JPH0447774Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a magnetic tape drive device used as an external storage device for computers and the like.

(Prior Art) Conventionally, magnetic tape drive units used as external storage devices for computers and the like have been known that use open-reel type magnetic tape as the storage medium. In such units, autoloading is achieved by using an air flow to guide the magnetic tape wound on the supply tape reel to the take-up tape reel.

That is, as shown in FIG. 6, such a magnetic tape drive device passes the magnetic tape Tp wound around the tape reel 2 on the supply side fixed to the reel stand 1 which is rotationally driven by a motor (not shown) through the air outlet. 3,
The magnetic tape Tp is fed into the tape passage 6 and guided to the tape reel 7 on the take-up side by air currents as shown by the arrows in the figure blown out from 4 and 5, thereby loading the magnetic tape Tp. It's getting old.

In addition, in such a magnetic tape drive device, the magnetic tape Tp sent out by the air flow is
After the leading end of the tape is sucked into a slit 8 formed on the outer periphery of the tape reel 7 on the take-up side, it is guided by a tape guide 9, a guide roller 10 and a capstan roller 11 to form a predetermined tape path. Loading is now complete,
A head shield 13 is placed in the middle of the tape path 6 on the magnetic tape Tp that is then loaded.
The magnetic head 12 facing the magnetic head is brought into contact with the magnetic head 12 .

(Problems to be solved by the invention) By the way, in the magnetic tape drive device as described above, the light emitting element 14 and the light receiving element are used to detect whether or not the tape reel 2 on the supply side is placed on the reel stand 1. A device 15 is provided, and whether or not the tape reel is placed is detected based on whether the light emitted from the light emitting device 14 reaches the light receiving device 15.

In addition, this type of tape reel generally has a removable protect ring on the bottom surface to indicate that it is a recordable magnetic tape, and the presence or absence of this protect ring is detected by a detection pin (not shown). It's getting old.

In this way, in conventional magnetic tape drives, independent detection means must be used to detect whether a tape reel is placed and whether a protect ring is attached to the placed tape reel. This is undesirable as it inevitably increases the cost of the device.

In addition, in the conventional magnetic tape drive device as described above, if the tape reel 2 is not securely fixed to the reel stand 1, stable running of the magnetic tape Tp cannot be obtained. Even though it is impossible to ensure this, there is no means to confirm whether or not the tape reel 2 is securely fixed to the reel stand 1, and an improvement has long been desired.

(Means for solving the problem) This invention was made in view of the above-mentioned actual situation, and it is possible to check whether a tape reel is placed on the reel stand or not, and whether a protect ring is attached to the placed tape reel. It is an object of the present invention to provide a magnetic tape drive device capable of detecting, with one detection means, whether or not the tape reel is securely fixed to the reel stand.

In order to achieve this object, the present invention has a tape reel 2 mounted thereon and a rotary shaft 25, as shown in FIG.
a reel stand 20 that is rotationally driven by a reel stand; a detection means 23 that is fixedly installed apart from the reel stand; and a detection means 23 that is attached to the reel stand so as to be elastically displaceable in the direction of its rotational axis; When the tape reel is placed, it is elastically displaced in the direction of the rotation axis by the reel stand at a predetermined position on the reel stand and is maintained at a position corresponding to the detection means;
a first indicating member 21 that generates a pulse from the detection means as the reel stand rotates; A protect ring 2a is attached to the bottom surface of the tape reel.
is mounted, the reel is elastically displaced in the direction of the rotation axis by the protect ring at a different position on the same circumference as the predetermined position, and is maintained at a position corresponding to the detection means. A second indicating member 22 that generates a pulse different from the pulse of the first indicating member from the detection means as the table rotates.
and the first indicating member is provided to maintain a corresponding positional relationship with the first indicating member, and as the reel stand rotates, the first indicating member and the second indicating member sequentially correspond to the detecting means. and a locking means 24 for automatically fixing the tape reel to the reel stand at a position where the first indicating member again corresponds to the detecting means, the first and second indicating members are detected by the detection means to confirm that the tape reel is placed on the reel stand and that the protect ring is attached to the placed tape reel, The present invention provides a magnetic tape drive device, wherein completion of fixing of the tape reel to the reel stand is confirmed by detecting the first indicating member again with the detection means. .

(Function) The magnetic tape drive device configured as described above is provided with indicating members 21 and 22 on the reel stand 20, which are displaced by the tape reel 2 placed thereon or the protect ring 2a attached to the tape reel 2. As the reel stand 20 rotates, these indicating members 21 and 22 are made to correspond to the detection means 23 in sequence, thereby determining whether or not the tape reel 2 has been placed on the reel stand 20 by one of the detection means 23. and protect ring 2 on the tape reel 2 placed on it.
It is possible to detect and confirm whether or not a is attached.

Further, the fixing of the tape reel 2 to the reel stand 20 by the locking means 24 is performed by the first instruction member 2.
1 is completed at a position corresponding to the detection means 23 again, the tape reel 2 is fixed to the reel stand 20 by the detection means 23 detecting the first indicating member 21 again. You can confirm that

As described above, according to the present invention, one detection means 23
The above three points can be confirmed by the following.

(Embodiment) Hereinafter, a preferred embodiment of the magnetic tape drive device according to the present invention will be described in detail with reference to FIGS. 1 to 5.

In this embodiment, the present invention is applied to a magnetic tape drive device as shown in FIG. 6, and only the main parts thereof will be explained below.

As shown in FIGS. 1 to 5, the reel stand 20 according to this embodiment has a rotating shaft 2 of a motor (not shown).
5, and a lower plate 27, which is integrally attached to the lower surface of the rotor 26 and on which the tape reel 2 is placed. It is configured with.

Further, on the lower surface of the lower plate 27, a plate-shaped first indicating member 21 and a second indicating member 22 are attached with their proximal end sides separated from each other by an angle of 90 degrees. , 22 are elastically displaceable in the axial direction of the reel stand 20.

In this embodiment, the distal end side of the first indicating member 21 is bent as shown in FIG. 2, and a reflective surface 21a is formed on the front surface thereof, and the upper surface has a width for detecting the presence or absence of the tape reel 2. A tape reel detection surface 21b is formed with a wide tape reel detection surface 21b.

Similarly, the distal end side of the second indicating member 22 is bent as shown in FIG.
2a is formed, and a narrow protect ring detection surface 22b for detecting the presence or absence of the protect ring 2a is formed on the upper surface.

In addition, each detection surface 2 of these indicating members 21 and 22
1b, 22b and the reflective surfaces 21a, 22b always protrude from the upper surface of the lower plate 27 through the notches 27a, 27b of the lower plate 27. The reflective surface 21a is elastically displaced downward in the axial direction when the tape reel 2 is placed on the lower plate 27, and the protect ring detection surface 22b and the reflective surface 21a of the second indicating member 22 are attached to the placed tape reel 2. The protect ring 2a is elastically displaced downward in the axial direction.

Note that if the protect ring 2a is not attached to the mounted tape reel 2, the protect ring detection surface 22b and reflective surface 22a will enter the groove 2c in which the protect ring 2a is attached and will not be elastically displaced. In this case, the magnetic tape drive device is set to a non-recordable state.

Further, the reflective surface 22a of the second indicating member 22
As shown in FIG. It is now possible to obtain a reflective state.

On the other hand, this magnetic tape drive device is provided with one optical sensor 23, which is a detection means in the present invention, and this optical sensor 23 is connected to the reflective surface 21 of each of the indicating members 21 and 22 which is elastically displaced downward in the axial direction.
It is fixed at a height position opposite to a and 22a.

The optical sensor 23 is composed of a light emitting element and a light receiving element, and the light emitted from the light emitting element is reflected by each of the reflecting surfaces 21a and 22a and detected by the light receiving element. Face 21
a, 22a are displaced downward in the axial direction, that is, whether the tape reel 2 is placed or the protect ring 2a is attached.

Further, this magnetic tape drive device uses the rotation of the reel stand 20 to move the first instruction member 2
The tape reel 2 is provided with a locking means 24 that completes fixing the tape reel 2 to the reel stand 20 at a position where the reflective surface 21a of the tape reel 2 is detected by the optical sensor 23 from the second time onwards.

That is, in this embodiment, this locking means 2
A cylindrical cam 30 is fitted onto the center boss portion 26b of the rotary body 26 and is slidably inserted in the circumferential direction thereof, and a cylindrical cam 30 is fitted onto the outer peripheral support portion 26c of the rotary body 26. The elastic ring 31 moves together with the rotating body 26 while being guided by the thick part of the outer peripheral support portion 26c of the rotating body 26, and rolls into contact with the outer peripheral cam surface of the cylindrical cam 30 in the radial direction of the reel stand 20. The cylindrical cam 30 is moved by the roller 32 which is moved in the radial direction, the bit 33 which expands the diameter of the elastic ring 31 by the movement of the roller 32 in the radial direction, and the plunger 35 connected by the ring 34. It is composed of a lock pin 36 that restricts the rotation of the shaft.

Further, a guide groove 30a is formed on the upper surface of the cylindrical cam 30 over an angular range of 60°,
The cylindrical cam 30 and the rotating body 26 are connected by engaging the stud 26a hanging from the rotating body 26 with this guide groove 30a.
The rotation range of the rotating body 26 with respect to the cylindrical cam 30 is restricted.

Furthermore, a rotation regulating groove 30b is formed in the side surface of the cylindrical cam 30 over an angular range of 30 degrees, and the lock pin 36 is formed in this rotation regulating groove 30b.
By engaging the cylindrical cam 30, the rotation range of the cylindrical cam 30 is restricted.

In addition, the guide groove 30a and the rotation regulating groove 30b
The positional relationship between the center of the lock pin 36 and the stud that abuts the side wall of the guide groove 30a is such that when the lock pin 36 abuts against the side wall of the rotation regulating groove 30b and the rotation of the cylindrical cam 30 is restricted, the center of the lock pin 36 and the stud that abut the side wall of the guide groove 30a 26a are located at angular positions of 90° from each other.

Further, the plunger 35 is turned on when both the reflective surfaces 21a and 22a of the instruction members 21 and 22 are detected by the optical sensor 23, or when the reel stand 20 rotates once, and the plunger 35 is turned on to lock the lock pin 36 into the cylinder. It is adapted to come into contact with the outer periphery of the cam 30.

Next, the operation of the magnetic tape drive device configured as described above will be explained.

First, after the tape reel 2 is placed on the reel stand 20, the reel stand 20 is rotated counterclockwise in FIG.

When the tape reel 2 is placed on the reel stand 20, the first instruction member 21 is elastically displaced downward in the axial direction, and when the protect ring 2 is attached to the tape reel 2, the first instruction member 21 is elastically displaced downward in the axial direction. The second indicating member 22 is also elastically displaced downward in the axial direction.

Therefore, by rotating the reel stand 20 in this state, the reflective surfaces 21a, 22a of the respective indicating members 21, 22 face the optical sensor 23 in sequence, and the indicating members 21, 22 are elastically displaced downward in the axial direction. It is detected that the tape reel 2 is placed on the reel stand 20 and that the protect ring 2a is attached.

Note that the reflective surface 21a of the first indicating member 21
Depending on the reflective surface 22a of the second indicating member 22, two successive pulses with a narrow pulse width may be obtained as the detection output. It is possible to immediately and automatically determine which reflective surface of the indicating member the detection output detects.

Further, the optical sensor 23 is connected to the first instruction member 21
If not detected, it is determined that the tape reel 2 is not placed, and the rotation of the reel stand 20 is stopped.

Furthermore, the optical sensor 23 is connected to the second support member 2
If 2 is not detected, the magnetic tape drive is set to a non-recordable state.

Next, as described above, each of the first and second instruction members 2
1 or 22 or when the reel stand 20 rotates once, the plunger 35 is turned on and the lock pin 36 comes into contact with the outer periphery of the cylindrical cam 30.

When the reel stand 20 continues to rotate counterclockwise in this state, the lock pin 36 is inserted into the rotation regulating groove 30b formed on the outer periphery of the cylindrical cam 30.
When the lock pin 36 is engaged with the lock pin 36 as shown in FIG.
comes into contact with one side wall of the rotation regulating groove 30b.

As a result, the cylindrical cam 30 is stopped in the state shown in FIG. 4.

Further, a guide groove 30a formed on the upper surface of this cylindrical cam 30 is provided with a rotating body 26 of the reel stand 20.
Since the stud 26a formed in the
6a comes into contact with one side wall of the guide groove 30a, and the reel stand 20 is also stopped.

In this embodiment, the cylindrical cam 30 and the reel stand 20 are stopped at a position where the center of the first instruction member 21 and the center of the lock pin 36 coincide with each other as shown in FIG. This is the position where the reflective surface 22a of the indicating member 22 faces the optical sensor 23.

Next, the reel stand 20 is reversed and rotated clockwise (tape feeding direction).

As a result, the cylindrical cam 3 as shown in FIG.
0 rotates by the length of the rotation restriction groove 30b formed over an angular range of 30 degrees, and then the lock pin 3 is attached to the other side wall of the rotation restriction groove 30b.
6 comes into contact and the rotation is stopped again.

Further, after the reel stand 20 rotates more than the cylindrical cam 30 by the length of the guide groove 30a formed over an angular range of 60°, Stud 2
6a comes into contact and the rotation is stopped again.

In this way, the reel stand 20 is rotated over an angular range of 90° (30° + 60°) after the rotation in the counterclockwise direction is stopped and the rotation in the clockwise direction is started. As a result, as shown in FIG. 5, the reflective surface 21a of the first indicating member 21 is stopped at a position facing the optical sensor 23 again.

On the other hand, after the rotation of the cylindrical cam 30 is restricted by the lock pin 36, only the reel stand 20 rotates, so that the roller 32 rolls into contact with the cam surface of the cylindrical cam 30.

Here, this cam surface is formed to gradually move the roller 32 in the outer diameter direction of the reel stand 20, and when the reel stand 20 is rotated about 50 degrees after the cylindrical cam 30 is stopped, Then, the roller 32 is moved to the outermost direction, and when the roller 32 is rotated by 60 degrees, the bit 33 expands the diameter of the elastic ring 31 and brings it into pressure contact with the inner wall of the center hole 2b of the tape reel 2.

Therefore, the reflective surface 21 of the first indicating member 21
The tape reel 2 is securely fixed to the reel stand 20 at the position where a faces the optical sensor 23, and the maximum diameter of the cylindrical cam 30 is at a position about 10 degrees back from this state as described above. Therefore, it is self-locked.

Therefore, when the reflective surface 21a of the first indicating member 21 is detected again by the optical sensor 23, the fixing of the tape reel 2 to the reel stand 20 is completed, and the optical sensor 23 By detecting the first indicating member 21 again, it is possible to confirm that the tape reel 2 is fixed to the reel stand 20.

Note that if the tape reel 2 is not securely fixed to the reel stand 20 due to insufficient rotational force of the reel stand 20, the reflective surface 2 of the first indicating member 21
Since the reflective surface 21a has not yet reached the position facing the optical sensor 23, the reflective surface 21a cannot be detected again.
to ensure that it is not fixed.

Thereafter, the plunger 35 is turned off and the lock pin 36 is separated from the outer periphery of the cylindrical cam 30, so that the reel stand 20 can freely rotate.

In this case, since the bit 33 is self-locked, the reel stand 2 of the tape reel 2
The fixed state to 0 will not be released inadvertently.

As described above, according to the magnetic tape drive device of this embodiment, one optical sensor 23 detects whether or not the tape reel 2 is placed on the reel stand 20. It is possible to detect whether the protect ring 2a is attached or not and whether the tape reel 2 is securely fixed to the reel stand 20.

Furthermore, in this embodiment, when the tape reel 2 is released from the reel stand 20,
Since each of the above-mentioned indicating members 21 and 22 are located on the opposite side of the tape reel insertion opening of the device, it is possible to prevent the indicating members 21 and 22 from being damaged by the tape reel 2 when inserting the tape reel 2 again. This can be prevented.

In this embodiment, the optical sensor 23 is used as a detection means, but this detection means may be used to detect the pointing members 21, 22 by contact, for example.
It may be something that detects.

(Effect of the invention) As is clear from the above description, the present invention provides two indicating members on the reel stand on which the tape reel is placed, and detects the axial position of these indicating members using one detection means. By doing so, it is possible to check whether a tape reel is placed on the reel stand and whether a protect ring is attached to the placed tape reel.

Further, by providing a locking means that completes fixing of the tape reel to the reel stand when the first indicating member is detected again by the detection means, the tape reel is reeled according to the detection result by the detection means. You can check whether it is fixed to the stand or not.

That is, the tape reel placement detection function detects whether or not the tape reel is placed on the reel stand by the first indicating member, and the protect ring is mounted by the second indicating member. The protection ring detection function detects whether the tape reel is placed on the tape reel by the first indicating member, and the locking means is automatically activated as the reel stand rotates. Operate, 1st
The tape reel lock detection function detects that the tape reel has been fixed to the reel stand by detecting the indicating member again by the detection means, and the tape reel lock detection function is provided.

As a result, in the present invention, in particular, by setting the above-mentioned tape reel placement detection function,
If you simply place the tape reel on the reel stand,
After detecting that a tape reel has been placed, the tape reel can be automatically fixed (locked) to the reel stand via a locking means, and thereby the magnetic tape drive device can be controlled remotely, for example. This brings about the unique effects of the present invention, such as making it possible.

Furthermore, by being equipped with three types of detection functions,
It is free from human error.

Further, the first and second indicating members attached to the reel stand adopt a structure using elastic displacement members that are elastically displaced in the direction of the rotation axis by the tape reel and the protect ring and correspond to the detection means. Therefore, the first and second indicating members have advantages such as a simple structure and a compact shape.

Furthermore, since the first and second indicating members attached to the reel stand are elastically displaced by the tape reel and the protect ring at different positions on substantially the same circumference of the reel stand, when corresponding to the detection means, Since the first and second indicating members do not overlap each other, and the detecting means is configured to generate different pulses, highly reliable detection can be performed.

As described above, according to the present invention, the above three points can be confirmed using one detection means.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the main parts of an embodiment of a magnetic tape drive device according to the present invention, in which A is a partially cutaway plan view and B is a half-sectional view taken along the - line in A. , FIG. 2 is an enlarged perspective view showing the first indicating member, FIG. 3 is an enlarged perspective view showing the second indicating member,
FIG. 4 is a diagram showing another state of the main part of the embodiment according to the present invention, where A is a partially cutaway plan view, B is a half sectional view taken along the - line in A, Figure C is a half-sectional view taken along the - line in Figure A;
FIG. 5 is a diagram similarly showing another state, and FIG.
6 is a partially cutaway plan view, B is a half-sectional view taken along the - line in A, C is a half-sectional view taken along the - line in A, and FIG. 6 is a general magnetic tape drive. FIG. 2 is a partially cutaway perspective view showing the device. 2... Tape reel, 2a... Protect ring, 20... Reel stand, 21... Instruction member, 21
a... Reflective surface, 21b... Tape reel detection surface,
22...Instruction member, 22a...Reflecting surface, 22b...
...Protect ring detection surface, 23...Detection means (optical sensor), 24...Lock means.

Claims (1)

[Claims for Utility Model Registration] A reel stand on which a tape reel is placed and rotationally driven by a rotating shaft; a detection means fixedly installed apart from the reel stand; The tape reel is mounted so as to be elastically displaceable in the direction of the rotation axis, and when the tape reel is placed on the reel stand, it is elastically displaced in the direction of the rotation axis by the reel stand at a predetermined position on the reel stand to detect the detection. while being kept in a position corresponding to the means;
a first indicator member that generates a pulse from the detection means as the reel stand rotates; When a protect ring is attached to the lower surface of the tape reel, the tape reel is elastically displaced in the direction of the rotational axis by the protect ring at a different position on the same circumference as the predetermined position to a position corresponding to the detection means. and a second indicating member that generates a pulse different from the pulse of the first indicating member from the detection means as the reel stand rotates, and maintaining a corresponding positional relationship with the first indicating member. After the first indicating member and the second indicating member sequentially correspond to the detecting means as the reel stand rotates, the first indicating member corresponds to the detecting means. a locking means that automatically fixes the tape reel to the reel stand at a corresponding position again, and the tape reel is locked by detecting the first and second indicating members with the detection means, respectively. While confirming that the tape reel is placed on the stand and that the protect ring is attached to the placed tape reel, the first indicating member is detected again by the detection means. A magnetic tape drive apparatus characterized in that the tape reel is confirmed to be completely fixed to the reel stand.