JPH03268260A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a head from clogging with the beginning and end parts of a magnetic tape and to eject the tape in the case of abnormality by detecting a rotating amt. of a reel motor for a 1st reel on the side of drawing out the magnetic tape at the tape loading time and deciding the state of the magnetic tape. CONSTITUTION:When a tape loading command is issued, guide members 19 and 20 are moved by a control signal of a microcomputer 14 from a tape unloading completion position 21a toward a tape loading completion position 21b as shown by an alternate long and two short dashes line, and the magnetic tape 1 is drawn out of a supply reel 2. In this case, a take-up reel 3 is fixed not to be rotated. A rotating amt. of the supply reel 2 is detected by a reel motor rotation sensor 6 and a rotation detector 8, and this detected rotation information (n) is sent to the microcomputer 14, where it is compared with a min. rotating amt. (n0) of the supply reel 2 at the normal tape loading time, and if (n) < (n0), abnormality is decided, and a tape cassette 25 is ejected out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary head type magnetic recording/reproducing device using a tape cassette.

[Conventional technology]

Conventional technology, as described in Japanese Utility Model Application Publication No. 63-135537, detects the position of a tape loading member and changes the rotational speed of the head drum according to the detected position to reduce damage to the tape. It had become.

[Problem to be solved by the invention]

The above conventional technology detects only the position of the tape loading member, and does not take into account the state of the tape at the time of loading.

For example, if an abnormal tape cassette is inserted, such as a tape cassette with a cut tape or a 1-luc cassette without a magnetic tape section for measuring the torque of the reel motor, it is difficult to identify this. Can not.

On the other hand, even if a normal tape cassette is rope-inked, for example, if tape loading is performed at the beginning of the tape cassette, the beginning of the tape will be attached to the magnetic spatula I.
approach ~. If the magnetic recording/reproducing apparatus is operated in this state, the beginning of the tape may come into contact with the magnetic head, causing the head to become clogged.

An object of the present invention is to determine the state of the magnetic tape during loading and at the end of loading, to prevent head clogging caused by the beginning and end of the magnetic tape, and to
It is an object of the present invention to provide a magnetic recording and reproducing device that determines and ejects an abnormal tape cassette when it is inserted.

[Means to solve the problem]

In order to achieve the above object, the present invention detects the amount of rotation of the reel motor of the first reel on the side that pulls out the magnetic tape during tape loading, and determines whether this amount of rotation is greater than or equal to a predetermined value. Provide the first means to do so.

Further, in the present invention, when the start or end of the magnetic tape is detected upon completion of tape loading, the magnetic tape is moved in the opposite direction to the detected end, the time for the tape end to move is detected, and the moving time is A second means for determining whether the value is equal to or greater than a predetermined value is provided.

[Effect]

When a 1-lux cassette for measuring the torque of the reel motor is inserted, it is identified as a normal tape by the first means and is removed.

Further, when a tape cassette with cut tape is inserted, the tape is wound up by the first reel during tape loading, and becomes the end of the tape when loading is completed. Therefore, by the second means, it is identified that the tape is cut and the tape cassette is removed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a magnetic recording/reproducing apparatus according to the present invention, in which 1 is a magnetic tape, 2 is a supply reel, 3 is a take-up reel, 4 and 5 are reel motors, and 6 and 7 are reel motors.
is the reel motor rotation sensor, 8.9 is the rotation detector, 10
, 11 is a tape end detection sensor, 12 is a tape start end detector, 13 is a tape end detector, 14 is a microcomputer, 15° 16 is a reel motor drive means, 17.18 is a D/A (digital/analog) ) converter, 19.20 is a guide member, 21a is a tape unloading completion position, 21b is a tape loading completion position, 22 is a rotating cylinder, 23 is a mode opening means, 2
4 is a mode position detection means, and 25 is a tape cassette.

In the figure, a tape cassette 25 includes a supply reel 2 and a take-up reel 3, and the magnetic tape 1 is stored stretched between them. Such tape cassette 2
5 is inserted from a cassette insertion port (not shown) and installed at a predetermined position, the guide member 19.20 is inserted into the opening provided in the tape cassette 25 at the tape unropping ink completion position 21a shown by the - dotted chain line. It is located further back than the magnetic tape 1.

In this state, when a tape loading command is issued, the microcomputer 14 sends a control signal to the mode drive means 23 to drive a mode drive gear (not shown).

Due to the operation of this mode drive gear, the guide member 19°2
0 moves from the tape unloading completion position 21a to the tape loading completion position 2/lb indicated by the two-dot chain line 5, and along with this movement, the magnetic tape 1 is hooked and pulled out from the tape cassette 25.

At this time, the take-up reel 3 is fixed so as not to rotate by means not shown, and the supply reel 2 is fixed to the microcomputer 14.
D/A converter 18. Reel driving means 15 is adapted to apply tape tension to the magnetic tape 1 by a reel motor 4. tape tension.

This is a force that prevents the magnetic tape 1 from loosening, and the magnetic tape 1 is guided by the guide members 19 and 20 into the tape cassette 25.
It does not prevent you from being drawn from.

Therefore, the magnetic tape 1 is pulled out from the supply reel 2.

The amount of rotation of the supply reel 2 is detected by a reel motor rotation sensor 6 and a rotation detector 8 installed on the supply reel motor 4, and this detected rotation information n is sent to the microcomputer 14.

While tape loading is being performed, the mode position detector 24 detects the rotation of the mode driving means that corresponds one-to-one to the position of the guide member 19, 20, and this detected position information is sent to the microcomputer 14. .

In this way, the microcomputer 14 constantly monitors the position of the guide members 19, 20.

Guide members 19 and 20 are at tape loading completion position 2
1b, the microcomputer 14 activates the mode driving means 23.
stop rotating.

At this time, for example, if tape loading is performed at the beginning of winding of the magnetic tape 1, the tape starting end of the magnetic tape 1 pulled out by the guide members 19 and 20 approaches the rotating cylinder 22. Normally, the tape starting end (and ending end) of the magnetic tape 7...8. If it comes into contact with a magnetic head (not shown) that is covered with a magnetic head, the head is likely to become clogged. Therefore, the tape end detection sensor 10,
When the tape starting edge detector 12 detects the tape starting edge, the tape starting edge detection information is sent to the microcomputer 14. A signal is sent from the D/A converter 17 to the reel motor drive means 16 by the microcomputer 14, and the take-up reel motor 5 is driven. The magnetic tape 1 is wound onto the take-up reel 3, and the tape starting end is separated from the rotating cylinder 22 to prevent clogging of the magnetic head, etc. At this time, the rotation detected by the rotation sensor 7 and rotation detector 9 The detection signal N is sent to the microcomputer 14. The maximum rotation amount at which the tape starting end of a normal tape is wound onto the take-up reel 3 is N. Then, the microcomputer 14 outputs the rotation detection signal N and the maximum rotation amount N. Compare with. A similar operation is performed even when the end of the tape is pulled out at the end of the tape winding.

) The tape loading is thus completed, and at this time, the magnetic tape 1 comes into contact with the rotary cylinder 22 over a predetermined angle, thereby forming a predetermined tape running path.

The determination operation of the microcomputer 14 for detecting an abnormality in the inserted tape cassette and ejecting the tape cassette in this loading operation will be explained with reference to FIG.

The microcomputer 14 detects detected rotation information n of the supply reel 2 while the magnetic tape 1 is drawn out by the guide members 19 and 20, and determines the minimum rotation amount n of the supply reel 2 during normal tape loading.

(step 201). n (in the case of no,
The inserted tape cassette is determined to be a special tape cassette in which the reel does not rotate, such as a torque cassette for torque measurement without a magnetic tape section, and the tape cassette is ejected (step 202).

Furthermore, if the magnetic tape section is cut, the magnetic tape 1 will not be pulled out by the kite members 19, 20. Since tape tension is applied to the supply reel 2 under control from the microcomputer 14, the cut tape is wound onto the supply reel 2 in this case.

(Therefore, it cannot be determined in step 201.) When the movement of the guide members 1, 9, and 20 is completed, the microcomputer 1
4 reads the detection signal from the tape end detector 10.11 (step 203). If the magnetic tape section is cut, the magnetic tape 1 is wound onto the supply reel 2, so the microcomputer 14 determines that the end of the tape has been detected, and the reel motor is driven from the D/A converter 18. A signal is sent to the means 15 to drive the supply reel motor 4 to wind the magnetic tape 1 onto the supply reel 2 (step 204).
. At this time, the detected rotation amount N of the supply reel 2 is determined by the microcomputer 14.
sent to. When the magnetic tape section is cut, the tape end detection signal is continuously detected, and the maximum rotation amount N is reached for a normal tape (the end of the tape is wound by the supply reel 2). On the other hand, if N>No, the microcomputer 14 determines that the magnetic tape portion of the inserted tape cassette 25 has been cut, and ejects the tape cassette 25 (step 205).

In step 205, in addition to the amount of rotation of the supply reel 2, the tape end movement time t is detected, and the tape end maximum movement time is also detected. The same effect can be obtained by comparing (1) 1o or not).

〔Effect of the invention〕

According to the present invention, it is determined whether the inserted tape cassette is normal or not, and if the tape cassette is abnormal, it is ejected. can be detected.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a magnetic recording/reproducing apparatus according to the present invention, and FIG. 2 is a flowchart showing the operation of the apparatus shown in FIG. DESCRIPTION OF SYMBOLS 1... Magnetic tape, 2... Supply reel, 3... Take-up reel, 4.5... Reel motor, 6.7... Rotation sensor, 8.9... Rotation detector, 11 tons 10, 11... Tape end sensor, 12, 13... Tape end detector, 14... Microcomputer, 15.1.6. ...Reel driving means, 19, 20... Guide member, 21a... Tape unloading completion position, 21b
... Tape loading completion position, 22 ... Rotating cylinder, 23 ... Mode drive means, 24 ... Mode position detector, 25 ... Tape cassette.・12・tsu

Claims (1)

[Claims] 1. When moving a guide member from a tape unloading completion position to a tape loading completion position, and pulling out a magnetic tape from an inserted tape cassette as the guide member moves, A tape in which one reel is rotatable by moving the guide member while applying tape tension, a second reel is fixed, and the magnetic tape is brought into contact with a rotating cylinder equipped with a magnetic head over a predetermined angle. a loading operation; moving the guide member from the tape loading completion position to the tape unloading completion position;
The first reel is rotated as the guide member moves, the magnetic tape is wound on the first reel, and the magnetic tape pulled out by the tape loading operation is stored in the tape cassette. Equipped with a tape loading mechanism that performs a tape unloading operation, a tape end detection means that detects the beginning and end of the tape, and a mechanism that embodies various states such as recording/playback, fast forwarding, rewinding, and stopping of the tape. In the magnetic recording and reproducing apparatus, a first means is provided for detecting the amount of rotation of the first reel during tape loading and determining whether or not the amount of rotation is greater than or equal to a predetermined value, and the first means A magnetic recording/reproducing apparatus characterized in that the tape cassette is ejected upon determining that the amount of rotation is not greater than a predetermined value. 2. In claim 1, upon completion of tape loading,
The tape starting end is detected by the tape end detection means. Alternatively, a magnetic recording/reproducing device is provided with a mechanism that moves the tape in the direction opposite to the detected tape end when the end is detected. 3. In claim 1 or 2, when the tape starting end or the tape ending end is detected by the tape detecting means, the tape is moved in a direction opposite to the detected tape end, and the time for the tape end to move is detected; A magnetic recording and reproducing apparatus that includes second means for determining whether the travel time is greater than or equal to a predetermined value, and ejects the tape cassette upon determination by the first means that the travel time is greater than or equal to the predetermined value.