JP3560443B2 - Tape edge position adjustment device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
For example, in the present invention, when a tape is fed at a constant pitch in a metal tape used as an outer conductor of a leaky coaxial cable, the edge position of the tape being conveyed is always detected and the deviation is automatically detected. The present invention relates to a tape edge position adjusting device for adjusting the tape position.
[0002]
[Prior art]
The leaky coaxial cable is used in places where radio waves are difficult to reach, such as in tunnels, underground shopping malls, and reinforced concrete buildings, and for mobile communication such as train radio and automobile radio. As a method of leaking radio waves from this coaxial cable, a method in which cuts (slots) are provided in an external conductor at a constant pitch and a predetermined inclination is known, and is mainly used in a communication system in the VHF and UHF bands. . There are cables such as LCX-20D, LCX-33D and LCX-43D of 50Ω system.
[0003]
When making a cut in aluminum or copper metal tape (hereinafter simply referred to as tape) used as an external conductor, the pitch and inclination values greatly affect the band of the leaked radio wave. Required. The tape wound in a roll is processed in a continuous operation while being conveyed in the longitudinal direction.However, the position in the width direction of the conveyed tape is not always constant due to turbulence of the roll. It may be displaced by swinging in the direction. For this reason, the positioning in the processing section is incorrect, and a large number of defective products are produced, thereby lowering the yield.
[0004]
Conventionally, in order to properly control the position of the tape in general tape feeding, a displacement sensor is arranged at the target position to detect the displacement in the width direction of the tape, and the position is adjusted on the upstream side of the tape conveyance and the tape is adjusted. 2. Description of the Related Art A servo system that performs control so as to reach a target position is known. However, this method requires a position control unit other than the servo amplifier of the motor, requires expensive equipment, and requires software for converting the edge deviation to the motor rotational position and software for adjusting the conversion ratio. There is a problem that the equipment cost is expensive. Since feedback is applied when the tape to be transported is unbalanced, the response is delayed by that amount, and there is a problem that it is difficult to always stably secure an appropriate position.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above situation, and is a simple and inexpensive equipment in the case where a shift in the width direction occurs during the transport of a tape, for example, for slot processing of a tape for an external conductor of a leaky coaxial cable. It is another object of the present invention to provide a tape edge position automatic adjusting device capable of automatically adjusting a width position with a high response speed and stably with high accuracy.
[0006]
[Means for Solving the Problems]
The tape edge automatic adjustment device of the present invention that solves the above-mentioned problems includes a displacement sensor that detects a displacement of a tape edge in a tape width direction in a tape transport path, and a roller axis angle downstream of the displacement sensor is set in a tape transport direction. An adjusting roller that can be displaced with respect to the tape sensor, and adjusts the width direction position of the tape by displacing the axis angle of the adjusting roller according to the amount of deviation of the tape edge from the displacement sensor. Is what you do.
[0007]
The adjustment of the axis angle of the adjustment roller with respect to the tape transport direction is performed by applying a voltage value corresponding to the amount of deviation of the tape edge to the piezoelectric element based on the detection output of the displacement sensor. If the adjustment roller is driven by swinging through, the voltage corresponding to the tape edge deviation amount is directly converted to the displacement amount of the piezoelectric element, so that no special conversion software is required, It is desirable that the equipment cost is low, the response speed is fast, and accurate control can be performed. And this apparatus can be suitably applied to the conveyance of the tape for the outer trunk of the coaxial leakage cable.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention will be described in detail with reference to the schematic diagram of FIG. In this embodiment, a case will be described in which the present invention is applied to tape feeding when a cut (slot) is formed at a constant pitch in a metal tape used as an outer body of a coaxial leakage cable.
Reference numeral 1 denotes a metal tape such as aluminum as an external conductor, reference numeral 1a denotes a roll thereof, reference numerals 2 and 3 denote fixing rollers for guiding a transport line for processing the tape, and reference numeral 4 denotes an adjustment roller. The adjusting roller 4 is provided on a platform 5 that is swingably provided around a rotating shaft (not shown) so that the roller axis angle with respect to the tape transport direction can be adjusted. Oscillatingly driven by the piezoelectric element 13 via the amplifying mechanism 7 described above. A lever 8 constituting the amplifying mechanism 7 is pivotally mounted on a shaft 9 so that an actuator of a piezoelectric element 13 is engaged with an engagement projection 10 provided at one end, and an engagement projection provided at the other end. 11 engages with the base 5 of the adjusting roller 4. The shaft 9 moves the distance between the engagement protrusion 10 and the engagement protrusion 11 at a predetermined ratio so that the swing amount of the engagement protrusion 11 is amplified at a predetermined ratio with respect to the swing amount of the engagement protrusion 10. Is provided at a position apportioned by.
[0009]
As described above, the piezoelectric element 13 is always engaged with the engagement projection 10 so as to press and drive one end of the lever 8, and the spring 6 acting on the other end of the lever 8 via the adjustment roller base 5. The lever 8 is positioned so that the lever has a predetermined swing angle against the urging force. Normally, the piezoelectric element 13 acts on the lever so that the axis of the adjusting roller 4 is perpendicular to the tape transport axis.
[0010]
Reference numeral 15 denotes a laser displacement sensor which is disposed between the roll 1a and the fixed roller 2 at a right angle to the tape edge on one side. In the present embodiment, the laser displacement sensor 15 is configured to detect the displacement of the tape edge in the width direction with high accuracy. ing. 16 is its controller, 17 is an amplifier for amplifying the displacement sensor output to an appropriate voltage value, 18 is a converter for converting its input value and output value to desired values in accordance with the driving characteristics of the piezoelectric element, and 19 is this converter. A switch for short-circuiting the input terminal of the converter, and 20 is a piezoelectric element driver for driving the piezoelectric element 13.
[0011]
The outer conductor for leaking radio waves from the coaxial cable is required to be provided with cuts (slots) at a constant pitch and at a predetermined inclination accurately. To that end, the position in the width direction of the tape in the processed portion is accurately determined. Must be done. Downstream from the fixed roller 3, the tape feeding direction is determined to be constant, and there is a slot punching portion in that portion. Since the feed direction is fixed downstream of the fixed roller 3, if the width direction position of the tape is accurately determined at this fixed roller portion, an accurate position in the width direction of the tape in the processing section is secured. .
[0012]
The tape edge position adjusting device according to the present embodiment is configured as described above. First, a target position in the tape width direction is determined by using a portion of the fixed roller 3 (or a downstream position thereof) as a target position setting unit. If the tape is conveyed to this target position, accurate slot punching can be performed in the processing section. Next, the switch 19 is turned on, that is, the output from the amplifier 17 is set to zero, and at this time, the piezoelectric element driver 20 is set at the center of the stroke of the piezoelectric element. In this state, the direction of the adjusting roller 4 is manually adjusted so that the tape 1 comes to the target position. When the conveyance to the target position is secured, the sensor is positioned so that the tape edge is located at the zero point at the center of the displacement sensor. This means that when the position of the tape 1 fed from the roll 1a at the sensor section is at the zero point position, the swing angle of the adjusting roller for conveying the tape to the target position is set. The switch 19 is turned off. The above is the initial setting. The displacement sensor detects a positive deviation when the edge shifts to the left in the tape transport direction in FIG. 1 with respect to the initial setting position, and detects a negative deviation when the edge shifts to the right in FIG. I do.
[0013]
The edge position adjusting mechanism of the present invention changes the axis angle of the adjusting roller 4 with respect to the axis in the tape conveying direction in accordance with the amount of deviation of the tape in the width direction detected by the laser displacement sensor 15, so that the conveying tape Is finely adjusted so that the tape comes to the target position. Therefore, when the edge position of the tape at the displacement sensor position is deviated from the zero point, the angle of the adjusting roller is appropriately changed according to the deviation amount, and the tape to be conveyed is moved to the target position. Need to be designed to come That is, the distance between the adjustment roller 4 and the downstream target position, the amount of electrical conversion between the detection signal (deviation output) value of the displacement sensor and the output value of the piezoelectric element driver, and the amount of displacement of the piezoelectric element and the adjustment roller Since it is determined by the amount of mechanical conversion with the swing angle, it can be realized in principle by appropriately setting these three members in design. The conversion characteristics of the entire adjustment system from the output of the displacement sensor to the swinging displacement of the adjustment roller may not operate correctly as designed because errors of individual components may be involved. It can be relatively easily handled by comprehensively adjusting the characteristics in the section.
[0014]
As described above, one embodiment of the tape edge position adjusting device of the present invention has been described. However, the present invention is not limited to the above embodiment, and various design changes are possible. For example, in the above embodiment, the adjusting roller is provided stepwise between the two fixed rollers. However, the adjusting roller is not necessarily provided between the two fixed rollers, but is provided stepwise downstream of one fixed roller. Alternatively, the tape to be conveyed may be brought into pressure contact with the surface of the adjusting roller, and the feed in the tape width direction may be adjusted by changing the angle of the central axis of the adjusting roller. Also, in some cases, without providing a lever-based amplification mechanism separately, by selecting the position of the rotation axis of the base supporting the adjustment roller in accordance with the amplification factor, the base can be connected to the lever of the amplification mechanism. It is also possible to configure so that the pedestal of the adjustment roller is directly pressed by the piezoelectric element. The present invention is not necessarily limited to the tape for the outer conductor of the leaky coaxial cable, but is applicable to the edge position adjusting device in the lamination film or other tape conveyance.
[0015]
【Example】
1 shows one embodiment of the present invention.
In this embodiment, a laser displacement sensor 15 having a detection range of 35 mm is employed as the displacement sensor. This displacement sensor uses a controller that performs a light emitting and receiving operation of a laser beam by the controller 16 and outputs the received deviation information as an analog voltage value of ± 7 V with linear characteristics for ± 7 mm at the zero point position via the controller 16. . The output characteristics of this displacement sensor are shown in FIG.
[0016]
The amplifier 17 amplifies an input value of ± 1 V to ± 10 V and outputs the amplified value. The piezoelectric element 13 has a characteristic of expanding and contracting in a range of about 0 to 100 μm when a signal of 0 to 600 V is received from the driver 20, and the driver 20 converts a signal of 0 to 5 V into a signal of 0 to 600 V. Is added to the piezoelectric element 13 after being amplified. The drive characteristic of the piezoelectric element 13 is shown in FIG. 2B, and takes an intermediate position of the stroke at 300 V. As the converter 18 for converting the amount of deviation detected from the displacement sensor 15 and outputting the detected deviation to the driver for driving the piezoelectric element, a converter for converting a signal of ± 10 V into an analog voltage value of 0 to 5 V is used. The characteristics are shown in FIG. In addition, the mechanical amplification mechanism amplifies the displacement amount of 0 to 100 μm to 10 to 1000 μm, which is ten times, and drives the adjustment roller for displacement.
[0017]
In the above embodiment, when the tape is displaced by 0.5 mm in the (+) direction due to the turbulence of the roll, the following operation is performed to adjust the deviation in the tape width direction.
1) The laser type displacement sensor outputs + 0.5V.
2) The amplifier 17 amplifies the input of + 0.5V to + 5V and outputs it.
3) The converter 11 receiving the input of +5 V converts it to 3.75 V and outputs it to the driver.
4) The driver converts 3.75V to 450V and amplifies to drive the piezoelectric element.
5) The piezoelectric element receiving this drive voltage extends in the direction of 25 μm (+) from the center position.
6) In the mechanical amplifying mechanism, the extension of the piezoelectric element is applied to one operating point of the lever, and the other operating point is displaced by 250 μm in the (−) direction to change the angle of the adjusting roller.
7) The moving direction of the tape changes depending on the angle of the roller, and the tape is adjusted so as to come to the target position.
[0018]
【The invention's effect】
According to the tape edge position adjusting device of the present invention, the tape position can be automatically and appropriately adjusted in response to a change in the tape position during conveyance. Tape feed. Therefore, by applying the device of the present invention to the slot processing step of the tape for the leaky coaxial cable external conductor, the tape position can be properly adjusted by always responding to the tape position fluctuation during the processing step. An external conductor tape with high slot processing accuracy can be manufactured with high yield, thereby contributing to the supply of a coaxial cable in which the leakage band of radio waves is accurate and stable.
[0019]
In addition, since the present invention employs a mechanical amplification mechanism using a piezoelectric element, a servo motor, a speed reducer, a gear, a ball screw mechanism, and the like, such as a servo control mechanism often used for this type of displacement adjustment mechanism, are required. The small angle adjustment can be easily and accurately performed by a simple and compact mechanism, and the space can be saved. In addition, since the displacement of the piezoelectric element is close to the displacement corresponding to the adjustment angle of the roller, the tape displacement can be converted to the displacement of the piezoelectric element with linear characteristics, which is a complicated conversion characteristic similar to servo control. The software cost is not required, and the equipment cost can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a basic configuration of the present invention.
2A is a characteristic diagram of a displacement sensor used in an embodiment of the present invention, FIG. 2B is a driving characteristic diagram of a piezoelectric element used in the embodiment of the present invention, and FIG. It is a characteristic view of the signal converter used for the Example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 External conductor tape 1a Tape roll 2, 3 Fixed roller 4 Adjustment roller 5 Base part 6 Spring 7 Amplifying mechanism 8 Lever 9 axis 13 Piezoelectric element 15 Laser displacement sensor 16 Controller 17 Amplifier 18 Converter 19 Switch 20 Piezoelectric element driver

Claims (2)

A displacement sensor that detects displacement of the tape edge in the tape width direction in the tape conveyance path, and an adjustment roller that can displace the roller axis angle with respect to the tape conveyance direction on the downstream side thereof are provided. The width direction position of the tape is adjusted by displacing the axis angle of the adjusting roller according to the deviation amount of the tape edge, and the displacement of the axis angle of the adjusting roller is determined by the displacement sensor. A voltage value corresponding to the deviation amount of the tape edge is given to the piezoelectric element by the detection output, and the adjustment roller is oscillated by the output of the piezoelectric element via a lever type amplifying mechanism. Tape edge position adjustment device. The tape is a tape edge position adjusting apparatus according to claim 1, wherein the outer conductor tape leaky coaxial cable.

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