JP2003292204A - Winder for tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winder for a tape capable of making a nozzle follow to the peripheral surface of a tape roll and applying a constant pressure to the peripheral surface of the tape roll. <P>SOLUTION: In this winder 10 for the tape, a displacement gage 30 is fitted to the nozzle 16. The distance between the nozzle 16 and the peripheral surface of tape roll 15 is measured by the displacement gage 30. A linear motor 24 and a voice coil motor 26 are controlled based on the measurement data. The nozzle 16 is made to move forward/backward to the peripheral surface of the tape roll 15. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape take-up device, and more particularly to a take-up device for winding a belt-like object such as a magnetic tape in a roll shape around a take-up shaft. 2. Description of the Related Art A winding device described in Japanese Patent Application Laid-Open No. 6-329308 has a contact pressure roll that is in rolling contact with the outer peripheral surface of a tape roll during winding, and an outer peripheral surface of the tape roll during winding. Wind pressure means for blowing air, and a movable part moving means for displacing the contact pressure roll and the wind pressure means according to the winding diameter of the tape roll are provided. In this winding device, various problems occur when the wind pressure applied to the tape roll fluctuates. For example, when the wind pressure is reduced, the air trapped in the tape increases, so the winding hardness becomes loose,
There arises a problem that the edges of the wound tape are uneven. Conversely, when the wind pressure increases, the winding hardness becomes harder,
There is an adverse effect on quality, such as tape damage. For this reason,
It is necessary to always control the distance between the nozzle that is the wind pressure means and the outer peripheral surface of the tape roll so that the wind pressure applied to the outer peripheral surface of the tape roll is constant. Therefore, conventionally, the nozzle diameter is set by numerically calculating the winding diameter from the tape running speed and the reel rotation speed, and the nozzle is moved to the set position, thereby making the distance between the nozzle and the outer peripheral surface of the tape roll constant. I was in control. However, since the conventional winding device has to calculate the winding diameter including the eccentric amount of the tape roll at high speed, expensive high-speed calculation equipment is required. In addition, there is a problem that a complicated control system is required to correct the nozzle position at high speed according to the calculation result. Furthermore, when the thickness variation of the tape is large, the nozzle may come into contact with the outer peripheral surface of the tape roll to cause damage. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a winding device capable of causing the nozzle to follow the outer peripheral surface of the tape roll with a simple control system. To do. In order to achieve the above object, the present invention provides a winding shaft for winding a tape to form a tape roll, and an outer periphery of the tape roll when the tape is wound. In a tape winding device comprising a nozzle that blows gas toward the surface, moving means for moving the nozzle in a direction to advance and retreat with respect to the winding shaft, an outer peripheral surface of the nozzle and the tape roll, Based on the distance sensor that measures the distance of the distance and the measured value from the distance sensor,
And a control means for controlling the moving means so that a distance between the nozzle and the outer peripheral surface of the tape roll is constant. According to the present invention, the distance between the nozzle and the outer peripheral surface of the tape roll is measured by the distance sensor, and the nozzle is moved by the moving means based on the measured value. The distance can be controlled to be constant with high accuracy. Therefore, for example, even if the tape roll rotates in an eccentric state, the nozzle can be made to follow the outer peripheral surface of the tape roll quickly, and the distance between the outer peripheral surface of the tape roll and the nozzle can be controlled to be always constant. Thereby, a fixed pressure can be applied to the outer peripheral surface of a tape roll, and a tape can be wound up by uniform winding hardness. Since the present invention only controls the nozzle moving means based on the measured value of the distance sensor, expensive calculation means and a complicated control system are unnecessary. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a tape winding device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a tape winding device 1 according to the present invention.
FIG. As shown in FIG. 1, a winding device 10 has a reel (corresponding to a winding shaft) 12, and the reel 12 rotates by driving a motor (not shown). As a result, the tape 14 is wound around the outer peripheral surface of the reel 12 to form a tape roll 15. The nozzle 16 is disposed so as to face the outer peripheral surface of the tape roll 15 and is connected to an air supply source (not shown) via a hose 18. A slit-like opening (not shown) elongated in the width direction of the tape 14 is formed at the tip of the nozzle 16, and air is blown from the opening toward the outer peripheral surface of the tape roll 15. The opening of the nozzle 16 is formed with substantially the same width as the tape 14 (that is, the tape roll 15), and the outer surface of the tape roll 15 is uniformly pressed in the width direction by the air blown from the opening.
The air blowing position may be the outer peripheral surface of the tape roll 15, and is preferably slightly downstream (with respect to the running direction of the tape 14 from the position where the tape 14 is wound to become the tape roll 15 ( That is, a position slightly rotated in the clockwise direction in FIG. It may also be blown inert gas or other gas such as N ₂ in place of air. The nozzle 16 is fixed on a slider 20 constituting a linear guide 21, and the slider 20 is connected to the rail 2.
2 is slidably supported. The rail 22 is disposed in the radial direction of the reel 12 (that is, in a direction perpendicular to the surface in contact with the outer peripheral surface of the tape roll 15), and is fixed on the frame 24A of the linear motor 24. Thereby, the nozzle 16 is supported so as to be able to advance and retract with respect to the outer peripheral surface of the tape roll 15. A linear type voice coil motor 26 is provided on the upper surface of the frame 24A. The voice coil motor 26 is disposed behind the nozzle 16 (that is, opposite to the tape roll 15) and includes a rod 26A that urges the nozzle 16 forward. By pushing and pulling this rod 26 </ b> A, the nozzle 16 is moved to the tape roll 15.
It moves in the direction which advances / retreats with respect to the outer peripheral surface. By using the voice coil motor 26 configured as described above, the movement amount of the nozzle 16 is not so long, but the nozzle 16 can be moved with high accuracy and speed. Therefore, it is convenient to use the voice coil motor 26 when moving the nozzle 16 at a high frequency. It should be noted that the spring 28 may be disposed outside the rod 26A as shown in FIG. By providing this spring 28, the force for urging the nozzle 16 forward is assisted. Further, instead of using the spring 28, a constant current may be applied to the voice coil motor 26 to urge the nozzle 16 forward. The frame 24A is supported so as to be slidable along the guide 24B.
Is fixed to a casing (not shown) of the winding device 10. A driving unit (not shown) is provided inside the frame 24A so that the frame 24A can be moved along the guide 24B. As a result, the nozzle 16 can be moved in a direction to advance and retreat with respect to the outer peripheral surface of the tape roll 15. The linear motor 24
Can move the nozzle 16 greatly. Therefore, it is used when the nozzle 16 is moved largely at a low frequency. A displacement meter 30 is attached to the nozzle 16. The displacement meter 30 includes a nozzle 16 and a tape roll 15.
For example, a reflective optical sensor is used. The reflection type optical sensor projects light onto the outer peripheral surface of the tape roll 15 by a light projecting element (not shown), and receives the reflected light by a light receiving element (not shown), whereby the outer periphery of the nozzle 16 and the tape roll 15 is received. Measure the distance to the surface without contact. The linear motor 24 and the voice coil motor 26 are controlled so that the measured value becomes constant. The displacement meter 30 may be a fiber-type reflection sensor, a reflection-type sensor that measures the amount of reflected light as a distance, or a triangulation-type reflection sensor. . The displacement meter 30 transmits light from the upper direction to the lower direction of the nozzle 16 and the tape roll 15, and transmits the light transmitted through the gap between the nozzle 16 and the tape roll 15. A transmissive optical sensor configured to receive light with a light receiving sensor provided below may be used. Further, since the air pressure on the nozzle surface and the flow rate of air blown from the nozzle 16 change according to the change in the gap between the nozzle 16 and the tape roll 15, the nozzle 1
The flow rate and pressure of the air blown from 6 may be measured using an AE sensor or a pressure sensor, and an arithmetic process for converting the measured value into a distance between the nozzle 16 and the tape roll 15 may be performed. A contact sensor 32 is attached to the nozzle 16. The contact sensor 32 is a sensor that detects that the nozzle 16 has come into contact with the tape roll 15. For example, a piezo vibrometer or a displacement meter is used. Further, when the urging force of the nozzle 16 being urged in the direction of the tape roll 15 is measured by a load sensor or the like and it is detected that the urging force has become larger than a predetermined value, the nozzle 16 and the tape You may make it judge that the roll 15 contacted. In addition to measuring the urging force, for example, a change in potential with the tape roll may be detected. Further, the flow rate and pressure of air blown from the nozzle 16 are measured using an AE sensor and a pressure sensor,
When the measured value becomes a predetermined flow rate or less, or when the measured value becomes a predetermined pressure or more, it may be determined that the nozzle 16 and the tape roll 15 are in contact with each other. By using the contact sensor 32 or the like as described above, it is possible to detect that the nozzle 16 has contacted the tape roll 15. FIG. 2 is a block diagram showing the configuration of the winding device 10. As shown in the figure, the CPU of the winding device 10
34 is connected to the motion controller 36. The motion controller 36 is connected to the linear motor 24 via the motor driver 38 and is connected to the voice coil motor 26 via the motor driver 40 to control the driving of the linear motor 24 and the voice coil motor 26. The motion controller 36 is connected to a filter 42 and a filter 44.
2. The filter 44 is connected to the displacement meter 30 via the A / D converter 46. The distance data measured by the displacement meter 30 is A / D converted by the A / D converter 46 and then applied to the filters 42 and 44. The filter 42 is a high-pass filter, passes only signals having a frequency equal to or higher than the cutoff frequency, and attenuates signals having a frequency equal to or lower than the cutoff frequency. Depending on the data passing through this filter 42,
The motion controller 36 is connected to the voice coil motor 26.
To move the nozzle 16. On the other hand, the filter 44 is a low-pass filter and passes only a signal having a frequency equal to or lower than the cutoff frequency, and attenuates a signal having a frequency equal to or higher than the cutoff frequency. The motion controller 36 drives the linear motor 24 according to the data that has passed through the filter 44, and the nozzle 1
6 is moved. As a result, among the measurement data measured by the displacement meter 30, the nozzle 16 is moved by the voice coil motor 26 having a high frequency response for the high frequency fluctuation, and the low frequency fluctuation is detected. Thus, the nozzle 16 is moved by the linear motor 24 having a wide movable range, and the distance between the nozzle 16 and the tape roll 15 is controlled to be constant. The filters 42 and 44 are connected to the CPU 3
4 and the cut-off frequency is set by the CPU 34. The CPU 34 is connected to the air control unit 50 via the D / A converter 48. The air control unit 50 is a device that adjusts the flow rate and pressure of air supplied to the nozzle 16, and the air flow rate and pressure are set based on a command output by the CPU 34.
The running speed of the tape 14 and the rotation speed of the reel 12 are C
When input to the PU 34, the CPU 34 calculates the winding diameter of the tape roll 15 from these values, and based on the calculation result, the flow rate of air supplied to the nozzle 16, the pressure,
The cutoff frequency of the filters 42 and 44 is set. The contact sensor 32 includes an A / D converter 5
2. Connected to the contact determination circuit 56 through the filter 54. Therefore, measurement data such as vibration and position change of the nozzle 16 detected by the contact sensor 32 and the like, air flow rate, and air pressure are A / D converted by the A / D converter 52 and applied to the filter 54. The contact determination circuit 56 determines whether the nozzle 16 has contacted the tape roll 15 according to the data that has passed through the filter 54. When it is determined that the contact has been made, the CPU
34 issues a command to the motion controller 36 to drive the linear motor 24 and the voice coil motor 26 to retract the nozzle 16. The nozzle 16
The position of the tape 14 in contact with the CP as the NG part of the product
It may be recorded in U34 and removed in a later process. Or
Simultaneously with the contact determination, the rotation of the take-up reel 12 may be stopped. Next, the operation of the winding device 10 configured as described above will be described. The winding device 10 rotates the reel 12 to wind the tape 14 around the reel 12, and the tape roll 15
, And air is blown from the nozzle 16 onto the outer peripheral surface of the tape roll 15 to bring the tape 14 into close contact with the outer peripheral surface of the tape roll 15.
Air entrainment between 4 is prevented. At that time, the winding device 10 measures the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 with a displacement meter 30 or the like, and drives the linear motor 24 and the voice coil motor 26 based on the measured value. The nozzle 1 so that the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 is constant.
Move 6. That is, the nozzle 16 and the tape roll 1
Since the nozzle 16 is moved at a high speed and a long displacement based on the measured value of the distance to the nozzle 5, the nozzle 16 and the tape roll 15
Can be controlled with high accuracy. When the nozzle 16 is moved, among the measurement data of the displacement meter 30, the nozzle 16 is moved using the voice coil motor 26 for the high frequency fluctuation, and the linear motor 24 is used for the low frequency fluctuation. The nozzle 16 is moved. Therefore, the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 can always be controlled to be constant regardless of whether the measurement data has large frequency fluctuations or small frequency fluctuations. For example, regarding a high distance fluctuation of the frequency generated by the eccentricity of the tape roll 15,
The nozzle 16 is moved using the voice coil motor 26. Thereby, the distance of the nozzle 16 and the outer peripheral surface of the tape roll 15 can be always kept constant. Thus, according to the winding device 10 of the present embodiment, the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 is measured by the displacement meter 30, and the nozzle 16 is moved forward and backward based on this measured value. As a result, the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 can always be kept constant. Therefore, a constant pressure can always be applied to the outer peripheral surface of the tape roll 15, and the tape 14 can be wound with an appropriate winding hardness. Further, according to the winding device 10, the displacement meter 30.
Is divided into high-frequency fluctuation and low-frequency fluctuation, and the high-frequency fluctuation is divided into the voice coil motor 26.
Therefore, the nozzle 16 is moved by the linear motor 24 for the low-frequency fluctuation, so that the followability of the nozzle 16 with respect to the outer peripheral surface of the tape roll 15 can be improved. In the above-described embodiment, the voice coil motor 26 is used as a high-frequency motor. However, the embodiment is an actuator that moves the nozzle 16 with a short cycle with high accuracy, as represented by a laminated piezoelectric actuator, for example. May be. If the linear motor 24 that can follow even a high frequency with high accuracy and good response is used, the voice coil motor 26 may not be used. In the above-described embodiment, the nozzle 16 having a slit shape is used. However, the shape of the nozzle 16 is not limited to this. For example, a nozzle (not shown) having a round hole opening is formed. ) May be provided in the width direction of the tape 14. As described above, by controlling the gap between the nozzle 16 (air press head) and the tape roll 15 to a predetermined short distance, the tape 14 is adjusted to the winding diameter of the tape roll 15 or the winding speed of the tape 14. It becomes possible to wind up with uniform winding hardness without depending on it. Further, by controlling the gap (gap), air pressure, and urging force between the nozzle 16 and the tape roll 15, the contact between the nozzle 16 and the tape 14 is prevented, and the trouble that the tape 14 is damaged is prevented. Is possible. Even if the nozzle 16 and the tape 14 are in contact with each other, the winding of the tape 14 is interrupted by detecting the contact between the nozzle 16 and the tape 14, or the damaged portion of the tape 14 is damaged. Can be specified. As described above, according to the tape winding apparatus of the present invention, the distance between the nozzle and the outer peripheral surface of the tape roll is measured, and the nozzle is moved based on the measured value. Therefore, the distance between the nozzle and the outer peripheral surface of the tape roll can be always controlled to be constant. Therefore, since a constant urging force can be applied to the outer peripheral surface of the tape roll, the tape can be wound with a uniform winding hardness.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a winding device according to the present invention. FIG. 2 is a block diagram showing the configuration of the winding device in FIG. 1. DESCRIPTION OF SYMBOLS 10. ... reel, 14 ... tape, 15 ...
Tape roll, 16 ... nozzle, 18 ... hose, 20 ... slider, 22 ... rail, 24 ... linear motor, 24A ...
Frame, 24B ... Guide, 26 ... Voice coil motor, 28 ... Spring, 30 ... Displacement meter, 32 ... Contact sensor, 34 ... CPU, 36 ... Motion controller, 3
8 ... Motor driver, 40 ... Motor driver, 42 ... Filter, 44 ... Filter, 46 ... A / D converter, 4
8 ... D / A converter, 50 ... Air control unit, 52
... A / D converter, 54 ... filter, 56 ... contact determination circuit

Claims (1)

What is claimed is: 1. A winding shaft for winding a tape to form a tape roll; and a nozzle for blowing gas toward the outer peripheral surface of the tape roll when winding the tape. In the tape winding apparatus, a moving unit that moves the nozzle in a direction to advance and retreat with respect to the winding shaft, a distance sensor that measures a distance between the nozzle and the outer peripheral surface of the tape roll, and the distance sensor And a control means for controlling the moving means so that the distance between the nozzle and the outer peripheral surface of the tape roll is constant based on the measured value from the tape winding device.