JPH08299886A - Control device of blade coater - Google Patents

Abstract

PURPOSE: To eliminate paper cutting while stabilizing operation by measuring a slide speed from both the peripheral speed of a backing roll and the slide speed of paper to use the same. CONSTITUTION: A backing roll 6 is driven on the basis of the speed set value by a speed setting device and the signal from a tension correction part 9 by a backing roll driving electromotor 5. The speed of paper 30 from a non-contact speedometer 11 and the peripheral speed of the backing roll 6 from both a pulse transmitter 2 and a rotational speed operator 3 are inputted to a substrator 12 and a slide speed is led out to be displayed on a speed display device 13. An operator looks this display to adjust the speed of the backing roll 6 by the speed setting device 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade coater control device in a coated paper manufacturing process,
The present invention relates to a controller for a blade coater that prevents paper rumble and paper breakage due to changes in the binding force of the backing roll against the paper when the blade is released and under pressure.

[0002]

2. Description of the Related Art FIG. 5 is a circuit showing a conventional controller for a blade coater. In the figure, 1 is a speed setting device for the backing roll 6, 2 is a pulse transmitter, 3 is a rotation speed calculator, 4 is a rotation speed control unit, 5 is a backing roll drive motor, 7 is a blade, 8 is a tension setting device, Reference numeral 9 is a tension correction unit that outputs a speed correction signal for the backing roll 6 to control the tension of the paper, 10 is a tension detector, and 30 is paper.

Next, the operation will be described. In the steady state, the tension correction unit 9 controls so that the rotation of the backing roll 6 is accelerated when the tension of the paper 30 is lowered and the rotation of the backing roll 6 is retarded when the tension of the paper 30 is increased.

[0004]

Since the conventional apparatus is constructed as described above, when the blade 7 is released, the binding force of the backing roll 6 against the paper is reduced, and the paper sags and the backing roll 6 is released. Speed increases, and a difference between the roll speed and the paper speed occurs, causing a meandering or the like. When the blade 7 is brought into contact with the paper from the released state and pressure is applied next, the speed of the backing roll is faster than the paper speed, so the tension rapidly increases and the speed of the backing roll 6 hunts to correct the tension, causing the paper to run out. There was a problem such as occurrence.

The present invention has been made to solve the above problems, and controls a blade coater for preventing paper rumble, meandering, and paper breakage caused by slippage between a paper and a backing roll due to attachment / detachment of a blade. The purpose is to provide a device.

As a known technique related to the present invention, there is JP-A-5-25798. This publication is designed to be controlled according to the position signal of the dancer roll, and is different from the solution means of the present invention.

[0007]

[Means for Solving the Problems]

(1) A blade coater control device according to the present invention is a blade coater control device that controls the peripheral speed of a backing roll in accordance with the tension of paper, and determines the sliding speed from the peripheral speed of the backing roll and the running speed of the paper. It is provided with a slip speed detecting means for detecting.

(2) Further, in the controller of the blade coater for controlling the peripheral speed of the backing roll according to the tension of the paper, the sliding speed detecting means for detecting the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper. An alarm means is provided for outputting an alarm signal when the detected slip speed exceeds a preset upper limit value or lower limit value.

(3) Further, in the controller of the blade coater for controlling the peripheral speed of the backing roll according to the tension of the paper, the sliding speed detecting means for detecting the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper. A control means for controlling the peripheral speed of the backing roll according to the detected slip speed is provided.

(4) Further, in the controller of the blade coater for controlling the peripheral speed of the backing roll according to the tension of the paper, the sliding speed detecting means for detecting the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper. And a control means for outputting the detected slip velocity signal through a dead band device having a predetermined dead band and an output limiter for limiting a predetermined output, and controlling the peripheral speed of the backing roll according to the output. It is a thing.

(5) Further, in the controller of the blade coater for controlling the peripheral speed of the backing roll according to the tension of the paper, the sliding speed detecting means for detecting the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper. , A control for controlling the peripheral speed of the backing roll according to a comparison between the detected sliding speed immediately before pressing the blade onto the backing roll and the detected sliding speed during pressing the blade onto the backing roll. It is equipped with means.

(6) In a blade coater controller for controlling the peripheral speed of the backing roll according to the tension of the paper, a slip speed detecting means for detecting the slip speed from the peripheral speed of the backing roll and the traveling speed of the paper. The dead band device having a predetermined dead band is obtained by comparing the detected sliding speed immediately before pressing the blade onto the backing roll and the detected sliding speed during pressing the blade onto the backing roll. And a control means for outputting a predetermined output through an output limiter for limiting the predetermined output, and controlling the peripheral speed of the backing roll according to the output.

[0013]

[Action]

(1) In the blade coater control device according to the present invention, the sliding speed detecting means detects the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper.

(2) Further, the slipping speed detecting means detects the slipping speed from the peripheral speed of the backing roll and the traveling speed of the paper, and when the slipping speed detected by the warning means exceeds a preset upper limit value or lower limit value, an alarm is issued. Output a signal.

(3) The sliding speed detecting means detects the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper, and the peripheral speed of the backing roll is controlled according to the sliding speed detected by the control means.

(4) Further, the speed detecting means detects the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper, and the signal of the sliding speed detected by the control means is a dead band device having a predetermined dead zone and a predetermined output. Is output via an output limiter for limiting the backing roll, and the peripheral speed of the backing roll is controlled according to this output.

(5) Further, the slipping speed detecting means detects the slipping speed from the peripheral speed of the backing roll and the traveling speed of the paper, and the controlling means detects the slipping speed immediately before the blade is pressed against the backing roll. The peripheral speed of the backing roll is controlled according to a comparison with the detected sliding speed while the blade is being pressed against the backing roll.

(6) Further, the slipping speed detecting means detects the slipping speed from the peripheral speed of the backing roll and the traveling speed of the paper, and the controlling means detects the slipping speed immediately before the blade is pressed against the backing roll. The blade is compared with the detected sliding speed during pressing on the backing roll, and the comparison result is output through a dead band device having a predetermined dead band and an output limiter for limiting a predetermined output, and this output The peripheral speed of the backing roll is controlled accordingly.

[0019]

【Example】

Example 1. 1 is a block diagram showing a controller of a blade coater according to a first embodiment of the present invention. In the figure,
1 is a speed setting device for the backing roll 6, 2 is a pulse transmitter, 3 is a rotation speed calculator, 4 is a rotation speed control unit, 5 is a backing roll drive motor, 6 is a backing roll, and 7 is a backing roll.
Is a blade, 8 is a tension setter, 9 is a tension correction unit, 10 is a tension detector, 11 is a non-contact speedometer, 12 is a subtractor, 1
3 is a speed indicator and 30 is paper.

Next, the operation will be described. The tension set value by the tension setter 8 and the tension signal of the paper 30 obtained from the tension detector 10 are used as inputs to control the tension of the paper by the tension correction unit 9 to send a correction signal of the backing roll rotation speed, and this correction is performed. The signal and the speed setting value set by the backing roll speed setting device 1 are input to the rotation speed control unit 4 as reference signals.

On the other hand, the pulse signal transmitted from the pulse generator 2 according to the rotation speed of the backing roll drive motor 5 is input to the rotation speed control unit 4 as a feedback signal of the rotation speed obtained through the rotation speed calculator 3. The backing roll drive motor 5 is controlled by the rotation speed control unit 4 based on the input reference signal and feedback signal, and the backing roll 6 is driven.
Drive.

Next, the actual speed of the paper 30 is measured by the non-contact speed (for example, laser Doppler velocimeter) 11. The measured value and the output value of the rotation speed calculator 3 are output to the subtractor 12. The subtractor 12 performs a subtraction process (AB) of the rotational speed (backing roll peripheral speed) A input from the rotational speed calculator 3 and the paper speed B input from the non-contact speedometer 11 to perform a speed difference (slip). Speed) is derived. Polarity (±) is used so that the derived sliding speed can be used as operational guidance for operators.
It is also output to the speed indicator 13 to display the slip speed.

Since the slip speed is displayed by using the speed difference between the backing roll peripheral speed and the paper speed in this manner, the operator can know the backing roll peripheral speed and the paper speed difference. It is possible to adjust the backing roll speed setting device 1 to bring the sliding speed close to zero by using this speed difference as a guidance before pressing the next blade when releasing the blade, and stable operation is possible even after pressing the blade 7. Yes, it leads to reduction of paper scraps.

Embodiment 2 FIG. Second Embodiment FIG. 2 is a block diagram showing a blade coater control device according to a second embodiment of the present invention. As shown in the figure, the alarm upper limit excess detector 1 is added to the first embodiment.
4, alarm upper limit value setter 15, slip speed upper limit value excess alarm device 16, alarm lower limit value excess detector 17, alarm lower limit value setter 1
8. The feature is that a slip speed lower limit value excess alarm device 19 is added.

The alarm values and slip speeds set by the alarm upper limit value setter 15 and the alarm lower limit value setter 18 are input to the alarm upper limit value excess detector 14 and the alarm lower limit value excess detector 17, respectively, and the upper limit of the slip speed is set. The value excess signal or the lower limit value excess signal is output to the slip speed upper limit value excess alarm device 16 and the slip speed lower limit value excess alarm device 19, respectively.

As a result, it is possible to know that the slip speed exceeds the alarm limit value before the pressurization of the blade, especially before the blade is pressed, before the slip speed becomes excessively high and the stable operation is hindered, and the operator can check the speed of the backing roll before pressurization. By adjusting in the opposite direction to the alarm output and canceling the alarm output (= sliding speed within the specified value), stable operation can be performed even after pressurizing the backing roll. Therefore, it is possible to prevent a delay in adjusting the speed of the backing roll, which leads to a reduction in paper shortage.

Embodiment 3 FIG. Third Embodiment FIG. 3 is a block diagram showing a blade coater control device according to a third embodiment of the present invention. As shown in the figure, the first embodiment is characterized in that a sliding speed control unit 20, a dead band device 21, and an output limiter 22 are added.

Paper 3 measured by the non-contact speedometer 11
The speed S of 0 and the slip speed derived from the output of the rotation speed calculator 3 are input to a slip speed control unit 20 having a proportional circuit and an integration circuit, and a dead band device is derived by deriving a correction signal of the rotation speed of the backing roll. It outputs to 21.

The dead band device 21 outputs zero when a correction signal smaller than the dead band is input, and outputs the correction signal to the output limiter 22 when a correction signal larger than the dead band is input. The output limiter 22, when the correction signal within the limit is input,
The input correction signal is output to the rotation speed control unit 4 as it is, and when the correction signal exceeding the limit is input, the limit value is output to the rotation speed control unit 4 as a correction signal.

As a result, the backing roll 6 and the paper 30 are
Since the speed of the backing roll 6 is suppressed when the blade is released, stable operation can be performed even after the blade is pressed, and paper shortage can be reduced.

Example 4. Fourth Embodiment FIG. 4 is a block diagram showing a blade coater control device according to a fourth embodiment of the present invention. As shown in the figure, the first embodiment is characterized in that a sliding speed control unit 20, a dead band device 21, an output limiter 22, a data storage circuit 23, a blade release signal 24, and gate circuits 25 to 28 are added.

The sliding speed output from the subtracter 12 is output to the data storage circuit 23 through the gate 25 while the blade release signal 24 is off (while the blade 7 is being pressed by the backing roll 6). Next, blade release signal 2
While 4 is on (while the blade 7 is released), the sliding speed immediately before pressurizing the blade to the backing roll from the data storage circuit 23 is proportional through the gate 26 and the current sliding speed is proportional through the gate 27. Input to a slip speed control unit 20 having a built-in circuit and an integration circuit to derive a correction signal for the rotation speed of the backing roll to generate a dead band device 2
Output to 1.

The dead band device 21 outputs zero when a correction signal smaller than the dead band is input, and outputs the correction signal to the limiter 22 when a correction signal larger than the dead band is input. The output limiter 22 outputs the correction signal as it is to the gate 28 when the correction signal within the limit is input, and outputs the limit value to the gate 28 as the correction signal when the correction signal exceeding the limit is input. However, this output is output to the rotation speed control unit 4 through the gate 28 while the blade release signal 24 is on.

As a result, the backing roll 4 and the paper 30 are
The sliding speed of the data is stored in the data storage circuit 23 before the blade is pressed.
Since the control is performed so as to approach the sliding speed immediately before the release of the blade, which is stored in, the stable operation can be performed even after the blade is pressed, which leads to the reduction of paper shortage.

Example 5. The embodiments described above may be combined and implemented. For example, the third embodiment and the second embodiment may be combined to control the slip speed to zero, and an alarm may be issued if the upper and lower limit values are exceeded. Moreover, you may make it perform an emergency operation according to this alarm signal. Moreover, you may combine Example 4 and Example 2.

[0036]

【The invention's effect】

(1) As described above, according to the present invention, the slip speed is detected from the peripheral speed of the backing roll and the speed of the paper. Therefore, the speed of the backing roll before pressing the blade can be easily adjusted, and the blade pressing speed can be easily adjusted. Stable operation is possible even after pressure, and it has the effect of eliminating paper shortage.

(2) Further, since the alarm is issued before the slipping speed becomes excessive to notify the necessity of speed adjustment of the backing roll, it is possible to prevent the backing roll speed adjustment delay and eventually to eliminate the paper shortage. .

(3) Further, since the difference between the peripheral speed of the backing roll and the speed of the paper is eliminated, the increase of the backing roll speed can be suppressed, the stable operation can be performed even after pressing the blade, and the effect of eliminating the paper shortage can be eliminated. There is.

(4) Further, since the sliding speed during pressing the blade against the backing roll is controlled to approach the sliding speed during pressing the blade against the backing roll, stable operation can be performed even after pressing the blade. , Has the effect of eliminating paper scraps.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a controller of a blade coater according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a controller of a blade coater according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a controller of a blade coater according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a controller of a blade coater according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram showing a conventional blade coater control device.

[Explanation of symbols]

1 backing roll speed setter, 2 pulse transmitter,
3 rotation speed calculator, 4 rotation speed control unit, 5 backing roll drive motor, 6 backing roll, 7 blade, 8 tension setting device, 9 tension correction unit, 10 tension detector, 11 non-contact speed meter, 12 subtractor , 13
Speed indicator, 14 Alarm upper limit exceeded detector, 15 Alarm upper limit setter, 16 Sliding speed upper limit exceeded alarm, 17
Alarm lower limit exceeded detector, 18 Alarm lower limit setter, 1
9 Sliding speed lower limit exceeded alarm, 20 Sliding speed control unit, 21 Dead band device, 22 Output limiter, 23 Data storage circuit, 24 Blade release signal, 25-28 Gate, 30 Paper.

Claims (6)

[Claims] 1. A blade coater control device for controlling the peripheral speed of a backing roll according to the tension of paper, comprising a slip speed detecting means for detecting the slip speed from the peripheral speed of the backing roll and the running speed of the paper. A blade coater control device characterized by the above. 2. A blade coater control device for controlling the peripheral speed of a backing roll according to the tension of the paper, a slip speed detecting means for detecting the slip speed from the peripheral speed of the backing roll and the running speed of the paper, and the detection. A controller for a blade coater, comprising alarm means for outputting an alarm signal when the sliding speed exceeds a preset upper limit value or a lower limit value. 3. A blade coater control device for controlling the peripheral speed of a backing roll according to the tension of the paper, a slip speed detecting means for detecting the slip speed from the peripheral speed of the backing roll and the running speed of the paper, and the detection. A controller for a blade coater, comprising control means for controlling the peripheral speed of the backing roll according to the sliding speed. 4. A blade coater control device for controlling the peripheral speed of a backing roll according to the tension of the paper, a slip speed detecting means for detecting the slip speed from the peripheral speed of the backing roll and the running speed of the paper, and the detection. The slip speed signal is output via a dead band device having a predetermined dead band and an output limiter for limiting a predetermined output, and a control means for controlling the peripheral speed of the backing roll according to the output is provided. Characteristic blade coater control device. 5. A blade coater control device for controlling the peripheral speed of a backing roll according to the tension of the paper, comprising a sliding speed detecting means for detecting the sliding speed from the peripheral speed of the backing roll and the running speed of the paper, and a blade. The detected sliding speed immediately before pressurizing the backing roll, and a control means for controlling the peripheral speed of the backing roll according to the comparison of the detected sliding speed during pressing the blade to the backing roll. A blade coater control device characterized by the above. 6. A blade coater control device for controlling the peripheral speed of a backing roll according to the tension of the paper, the sliding speed detecting means for detecting the sliding speed from the peripheral speed of the backing roll and the traveling speed of the paper, and a blade. The slip velocity detected immediately before pressurizing the backing roll and the slip velocity detected while pressing the blade onto the backing roll are compared, and the comparison result is a dead band device having a predetermined dead zone and a predetermined dead band. A controller for a blade coater, comprising: a control unit that outputs an output through an output limiter that limits the output, and controls the peripheral speed of the backing roll according to the output.