JP2005089150A - Take-up device of tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a take-up device of a tape capable of making a nozzle certainly follow the outer peripheral surface of a tape roll and applying a certain pressure to the outer peripheral surface of the tape roll. <P>SOLUTION: In the take-up device 10, a position sensor 30 is mounted to the nozzle 16, the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 is measured by the position sensor 30, a linear motor 24 and a voice coil motor 26 are controlled based on the measurement data, and the nozzle 16 is moved back and forth with respect to the outer peripheral surface of the tape roll 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tape winding device, and more particularly to a winding device that winds a belt-like object such as a magnetic tape in a roll shape around a winding shaft.

The winding device described in Patent Document 1 includes a contact pressure roll that is in rolling contact with the outer peripheral surface of the tape roll during winding, a wind pressure unit that blows air onto the outer peripheral surface of the tape roll during winding, a contact pressure roll and a wind pressure. Movable means moving means for displacing the means according to the winding diameter of the tape roll. 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 amount of air that is wound on the tape is increased, so that the surface pressure in the radial direction in the tape roll is loosened and the edges of the wound tape are uneven. On the contrary, when the wind pressure increases, the winding hardness becomes hard, and the quality such as tape edge damage is adversely affected. 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 outer peripheral surface of the tape roll and the nozzle constant. I was in control.
JP-A-6-329308

  However, since the conventional winding device has to calculate the winding diameter including the eccentric amount of the tape roll at a high speed, expensive high-speed calculation equipment is required, and the nozzle position is set according to the calculation result at a high speed. There was a problem that a complicated control system was required to correct it. 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 that can cause a nozzle to follow the outer peripheral surface of a tape roll with a simple control system.

  In order to achieve the above object, the present invention includes a winding shaft that winds a tape to form a tape roll, and a nozzle that blows gas toward the outer peripheral surface of the tape roll when winding the tape. In the tape winding apparatus, a moving means for moving the nozzle in a direction to advance and retreat with respect to the winding shaft, a distance sensor for measuring 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.

  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. It can be controlled well and well. 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.

  In addition, 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 not required.

  According to the tape winding device according to 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 this measured value. It can always be 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.

  Preferred embodiments of a tape winding device according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a tape winding device 10 according to the present invention, and FIG. 2 is a plan view thereof.

  As shown in the figure, the winding device 10 has a reel (corresponding to a winding shaft) 12, and this reel 12 is connected to a motor (not shown). Then, by driving the motor, the reel 12 rotates, and the tape 14 is wound around the outer peripheral surface of the reel 12. Thereby, the tape roll 15 is formed. Although FIG. 1 and FIG. 2 show the reel 12 having no flange, the present invention is not limited to this, and a flanged reel provided with a flange on one or both ends may be used.

  The nozzle 16 is disposed so as to face the outer peripheral surface of the tape roll 15. As shown in FIGS. 3 and 4, an opening 16 </ b> A is formed at the tip of the nozzle 16. The opening 16 </ b> A is formed in a slit shape elongated in the width direction of the tape 14, and the size thereof is formed according to the dimension of the tape 14. For example, when the width of the tape 14 is 1/2 inch, the width W of the opening 16A is 8 to 15 mm, and the slit interval S (length in the running direction of the tape 14) is 0.1 to 0.3 mm, preferably 0. It is formed with 15 to 0.25 mm. Moreover, the depth D of a slit is formed, for example with the magnitude | size of 0.5-3.0 mm, and a pressure loss is adjusted by adjusting the dimension.

  When the point where the tape 14 contacts the tape roll 15 is defined as the contact point P (see FIG. 5), the air blowing position needs to be downstream from the contact point P in the winding direction. This is because even if air is blown onto the tape 14 upstream of the contact point P, the effect of adjusting the winding hardness of the tape roll 15 cannot be obtained. In order to enable contact detection, particularly contact detection in a transmissive manner, it is preferable to blow air in the range of 5 to 300 °, desirably 10 to 270 ° downstream of the contact point P.

  Further, the most preferable spraying position of air is preferably slightly downstream of the contact point P as shown in FIG. Specifically, it is preferable that the upstream edge portion Q of the nozzle 16 is downstream of the contact point P. That is, it is preferable to arrange the nozzle 16 so that the distance X from the contact point P to the edge portion Q in the winding direction is a positive number. When the nozzle 16 is arranged in this manner, the tape 14 can be prevented from vibrating when air is blown.

  As shown in FIGS. 1 and 2, the tape 14 is wound around the guide roller 13 and wound around the tape roll 15. The guide roller 13 is fixed to a housing (not shown) of the winding device 10. For this reason, as the winding diameter of the tape roll 15 increases, there is a problem that the position of the contact point P changes in the circumferential direction, and the positional relationship between the contact point P and the air blowing position changes. Therefore, when the winding diameter of the tape roll 15 is the smallest (see the two-dot chain line in FIG. 2), the guide roller 13 and the nozzle 16 are positioned so that the contact point P and the air blowing position satisfy the above relationship. Install. As a result, when the winding diameter of the tape roll 15 increases, the contact point P moves upstream in the winding direction, so that the air blowing position is always arranged downstream of the contact point P.

  The guide roller 13 may be attached to a frame 24A of a linear motor 24 described later and moved together with the nozzle 16. In this case, as the winding diameter of the tape roll 15 increases, the nozzle 16 moves so as to move backward from the reel 12, and the guide roller 13 also moves accordingly. Therefore, the relationship between the contact point P and the air blowing position. Is kept approximately constant. Therefore, air can always be blown downstream of the contact point P.

  The nozzle 16 arranged as described above is fixed on the slider 20 constituting the linear guide 21. The slider 20 is slidably supported on a rail 22 disposed in the radial direction of the reel 12 (that is, in a direction orthogonal to the surface in contact with the outer peripheral surface of the tape roll 15). 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 voice coil motor 26 is disposed behind the nozzle 16 (that is, on the side opposite to the tape roll 15). The voice coil motor 26 includes a rod 26 </ b> A that urges the nozzle 16 forward, and when the rod 26 </ b> A is pushed and pulled, the nozzle 16 is moved in a direction in which the nozzle 16 advances and retreats with respect to the outer peripheral surface of the tape roll 15. The voice coil motor 26 moves the nozzle 16 with high accuracy and speed, although the movement amount of the nozzle 16 is not so long. Therefore, it is convenient to use the voice coil motor 26 when moving the nozzle 16 at a high frequency.

  As shown in FIG. 1, a spring 28 is disposed outside the rod 26A. The spring 28 can assist the force for urging the nozzle 16 forward. Instead of the spring 28, a constant current may be applied to the voice coil motor 26 to urge the nozzle 16 forward.

  The means for urging the nozzle 16 is not limited to the voice coil motor 26, and for example, a leaf spring or a cylinder may be used.

  The linear guide 21 and the voice coil motor 26 described above are mounted on a frame 24 </ b> A constituting the linear motor 24. The frame 24A is slidably supported along the guide 24B, and the guide 24B is disposed in the radial direction of the reel 12 and is fixed to a housing (not shown). 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 supported by the linear guide 21 can be moved in a direction to advance and retreat with respect to the outer peripheral surface of the tape roll 15. Since the linear motor 24 configured as described above can move the nozzle 16 greatly, it is used when the nozzle 16 is moved largely at a low frequency.

  The means for moving the nozzle 16 in the direction to advance and retreat with respect to the tape roll 15 is not limited to the linear motor 24, and the nozzle 16 may be moved using, for example, a feed screw or a ball screw. . Alternatively, the nozzle 16 may be moved using a rack and pinion mechanism.

  A position sensor 30 is attached to the frame 24 </ b> A of the linear motor 24. The position sensor 30 is a sensor that measures the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15. For example, a reflective sensor using an optical fiber is used. As an example of the configuration of the position sensor 30, a coaxial type in which a light receiving side optical fiber (not shown) is arranged around a light projecting side optical fiber (not shown) is used. According to this position sensor 30, the distance between the nozzle 16 and the outer peripheral surface of the tape roll 15 is projected from the optical fiber on the light projecting side to the outer peripheral surface of the tape roll 15 and received by the optical fiber on the light receiving side. Measured without contact.

  As the position sensor 30, a distance may be measured using a transmission type optical sensor, a laser displacement meter, or an ultrasonic displacement meter. If the sensor for measuring the distance is installed on the upstream side of the nozzle 16, the shape and position of the tape roll 15 can be known in advance, so that the position control of the nozzle 16 can be performed satisfactorily. As a specific position of the sensor, a position downstream of the contact point P and 0.5 to 10 mm upstream from the nozzle 16 is preferable.

  Further, since the air pressure on the nozzle surface and the flow rate of the air blown from the nozzle 16 change according to the change in the gap between the nozzle 16 and the tape roll 15, the flow rate, flow velocity, and pressure of the air blown from the nozzle 16 are changed to the flow rate. Measurement may be performed using a sensor, a flow rate sensor, and a pressure sensor, and a calculation process may be performed to convert the measured value into a distance between the nozzle 16 and the tape roll 15.

  The winding device 10 is provided with light projecting elements 60A and 60B, light receiving elements 62A and 62B, a mirror 64, and a mirror 66 as contact detection sensors that detect contact between the nozzle 16 and the tape roll 15. The mirror 64 and the mirror 66 are arranged at positions facing each other with a gap between the nozzle 16 and the tape roll 15 interposed therebetween. The light projecting elements 60A and 60B are arranged side by side, and light receiving elements 62A and 62B are disposed on the opposite side of the linear motor 24 with respect to the light projecting elements 60A and 60B.

  The light projecting elements 60A and 60B irradiate the mirror 64 with slit light having a horizontal width of about 5 mm. The mirror 64 is attached at an angle that reflects the light emitted from the light projecting elements 60 </ b> A and 60 </ b> B toward the gap between the nozzle 16 and the tape roll 15. A mirror 66 is disposed on the opposite side of the mirror 64 through the gap, and this mirror 66 is attached at an angle so as to reflect the light passing through the gap toward the light receiving elements 62A and 62B. . Therefore, when there is a gap between the nozzle 16 and the tape roll 15, the light projected from the light projecting elements 60A and 60B is reflected by the mirror 64 and mirror 66 and received by the light receiving elements 62A and 62B. Further, when there is no gap between the nozzle 16 and the tape roll 15, the light projected from the light projecting elements 60 </ b> A and 60 </ b> B is blocked by the nozzle 16 or the tape roll 15 between the mirror 64 and the mirror 66. Therefore, the light receiving elements 62A and 62B do not receive the light from the light projecting elements 60A and 60B. Therefore, it is possible to detect that there is no gap between the nozzle 16 and the tape roll 15 due to the change in the amount of light received by the light receiving elements 62A and 62B, that is, the contact between the nozzle 16 and the tape roll 15.

  The components of the contact detection sensor described above (that is, the light projecting elements 60A and 60B, the light receiving elements 62A and 62B, the mirror 64, and the mirror 66) are attached to the frame 24A of the linear motor 24 via a support member (not shown). ing. Therefore, when the linear motor 24 is driven to move the frame 24A along the guide 24B, the mirrors 64 and 66 of the contact detection sensor move together with the nozzle 16. Therefore, since light is always irradiated between the nozzle 16 and the tape roll 15, the contact between the nozzle 16 and the tape roll 15 can be reliably detected. Further, since all the constituent members of the contact detection sensor are attached to the frame 24A and are moved simultaneously, the positional relationship does not change with each other, and stable contact detection can always be performed.

  The above-described mirrors 64 and 66 are preferably formed in accordance with the width of the tape 14. Thereby, even if the end of the reel 12 has a flange, the mirrors 64 and 66 can be prevented from coming into contact with the flange. By using the mirrors 64 and 66 formed in this way, even in a small space where the light projecting elements 60A and 60B and the light receiving elements 62A and 62B cannot be installed, light can be reliably irradiated.

  In the above-described embodiment, two sets of light projecting elements 60A and 60B and light receiving elements 62A and 62B are provided. However, when the width of the tape 14 is small, only one set may be used. If the width of the tape 14 is large, three or more sets may be provided. In that case, the light projecting elements or the light receiving elements may be arranged at equal intervals, but if the reel hub is crown-shaped or medium-thick, the center is densely arranged. It is good to arrange closely.

  The light projecting elements 60A and 60B and the light receiving elements 62A and 62B may be fixed to a housing (not shown) and only the mirrors 64 and 66 may be moved.

  Furthermore, without providing the mirrors 64 and 66, the light projecting elements 60A and 60B and the light receiving elements 62A and 62B may be arranged to face each other with a gap between the tape roll 15 and the nozzle 16. In this case, the light projecting elements 60A and 60B and the light receiving elements 62A and 62B are preferably mounted on the frame 24A of the linear motor 24 and moved together with the nozzle 16, but a wide light is emitted from the light projecting elements 60A and 60B. In this case, the light projecting elements 60A and 60B and the light receiving elements 62A and 62B may be fixed to a casing (not shown) of the winding device 10.

  The configuration of the contact detection sensor is not limited to the above-described example, and for example, a piezo vibrometer or a displacement meter may be used. In addition, a load cell may be used as a contact detection sensor, and the load cell may be used to measure the urging force of the nozzle 16 toward the tape roll 15 and to determine contact when the measured value exceeds a threshold value. . In this case, the contact determination may be made by detecting a potential change with the tape roll. Further, the flow rate, flow rate, and pressure of the air blown from the nozzle 16 are measured using a flow rate sensor, a flow rate sensor, and a pressure sensor, and contact determination is made when those measured values are below a threshold value. Good.

  An optical fiber sensor may be used as the contact detection sensor. In this case, a sensor in which the optical fiber on the light projecting side and the optical fiber on the light receiving side are integrated is attached to the upper surface and the lower surface of the nozzle 16. Then, light is irradiated from the optical fiber on the light projecting side toward the tape roll 15, and the reflected light is received by the optical fiber on the light receiving side. It is detected that the nozzle 16 and the tape roll 15 are in contact with each other by a change in the amount of received light.

  FIG. 6 is a block diagram illustrating a configuration of the winding device 10.

  As shown in the figure, the CPU 34 of the winding device 10 is connected to a 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, and the filter 42 and filter 44 are connected to the position sensor 30 via an A / D converter 46. The distance data measured by the position sensor 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. The motion controller 36 drives the voice coil motor 26 and moves the nozzle 16 in accordance with the data that has passed through the filter 42.

  On the other hand, the filter 44 is a low-pass filter, passes only signals having a frequency equal to or lower than the cutoff frequency, and attenuates signals having a frequency equal to or higher than the cutoff frequency. The motion controller 36 drives the linear motor 24 and moves the nozzle 16 according to the data that has passed through the filter 44.

  As a result, among the measurement data measured by the position sensor 30, the nozzle 16 is moved by the voice coil motor 26 having a high frequency response with respect to the high frequency fluctuation, and movable with respect to the low frequency fluctuation. The nozzle 16 is moved by the linear motor 24 having a wide 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 34, and the cutoff 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. When the running speed of the tape 14 and the rotation speed of the reel 12 are input to the CPU 34, the CPU 34 calculates the winding diameter of the tape roll 15 from these values, and supplies it to the nozzle 16 based on the calculation result. The flow rate and pressure of air and the cutoff frequency of the filters 42 and 44 are set.

  The light receiving elements 62A and 62B are connected to the contact determination circuit 56 via the A / D converter 52 and the filter 54. Therefore, the change in the amount of light detected by the light receiving elements 62A and 62B is 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 and stops driving the voice coil motor 26. As a result, the nozzle 16 moves backward due to the reaction force of the blown air. The position of the tape 14 in contact with the nozzle 16 may be recorded in the CPU 34 as an NG part of the product and removed in a later process. Alternatively, the rotation of the take-up reel 12 may be stopped simultaneously with the contact determination.

  Next, the operation of the winding device 10 configured as described above will be described.

  The winding device 10 rotates the reel 12 so that the tape 14 is wound around the reel 12 and a tape roll 15 is formed. At that time, by blowing air from the nozzle 16 to the outer peripheral surface of the tape roll 15, the tape 14 is brought into close contact with the outer peripheral surface of the tape roll 15, and air entrainment 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 by the position sensor 30 or the like, and drives the linear motor 24 and the voice coil motor 26 based on the measured value. The nozzle 16 is moved so that the distance between the tape roll 15 and the outer peripheral surface of the tape roll 15 is constant. That is, since the nozzle 16 is moved at a high speed and moved in a long displacement based on the measured value of the distance between the nozzle 16 and the tape roll 15, the distance between the nozzle 16 and the tape roll 15 can be controlled with high accuracy.

  When moving the nozzle 16, among the measurement data of the position sensor 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. To move. 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, with respect to a high frequency fluctuation caused 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 position sensor 30, and the nozzle 16 is moved forward and backward based on this measured value. 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 measurement data of the position sensor 30 is divided into high-frequency fluctuation and low-frequency fluctuation, and the nozzle 16 is moved by the voice coil motor 26 for the high-frequency fluctuation, so that the low-frequency fluctuation is obtained. Since the nozzle 16 is moved by the linear motor 24 with respect to the variation, 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, an actuator that moves the nozzle 16 with a short period and with high accuracy, such as a laminated piezoelectric actuator, may be used. . Further, if the linear motor 24 that can follow even high frequency with high accuracy and responsiveness 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) in which a round hole opening is formed is a tape. A plurality may be provided in the width direction of 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 does not depend on the winding diameter of the tape roll 15 or the winding speed of the tape 14. It is possible to wind up with uniform winding. 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, by detecting the contact between the nozzle 16 and the tape 14, the winding of the tape 14 is interrupted or the damaged portion of the tape 14 is specified. It becomes possible.

The perspective view which shows the winding apparatus which concerns on this invention The top view which shows the winding apparatus of FIG. Sectional view of the nozzle shown in FIG. Sectional drawing of the nozzle along line 4-4 in FIG. Explanatory drawing explaining the blowing position of air The block diagram which shows the structure of the winding apparatus of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Winding device, 12 ... 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 ... position sensor, 32 ... contact sensor, 34 ... CPU, 36 ... motion controller, 38 ... motor driver, 40 ... motor driver, 42 ... filter, 44 ... filter, 46 ... A / D Converter, 48 ... D / A converter, 50 ... Air control unit, 52 ... A / D converter, 54 ... Filter, 56 ... Contact determination circuit, 60A, 60B ... Light emitting element, 62A, 62B ... Light receiving element, 64, 66 …mirror

Claims (1)

In a tape winding device comprising a winding shaft that winds the tape to form a tape roll, and a nozzle that blows gas toward the outer peripheral surface of the tape roll when winding the tape,
Moving means for moving the nozzle in a direction to advance and retract with respect to the winding shaft;
A distance sensor for measuring the distance between the nozzle and the outer peripheral surface of the tape roll;
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 measurement value from the distance sensor;
A tape take-up device comprising:

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