JP2943228B2 - Tape recording and playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recording / reproducing apparatus which performs operations such as recording or reproduction by loading a tape from a mounted tape cassette.

[Summary of the Invention] A tape recording / reproducing apparatus according to the present invention provides a tape recording / reproducing apparatus for recording, reproducing, variable-speed reproduction, fast-forwarding, rewinding, and the like when a reel rotation is not detected in a mode in which the tape should travel (hereinafter referred to as a tape traveling mode). It is determined that a tape running abnormality has occurred, the abnormality occurrence information is stored, and when unloading is performed after the running abnormality has occurred, the tape winding torque should be increased above normal to perform the unloading operation. Accordingly, it is possible to prevent a tape winding failure during the unloading operation.

2. Description of the Related Art In a video recording / reproducing apparatus (VTR), digital audio tape (DAT) player, or the like, when performing a recording or reproducing operation, a tape is pulled out from a mounted tape cassette, and a predetermined tape is attached to a rotating head drum, for example. An angle winding operation, so-called loading, is performed.

FIG. 4 shows an example of the loading state. As shown in the drawing, a loading guide roller for moving a guide groove 2 from a tape cassette C mounted on a cassette deck portion 1.
The tape T is pulled out by 3a and 3b, and the head drum 4
And the pinch roller 6 is pressed against the capstan shaft 5 with the tape T interposed therebetween, so that the tape can be run. When pulling out the tape T, for example, the T reel 7 is locked so as not to rotate, and the tape T is pulled out only from the S reel 8.

It is well known that in such a loading state, the rotational scanning of the head drum 4 and the running of the tape T are performed to execute a recording or reproducing operation or the like.

When the loaded tape cassette C is to be taken out (ejected) from the cassette deck 1, the unloaded tape T is first stored in the tape cassette C. That is, the loading mechanism such as the guide rollers 3a and 3b performs the reverse operation of the loading operation, the T reel 7 is locked, and the winding operation by the S reel 8 is performed.

In this way, by specifying the same reel for non-rotatably locking and the reel for drawing and winding during loading and unloading, fluctuations in the tape position due to loading can be prevented. .

[Problems to be Solved by the Invention] By the way, even when such an unloading operation is performed, the tape T may not be completely stored in the tape cassette C in some cases. That is, the tape T must be completely loaded from the loading position shown by the solid line in FIG. 5 (a) to the tape cassette C as shown by the dotted line by the unloading operation. Even if the operation of the loading mechanism such as the guide rollers 3a and 3b has been completed, only the tape T may not be contained in the tape cassette C as shown in FIG. If the ejecting operation is performed in such an unloading failure state, the lid (lid) R on the front surface of the tape cassette C is closed with the ejecting operation, so that as shown in FIG.
There is a problem that the tape T is pinched by the lid R and the tape T is damaged.

[Means for Solving the Problems] The present invention has been made in view of such problems, and has as its object to prevent occurrence of a tape winding failure during unloading.

For this reason, for example, a rotation detector that can detect the rotation operation of the reel by a frequency generator (FG) that outputs a rotation detection signal of a predetermined frequency with the rotation of the reel,
In the tape running mode, when the reel rotation operation is not detected, an error detecting unit that determines that a tape running abnormality has occurred, a storage unit that stores the tape running abnormality occurrence information when it is obtained, and a storage unit when unloading starts. Investigation means for retrieving whether or not abnormality occurrence information is stored, and when abnormality occurrence information is detected by the investigation means, unloading operation is performed by increasing the tape winding torque above a normal level. And an operation control means for controlling the tape recording and reproducing apparatus.

[Operation] In most cases, the unloading abnormality, that is, the tape winding failure occurs, is caused by the rotation error of the reel during the unloading. By the way, assuming that the reel drive circuit and the drive mechanism are normal, the rotational operation failure of the reel occurs when uneven winding of the tape, mounting of a heavy cassette, or foreign matter catching on the reel occurs. It is. Then, when there is an obstacle to such a reel rotation operation,
A running defect occurs before the unloading operation, that is, in a tape running mode such as reproduction or fast forward.

In other words, conversely, in a case where an appropriate reel rotation operation is not performed in the tape running mode, it can be predicted that if the unloading is performed after the end of the running operation, a tape winding failure will occur. .

Embodiment FIG. 1 shows an embodiment of a loading and reel drive system circuit block of a tape recording / reproducing apparatus according to the present invention.

Reference numeral 10 denotes a drive system controller (hereinafter, simply referred to as a controller), which is configured by a microcomputer including a CPU, a ROM, a RAM, and an interface unit. The controller 10 controls tape running (reel drive), loading and unloading operations based on control information from a main controller 30 of the present tape recording / reproducing apparatus.

Reference numeral 11 denotes a T reel motor drive circuit, and reference numeral 12 denotes an S reel motor drive circuit, which drives the respective reel motors 11a and 12a to execute the tape running. Also,
A loading mechanism drive circuit 13 drives the guide rollers 3a and 3b, the pinch roller 5, and the like as shown in FIG. 5 by driving the loading motor 13a to execute loading and unloading operations. Also,
14 is a brake plunger drive circuit, which is a reel motor.
The brake plunger 14a is driven with respect to 11a and 12a. Each of the above driving circuits is controlled by the controller 10.

Reference numeral 15 denotes a frequency generator (hereinafter, referred to as FG) for detecting rotation provided on the S reel, which generates, for example, an N-wave sine wave with one rotation of the S reel. Similarly, reference numeral 16 denotes an FG provided on the T reel. The generated reel rotation detection signal is supplied to the controller 10 and used for various controls.

The controller 10 also includes a capstan
The capstan rotation direction detection signal generated by the direction detection circuit 18 based on the FG 17 and the tape top sensor 19, the tape end sensor 20, the cassette detector 21, the recordable detector 22,
Various detection signals from the soft tape detector 23, the unloading limit detector 24, and the like are input as information necessary for operation control. Although not shown, the controller 10 outputs a drum rotation servo signal and a capstan servo signal to the drum motor and the capstan motor.

The tape recording / reproducing apparatus of the present embodiment is configured as described above as a loading and reel driving system circuit block, and the controller 10 operates various internal programs based on information from the main controller 30 and each detector. Thus, a control signal is output to each drive circuit (11, 12, 13, 14) to execute a necessary operation. However, a normal operation (reel driving at the time of recording / reproduction, etc.) is performed in a known manner. Therefore, the description is omitted.

In the controller 10 of this embodiment, in addition to the general reel operation control block, the functional block shown in FIG. , It is possible to predict a reel rotation failure at the time of an unloading operation and execute a corresponding operation.

In the figure, 41 is an FG detecting means for detecting an output from the FG 15 or 16, and 42 is an operation determination for determining whether or not the operation currently being executed under the control of the main controller 30 is an operation corresponding to the tape running mode. Means. That is, playback,
A determination signal is output when an operation for running the tape, such as variable speed reproduction, fast forward, and rewind, is being performed (during tape running mode).

Reference numeral 43 denotes abnormality detection means for detecting that an abnormality has occurred in the reel rotation operation based on information detected by the FG detection means 41 when a determination signal is supplied from the operation determination means 42. Is stored in a predetermined address of the internal RAM 45 of the controller 10, for example.

Reference numeral 44 denotes a stop control unit, which controls the reel motor drive circuits 11 and 12 and the brake plunger drive circuit 14 (and a capstan motor (not shown)) when the abnormality detection information is supplied from the abnormality detection unit, to control the tape running. Stop.

Reference numeral 46 denotes a loading / unloading operation control means (hereinafter referred to as an operation control means). Based on a loading or unloading command from the main controller 30, control signals for the loading drive circuit 13, and the S and T reels are provided. Occurs. That is, at the time of loading, the T reel is locked so as not to rotate, the S reel is set free, and then the loading mechanism is driven so that the tape is pulled out from the S reel and loading is executed. At the time of normal unloading, after the T reel is locked, the winding operation is performed on the S reel, and the loading mechanism performs the reverse operation of the loading operation. Control to store.

Reference numeral 47 denotes an investigation unit that searches for a predetermined address in the RAM 44 when the unloading operation is performed by the operation control unit 46, and investigates whether or not abnormality occurrence information is stored in the address by the abnormality detection unit 43. Then, the investigation result is output to the operation control means 46. Then, when the occurrence of an abnormality is confirmed as a result of the investigation, the detection signal is supplied to the operation control means 46, and the operation control means 46 performs the abnormality handling control described later.

The operation performed by each of the above functional blocks will be described with reference to the flowcharts of FIGS.

First, FIG. 3A shows the abnormality detection operation of the present embodiment. As described above, during the reel rotation operation, that is, when the operation mode is the operation mode such as reproduction or fast forward,
An abnormality is detected in the abnormality detecting means 43 based on the FG detection information. Specifically, when the FG (reel rotation detection signal) cannot be obtained in the tape running mode, or
If the FG is irregular, and if the FG is obtained for the time being but the reel rotation is recognized to be extremely slow, it is determined that the FG is abnormal (F100, F101). That is, it detects when the reels are not rotating normally despite the tape running mode.

When the reel running abnormality is detected, the abnormality detecting means 43 supplies the abnormality occurrence information to the stop control means 44 to stop the tape running (F102) and, at the same time, sends the abnormality occurrence information to the RAM 45 in a predetermined manner. Stored in the address (F10
3). If the FG is always normally obtained, the stop control and the storage control are not performed. Therefore, by the above operation, whether the tape running failure has occurred for some reason or the tape running is normal in the tape running mode can be grasped later by the stored contents of the RAM 45.

Next, the unloading operation in the present embodiment is executed according to the flowchart of FIG.

When the unloading command is supplied from the main controller 30 to the operation control means 46 (F200), the RAM 45 is searched by the investigation means 47 as described above, and an abnormality occurs during the tape running operation before the unloading. It is checked whether or not it has been (F201). If the abnormality detection information is not stored in the predetermined address of the RAM 45 by the abnormality detection means 43, the normal unloading as described above is executed (F202). If the abnormality occurrence information is detected, The operation control means 46 controls the reel motor drive circuit 12 to increase the reel drive voltage, thereby increasing the winding torque of the S reel (F203). In other words, when the abnormality occurrence information is detected, the reel rotation operation was disturbed by tape winding unevenness or the like during the immediately preceding tape running,
Even during unloading, it is predicted that the tape cannot be easily wound with the winding torque based on the normal reel drive voltage. For this reason, the winding torque is increased in advance, and the tape that has been pulled out by the semi-forced loading is wound up.

As described above, when it is recognized that there is an obstacle to the reel rotation operation, that is, when unloading is performed as it is, a winding failure may occur, the tape winding torque is increased in advance and the tape is unloaded. Depending on the degree of the trouble, the occurrence of poor winding can be almost prevented, and therefore the accident that the tape is pinched by the lid and damaged by the subsequent ejecting operation can be reduced.

Note that the abnormality occurrence information stored in the RAM 45 is deleted when unloading after the occurrence of the abnormality ends.

[Effects of the Invention] As described above, the tape recording / reproducing apparatus of the present invention detects the reel rotation state in the tape running mode, so that when a reel rotation abnormality occurs, it detects the abnormality and detects the abnormality. Since the occurrence information is stored and the reel winding torque is increased in advance in response to the occurrence of the abnormality at the time of unloading, the occurrence of defective tape winding at the time of unloading is significantly reduced. There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a drive system circuit of a tape recording / reproducing apparatus according to the present invention. FIG. 2 is a functional block section constituted by software in a controller according to the present embodiment. FIG. 4B is a flowchart for explaining the operation of the present embodiment. FIG. 4 is an explanatory diagram of a loading state. FIGS. 5A and 5B are explanatory diagrams of a tape winding failure at the time of unloading. It is a perspective view showing the state where a tape was pinched by a lid. 10 is a controller, 11 is a T reel motor drive circuit, 12 is an S reel motor drive circuit, 13 is a loading mechanism drive circuit, 14 is a brake plunger drive circuit, and 15 and 16 are FG, 30
Is a main controller, 41 is FG detection means, 42 is operation determination means, 43 is abnormality detection means, 44 is stop control means, and 45 is RA
M and 46 denote operation control means, and 47 denotes investigation means.

Claims (1)

(57) [Claims] 1. A tape recording / reproducing apparatus which performs a tape running operation by loading a tape from a mounted tape cassette, a rotation detecting means for detecting a rotation operation of a reel, and a reel detecting means for detecting a rotation of the reel in a tape running mode. Abnormality detecting means for judging that a tape running abnormality has occurred when a rotation operation is not detected; storage means for storing the abnormality occurrence information when the tape running abnormality occurrence information is obtained by the abnormality detecting means; At the start time, an investigating means for searching and investigating whether or not abnormality occurrence information is stored in the storage means, and when the abnormality occurrence information is detected by the investigation means, the tape winding torque is increased from a normal level. Operation control means for controlling the unloading operation to be performed. Tape recording and reproducing apparatus according to claim.