JPH0453056A - Magnetic cassette tape device - Google Patents

Abstract

PURPOSE:To securely house the cassette of a magnetic tape and to reduce noise by forming an arm and a spring means as prescribed mechanisms. CONSTITUTION:This magnetic cassette tape device is composed of a first arm 12 equipped with a mechanism 6 to lock a reader block 4 provided at the head of the magnetic tape of a cassette 2, second arm 14 which is freely stretchable for pressing the reader block into the cassette, motor 15 to turn the arm 14, and a groove 16 to guide the lock mechanism by a prescribed track. When housing the magnetic tape in the cassette, the reader block is locked to the first mechanism 6 and returned to the cassette by the guide groove with the turn of the arm 14. At such a time, reaction is stored in the spring means and the arms 12 and 14 are further turned to form one straight line. Then, the reader block is pressed into the cassette by the spring means when being coincident with the housing position of the cassette.

Description

[Detailed Description of the Invention] [Summary] In a magnetic cassette tape device, the magnetic tape is pulled out from the magnetic tape cassette and suspended on a take-up reel on the device side via a predetermined route. Regarding the tape threading mechanism that rewinds the tape into the tape cassette, in order to improve the reliability of operation and reduce the cost, we have installed a locking part at the tip that locks the leader block provided at the tip of the magnetic tape stored in the cassette. a first arm provided therein; and a spring means that rotatably supports the first arm and urges the first arm to protrude with at least a force greater than pushing the leader block into the cassette, the first arm being extendable and retractable. The device includes a supporting second arm, a motor that rotates the second arm, and a guide groove that guides the locking portion to draw a predetermined trajectory.

[Industrial application field]

The present invention relates to a tape threading mechanism in a magnetic cassette tape device, in which a magnetic tape is pulled out from a magnetic tape cassette, wound onto a take-up reel on the device side via a predetermined route, and then rewound back into the magnetic tape cassette after completion of the tape threading.

Various devices are used as data storage devices for electronic computers.

Magnetic tape devices are a typical example, and in recent years, due to demands for miniaturization, magnetic cassette tapes and the like without a take-up reel have come into use.

In this case, it is necessary to pull out the magnetic tape from the cassette inserted into the reel on the device side, suspend it, and then rewind the magnetic tape back to the original cassette after finishing, so reliable operation is required. [Prior Art] In recent years, magnetic tape devices have become more compact, and the tape media used is also shifting from open-reel tapes to small-sized cassette tapes.

Further, in the conventional magnetic tape device, an air supply device or the like is mounted on the device, and the magnetic tape is suspended using air.

However, due to the demands for reducing the noise generated by using air and downsizing the device, it has become difficult to suspend the magnetic tape using air. mechanism is provided.

This method controls the start, stop, speed, tension, etc. of the magnetic tape by controlling the rotation of the device reel and the cassette reel without using a capstan.

The magnetic tape 1 is wound and stored on a reel 3 of a cassette 2, and a leader block 4 is provided at the tip of the magnetic tape 1 to prevent it from falling off easily.
It is pushed in with some force.

When the cassette 2 is stored as shown, the device detects this and begins to pull out the magnetic tape 1 and wind it at a predetermined position.

First, the loading arm 5, which is made up of four members formed into a link shape, is rotated, and the locking mechanism 6 at the tip thereof is locked to the leader block 4.

The rotation of the loading arm 5 is guided by the guide groove 7 so that its tip draws a predetermined trajectory.

That is, when the loading arm 5 rotates counterclockwise, the leader block 4, which was locked at its tip, comes off the cassette 2, passes in front of the magnetic head 9 along the tape guide 8a, and moves to the opposite side. The tape passes through the tape guide 8b and is further inserted into the center of the reel 11 on the apparatus side via the tension sensor IO.

In this way, the suspension of the magnetic tape 1 is completed, but after the predetermined operation is completed, the magnetic tape 1 is stored in the cassette 2 in the opposite manner to that described above.

[Problem to be solved by the invention]

As described above, the processed magnetic tape is stored in the cassette again, but since the loading arm 5 that operates the leader block 4 is guided by a guide groove in the middle, there is no error. The closer you go to the tip, the more enlarged it becomes.

Furthermore, the leader block 4 must be pushed into the cassette 2 with a force of 1.2 kg at the end of the loading arm 5, which requires a large torque from the motor that rotates the loading arm 5 at its base. do.

If the above conditions were not met, there would be a problem that the leader block 4 would collide with the cassette 2 and the loading arm 5 would bounce back, making it impossible to insert the cassette.

The present invention aims to improve reliability of operation and reduce costs.

[Means to solve the problem]

In order to achieve the above object, in the present invention, as shown in the plan view of FIG. A first arm 12 provided at the tip and rotatably supports the first arm 12, and the first arm 12
A second arm 14 is extendably supported by a spring means 13 that urges the leader block 4 to protrude with at least a force greater than pushing the leader block 4 into the cassette 2, and a motor I5 that rotates the second arm 14 is engaged. Draw a predetermined trajectory for the stop mechanism 6 (
It is provided with a guide groove 16 for guiding the user.

[Effect]

When storing the magnetic tape in the cassette, the second arm I
4, a pressing force is stored in the spring means 13 between the first arm 12 and the first arm 12.

This force is at its maximum when the first and second arms are in a straight line, and by setting the leader block 4 to be stored in the cassette 2 at this time, the force of the spring means 130 can easily be applied. Storage becomes possible.

The spring means 13 also acts as a buffer material, absorbing the force of the leader block 4 colliding with the cassette.

〔Example〕

1 and 3 show an embodiment of the present invention.

Identical parts are designated by the same reference numerals throughout the figures.

In the present invention, as shown in the plan view of FIG.
The first arm 12 is rotatably supported, and the first arm 12 is connected to at least the cassette 2.
(for example, 1.
a second arm 14 that is extendably supported by a spring means 13 that urges the second arm 14 to protrude with a weight of 2 kg or more;
It comprises a motor 15 that rotates the locking mechanism 6, and a guide groove 16 that guides the locking mechanism 6 to draw a predetermined trajectory.

That is, the first arm 12 and the second arm 14, which correspond to the loading arm 5 of the prior art, are shown in FIG.
), and the second arm 14 is equipped with two parallel left and right coil springs to project the first arm 12. A spring means 13 is provided.

The second arm 14 consists of three components, firstly the first
a T-shaped support member 1.4a that rotatably supports the arm 12 at the tip end rotation shaft I7, and a main body portion 14b that supports the support member 14a with two left and right slidable support shafts 18.
and a stopper 14c for fixing the rear end portion of the support shaft 18 protruding from the main body portion 14b.

The spring means 13 is constructed by winding a coil spring or the like around the support shaft 18.

The stored force of the spring means 13 needs to be set to be small on both the left and right sides (at least 1.2 kg for pushing the leader block 4 into the cassette 2 on both sides).

The tip of the first arm 12 is equipped with a locking mechanism 6 such as a thread pin that locks onto the leader block 4 as in the prior art, and a sliding member (not shown) is fitted into the guide groove 16. It is configured to draw a predetermined trajectory based on the rotation of the second arm 14, pass through the tape guide 21, the magnetic head 9, and the tape guide 21 on the opposite side, and be inserted into the center of the reel 11 on the apparatus side. ing.

Further, the main body portion 14b of the second arm 14 is
This is done by rotating the gear 20 of the motor 15 that meshes with the gear 19 fixed to the motor.

The operation when storing a magnetic tape in a cassette will be described below with reference to FIGS. 3(a) to 3(C).

As shown in FIG. 4A, the leader block 4 is locked to the locking mechanism 6 of the first arm 12, and the leader block 4 is locked to the locking mechanism 6 of the first arm 12,
As it rotates, it is guided by the guide groove 16 and returns toward the cassette 2.

At this time, a repulsive force is gradually accumulated in the spring means 13.

As shown in the same figure (bl), the first arm 12 rotates further.
When the second arm 14 and the leader block 4 are aligned in a straight line, the leader block 4 is aligned with the storage position of the cassette and is pushed into the cassette by the pressing force of the spring means 13.

This completes the work of storing the magnetic tape I in the cassette 2, and the cassette 2 is ejected from the apparatus by another drive mechanism (not shown).

Thereafter, the arm further rotates a small amount as shown in the same figure (C), and by bringing the first arm 12 and the second arm 14 to the reverse position, self-locking is performed using the remaining force of the spring means 13. It will be in a standby state.

Further, the spring means 13 acts as a buffer material, and absorbs the impact force when the leader block 4 collides with the cassette 2, for example, and has the effect of reducing noise.

Furthermore, since the number of parts is reduced compared to the conventional technology, assembly becomes easier and fine adjustment work is no longer necessary, making mass production possible at low cost. be.

〔Effect of the invention〕

According to the present invention, the magnetic tape can be reliably stored in the original cassette, and mass production can be performed at low noise and cost, resulting in great economical and industrial effects.

FIG. 2(b) is a plan view of FIG. 2(a), FIGS. 3(a) to (C) are diagrams explaining the operation of the present invention, and FIG. 4 is a 1V side view of a conventional magnetic cassette tape device. .

In the figure, 1 is a magnetic tape, 2 is a cassette, 4 is a leader block, 6 is a locking mechanism, 9 is a magnetic head, 11
is a reel on the device side, 12 is a first arm, 13 is a spring means, I4 is a second arm, 14a is a support member,
14b is the main body, 1.4e is the stopper 15 is the motor, 16 is the guide groove, 17 is the rotating shaft,
18 is the support shaft, 19.20 is the gear,
21 is a tape guide 1;

[Brief explanation of the drawing]

FIG. 1 is a plan view of the magnetic cassette tape device of the present invention; FIG. 2(a) is a side view showing the first arm and the second arm; Side view shown (I2) Yumei's magnetic force cera and tape Plan view history of Table 1 1 Figure (b) 2nd hit = 388-

Claims (1)

[Claims] A locking mechanism (6) that locks the leader block (4) provided at the tip of the magnetic tape stored in the cassette (2)
The first arm (12) is rotatably supported, and the first arm (12) is attached to at least the cassette (2) and the leader block. a second arm (14) that is extendably supported by a spring means (13) that urges the second arm (4) to protrude with a force greater than the pushing force; and a motor (15) that rotates the second arm (14). ) and a guide groove (16) for guiding the locking mechanism (6) to draw a predetermined trajectory.