JPH11273189A - Tape travel controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a processing time for rewinding a tape like recording medium by comparing loaded tape tension with optimum tape tension and setting a driving motor in drivable with optimum torque. SOLUTION: Whether or not the tape tension loaded to a magnetic tape based on a detection signal from a detection circuit part 11 is the optimum tape tension is compared with a reference value, and when it is different from the optimum value, a torque control value according to take-up torque imparted to a reel take-up motor 14 is set. A motor driver control circuit 13 converts again a control signal from a control value setting part 12 to the torque control value, and drives the reel take-up motor 14 prescribed take-up torque according to the converted torque control value. Thus, when the magnetic tape 2 is taken up to be rotation driven, the magnetic tape 2 is controlled so as to be rotation driven with the prescribed take-up torque, and the tape tension optimum for the magnetic tape 2 is loaded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a recording and / or reproducing apparatus such as a tape recorder, a video tape recorder, etc., in which a tape-shaped recording medium is run with a predetermined tape tension and wound up. The present invention relates to a tape running control device.

[0002]

2. Description of the Related Art In a recording and / or reproducing apparatus such as an audio tape recorder and a video tape recorder, when reproducing information recorded in advance on a magnetic tape or recording information on a magnetic tape, a magnetic tape is moved to a tape running position. A loading operation for pulling out the tape from the supply reel and an unloading operation for winding the magnetic tape pulled out to the tape running position onto the take-up reel are performed. The recording and / or reproducing apparatus may damage the magnetic tape by, for example, hooking the slack magnetic tape during the above-mentioned unloading operation when the traveling driven magnetic tape is not maintained at the optimum tape tension. May give.

In a tape cassette or the like in which a magnetic tape is wound on a reel in advance and stored in a housing, the magnetic tape is mounted on a recording and / or reproducing apparatus in a state where the magnetic tape is loosened, and a loading operation of the magnetic tape is performed. Is performed, the magnetic tape may be damaged by, for example, hooking the magnetic tape on a loading mechanism or another mechanism.

Further, in a tape cassette or the like, if the magnetic tape is not wound around a reel with a certain optimum tape tension, the portion wound around the reel may be loosened or misaligned. If the tape cassette or the like is left loose or displaced in the wound portion, the magnetic tape is damaged.

Therefore, in a recording and / or reproducing apparatus, it is necessary to set an optimum tape tension and wind the magnetic tape so that the magnetic tape is run or wound without slack. For this reason, the recording and / or reproducing apparatus is configured to take up the magnetic tape sent from the supply reel at a constant speed from the motor drive circuit unit to the drive motor for driving the take-up reel to rotate. By applying the torque, the above-described damage to the magnetic tape caused by the slack of the magnetic tape is prevented by securing the optimum tape tension.

Conventionally, a recording and / or reproducing apparatus has detected the reel diameter of a take-up reel including a portion of a wound magnetic tape in order to apply an optimum tape tension to the magnetic tape. . That is, the detection of the reel diameter is performed by rotating the magnetic tape until the fixed rotation speed of one of the supply reel and the take-up reel is completed, and a rotation detection mechanism attached to the tape supply motor that drives the supply reel. And the rotation speed information obtained from the rotation speed information from the rotation detection mechanism attached to the mechanism operating in synchronization with the take-up reel. The recording and / or reproducing apparatus determines a winding torque to be given to the tape winding motor that drives the winding side reel from the reel diameter of the winding side reel calculated as described above, and determines the winding torque. By applying torque to the tape winding motor from the motor drive circuit and controlling the torque, an optimum tape tension of the magnetic tape is secured and the magnetic tape is wound.

[0007]

As described above, in a conventional recording and / or reproducing apparatus, in order to secure an optimum tape tension and wind a magnetic tape on a winding reel in a good state, Running a magnetic tape was a necessary condition. Therefore, conventional recording and / or
Or, in the reproducing device, when the magnetic tape has not transitioned to the running state, after shifting to the running state, it is necessary to allow the magnetic tape to travel for a while, and then it is possible to secure the tape tension in an optimal state. Did not. For this reason,
In the conventional recording and / or reproducing apparatus, it takes time to wind the magnetic tape while securing the optimum tape tension.

Further, in the conventional recording and / or reproducing apparatus, when the magnetic tape cannot be shifted to the running state, that is, for example, before the magnetic tape is changed to the running state, a command to wind and discharge the magnetic tape is issued. When given by the user, or when an abnormal situation occurs such that the magnetic tape cannot shift to the running state for some reason,
When the magnetic tape is stuck to a part of the running mechanism due to moisture or the like and cannot be run, the reel diameter cannot be detected by running the magnetic tape. Winding could not be performed.

In view of the above, according to the present invention, winding is performed without setting the running of the tape-shaped recording medium and irrespective of the reel diameter of the winding-side reel so that the optimum tape tension is set. It has been proposed for the purpose of providing a tape running control device.

[0010]

A tape running control device according to the present invention which achieves the above object has a mechanical position which is arranged in a tape running system and whose mechanical position is changed according to a tape tension applied to a tape-shaped recording medium. A tape tension detecting unit including a detecting means for displacing, a detecting sensor for detecting a mechanical displacement amount of the detecting means, and converting the mechanical displacement amount of the detecting means detected by the detecting sensor into an electric detection signal. A detection circuit for outputting, and a torque control value to be given to a drive motor for driving a tape reel for winding the tape-shaped recording medium based on the detection signal output from the detection circuit, and the torque control value is set to a control signal. A control value setting unit that converts the control signal into a torque control value and outputs a torque corresponding to the torque control value. Constituted by a torque controller comprising a motor driver control circuit for controlling the driving motor gives to the drive motor.

According to the tape running control device of the present invention having the above-described configuration, the tape tension applied to the tape-shaped recording medium is detected by the tape tension detecting unit, and the tape tension and the optimal tape tension are determined by the torque. A comparison is made in the control unit, and a setting is made so that the driving motor for driving the tape reel is driven by the optimum torque. Therefore, in the tape control device according to the present invention, an optimum tape tension is set and the tape-shaped recording medium is wound around the tape reel without requiring the tape to run, thereby reducing the processing time. Further, the tape control device according to the present invention enables the tape to be wound in a good state without damaging the tape-shaped recording medium even when it is impossible to shift to the tape running state. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a tape running control device according to the present invention will be described in detail with reference to the drawings. The tape traveling control device 1 according to the present embodiment is mounted on a tape recorder that reproduces information recorded on a magnetic tape or records information on a magnetic tape. In a tape recorder, a supply reel that sends out a magnetic tape and a winding reel that winds up the sent magnetic tape are driven by a driving motor, and the winding reel can directly apply a winding torque. It is configured to be driven by a torque control type reel winding motor. The tape recorder has a tape cassette in which a supply reel on which a magnetic tape or the like is wound and a winding reel on which the magnetic tape sent from the supply reel is wound are housed in a cassette case. Is done.

As shown in FIG. 1, the tape traveling control device 1 is provided near a take-up reel 3 that takes up a magnetic tape 2 sent from a supply reel (not shown). The tape running control device 1 includes a tape tension detection unit 4 and a torque control unit 5.

The tape tension detecting section 4 includes a detecting arm 6 and a detecting sensor 7. One end of the detection arm 6 is cantilevered by a support section 8 provided on a frame (not shown), and the other end supports a guide roll 9 for detection that travels with the magnetic tape 2 hung thereon. The detection arm 6 is urged in a direction indicated by an arrow A in FIG. 1 by a tape tension applied to the magnetic tape 2 traveling while being hung on a detection guide roll 9 constituting a tape traveling system. One end of the detection arm 6 is connected to the tape recorder, and the other end of the balance spring 10 for urging the detection arm 6 in the direction of arrow B in FIG. 1 is connected. The detection arm 6 rotates in the directions of arrows A and B about the support portion 8 as a fulcrum due to the difference between the tape tension applied to the magnetic tape 2 running on the detection guide roll 9 and the elastic force of the balance spring 10. It has a possible structure.

The detection sensor 7 includes, for example, a magnetic sensor including a magnet and a Hall element, an optical sensor including a light emitting element and a light receiving element, and the like. In the detection sensor 7, one detector 7a is provided on the detection arm 6 side, and the other detector 7b is arranged to face the same. The detection sensor 7 detects a mechanical displacement amount of the detection arm 6 that rotates about the support portion 8 and sends out a detection output.

The torque control section 5 includes a detection circuit section 11, a control value setting section 12, and a motor driver control circuit 13. The detection circuit 11 converts the mechanical displacement of the detection arm 6 detected and output from the detection sensor 7 into an electrical detection signal. The detection circuit section 11 outputs a detection signal to the control value setting section 12.

The control value setting unit 12 is constituted by a microcomputer, and determines whether or not the tape tension applied to the magnetic tape 2 based on the detection signal output from the detection circuit unit 11 is the optimum tape tension. Judge by comparing with. The control value setting unit 12 controls the magnetic tape 2
If it is determined that the tape tension is different from the optimum tape tension, a torque control value corresponding to the winding torque applied to the reel winding motor 14 is set. The control value setting unit 12 converts the set torque control value into an electric control signal and outputs the electric control signal to the motor driver control circuit 13.

The motor driver control circuit 13 converts the control signal output from the control value setting section 12 into a torque control value again. The motor driver control circuit 13 gives a predetermined winding torque to the reel winding motor 14 according to the converted torque control value. Therefore, the reel winding motor 14
Is controlled to be driven to rotate with a predetermined winding torque when the winding operation of the magnetic tape 2 is performed and an optimum tape tension is applied to the magnetic tape 2. .

As shown in the flowchart of FIG. 2, the tape running control device 1 sets a winding torque for applying an optimum tape tension to the magnetic tape 2 and drives the reel winding motor 14 to drive the magnetic tape 2. To take up.

In step 1, when the tape cassette is loaded into the tape recorder, the control value setting section 12 initializes the torque control value that gives the weakest winding torque. Control value setting unit 12
Converts the initially set torque control value into a control signal and outputs it to the motor driver control circuit 13. The motor driver control circuit 13 converts a control signal from the control value setting unit 12 into a torque control value, and applies a winding torque according to the torque control value to the reel winding motor 14. When the winding torque is applied in step 2, the reel winding motor 14 drives the winding reel 3 so that the winding reel 3 starts winding the magnetic tape 2.

In step 3, the magnetic tape 2
When a take-up torque is applied to the reel take-up motor 14 and the take-up by the take-up reel 3 is started, the applied take-up torque and the winding of the magnetic tape 2 taken up by the take-up reel 3 are performed. A tape tension corresponding to the diameter is applied. 1 is applied to the detection arm 6 by the tape tension applied to the magnetic tape 2 running on the detection guide roll 9 supported at the other end.

The detection arm 6 rotates in the direction of arrow B when the force urged by the tape tension is weaker than the force of the balance spring 10 that urges the detection arm 6 in the direction of arrow B in FIG. And the position is displaced.

When the mechanical position of the detecting arm 6 is displaced, the detecting element 7a provided on the detecting arm 6 is rotated in synchronization with the detecting arm 6 and displaced. The detection sensor 7 detects and outputs the amount of mechanical displacement of the detection arm 6 when the detector 7b senses the movement of the detector 7a. The detection circuit unit 11 converts the mechanical displacement amount of the detection arm 6 detected and output by the detection sensor 7 into an electrical detection signal and outputs the signal to the control value setting unit 12.

The control value setting section 12 detects the tape tension applied to the magnetic tape 2 based on the detection signal from the detection circuit section 11 in step 4. If the control value setting unit 12 determines in step 5 that the detected tape tension does not satisfy the predetermined value, the control value setting unit 12 sets the torque control value so that the winding torque applied to the reel winding motor 14 increases. It is changed and converted into a control signal. The control value setting unit 12 outputs the converted control signal to the motor driver control circuit 13 again.

If the control value setting unit 12 determines in step 6 that the detected tape tension satisfies the predetermined value, the control value setting unit 12 stops changing the torque control value and sets the torque control value at that time. Hold the value.

In step 7, the winding of the tape tension disc loaded with the winding torque corresponding to the torque control value held in the control value setting unit 12 is continued in step 7.

When the control value setting unit 12 determines that the detected tape tension does not satisfy the predetermined value as described above, the tape traveling control device 1
The operations of steps 2 to 5 described above are repeatedly performed until the control value setting unit 12 determines that the predetermined value is satisfied.

In the present invention, the tape recorder described in the above embodiment is not limited to a recording and / or reproducing apparatus, and a tape-shaped recording medium such as a magnetic tape including a video tape recorder may be wound. It is sufficient that the reel winding motor that drives the winding reel to be taken is a torque control type. Further, the present invention is also applied to, for example, a dedicated rewinding machine for rewinding a reproduced tape cassette or the like at high speed.

[0029]

According to the tape running control device of the present invention, the torque for securing the optimum tape tension is set without running the tape-shaped recording medium and regardless of the diameter of the tape reel. In addition, the processing time for winding the tape-shaped recording medium can be reduced.

Further, according to the tape running control device of the present invention, the tape-shaped recording medium can be wound with the optimum tape tension even if the tape-shaped recording medium cannot be run for some reason. In addition, winding can be performed without damaging the tape-shaped recording medium.

[Brief description of the drawings]

FIG. 1 is a structural diagram of a tape running control device mounted on a tape recorder.

FIG. 2 is a flowchart showing the operation of each mechanism when optimizing a tape tension by a tape traveling control device.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 tape running control device, 2 magnetic tape (tape recording medium), 3 take-up reel, 4 tape tension detection unit, 5 torque control unit, 6 detection arm (detection means), 7 detection sensor, 7a, 7b detector , 11 detection circuit section, 12 control value setting section, 13 motor driver control circuit, 14 reel winding motor (drive motor)

Claims (2)

[Claims] 1. A detecting means which is arranged in a tape running system and whose mechanical position is displaced in accordance with a tape tension applied to a tape-shaped recording medium, and a detecting sensor which detects a mechanical displacement amount of the detecting means. A tape tension detection unit provided, a detection circuit unit that converts a mechanical displacement amount of a detection unit detected by the detection sensor into an electrical detection signal and outputs the signal.
A torque control value to be applied to a drive motor for driving a tape reel for winding the tape-shaped recording medium is set based on a detection signal output from the detection circuit unit, and the torque control value is converted into a control signal and output. A control value setting unit that controls the driving motor by converting a control signal output from the control value setting unit into a torque control value and applying a torque corresponding to the torque control value to the driving motor. And a torque control unit comprising a driver control circuit, wherein the winding is performed with a torque that optimizes the tape tension without running the tape-shaped recording medium. 2. The control value setting section sets a torque control value so that the drive motor is driven with the weakest torque when winding of the tape-shaped recording medium is started. The tape running control device according to claim 1, wherein: