JPH1120995A - Contact pressure controller for sheet winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact pressure controller for a sheet winding device, which is capable of easily and accurately correct the output of an actuator following touch-roller replacing within a short time. SOLUTION: A contact pressure controller for a sheet winding device comprises a tilt angle detecting means 5 for detecting the tilt angle 6 of a support arm 2 for supporting a touch-roller 1 each time, a tilting time counting device 15 for receiving the detecting signal of the tilt angle detecting means 5 and counting a time T necessary for tilting the support arm 2 by a specified angle, a required contact pressure setting means 6 for setting a required contact pressure Fr between the touch-roller 1 and a winding roll R and a control means 13 for controlling an actuator 3 based on the detected value θby the tilt angle detecting means 5, the counted value T by the tilting time counting device 15 and the set value by the required contact pressure setting means 6 such that a contact pressure between the touch-roller 1 and the winding roll R is equal to the set required contact pressure Fr.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact pressure control device for a sheet winding device provided with a touch roller which comes into contact with the outer periphery of a winding roll during winding of the sheet. The present invention relates to a contact pressure control device of a sheet winding device for winding a sheet.

[0002]

2. Description of the Related Art Conventionally, in a sheet winding apparatus as described above, a touch roller 1 is supported by a support arm 2 which can swing about a fulcrum O as shown in FIG. In order to adjust the contact pressure with the take-up roll R, the air cylinder 3
In some cases, the support arm 2 can be given a rotating green around the fulcrum O by pushing and pulling the support arm 2 through the bracket 4.

The supporting arm 2 of this sheet winding device has a swing fulcrum O due to gravity acting on the supporting arm 2 and the touch roller 1.
Is generated, and when no rotational force is applied to the support arm 2 by the air cylinder 3, the touch roller 1 is pressed against the winding roll R by a pressing force corresponding to the rotational moment due to the gravity.

In the above-described sheet winding device, the pressing force of the touch roller 1 applied per unit width of the winding roll R is defined as the contact pressure between the touch roller 1 and the winding roll R, and the air cylinder 3 applies the pressing force to the support arm 2. Assuming that the contact pressure when the rotational force is not applied is the non-adjustment contact pressure, the non-adjustment contact pressure changes in a constant pattern as shown by a curve Fw illustrated in FIG. However, in general, such a change does not make it possible to obtain a high-quality winding roll.
The output of the air cylinder 3 shown in FIG. 7 is controlled by a contact pressure control device equipped with a small computer so that the required contact pressure can be obtained. Since the required contact pressure often changes with an increase in the winding amount during the winding of the sheet, it is usually necessary to grasp a change pattern with respect to the winding amount of the sheet. Since the inclination angle θ of the support arm 2 is approximately proportional to the radius of the winding roll R, that is, the winding diameter, the detection signal of the inclination angle θ is used as the detection signal of the winding diameter, and the winding diameter is used as the sheet winding. Adopt as quantity.

In FIG. 7, when the bracket 4 is pushed downward by the air cylinder 3, a clockwise rotational moment is generated on the support arm 2, and the rotational moment causes the take-up roll R to be applied to the touch roller 1 in the direction perpendicular to the support arm. A separation force is generated. In FIG. 8, assuming that the magnitude of the component of the separating force in the contact pressure direction is Fc, by controlling the output of the air cylinder so that Fc is the same as the unadjusted contact pressure Fw,
If Fc and Fw are balanced, the contact pressure between the take-up roll and the touch roller becomes zero. That is, a contact pressure F equal to a value obtained by subtracting Fc from the unadjusted contact pressure Fw is generated between the take-up roll and the touch roller. If Fc is larger than Fw, the support arm rises. Therefore, in order to obtain the required contact pressure Fr, the component Fc of the separation force of the air cylinder in the contact pressure direction is (Fw−
Fr). The relationship of Fp = k · Fc holds between the thrusts Fp and Fc of the air cylinder piston,
Assuming that the air pressure supplied to the air cylinder is p and the effective area of the piston of the air cylinder is A, a relationship of p = Fp / A holds. k changes slightly according to the inclination angle θ
This is the coefficient of Fc. Note that a specific relational expression between Fr, Fw, Fc, k, and θ can be dynamically derived by a designer, and a description thereof will be omitted.

Further, the unadjusted contact pressure Fw changes as shown in FIG. 9 according to the weight of the touch roller 1. In FIG.
Fw1, Fw2, and Fw3 are weights W1, W2, and W3, respectively (W1>W2>
It shows the non-adjusted contact pressure when using the touch roller of W3). Therefore, when the touch roller is replaced, the output of the air cylinder must be corrected according to its weight.

As shown in FIG. 7, the contact pressure control device of the conventional sheet winding device includes a tilt angle detecting means 5 for detecting the tilt angle θ of the support arm 2 every moment, and a winding diameter (tilt angle θ). Required contact pressure setting means 6 for setting a change pattern of the required contact pressure Fr with respect to the weight, weight setting means 7 for setting the weight W of the touch roller, and a set value in the required contact pressure setting means 6 and detection by the inclination angle detecting means 5 There is provided a control unit 8 that controls the air pressure p output to the air cylinder 3 so that the required contact pressure Fr that is set can be obtained based on the value θ and the set value W in the weight setting unit 7.

[0008] The control means 8 includes: an output operation unit 9; an amplification unit 10 for amplifying an electric signal output from the output operation unit 9;
And an electropneumatic converter 11. In accordance with the inclination angle θ from the inclination angle detection means 5, the output calculation unit 9 obtains the required contact pressure change pattern Fr shown in FIG. 8 based on the touch roller weight W set in the weight setting means 7. The adjusted contact pressure Fw is calculated every moment, and the required contact pressure Fr is calculated every moment according to the inclination angle θ based on the set value in the required contact pressure setting means 6, and the contact force direction component Fc of the separation force by the air cylinder 3 is calculated. Is calculated so that is equal to (Fw-Fr). The signal of the air pressure p calculated by the output calculation unit 8 in FIG. 7 is amplified by the amplification unit 10 and input to the electropneumatic converter 11. The electropneumatic converter 11 converts the air pressure of the pneumatic source into an amplifier 10
The output is adjusted to the size corresponding to the signal from the air cylinder 3 and output to the air cylinder 3.

In the above-described contact pressure control device, in order to correct the output of the air cylinder when the weight changes due to the replacement of the touch roller, the weight of each touch roller is measured and recorded in advance, and the touch roller is measured. When the operator replaces the touch roller 1, the operator grasps the weight corresponding to the touch roller 1 based on the record and inputs the weight to the weight setting unit 7.

[0010]

However, in the contact pressure control device of the sheet winding device as described above, the touch roller 1
When replacing the sheet, the work of inputting the weight of the touch roller 1 to the weight setting means 7 is troublesome, and the operation rate of the sheet winding device is reduced. In addition, there is a possibility that an erroneous setting may be performed when the operator misreads the record or makes an operation mistake. If incorrect settings are made, winding failure will occur. If it is necessary to replace the supporting arm 2 with the replacement of the touch roller, it is necessary to accurately grasp the weight of the swinging arm 2 and the position of the center of gravity, which makes the setting work more troublesome and results in a setting error. Is more likely to occur. In particular, when the sheet winding device is of a type in which a belt-like sheet is divided into a plurality of strips by a slitter and wound, the setting operation to the weight setting means 7 has a great effect on the operation rate. The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a contact pressure control device for a sheet winding device that can easily and accurately correct output of an actuator accompanying replacement of a touch roller in a short time. And

[0011]

According to the present invention, there is provided a tilt angle detecting means for detecting a tilt angle of a support arm for supporting a touch roller from time to time, and a value detected by the tilt angle detecting means.
A tilt time measuring circuit for measuring a time required for the support arm to tilt at a predetermined angle, a required contact pressure setting means for setting a required contact pressure between the touch roller and the take-up roll, and the tilt angle detecting means Based on the detected value, the measured value by the tilting time measuring circuit, and the set value in the required contact pressure setting means, the actuator so that the contact pressure between the touch roller and the take-up roll becomes the set required contact pressure. And control means for controlling.

When the support arm is tilted by replacing the touch roller on the support arm, if the output of the actuator is the same each time, the time required for the support arm to tilt at a predetermined angle and the time required for tilting the touch roller are determined. A relationship as illustrated in FIG. 10 is established between the weight and the weight. FIG. 11 shows an example of the characteristic of the non-adjusted contact pressure with respect to the tilt angle of the support arm, using the time required for the support arm to tilt at a predetermined angle as a parameter. In FIG. 11, Fw1, Fw2, Fw3
Indicates the non-adjusted contact pressure with the tilting times T1, T2, and T3 as parameters, respectively, and T1, T2, and T3 are the tilting times when the weight of the touch roller in FIG. 10 is W1, W2, and W3, respectively. Therefore, if the time required for the support arm to tilt at a predetermined angle is used as a parameter, the non-adjusted contact pressure can be calculated based on the parameter. Therefore, in the present invention, after replacing the touch roller, the tilting time measuring circuit measures the time required for the supporting arm to tilt at a predetermined angle, that is, the tilting time as a parameter. While the sheet is being wound, the tilt angle as an independent variable is detected by the tilt angle detecting means, and the control means adjusts the contact angle based on the value measured by the tilting time measuring circuit in accordance with the detection value by the tilt angle detecting means. At the same time as calculating the pressure, the output of the actuator is controlled based on the non-adjusted contact pressure and the required contact pressure that has been set.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. R
A touch roller 1 that contacts the outer periphery of the support arm 1, a support arm 2 that supports the touch roller 1 and that can swing about a fulcrum O, and an actuator 3 that applies a rotational force to the support arm 2 around the fulcrum O. Touch roller 1 on support arm 2 if necessary
A contact pressure control device for a sheet winding device capable of changing the inclination angle θ of the support arm 2 from moment to moment. A tilting time measuring circuit 15 for measuring a time T required for the arm 2 to tilt by a predetermined angle, a required contact pressure setting means 6 for setting a required contact pressure Fr between the touch roller 1 and the take-up roll R; The contact pressure between the touch roller 1 and the take-up roll R is set based on the detected value θ by the angle detecting means 5, the measured value T by the tilting time measuring circuit 15, and the set value by the required contact pressure setting means 6. And control means 13 for controlling the actuator 3 so as to obtain the contact pressure Fr.

When the detected value of the tilt angle of the support arm is not used as the detected value of the winding diameter, as shown in FIG. 5, the tilt angle detecting means 5 for detecting the tilt angle θ of the support arm 2 is used. A tilt time measuring circuit 15 for receiving a detection signal from the tilt angle detecting means 5 and measuring a time T required for the support arm 2 to tilt by a predetermined angle, and a winding amount for detecting the sheet winding amount r every moment. A detecting means 41, a required contact pressure setting means 6 for setting a required contact pressure Fr between the touch roller 1 and the winding roll R, a detected value r by the winding amount detecting means, a measured value T by the tilting time measuring circuit 15, And the contact pressure between the touch roller 1 and the take-up roll R based on the set value in the required contact pressure setting means 6,
Control means 13 for controlling the actuator 3 so that the required contact pressure Fr is set can be provided. Further, in the contact pressure control device of the sheet winding device shown in FIG. 5, the control unit 16 controls the detection value by the inclination angle detection unit 5, the detection value by the winding amount detection unit 41, the measurement value by the tilt time measurement circuit 15, Further, control means for controlling the actuator 3 so that the contact pressure between the touch roller and the take-up roll becomes the set required contact pressure Fr based on the set value in the required contact pressure setting means 6 can be used.

Further, in the contact pressure control device of the sheet winding device according to the present invention, which is convenient when the tilting range of the support arm is narrow,
As shown in FIG. 6, a tilt detecting means 5 'for detecting the tilt of the support arm 2 from a predetermined position, and an operation amount command signal P0 to the actuator 3 when the sheet winding is stopped are gradually transmitted in the direction in which the touch roller rises. An operation amount command means 17 for increasing the amount of operation, a balance operation amount detection circuit 45 for storing an operation amount command value P from the operation amount instruction means 17 when a detection signal is received by the tilt detection means 5 ', A winding amount detecting unit 41 for detecting the winding amount momentarily, a required contact pressure setting unit 6 for setting a required contact pressure between the touch roller 1 and the winding roll R, and a detection value r of the winding amount detecting unit 41. , The contact pressure between the touch roller 1 and the take-up roll R is set based on the detection value p detected by the balance operation amount detection circuit and the set value in the required contact pressure setting means 6.
And control means 16 for controlling the actuator 3 so that

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a touch roller, 2
Is a support arm, 3 is an air cylinder as an actuator,
4 is a bracket, 5 is an inclination angle detecting means, 6 is a required contact pressure setting means, 10 is an amplifying section, 11 is an electropneumatic converter, and 12 is a pressure regulating valve, which are denoted by the same reference numerals in FIG. It is configured and performs the same function as the element. 13 is a control means, 14 is an opening / closing circuit, 15 is a tilting time measuring circuit, 16 is an output calculation unit, and 17 is a tilting time measuring circuit 15 for tilting the supporting arm 2 when measuring the tilting time of the supporting arm 2. Air pressure command means for commanding the air pressure of
Reference numerals 8 and 19 denote switching circuits, respectively. Switching circuit 14, 1
8 and 19 are linked by operating one operation switch (not shown). When the open / close circuits 14 and 18 are opened, the open / close circuit 19 is closed. When the open / close circuits 14 and 18 are closed, the open / close circuit 19 is closed. It is open.

The tilting time measuring circuit 15 inputs a detected value θ of the tilt angle by the tilt angle detecting means 5 when the open / close circuit 14 is closed, and a counter circuit when the detected value of the tilt angle becomes a constant value. (Not shown), the counting of time is started, and the counting is stopped when the tilt advances and the tilt angle θ becomes another constant value, so that the support arm 2 tilts at a predetermined angle. The required tilt time T can be measured and stored.

The output calculation unit 16 is provided with a relational expression for calculating the air pressure supplied to the air cylinder 3 based on the unadjusted contact pressure and the required contact pressure, with the inclination angle θ as an independent variable. The arithmetic expression of the non-adjusted contact pressure uses the tilt time T of the support arm 2 as a parameter.

FIG. 2 is a schematic side view of the sheet winding device, and FIG. 3 is a schematic plan view of a winding position of the sheet winding device shown in FIG. In this embodiment, the sheet winding device is provided with a slitter, and a wide winding sheet S0 such as a plastic film, paper, or a nonwoven fabric is divided into a plurality of strips by a slitter K, and the divided sheets S are arranged vertically. A winding roll R is formed by alternately sorting and winding onto a winding core C on the WS. During the winding of the sheet, each winding core C is driven centrally, and the contact pressure between the touch roller 1 at the upper winding position and the touch roller 1 at the lower winding position is in contact with the winding roll R.
Controlled by separate contact pressure controllers.

The touch roller 1 is provided for each divided sheet S, and both ends thereof are held by a pair of support arms 2, respectively. The support arm 2 is mounted on the support beam 21 so as to be slidable in the longitudinal direction of the support beam, and can be fixed at a required position. The support beam 21 is rotatably supported at both ends by a machine frame 22. The air cylinder 3 is provided so as to be able to push and pull the bracket 4 fixed to one end of the support beam 21, and can apply a rotational force to the support arm 2. In the case of this embodiment, the support arm 2 can bring each touch roller 1 into contact with the outer periphery of each winding roll R even if a slight difference in winding diameter occurs between the winding rolls R on the winding shaft WS. Thus, the arm member 23 made of a leaf spring is provided. The arm member 23 is attached to and detached from the support beam 21 together with the touch roller 1. Support arm 2
Is provided such that a highly rigid arm member is swingably mounted on a base provided on the support beam 21 so as to be positionable, a spring is provided between the base and the arm member, and the arm member is resilient to the base. It may be configured to be able to swing freely.

A gear 24 is provided at the other end of the support beam 21.
The gear 24 is a gear 2 attached to an input shaft of a rotary encoder 25 attached to the machine frame 22.
6 so that the rotation of the support beam 21 can be transmitted to the rotary encoder 25. The tilt angle detecting means 5 shown in FIG. 1 receives the pulse signal from the rotary encoder 25 shown in FIG. 3, and counts the pulse signal by a counting circuit to detect the tilt angle θ of the support arm 2.

In the sheet winding device of this embodiment, when the number of divided sheets and the divided width are changed, the support beams 2 are correspondingly changed.
The number of touch rollers 1 to be mounted on the
Length changes. And the width of the touch roller 1 is various,
It is not necessarily proportional to the width of the split sheet. In order to control the contact pressure by the contact pressure control device of this embodiment, after replacing the touch roller 1 with a necessary one, first switch to an air pressure circuit (not shown) and supply compressed air to the air cylinder 3 to support it. Raise arm 2.

Next, the opening and closing circuits 14 and 18 shown in FIG. 1 are closed and the opening and closing circuit 19 is opened, and the air pressure commanded by the air pressure command means 17 is supplied from the electropneumatic converter 11 to the air cylinder 3 so that the supporting arm 2 is tilted toward the core C. Then, while the support arm 2 falls, the inclination angle detecting means 5 sets the inclination angle θ.
And the tilt time measuring circuit 15 measures the tilt time T of the support arm 2.

Next, when winding is started with the switching circuits 14 and 18 open and 19 closed, the output calculation unit 16
Based on the value set by the required contact pressure setting means 6, the required contact pressure Fr is calculated every moment according to the detected value θ by the inclination angle detecting means 5, and the measured value T by the tilt time measuring circuit 15 is calculated.
The non-adjusted contact pressure Fw is calculated every moment in accordance with the detection value θ of the inclination angle detecting means 5 based on the detected angle θ. The air pressure p for obtaining the required contact pressure Fr is calculated every moment and output to the amplifier 10, and the air pressure is output from the electropneumatic converter 11 to the air cylinder 3. In the case of this embodiment, the air cylinder 3
, Compressed air is supplied to both sides of the piston from the electropneumatic converter 11 and the pressure adjusting valve 12, so that the output of the air cylinder 3 is determined by the thrust of the piston by the air pressure from the electropneumatic converter 11 and the pressure adjusting valve. It is equal to the difference from the thrust of the piston by the air pressure from 13. Therefore, the output calculation unit 9 calculates an air pressure obtained by adding the air pressure from the pressure regulating valve 12 to the air pressure based on the output of the air cylinder 3.

FIG. 4 shows a second embodiment of the contact pressure control device of the sheet winding device. During the winding of the sheet, the output calculation section 16 of the control means 13 determines the contact pressure on the basis of the set value of the required contact pressure setting means 6. The air pressure p1 corresponding to the required contact pressure Fr is calculated every moment according to the detected value θ of the tilt angle detecting means 5, and the signal of the air pressure is output to the amplifier 32 via the opening / closing circuit 31, and the tilt time is measured. Based on the measurement value T of the circuit 15, the air pressure p2 for balancing the non-adjusted contact pressure is calculated every moment according to the detection value θ of the inclination angle detection means 5, and the signal is sent to the amplification unit 34 via the opening / closing circuit 33. Output. The electropneumatic converter 35 receives the signal from the amplifier 32 and outputs the air pressure p1 to the piston rod side of the air cylinder 3 as an actuator. The electropneumatic converter 36 receives the signal from the amplifier 34 and Outputs p2 to the cylinder head side. Then, the air cylinder 3 produces a thrust equal to the difference between the thrust by the air pressure p1 and the thrust by the air pressure p2. When the tilting time of the support arm 2 is measured by the tilting time measuring circuit 15, the open / close circuits 14 and 18 are used.
Is closed, and the open / close circuits 31 and 33 are opened, and a predetermined air pressure command signal is output from the air pressure
Defeat

FIG. 5 shows a third embodiment of the contact pressure control device of the sheet winding device. The contact pressure control device includes a winding amount detecting unit 41 that detects a winding diameter r. The winding amount detecting means 41 is a speed generator 4 for detecting the rotation speed n of the winding core C.
2. The speed generator 43 for detecting the traveling speed v of the seat, the rotation speed n from the speed generators 42 and 43, and the winding diameter r equal to v / (2πn) are calculated every moment based on the detected value of the seat traveling speed v. I do. The required contact pressure setting means 6 sets a change pattern of the required contact pressure Fr with respect to the winding diameter r. The output calculating section 16 of the control means 13 is provided with a formula for calculating an unadjusted contact pressure using the tilt time T as a parameter and the winding diameter r as an independent variable. During the winding of the sheet, the output calculation unit 16 determines the set value in the required contact pressure setting unit 6 and the tilt time measurement circuit 15 in accordance with the winding diameter detection value r detected by the winding amount detection unit 41.
The air pressure p for obtaining the set required contact pressure Fr is calculated every moment on the basis of the measurement value T obtained by the formula (1), and the signal is output to the amplifier 10.

According to the present invention, in the contact pressure control device of the sheet winding device shown in FIG. 5, the control means 16 includes a detection value by the inclination angle detection means 5, a detection value by the winding amount detection means 41, and a tilting time. Instead of the control means for controlling the actuator 3 so that the contact pressure between the touch roller and the take-up roll becomes the set required contact pressure Fr based on the value measured by the measurement circuit 15 and the value set by the required contact pressure setting means 6. Can be. In that case, the control means includes the tilt angle detection means 5
And the measured value T by the tilting time measuring circuit 15
The unadjusted contact pressure is calculated every moment based on
The required contact pressure Fr is calculated every moment on the basis of the detection value r obtained by 1 and the set value in the required contact pressure setting means 6. The tilt angle detecting means 5 may be composed of two sensors such as an optical switch and a proximity switch. Then, in this case, the two sensors are arranged at a fixed tilt angle of the support arm 2 and detect the support arm 2 or a detecting piece that swings together with the support arm 2 at different tilt angles. In the present invention, for example, instead of employing the winding diameter as the sheet winding amount, a winding length may be employed. In that case, a known winding length detector is provided as a winding amount detecting means. When the inclination angle of the support arm is used as the sheet winding amount, the apparatus becomes the same as in the first embodiment, and the inclination angle detecting means can be used also as the sheet winding amount detecting means. Become.

FIG. 6 shows a fourth embodiment of the present invention. FIG.
The sheet take-up device shown in FIG. 1 contacts the touch roller 1 with the outer periphery of the take-up roll on the core C and maintains the touch roller 1 at a substantially constant position in accordance with an increase in the take-up diameter. The sheet is wound up while the core C is separated from the touch roller 1. Therefore, the tilt range of the support arm 2 is narrow,
The unadjusted contact pressure is substantially constant from the start of winding to the end of winding. The actuator 3 is an air cylinder, and the operation amount output from the control device 13 is an air pressure. The operation amount command means 17 can generate the command value p0 of the air pressure in a certain range so as to increase by a predetermined increment every certain time. The balance operation amount detection circuit 45 includes the air cylinder 3
Of the support arm 2 due to the non-adjustable contact pressure
This is for detecting the air pressure supplied to the air cylinder 3 when the rotation force of the air cylinder 3 is balanced, that is, the balance air pressure P, and the command value p0 of the air pressure from the operation amount command means 17 is input every moment. At the same time, a detection signal from the tilt detection means 5 'can be input, and the command value of the air pressure when receiving the detection signal from the tilt detection means 5' can be stored as the balance air pressure P. The tilt detecting means 5 'comprises a detector such as a photoelectric switch or a proximity switch, or a rotary detector such as a rotary encoder. Switching circuit 18, 19, 4
Reference numeral 6 is for switching between an air pressure command signal from the output calculation unit 16 and an air pressure command signal from the manipulated variable command means 17. 19 opens. Normally, the open / close circuit 19 is closed so that the air pressure command signal from the output calculation unit 16 is used.

The output calculation section 16 of the control means 13 incorporates a formula for calculating the non-adjusted contact pressure based on the detected value P of the balance air pressure by the balance operation amount detection circuit 45. In this embodiment, since the touch roller 1 is maintained at a substantially constant position, the unadjusted contact pressure is calculated by multiplying the detected value P of the balance air pressure by a proportional constant. During sheet winding, the output calculation unit 16 calculates the required contact pressure Fr every moment according to the detection value r from the winding amount detection unit 41 based on the set value set in the required contact pressure setting unit 6. The non-adjustment contact pressure is calculated based on the detection value P by the balance operation amount detection circuit 45, and the contact pressure between the touch roller 1 and the take-up roll is set based on the non-adjustment contact pressure and the required contact pressure. The air pressure p to be supplied to the air cylinder 3 is calculated every moment so that the pressure becomes Fr.

In order to detect the balance air pressure P by the balance operation amount detection circuit 45, after the touch roller 1 is replaced,
While the sheet winding is stopped, the touch roller 1 is placed on the winding core C held at the winding start position, and in this state, an operation switch (not shown) is operated to open and close the open / close circuits 18 and 46.
Is closed and 19 is opened, and the manipulated variable command means 17 is started. Then, the air pressure command signal P0 from the manipulated variable command means 17 is transmitted to the amplifying unit 10 and the balance manipulated variable detection circuit 4.
5 is input. The air pressure command signal input to the amplifier 10 is amplified, converted to air pressure by the electropneumatic converter 11, and output to the air cylinder 3. Since the output air pressure gradually increases in accordance with the air pressure command value from the operation amount command means 17, the rotational force applied from the air cylinder 3 to the support arm 2 also gradually increases. Then, the touch roller 1 is lifted from the core C at the same time that the support arm 2 tilts against the rotational force due to gravity. At this time, the tilt detection means 5 '
Detects a slight tilt of the support arm 2 and outputs a detection signal, and the balance operation amount detection circuit 46 stores the air pressure P at that time. Instead of directly inputting the air pressure command value from the manipulated variable command means 17 to the balance manipulated variable detection circuit 45,
A pressure sensor for detecting the air pressure supplied to the air cylinder 3 is provided. You may. In the case of this embodiment, even if the tilt of the support arm 2 supporting the touch roller 1 is limited to a narrow range, the output correction of the air cylinder 3 accompanying the replacement of the touch roller can be easily and accurately performed. The sheet winding device described above can be replaced with a device that winds a sheet around a core supported at a fixed position, if necessary. In this case, in order to calculate the non-adjusted contact pressure every moment, the output calculation unit 16 is given an arithmetic expression using the balance air pressure P as a parameter and the sheet winding amount as an independent variable.

According to the present invention, the sheet winding device is not limited to the one shown in FIGS. 2 and 3, but is provided with an actuator for applying a rotational force about a fulcrum to the support arm for each touch roller, The cores may be individually supported. In addition, a hydraulic cylinder, a rotary actuator whose output shaft rotates, or the like may be used instead of the air cylinder as long as it can apply a rotational force to the support arm.

[0032]

According to the present invention, the time required for the support arm of the touch roller to tilt at a predetermined angle is measured by the tilt time measuring circuit, and the measured tilt time is input to the control means as a parameter. Alternatively, the support arm of the touch roller is supported so as not to tilt downward from a predetermined posture, and an operation amount command signal to the actuator is generated by operation amount command means so as to gradually increase the touch roller in a floating direction, and the actuator is supported by the actuator. The operation amount when the touch roller starts to float due to the rotational force applied to the arm is detected by the balance operation amount detection circuit, and the detected value is input to the control means as a parameter, so that the output of the actuator accompanying the touch roller replacement is obtained. The correction can be completed in a short time with little effort.
In addition, there is no fear of input error or measurement error, and the contact pressure is controlled based on the tilting time corresponding to the actual weight of the touch roller and the support arm or the operation amount command value balanced with the actual unadjusted contact pressure. Therefore, an accurate contact pressure can be obtained. Therefore, according to the present invention, the operation rate and the yield of the sheet winding device are improved. In addition, most of the contact pressure control device can be configured relatively easily with a small computer, and the tilt time measurement circuit or the balance operation amount detection circuit can maintain control accuracy for a long time without fear of deterioration. For this reason, maintenance is easier than in the case where a load is measured using, for example, a strain gauge.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a contact pressure control device of a sheet winding device according to a first embodiment of the present invention.

FIG. 2 is a side view showing an outline of the sheet winding device according to the first embodiment of the present invention.

FIG. 3 is a schematic plan view of a winding position of the sheet winding device shown in FIG. 2;

FIG. 4 is an explanatory diagram of a contact pressure control device of a sheet winding device according to a second embodiment of the present invention.

FIG. 5 is an explanatory diagram of a contact pressure control device of a sheet winding device according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of a contact pressure control device of a sheet winding device according to a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram of a contact pressure control device of a conventional sheet winding device.

FIG. 8 is a graph showing characteristics of a non-adjusted contact pressure and a required contact pressure with respect to a tilt angle of a support arm, with the horizontal axis corresponding to the tilt angle and the vertical axis corresponding to the contact pressure.

FIG. 9 is a graph showing the characteristics of the non-adjusted contact pressure with respect to the tilt angle of the support arm using the weight of the touch roller as a parameter, with the horizontal axis corresponding to the tilt angle and the vertical axis corresponding to the non-adjusted contact pressure.

FIG. 10 is a diagram showing characteristics of the touch roller weight with respect to the tilting time of the support arm, with the horizontal axis corresponding to the tilting time and the vertical axis corresponding to the touch roller weight.

FIG. 11 is a graph showing characteristics of the non-adjusted contact pressure with respect to the tilt angle of the support arm, with the tilt time of the support arm as a parameter, with the horizontal axis corresponding to the tilt angle and the vertical axis corresponding to the non-adjusted contact pressure. .

[Explanation of symbols]

 C core R take-up roll S sheet 1 touch roller 2 support arm 3 actuator (air cylinder) 4 bracket 5 tilt angle detecting means 5 'tilt detecting means 6 required contact pressure setting means 10 amplifying unit 11 electropneumatic converter 12 pressure adjustment Valve 13 Control means 15 Tilt time measuring circuit 16 Output calculation unit 17 Air pressure command means 41 Winding amount detecting means 45 Balance operation amount detecting circuit

Claims (4)

[Claims] 1. A touch roller that contacts an outer periphery of a take-up roll during sheet winding, a support arm that supports the touch roller and that can swing about a fulcrum, and a rotation of the support arm about a fulcrum. A contact pressure control device for a sheet take-up device, comprising: an actuator for applying a force, wherein the touch roller on the support arm can be replaced as necessary. An angle detecting means, a tilt time measuring circuit for measuring a time required for the support arm to tilt at a predetermined angle based on a value detected by the tilt angle detecting means when the sheet winding is stopped; A required contact pressure setting means for setting a required contact pressure with the roll; a value detected by the tilt angle detecting means, a value measured by the tilting time measuring circuit, and a set value in the required contact pressure setting means. Control means for controlling the actuator so that the contact pressure between the touch roller and the take-up roll becomes the set required contact pressure. 2. A touch roller that contacts an outer periphery of a take-up roll during sheet winding, a support arm that supports the touch roller and that can swing about a fulcrum, and a rotation of the support arm about a fulcrum. A contact pressure control device for a sheet winding device, comprising: an actuator for applying a force; and a touch roller on the support arm that can be replaced as needed. Means for receiving a detection signal from the tilt angle detecting means when the sheet winding is stopped, and a tilt time measuring circuit for measuring a time required for the support arm to tilt by a predetermined angle, and detecting the sheet winding amount every moment Winding amount detecting means, required contact pressure setting means for setting a required contact pressure between the touch roller and the winding roll, a detected value by the winding amount detecting means, a measured value by the tilting time measuring circuit, and Previous Control means for controlling the actuator so that the contact pressure between the touch roller and the take-up roll becomes the set required contact pressure based on a set value in the required contact pressure setting means. Device contact pressure control device. 3. The sheet winding apparatus according to claim 2, wherein a value detected by the tilt angle detecting means, a value detected by the winding amount detecting means, a value measured by the tilt time measuring circuit, And a contact pressure control of a sheet winding device, comprising: a control unit that controls the actuator so that a contact pressure between the touch roller and the take-up roll becomes the set required contact pressure based on a set value of the required contact pressure setting unit. apparatus. 4. A touch roller that contacts an outer periphery of a take-up roll during sheet winding, a support arm that supports the touch roller and that can swing about a fulcrum, and a rotation of the support arm around the fulcrum. A contact pressure control device for a sheet take-up device, comprising: an actuator for applying a force, wherein a touch roller on the support arm can be exchanged as necessary, wherein the tilt detection device detects tilting of the support arm from a predetermined posture. Tilt detection means,
An operation amount command means for generating an operation amount command signal to the actuator when the sheet winding is stopped so as to gradually increase the touch roller in a floating direction, and an operation amount command when receiving a detection signal from the tilt detection means. Means for storing a manipulated variable command value by means, a winding amount detecting means for detecting the sheet winding amount momentarily, and a required contact pressure for setting a required contact pressure between the touch roller and the winding roll. Setting means, a detection value by the winding amount detection means, a detection value by the balance operation amount detection means,
And a control means for controlling the actuator so that a contact pressure between the touch roller and the take-up roll becomes the set required contact pressure based on a set value of the required contact pressure setting means. Contact pressure control device for the taker.