JP3024859B2 - Web material feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web material feeding device for unwinding and feeding web material from a raw material.

[0002]

2. Description of the Related Art For example, in a slitter for slitting a web material such as paper or a plastic film, in a web drive system, the web material is driven by a drive motor to rotate, and the web material is rotated. It is unwound from the raw material, sent to the slit position, and slit into a plurality of strips. Then, the slit material is sent to a winding position, and each is wound. Further, in the web material feeding path, a tension applying mechanism acts on the web material to apply tension to the web material. Currently, a dancer roller type tension applying mechanism is generally used,
In the web material feed path, dancer rollers are supported by the arms and engage the web material. The dancer roller and the arm can swing about a fulcrum of the arm. Further, an air cylinder is connected to the arm, and air is supplied to the air cylinder, which acts on the arm, the dancer roller, and the web material to apply tension to the web material. Therefore, the web material can be accurately slit and wound up.

[0003] With regard to the web material, the material usually has a considerable amount of eccentricity. Often, a material having a large eccentricity is used as a raw material. For this reason, when the web material is unwound from the web and fed, the eccentricity of the web is related to the unwind amount of the web material, and when the web is rotated at a constant angular velocity in one rotation cycle of the web. ,
The unwinding amount of the web material changes depending on the eccentric amount of the raw material.
This causes a problem that the dancer roller and the arm swing, and the tension of the web material fluctuates. In order to solve this problem, the position of the dancer roller has been detected by the position detector, and in one rotation cycle of the material,
Based on the position detection signal of the detector, the angular velocity of the raw material is feedback-controlled by the control device and changed to keep the unwinding amount of the web material constant regardless of the eccentric amount of the raw material.
The swing amount of the dancer roller was kept to a minimum.

However, the raw material is often heavy. Therefore, there is a problem that the inertia is large. In particular, recently, as a part of the improvement of the slitter, the work speed has been increased, and it has been required to rotate the web at a high speed and unwind the web material at a high speed. When it is rotated at a high speed, it is technically difficult to accurately feedback control the angular speed. Therefore, it is inevitable that the unwinding amount of the web material changes due to the eccentric amount of the raw material, and the tension of the web material fluctuates.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method of rotating a web material by a driving motor, unwinding and feeding the web material from the web, and using a dancer roller type or other type of tension applying mechanism in the feed path. In a web material feeder that acts on the web material and applies tension to the web material, when the raw material has a large amount of eccentricity and has a large inertia, it is rotated at a high speed to unwind the web material at a high speed. However, the purpose is to prevent the tension of the web material from fluctuating.

[0006]

According to the present invention, the raw material of the web material is rotated by the drive motor, the web material is unwound from the raw material and fed, and in the feeding path, the tension applying mechanism acts on the web material. A driving mechanism coupled to a frame supporting the tension applying mechanism, for moving the frame and the tension applying mechanism in a direction in which the tension applying mechanism acts on the web material and in a direction opposite thereto, and Connected to a winding diameter detector for detecting the winding diameter of the web material and the driving mechanism, and reads the eccentricity of the raw material based on the winding diameter detection signal of the detector, and detects the eccentricity of the web material according to the eccentricity of the raw material. The change pattern of the unwinding amount is predicted and calculated, and the drive mechanism is program-controlled based on the change pattern to move the frame and the tension applying mechanism. Web material feeding apparatus characterized by comprising a control device for is provided. Further, according to the present invention, the raw material of the web material is rotated by the drive motor, and the web material is unwound from the raw material, fed,
In the feed path, in a device in which a moving roller is engaged with the web material, the moving roller is connected to a frame that supports the moving roller, and the frame and the moving roller are connected in a direction in which the moving roller is engaged with the web material. A drive mechanism for moving in the opposite direction, connected to a winding diameter detector for detecting the winding diameter of the raw fabric and the driving mechanism,
On the basis of the winding diameter detection signal of the detector, the eccentricity of the raw material is read, and a change pattern of the unwinding amount of the web material according to the eccentricity of the raw material is calculated and calculated, based on the change pattern, Program-controlled drive mechanism
A web material feeding device is provided, comprising a control device for moving the frame and the moving roller.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

In FIG. 1, this is a slitter which slits and winds a web material 1 such as paper or plastic film, and a raw material 3 of the web material 1 is driven by a driving motor 2 to rotate. It is unwound from the web 3 and sent. Then, in the feed path, a tension applying mechanism acts on the web material 1 to apply a tension to the web material 1. The tension applying mechanism is a dancer roller type. The dancer roller 4 is supported by the arm 5, the web material 1 is guided to the dancer roller 4, and the dancer roller 4 engages with the web material 1. Further, the feed roller 7 is driven and rotated by the drive motor 6, and the web material 1 passes through the feed roller 7 and is sent to the slit position, slit into a plurality of strips, and the slit material 1 is sent to the winding position. , Each wound up. Further, the dancer roller 4 and the arm 5 can swing around the fulcrum 8 of the arm 5. Further, an air cylinder 9 is connected to the arm 5, and an air source such as a compressor is connected to the pressure valve 10 and the air cylinder 9. Air is supplied from the air source, passes through the pressure valve 10, and is guided to the air cylinder 9. This acts on the arm 5, the dancer roller 4 and the web material 1. The working direction is the downward direction in FIG. Therefore, tension is applied to the web material 1. The pressure of the air is adjusted by the pressure valve 10 so that the tension of the web material 1 can be arbitrarily selected. Therefore, the web material 1 can be slit accurately and wound up accurately.

The tension applying mechanism of this device has a dancer roller 4, an arm 5, and an air cylinder 9 supported by a frame 11, and a driving mechanism is
The frame 11, the dancer roller 4, the arm 5, and the air cylinder 9 can be moved by a driving mechanism. The driving mechanism includes a screw rod 12 and a servomotor 13. The screw rod 12 is screwed to the frame 11, and the servomotor 13 is connected to the screw rod 12. Therefore, the screw rod 12 is
Is rotated, the frame 11 can be moved by the screw rod 12, and the dancer roller 4, the arm 5, and the air cylinder 9 can be moved integrally with the frame 11. The moving direction is the downward direction and the upward direction in FIG. 1, the direction in which the air cylinder 9 and the dancer roller 4 act on the web material 1 and the opposite direction.

Further, this device has a winding diameter detector 14 and a control device 15. The winding diameter detector 14 is for detecting the winding diameter of the web 3 and is of an ultrasonic type or another type. The configuration of the winding diameter detector 14 itself is known,
The description is omitted. The control device 15 includes drive motors 2 and 6
And for driving and controlling the servo motor 13, a line speed setting device 16 is connected to the control device 15,
The control device 15 is connected to the winding diameter detector 14, the drive motors 2, 6, and the servomotor 13. The line speed setting device 16 is for setting the feed speed of the web material 1. The operation of the control device 15 will be described later. In addition, the control device 15 includes a rotation angle detector 17 and a position detector 18,
The rotation angle detector 17 is for detecting the rotation angle of the web 3, is composed of a pulse generator, and is connected to the rotation shaft of the web 3. The position detector 18 is for detecting the position of the dancer roller 4,
Consisting of a potentiometer, provided on the frame 11,
It is connected to the support shaft of the arm 5. The position detector 19 is for detecting the position of the frame 11, is composed of a potentiometer, and is connected to the frame 11.

In this apparatus, the web material 1 is
When the sheet is unwound and fed, the drive motors 2 and 6 are driven by the control device 15 to rotate the web 3 and the feed roller 7. Further, the line speed setting signal of the setting device 16 is sent to the control device 15, and the control device 15 calculates the rotation speeds of the material 3 and the feed roller 7, and the material 3 and the feed roller 7 are rotated at the calculated rotation speed. After rotating, the web material 1 is unwound and fed at the set speed of the setter 16.

When the web material 1 is unwound from the web 3, in addition to the rotation speed of the web 3, the winding diameter of the web 3 is related to the unwinding amount. The unwinding amount of the web material 1 is determined by the winding diameter. Therefore, when the rotation speed of the raw material 3 is calculated by the control device 15, the winding diameter of the raw material 3 is detected by the winding diameter detector 14, and a detection signal is sent to the control device 15. And the setting device 16
Based on the line speed setting signal and the winding diameter detection signal of the detector 14, the control device 15 calculates the rotation speed of the raw fabric 3. Further, when the winding diameter of the raw material 3 is detected by the winding diameter detector 14, the eccentric amount of the raw material 3 affects the winding diameter. In one rotation cycle of the raw material 3, the winding diameter becomes the maximum value D.
It increases to max and decreases to the minimum value Dmin. Therefore, in this device, the average value D
m is calculated, and the rotation speed N of the raw material 3 is calculated from the set speed V of the setting device 16 and the average value Dm of the winding diameter.

N = V / (πDm)

The web 3 rotates at the rotation speed N.

Therefore, even if the web material 1 is unwound from the raw material 3 and the average value Dm of the winding diameter is gradually reduced, the web material 1 is unwound at the set speed V of the setter 16 regardless of this. In one rotation cycle of the web 3, the unwinding amount of the web material 1 changes depending on the eccentric amount of the web 3.
For this reason, as it is, for example, when the winding diameter of the raw material 3 increases to the maximum value Dmax, thereby increasing the unwinding amount of the web material 1, at the position of the dancer roller 4,
The supply amount of the web material 1 increases more than the discharge amount, and the dancer roller 4 and the arm 5 swing downward in FIG.
Conversely, when the winding diameter of the web 3 is reduced to the minimum value Dmin, thereby reducing the unwinding amount of the web material 1, the supply amount of the web material 1 is smaller than the discharge amount at the position of the dancer roller 4. Then, the dancer roller 4 and the arm 5 swing upward in FIG. As a result, the action angle between the arm 5 and the air cylinder 9 changes, and the tension of the web material 1 changes.

Based on this, in this apparatus, at the time of the first rotation or several rotations of the raw material 3, the eccentric amount of the raw material 3 is read by the control device 15 based on the winding diameter detection signal of the detector 14. Web material 1 due to the eccentricity of the web 3
Is calculated. For example,
In addition to the winding diameter detection signal, the rotation angle of the raw web 3 is detected by a rotation angle detector 17 and the detected signal is transmitted to the control device 15.
And in the control device 15, as shown in FIG.
Rotation angle of material 3 (0, 90, 180, 270, 36
0) (Dmax, Dm, Dmi)
n) is recognized and stored. Further, the unwinding amount of the web material 1 is obtained from the winding diameter and the rotation speed N of the raw material 3, and a change pattern thereof is predicted and calculated. Thereafter, the servo motor 13 is program-controlled by the controller 15 based on the predicted and calculated change pattern, and the frame 11, the dancer roller 4, the arm 5, and the air cylinder 9 are controlled.
Moves.

For example, when the unwinding amount of the web material 1 increases due to the eccentric amount of the web 3, the supply amount of the web material 1 increases at the position of the dancer roller 4 from the discharge amount. When the output amount increases, the servo motor 13 is program-controlled by the controller 15 based on the change pattern of the unwind amount, and the frame 11
Moves downward in FIG. The moving direction is a direction in which the air cylinder 9 acts on the arm 5, the dancer roller 4 and the web material 1, and the moving amount corresponds to the increase amount of the web material 1. Therefore, even if the unwinding amount of the web material 1 increases, the dancer roller 4 and the arm 5 do not swing, and the operation angle between the arm 5 and the air cylinder 9 does not change. Therefore, the tension of the web material 1 does not change. Conversely, when the unwinding amount of the web material 1 decreases due to the eccentric amount of the web 3, the supply amount of the web material 1 decreases at the position of the dancer roller 4, but the unwinding amount of the web material 1. Is reduced, the servo motor 13 is program-controlled by the control device 15 based on the change pattern of the unwinding amount, and the frame 11 moves upward in FIG.
Move in the opposite direction. The amount of movement corresponds to the amount of reduction of the web material 1. Therefore, even if the unwinding amount of the web material 1 decreases, the dancer roller 4 and the arm 5 do not swing, the operating angle between the arm 5 and the air cylinder 9 does not change, and the tension of the web material 1 does not change.

At the same time, the position of the dancer roller 4 is detected by the position detector 18 and the position
The position of the frame 11 is detected by 9 and a detection signal thereof is sent to the control device 15. Based on the position detection signals of the detectors 18 and 19, the servo motor 13 is subjected to auxiliary feedback control. Therefore, based on the change pattern of the unwinding amount of the web material 1, the frame 11 moves accurately, the dancer roller 4 and the arm 5 do not swing, and the tension of the web material 1 does not fluctuate.

Normally, when the web material 1 is unwound from the web 3, the eccentric amount of the web 3 changes accordingly. 15, the eccentricity of the web 3 is monitored.
Is changed, the change pattern of the unwinding amount of the web material 1 is predicted and calculated again, and the servo motor 13 is program-controlled by the control device 15 based on the change pattern. Therefore, even if the eccentric amount of the web 3 changes, there is no problem and the tension of the web material 1 does not change.

Therefore, in the case of this device, it is not necessary to feedback-control the angular velocity of the raw material 3 as in the prior art, and there is no problem associated with its inertia. It is necessary to control the servo motor 13 by the control device 15 to move the frame 11, the dancer roller 4, the arm 5, and the air cylinder 9, but the inertia is not large and the response is high. Moreover, the control method is not the feedback control but the program control, and there is no problem associated with the time lag of the feedback control. Therefore, the frame 11 can be moved accurately, and when the web 3 has a large amount of eccentricity and has a large inertia, it is rotated at a high speed, and the web material 1 is unwound at a high speed. The arm 4 and the arm 5 do not swing, and the tension of the web material 1 does not fluctuate.

FIG. 3 shows another embodiment. In this embodiment, an air type is used as the tension applying mechanism, a hollow pipe 20 is horizontally arranged, and an air ejection hole 21 is formed in the lower half of the outer peripheral surface of the pipe 20. Further, an air source such as a compressor is connected to the pressure valve 22 and the pipe 20, and the web material 1 is sent under the pipe 20 between the web 3 and the feed roller 7, and air is sent from the air source. Supplied and pressure valve 2
2, is guided into the pipe 20, and is ejected from the ejection hole 21. Thus, air acts on the web material 1. The operation direction is the downward direction in FIG. Therefore,
A tension is applied to the web material 1. The pressure of the air is adjusted by the pressure valve 22 so that the tension of the web material 1 can be arbitrarily selected.

Further, the pipe 20 is supported by a frame 23, and the screw rod 12 is screwed to the frame 23, and the servomotor 13 is connected to the screw rod 12, as in the apparatus of FIG. Therefore, the screw rod 12 can be rotated by the servo motor 13, and the frame 23 and the pipe 20 can be moved by the screw rod 12. The direction of movement is downward and upward in FIG.
The direction in which zero air acts on the web material 1 and the opposite direction. In addition, the line speed setting device 16 is
5 and the control device 15 includes a winding diameter detector 14, a rotation angle detector 17, drive motors 2 and 6, and a servo motor 1.
3 is the same as that of the apparatus shown in FIG.

Further, in this embodiment, a photo sensor is used as the position detector 24 of the web material 1,
The position of the web material 1 is measured based on the amount of light received by the photo sensor, and this can be detected in an analog manner. The use of a potentiometer as the position detector 19 of the frame 23 is the same as in the apparatus of FIG. 1, and the control device 15 is connected to the position detectors 19 and 24.

Then, similarly to the apparatus shown in FIG.
Is unwound and fed from the web 3, a speed setting signal of the setting device 16 is sent to the control device 15, and the control device 15 calculates the rotation speeds of the web 3 and the feed roller 7, and The feed roller 7 rotates at the calculated rotation speed, and the web material 1 is unwound and sent at the set speed of the setter 16. Further, the winding diameter of the material 3 is detected by the winding diameter detector 14, a detection signal thereof is sent to the control device 15, and the rotation angle of the material 3 is detected by the rotation angle detector 17, and the detection signal is controlled. At the first or several rotations of the web 3, the controller 15 reads the eccentric amount of the web 3 based on the winding diameter detection signal of the detector 14, and the eccentricity of the web 3 is obtained. The change pattern of the unwinding amount of the web material 1 according to the amount is predicted and calculated. Thereafter, the servo motor 13 is program-controlled by the controller 15 based on the predicted and calculated change pattern,
The frame 23 and the pipe 20 move.

For example, when the unwinding amount of the web material 1 increases due to the eccentricity of the raw material 3, the supply amount of the web material 1 increases at the position of the pipe 20 from the discharge amount. When the output amount increases, the servo motor 13 is program-controlled by the control device 15 based on the change pattern of the unwind amount, and the frame 23 and the pipe 20 move downward in FIG. The moving direction is a direction in which the air of the pipe 20 acts on the web material 1, and the moving amount corresponds to the increase amount of the web material 1. Therefore, even if the unwinding amount of the web material 1 increases, the positional relationship between the web material 1 and the pipe 20 does not change. Therefore,
The tension of the web material 1 does not change. Conversely, when the unwinding amount of the web material 1 decreases due to the eccentric amount of the raw material 3, the supply amount of the web material 1 decreases at the position of the pipe 20 from the discharge amount. Is reduced, the servo motor 13 is program-controlled by the control device 15 based on the change pattern of the unwinding amount, and the frame 23 and the pipe 20 move upward in FIG. 2 and move in the opposite direction. The amount of movement corresponds to the amount of reduction of the web material 1. Therefore, even if the unwinding amount of the web material 1 decreases, the positional relationship between the web material 1 and the pipe 20 does not change. Therefore, the tension of the web material 1 does not change.

At the same time, the position of the web material 1 is detected by the position detector 24 and the position
Thus, the position of the frame 23 is detected, the detection signal is sent to the control device 15, and based on the position detection signals of the detectors 19 and 24, the servo motor 13 is subjected to auxiliary feedback control. Therefore, based on the change pattern of the unwinding amount of the web material 1, the frame 23 moves accurately, and the positional relationship between the web material 1 and the pipe 20 does not change.
The tension of the web material 1 does not change. Web material 1
The controller 15 monitors the eccentricity of the web 3 while the web 3 is unwound from the web 3, and when the eccentricity of the web 3 changes, the change pattern of the unwinding amount of the web material 1 is predicted again. The control device 1 is calculated and based on the change pattern,
5, the servo motor 13 is program-controlled.
Therefore, even if the eccentric amount of the web 3 changes, there is no problem.

Therefore, even in the apparatus shown in FIG.
5, the servo motor 13 may be program-controlled to move the frame 23 and the pipe 20, and the inertia is not large and the response is high. Moreover, the control method is not the feedback control but the program control, and there is no problem associated with the time lag of the feedback control. Therefore, the frame 23 and the pipe 20 can be moved accurately, and when the web 3 has a large amount of eccentricity and has a large inertia, it is rotated at a high speed to unwind the web material 1 at a high speed. Also, the same effect can be obtained without the tension of the web material 1 fluctuating.

In addition, as shown in FIG. 4, as in the apparatus shown in FIG. 1, a tension applying mechanism of a dancer roller type is used, and the air cylinder 9 and the dancer roller 4 are applied to the web material 1 in the left direction of FIG. The tension may be applied to the web material 1 by acting. Conversely, in the right direction, the air cylinder 9 and the dancer roller 4 may act on the web material 1 to apply tension to the web material 1. And
Based on the change pattern of the unwinding amount of the web material 1 according to the eccentric amount of the raw material 3, the servo motor 13 is program-controlled by the control device 15 to rotate the screw rod 12, and the left and right directions in FIG. When the frame 11 is moved by the screw rod 12, the dancer roller 4 and the arm 5 do not swing and the tension of the web material 1 does not fluctuate. In the pneumatic tension applying mechanism of FIG. 3, an air ejection hole 21 is formed in the left half or the right half of the pipe 20, and the web material 1 is guided to the left or the right of the pipe 20, and the air is directed in the left or right direction. It acts on the web material 1 to apply tension to the web material 1.
It is also conceivable that the servo motor 13 is program-controlled by the control device 15 to move the frame 23 and the pipe 20 leftward and rightward.

[0029]

As described above, according to the present invention, when the web 3 has a large eccentricity and a large weight, it is rotated at a high speed to unwind the web material 1 at a high speed. However, the intended purpose can be achieved without the tension of the web material 1 fluctuating.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a graph showing a characteristic of an unwinding amount of the web material of FIG. 1;

FIG. 3 is an explanatory diagram showing another embodiment.

FIG. 4 is an explanatory diagram showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Web material 2 Drive motor 3 Raw material 4 Dancer roller 9 Air cylinder 11 Frame 12 Screw bar 13 Servo motor 14 Winding diameter detector 15 Control device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 23/18-23/198 B65H 26/00-26/08

Claims (2)

(57) [Claims] 1. A web material is rotated by a drive motor, and the web material is unwound from the web material and fed.
An apparatus in which a tension applying mechanism acts on the web material in the feed path, wherein the tension applying mechanism is connected to a frame supporting the tension applying mechanism, and the frame and the tension applying mechanism act on the web material. A driving mechanism for moving in the direction and the opposite direction thereof, connected to a winding diameter detector and the driving mechanism for detecting the winding diameter of the raw material, based on a winding diameter detection signal of the detector,
The eccentricity of the raw material is read, a change pattern of the unwinding amount of the web material is predicted and calculated according to the eccentric amount of the raw material, and based on the change pattern, the drive mechanism is program-controlled to control the frame and the frame. A web material feeding device, comprising: a control device for moving a tension applying mechanism. 2. A web material is rotated by a drive motor, and the web material is unwound from the web material and fed.
An apparatus in which a moving roller is engaged with the web material on the feed path, wherein the moving roller is connected to a frame supporting the moving roller, and the frame and the moving roller are connected in a direction in which the moving roller engages with the web material. A driving mechanism for moving in the opposite direction, connected to a winding diameter detector for detecting the winding diameter of the raw fabric and the driving mechanism, based on a winding diameter detection signal of the detector,
The eccentricity of the raw material is read, a change pattern of the unwinding amount of the web material is predicted and calculated according to the eccentric amount of the raw material, and based on the change pattern, the drive mechanism is program-controlled to control the frame and the frame. A web material feeding device, comprising: a control device for moving a moving roller.