 45. FIG.

  When manufacturing the small roll sheet 21 one after another, the speed of the sheet feed amount was repeatedly accelerated, constant, and decelerated in the stretch section for each small roll sheet. Conventionally, as shown in FIG. 7, even in the acceleration region E, the speed difference ratio is controlled to be constant. In the acceleration region E, especially at the beginning of movement, the amount of tension based on the speed difference is too small, so even with a slight slip amount, the winding speed becomes unstable. Deteriorate.

  Therefore, in the first embodiment, in the acceleration region E, the rotation start time of the original fabric driving roller 11 and the nip roller 45 that are synchronously operated on the sheet delivery side is delayed from the rotation start time of the take-up roller 46 by a delay time Tμs and stably. A speed difference C is secured. As a result, even at the start of winding, a constant speed difference C can be secured, and the sheet 21 can be stably wound into small rolls without wrinkles. The delay time Tμs is determined so as to obtain a constant tension by giving a constant speed difference.

In FIG. 3, the delay time Tμs is delayed and then controlled with a constant speed difference. However, the speed difference is increased within a range in which breakage or the like does not occur at the start, or the constant speed difference is maintained at the start. However, the speed difference may be once increased thereafter.
Moreover, in Example 1, the constant speed area | region F and the deceleration area | region G are the same as a prior art.

(Example 2)
Next, the second embodiment of the present invention shows a solution of how to give a speed difference to the problem shown in FIG.

  As shown in the problem, the star defect can be wound in a solid winding state with respect to the telescope and in a soft winding state with respect to the gauge band so that no compressive stress is generated in the circumferential direction. It becomes important. Therefore, first, in Example 2, the speed difference Ch is given to the stretching section so that the circumferential stress σs becomes the tensile stress so that the compressive stress is not generated in the hatched region shown in FIG. . In Example 2, as shown by the horizontal line shown in FIG. 8 (a), in the outer region, the tensile stress (tension), which is the circumferential stress σs of the manufactured small roll sheet, increases. 10 is less likely to buckle in the width direction indicated by the arrow, and wrinkles are less likely to occur. However, since the shrinkage starts after winding on the outer side of the small roll sheet 21, it is necessary to prevent the resulting wrinkles. Therefore, in order to prevent the wrinkle after winding, a speed difference Ct is given to the stretching section so that the circumferential stress σs becomes low enough not to generate a telescope. Further, in the second embodiment, in the predetermined period in the deceleration region G, the minimum speed difference Cm is given to the stretching section so as not to generate the telescope so that the gauge band is not generated.

  The magnitude of the tension applied to the small roll sheet 21 inserted into the winding roller 46 is caused by the speed difference C, and is caused by the internal stress σs in the circumferential direction of the small roll sheet 21. The sum of The tension related to the radius r of the small roll sheet 21 is a value obtained by multiplying the stress σs in the circumferential direction of the small roll sheet 21 by the cross-sectional area of the cross section perpendicular to the circumferential direction of the sheet 20. On the other hand, the winding tension D due to the speed difference C is obtained by multiplying the elastic modulus of the sheet 20 by the length stretched by the speed difference C. Therefore, if the circumferential stress σs related to the radius r of the small roll sheet 21 can be evaluated, the tension related to the radius r of the small roll sheet 21 can be obtained. Based on the change in the tension, the correction amount of the speed difference applied to the tension section to be corrected can be obtained.

  FIG. 4 shows the sheet feed speed Vi (t) of the take-up roller 46 with respect to the elapsed time t in one turn of the small roll sheet 21 in the second embodiment, and the original fabric drive roller 11 which is a feed-out side roller that controls the synchronous operation. FIG. 6 is a diagram illustrating a change in sheet feeding speed Vo (t) of the nip roller 45. FIG. 5 is a diagram illustrating the circumferential stress σs with respect to the radius r of the small roll sheet 21 in the wound state according to the second embodiment. In FIG. 4, the speed difference Cs indicates the maximum speed difference that does not cause the compressive stress, and the elapsed time th indicates the time corresponding to the maximum radius position rh where the compressive stress occurs in FIG.

  In the second embodiment, the speed difference Ch that does not cause compressive stress and the speed difference Ct that is given so that the circumferential stress σs is lowered to the extent that no telescope is generated are approximated in a straight line. In the second embodiment, the winding speed of the sheet 20 by the winding roll 46 is kept constant, the sheet feeding speed Vi is kept constant, and the sheet feeding speed of the nip roller 45 and the original fabric driving roller 11 that are operated synchronously. Vo is changed.

  The winding speed of the sheet 20, that is, the sheet feeding speed Vi slightly changes, but the sheet feeding speed Vo on the side of the synchronous operation is made constant, and the sheet feeding speed Vi of the winding roll 46 is changed. May be. In this case, the sheet take-up speed Vi of the take-up roll 46 is not constant, and thus becomes a non-constant speed region. Since both the constant speed region and the constant speed region are considered to be almost constant speed when viewed from the acceleration region and the deceleration region, they are hereinafter collectively referred to as a stable speed region F, and the constant sign is the same for both the constant speed region and the constant speed region. Append F.

In Example 2 shown in FIG. 4, since the winding speed is kept constant in the stable speed region, the speed difference C is reduced linearly as the radius r of the wound small roll sheet 21 increases. doing. Therefore, the speed difference C (ts) at the first elapsed time ts in the stable speed region F, the sheet delivery speed Vo (ts), the speed difference C (te) at the first elapsed time te in the stable speed region, and the sheet delivery speed. Assuming Vo (te), the sheet delivery speed Vi is a constant speed Vi (ts), and thus the speed difference C (t) at the elapsed time t is expressed by Equation (1).
C (t) = ((C (te) −C (ts)) / (te−ts)) × (t−ts) + C (ts) (1)
However, C (ts) = Vi (ts) −Vo (ts)
C (te) = Vi (ts) −Vo (te)
ts ≪t ≪te
The gradient and initial value of the speed difference in Expression (1) are acquired as data in advance by empirical or simulation based on the theory described above. In actual product production, learning may be performed based on the obtained results until the gradient of the speed difference C and the initial value are stabilized. For example, if buckling can occur near the center of the small roll sheet 21 in the radial direction, the speed difference Ch for correcting the compressive stress is increased. If slip occurs between the layers, the speed difference Ct is set so that the winding becomes more solid. Adjust. By performing this learning, the reliability of the speed difference data is increased and the reliability of the product is also increased.

  In the second embodiment, the speed difference C (t) in the stable speed region F is linearly approximated. However, as indicated by the alternate long and short dash line, a constant speed difference Ch that does not cause the compressive stress is given in the region where the compressive stress is generated. Then, the speed difference Ct may be linearly changed so that the circumferential stress σs becomes low in the outer region of the small roll sheet 21 thereafter. Furthermore, it is good also as curve approximation or stepped approximation.

  According to Example 2, the buckling does not occur in the width direction of the small roll sheet 21 by decreasing the speed difference C in the stretch section as the winding radius r of the small roll sheet 21 increases. In addition, the small roll sheet 21 can be wound without causing wrinkles in the small roll sheet 21 or without breaking the sheet 20.

  In addition, the delay time Tsec shown in Example 1 and the gradient and initial value of the speed difference in Formula (1) in the stable speed region F in Example 2 are the elapsed time after the production of the raw roll 10a, the sheet material Depending on the thickness of the sheet material, the winding speed of the small roll sheet 21, and the like.

Next, returning to FIG. 2, the configuration of the speed difference processing unit 100 in the first and second embodiments will be described.
In the turret type sheet winding apparatus shown in FIG. 1, the winding tension stabilization processing unit 100 includes a speed difference control unit 102 that performs speed difference control between the winding roller 46 and the nip roller 45 and a nip roller 45 as described above. In addition to the synchronous operation control unit 103 that performs synchronous operation control between the roller and the raw material driving roller 11, a speed difference setting unit 101 that determines the speed difference C (t) at the elapsed time t shown in FIGS. Have The elapsed time t is managed by a timer 105 that is reset for each small roll sheet 21.

In each speed control, the speed command values from the speed difference control unit 102 and the synchronous operation control unit 103 are input to the winding motor driving device 62c, the nip motor driving device 72c, and the original fabric motor driving device 14c, and the winding driving motor 62 is input. The nip driving motor 72 and the original fabric driving motor 14 are driven. The feedback signal at this time is detected by the take-up encoder 68, the nip encoder and the original fabric encoder 18 which detect the movement amounts of the outer circumference of the take-up roller 46, the nip roller 45 and the original fabric drive roller 11 whose diameter does not change with time. The Further, each roller is respectively wound by a winding pressure cylinder 65, a nip pressure cylinder 75, and an original fabric pressure cylinder 13, and presses 65a, 75a against the winding shaft 44, the backup roller 42, and the original fabric roll 10a that oppose each other. , 13a, each speed control is performed with high accuracy and stability.
Since each speed control is performed at a high speed, for example, every 2 μs, high-speed data transfer is possible between the speed difference control unit 102 and the synchronous operation control unit 103 and between each encoder and each motor driving device. Perform by communication.

  The memory 104 stores speed difference change data 104a in which initial values and gradients of the speed difference in the stable speed region F are stored for the sheet material, processing speed, and the like, and winding speed data. 104b is already stored, and elapsed time data 104c after the production of the original fabric roll 10a is input. The speed difference setting unit 101 delays the rotation start time on the sheet delivery side by T μs in the acceleration region E for each of the small roll sheets 21, and manages the time difference t by a timer in the stable speed region F. Originally, the speed difference having the speed difference C (t) shown in Expression (1) and the speed difference C in the deceleration region G are set so that the speed difference ratio is constant, and the speed difference control unit 102 is set. To enter. The speed difference control unit 102 calculates a speed designation value for each drive system from the speed difference set value and the winding speed data 10b, and outputs it to each motor drive device. Then, speed difference control and synchronous operation control are performed.

  A thin, low-rigid plastic film-like sheet 20 having a thickness of several tens of μm or less could be wound up without causing wrinkles at a winding speed of 21 m / sec.

  As described above, in Example 1, it is possible to provide the sheet winding apparatus and the sheet winding method that can manufacture the small wound sheet by controlling the speed difference in the stretch section and improving the yield in the sheet winding apparatus of the first embodiment. .

(Second Embodiment)
FIG. 6 shows the overall configuration of the second embodiment of the sheet winding device according to the present invention.
The second embodiment is an example in which the present invention is applied to the so-called drum-type sheet winding device shown in FIG. 6, and schematically shows the speed difference processing unit 110 and components related to the winding tension. FIG. In FIG. 6, the same reference numerals as those in FIG.

  The drum-type sheet winding device is different from the turret-type sheet winding device in FIG. 1 in the following points. First, instead of the nip roller 45 and the backup roller 42 having the turret type drive shaft of FIG. 1, a large-diameter sheet winding drum having a nip roller 45 and a drive shaft, each serving as a stretch section forming roller having no drive shaft. 70 is provided. That is, the stretch section is formed between the original fabric driving roller 11 that is a sheet feeding roller and the nip roller 45 (winding drum 70) that is a sheet feeding roller. Therefore, the speed difference control is performed by inputting the speed command value from the speed difference control unit 102 to the original fabric motor driving device 14c and the drum motor driving device 76c and driving the original fabric driving motor and the drum driving motor 76. .

  Second, the sheet winding is performed by the winding shaft 44 that winds the sheet winding drum 70 by the same amount as the sheet feeding amount of the nip roller 45. Third, since the stretching section is formed between the nip roller 45 (the winding drum 70) and the original fabric driving roller 10, the synchronous operation control referred to in the first embodiment is not necessary. That is, the processing up to the speed difference control unit 102 is the same as that in the first embodiment.

  Although the drum-type sheet winding device of the second embodiment is different from the turret-type sheet winding device of the first embodiment as described above, an extremely low speed region at the beginning of winding of the small-sized sheet 21 with the original fabric roller 10a as a load. The problem that the winding of the sheet becomes unstable and the problem that the winding radius r of the small sheet 21 becomes large are the same.

  Accordingly, the first and second embodiments shown in the first embodiment can be applied to the drum-type sheet winding device of the second embodiment. Similarly to the turret type of the first embodiment, the small roll sheet 21 can be produced with a high yield. A sheet winding apparatus and a sheet winding method can be provided.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, or variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. Including alternatives, modifications or variations.

DESCRIPTION OF SYMBOLS 10: Original fabric roller 10a: Original fabric roll 11: Original fabric drive roller 12: Support member 13: Pressure cylinder 14: Original fabric drive motor 14c: Original fabric motor drive device 16: Peeling roller 17: Support member 18: Original fabric Encoder 19: Linear scale 20: Sheet 21: Small roll sheet 30: Intermediate roller 40: Turret (TURRET) type sheet winding unit 42: Backup roller 43: Indexing device 44: Winding shaft 45: Nip roller 46: Winding roller 49 : Winding tip winding roller 50: Star wheel 60: Unloading conveyor 62: Winding drive motor 62 c: Winding motor driving device 65: Winding pressure cylinder 68: Winding encoder 70: Sheet winding drum 72: Nip driving Motor 72c: Nip motor driving device 75: Nip pressurizing cylinder 76: Drum driving motor 7 6c: Drum motor driving device 78: Nip encoder 80: Cutting blade 100, 110: Speed difference processing unit 101: Speed setting unit 102: Speed difference control unit 103: Synchronous operation control unit 104: Memory 104a: Speed difference change data 104b: Winding speed data 104c: Elapsed time data after manufacture 105: Timer C: Speed differential tension E: Acceleration area F: Stable speed area G: Deceleration area D: Winding tension Vi, Vi (t): Sheet feeding speed Vo , Vo (t): Sheet feed speed r: Radial direction of small roll sheet T: Delay time t: Elapsed time during small roll sheet manufacture σr: Radial stress σs: Circumferential stress

Claims (17)

A winding roller that presses a winding shaft for winding the sheet and winds the sheet around the winding shaft;
An original fabric drive roller that presses an original fabric roll and feeds the sheet;
A sheet feeding roller and a sheet feeding roller, which are provided between the winding roller and the original fabric driving roller, respectively press the sheet, and form a stretch section;
A speed difference control means for forming tension on the sheet in the stretch section by a difference in sheet feeding speed between the sheet feeding roller and the sheet feeding roller;
The rotational speed of the winding roller is repeatedly accelerated in an acceleration region, a stable speed region controlled at a stable speed, and a deceleration region decelerated, and the speed difference control means is controlled to control the sheet from the original roll. Speed difference processing means for forming a small roll and forming a small roll sheet,
The speed difference processing means delays the starting of the raw roll and the sheet feeding roller for a predetermined period with respect to the starting of the sheet feeding roller in the acceleration area, and the difference in sheet feeding speed in the stable speed area. The sheet winding device is characterized in that it is controlled by changing over time .   In the sheet winding apparatus according to claim 1,
  The speed difference processing means controls the sheet feed speed difference in the stable speed region so as to become smaller as time passes. In the sheet winding apparatus according to claim 1 or 2 ,
The sheet feeding roller is a stretch section forming roller that is provided between the winding roller and the original fabric driving roller and presses the sheet to form the stretch section, and the sheet feed roller is The winding roller,
Synchronous operation control is performed so that the sheet feeding amount of the original roll and the sheet feeding amount of the stretching section forming roller are the same.
A sheet take-up device. In the sheet winding apparatus according to claim 1 or 2 ,
The sheet feeding roller is an original fabric driving roller, and the sheet feeding roller is a stretching section forming roller that presses the sheet and forms the stretching section;
The sheet winding device is controlled so that the sheet feeding amount of the stretching section forming roller and the sheet feeding amount of the winding roller are the same. In the sheet winding apparatus according to any one of claims 1 to 4,
In the acceleration region, the sheet feed speed difference is constant.
Sheet winding device characterized in that In the sheet winding apparatus according to any one of claims 1 to 5 ,
The speed difference processing means changes and controls the sheet feed speed difference in the stable speed region according to the internal stress in the circumferential direction of the small roll sheet or the radius of the small roll sheet.
A sheet take-up device. In the sheet winding apparatus according to claim 6 ,
The change amount of the feed speed difference is obtained by linear approximation, curve approximation, or stepped approximation with respect to the elapsed time.
A sheet take-up device. In the sheet winding apparatus according to claim 7 ,
The change amount data of the feed speed difference is obtained empirically or by simulation in advance.
A sheet take-up device. In the sheet winding apparatus according to claim 7 ,
Learning the start delay time, the amount of change in the feed rate difference based on the quality of the actual production results,
A sheet take-up device. Press the take-up shaft that takes up the sheet fed from the raw roll to the take-up roller,
Provided between the take-up roller and the original fabric roll, forming a stretch section by controlling the sheet feed speed difference between the sheet feeding roller and the sheet feeding roller pressed, respectively;
The rotational speed of the winding roller is repeatedly accelerated in an acceleration region, a stable speed region controlled at a stable speed, and a deceleration region decelerated, and the speed difference is controlled in each of the regions. A small roll on the winding shaft, forming a small roll sheet,
The starting of the acceleration region of the original roll and the sheet feeding roller is delayed by a predetermined period with respect to the starting of the sheet feeding roller , and the sheet feeding speed difference is changed over time in the stable speed region. A sheet winding method characterized by:   In the sheet winding method according to claim 10,
  The sheet winding method, wherein the sheet feed speed difference in the stable speed region is controlled to be reduced with time. In the sheet winding method according to claim 10 or 11 ,
The sheet feeding roller is a stretching section forming roller that is provided between the winding roller and the original fabric roll , presses the sheet, and forms the stretching section. A winding roller,
Synchronous operation control is performed so that the sheet feeding amount of the original roll and the sheet feeding amount of the stretching section forming roller are the same.
A method for winding a sheet. In the sheet winding method according to claim 10 or 11 ,
The sheet feeding roller is an original fabric driving roller, and the sheet feeding roller is a stretching section forming roller that presses the sheet and forms the stretching section;
The sheet winding method is characterized in that the sheet feeding amount of the stretching section forming roller and the sheet feeding amount of the winding roller are controlled to be the same. In the sheet winding method according to any one of claims 10 to 13 ,
In the acceleration region, the sheet feed speed difference is constant.
A method for winding a sheet. In the sheet winding method according to any one of claims 10 to 14 ,
According to the internal stress in the circumferential direction of the small roll sheet or the radius of the small roll sheet, the difference is controlled by changing the sheet feed speed difference in the stable speed region,
A method for winding a sheet. In the sheet winding method according to claim 15 ,
The change amount data of the feed speed difference is obtained empirically or by simulation in advance.
A method for winding a sheet. In the sheet winding method according to claim 16 ,
Learning the start delay time, the amount of change in the feed rate difference based on the quality of the actual production results,
A method for winding a sheet.

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