JPH0344856A - Tape loading mechanism for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent damage from being generated in a tape during tape loading by changing torque to be applied to each reel driving motor. CONSTITUTION:At the time of loading a tape, when the rotating directions of respective supply side and take-up side reels 2 and 3 to be detected by means, which respectively detects the rotating directions of the reels 2 and 3 in a cassette 1, are same as the direction of the torque applied to the respective reels 2 and 3, the torque to be applied to the respective reels 2 and 3 is changed by a means to set the torque to be applied to the respective reels 2 and 3 and the both respective reels 2 and 3 are always rotated reversely to the direction of the applying torque. Thus, in the tape loading operation, the tape to be pulled out from the inside of the cassette 1 is not traveled only in one direction and the damage to the tape can be prevented.

Description

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

[Conventional technology]

Conventionally, the tape loading mechanism in a cassette type magnetic recording/reproducing device has been designed to reduce the size of the mechanism, shorten the tape loading time, and prevent tape damage, as described in, for example, Jikai Ill@62-239455. Then, using the V loading mechanism, when loading the cassette, find the ratio of the winding diameters of the supply side reel and the take-up side reel of the cassette tape, and according to the winding diameter ratio of 7, the supply side reel and the take-up side reel are There is a method in which a torque is set so that the tape tension run is the same, and after it is applied to both reels, a tape loading operation or an unrope inking operation is performed.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional technology, torque is applied to the supply side reel and take-up side reel of the cassette tape before the start of the tape loading operation, and the tape is fed by a small amount by rotating both IJ + reels, thereby increasing the winding diameter ratio. In order to determine the additional torque during tape loading operation,
It takes a certain amount of time to start the tape loading operation.

Therefore, in the present invention, within the tape loading operation,
During tape loading, by monitoring the rotational directions of the supply reel and take-up reel of the cassette tape, and changing the additional torque to each reel drive motor so that the tape does not run in one direction. The purpose of the present invention is to prevent tape damage from occurring during tape loading and to perform tape loading operations at high speed.

[Means to solve the problem]

In order to achieve the above object, means for detecting the rotational direction of the supply reel and take-up reel in the cassette and a torque setting means for applying torque to both reels are provided, and the rotational direction is detected during tape loading operation. Tape loading is performed while changing the torque applied to each reel depending on the rotational direction of each reel detected by the means.

[Effect]

The rotation direction of each reel detected by the means for detecting the rotation direction of the supply reel and take-up reel in the cassette during tape loading operation is the same rotation direction with respect to the direction of the torque applied to each reel. At the same time, the additional torque setting means for each reel changes the additional torque applied to each reel so that each reel always rotates in the opposite direction to the additional torque direction.

By doing the above, during the tape loading operation, the tape pulled out from the cassette does not run in only one direction, making it possible to prevent damage to the tape due to rising or falling of the tape, and when inserting the cassette. It is possible to perform the process from the beginning to the completion of tape loading at high speed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows the overall configuration of a tape loading device according to the present invention. In the figure, 1 is a cassette, 2 is a supply reel of the cassette tape, and 3 is a take-up reel. 4 is a drive motor for the supply reel 2, and 5 is a drive motor for the take-up reel 5. 9.
10 is a tape guide and an inclined tape guide installed on the supply side moving base 11;
Reference numeral 3 denotes a tape guide and an inclined tape guide that are set up on the take-up side moving base 14. Further, 17 is a tape pull-out guide on the supply side, and 18 is a tape pull-out guide on the winding side. The moving bases 11 and 14 and the tape pull-out guides 17, 18 are moved by the loading motor 7 driving the loading gear 15 via the drive gear block 8, so that the cassette tape 1? is pulled out from the cassette and wound around the rotating head drum 16, forming a predetermined tape running system. 6 is a microcomputer (hereinafter abbreviated as microcomputer) that controls the tape loading operation. The microcomputer 6 receives two-phase F G (Frequeno
7 Gsnerator) Output signals and various sensors related to the tape loading operation, such as tape end sensors 20 and 21 for detecting the leader tape at the beginning and end of the cassette tape, and for detecting the start and completion positions of the tape loading operation. sensor (not shown)
In addition, an output signal from a bobbin meter (not shown) or the like for detecting the position of the tape load blowfish operation is sent. Inside the microcontroller 6, each of the above 81! To perform calculation processing of information, reel rotation direction 1 rotation speed 2 reel diameter ratio,
Information such as the length of the tape to be pulled out from inside the cassette 1 is obtained, and based on this information, a control signal for controlling the tape loading operation is sent to a mechanism drive source such as the loading motor 7.

The tape loading operation is controlled by the microcomputer 6, and a chart 70 of the operation is shown in FIG. 2. The tape loading operation will be described below with reference to this flowchart.

First, cassette 1 is inserted into this magnetic recording and reproducing apparatus,
It is determined whether the tape is placed at a predetermined position and in a predetermined state where the tape can be loaded.

This determination is performed using, for example, a photosensor (23).

When it is confirmed that the cassette 1 is placed in a predetermined position, a certain torque is applied to the supply reel 2 and the take-up reel 3 in order to stretch the tape 19 in the cassette 1 without slack. The supply side reel drive motor 4 and the take-up side reel drive motor 5 are controlled by the microcomputer 6 so as to apply tension to the tape in the direction shown in FIG.
4). By the above operation, when each tape guide starts pulling out the tape 19, damage to the tape 19 due to slack etc. can be avoided. In addition, the above-mentioned torque for tensioning the tape is required to tension the tape without slack in order to avoid damage to the tape. The bare minimum is fine.

After the tape is stretched, the loading motor 7 starts to be driven by a command from the microcomputer 60 (25).

This driving force drives the loading gear 15 via the drive gear Glock 8, thereby driving the moving base 11.1.
4 and tape pull-out guides 17 and 18 are driven to pull out the tape 19 from inside the cassette 1 and remove the tape 19 from the rotating head drum 1.
A so-called tape loading operation is started, in which the tape is wound around No. 6.

When the tape rope ink operation is started in this way, back tension is applied to the tape 19 being pulled out from the supply reel drive motor 4 and the take-up reel rolling motor 5, respectively. A certain amount of torque is applied in the direction that provides the 7-gastric response (26). At this time, if the tape winding diameters of the supply reel 2 and take-up reel 5 are approximately equal, the tape will be fed out from both reels without rotating in the direction opposite to the direction of the applied torque. If the tape winding diameters of the side reel 2 and the take-up reel 3 are significantly different, the tape 19 is unwound from the smaller side of the back ten to the larger side, that is, only from the reel with the larger tape winding diameter. It is wound onto a reel with a smaller diameter, and both reels begin to rotate in the same direction. The tape posture during tape loading is usually unstable, and if the tape starts running in one direction like this, the tape may rise or fall, causing damage to the 7-run part of the tape guides and the rotating head drum. 16
Tape damage is likely to occur at the lead parts, etc.

In order to prevent tape damage as described above, the Miko/6 constantly monitors the rotational direction of the reel from the FG output signals output from the supply reel drive motor 4 and the take-up reel drive motor 531.32) When the supply IJ-reel 2 and the take-up reel 5 rotate in the same direction, the microcomputer 6 sends the supply reel A control signal is sent to the drive motor 4 and the take-up reel drive motor 5 to control the additional torque (33).

The method for controlling the additional torque described above is performed as follows.

That is, only the torque of the reel drive motor rotating in the same direction as the additional torque direction is reduced until it rotates in the opposite direction. Alternatively, by increasing the torque of the reel drive motor that is rotating in the opposite direction to the additional torque direction, it is also possible to rotate the reel that is rotating in the same direction as the additional torque direction in the opposite direction. However, with the above control method, the tension of the tape during loading may become too weak, causing the tape to sag, or conversely, the tension may become too strong, resulting in more loading than necessary.

Therefore, by minimizing the torque of the reel drive motor rotating in the same direction as the above-mentioned additional torque direction and simultaneously increasing the torque of the other reel sliding motor, the tape runs only in one direction. This makes it possible to maintain a well-balanced tape tension without any problems.

At the start of tape loading, it is determined whether there is a leader tape at the beginning or end of the tape 19.

7 This is done with a tape end sensor that uses an oto sensor. When the leader tape is detected, the loading motor 7 is immediately stopped by a command from the microcomputer 60 and then reversely driven to rewind the tape 19 to the unloading state (28) (29). After that, if the tape is beginning to be wound, the tape 19 is fed a certain length within the cassette i, and if it is the end of the tape winding, it is rewound by a certain length (50), and the tape is stretched again. state and resume tape loading. The above operation makes it possible to prevent damage to the rotating head due to the leader tape.

Then, once tape loading completion is detected,
The driving of the loading motor 7 is stopped, and tape loading is completed (35.36).

The tape loading completion state is detected by, for example, using a photo sensor to detect that the tape 19 has been pulled out to a predetermined position by each tape guide.

〔Effect of the invention〕

As described above, according to the present invention, by detecting the rotational direction of the reels in the cassette during tape loading operation, it is possible to set and change the additional torque to each reel. This makes it possible to prevent damage to the tape and to perform the process from insertion of the cassette to completion of the tape loading operation at high speed.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention. FIG. 2 is a 70-chart of a tape loading operation in one embodiment of the present invention. 1... Cassette 2... Supply side 5... Winding side 4... Supply side 5... Winding side 6... Microcomputer 7... Loading motor 19... Tape. One-rule rule drive motor sliding motor

Claims (1)

[Scope of Claims] Means for detecting the rotational direction of the reels (2, 3) of the cassette tape (1) during tape loading; , 3) means for setting and applying additional torque to the tape loading mechanism in a magnetic recording/reproducing device.