JPH03264454A - Dancer roll control device - Google Patents

Abstract

PURPOSE:To prevent a large work loss due to the stop of a winder by charging a dancer roll compensating circuit at the turret time of a winder so as to perform dancer roll control without a dancer roll reaching its upper limit. CONSTITUTION:When a turret is started by the rewinding of a winder, a dancer roll compensating circuit 16 is charged by its on-off signal. Then the loop length fluctuation quantity generated by the turret, that is, the dancer roll position fluctuation quantity, is computed at the dancer roll compensating circuit 16 from the output signal of a turret speed detector 14, the set value of a turret diameter setter 15 and the take-up diameter signal of a take-up diameter detecting circuit 7 so as to output a signal for changing the dancer roll position to that corresponding to the dancer roll fluctuation quantity. The output signal of the dancer roll compensating circuit 16 is added to the set value of a dancer roll position reference setter 11, and this signal is to be the dancer roll position reference set value of a dancer roll control circuit 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a dancer roll control device for a winding machine for sheet materials, etc.

(Prior art) In the conventional technology, compensation control for the movement of the winding shaft by a turret or the like during rewinding of the winding machine is not performed, and response control of the dancer roll is not performed due to the quality of the product. Since the loop length is set within the range of
Roll control may not respond and malfunctions may occur.

(Problem to be solved by the invention JIJ) In other words, the dancer roll is pulled up due to fluctuations in the loop length due to the movement of the winding shaft, and the dancer roll position reaches its upper limit. The worst case scenario is that the machine has to stop, resulting in a huge loss of work.

The present invention has been made based on the above reasons, and provides a dancer roll control device that can perform dancer roll control so that the dancer roll fluctuation position caused by the fluctuation of the loop length due to the movement of the winding shaft does not reach the upper limit. provide.

[Structure J of the Invention (Means for Solving the Problems) The present invention relates to a winding machine having a dancer roll at the front stage and moving a winding shaft by using a turret for rewinding, and a turret of this winding machine. A turret speed detector that detects speed and outputs a signal corresponding to the speed, a turret diameter setting device that sets a mechanically determined turret diameter, and a winding diameter detection circuit that generates a signal that corresponds to the winding diameter. and a dancer roll that calculates a dancer roll position variation amount based on the output signal of the turret speed detector, the setting value of the turret diameter setting device, and the winding diameter signal of the winding diameter detection circuit and outputs a dancer roll position signal. A dancer roll control device comprising a compensation circuit, an addition circuit for adding an output signal of the dancer roll compensation circuit to a dancer roll control circuit, and an on/off signal circuit for turning on and off the dancer roll compensation circuit at the time of the turret. be.

(Function) During normal winding operation, that is, when the turret is not operating, the dancer roll compensation circuit hole/cut signal
The roll compensation circuit is disconnected, and the dancer roll is controlled at a steady position corresponding to the set value of the dancer roll position reference setter.

On the other hand, when the turret is started by rewinding the winder, the dancer roll compensation circuit is turned on by the dancer roll compensation circuit hole/off signal, and the output signal of the turret speed detector and the setting of the turret diameter setting device are set. The loop length variation due to the turret, that is, the dancer roll position variation is calculated from the winding diameter signal of the winding diameter detection circuit and the dancer roll compensation circuit, and the dancer roll compensation circuit calculates the dancer roll position variation amount corresponding to the dancer roll variation amount. A signal is output to change the position.

The output signal of the dancer roll compensation circuit is
It is added to the set value of the dancer roll position reference setting device, and the added signal becomes the dancer roll position reference set value of the dancer roll control circuit, and performs dancer roll control so that the dancer roll does not reach the upper limit. Also, when the turret is finished, the dancer roll compensation circuit is disconnected by the dancer roll compensation circuit hole/off signal, so the dancer roll compensation circuit is disconnected at the steady position corresponding to the dancer roll position reference setting device, just like during normal winding operation. Dancer roll controlled.

(Example) Next, an example of the present invention will be described. Figure 1 shows a winding machine 2 which is equipped with a dancer roll 8 in the front stage and moves a winding shaft 3 by using a turret for rewinding, and which detects the winding machine's turret speed and outputs a signal corresponding to the speed. A turret speed detector 14 that outputs, a turret diameter setting device 15 that sets a mechanically determined turret diameter, a winding diameter detection circuit 7 that generates a signal corresponding to the winding diameter 2, and a turret speed detector. 14 output signal 14a and turret diameter setting device 15
a dancer roll compensation circuit 16 that calculates a dancer roll position variation amount based on the set value of and the winding diameter signal 7a of the winding diameter detection circuit 7 and outputs a dancer roll position signal 16a; and a dancer roll compensation circuit 16. The figure shows a dancer roll control device comprising an adder circuit 18 for adding the output signal of 1 to the dancer roll control circuit 10, and an on/off signal circuit 17 for turning on/off the dancer roll compensation circuit 16 at the time of the turret.

That is, 7 is a sheet material to be wound up, 2 is a two-shaft tower type winder 3 is a winding shaft for winding the sheet material, 4 is a winding shaft drive device for driving the winding shaft, and 5 is a winding shaft. A take-up shaft control device that controls the rotation speed of the take-up shaft 3 by controlling the rotation speed of the take-up shaft drive device 4, 6 a speed setting device that sets the rotation speed of the take-up shaft 3, and 7 a take-up shaft. A well-known winding shaft winding diameter detection circuit detects the winding diameter of the winding shaft 3, which is a correction signal for keeping the winding shaft surface speed constant with respect to the set speed of the speed setting device 6, that is, the winding diameter of the winding shaft 3. It outputs a signal corresponding to the diameter of the sheet material 1, and 8 is a dancer roll having a mechanism that moves up and down in response to the tension of the sheet material 1. Reference numeral 9 denotes a dancer roll position detector which is attached to the dancer roll 8 and outputs a signal corresponding to the position of the dancer roll 8, and is, for example, a sershin oscillator.

10 receives the output signal of the dancer roll position detector 9;
The winding shaft winding diameter detection circuit 7 corresponds to the position of the dancer roll 8.
11 is a dancer roll control circuit that generates a signal to correct the rotation speed of the winding shaft 3 in response to the command from the speed setting device 6 corrected by the output signal of the dancer roll 8; A roll position reference setter 12 is an amplifier that compares the correction amount of the dancer roll 8, that is, the output signal of the dancer roll position detector 9, and the set value of the dancer roll position reference setter 11, and amplifies the deviation. is the winding shaft 3
This is a turret operating device that moves the turret. 14 is a turret speed detector, such as a pulse transmitter, which is attached to the turret operating device t13 and outputs a signal corresponding to the turret speed.

15 is a turret diameter setting device that sets a mechanically determined turret diameter; 16 is an output signal of the turret speed detector 14, a setting value of the turret diameter setting device 15, and a winding shaft winding diameter detection circuit 7; Dancer roll compensation receives the signal, calculates the loop length that fluctuates when the winding shaft 3 moves during the turret, that is, the amount of dancer roll position fluctuation, and outputs a signal corresponding to the amount of fluctuation as a result of the calculation. circuit, 1
7 is a dancer roll compensation circuit open/clear signal for turning on/off the dancer roll compensation circuit 16, which is an operation signal for turning on the dancer roll compensation circuit 16 at the start of the turret and disconnecting it at the end of the turret.

18 receives the output signal of the dancer roll compensation circuit 16;
This is an addition circuit that adds to the set value of the dancer roll position reference setting device 11.

The calculation of the amount of loop length variation at the time of the turret by the dancer roll compensation circuit 16 is based on equation (1).

Loop length variation amount Vt (m/m) = nX (2rt+D
) X π(1) where n is the turret speed, rt is the turret diameter, and D is the winding diameter.

With the above configuration, it is possible to perform dancer roll control in a birch in which the position of the dancer roll 8 that is caused by the change in loop length due to the movement of the turret winding shaft 3 does not reach the upper limit.

Due to these operations, even if the loop length changes due to the movement of the winding shaft 3, the dancer roll 8 is not pulled up to the upper limit, and the winding that occurs because the dancer roll 8 reaches the upper limit is prevented. It is possible to prevent the machine 3 from stopping, and it is possible to eliminate a large amount of work loss that would otherwise occur due to a conventional stoppage.

The present invention is not limited to turret movement, but can be easily applied to any winding machine in which the winding shaft mechanically moves for rewinding and has a front stage dancer roll, and similar effects can be obtained. It is possible.

[Effects of the Invention] According to the present invention, by introducing a dancer roll compensation circuit at the turret of the winding machine, dancer roll control can be performed without the dancer roll reaching its upper limit, and the winding machine can be A large amount of work loss due to stoppage can be eliminated.

[Brief explanation of drawings]

FIG. 1 shows the configuration of a dancer roll control device showing one embodiment of the present invention. 4-take-up shaft drive device, 5--take-up shaft control device, 6-speed setting device, 7--take-up shaft winding diameter detection circuit, 9-dancer roll position detector, 10-dancer roll control circuit, 11-dancer roll position reference setter, 12-amplifier;
I3--Turret actuator, 14--Turret speed detector, 15-Turret diameter setter, 16-Dancer roll compensation circuit.

Claims (1)

[Claims] A winding machine equipped with a dancer roll at the front stage and moving a winding shaft by using a turret for rewinding; a turret speed detector that detects the turret speed of this winding machine and outputs a signal corresponding to the speed; A turret diameter setting device that sets a mechanically determined turret diameter, a winding diameter detection circuit that generates a signal corresponding to the winding diameter, and an output signal of the turret speed detector and setting of the turret diameter setting device. A dancer roll compensation circuit that calculates the amount of dancer roll position variation based on the value and the winding diameter signal of the winding diameter detection circuit and outputs a dancer roll position signal, and adds the output signal of this dancer roll compensation circuit to the dancer roll control circuit. A dancer roll control device comprising: an adder circuit for controlling a dancer roll; and an on/off signal circuit for turning on/off a dancer roll compensation circuit at the time of a turret.