JP2016160083A - Fold generation prevention method in winder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fold generation prevention method in a winder device for preventing generation of fold on a slave paper sheet for forming slave winding thereon, when unwinding paper by a rotary press in order to form slave winding from master winding by the winder device.SOLUTION: Vibration is suppressed in an optional wound diameter region in accordance with a region where fold is generated by a rotary press. When the wound diameter arrives at a constant-speed start diameter, winder speed is set constant, and when the wound diameter arrives at a constant-speed completion diameter, the winder speed is raised by a set winder acceleration up to set speed of the winder, to thereby suppress vibration of the winder.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a winder device for rewinding a winding paper manufactured by a paper machine to a winding having a small width and a small diameter, and that wrinkles are generated when the winding formed in the winder device is unwound by a rotary press. The present invention relates to a wrinkle generation preventing method in a winder device for preventing winders.

  In the paper machine, in order to efficiently produce paper, the paper is produced as a paper sheet, and the paper sheet is wound up on a machine reel to be completed as a wound paper. This web is large in diameter due to its large winding length, and has a large width. If this web is used as it is, it should be used by the user, for example, in a newspaper or a printing factory. I can't. For this reason, in the paper mill, the winding paper is used as the main winding, the winding length is reduced to a small diameter, and the small winding is suitable for use in a printing machine or the like.

  There is a winder device as a device for reworking a parent winding, which is a winding manufactured by winding a paper sheet by a paper machine, into a child winding. In the winder device, the parent paper sheet is traveled while unwinding the supplied main winding, and is passed through a slitter knife, and is cut at a desired position in the width direction of the parent winding to form a small child paper sheet. . A child winding is formed by winding the child paper sheet to an appropriate length.

  The master winder supplied to the winder device is supported by the unwinder, and the master paper sheet is run while unwinding from the master winder, and is cut through a slitter knife to a small width. The reel is wound around a paper tube supported by the drum and the rear drum and supported. When winding the child paper sheet, it is necessary to operate the winder device so that a substantially constant tension is generated. For this reason, a load cell is arranged on the tension roll of the winder device, and the tension generated in the child paper sheet is always detected and monitored, and the child paper sheet is controlled to run with the set tension. If the tension of the child paper sheet fluctuates, the formed child winding may be wrinkled or the traveling child paper sheet may be cut off, which may cause defective products.

  Even when the tension roll and load cell are combined to control the tension to be constant, the generation of wrinkles is prevented by the change in the partial properties of the paper sheet and the relationship with the winder speed. There are cases where it is not possible. Therefore, in Patent Document 1, when a paper web is wound in a slitter winder, depending on the grade of paper such as fine paper or liner paper, the roll rotation speed is in the same region regardless of the running speed of the slitter. There is always a strong vibration peak, and this strong vibration causes interruption of winding, mechanical wear of the device, and roll release from the winding device, which reduces the running speed during winding. In order to reduce the winding capacity because it has to be done, a paper web winding method has been proposed which eliminates or at least minimizes the influence of the vibration region.

  In this paper web winding method disclosed in Patent Document 1, a paper web is wound around a paper roll by a winder or an equivalent machine, and the traveling speed of the winder is related to the vibration of the winder. The winding speed of the paper roll is controlled based on the rotation speed of the paper roll being wound, and the rotation speed of the paper roll being wound is known vibration. When approaching the region, i.e., the rotational speed region of the paper roll being wound, where strong vibrations occur, the rotational speed of the paper roll being wound is reduced to a level lower than the minimum rotational speed of the vibration region. As described above, the traveling speed is rapidly reduced, and thereafter, the rotational speed of the paper roll being wound is kept constant until the original traveling speed of the winder is reached. It is obtained so as to increase the running speed of the Kimakito machine.

  Patent Document 2 discloses a vibration amplitude detection device installed in each part of the web winding device, a comparison device that compares the detected value with a preset vibration amplitude allowable value, and a comparison of the comparison device. There has been proposed a web winding device including a control device that automatically controls the winding speed of the winding device based on the result.

  Patent Document 3 discloses a winder vibration control method that detects abnormal vibration of a winder and prevents a mechanical accident in advance. In this vibration control method, a vibration detection sensor is attached to the winding side, and a signal of the sensor is input to the alarm setting device via the vibration meter, and is preset and stored in the alarm setting device. A reference vibration value and an input value of the vibration are calculated by a calculator, and when the input signal value is equal to or greater than a reference vibration value stored in advance, a signal of the difference is output to the speed controller, The speed controller outputs a deceleration command signal corresponding to the difference signal from the speed controller to adjust the winder speed.

Japanese Patent No. 3857399 JP-A 63-267650 JP-A-6-80289

  All of the inventions disclosed in Patent Documents 1 to 3 described above are intended to prevent the winder device from generating vibrations and to protect the winder machine. The vibration generated in the winder device is a cause of wrinkles when the coil winding is used in the rotary press, and it is preferable to prevent the winder from vibrating.

  However, the paper web winding method disclosed in Patent Document 1 reduces the rotation speed of the paper roll to a level lower than the minimum rotation speed of this vibration area when approaching a known winder vibration area. Whether or not it has approached the vibration region is determined by whether or not the paper roll being wound enters a rotation speed region that generates strong vibration. For this reason, the known winder vibration region can be expected to prevent the occurrence of vibration as machine protection of the winder device, but it is difficult to suppress wrinkles in the rotary press.

  Further, the web winding device disclosed in Patent Document 2 is based on the result of comparing the detection value by the vibration amplitude detecting device installed in each part of the web winding device with a preset vibration amplitude allowable value. It controls the taking speed. For this reason, when the vibration amplitude exceeding the allowable value occurs, the vibration is suppressed, and generation of wrinkles due to the vibration can be prevented. Further, in the winder vibration control method disclosed in Patent Document 3, the winder vibration is detected by a vibration sensor, the vibration value is compared with a reference vibration value, and the winder is decelerated according to the comparison result to vibrate. The generation of wrinkles due to vibrations can be prevented. However, the devices disclosed in these references 2 and 3 are for winder equipment maintenance, and are difficult to function for suppressing vibration in a region where wrinkles are generated in a rotary press.

  It is known that the occurrence of vibration is suppressed and prevented by reducing the winder speed, and as disclosed in the cited documents 1 to 3, the vibration is reduced by decelerating for the purpose of machine protection. Occurrence is suppressed.

  Therefore, the present invention can suppress the generation of wrinkles not only when vibration is generated in the winder but also when the winding is used in a rotary press, and can form a winding that does not generate wrinkles. It is an object of the present invention to provide a method for preventing wrinkling in a winder apparatus.

  As a technical means for achieving the above object, a method for preventing wrinkle generation in a winder device according to the present invention uses a parent sheet unwound from a paper wound as a parent paper sheet, and the parent paper sheet is used as a slitter. In a winder device that forms a small child winding through a knife, the winder speed is constant when the winding diameter of the child winding being formed reaches a preset dimension.

  In the case of forming the child winding with the winder device, vibration may occur depending on the winding diameter of the child winding. For this reason, when the winding diameter becomes a size that generates wrinkles in a rotary press, the generation of wrinkles is suppressed by keeping the winder speed constant. When there are multiple winding diameters for generating wrinkles, the winder device is decelerated or set at a constant speed as required according to the winding diameter. Also, the speed once reduced may be increased. Then, it operates at a steady speed to form the child winding.

  Further, the winding diameter for making the speed constant may be set in advance according to the paper quality or brand of the paper sheet provided to the winder device.

  The wrinkle generation preventing method in the winder apparatus according to the invention of claim 2 is characterized in that the winding diameter of the child winding is set in advance at each of the start time and the end time to make the winder speed constant.

  That is, the winder speed is made constant when the winding diameter of the sub-winder reaches a predetermined dimension while the winder speed is increasing, and is increased again when the winding diameter becomes a predetermined dimension during this constant speed operation. To control.

  According to a third aspect of the present invention, there is provided a method for preventing wrinkle generation in a winder device, wherein the vibration value in the rear drum measured in the dimension region of the winding diameter at the start and end of the winder speed being constant is less than 10.0 μm. The winder speed is set so that

  That is, the start time and the end time are set such that the vibration value of the rear drum during constant speed operation of the winder is less than 10.0 μm.

  According to the wrinkle generation preventing method in the winder apparatus according to the present invention, it is possible to prevent the occurrence of steady wrinkles with a simple structure by measuring the winding diameter of the winding, so that it can be easily installed in an existing apparatus. I can do it.

1 is a schematic side view of a winder device equipped with a device for realizing a wrinkle generation preventing method according to the present invention. It is a figure for demonstrating the wrinkle generation | occurrence | production prevention method which concerns on this invention, and shows the acceleration condition of the winder which set the winding diameter to the winder speed on the vertical axis | shaft, and the horizontal axis | shaft.

  The wrinkle generation preventing method in the winder device according to the present invention will be described below based on the preferred embodiments shown in the drawings.

  FIG. 1 is a view for explaining the schematic structure of a winder apparatus provided with an apparatus for realizing the wrinkle generation preventing method according to the present invention. The winder device 1 supports a winder manufactured by a paper machine on an unwinder 11 as a master winder W, travels a parent paper sheet S while unwinding from the master winder W, and passes a slitter knife 12 to make a desired winding. The small child paper sheet Sn is cut, and the child paper sheet Sn is wound around a paper tube supported by the front drum 13 and the rear drum 14 to form a child winding U. Tension is applied to the child paper sheet Sn by a tension roll 15 and adjusted. A plurality of tension rolls 15 are arranged corresponding to each width of the small paper sheets Sn cut by the slitter knife 12, and load cells 16 are arranged corresponding to the respective tension rolls 15. Yes.

  The wrinkle generation preventing method according to the present invention configured as described above will be described below.

  When the paper sheet S unwound from the main winder W provided to the unwinder 11 passes through the slitter knife 12, it is cut in the running direction to form a small child paper sheet Sn. It passes through and is fed to the front drum 13.

  Furthermore, the drive control device 22 of the winder device 1 is input with the dimension of the winding diameter of the child winding U. When the winding diameter becomes equal to a preset dimension, the output speed of the drive motor is made constant and the winder speed is made constant. FIG. 2 is a diagram for explaining this drive control, and shows the relationship between the winding diameter and the winder speed by setting the winder speed on the vertical axis and the winding diameter on the horizontal axis. A portion indicated by a broken line indicates a case where the winder speed is constantly accelerated, and shows an operation state in which the winder speed is gradually increased from 0 mm and the winder speed is constant at 2000 m / min. In contrast to this constant acceleration operation, in the wrinkle generation preventing method according to the present invention, as shown by the solid line in FIG. The vehicle is decelerated with respect to the operation and is operated at a constant speed until a predetermined winding diameter is obtained. After the winding diameter reaches 350mm, which is the speed increase setting dimension, the wind speed is increased to a winder speed of 2000m / min at a constant acceleration. Thereafter, the child paper sheet Sn is wound at a set speed until a winding diameter that can be shipped is formed, and the child winding U is formed.

  In FIG. 2, the case where the winder speed is controlled to be constant at a constant speed start setting dimension of 230 mm and increased at a constant speed end dimension of 350 mm has been described. For example, there are a plurality of winding diameters that generate wrinkles. When the dimensions are present, it is possible to perform constant speed control in two or more stages. The constant speed start set dimension is preferably 150 mm to 300 mm, and the constant speed end set area is preferably 300 mm to 500 mm.

  According to the wrinkle generation preventing method in the winder apparatus according to the present invention, it contributes to a reduction in the wrinkle generation rate after the child winding is shipped to the printing shop.

W Winding U Child winding S Parent sheet Sn Child sheet 1 Winder device
11 Unwinder
12 Slitter knife
13 Front drum
14 Rear drum
15 Tension roll
16 Load cell

Claims (3)

In a winder device that forms a small child winding through a slitter knife, a parent sheet unrolled from the paper-made winding is used as a parent paper sheet.
A wrinkle generation preventing method in a winder device, characterized in that a winder speed is constant when a winding diameter of the child winding in the middle of formation reaches a preset dimension.   2. The method for preventing wrinkle generation in a winder device according to claim 1, wherein a winding diameter of the child winding at each of the start and end of setting the winder speed to a constant speed is set in advance.   The winder speed is set so that the vibration value in the rear drum measured in the dimension region of the winding diameter at the start and at the end when the winder speed is made constant is less than 10.0 μm. Method for preventing wrinkles in a winder apparatus.

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