JP2995588B2 - Magnetic tape cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape cartridge used for a magnetic tape device used as, for example, an external storage device of a computer system, and more particularly, to a magnetic tape cartridge having a magnetic tape cartridge. When the threading device constituting the magnetic tape device is automatically wound around a machine reel on the magnetic tape device side, a threader pin of the threading device hooks a leader block fixed to the leading end of the magnetic tape, and is moved toward the machine reel. When transporting and locking this to the machine reel, or removing the leader block from the machine reel, reduce the stress on the fixed portion of the magnetic tape to the leader block, cut the magnetic tape, etc. The present invention relates to a magnetic tape cartridge that eliminates the problem.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view of a conventional magnetic tape cartridge, and a magnetic tape device for reading / writing by loading the magnetic tape cartridge is shown in FIG. A threading device is provided for automatically winding the magnetic tape 3 in the cartridge case 2 of the cartridge 1 around a machine reel on the magnetic tape device side. The magnetic tape 3
A leader block 4 is fixed to the leading end of the threading device, and a hook 7 of the leader block 4 is hooked by a threader pin provided at a leading end of a thread arm of a threading device, and is conveyed. The hook 7 of the block 4 is engaged with the machine reel of the magnetic tape device. The magnetic tape is read / written with a magnetic head while the magnetic tape 3 is wound around the machine reel by rotating the machine reel with a motor.

[0003]

SUMMARY OF THE INVENTION A conventional magnetic tape car
In the cartridge 1, when the magnetic tape 3 in the cartridge case 2 is automatically wound around a machine reel by a threading device constituting a magnetic tape device, a leader block 4 fixed to the leading end of the magnetic tape 3 is used. Is transported by being hooked by a threader pin of a threading device, and the leader block 4 is locked on a machine reel of a magnetic tape device to rotate the machine reel, and the magnetic tape is wound around the machine reel. At the beginning of the operation, a large stress is applied to the fixing portion of the magnetic tape 3 to the leader block 4. That is, the magnetic tape
When threading the tape 3 so as not to slack, or when winding the magnetic tape 3 by rotating the machine reel with a motor after locking the leader block 4 to the machine reel. Then, a large tension is applied to the magnetic tape 3 to cause stress.

Also, when the magnetic tape 3 is wound and stored in the cartridge case 2 of the magnetic tape cartridge 1 after the read / write operation is completed, the magnetic tape 3 may be wound around the tip of the magnetic tape 3. Immediately before the fixed leader block 4 comes off the machine reel, an excessive stress is applied to the fixed portion of the magnetic tape 3 with the leader block 4. Due to this stress, the fixing portion of the magnetic tape 3 to the leader block 4 is broken, and the magnetic tape 3 is connected to the leader block 4 and repaired.
In this magnetic tape cartridge 1, there is a problem that read / write cannot be performed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to reduce the magnetic tape when starting to wind a magnetic tape around a machine reel of a magnetic tape device and starting to remove the magnetic tape from the machine reel. It is an object of the present invention to provide a magnetic tape cartridge which can prevent a magnetic tape from being cut by extending a stress applied to a tip portion of the tape which comes into contact with a leader block, thereby extending a life. .

[0006]

According to the present invention, in order to achieve the above object, a cartridge case 2 and one end thereof are provided.
The cartridge locked to the winding shaft of the cartridge case 2
A magnetic tape 3 wound and housed in a cartridge case 2;
The magnetic tape 3 is fixed to the tip of the magnetic tape 3 and
Leader block 4 to be locked to the machine reel of the tape device
A magnetic tape cartridge having:
The double lock 4 is buffered at the portion where it contacts the magnetic tape 3.
The magnetic tape cartridge is provided with a material 5 . Further, the tip portion 3a of the magnetic tape 3 which comes into contact with the leader block 4 is a magnetic tape cartridge which is thicker than other portions .

[0007]

The magnetic tape cartridge 1 of the present invention is constructed as described above. That is, the magnetic tape cartridge 1 is provided with a cushioning material 5 at the portion of the leader block 4 which contacts the magnetic tape 3. Therefore, the leader block 4 fixed to the leading end of the magnetic tape 3 is conveyed by being hooked on a threader pin of a threading device, and the magnetic tape 3 is locked on a machine reel of the magnetic tape device. When starting to wind and when starting to remove the leading block 4 of the magnetic tape 3 from the machine reel, the stress applied to the magnetic tape 3 can be reduced, and the magnetic tape can be prevented from being cut. In addition, since the tip 3a of the magnetic tape 3 which is in contact with the leader block 4 is made thicker instead of the cushioning material 5, even if the stress applied to the tip 3a is large, the magnetic tape can be cut. Can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the first and second aspects of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a perspective view showing an embodiment of a magnetic tape cartridge according to the first invention. The magnetic tape cartridge 1 includes a cartridge case 2, a magnetic tape 3 wound and housed in the cartridge case 2, and a fixing pin 6 at the tip of the magnetic tape 3. And a leader block 4 which is fixed by the following. The base end of the magnetic tape 3 is locked on a reel (not shown) provided in the cartridge case 2 and wound around the reel. A reel fixed to the end of the magnetic tape 3
The hook portion 7 of the double block 4 is hooked by a threader pin of a threading device constituting a magnetic tape device to be described later, is conveyed to the machine reel side, and the hook portion 7 of the leader block 4 is locked to the machine reel. Is done. Then, the machine reel is rotated, and the magnetic tape 3 is wound therearound.

In the magnetic tape cartridge 1 of the present invention, the leader block 4 is devised so that
A leading end portion of the magnetic tape 3 which comes into contact with the leader block 4 when starting to wind the magnetic tape around the machine reel of the magnetic tape device and when starting to remove the magnetic tape from the machine reel. To relieve stress. FIGS. 2A, 2B and 2C show a magnetic tape car of the first invention.
FIG. 3 is a view showing each embodiment of a main part of the cartridge, that is, a detailed view of a leader block 4 fixed to a leading end of a magnetic tape 3. As shown in FIG. 2 (a), the leader block 4 has a magnetic tape 3 of the leader block 4.
The cushioning material 5 is provided in a portion that comes into contact with the cushioning member.

The cushioning member 5 is made of, for example, urethane. The cushioning member 5 is provided at a corner portion of the leader block 4 which comes into contact with the magnetic tape 3 fixed at its tip by a fixing pin 6. The tape attached to the tip of the magnetic tape 3
The hook portion 7 of the double lock 4 is hooked by the threader pin of the threading device, is conveyed to the machine reel side of the magnetic tape device, is locked by the machine reel, and starts winding the magnetic tape 3 around the machine reel. When the magnetic tape 3 is started to be removed from the machine reel, the buffer member 5 relieves the stress applied to the magnetic tape 3.
The cushioning member 5 has a columnar shape with a substantially circular cross section, and is fixed to a corner portion of the leader block 4 which comes into contact with the magnetic tape 3 with an adhesive or the like.

As another example of a means for fixing the cushioning material 5 to the portion of the leader block 4 which comes into contact with the magnetic tape 3, as shown in FIG. A columnar projection 5 having a cross-section of “Ω” and
a on the other hand, an inverted ".OMEGA."-shaped concave groove 4a, into which the protrusion 5a is fitted, is formed in the bonding portion of the leader block 4, and the protrusion formed on the cushioning material 5 is formed in the concave groove 4a. 5a is fitted to fix the cushioning material 5 to the lead block 4. As shown in FIG. 2 (c), a hollow 4b is formed inside the portion of the synthetic resin leader block 4 which comes into contact with the magnetic tape 3, as shown in FIG. By making the portion in contact with the magnetic tape 3 thinner to have a spring property, the magnetic tape is provided with a buffering effect in the same manner as described above.

FIG. 3 is a top view of a threading device for automatically winding the magnetic tape of the magnetic tape cartridge of the present invention on a machine reel of a magnetic tape device, and FIG. 4 (a) is a thread of FIG. FIG. 4B is a view showing the front end of the arm as viewed from the front, and FIG. 4B is a view showing in detail a machine reel portion shown in FIG. The threading device comprises a threaded arm 10a-10d assembled in a link shape and a cam 1 for guiding and rotating the threaded arm 10a-10d.
1 and a machine reel 12 for winding the magnetic tape 3 drawn from the magnetic tape cartridge 1.

At the tip of the thread arm 10a, a threader pin 13 as shown in FIG. 4A is provided vertically downward. At the lower end of the threader pin 13, there is a lead for locking the hook 7 of the leader block 4 fixed to the tip of the magnetic tape 3 of the magnetic tape cartridge 1.
A double lock 13a is provided. The thread arm 10b is fixed to a rotating shaft 14 provided so as to be rotatable with respect to the fixed cam 11. The thread arm 10b rotates clockwise or counterclockwise with the rotation of the rotating shaft 14. I do.

A cam 1 is provided on the lower surface of the thread arm 10c.
A projection 15 is provided which is fitted into the first cam groove 11a and slides. Also, thread arms 10a, 10b,
10c and 10d are rotatably stopped at four places by pins 16 and are assembled in a link shape. Cam 1
1, a threader pin 13 provided at the tip of a thread arm 10a hooks a transporter 4 on a leader block 4 fixed to the tip of the magnetic tape 3 to transport the same. It is designed to stop and is shaped like a cloud. Therefore, with the rotation of the rotating shaft 14 in the counterclockwise direction, the projection 15 provided on the sled arm 10c rotatably connected to the sled arm 10b slides along the cam groove 11a. The threader pin 13 provided at the tip of the thread arm 10a rotatably connected to the tip of the thread arm 10b, 10c by a pin 16 moves along a path shown by a broken line 17, and the threader pin 10 moves. A leader block 4 fixed to the end of the magnetic tape 3 of the magnetic tape cartridge 1 locked to
Along the same path.

Then, the magnetic tape 3 having the leading end attached to the leader block 4 is routed to the tape guides 19, 19, the magnetic head 20, and the guide pole 21 along a path indicated by a broken line 18. As shown in FIG. 4B, the machine reel 12 is provided with a notch 12b and a rotary support shaft 12c in a hub 12a thereof.
The leader block 4 and the hooking portion 7 which are hooked and conveyed by the threader pin 13 provided at the end of the thread arm 10a are locked by the notch 12b and the rotating shaft 12c. Then, after being locked, the machine reel 12 rotates, and the magnetic tape 3 is wound around the machine reel 12 to perform reading / writing by the magnetic head 20.

Next, the operation of the threading device for automatically winding the magnetic tape 3 of the magnetic tape cartridge 1 around the machine reel 12 of the magnetic tape device will be described with reference to FIGS. I do. First, the magnetic tape cartridge 1
Is set to the position shown in FIG. At this time, the threader pin 13 is in the threaded portion 7 of the leader block 4. And a magnetic tape cartridge 1
Is lowered in the direction perpendicular to the plane of FIG.
Is securely locked to the threaded pin hooking portion 7 formed on the leader block 4. When the rotation shaft 14 rotates in the counterclockwise direction, the protrusion 15 provided on the thread arm 10c moves to the cam groove 11a.
, And the leader block 4 is transported along a path indicated by a broken line 17.

The leader block 4 is locked in the notch 12b of the hub 12a of the machine reel 12, and the magnetic tape 3 is strongly stretched so that the tape guides 19, 19, the magnetic head 20 and the guide are provided. It comes into contact with the pole 21 and is wound around the machine reel 12 as shown by the broken line 18. At this time, a large stress is applied to the fixing portion of the magnetic tape 3 fixed to the leader block 4, but the magnetic tape 3 of the leader block 4 comes into contact as in the present invention. By providing the cushioning material 5 at the position, the stress on the magnetic tape 3 can be reduced.

FIG. 5 is a diagram showing in detail a main part of an embodiment of the magnetic tape cartridge according to the second invention. This Lee
The tip of the magnetic tape 3 which comes into contact with the leader block 4 of the magnetic tape 3 without providing the cushioning material 5 like the leader block 4 of the magnetic tape cartridge of the first invention. The part 3a is double-bonded and adhered, and the doubled tip part 3
a is fixed to the fixing portion 4c of the leader block 4 by the fixing pin 6. Because of this, the strength of the tip portion 3a of the magnetic tape where stress is applied most increases, and the tape can be prevented from being cut.

[0019]

As described above, according to the magnetic tape cartridge of the present invention, the cushioning material is provided at the portion of the leader block which comes into contact with the magnetic tape, so that the machine tape of the magnetic tape device can be used. Start winding magnetic tape around the tape, or
When the magnetic tape is started to be removed from the machine reel, stress applied to the fixed portion of the magnetic tape with the leader block can be reduced, so that the magnetic tape can be cut. Can be prevented. Also, by increasing the strength by increasing the thickness of the tip portion of the magnetic tape that contacts the leader block, it is possible to sufficiently withstand the stress applied to the tip portion of the magnetic tape that contacts the leader block. Thus, the magnetic tape can be prevented from being cut, and the life of the tape can be extended.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a magnetic tape cartridge according to the first invention.

FIG. 2 is a diagram showing in detail each embodiment of a leader block in the magnetic tape cartridge of the first invention.

FIG. 3 is a view showing a threading device for automatically winding a magnetic tape of a magnetic tape cartridge on a machine reel of a magnetic tape device.

FIG. 4 is a view showing in detail a tip portion of a thread arm and a machine reel of the threading device.

FIG. 5 is a diagram showing in detail a leader block portion in a magnetic tape cartridge according to an embodiment of the second invention.

FIG. 6 is a perspective view of a conventional magnetic tape cartridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic tape cartridge 2 Cartridge case 3 Magnetic tape 3a Double tip part 4 Leader block 4a Concave groove 4b Hollow-out hole 4c Fixed part 5 Buffer material 5a Projection part 6 Fixed pin 7 Hooked portion of threader pin 10a Thread arm 10b Thread arm 10c Thread arm 10d Thread arm 11 Cam 11a Cam groove 12 Machine reel 12a Hub 12b Notch 12c Rotating support shaft 13 Threader pin 13a Reeder block Locking part 14 Rotation axis 15 Projection part 16 Pin 17 Dashed line 18 Dashed line 19 Tape guide 20 Magnetic head 21 Guide pole

Claims (2)

(57) [Claims] A cartridge case and one end of said cartridge case.
The cartridge case is locked to the winding shaft of the ridge case.
The magnetic tape wound and stored in the space and the magnetic tape
This magnetic tape fixed to the tip is used as a magnetic tape device machine.
Magnetic tape having a leader block which is locked to a reel
In the cartridge, the leader block is a magnetic tape.
Characterized in that a cushioning material is provided at a portion in contact with the loop
Magnetic tape cartridge. 2. A cartridge case and one end of said cartridge case.
The cartridge case is locked to the winding shaft of the ridge case.
The magnetic tape wound and stored in the space and the magnetic tape
This magnetic tape fixed to the tip is used as a magnetic tape device machine.
Magnetic tape having a leader block which is locked to a reel
In the cartridge, the reader of the magnetic tape
Make the tip that contacts the block thicker than the rest
A magnetic tape cartridge which is characterized in that: