JP2005008410A - Meandering controller and beltlike body cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meandering controller capable of precisely detecting meandering when conveying a beltlike body and precisely controlling meandering of the beltlike body during running and to provide a beltlike body cutting device capable of cutting in such a way that the beltlike body has satisfactory edge straight property. <P>SOLUTION: This meandering controller is provided with a reflection type optical sensor 16 composed of a laser beam source for applying laser beam L for the beltlike body 10 during running while scanning and a light receiving part constituted integrally with the laser beam source so as to receive and detect reflected light R of laser beam. An edge part 2 of the beltlike body is detected based on a detection signal from the light receiving part to correct a running position of the beltlike body based on a detection position of the edge part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a meandering control device and a strip cutting device for controlling meandering of a running strip.

  When a flexible strip (web) such as an original tape is continuously run and transported to a cutting device and cut into multiple pieces, for example, the strip is placed in an accurate position and sent to the cutting device. An apparatus for correcting a deviation in a direction orthogonal to the traveling direction caused by the belt-like meandering during traveling is known as an EPC (Edge Position Controller) device (see Patent Document 1 and Patent Document 2 below). . In such an EPC apparatus, deviation detection during running of the belt-like body is performed by detecting the edge of the belt-like body using various sensors such as a photoelectric sensor, an air sensor, and an ultrasonic sensor, and a transport roller or the like is detected by an actuator based on the detection result. By adjusting the position, the meandering of the belt-like body is controlled.

  On the other hand, there is a strict requirement for straightness of the tape edge for the recent magnetic tape for data backup of computers, etc., and the strip of the magnetic tape is transported to the tape cutting device for manufacturing such magnetic tape. When cutting, it is necessary to control the meandering amount of the belt-like body at the cutting portion with high accuracy. In this case, by using a transmission type optical sensor to detect the deviation of the belt-shaped body, it becomes easy to adjust the position of the light emitting part and the light receiving part, but the curl of the edge of the magnetic tape and the thickness of the coating edge It is difficult to accurately detect the edge of the original magnetic tape due to the influence of unevenness of the extension of the edge, deformation of the base in the drying process / heat treatment process, and the like.

  Also, it is known to use a reflection type optical sensor composed of a linear light source and a one-dimensional image sensor as a sensor for detecting the edge of a strip in an EPC apparatus (see Patent Document 3 below). A reflection type optical sensor will be described with reference to FIG.

  The light sensor of FIG. 8 irradiates the sheet 1 held in the detection roll R with light that is elongated in the width direction of the sheet 1 from a linear light source LL such as a fluorescent lamp, and reflects light from the irradiation surface. Is received by the one-dimensional image sensor S. The detection roll RR also serves as a guide roll for guiding the sheet 1 and uses a black rubber roll wider than the sheet width. As shown in FIG. 8, the light from the linear light source LL is projected from an oblique direction (incident angle θ) with respect to the tangent to the detection roll RR, and the irradiation range is the edge position of the sheet 1 in the direction perpendicular to the drawing sheet. The edge position is detected. The one-dimensional image sensor S is arranged at a position where it can receive reflected light that is regularly reflected at the reflection angle θ on the irradiation surface. When light strikes each photodiode of the one-dimensional image sensor S, a pulse train corresponding to the amount of received light is an analog signal. The edge position of the sheet 1 is detected based on the signal.

However, when the optical sensor as shown in FIG. 8 is arranged as an edge detection sensor of the EPC apparatus, the linear light source LL and the one-dimensional image sensor S are installed so that the incident angle and the reflection angle are the same angle θ. This is difficult because fine adjustment of both angles is difficult, and if the incident angle and the reflection angle are deviated, the detection accuracy is lowered and the EPC device cannot be fully operated. In addition, since the linear light source LL is composed of a fluorescent lamp, there is a risk of erroneous detection due to the influence of disturbance light from another fluorescent lamp or the like that is indoor lighting.
Japanese Patent Laid-Open No. 5-139589 JP-A-8-332440 Japanese Patent Laid-Open No. 9-5020

  In view of the above-described problems of the prior art, the present invention accurately detects meandering when a belt-like body such as a magnetic tape raw material is transported, and can control the meandering of the belt-like body while traveling. An object is to provide an apparatus. It is another object of the present invention to provide a strip cutting apparatus that can cut a strip so that the strip like a magnetic tape has good edge linearity.

  In order to achieve the above object, a meandering control device according to the present invention includes a light source for irradiating a traveling strip with a light beam, a light receiving unit for receiving and detecting reflected light of the light beam, and a light receiving unit. A detection unit that detects an edge portion of the belt-like body based on a detection signal of the light source, and a correction unit that corrects a traveling position of the belt-like body based on a detection position of the edge portion, the light source and the light receiving unit And are configured integrally.

  According to the meandering control device, since the light source and the light receiving unit are integrally formed, adjustment of the arrangement position of the light source and the light receiving unit with respect to the traveling strip is facilitated, and a reduction in detection accuracy can be prevented. For this reason, meandering when the belt-like body is conveyed can be detected with high accuracy, and the meandering of the belt-like body while traveling can be accurately corrected and controlled.

  In the meandering control apparatus, it is preferable that the light source is configured by an LED (light emitting element) and the light receiving unit is configured by a CCD sensor.

  Further, it is preferable that the light source is composed of a semiconductor laser, and the belt-like body is irradiated while scanning the laser beam. That is, the meandering control device according to such a preferred embodiment is integrated with the laser light source so as to receive and detect the laser light source that irradiates the traveling belt-like body while scanning the laser light and the reflected light of the laser light. A reflection-type optical sensor configured with a light receiving unit configured in the above, a detection unit that detects an edge portion of the strip based on a detection signal from the light receiving unit, and a detection position of the edge unit A correction unit that corrects the travel position of the belt-like body. According to this meandering control device, since the laser light source and the light receiving unit are integrally configured, it is easy to adjust the arrangement position of the reflective optical sensor with respect to the running belt, and it is possible to prevent a decrease in detection accuracy. Irradiation is performed while scanning with laser light, so that there is no influence of disturbance light and detection accuracy is improved. For this reason, meandering when the belt-like body is conveyed can be detected with high accuracy, and the meandering of the belt-like body while traveling can be accurately corrected and controlled.

  By controlling the scanning speed of the laser beam based on the traveling speed of the strip in the meandering control device, the edge portions can be detected at predetermined intervals in the traveling direction, and the meandering of the traveling strip can be accurately controlled. .

  Further, by arranging the optical sensor so as to irradiate the edge of the band with the guide roll arranged to change the traveling direction of the band, the band is a guide roll. Since the vehicle travels while being wrapped around, it is possible to eliminate influences such as curling of the edge of the belt-like body and uneven thickness of the coating edge, and the detection accuracy of the edge portion is improved.

  Further, by configuring the outer peripheral surface of the guide roll so that the reflectance is different from that of the surface of the belt-like body, a difference in detection signal level occurs and the detection accuracy of the edge portion is improved.

  The detecting unit includes a differentiating circuit that differentiates the detection signal from the light receiving unit and outputs a differential signal, and the band-shaped body has a reflectance of a band-shaped region having a constant width along the edge portion with other regions. When different from each other, the edge portion is differentiated according to the scanning direction of the laser beam by distinguishing each differential signal output based on the edge portion and a boundary portion between the band-like region and the other region. It is preferable to detect. When the reflectivity is different on the surface of the belt-like body, each differential signal from the edge portion and the boundary portion can be distinguished by the scanning direction of the laser beam, so that the edge portion can be detected with high accuracy.

  A strip cutting apparatus according to the present invention includes a traveling unit that travels a flexible strip, a laser light source that irradiates the traveling strip with a laser beam, and a reflected light of the laser beam. A reflection-type optical sensor composed of a light receiving unit configured integrally with the laser light source so as to receive and detect the light, and a detection for detecting an edge portion of the strip based on a detection signal from the light receiving unit And a correction unit that corrects the travel position of the strip based on the detected position of the edge portion, and a cutting unit for cutting the strip that has been traveled in the travel direction. To do.

  According to this strip cutting device, since the laser light source and the light receiving unit are integrally configured, the arrangement position of the reflective optical sensor with respect to the strip during traveling can be easily adjusted, and a decrease in detection accuracy can be prevented. Since the laser beam is irradiated while scanning, the detection accuracy is improved without the influence of disturbance light. For this reason, since the meandering when the belt-like body is conveyed can be accurately detected and the meandering of the belt-like body during traveling can be accurately corrected and controlled, the linearity of the belt-like body in the running direction is improved at the cutting portion. Can be cut as follows. Therefore, the strip after cutting has good edge linearity.

  By controlling the scanning speed of the laser beam based on the traveling speed of the strip in the strip cutting device, the edge portion can be detected at a predetermined interval in the traveling direction, and the meandering of the strip during traveling is accurately controlled. it can.

  In addition, the traveling unit includes a guide roll disposed so as to change the traveling direction of the strip, and the optical sensor is disposed so as to irradiate the laser beam to the edge of the strip. Since the belt-like body travels while being wound around the guide roll, it is possible to eliminate the influence of the curl of the edge of the belt-like body, the thickness unevenness of the coating edge, and the like, and the detection accuracy of the edge portion is improved.

  Further, by configuring the outer peripheral surface of the guide roll so that the reflectance is different from that of the surface of the belt-like body, a difference in detection signal level occurs and the detection accuracy of the edge portion is improved.

  Further, in the case where the belt-shaped body is a magnetic tape raw material, and includes a coated region in which a magnetic film is formed on the entire surface and a strip-shaped uncoated region in which a certain width along the edge portion is uncoated, The detection unit includes a differentiating circuit that differentiates a detection signal from the light receiving unit and outputs a differential signal, and outputs each of the edge portions and a boundary portion between the uncoated region and the coated region. Preferably, the edge portion is detected by distinguishing the differential signal according to the scanning direction of the laser beam. When the reflectance is different between the uncoated area and the coated area on the surface of the magnetic tape, each differential signal from the edge and boundary can be distinguished by the scanning direction of the laser beam, so the edge can be accurately It can be detected.

  In addition, the adjustment unit is configured to adjust the traveling position of the strip in the vicinity of the upstream side of the cutting unit, so that the linearity with high accuracy obtained by controlling and correcting the meandering strip during traveling. Can be cut while maintaining

  Another strip cutting apparatus according to the present invention includes a traveling unit that travels a flexible strip, a light source that irradiates the traveling strip with a light beam, and a reflected light of the light beam. A light receiving unit configured integrally with the light source so as to detect, a detection unit for detecting an edge portion of the strip based on a detection signal from the light receiving unit, and a detection position of the edge unit It is provided with the correction part which corrects the driving | running | working position of the said strip | belt-shaped body, and the cutting part for cutting the said strip | belt-shaped body which has been traveled in a driving | running | working direction.

  According to this strip-shaped body cutting device, since the light source and the light receiving section are integrally formed, the arrangement position of the light source and the light receiving section with respect to the traveling strip can be easily adjusted, and a decrease in detection accuracy can be prevented. For this reason, meandering when the belt-like body is conveyed can be detected with high accuracy, and the meandering of the belt-like body while traveling can be accurately corrected and controlled. For this reason, since the meandering when the belt-like body is conveyed can be accurately detected and the meandering of the belt-like body during traveling can be accurately corrected and controlled, the linearity of the belt-like body in the running direction is improved at the cutting portion. Can be cut as follows. Therefore, the strip after cutting has good edge linearity.

  ADVANTAGE OF THE INVENTION According to this invention, the meander control apparatus which can detect the meandering at the time of conveying a strip | belt body like a magnetic tape raw material accurately, and can control the meandering of the strip | belt | belt_body in driving | running | working accurately can be provided. In addition, it is possible to provide a belt-shaped body cutting device that can cut a belt-shaped body so that the belt-shaped body has good edge linearity.

  Hereinafter, first, second and third embodiments of the present invention will be described with reference to the drawings.

  <First Embodiment>

  FIG. 1 is a side view showing a schematic configuration of the entire meandering control apparatus according to the present embodiment. FIG. 2 is a perspective view schematically showing a main part of the meandering control device of FIG.

  As shown in FIGS. 1 and 2, the meandering control device guides a flexible sheet-like belt-like body 10 by a plurality of guide rolls 12, 13, 14 from a roll wound body 11 wound in a roll shape. In order to detect the edge portion 2 of the belt-like body 10 traveling on the guide roll 14 when the belt-like body 10 is further conveyed downstream by the conveyance roller pair 15 that is rotationally driven by a motor or the like, the belt-like body 10 is detected. A reflection type optical sensor 16 that irradiates the laser beam L while scanning and receives the reflected light R, and a guide for correcting the meandering of the strip 10 based on the detection position of the edge portion 2 by the optical sensor 16. And an actuator 17 that moves the rotating shaft 14a of the roll 14 in the rotating shaft direction H and in the opposite direction H ′.

  The optical sensor 16 shown in FIG. 1 is arranged so as to irradiate laser light from a direction perpendicular to the tangent line on the guide roll 14. Necessary reflected light can be obtained with high accuracy by arranging it to irradiate.

  The guide roll 14 that detects the edge portion 2 of the belt-like body 10 is arranged so as to change the traveling direction of the belt-like body 10 that has traveled from the guide roll 13 on the upstream side. 14, the edge portion 2 is brought into close contact with the outer peripheral surface 14 b of the guide roll 14, and the influence of curling of the band-like body 10 and uneven thickness of the coating edge can be eliminated. Accuracy is improved. In addition, it is preferable that the amount of the belt-like body 10 held by the guide roll 14 to be wound is large, since the float of the belt-like body 10 from the guide roll 14 is reduced, and detection accuracy is improved.

  Further, the outer peripheral surface 14b of the guide roll 14 is made black or the like, so that the reflectance is different from that of the surface of the strip 10. As a result, a difference occurs in the detection signal level due to the difference in the amount of reflected light, and the edge detection accuracy is improved.

  The actuator 17 can be composed of an electric motor or a hydraulic actuator, but an electric motor with no possibility of oil leakage is preferable.

  The belt-like body 10 may be, for example, a magnetic tape raw material. As shown in FIG. 2, as shown in FIG. 2, a coating region 5 formed on the entire surface by applying a magnetic film to a relatively thin PET film, and a constant along the edge portion 2. And a strip-shaped uncoated region 3 of the PET film whose width is uncoated, and the coated region 5 has a higher reflectance than the uncoated region 3.

  1 and 2 will be described with reference to FIG. 3 is a plan view (a) showing the configuration of the laser light source and the scanning unit of the optical sensor of FIG. 1, and a side view (b) showing the scanning unit and the light receiving unit.

  As shown in FIGS. 3A and 3B, the reflection type optical sensor 16 includes a laser light source composed of a semiconductor laser 21, a polygon mirror 24, a motor 27 that rotates the polygon mirror 24 in the rotation direction r, and the like. And a line CCD sensor 30 in which light receiving elements are arranged in a line in the scanning direction S as a light receiving unit, and a scanning unit configured to deflect the laser light from the scanning direction S as shown in FIG. Are provided in the housing 16a. For example, a red semiconductor laser having a wavelength of 685 nm can be used as the semiconductor laser 21, but is not limited thereto.

  In the optical sensor 16, the laser light emitted from the semiconductor laser 21 is emitted toward the guide roll 14 through the collimator lens 22, the cylindrical lens 23, the polygon mirror 24, the fθ lens 25, and the folding mirror 26. At this time, the polygon mirror 24 is rotated at a constant speed in the rotation direction r by the motor 27, so that the laser beam L moves in the scanning direction S from the left side to the right side in the rotation axis direction H of the guide roll 14 as shown in FIG. It arrange | positions so that it may radiate | emit while scanning.

  In the optical sensor 16, the laser light L is deflected so as to move at a constant speed from the outer peripheral surface 14 b of the guide roll 14 in a direction orthogonal to the traveling direction F of the strip 10 and moving at a constant speed. Then, the reflected light R from the outer peripheral surface 14 b and the strip 10 enters the line CCD sensor 30, and a detection signal is output from the line CCD sensor 30.

  Next, a control system of the meandering control device shown in FIGS. 1 to 3 will be described with reference to FIGS. FIG. 4 is a block diagram showing a control system of the meandering control apparatus shown in FIGS. FIG. 5 is a diagram showing examples of the raw waveform and the differential waveform when the edge portion of the belt-like body and the boundary portion between the coated region and the uncoated region are detected by the meandering control device of FIGS. 1 to 4.

  As shown in FIG. 4, the control system of the meandering control device of FIGS. 1 to 3 includes a control unit 31 constituted by a central processing unit (CPU) and the like, and a differentiation circuit that differentiates a detection signal from the line CCD sensor 30. 32 and a speed sensor 33 that is disposed on the upstream side of the guide roll 14 and detects the traveling speed of the traveling strip 10.

  4 detects the edge portion 2 of the strip 10 traveling in the traveling direction F based on the differential signal from the differentiation circuit 32, and the detected position of the edge portion 2 is the reference position K in FIG. 2, the actuator 17 is controlled and operated to move the rotation shaft 14 a of the guide roll 14 in the rotation axis direction H or H ′ of FIG. The vehicle can travel along the line of the reference position K.

  Further, the control unit 31 drives the semiconductor laser 21 and the polygon mirror motor 27 at a predetermined timing, and scans the laser light L at a predetermined time interval to detect the edge 2 and travel the belt-like body 10. Can be run continuously during.

  Further, the control unit 31 controls the rotational speed of the polygon mirror motor 27 based on the traveling speed of the belt-like body 10 detected by the speed sensor 33 arranged on the upstream side of the guide roll 14, thereby scanning the laser beam. Can be changed according to the traveling speed of the belt-like body 10. For example, when the traveling speed of the strip 10 is 600 m / min, the scanning speed of the laser beam is set to 300 ms / 40 mm, so that the edge portion 2 of the strip 10 is detected at 30 mm intervals along the traveling direction F. The meandering of the strip 10 during traveling can be controlled with high accuracy.

  Next, the operation of the meander control apparatus shown in FIGS. 1 to 4 will be described with reference to FIG. As shown in FIG. 1, when the belt-like body 10 is driven by the pair of conveying rollers 15, the reflected light R of the guide roll 14 is reflected while scanning the laser light L from the optical sensor 16 in the scanning direction S at a predetermined scanning speed. Detection is performed by the line CCD sensor 30.

  The detection signal from the line CCD sensor 30 at this time is detected from the detection signal A1 from the outer peripheral surface 14b of the guide roll 14 and from the uncoated area 3 of the strip 10 as shown in the example of the raw waveform in FIG. The signal level difference with the signal A3 is relatively small. This is because the uncoated area 3 is a translucent PET film, and the difference between the reflected light quantity from the uncoated area 3 and the reflected light quantity from the outer peripheral surface 14b of the guide roll 14 is very small. Therefore, as shown in FIG. 5, the detection signal is differentiated by the differentiation circuit 32, thereby obtaining a change point between the detection signals A1 and A3 corresponding to the edge portion 2 as the differentiation signal B1.

  Further, as in the example of the raw waveform in FIG. 5, the signal level difference between the detection signal A3 from the uncoated region 3 of the strip 10 and the detection signal A5 from the coated region 5 is relatively large. This is because the coated region 5 has a higher reflectance than the uncoated region 3 and the amount of reflected light from the coated region 5 is large. Similarly, by differentiating the detection signal by the differentiating circuit 32, a change point between the detection signals A3 and A5 corresponding to the boundary portion 4 is obtained as the differential signal B2.

  Although the edge portion 2 and the boundary portion 4 can be detected by the differential signals B1 and B2 obtained as described above, the control unit 31 in FIG. 4 scans the laser beam in the scanning direction S as shown in FIG. Since the detected differential signal B1 corresponds to the edge portion 2, the differential signals B1 and B2 can be distinguished, and it is determined that the position of the edge portion 2 has been detected due to the presence of the first differential signal B1. Thus, the position of the edge portion 2 can be detected with high accuracy by detecting the position of the edge portion 2 with the differential signal in consideration of the scanning direction S of the laser beam.

  And when the detection position of the edge part 2 of the strip | belt-shaped body 10 has shifted | deviated to the right side from the reference position K like FIG. 5, for example, the control part 31 controls the actuator 17 and the guide roll 14 is made into the rotating shaft direction. By moving to H ′, the traveling position in the traveling direction F of the edge portion 2 of the strip 10 is corrected, and the strip 10 is controlled so that the edge 2 travels along the line of the reference position K.

  As described above, according to the meandering control device of the present embodiment, it is possible to accurately detect the meander when the belt-like body 10 is conveyed, and to accurately correct and control the meandering of the running belt-like body 10.

  Also, with conventional optical sensors, it is difficult to fine-tune the incident angle of the light source and the reflection angle from the strip to the same angle, and if the incident angle and the reflection angle deviate, the detection accuracy decreases. In contrast, the accuracy of the meandering control of the belt-like body is reduced, whereas according to the meandering control device of the present embodiment, the reflection type optical sensor 16 is configured integrally with the laser light source and the light receiving unit. Adjustment of the arrangement position with respect to the strip 10 during traveling of the detection target is facilitated, and a decrease in detection accuracy can be prevented.

  In addition, fluorescent lamps or the like that are conventional linear light sources have a risk of erroneous detection due to the influence of disturbance light, whereas according to the meandering control device of the present embodiment, laser light is irradiated while scanning. In addition, the detection accuracy is improved without the influence of disturbance light.

  <Second Embodiment>

  FIG. 6 is a side view showing a schematic configuration of the entire magnetic tape cutting apparatus according to the present embodiment. FIG. 7 is a front view of the cutting part of FIG.

  As shown in FIG. 6, the magnetic tape cutting device as the belt-shaped body cutting device according to the present embodiment continuously pulls out a web 50 that is a magnetic tape original wound around a rewind reel 51 in a roll shape. The tape is cut into a plurality of magnetic tapes 50a by the tape cutting unit 55, and the cut magnetic tapes 50a are continuously wound around the winding hubs 60 of the winding devices 59 via the guide rollers 58. It is configured as follows.

  The magnetic tape original fabric (web) 50 has a coated portion in which a magnetic layer is coated on a relatively thin PET film and an uncoated uncoated portion, as in the case of the above-described belt-shaped body 10.

  In the magnetic tape cutting device of FIG. 6, the web 50 rewound from the rewind reel 51 is conveyed to the cutting section 55 through the plurality of guide rolls 52 and 54 and the ground suction drum 53, but immediately upstream of the cutting section 55. The meandering control device shown in FIGS. 1 to 5 is provided on the guide roll 54, and the reflective optical sensor 16 is arranged so as to detect the edge portion of the web 50 on the guide roll 54.

  As shown in FIG. 7, the cutting portion 55 includes a web 50 between the rotary blade portion 56 having a plurality of rotary blades 56 a configured in a roller shape around which the web 50 is wound, and the rotary blade portion 56. And a rotary blade portion 57 having a plurality of rotary blades 57a that are cut into a plurality of magnetic tapes 50a. The web 50 is cut into a plurality of magnetic tapes 50a by cutting with the plurality of rotary blades 57a and the plurality of rotary receiving blades 56a.

  6 and 7 includes the meandering control device similar to that shown in FIGS. 1 to 5, and the laser light source and the light receiving unit are integrated, so that the reflective optical sensor is running. Adjustment of the arrangement position with respect to the original magnetic tape 50 can be facilitated, and a decrease in detection accuracy can be prevented, and since the laser beam is irradiated while scanning, the detection accuracy is improved without being affected by disturbance light. For this reason, meandering at the time of conveying a magnetic tape original fabric can be detected with high accuracy, and the meandering of the magnetic tape original fabric while traveling can be corrected and controlled with high accuracy. For this reason, since the magnetic tape original fabric 50 is not cut while meandering at the cutting portion 55 of FIGS. 6 and 7, the accuracy of linearity in each of the magnetic tapes 50a after cutting becomes good, and each magnetic tape 50a has good edge linearity.

  When the magnetic tape is conveyed, the meandering of the tape cannot be detected accurately, and the magnetic tape after cutting is meandered. If the reduced edge linearity magnetic tape is used for a tape cartridge, for example, a computer backup tape In the cartridge, the straightness of the magnetic tape is lowered, and there is a possibility that writing / reading of the servo signal may not be performed accurately. On the other hand, according to the magnetic tape cutting device of this embodiment, the magnetic tape Since the original fabric 50 is not cut while meandering, the cut magnetic tape 50a has a good edge linearity. For this reason, for example, in a tape cartridge for computer backup, the straightness of the magnetic tape is good. Thus, servo signal writing / reading can be performed accurately.

  <Third Embodiment>

  FIG. 9 is a plan view schematically showing the main part of the meandering control apparatus showing the present embodiment. In the meandering control device of FIG. 9, the integrated sensor 40 includes a light emitting element (LED) 41 extending linearly and a line CCD sensor 42 extending linearly substantially parallel to the light emitting element 41 in a housing 43. Are arranged in place of the optical sensor 16 of FIGS. 1 to 5.

  As shown in FIG. 9, the sensor 40 is arranged so that the substantially central portion of the light emitting element 41 and the line CCD sensor 42 in the longitudinal direction is located in the uncoated region 3 of the strip 10. LED light is emitted from the light emitting element 41 to the strip 10 by the length direction with the uncoated region 3 as a substantial center. Then, the reflected light enters the line CCD sensor 42, and the edge portion 2 and the boundary portion 4 can be detected by the differential signals B1 and B2 in the same manner as in FIG. In this case, since the relative positions of the edge portion 2 and the boundary portion 4 are as shown in FIG. 9, the control unit 31 in FIG. 4 can distinguish the differential signals B1 and B2 and can detect them with high accuracy.

  According to the configuration of FIG. 9, since the LED is used as the light source, the position of the edge portion 2 can be accurately detected even though it is not necessary to scan the irradiation light as in the case of the laser light source. Therefore, the same effect as that of the meandering control device of FIGS. 1 to 5 can be obtained. Note that the meandering control device of FIG. 9 can be applied to a strip-shaped body cutting device such as the magnetic tape cutting device of FIG.

  As described above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the technical idea of the present invention. For example, the meandering control device shown in FIGS. 1 to 5 is applied to a magnetic tape cutting device as shown in FIG. 6. However, the present invention is not limited to this, and can be suitably applied to, for example, a magnetic tape coating device. It is.

  Further, although the strip cutting apparatus according to the present invention is applied to the magnetic tape cutting apparatus as shown in FIG. 6, the present invention is not limited to this, and can be used for cutting other strips. It can be used for cutting a sheet-like body in which various coatings are formed on a transparent film.

  1 and 6, the meandering control device can be appropriately disposed at other positions, and the position of the edge of the belt-like body / web can be corrected at a position different from the back roller for detecting the edge. . The means for correcting the position of the edge part is not limited to the actuator constituting the correction part as shown in FIG. 2, and various correction means can of course be applied.

  1 to 4, when the belt-like body 10 travels at a constant traveling speed, the scanning speed of the laser beam may be set constant. In this case, the speed sensor of FIG. Can be omitted.

  Further, in FIG. 2, the laser beam L may be further scanned in the scanning direction S to detect the edge portion 2 ′ opposite to the edge portion 2 of the strip 10.

  3 scans the laser light from the laser light source with the polygon mirror, but it may be scanned by other means. For example, the laser light may be scanned by an acousto-optic deflection element or the like. You may make it scan in the scanning direction S of (a).

It is a side view which shows the schematic structure of the whole meander control apparatus which shows 1st Embodiment. It is a perspective view which shows roughly the principal part of the meandering control apparatus of FIG. FIG. 3 is a plan view (a) showing a configuration of a laser light source and a scanning unit of the optical sensor in FIGS. 1 and 2 and a side view (b) showing a scanning unit and a light receiving unit of the optical sensor. It is a block diagram which shows the control system of the meandering control apparatus of FIG. 1 thru | or FIG. FIGS. 1 to 4 are diagrams showing examples of raw waveforms and differential waveforms in association with the respective portions of the band when the edge portion of the band and the boundary between the application region and the non-application region are detected by the meandering control device of FIGS. It is. It is a side view which shows the schematic structure of the whole magnetic tape cutting device which shows 2nd Embodiment. It is a front view of the cutting part of FIG. It is a front view which shows the reflection type optical sensor comprised from a linear light source and a one-dimensional image sensor as a sensor for the edge detection of the conventional strip | belt-shaped body. It is a top view which shows roughly the principal part of the meandering control apparatus which shows 3rd Embodiment.

Explanation of symbols

14 ... guide roller 14b ... outer peripheral surface 16 of guide roller ... reflective optical sensor 17 ... actuator (correction unit)
21 ... Semiconductor laser (laser light source)
30 ... Line CCD sensor (light receiving part)
DESCRIPTION OF SYMBOLS 31 ... Control part 32 ... Differentiation circuit 40 ... Integrated sensor 41 ... Light emitting element, LED (light source)
42 ... Line CCD sensor (light receiving part)
DESCRIPTION OF SYMBOLS 10 ... Strip | belt body 2 ... Edge part 3 ... Unapplied part 4 ... Boundary part 5 ... Application | coating part 50 ... Web (strip | belt-shaped body), magnetic tape original fabric 50a ... Magnetic Tape 54 ... Guide roller 55 ... Cutting part F ... Traveling direction K ... Reference position S ... Scanning direction L ... Laser light, incident light R ... Reflected light

Claims (13)

A light source that irradiates a light beam to a strip in motion;
A light receiving unit that receives and detects reflected light of the light beam;
A detection unit that detects an edge portion of the strip based on a detection signal from the light receiving unit;
A correction unit that corrects the travel position of the belt-like body based on the detection position of the edge part, and
The meandering control device, wherein the light source and the light receiving unit are integrally configured.   2. The meandering control apparatus according to claim 1, wherein the light source is configured by an LED (light emitting element), and the light receiving unit is configured by a CCD sensor.   2. The meandering control apparatus according to claim 1, wherein the light source is composed of a semiconductor laser and irradiates the belt-shaped body while scanning the laser beam.   The integrally configured light source and light receiving unit are arranged to irradiate the light beam to the edge part of the band with a guide roll arranged to change the traveling direction of the band. The meandering control apparatus according to claim 1, 2, or 3.   The meandering control device according to claim 4, wherein an outer peripheral surface of the guide roll is configured to have a reflectance different from that of the surface of the belt-like body.   The meandering control device according to claim 3, wherein the scanning speed of the laser light is controlled based on a traveling speed of the belt-like body. The detection unit includes a differentiation circuit that differentiates a detection signal from the light receiving unit and outputs a differential signal,
When the reflectance of the band-shaped region having a constant width along the edge portion is different from that of the other regions, the band-shaped body includes the edge portion and a boundary portion between the band-shaped region and the other region. The meandering control device according to claim 3 or 6, wherein the edge portion is detected by distinguishing each differential signal output based on the scanning direction of the laser beam. A traveling unit that travels a flexible strip;
A laser light source that irradiates the traveling belt-like body while scanning with laser light, and a light receiving unit that is integrated with the laser light source so as to receive and detect reflected light of the laser light. A reflective optical sensor;
A detection unit that detects an edge portion of the strip based on a detection signal from the light receiving unit;
A correction unit that corrects the traveling position of the belt-like body based on the detection position of the edge part;
A strip cutting device comprising: a cutting unit for cutting the strip that has been traveled in the travel direction. The strip cutting apparatus according to claim 10, wherein a scanning speed of the laser beam is controlled based on a traveling speed of the strip. The traveling unit includes a guide roll disposed so as to change a traveling direction of the belt-shaped body, the light sensor is disposed so as to irradiate the laser beam to an edge portion of the belt-shaped body, and the guide roll The belt-shaped body cutting apparatus according to claim 8 or 9, wherein the outer peripheral surface of the belt-shaped body is configured to have a reflectance different from that of the surface of the belt-shaped body. The detection unit includes a differentiation circuit that differentiates a detection signal from the light receiving unit and outputs a differential signal,
When the reflectance of the band-shaped region having a constant width along the edge portion is different from that of the other regions, the band-shaped body includes the edge portion and a boundary portion between the band-shaped region and the other region. 11. The strip-shaped body cutting device according to claim 8, wherein the edge portion is detected by distinguishing each differential signal output based on the scanning direction of the laser light. The strip-shaped body cutting device according to any one of claims 8 to 11, wherein the adjustment section is configured to adjust a traveling position of the strip-shaped body in the vicinity of the upstream side of the cutting section. A traveling unit that travels a flexible strip;
A light source for irradiating the traveling strip with a light beam;
A light receiving unit configured integrally with the light source to receive and detect reflected light of the light beam;
A detection unit that detects an edge portion of the strip based on a detection signal from the light receiving unit;
A correction unit that corrects the traveling position of the belt-like body based on the detection position of the edge part;
A strip cutting device comprising: a cutting unit for cutting the strip that has been traveled in the travel direction.

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