JPH0822660A - Magnetic tape driving device - Google Patents

Abstract

PURPOSE:To surely maintain the operation of a tray for vertically moving a cartridge and to secure the reliable engagement of a tape reel with a chucking hub of a driving part. CONSTITUTION:An arm 2g extended from the end part of the tray is abutted on a chassis 6 at the descending position in the tray 2 wherein the cartridge A is housed. The reactive force due to the connection of the tape reel and a spindle is thereby suppressed to execute the sure chucking operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape drive device, and more particularly to a mechanism for transporting a cartridge containing a wound magnetic tape to a predetermined position of the device.

[0002]

2. Description of the Related Art This type of magnetic tape device is roughly divided into two types: an open reel type tape reel as an information recording medium and a cartridge type.

It is well known that, in recent years, a magnetic tape device is required to have a large capacity in order to record a large amount of information, and a device using a cartridge type as a medium is widespread in terms of usability. Is.

A cartridge intended to be used for a model 3480 manufactured by IBM Corp. as a storage device using this type of cartridge has an outer shape of 4 inches wide, 5 inches long and 1 inch high, The specific configuration is described in US Pat. No. 4,452,406,
For details, refer to the same publication.

This cartridge is a one-reel type in which a magnetic tape is wound and housed. The cartridge is set at a predetermined position by inserting it from the front opening of the device, and the leader block attached to the tip of the tape is pulled out of the device. The tape is wound around the take-up hub by being pulled out by the means, and the tape is driven to drive the magnetic head to record and reproduce predetermined information.

An example of a magnetic tape drive device capable of recording or reproducing in the same recording format while maintaining compatibility with the above-mentioned IBM cartridge is disclosed in, for example, Japanese Patent Laid-Open No. 2-2.
The device shown in Japanese Patent No. 57461 has been proposed.

The above-mentioned conventional apparatus inserts the cartridge into the tray to detect the insertion state of the cartridge and the switch (write enable switch) for detecting whether or not the magnetic tape in the cartridge can be written. When a mechanical detection switch such as) is pressed by the tip of the cartridge, a control signal is supplied to the device and the device is selectively driven.

In the device which is selectively set in the driving state, the driving mechanism operates according to the detection signal of the switch. The tray accommodating the cartridge is lowered horizontally by the link mechanism, and in the lowered position, the chucking hub of the tape reel around which the magnetic tape is wound is firmly engaged with the spindle of the motor functioning as the take-up side and can be driven.

[0009]

By the way, in the above-mentioned apparatus, a cam attached to a drive mechanism such as a motor is rotated as a means for transporting the cartridge to a loading position and a predetermined mounting position of the apparatus by a tray. The rotation of the cam drives a linkage composed of a plurality of links to vertically reciprocate the tray.

However, the linkage composed of a plurality of links configured to reciprocate the tray in the vertical direction needs to be arranged in a pair on the left and right sides of the tray for the purpose of vertically moving the tray in the horizontal state. If the tray is not assembled with high precision, stable transport of the tray cannot be expected, and the reaction force against the force in the mounting direction of the tray that has reached the cartridge mounting position directly acts on the linkage, resulting in unstable mounting. There is. In addition, each component that constitutes such a linkage is required to be processed with high precision and to be assembled accurately. In addition, in order to prevent the link from being twisted in the linkage, it is necessary to give sufficient rigidity to the components, which causes various problems such as not only increasing the number of components but also not being able to configure the device inexpensively. It was something that had.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to maintain a horizontal state of a tray during tray transportation and cartridge mounting, and to stably drive the tray. The cartridge is mounted in a tray that moves up and down, and the guide pin is used to guide the tray to the specified mounting position. In a magnetic tape drive device in which a tape reel in a cartridge and a reel drive section are connected by being lowered, there is a drive pin driven to move the tray up and down, and the drive pin is provided on one side separated from the drive pin. The tray drive unit is arranged, and a regulation unit integrated with the tray is provided on the other side separated from the drive pin. When but that led to the cartridge mounting position, said restricting portion is to provide a contact with the magnetic tape driving device constituted by the moment applied to the mounting direction in the tray to the fixing unit.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic tape drive device according to the present invention will be described in detail below with reference to FIGS.

As the magnetic tape drive device of the present invention, the above-mentioned IBM which promotes the compatibility of the system in the same manner as the above-mentioned device.
It accepts a 3480 cartridge that is compatible with the company's equipment and allows information to be recorded or reproduced in a recording format similar to that used by IBM.

That is, as shown in FIG. 2, the cartridge A is pivotally displaced from the front opening 1a of the casing 1 to the position shown by the alternate long and short dash line from the position shown by the solid line to the rectangular tray 2 at the raised position. By loading the cartridge A into the storage section 4 of the cartridge A, a switch provided at the back of the tray 2 at the tip of the cartridge A for detecting the insertion state of the cartridge A and whether or not the magnetic tape in the cartridge can be written are determined. By pressing the mechanical detection switches 5a, 5b such as a detection switch (write enable switch),
Various states for the device are set. After that, the tray 2 is lowered to the mounting position of the cartridge A by the output signal of each detection switch.

At the lowered mounting position of the cartridge A, the motor 7 mounted on the chassis 6 and functioning as a winding side.
A chucking hub (not shown) of the tape reel 8 meshes with the spindle 7a of. At this time, the lower position of the cartridge A is regulated by the stopper pin 10 planted on the chassis 6, and the position of the cartridge A is regulated by the positioning pin 9. Then, the tape pull-out means of the device operates, pulls out the leader block attached to the tip of the magnetic tape, winds it around the winding-side hub, and records / reproduces a predetermined information signal on the magnetic tape for winding. Is configured to take.

Here, a specific structure of the tray 2 for carrying the cartridge A will be described. The tray 2 can receive the cartridge A as shown in FIG.
The lower plate 2b, the pair of left and right side plates 2c and 2d, and the back plate 2e are formed into a rectangular shape, and have the opening 2f into which the cartridge A is inserted at a position corresponding to the front opening 1a of the housing 1 as described above. . The approximate center of one side plate 2d are a pair of upper and lower guide pins 2d _1, 2d ₁ is implanted, 1 at a position on the other side plate 2c and opposite the upper guide pin 2d ₁
Two guide pins 2c ₁ are planted. Guide pin 2
A spindle shaft 7b of the motor, which will be described later, is located on the line connecting the centers of the d ₁ guide pins 2c ₁ .

An opening / closing door 3 is rotatably supported on the side plates 2c and 2d. In addition, the hanging plate 2b ₁ is bent and formed on the front side of the lower plate 2b.
_A guide plate 2b ₂ is hung at the rear of the unit ₁ in parallel therewith. Note that 2b ₃ is a guide pin attached to the guide plate 2b ₂ .

On the back plate 20e, there are a switch for detecting the insertion state of the cartridge A as in the above-mentioned conventional structure and a switch (write enable switch) for detecting whether or not the magnetic tape in the cartridge can be written. A pair of mechanical detection switches 5a and 5b are attached, and their operating rods project into the tray 2.

Further, the side plate 2d is provided on the back plate 2e.
A length L that is parallel to and extends on the opposite side of the opening 2f.
The arm 2g, which is a restricting member, is fixed. An elongated hole (driving hole) 2g ₂ is formed in the longitudinal direction in the fixed side base portion 2g ₁ of the arm 2g, and the elongated hole 2g ₂ on the cam attached to the geared motor 16 which is the driving portion as shown in FIG. The eccentric pin (drive pin) 16a is fitted and inserted, and the eccentric pin 16a rotates (rotates) as the geared motor 16 rotates.
As a result, the tray 2 moves up and down by the transmission of power through the elongated hole 2g ₂ . The tip 2g ₃ of the arm 2g is attached to the tray 2
Is a restricting portion that can come into contact with the chassis 6 in the lowered position.

A pair of through holes 2a ₁ and 2a ₁ facing each other along the insertion direction of the cartridge A are formed in the upper plate 2a.

Reference numerals 11 and 11 denote sliding members fitted into the through holes 2a ₁ and 2a ₁ , respectively, and have a recess 11b having a step size h with the flat portion between a pair of left and right wide flat portions 11a and 11a. Then, it is integrally formed in a long shape with resin or the like. Further, 11c is a tongue piece that hangs from the recess 11b, and has a size and shape that can be fitted into the through holes 2a ₁ and 2a ₁ of the upper plate 2a. Therefore, this sliding member 1
By fitting the _one tongue piece 11c, 11c into the through holes 2a ₁ , 2a ₁ , respectively, the wide flat portions 11a, 11a are brought into contact with the upper plate 2a and positioned. In addition, each flat portion 1
Pins 12 and 12 are erected on 1a and 11a.

Reference numeral 13 is a leaf spring which is an elastic means installed between the pair of sliding members 11 and 11, and is the flat surface portion 11 described above.
13a corresponding to a and 11a and having through holes 13a ₁ and 13a ₁ through which the pins 12 and 12 are inserted are provided, and the elastic pieces and the slits 13b are provided respectively. ... 13b, and a pair of second elastic pieces 1 corresponding to the positions of the recesses 11b, 11b.
3c and 13c. The leaf spring 13 is provided with the tongue piece 11c and the sliding member 11 having the tongue piece 11c fitted in the through holes 2a ₁ and 2a ₁ of the upper plate 2a, and the flat portion 1 thereof.
Through holes 13a in pins 12 and 12 of 1a and 11a, respectively.
_{With 1} and 13a ₁ fitted together, through hole 13c in the center
_It is assembled on the tray 2 together with the sliding member 11 by fixing it to the screw hole 2a ₂ of the upper plate 2a with the screw 14 through ₁ . As a result of this assembly, the leaf spring 13 has a flat surface portion 1.
Each tongue piece 11c of the sliding member 11 is bent by the thickness of 1a.
Which is elastically projected into the tray 2
The second elastic pieces 13c, 13 corresponding to the recesses 11b, 11b are aa and 11a abutting against the upper plate 2a and positionally regulated.
c keeps a predetermined interval.

In the magnetic tape drive device having the above structure,
In the tray 2 stopped at the raised position shown in FIG.
When the cartridge A is loaded by rotating the opening / closing door 1 as shown in (A), the tongue piece 11c of the sliding member 11 is pushed on the upper surface of the cartridge A against the elastic force of the first elastic pieces 13a ... 13a. Then, the cartridge A reaches the innermost portion of the tray 2 and presses the pair of switches 5a and 5b. At the time of this insertion, the first elastic pieces 13a ... 13 have an appropriate sliding resistance and are sufficiently resistant to the reaction force due to the pressing force of the switch, so that the cartridge A does not protrude from the tray 2 and is stable. Retained. In this state, the distance between the second elastic piece 13c and the recess 11b is small,
The two do not have an abutting relationship.

Then, the geared motor 16 on the fixed portion, which is the driving portion, operates in response to the detection signal of the switch, and the driving force is applied to the elongated hole 2g ₂ of the arm 2g as the eccentric pin 16a of the motor shaft rotates. Is transmitted and the tray 2 descends. Further, the tray 2 which holds the cartridge A is four guide pins _{2b 3, 2c 1, 2d 1} , the not shown fixed side of the apparatus as a guiding axis 2d ₁ guide grooves 15b, 15c, 15
Guided by a and 15a, it descends in a horizontal state, as shown in FIG.
To the mounting position. During this tray 2 descends, tray 2 position restriction in the longitudinal direction at the guide pins 2c _1, 2d _1, 2d ₁ is performed, the horizontal state maintained the position regulation of the right and left direction is performed by the guide pins 2b ₃ Geared motor 1
Stable driving can be performed without unnecessary load acting on 6.

The cartridge A contacts the stopper 10 and fits with the positioning pin 9 to regulate the lowered position. In this lowered position, the spindle 7a penetrates into the cartridge A so as to lift the cartridge A, and the elastic force of the spring 17 pressing the tape reel 8 and the pressing force acting on the chucking hub integrated with the tape reel 8 are applied to the cartridge A. A force for further pushing up the sliding member 11 is produced via this, and by this pushing up, the second elastic piece 13c abuts against the concave portion 11c, and the cartridge A is pushed in the tray 2 with an appropriate force (reaction force f ₁ described later). By holding the chucking hub, an appropriate adhesion force is exerted on the chucking hub, but the tape reel is guaranteed to rotate smoothly. At this time, assuming that the reaction force f ₁ that the tray 2 receives from the cartridge A is, the distance between the eccentric pin 16a and the guide pins 2d ₁ and 2c ₁ (spindle shaft 7a ₁ ) on which the force f ₂ that lowers the tray 2 acts. Due to s, the moment M ₁ (f
₁ × S ₁ ) occurs. The moment M ₁ receives a force in the direction in which the tray 2 is tilted, which may cause an unstable chucking operation.

However, the tray 2 of the present invention has the tip 2 of the arm 2g at the same timing as the mounting.
g ₃ contacts the chassis 6 (point P). Therefore, the eccentric pin 16a caused by the rotation torque of the geared motor 16 of the drive unit
Counterclockwise moment M ₂ (f ₂ × by the action of the distance S ₂ spaced by a point P with respect to the force f ₂ that acts on the
S ₂ ) acts. Further, the tray 2 has a cartridge A
Moment of force M ₃ {f ₁ (S ₁ + S ₂ )}
Is working. Therefore, it suffices if M ₂ > M ₃ ,
From f ₂ × S ₂ > f ₂ (S ₁ + S ₂ ), f ₂ > f ₁ ·
Since the relationship of (S ₁ + S ₂ ) / S ₂ is established, the torque of the geared motor 16 can be made small and a small one can be adopted, and the size and cost of the device can be reduced.

Then, the cartridge A which has reached the predetermined position
The tape pull-out means of a device (not shown) operates to guide the tape end (leader block) in the cartridge so that the tape is wound around the take-up hub, and the magnetic force is applied to the magnetic tape running by the rotational drive of the take-up hub. The head records or reproduces a predetermined signal.

[0028]

According to the magnetic tape drive apparatus of the present invention described in detail above, the reaction force due to the chucking operation of the cartridge in the tray which has reached the lowered position is suppressed.
Features such as stable chucking operation and reduced load on the drive pin, which allows the drive motor to be downsized, and the tray to be moved up and down by the guide pin to reduce the number of parts and the device size. is there.

[Brief description of drawings]

FIG. 1 is an external view of a tray showing an embodiment of a magnetic tape driving device of the present invention.

FIG. 2 is a side view of a magnetic tape drive device including the tray shown in FIG.

FIG. 3 is a plan view of the magnetic tape driving device of FIG.

FIG. 4 is a side view showing an operating state of the magnetic tape driving device of the present invention.

[Explanation of symbols]

1 ... door, 2 ... tray, 2b _3, 2c _1, 2d ₁ ... guide pin, 2 g ... arm, 6 ... chassis, 11 ... slide member, 13 ... plate spring, 16 ... geared motor, 16a ... driving pin.

Claims (1)

[Claims] 1. A tape reel and a reel drive in the cartridge, wherein a cartridge containing a magnetic tape wound therein is loaded in a vertically moving tray, and the tray is guided by guide pins and lowered to a predetermined mounting position. A magnetic tape driving device having a drive pin for driving the tray to move up and down, the reel driving part is arranged on one side separated from the drive pin, and separated from the drive pin. On the other side, a regulation portion integral with the tray is provided, and when the tray reaches the cartridge mounting position, the regulation portion abuts on the fixed portion to apply a moment to the tray in the mounting direction. Magnetic tape drive.