JPH08195004A - Magnetic tape device - Google Patents

Abstract

PURPOSE: To improve the durability of a gear motor and a gear for moving a picker. CONSTITUTION: A magnetic tape 2 is pulled out from a cartridge 1 by engaging a picker 5 with a reader block 3 and the picker 5 is carried to a winding reel 21 for winding the magnetic tape 2 along a threading cam 10 together with the reader block 3. A gear 24 is attached to a link 8 for rotating the picker 5. gears 13 and 14 rotate in accordance with the revolution of a gear motor 12, but the gear 24 does not rotate due to a large frictional force with the link 8 and only the link 8 is rotated, to move the picker 5 to the end part 11b. When the picker 5 reaches the end part 11b, the gear 24 is caused to rotate against the large frictional force with the link 8, thereby applying no load to the gear motor 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape device provided with a threading mechanism for pulling out a magnetic tape having a leader block at its tip from a supply reel and winding it around a take-up reel.

[0002]

2. Description of the Related Art There is a magnetic tape device in which a magnetic tape having a leader block at its tip is housed in a cartridge, and by mounting the cartridge, the magnetic tape is pulled out from the cartridge to record information and the like. This type of magnetic tape device is equipped with a threading mechanism in which a picker is engaged with a leader block to pull out a magnetic tape from a supply reel and wind it around a take-up reel.

FIG. 3 is a perspective view showing an example of a conventional magnetic tape device. In FIG. 3, a cartridge 1 stores a magnetic tape 2 wound around a file reel (not shown) which is a supply reel. A magnetic tape 2 is attached to the tip of the magnetic tape 2 by a threading mechanism described later.
A leader block 3 is provided for pulling the cartridge out of the cartridge 1. Magnetic tape 2 cartridge 1
The picker 5 for further pulling out is provided in a portion where the leader block 3 is located when the cartridge 1 is mounted at a predetermined position on the base plate 100. File reel of cartridge 1 is base plate 100
When the cartridge 1 is mounted on the base plate 100 so as to be mounted on the file reel motor 4 provided in
The lower end of the picker 5 engages with the groove 3a of the leader block 3 as shown in FIG. 4 (B). Note that FIG. 4 (A)
Shows the state before the cartridge 1 is mounted on the base plate 100.

A pulley 6 is provided on the upper end portion of the picker 5, and the pulley 6 is engaged with one end portion 11a of a cam guide 11 formed on the outer peripheral portion of the threading cam 10. The picker 5 is connected to the link 7,
The link 7 is connected to the link 8 via a link shaft 9. When the gear motor 12 rotates, this gear motor 1
The gear 13 connected to 2 rotates, and the gear 14 meshed with the gear 13 also rotates. Since the gear 14 is engaged with the link 8 described above, when the gear motor 12 rotates, the link 8 is rotated and the link 8 is provided at the eccentric position.
It rotates about 5 and the link 7 also rotates. When the picker 5 engages with the leader block 3, the link 7 is rotated by the rotation of the gear motor 12 as described above,
The magnetic tape 2 is pulled out by transporting the pulley 6 along the cam guide 11 to the other end 11b of the cam guide 11. At this time, the magnetic tape 2 is conveyed along the tape guides 16 to 19 and the magnetic head 20.

When the magnetic tape 2 is conveyed to the end portion 11b which is the end of the threading cam 10 (cam guide 11), the picker 5 together with the leader block 3 in the reel groove 22 of the machine reel 21 which is a take-up reel. It is stored. The picker 5 is the machine reel 2
1, the leader block 3 rotates / stops depending on the rotation / stop of the machine reel 21. As can be seen from the above description, the picker 5 and the mechanism that conveys the picker 5 to the reel groove 22 of the machine reel 21 are threading mechanisms.

[0006]

By the way, when the magnetic tape 2 is conveyed to the machine reel 21 and when the magnetic tape 2 conveyed to the machine reel 21 is returned to the cartridge 1, the picker 5 and the pulley 6 are cam guides. Since the position is fixed at both ends 11a and 11b of 11, the gear motor 12 does not move any more, but the gear motor 12 tries to continue rotating. At this time, the gear motor 12 and the gear 1
There is a problem in that a large load is applied to 3 and 14 and durability is affected. This leads to problems such as damage to the gears 13 and 14.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a gear motor for moving a picker and a magnetic tape device capable of improving the durability of the gear.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a cartridge for accommodating a magnetic tape having a leader block at its tip, and one end of a threading cam on the leader block. Part of the magnetic tape is pulled out from the cartridge by engaging a picker located on the other side, and the picker is conveyed together with the leader block to a take-up reel for winding the magnetic tape located on the other end of the threading cam. A threading mechanism for storing the magnetic tape in the cartridge by returning the conveyed picker to the one end of the threading cam, and a drive mechanism including a motor for driving the threading mechanism. In the magnetic tape device, the picker After being transported by the threading mechanism and positioned at the one end or the other end of the threading cam, a magnetic buffer is provided to reduce the load on the motor of the drive mechanism. A tape device is provided.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic tape device according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a magnetic tape device of the present invention, and FIG. 2 is a partial perspective view showing a main part of the magnetic tape device of the present invention. In FIG. 1, the same parts as those in FIG. 3 are designated by the same reference numerals.

In FIG. 1, a cartridge 1 stores a magnetic tape 2 wound around a file reel (not shown) which is a supply reel. At the tip of the magnetic tape 2,
A leader block 3 for pulling the magnetic tape 2 out of the cartridge 1 by a threading mechanism described later is provided. The picker 5 for pulling out the magnetic tape 2 from the cartridge 1 is provided in a portion where the leader block 3 is located when the cartridge 1 is mounted at a predetermined position on the base plate 100. When the cartridge 1 is mounted on the base plate 100 such that the file reel of the cartridge 1 is mounted on the file reel motor 4 provided on the base plate 100, the lower end portion of the picker 5 is a leader as shown in FIG. 4 (B). It engages with the groove 3 a of the block 3. Note that FIG. 4A shows a state before the cartridge 1 is mounted on the base plate 100.

A pulley 6 is provided at the upper end of the picker 5, and the pulley 6 is engaged with one end 11a of a cam guide 11 formed on the outer periphery of the threading cam 10. As shown in FIG. 2, the picker 5
Is connected to a link 7, and this link 7 has a link shaft 9
Is connected to the link 8 via. A gear 24 is attached to a gear shaft 25 of the link 8. The frictional force between the link 8 and the gear 24 is set to an appropriately large value. The gear 24 meshes with the gear 14, and further, the gear 1
Reference numeral 4 meshes with the gear 13.

When the gear motor 12 rotates, the gear 13 connected to the gear motor 12 also rotates, and further,
The gear 14 also rotates, but the gear 24 does not rotate due to a large frictional force between the gear 8 and the link 8, and the link 8 rotates about a rotation shaft 15 provided at an eccentric position, and the link 7 also rotates. To do. When the picker 5 engages with the leader block 3, the link 7 is rotated by the rotation of the gear motor 12 as described above, and the pulley 6 is conveyed along the cam guide 11 to the other end 11b of the cam guide 11. As a result, the magnetic tape 2 is pulled out. At this time, the magnetic tape 2 is attached to the tape guides 16 to 19 and the magnetic head 20.
Is transported along.

When the picker 5 and the pulley 6 reach the end portion 11b which is the end of the threading cam 10 (cam guide 11) and the magnetic tape 2 is conveyed to the end portion 11b, the picker 5 takes up the take-up reel. It is stored together with the leader block 3 in the reel groove 22 of the machine reel 21. The picker 5 is fixed to the central axis position of the machine reel 21, and the leader block 3 rotates / stops depending on the rotation / stop of the machine reel 21.
At this time, even if the gear motor 12 continues to rotate further, the picker 5 and the pulley 6 will not move to the end portion 1 of the cam guide 11.
Since the position is fixed at 1b and does not move any further, the link 8 stops rotating and the gear 24 starts to rotate against a large frictional force with the link 8.

On the contrary, even when the magnetic tape 2 is returned to the cartridge 1, the picker 5 and the pulley 6 have the cam guide 1
Since the position is fixed at the end portion 11a of No. 1 and does not move further, the link 8 stops rotating, and the gear 24 starts to rotate against a large frictional force with the link 8. As a result, the gear motor 12 and the gears 13 and 14 continue to rotate without applying a large load. Therefore, according to the present invention, the durability of the gear motor 12 and the gears 13 and 14 can be improved, and problems such as damage to the gears 13 and 14 can be favorably resolved.

[0015]

As described above in detail, in the magnetic tape device of the present invention, after the picker is conveyed by the threading mechanism and positioned at one end or the other end of the threading cam, the motor of the drive mechanism is moved. Since the buffer means for reducing the load applied to the motor is provided, a large load is not applied to the motor and the gear meshed with the motor, so that the durability of the motor and the gear can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a partial perspective view showing a main part of the present invention.

FIG. 3 is a perspective view showing a conventional example.

FIG. 4 is a partial perspective view for explaining the operation of FIGS. 1 and 3.

[Explanation of symbols]

 1 Cartridge 2 Magnetic Tape 3 Leader Block 5 Picker 6 Pulley 7, 8 Link 10 Threading Cam 11 Cam Guide 11a End (One End) 11b End (Other End) 12 Gear Motor 13, 14 Gear 21 Machine Reel ( Take-up reel) 24 gear (buffer means) 25 gear shaft

Claims (1)

[Claims] 1. A cartridge for accommodating a magnetic tape having a leader block at its tip and a picker located at one end of a threading cam are engaged with the leader block to pull out the magnetic tape from the cartridge, Carrying the picker together with a leader block to a take-up reel for winding the magnetic tape located at the other end of the threading cam, and returning the carried picker to the one end of the threading cam. In a magnetic tape device comprising a threading mechanism for storing the magnetic tape in the cartridge by means of a drive mechanism including a motor for driving the threading mechanism, the picker is conveyed by the threading mechanism and the threading mechanism Magnetic tape apparatus of the after located at the end of the one end or the other, characterized in that a damping means to reduce the load applied to the motor of the drive mechanism.