JP2001351235A - Magnetic transfer method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic transfer method and a device therefor which prevent vibrations generated on disks, when magnetic transfer is performed, while bringing a master disk and a slave disk into close contact with each other through vacuum suction and both of the disks are separated from the state of close contact by the supply of compressed air. SOLUTION: The magnetic transfer is performed, while bringing both of the disks into close contact, by opening a solenoid valve 21 for suction and vacuum-sucking the master disk 2 from the center hole 1a of the slave disk 1 which is held by a suction head 3. Thereafter, the solenoid valve 21 for suction is closed, and the compressed air is released from the center hole 1a of the slave disk 1, by opening a solenoid valve 22 for releasing. When a prescribed pressure for supplying compressed air is detected by a pressure switch 23 disposed in a path for supplying compressed air, a rectilinear advancing slider 6 is operated by a control part 25, and the master disk 2 and the slave disk 1 are separated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a magnetic transfer apparatus for transferring magnetic recording such as format information from a master disk to a magnetic disk used in a hard disk drive or a floppy (registered trademark) disk drive.

[0002]

2. Description of the Related Art With the advance of magnetic recording technology, magnetic recording devices have been increasing in capacity or miniaturization. Above all, there is a remarkable improvement in recording capacity by high-density recording of a hard disk device. The hard disk device includes a plurality of magnetic disks, a magnetic head corresponding to each magnetic disk, and an electronic circuit for recording and reproduction. In the manufacturing process of this hard disk device,
Magnetic signals such as format information and address information are written to the magnetic disk. This magnetic signal can be written using the write head of the hard disk device itself, but the magnetic signal can be collectively recorded on the hard disk by transfer using a master disk on which the magnetic signal has been recorded. Transfer is possible. FIG. 4 shows a conventional configuration of a magnetic transfer apparatus that transfers a magnetic signal from a master disk to a slave disk using the magnetic disk as a slave disk.

In FIG. 4, a holder 4 mounted on a linear slider 6 holds a master disk by vacuum suction through a suction port 4a. The suction head 3 holds the slave disk 1 by vacuum suction from the holding suction port 3 a and moves the slave disk 1 to a position facing the master disk 2. As shown in the timing chart of FIG. 5, when the holder 4 is moved forward by the rectilinear slider 6 to bring the master disk 2 into contact with the slave disk 1, the vacuum is drawn from the suction / exhaust port 3b provided in the suction head 3. When sucked, the vacuum suction force is applied from the center hole 1a of the slave disc 1 to the master disc 2
, The master disk 2 and the slave disk 1 come into close contact with each other. By maintaining this vacuum suction until the magnetic transfer by the application of an external magnetic field is completed, good magnetic transfer is performed in a close contact state. After this magnetic transfer is completed,
When the vacuum suction from the intake / exhaust port 3b is switched to the compressed air discharge, the compressed air released from the center hole 1a can enter between the slave disk 1 and the master disk 2 and be separated from the close contact state. Holder 4
Is moved backward to separate the master disk 2 from the slave disk 1.

[0004]

In the above-mentioned conventional structure, when the compressed air is released to separate the slave disk 1 and the master disk 2 from the close contact state, the air is released when the compressed air flows between the slave disk 1 and the master disk 2. Due to the Cherry effect, the compressed air becomes coarse and dense, and as shown in FIG. 5, a phenomenon occurs in which the disk vibrates, causing a problem that the master disk 2 is damaged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic transfer apparatus which prevents the occurrence of vibration when the master disk and the slave disk are separated from the close contact state.

[0006]

According to a first aspect of the present invention, a master disk having no hole at the center and a slave disk having a center hole at the center are brought into face-to-face contact with the master disk. In a magnetic transfer method of magnetically transferring recorded transfer information to a slave disk,
The slave disk is held by the slave disk holding means provided with a suction / exhaust port opened in the center hole while holding the slave disk and the master disk is brought into face-to-face contact with the slave disk. After performing magnetic transfer while the master disk is in close contact with the disk, the vacuum suction from the suction / exhaust port is switched to compressed air supply to release the close contact between the slave disk and the master disk, and the compressed air supply pressure exceeds a predetermined value. When the master disk is separated from the master disk, good magnetic transfer is performed in a state where the slave disk and the master disk are in close contact with each other by vacuum suction from the suction and exhaust ports. By releasing compressed air from the intake and exhaust ports, the slave disk and master disk It is possible to release the adhesion between.
The close contact by the supply of compressed air is released by gas entering between the slave disk and the master disk.However, if the flow rate of gas entering due to the increase of the supply pressure of compressed air increases, the disk vibrates. When the supply pressure reaches a predetermined value before vibration is generated, the slave disk and the master disk are separated from each other, so that generation of vibration can be prevented.

In the above magnetic transfer method, when the compressed air supply pressure exceeds a predetermined value, the supply of compressed air is stopped, so that the flow rate of gas entering between the slave disk and the master disk causes vibration of the disk. Stop the compressed air supply before the compressed air supply pressure becomes the flow rate,
Generation of vibration can be prevented.

Further, according to the second invention of the present application, a master disk having no hole at the center and a slave disk having a center hole at the center are brought into face-to-face contact with each other, and transfer information recorded on the master disk is magnetically transferred to the slave disk. Magnetic disk drive, a slave disk holding means for holding the slave disk and having an air intake / exhaust port opening in the center hole, a master disk holding means for holding the master disk, a master disk holding means, and a slave disk Advancing / retracting drive means for moving at least one of the holding means in a direction in which the master disk and the slave disk come into contact with each other; magnetic transfer means for magnetically transferring transfer information recorded on the master disk to the slave disk; Vacuum suction means for vacuum suction from Compressed air supply means for discharging compressed air from a port, pressure detection means for detecting compressed air supply pressure by the compressed air supply means, and the reciprocation in a direction in which the master disk and the slave disk are separated from each other based on pressure information from the pressure detection means. Control means for operating the driving means, wherein the slave disk and the master disk held by the slave disk holding means are brought into face-to-face contact with the advance / retreat driving means, and suction and exhaust are performed by the vacuum suction means. The master disk is brought into close contact with the slave disk by vacuum suction from the mouth, and after magnetic transfer is performed by the magnetic transfer means, the vacuum suction from the suction / exhaust port is switched to the pneumatic supply to switch between the slave disk and the master disk. Is released, and the pressure detection means reduces the air supply pressure to a predetermined value or less. When it became is detected, the control means separates the master disk and the slave disk to operate the reciprocating drive means. Good magnetic transfer is performed in a state where the slave disk and the master disk are in close contact by vacuum suction from the suction and exhaust ports, and the close contact between the slave disk and the master disk is released by discharging compressed air from the suction and exhaust ports after magnetic transfer can do. The close contact by the supply of compressed air is released by gas entering between the slave disk and the master disk.However, if the flow rate of gas entering due to the increase of the supply pressure of compressed air increases, the disk vibrates. When the supply pressure reaches a predetermined value before vibration is generated, the slave disk and the master disk are separated from each other, so that generation of vibration can be prevented.

In the above configuration, the control means controls the stop of the compressed air supply from the compressed air supply means based on the pressure information from the pressure detection means, thereby controlling the flow rate of the gas entering between the slave disk and the master disk. The supply of compressed air can be stopped before the pressure becomes the supply pressure of compressed air which causes the disk to vibrate, thereby preventing the occurrence of vibration.

Further, by providing a buffering means having a buffering effect in a direction facing the slave disk in the master disk holding means, the damper effect acts on the master disk holding means to suppress the generation of vibration.
Further, the buffer means can prevent the master disk from being damaged by an impact at the time of contact with the slave disk.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiment described below is an example embodying the present invention, and does not limit the technical scope of the present invention.

This embodiment shows a configuration in which a magnetic disk applied to a hard disk drive is used as a slave disk 1 and the transfer information is magnetically transferred from the master disk 2 on which the transfer information is recorded to the slave disk 1. Note that the same components as those in the conventional configuration are denoted by the same reference numerals.

In FIG. 1, a holder (master disk holding means) 4 attached to a linear slider (forward / backward driving means) 6 sucks and holds the master disk 2 by sucking vacuum from its suction port 4a. Also,
The slave disk 1 has a center hole 1a formed at the center thereof, and a suction head (slave disk holding means) 3 having a hollow portion 3c formed in the center hole 1a is vacuum-sucked from the suction suction port 3a. Is held by suction.

When the suction head 3 holding the slave disk 1 moves to a predetermined position where the slave disk 1 faces the master disk 2 as shown in FIG. 1, the rectilinear slider 6 causes the holder 4 to advance and move to the master position. The disk 2 is brought into face-to-face contact with the slave disk 1. As shown in the timing chart of FIG. 2, when the advance movement of the master disk 2 is completed and the master disk 2 comes into contact with the slave disk 1, the suction electromagnetic valve 21 connected to the vacuum suction means (not shown) is opened. The force spreads from the inlet / outlet port 3b to the hollow portion 3c to suck the master disk 2 from the center hole 1a of the slave disk 1, so that the master disk 2 comes into close contact with the slave disk 1. Since the vacuum suction is maintained for a predetermined time required for magnetic transfer, the transfer information recorded on the master disk 2 is applied to the slave disk 1 by applying an external magnetic field while the slave disk 1 and the master disk 2 are in close contact with each other. Transcribed.

After the elapse of a predetermined time, the suction electromagnetic valve 21 is closed to stop the vacuum suction, and at the same time, when the opening electromagnetic valve 22 connected to the unillustrated compressed air supply means is opened, the compressed air is discharged from the suction and exhaust port 3b. The compressed air is supplied to the hollow portion 3c, enters the space between the slave disk 1 and the master disk 2 through the center hole 1a of the slave disk 1, and
And the master disk 2 are separated from the close contact state. As shown in FIG. 2, the compressed air supply pressure requires a certain time from the start of the supply to a stable state, and the compressed air supply pressure is sufficient to sufficiently separate the slave disk 1 and the master disk 2 as in the prior art. If the supply time is increased, the compressed air pressure increases during that time, the flow rate between the slave disk 1 and the master disk 2 increases, and the disk vibrates due to the venturi effect as described above (see FIG. 5). ).

In this embodiment, as shown in FIG. 2, the supply of compressed air is stopped in a short time, and when the close contact between the slave disk 1 and the master disk 2 is released by the supply of compressed air, the master disk is driven by driving the linear slider 6. 2
From the slave disk 1. The driving timing of the linear slider 6 is controlled by a pressure switch 23 provided in the compressed air supply path as shown in FIG. 1 to a predetermined compressed air pressure lower than the compressed air pressure which is a flow rate at which the disk vibrates as shown in FIG. When the pressure is detected and a predetermined air pressure is detected by the pressure switch 23, the rectilinear slider 6 is moved backward by the control of the control unit 25. Further, when a predetermined compressed air pressure is detected by the pressure switch 23,
The control unit 25 may control the opening electromagnetic valve 22 to be closed. Since the supply of compressed air is stopped before the flow rate at which vibration occurs, the holder 4 is moved backward by the linear slider 6. The configuration may be such that the slave disk 1 and the master disk 2 are separated.

The holder 4 in the magnetic transfer apparatus described above can be constructed by providing a buffer mechanism as shown in FIG. In the holder 24 shown in FIG. 3, a cylindrical portion 31 extending from a suction portion 30 for sucking the master disk 2 toward a suction port 24a is slidably supported by a fixed portion 32, and the suction portion 30 and the fixed portion A spring 33 (buffer means) is provided between the spring 33 and the spring 32. Due to the structure of the holder 24, a damper effect acts on the master disk 2 and vibration is less likely to occur. By applying the holder 24 to the magnetic transfer device shown in FIG. 1, a vibration of the disk can be more effectively prevented by adding a damper effect.

The same effect can be obtained even if the spring 33 is made of an air damper, an elastic material or the like.
In addition, the shock-absorbing action of the holder 24 reduces the shock when the master disk 2 is brought into contact with the slave disk 1 and can prevent the master disk 2 from being damaged by the shock.

[0019]

As described above, according to the present invention, the master disk and the slave disk can be brought into close contact with each other by vacuum suction to perform high-quality magnetic transfer, and can be released from the close contact state by supply of compressed air. Without damaging the disk, the vibration of the disk caused by the supply of compressed air can be prevented by a simple configuration.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a main configuration of a magnetic transfer apparatus according to an embodiment.

FIG. 2 is a timing chart showing the operation timing of each component.

FIG. 3 is a configuration diagram showing an embodiment of a holder.

FIG. 4 is a configuration diagram illustrating a main configuration of a magnetic transfer apparatus according to a conventional technique.

FIG. 5 is a timing chart showing the operation timing of each unit in the conventional configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slave disk 1a Center hole 2 Master disk 3 Suction head (slave disk holding means) 4, 24 Holder (master disk holding means) 6 Linear slider (advance / retreat driving means) 21 Suction electromagnetic valve 22 Opening electromagnetic valve 23 Pressure switch (Pressure detecting means) 25 Control unit (Control means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Taizo Hamada 1006 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazuo Nimura 1-1-1, Tanabe Shinda, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric (72) Inventor Akira Saito 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd.

Claims (5)

[Claims] 1. A magnetic transfer method for magnetically transferring transfer information recorded on a master disk to a slave disk by closely contacting a master disk having no hole at the center and a slave disk having a center hole at the center. The slave disk is held by the slave disk holding means having a suction / exhaust port opened in the center hole while holding the slave disk, and the master disk is brought into contact with the slave disk. After performing magnetic transfer while the master disk is in close contact with the master disk, the vacuum suction from the suction and exhaust ports is switched to the pneumatic supply to release the close contact between the slave disk and the master disk, and the pressure of the pneumatic supply exceeds a predetermined value. The master disk and the slave disk Magnetic transfer method. 2. The magnetic transfer method according to claim 1, wherein the supply of the compressed air is stopped when the supply pressure of the compressed air exceeds a predetermined value. 3. A magnetic transfer apparatus for magnetically transferring transfer information recorded on a master disk to a slave disk by closely contacting a master disk having no hole at the center and a slave disk having a center hole at the center. Slave disk holding means for holding a slave disk and having an intake / exhaust port opened in the center hole,
Master disk holding means for holding the master disk, advance and retreat driving means for moving the master disk holding means or the slave disk holding means in a direction in which the master disk and the slave disk come into contact with each other,
Magnetic transfer means for magnetically transferring the transfer information recorded on the master disk to the slave disk, vacuum suction means for vacuum suction from the suction and exhaust ports, compressed air supply means for discharging compressed air from the suction and exhaust ports, and the compressed air supply Pressure detecting means for detecting the pressure of the compressed air supply by means, and control means for operating the advance / retreat driving means in a direction in which a master disk and a slave disk are separated based on pressure information from the pressure detecting means. A magnetic transfer device characterized by the above-mentioned. 4. The magnetic transfer apparatus according to claim 3, wherein the control means stops the supply of compressed air from the compressed air supply means based on the pressure information from the pressure detection means. 5. The magnetic transfer apparatus according to claim 3, wherein the master disk holding means is provided with a buffering means having a buffering effect in a direction facing the slave disk.