JP2009120278A - Torque controller of paper payoff reel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that the tension of a paper sheet does not become zero even when set at zero unless a mechanical friction torque is corrected because a paper payoff device including its own mechanical friction torque applies tension to the paper sheet. <P>SOLUTION: When the paper sheet of the paper payoff is inserted into a winding coil, a static friction torque is corrected. Once it is started, a friction torque correction is switched to correct a dynamic friction torque and gradually the torque for setting tension of the paper is raised through a change rate controller. Also, a paper payoff reel is inched to unwind the paper sheet continuously in the same mode while tension is applied to the paper. When the controller of the paper payoff reel is activated to tension, the static friction torque is corrected in the case where the paper payoff reel is static, and the paper can be unwound only by slightly pulling it as the tension of the paper is set at zero. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paper payoff reel that supplies paper to be inserted into a winding coil.

The paper payoff reel unwinds a paper coil that supplies a paper sheet to be inserted into a winding coil of a metal processing process line, and supplies paper.
1. Even if the supplied paper sheet is cut, it does not rotate in the winding direction.
2. It is only necessary that the paper be tensioned when the paper sheet is pulled by the winder.
In order to satisfy these characteristics, brake devices such as powder brakes have been used.

  However, for the purpose of braking only, when inserting a paper sheet into the coil of the winder, if there is a slack in the paper sheet to be inserted, the paper sheet suddenly stretches as soon as the paper sheet is inserted into the winder coil. There was a drawback that the sheet was easy to cut.

In addition, it is necessary to loosen the brake in order to insert the paper sheet into the coil of the winder.
JP 2003-221149 A

  The problem to be solved is that the paper payoff device will be the tension of the paper sheet, including the mechanical friction torque of the device itself, so if the mechanical friction torque is not corrected, the paper sheet tension will be reduced even if the paper sheet tension is set to zero. This tension is not zero.

  According to the first aspect of the present invention, the negative fixed voltage from the first setter that sets a value for detecting the presence or absence of rotation is compared with the feedback voltage corresponding to the rotation speed of the motor, and the first setter Corresponding to a comparator whose output is 1 when the feedback voltage corresponding to the rotational speed of the motor is small, a second setting device for setting a torque corresponding to static friction, and a feedback voltage corresponding to the rotational speed of the motor A function generator that functions as a voltage corresponding to dynamic friction, a switch that switches the output of the second setter and the output of the function generator by the comparator, an operation command of the motor and the output of the comparator simultaneously. A first contact that inputs an output of a third setting device that sets a torque in the paper winding direction at the time of 1, a change rate limiter that receives the output of the first contact, and a change rate limiter An adder for adding the output voltage and the output voltage of the switch, and paper The difference between the fourth setter for setting the jogging rotational speed in the take-out direction and the feedback voltage corresponding to the rotational speed of the motor is limited to a voltage that is smaller than the output voltage of the controller 1 that proportionally integrates and the adder. The output of the limiter that outputs the voltage is input to the inverter as an inverter torque command, and the motor is controlled via the inverter calculator to transmit the torque to the mechanically coupled paper payoff reel. And

That is, the present invention corrects the static friction torque when inserting a paper payoff paper sheet into the take-up coil, and once started, switches the friction torque correction to correct the dynamic friction torque, and the paper tension. Increase the torque gradually through the change rate limiter. In addition, the main feature is that the paper payoff reel is moved and the paper sheet is unwound continuously in the same mode while tension is applied to the paper sheet.

  When the tension of the paper payoff reel control device of the present invention is activated, the static friction torque is corrected when the paper payoff reel is stationary, and the tension setting of the paper sheet is zero. The paper can be unwound simply by pulling the paper sheet.

  When the paper sheet is inserted into the winder coil and the paper sheet begins to be unwound at the winder speed, the paper sheet tension setting torque gradually increased from zero through the rate of change limiter and switched from stationary to dynamic. Further, since the torque added with the friction torque correction is applied to the paper sheet, there is no sudden tension change of the paper sheet, and cutting of the paper sheet can be prevented. Further, since the friction torque correction is provided, the tension of the paper sheet and the tension on the paper sheet can be set to the same value regardless of whether the friction torque of the machine is large or small.

  Further, the paper sheet can be unwound by the inching operation of the motor with the tension activated, and it is not necessary to switch the paper payoff between the tension activation and the inching mode, and continuous operation is possible.

  Mechanical friction torque correction for paper pay-off paper sheets is switched to the optimum friction torque correction by rotating and stopping the paper pay-off reel to prevent excessive tension on the paper sheets and the paper sheet unwinding dimensions. It is possible to perform the movement while maintaining the tension operation of the paper payoff reel.

  FIG. 1 is a block diagram showing an embodiment of the apparatus of the present invention.

In FIG. 1, the torque of the inverter 13 is positive in the paper winding direction of the paper payoff reel.
When contact 2 of the paper tension operation command is output 1, the inverter 13 starts, but the paper payoff reel is not rotating, so the switch 16 is switched to the setting device 5 side (static friction torque) corresponding to static friction. Since both the contact 2 of the paper tension operation command and the contact 14 of the reverse jogging command are not outputs 1, only the setting of the setting device 5 corresponding to static friction is the torque command of the inverter 13.

  Next, when the paper sheet is pulled by hand in the unwinding direction, or when it is reversely jogged by the contact 14 of the reverse jogging command, the comparator 3 for detecting rotation becomes the output 1 and the switch 16 applies a voltage corresponding to dynamic friction. The dynamic friction torque correction of the function generator 6 that has been converted into a function is output to the limiter 12, and at the same time, the output of the setting device 1 that sets the torque in the paper winding direction gradually increases through the change rate limiter 10.

Here, the limiter 12 is limited to a smaller value side. Therefore, in the case of reverse jogging, the output of the controller 8 for proportional / integration is a negative voltage, and the inverter 13 is a controller for proportional / integral. When the paper sheet is inserted into the winder coil, the jogging operation is stopped or the winding speed becomes larger in absolute value than the jogging speed. Since the output of the controller 8 for proportional / integration is saturated, the adder 11 outputs the torque of the inverter 13. Further, the friction torque is corrected by the output of the switching device 16, and the tension of the paper sheet becomes a value proportional to the voltage of the setting device 1 for setting the torque in the paper winding direction.

  On the other hand, even when the paper sheet is cut, since there is a comparator 3 that detects rotation, when the rotation speed becomes higher than the speed of the setting device 4 corresponding to the rotation speed that shifts from static friction to dynamic friction, the inverter The torque command of 13 becomes only the static friction torque correction, so that the rotation is stopped and the paper payoff reel can be prevented from rotating in the winding direction.

  The configuration of the present invention can also be applied to a case where the roll cannot be reversed due to mechanical limitations, or to an application where torque should not be output when the roll is stopped.

The figure explaining the structure of one Example of this invention apparatus is shown. The figure explaining the structure of a prior art example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Setting device which sets torque of paper winding direction 2 Contact point of paper tension operation command 3 Comparator which detects rotation 4 Setting device which corresponds to the number of rotations which shifts from static friction to dynamic friction 5 Setting device which corresponds to static friction 6 Dynamic friction Function generator that functionalizes the corresponding voltage
7 Setting device for setting the number of rotations in the paper unwinding direction 8 Controller for proportional / integrating 9 Contact for inputting paper tension setting 10 Change rate limiter 11 Adder 12 Limiter 13 Inverter 14 Contact for reverse jogging command 15 Paper tension operation Contact point which becomes output 1 by command or reverse jogging command 16 switch

Claims (1)

A negative fixed voltage from the first setter that sets a value for detecting the presence or absence of rotation is compared with a feedback voltage corresponding to the rotation speed of the motor, and the rotation speed of the motor is determined from the first setter. A comparator whose output is 1 when the corresponding feedback voltage is small, a second setting device for setting a torque corresponding to static friction, and a voltage corresponding to dynamic friction corresponding to the feedback voltage corresponding to the rotational speed of the motor A function generator obtained by functionalizing, a switch for switching the output of the second setter and the output of the function generator by the comparator, and an operation command of the motor and the output of the comparator at the same time. A first contact for inputting an output of a third setter for setting a torque in the paper winding direction, a change rate limiter for receiving the output of the first contact, and an output voltage of the change rate limiter; Adder for adding the output voltage of the switch, and inching in the paper unwinding direction A controller for proportionally integrating the difference between the fourth setter for setting the rotation number and the feedback voltage corresponding to the rotation speed of the motor, and a limiter for outputting a voltage limited to a smaller voltage among the output voltages of the adder Is output to the inverter as a torque command for the inverter, and the torque is transmitted to a mechanically coupled paper payoff reel by controlling the electric motor through the arithmetic unit of the inverter. Paper payoff reel control device.

Images