JP2003292215A - Film winding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film winding device capable of properly selecting control style which is suitable to the kind of a film and providing the high-quality winding attitude. <P>SOLUTION: When speed control system is selected by an instruction device 19, a controller 18 makes a clutch 14 operate, cuts off a feed roller 5 from a feed roller driving motor 15, controls a winding shaft driving motor 17 in the speed pattern set beforehand based on the speed detected by a speed detection device 16 in this state, and controls a driving motor 12 so that the tension given to the wound film becomes constant. When torque control system is selected by the instruction device 19, the controller 18 makes the clutch 14 operate, makes the feed roller 5 connect to a feed roller driving motor 15, controls the feed roller driving motor 15 in the speed pattern set beforehand, and controls the winding driving motor 17 so that the tension given to the wound film becomes constant. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film winding device. 2. Description of the Related Art In a process of winding a thin film such as an ink ribbon fed from a raw roll onto a winding shaft such as a bobbin, it is necessary to keep the tension applied to the film at the time of winding as constant as possible. Is required. This is because if the tension is high, the film will be stretched or wrinkled, and if the tension is low, the film will be loosened or meandering, and as a result, the quality of the roll will be reduced. [0003] To take up the tension uniformly, a "speed winding" (speed control system) is used in which the winding shaft is rotated in a predetermined speed pattern while the tension of the film to be wound is kept constant by a dancer roller. In addition, the "torque winding" controls the rotation of the winding shaft by controlling the torque of the winding shaft so that a constant tension is applied to the film to be wound, and the rotation of the feed roller so that the film feeding speed becomes a predetermined pattern. (Torque control system). Any one is appropriately selected depending on the thickness and width of the film to be wound. [0004] By the way, conventionally, at the time of designing a winding device, either "speed winding" or "torque winding" is selected. In order to change the control mode from "speed winding" to "torque winding" or from "torque winding" to "speed winding" with the change of the width, a major modification of the device was required. An object of the present invention is to provide a film winding device capable of appropriately selecting a control mode suitable for a kind of film and obtaining a high quality winding appearance. The present invention relates to a film winding device for winding a film around a winding shaft.
An unwind motor that rotates and drives the counter roll, feeds a film, a dancer roller that applies tension to the film fed from the roll, a position detector that detects the position of the dancer roller, and a A variable tension mechanism that changes the tension applied to the film by changing the pressing force,
A feed roller that rotates in contact with the film fed from the material roll, a speed detection device that detects the rotation speed of the feed roller, a feed roller drive motor connected to the feed roller via a clutch, A take-up shaft drive motor for rotating the take-up shaft, a control device for controlling the unwind motor, the variable tension mechanism, the feed roller drive motor, and the take-up shaft drive motor, and whether the film is wound by a speed control system or torque controlled. An instruction device that can select whether to wind up by a system, the control device, when a speed control system is selected by the instruction device, operates the clutch to disconnect the feed roller from the feed roller drive motor, In this state, the winding shaft drive motor is operated based on the speed detected by the speed detecting device. To drive control by a predetermined speed pattern data, tension applied to the film controls the tension variable mechanism to be constant,
Further, when the torque control system is selected by the indicating device, the control device operates the clutch to connect the feed roller to the feed roller drive motor, and controls the feed roller drive motor with a predetermined speed putter. In addition to the drive control, the drive of the winding shaft drive motor is controlled so that the tension applied to the film is constant. Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a film winding device to which the present invention is applied. In the film take-up device 1 shown in the figure, a thin film 3 such as an ink ribbon fed out from a raw roll 2 is taken up by a take-up shaft 6 such as a bobbin through a dancer roller 4 and a feed roller 5. .
Guide rollers 7 and 8 are arranged in the transport path of the film 3, and a feed roller 5 is provided with a press roller 9 that is rotatable with the film 3 interposed therebetween, and presses the film 3 against the feed roller 5. The raw roll 2 is provided with an unwind motor 10.
Is driven to rotate. The dancer roller 4 is rotatably supported at the tip of an arm 11, and the arm 11 is fixed to a rotation shaft of a drive motor 12. Accordingly, by controlling the driving force of the drive motor 12, the force applied to the film 3 can be changed by changing the pressing force of the dancer roller 4 against the film 3, and a tension variable mechanism is configured. The position of the dancer roller 4 is detected by the position detecting device 13. The feed roller 5 is appropriately connected to a feed roller drive motor 15 via a clutch 14. Further, a speed detecting device 16 such as an encoder is connected to the rotation shaft of the feed roller 5 so that the rotation speed of the feed roller 5 is detected. The take-up shaft 6 is driven to rotate by a take-up shaft drive motor 17 such as a servomotor. As shown in FIG. 2, the detection signals from the position detecting device 13 and the encoder 16 are
And the control device 18 causes the unwind motor 10, the drive motor 12, the clutch 14, the feed roller drive motor 15, the take-up shaft drive motor 17
Is driven and controlled as described later. Also, the control device 1
Reference numeral 8 is connected to an indicating device 19 which can select whether to wind the film 3 by a speed control system (speed winding) or a torque control system (torque winding). Next, the contents of control by the control device 18 will be described. First, "speed winding" is performed by the pointing device 19.
The case where is selected will be described. In this case, the control device 18 operates the clutch 14 to disconnect the feed roller 5 from the feed roller drive motor 15, and in this state, controls the winding shaft drive motor 17 in advance based on the speed detected by the speed detection device 16. Drive control is performed so as to achieve the determined speed pattern. At this time, the take-up speed of the film 3 is determined by the rotation speed of the take-up shaft drive motor 17. Is detected, and the detection signal is fed back to the control device 18 so that the winding shaft drive motor 17 is accurately driven and controlled in a predetermined speed pattern. The tension applied to the film 3 during winding is determined by the drive motor 12. In other words, the rotational torque of the drive motor 12 is controlled so that the torque applied to the film 3 via the dancer roller 4 becomes the torque required for winding. The unwind motor 10 is driven and controlled to unwind the film 3 having the same length as the film 3 wound on the winding shaft 6 so that the position of the dancer roller 4 detected by the position detecting device 13 does not change. You. On the other hand, a case where "torque winding" is selected by the instruction device 19 will be described. In this case,
The control device 18 operates the clutch 14 to connect the feed roller 5 to the feed roller drive motor 15 and controls the drive of the feed roller drive motor 15 so as to have a predetermined speed putter. Therefore, the winding speed of the film 3 is determined by the rotation speed of the feed roller drive motor 15. Further, the winding shaft drive motor 17 is torque-driven controlled so that the tension applied to the film 3 being wound is constant. That is, the tension applied to the film 3 during winding is determined by the torque of the winding shaft drive motor 17. Here, the torque control by the winding shaft drive motor 17 will be described in more detail. In the winding torque control by the winding shaft drive motor 17, an outer diameter correction torque TA for correcting an increase in the winding outer diameter of the winding shaft 6, an angular acceleration correction torque TB, and a control of the winding drive motor 17. It is preferable to consider the internal loss torque TC for correcting the internal loss. The outer diameter correction torque TA applies a drive torque proportional to the winding diameter of the winding shaft 6 to the winding shaft drive motor 17 in order to apply a constant tension to the film 3 during winding. It is for. For this, the film diameter is calculated by adding the film thickness for each rotation of the winding shaft 6, and the winding diameter is adjusted so that the winding torque is constant with respect to the winding diameter that changes according to the winding. Is controlled so that the driving torque decreases as the value increases. The angular velocity correction torque TB is determined by the rotation of the winding shaft motor 17, the winding shaft 6, and the wound film 3.
It is the torque required to accelerate and decelerate the inertia of the rotating part such as These are obtained by multiplying the total value of the inertia of the rotating part by the angular acceleration of the rotating part. The rotation unit angular acceleration can usually be obtained by calculation from the speed pulse of the speed detection device 16 connected to the feed roller 5, but generates a speed command pulse to the feed roller drive motor 15 in the control device 18. By reading the current speed data from the control IC, control with good responsiveness can be performed. The internal loss torque TC is a correction torque that is applied because the internal loss of the winding shaft motor 17 increases as the rotation speed of the motor increases. The rotation speed and the loss inside the motor can be determined as appropriate by experiments and the like. In the case of "torque winding", the drive motor 1
2 is controlled so as to apply the same tension to the film 3 as the tension applied to the film 3 by the winding shaft drive motor 15 so that no slippage occurs between the feed roller 15 and the film 3. The unwind motor 10 has the same length as the film 3 wound on the winding shaft 6 so that the position of the dancer roller 4 detected by the position detecting device 13 does not change, as in the case of “speed winding”. Drive control is performed so as to feed out the film 3. As described above, according to the above-described embodiment, the "speed winding" and the "torque winding" can be appropriately selected and used in the same device by the input from the instruction device 19, and the speed winding and the torque winding can be selected according to the film to be wound. The most suitable control mode can be selected by the user, and can be changed later. Therefore, a control mode suitable for the type of the film 3 can be appropriately selected, and a high-quality winding appearance can be obtained. Although the embodiment has been described by taking an ink ribbon as an example of a film, the present invention is not limited to this and can be widely applied to materials that need to be wound with a constant torque. According to the present invention, a control mode suitable for the type of film can be appropriately selected, and a high-quality winding appearance can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a film winding device to which the present invention is applied. FIG. 2 is a control block diagram of the film winding device of FIG. [Description of Signs] 1 Film take-up device 2 Raw material roller 3 Film 4 Dancer roller 5 Feed roller 6 Take-up shaft 7 Guide roller 8 Guide roller 9 Holding roller 10 Unwind motor 11 Arm 12 Drive motor (variable tension mechanism) 13 Position Detecting device 14 Clutch 15 Feed roller driving motor 16 Speed detecting device (encoder) 17 Winding shaft driving motor 18 Control device 19 Pointing device

Claims (1)

Claims: 1. A film winding device for winding a film around a winding shaft, comprising: an unwind motor for rotating and driving a counter roll to feed the film; and a film unrolling from the roll. A tensioner that applies tension to the film, a position detecting device that detects the position of the dancer roller, a variable tension mechanism that changes the tension applied to the film by changing the pressing force of the dancer roller against the film, A feed roller that rotates in contact with the rolled film, a speed detection device that detects a rotation speed of the feed roller, a feed roller drive motor that is connected to the feed roller via a clutch, and that rotationally drives the winding shaft. A winding shaft drive motor, and the unwind motor A control device for controlling a motor, a variable tension mechanism, a feed roller drive motor, and a take-up shaft drive motor; and an indicating device capable of selecting whether the film is to be wound by a speed control system or a torque control system. When a speed control system is selected by the indicating device, the device operates the clutch to disconnect the feed roller from the feed roller drive motor, and in this state, winds up based on the speed detected by the speed detection device. The drive control of the shaft drive motor is performed in a predetermined speed pattern, and the tension variable mechanism is controlled so that the tension applied to the film is constant. When selected, the clutch is operated to move the feed roller to the feed row. Connected to the drive motor, and the drive control of the feed roller drive motor with a predetermined speed putter, and the drive control of the winding shaft drive motor such that the tension applied to the film is constant. Film winding device.