JPS61123076A - Method and device for removing dust from laminated magnetic disc - Google Patents

Abstract

PURPOSE:To remove dust effectively in a short time from a laminated magnetic disc by deforming and contacting a pad whose outer diameter is larger than intervals of a magnetic disc and by varnishing instantaneously both sides of the disc. CONSTITUTION:A hollow cylinder shaped rubber pad 2 has larger outer diameter than laminated intervals of magnetic disc 1 and wrapping tape 3 having abrasive grain on its surface is stuck on the surface of pad 2, and the pad 2 is easily attachable/dettachable on an arm 4. Rotating the magnetic disc 1 with the prescribed number of rotation and inserting the pad 2 between a space of disc 1, the pad 2 is deformed and contacted perfectly both sides of disc. The pad 2 is passed through the disc from peripheral side to inner circumference of the magnetic disc 1 so as to remove dust attached the magnetic disc 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to removing dust from the surface of the magnetic disks of a magnetic disk device in which a plurality of magnetic disks are stacked concentrically. The present invention relates to a method and device for removing dust that can be removed at any time.

As is well known, a magnetic disk device is called a magnetic disk. For recording media in which a magnetic film is formed on a disk-shaped substrate,
A floating magnetic head is arranged to record/reproduce information.

In addition, in order to increase the capacity of such magnetic disk drives, multiple magnetic disks are mounted on the same spindle at predetermined intervals, and a magnetic head is placed on each magnetic disk surface. Information is recorded/reproduced on and from a plurality of magnetic disks using this device.

In such magnetic disk devices, various measures have been taken to further increase the capacity.

One method is to reduce the spacing loss between the magnetic disk and the magnetic head.

Conventionally, the gap between the magnetic disk and the magnetic head was about 1 pm, but in order to further improve the recording density, devices with a gap of about 0.5 μm or less are now being commercialized.

In this direction of lowering the flying height, the presence of protrusions such as dust adhering to the surface of the magnetic disk has become a major problem.

This is because if the deposits on the magnetic disk are in the form of protrusions, the magnetic head will collide with the protrusions, causing the magnetic head to lose flying stability and come into contact with the magnetic disk, causing a head crash. There was a fear that it would happen.

Therefore, it is desired to effectively remove the protrusions made of dust from the surface of the magnetic disk.

[Prior art and problems to be solved by the invention] Conventionally, the method disclosed in Japanese Patent Publication No. 5B-3293 has been used to remove protrusions caused by adhesion of dust on the surface of such a magnetic disk. was widely used.

That is, a verniille process is provided as the last process in the manufacturing method of a magnetic disk, and a method has been proposed in which protrusions such as dust that have adhered to the previous process are removed in this process.

To explain this method simply, a magnetic disk is rotated at a predetermined number of revolutions, and a floating simulated head is placed on top of the magnetic disk.
The magnetic disk is levitated and scanned with a flying height of about 100%.

Also, at this time, by installing an AE (auto emission solution) element on this simulated head and detecting the position where the protrusion exists during scanning, the C3S is activated at the position of the protrusion.
This method attempts to remove the protrusion by repeating (contact, start, stop).
□ By doing this, it becomes possible to remove protrusions caused by dust attached to the surface of the magnetic disk.

A method of removing dust on the surface of a magnetic disk using tape burnishing has also been proposed.This method uses polish tape, which has abrasive grains attached to the surface, and slides it over the surface of the magnetic disk. It is to be removed.

This method makes it possible to remove dust attached to the surface of the magnetic disk.

However, all of these methods are performed in the manufacturing process of magnetic disks.

However, such dust may also adhere during the process of completing the manufacturing of the magnetic disk and assembling it into a magnetic disk device, so it is desirable to be able to remove the above-mentioned dust even after the magnetic disk is assembled. It is rare.

A magnetic disk device generally has a plurality of magnetic disks mounted on the same device, and after assembly, a plurality of magnetic disks are concentrically stacked at predetermined intervals. The above-mentioned method has the disadvantage that when removing dust from the magnetic disk after assembly, it must be removed from each side of each magnetic disk, resulting in poor workability.

Therefore, it is an object of the present invention to provide a dust removal method and a dust removal apparatus that are effective in removing dust from stacked magnetic disks after assembly.

[Means for solving problems]

In order to remove dust attached to the surface of a magnetic disk in a state where a plurality of magnetic disks are concentrically stacked at a predetermined interval, the present invention has an outer diameter larger than the interval between the stacked magnetic disks. , a dust removing means deformed by an external force is used to remove dust attached to the magnetic disk by passing the dust removing means between the magnetic disks while rotating the magnetic disk, Furthermore, in order to realize this method, a means for rotating the stacked magnetic disks, the dust removing means, and a driving means for mounting the dust removing means and inserting and passing the means between the magnetic disks are provided. .

[Effect]

By configuring as described above, in the present invention, it is possible to simultaneously remove dust between magnetic disks from both opposing surfaces.

That is, the dust removal means according to the present invention is constructed by, for example, a hollow cylindrical rubber pad having an outer diameter larger than the spacing between the magnetic disks, and a wrapping tape pasted on the surface of the pad that contacts the magnetic disks. By inserting this pad between the magnetic disks, the pad deforms to follow the gap between the magnetic disks, but the force of the pad to restore it makes it contact evenly with both opposing surfaces of the magnetic disk. By rotating the pad and moving the pad in the radial direction, dust can be removed by harnessing the front surface of both surfaces facing the magnetic disk.

In this way, according to the present invention, dust can be removed from both opposing surfaces of the magnetic disk at the same time.

〔Example〕

FIG. 1 is a diagram for explaining one embodiment of the present invention.

In the figure, 1 is a magnetic disk, 2 is a hollow cylindrical rubber pad, 3 is a wrapping tape, and 4 is a pad holding arm.

The assembled magnetic disks 1 are stacked concentrically at predetermined intervals as shown in the figure.

On the other hand, in order to remove dust from the magnetic disk, a dust removal mechanism consisting of a hollow cylindrical rubber band 2 and a wrapping tape 3 on its surface is mounted on the arm 4.

The hollow cylindrical pad 2 is made of an elastic body made of rubber, and has an outer diameter that is at least larger than the stacking interval of the magnetic disks.

As is well known, the lapping tape 3 is a tape-like material having abrasive grains provided on its surface, and is pasted on the surface of the pad 2.

This pad 2 is detachably attached to the arm 4, and its size or material can be changed depending on the stacking interval of the magnetic disks 1 to remove dust and the characteristics of the magnetic disks 1.
Furthermore, it is also possible to simply replace the pad 2. The wrapping tape 3 is configured to be replaceable and is attached to the pad 2 using, for example, double-sided tape.

The arm 4 drives the magnetic disk l by a drive mechanism (not shown).
The structure is such that the pad can be driven to move and pass between the two.

The distance between the outer diameter of the pad 2 and the magnetic disk is preferably set within about 10%, although the outer diameter of the pad 2 is set larger as described above.

Dust is removed by the following method using the dust removing means configured as described above. First, the magnetic disk 1 is rotated at a predetermined number of rotations in the direction of the arrow.

Next, in this state, the pad 2 with the wrapping tape 3 attached to its surface is inserted between the magnetic disks 1. At this time, the pad 2 deforms to follow the spacing between the magnetic disks, and comes into complete surface contact between both magnetic disks.

In this state, as shown in FIG. 2, the pad '2 is applied between the magnetic disks from the outer circumference to the inner circumference of the magnetic disk 2, so that the wrapping tape 3 provided on the surface of the pad 2 wraps the surface of the magnetic disk. Dust attached to the magnetic disk 1 can be removed by a method similar to the tape burnishing process performed in the magnetic disk manufacturing process.

With this configuration, it is possible to simultaneously remove dust from both sides of the opposing surface on which the magnetic disk 1 is mounted.

Next, a detailed embodiment of the dust removal apparatus for stacked magnetic disks according to the present invention will be described with reference to FIG.

In the figures, the same symbols as in Figure 1 indicate the same things,
Furthermore, in the figure, 5 is a fixed base, 6 is a drive motor (-gear (pinion), 7 is a gear (rank), 8 is a rimiso 1 switch, 9 is a guide roller, 10 is a guide rail, 11 is a base, 12 is a motor, Reference numeral 13 indicates a spindle, 14 a fixing screw, and 15 a pa/nod insertion guide.

In FIG. 4, a bar 2, which serves as a dust removal means and has a wrapping tape attached to its surface, is mounted on an arm 4. The number of pads 2 varies depending on the number of stacked magnetic disks 1, but the pads 2 are provided according to the number of spaces between the magnetic disks, and in this embodiment, five pads 2 are provided exactly between the magnetic disks 1. The arms 4 are fixed to a fixed base 5 so as to be positioned correspondingly.

The fixed base 5 has a cart configuration that allows the pad 2 to be moved at the same time.

That is, with respect to a plate-shaped guide rail 10 extending in the radial direction with respect to the magnetic disk 1, the fixed base 5 is configured to be movable on the guide rail 10 by the guide rollers 9.

There are 6 guide rollers in total, 1 guide roller 1 rule
0 on each of the four corners of the fixed base 9, guide rail 1
0, two (2) are provided on both sides of the center of the fixed base 9. The fixed base 5 is driven by a drive motor mounted on the fixed base and a gear (pinion) 6 directly connected to the drive motor.
and a gear (
By driving the drive motor 6 according to the rank), it is possible to reciprocate along the guide rail 10.

In addition, the movement of this fixed base is necessary to detect the range.
Microswitches 8 are provided at both ends of the movement range.

On the other hand, the magnetic disk 1 is assembled so as to be mounted on an actual magnetic disk device as shown in the figure, and in this embodiment, six discs are stacked at predetermined intervals and assembled.

In this state, the mounting is fixed to the spindle 13 with screws 14.

The spindle 13 is rotatably supported by upper and lower bearings with respect to the base, and is connected to a motor 12 that rotates the magnetic disk 1 at -i.

Reference numeral 15 denotes a pad insertion guide 1-, which guides and positions the pad 2 to insert it between the magnetic disks. This guide 15 is provided with a hole corresponding to each pad 2, and the pad 2 is guided and inserted between the magnetic disks 1 by passing through this hole.

As detailed in FIG. 1, the pad 2 itself has an outer diameter larger than the gap between the magnetic disks, and if it is not inserted between the magnetic disks in a deformed state, it will collide with the outer peripheral side of the magnetic disk 1. This insertion guide 15
The pad 2 is provided to be inserted between the magnetic disks 1 in a state in which the pad 2 is deformed to a state that is equal to or smaller than the spacing between the magnetic disks 1.

In addition, the magnetic disk 1, spindle 13, and motor 12
An actual magnetic disk device may be used for the base and the like indicated by diagonal lines.

In this case, the magnetic disk device may be placed on the base 11 with its cover removed.

The pad insertion guide 15 in this case must be designed so as not to hinder the mounting of the magnetic disc device.

The dust removal device for magnetic disks configured as described below removes dust from a magnetic disk 1 as explained in FIGS. 1 and 2.
While being rotated by the motor 12, the drive motor 6 is driven to insert the pad 2 between the magnetic disks 1 via the pad insertion guide 5, and insert the pad 2 in the order of outside - inside - outside of the magnetic disk 1. It moves sequentially with , and finally stops in the initial state shown in the figure. This control ability controls drive reversal and stop by detection of each limit switch 8.

This makes it possible to remove dust from the magnetic disk.

(Effects of the Invention) As described in ``2'' below, in the present invention, a pad having an outer diameter larger than the gap between the magnetic disks is used, and this band is deformed between the magnetic disks so that they come into contact with each other. Since both sides can be burnished at the same time, dust can be effectively removed from stacked magnetic disks in a short time.

[Brief explanation of the drawing]

FIG. 1 shows a perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of essential parts of an embodiment of the invention, and FIG. 3 shows a detailed view of the dust removal device of the invention. Furthermore, in the figure, 1 is a magnetic disk, 2 is a pad, and 3 is a magnetic disk.
is Lasopinda tape, 4 is arm, 5 is fixed base, 6 is drive motor + gear (pinion), 7 is gear (rank), 8
1 is a limit switch, 9 is a guide roller, 10 is a guide rail, 11 is a base, 12 is a motor, 13 is a spindle, 14 is a fixing screw, and 15 is a pad/7 pad insertion guide.

Claims (1)

[Scope of Claims] 1) A method for removing dust attached to the surface of a magnetic disk in a state where a plurality of magnetic disks are concentrically stacked at a predetermined interval, the method comprising: From a stacked magnetic disk, which has a large outer diameter and removes dust by passing a dust removal means that is deformed by an external force between the magnetic disks while rotating the stacked magnetic disks. How to remove dust. 2) A method for removing dust from stacked magnetic disks according to claim 1, wherein the dust removing means has a wrapping tape provided on a surface that contacts the magnetic disks. 3) The method for removing dust from a stacked magnetic disk according to claim 1, wherein the dust removing means is constructed by pasting a wrapping tape on the surface of a cylindrical rubber pad. . 4) A device for removing dust attached to the surface of a plurality of magnetic disks concentrically stacked at predetermined intervals, the device comprising a rotating means for rotating the plurality of magnetic disks in a stacked state; , a dust removing means having an outer diameter larger than the interval between the stacked magnetic disks and deformed by an external force, and a driving means for inserting and passing the dust removing means between the stacked magnetic disks, A dust removal device for stacked magnetic disks, characterized in that it removes dust. 5) The dust removing device for stacked magnetic disks according to claim 4, wherein the dust removing means is provided with a wrapping tape on a surface that contacts the magnetic disks. 6) The dust means is composed of a hollow cylindrical rubber pad, and a wrapping tape is attached to the surface of the rubber pad. Dust removal device for magnetic disks. 7) Guide means for guiding the insertion of the dust removal means between the magnetic disks is provided near the outer periphery of the stacked magnetic disks, and the guide means has a spacing equal to or similar to the spacing between the stacked magnetic disks. Holes with the following spacing are provided to face each other between the magnetic disks, and when the dust removal means passes through the guide, the holes are deformed to a value equal to or less than the spacing between the stacked magnetic disks. 5. The stacked magnetic disk dust removing device according to claim 4, wherein the dust removing device is inserted into the stacked magnetic disk.