JP2006015189A - Disc-cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disc-cleaning apparatus capable of improving the efficiency of the disc-cleaning apparatus based on shower cleaning by the use of rotary brushes. <P>SOLUTION: This apparatus has a pair of first rotary brushes pinching discs to be cleaned from the front and back sides to hold and rotating the discs, a driving mechanism driving the rotation of the first rotary brushes, a chucking mechanism chucking the discs in a rotatable way and a pair of second rotary brushes pinching the discs from the front and back sides to hold and applying a load to the rotation of the discs by the first brushes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disc cleaning device, and more specifically, in a disc cleaning device that performs shower cleaning using a rotating brush, the generation of abrasion powder by a disc chuck roller or the like can be suppressed, and the cleaning efficiency can be improved. The present invention relates to a disk cleaning device.

In the manufacturing process of the magnetic disk, the disk is cleaned after the polishing process or the like. There are two types of cleaning of disks (including magnetic disks and magnetic disk substrates, the same applies below): ultrasonic cleaning and brush cleaning. Of these, brush cleaning is performed with a roller brush or the like while spraying water or a shower of cleaning liquid. Rub and clean the front and back of the disc with a rotating brush. At this time, cleaning is usually performed while rotating the disk, and dirt such as oil film, polishing powder, and foreign matter adhering to the disk is removed (Patent Documents 1 and 2).
In this case, the disk is driven to rotate by following the rotation of the rotating brush and rotating the disk, and the disk is driven to rotate and follow the rotation to rotate the rotating brush.
JP-A-9-103748 JP 2002-66466 A

In a disk cleaning apparatus that uses a rotating brush as shown in Patent Documents 1 and 2, particularly in an apparatus that rotates a disk following the rotation of the rotating brush, the disk to be cleaned is usually a peripheral chuck. A configuration is adopted in which the roller is supported by rollers so as to be rotatable at three points, and is rotated and driven by rotation of a rotating brush in contact with the front and back of the disk.
On the other hand, when the disk is incorporated as a magnetic disk device, it is driven at a high speed, for example, at a rotational speed of 5400 rpm to 10000 rpm or more, for high density recording and improved access speed. At present, those with a size of 3.5 inches or less have become mainstream, and the disks have been made thinner and smaller, and their mass has become smaller. Therefore, for example, when the rotating brush rotates at a high speed of about 500 rpm, the cleaning disk may rotate substantially in synchronization with the rotating brush. As a result, there is a problem that the frictional force of the roll brush against the surface of the cleaning disk is reduced. In response to this, the chuck roller in contact with the outer periphery of the disk can be rotated at a high speed.

When the cleaning disk rotates in this manner, two problems occur. First, when the cleaning disk rotates synchronously, the surface of the disk is not sufficiently cleaned even if time is taken due to a decrease in frictional force between the rotating brush and the surface of the cleaning disk.
Secondly, a roller for chucking the cleaning disk on its outer periphery is driven to rotate at the outer periphery of the disk and rotates at a very high speed, so that the roller is worn, and the wear powder contaminates the cleaning disk.
SUMMARY OF THE INVENTION An object of the present invention is to solve such problems of the prior art, and to provide a disc cleaning device that can improve the cleaning efficiency of a disc cleaning device that performs shower cleaning using a rotating brush. There is.
Another object of the present invention is to provide a disk cleaning apparatus capable of suppressing the generation of wear powder by a disk chuck roller or the like of a disk cleaning apparatus that performs shower cleaning using a rotating brush.

In order to achieve such an object, the disc cleaning device of the present invention is characterized in that in the disc cleaning device that performs shower cleaning using a rotating brush,
A pair of first rotating brushes for rotating the disk to be cleaned from both front and back surfaces, a drive mechanism for rotating the first rotating brush, a chuck mechanism for chucking the disk rotatably, and a disk A pair of second rotating brushes are provided that sandwich the front and back surfaces and apply a load to the rotation of the disk by the first rotating brush.

Thus, in the present invention, since the second rotating brush, for example, the second roll brush applies a load to the rotation of the disk by the first rotating brush, for example, the first roll brush, at the time of cleaning, The disk does not rotate in synchronism with the rotation of the first roll brush, and a reduction in the frictional force of the roll brush against the surface of the cleaning disk is prevented. In addition, since the cleaning is performed while the predetermined frictional force is maintained by the four roll brushes, the cleaning can be surely performed and the cleaning efficiency is improved.
Further, when the chuck mechanism is configured to chuck the outer periphery of the disk with a roller, the roller does not rotate at a high speed in accordance with the rotation of the disk, so that generation of wear particles on the roller is suppressed and the disk is less likely to be contaminated. .
As a result, it is possible to suppress the generation of abrasion powder by the disc chuck roller or the like in the disc cleaning apparatus that performs shower cleaning using a rotating brush, and it is possible to improve the cleaning efficiency.

  FIG. 1 is an explanatory view of a disk cleaning apparatus according to an embodiment to which the present invention is applied, FIG. 2 is a schematic view of the cleaning portion, FIG. 3 is an explanatory view of a roll brush drive mechanism, and FIG. Cross-sectional explanatory drawing of the relationship between a brush and a bearing unit, and FIG. 5 are the rotation transmission mechanisms of a roll brush.

In FIG. 1, reference numeral 10 denotes a disk cleaning device, and reference numeral 1 denotes a disk to be cleaned brought into the cleaning chamber 11. 2a and 2b are cleaning brush units, 3 is a disk loading / unloading mechanism, 4a and 4b are three-point supported disks comprising chuck rollers 41, 42 and 43 provided in the disk loading / unloading mechanism 3. Chuck mechanism, 5a and 5b are roll brush rotation drive mechanisms, 6a and 6b are shower nozzles, 7 is a roll brush interval setting mechanism (see FIG. 3), and 8 is a wall surface base plate provided in the cleaning chamber 11. (See FIG. 3).
Furthermore, in FIG. 3, 12 is a drive control part, 13 is a control apparatus.
As shown in FIGS. 1 and 3, the disk chuck mechanisms 4a and 4b are composed of chuck rollers 41, 42, and 43, a chuck arm 44, and a chuck driving mechanism 45, respectively. The chuck rollers 41, 42, and 43 are chuck driving mechanisms. The chuck drive mechanisms 45 that are rotatably attached to the 45 and have the chuck rollers 41, 42, and 43 are provided above and below the rotating disk 31, respectively. The chuck driving mechanisms 45 of the disk chuck mechanisms 4a and 4b are fixed to the rotating disk 31 of the disk loading / unloading mechanism 3 in the vertical direction.

As shown in FIGS. 1 and 2, the respective chuck rollers 41, 42 and 43 of the disk chuck mechanisms 4 a and 4 b chuck the outer periphery of the disk 1 at three points. The chuck roller 41 is positioned at the apex of the isosceles triangle, and the chuck rollers 42 and 43 are positioned at the corners of the base and are arranged to face each other. The chuck roller 41 is fixed to the tip of the chuck arm 44 and is rotated by the chuck drive mechanism 45 to the position indicated by the dotted line to receive the disk 1 and chuck the disk at the solid line position, or conversely the chucked disk 1. Cancel at the dotted line position.
The disk chuck mechanism 4b (the chuck rollers 41, 42, 43) located on the upper side of the rotating disk 31 is located at the position where the disk 1 is loaded or unloaded, and is located on the lower side. The chuck rollers 41, 42, 43) are set at positions for cleaning the disk 1.
As shown in FIG. 3, the disk loading / unloading mechanism 3 includes a rotating disk 31 and a motor 32 that rotationally drives the rotating disk 31, and the motor 32 is fixed to the wall surface base plate 8. Then, when the motor 32 rotates the rotary disc 31 halfway, the positions of the disk chuck mechanism 4a and the disk chuck mechanism 4b are switched.

As shown in FIG. 2, the cleaning brush units 2a and 2b are roll brushes each composed of a pair of rollers, and these are arranged on the left and right in the cleaning chamber 11 as shown in FIGS. Yes. The cleaning brush unit 2a is composed of a pair of hollow cylindrical porous rollers 21 and 22 (hereinafter referred to as rollers 21 and 22) provided to face the front and back of the disk 1, and the cleaning brush unit 2a is the same. Porous rollers 23 and 24 (hereinafter referred to as rollers 23 and 24).
These rollers 21 to 24 are respectively mounted on the rotation shafts of the roll brush rotation drive mechanisms 5a and 5b via hollow portions.
Here, the rollers 21 and 22 are cleaning rollers and are rollers that apply a load to the rotation of the disk 1 by the rollers 23 and 24.
As shown in FIG. 4, the rollers 21 to 24 are a pair of hollow cylindrical sponge roll brushes, for example, made of polyvinyl formal resin. The tensile strength is about 300 kPa to 400 kPa, the porosity is 80 or more, and the pore diameter is about 100 μm to 2000 μm. The outer diameter of the cylinder is selected from the range of about 25 mm to 100 mm, and the inner diameter forming the hollow portion is selected from the range of about 12 mm to 60 mm. Its length is about 250 mm to 500 mm.

The rollers 21 and 22 are rotated at a rotational speed smaller than the rotational speeds of the rollers 23 and 24 and contact the front and back of the disk 1. For this purpose, the rollers 23 and 24 become loads on the rotation of the disk 1 by the rollers 23 and 24. For example, if the rotation speed of the rollers 23 and 24 is 500 rpm in order to rotate the disk 1 counterclockwise, the rotation speed of the rollers 21 and 22 is 250 rpm that is half of the rotation speed. Since these rollers are located on the left and right with respect to the center of the disk 1, the rotation directions are opposite to each other.
Since the rotation speeds of the rollers 21 and 22 are smaller than the rotation speeds of the rollers 23 and 24, the rotation of the disk 1 by the rollers 23 and 24 in the counterclockwise direction is braked by the rollers 21 and 22, and the rotation of the disk 1 The number falls from 500 rpm to about 300 rpm to 450 rpm.
Thus, the rollers 21 and 22 and the rollers 23 and 24 are brought into contact with the front and back surfaces of the disk 1 by generating frictional force.
As a result, the oil film, polishing powder, foreign matter and the like attached to the disk 1 are removed by the four rollers in the shower cleaning state. At this time, the disk 1 does not increase to the rotation speed of the rollers 23 and 24, the rotation of the chuck rollers 41, 42, and 43 is suppressed, and the dust is generated due to the wear of the chuck rollers 41, 42, and 43 generated by the high-speed rotation. Is suppressed.

Since the roll brush rotation drive mechanisms 5a and 5b shown in FIG. 1 have the same structure, the roll brush rotation drive mechanism will be described below with reference to FIGS. A detailed description of 5b is omitted.
The roll brush rotation drive mechanism 5a has brush holders 51 (see FIGS. 1 and 4) and 52 (see FIG. 3) on which rollers 21 and 22 are mounted and rotatably supported. As shown in FIGS. 2 and 3, the brush holders 51 and 52 include rotating shafts 51a and 52a and bearing units 51b and 52b (see FIGS. 3 and 4) for supporting the rotating shafts 51a and 52a. Further, the rotation shafts 51a and 52a of the brush holder are composed of transmission shaft tubes 55 and 56 (see FIG. 3) that transmit the rotation by a shaft inserted into the tube and rotate the shafts.
In correspondence with the brush holders 51 and 52, the roll brush rotation drive mechanism 5b has brush holders 53 and 54 (see FIG. 1). The rotating shafts are 53a and 54a (see FIG. 2), the bearing units are 53b and 54b (see FIG. 4), and the transmission shaft tubes are 57 and 58 (see FIG. 1).
Incidentally, in FIG. 3, the disk cleaning device 10 is seen from the lower side in order to explain the relationship between the rollers 21 and 22, the rotating shafts 51 a and 52 a, and the transmission shaft tubes 55 and 56. Therefore, the height relationship between the transmission shaft tube 55 and the transmission shaft tube 56 in FIG. 1 is reversed. Further, although the manner of coupling between the transmission shaft tubes 55 and 56 and the bearing units 51b and 52b is omitted in FIG. 1, the shaft axis of the transmission shaft tube 55 is from the outside as shown in FIG. It wraps around and is coupled to the rotating shaft 51a. On the other hand, the shaft axis of the transmission shaft tube 56 is configured to be coupled to the rotary shaft 52a on the inner side.

As shown in FIG. 3, the transmission shaft pipes 55 and 56 vertically pass through the wall surface base plate 8 through corresponding bearings 55 a and 56 a, and are slidably supported by the wall base plate 8. Is driven forward and backward.
Further, like the transmission shaft pipes 55 and 56, the transmission shaft pipes 57 and 58 also vertically pass through the wall surface base plate 8, are slidably supported by the wall base plate 8, and are driven forward and backward by the roll brush interval setting mechanism 7.
These transmission shaft pipes 55 to 58 are respectively equipped with driven gears 55b to 58b (see FIG. 5) of shaft ends penetrating the inside. These driven gears 55b to 58b have the same number of teeth. The driven gear 55b and the driven gear 56b mesh with each other, and the driven gear 57b and the driven gear 58b mesh with each other.
When the drive gear 59 is engaged with the driven gear 55b, the driven gears 55b and 56b are driven, and when the drive gear 60 is engaged with the driven gear 57b, the driven gears 57b and 58b are driven.

The drive gear 59 has fewer teeth than the drive gear 60, and driven pulleys 61 and 62 (see FIG. 3) are fixed to the drive gear 59, respectively. On the other hand, a driven pulley 63 is fixed to the drive gear 60.
The driven pulleys 61 and 62 are pulleys having a larger diameter than the driven pulley 63. These driven pulleys 61 to 63 are driven via a belt 66 by a driving pulley 65 coupled to one motor 64.
As a result, the transmission shaft pipes 55 and 56 are reduced to substantially half the rotational speed of the transmission shaft pipes 57 and 58. As a result, as described above, the rollers 21 and 22 are 250 rpm, and the rollers 23 and 24 are 500 rpm.
In addition, since the rollers 21 and 22 and the rollers 23 and 24 are rotationally driven by one motor 64, the rotation is synchronized even if the rotational speed is different, so that the four rollers are brought into contact with each other. However, cleaning marks or the like hardly occur on the front and back surfaces of the disk 1.

The roll brush interval setting mechanism 7 shown in FIG. 3 is a mechanism that sets the interval between the rollers 21 to 24. This comprises an advance / retreat drive mechanism 71 and a seesaw lever 72. The advancing / retracting drive mechanism 71 is an advancing / retracting drive mechanism such as a stepping motor. A rod 71a is coupled to one end of the seesaw lever 72, and the seesaw lever 72 is moved backward to move the transmission shaft tubes 55 and 56 in a predetermined direction opposite to each other. It is a roller contact mechanism that moves by a distance to contact or separate the pair of rollers 21 and 22. Note that the belt 66 is switched from the driven pulley 61 to the driven pulley 62 when the roller 21 or 22 is in contact with the roller, or when the roller 21 or 22 is in contact with the surface of the disc 1. .
The transmission shaft tubes 57 and 58 are not shown in the figure, but are the same, and by moving in the opposite directions, the pair of rollers 23 and 24 are brought into contact with the rollers 21 and 22 at the same time, Or leave them apart.

7a and 7b (not shown) are shower nozzles attached to the bearing units 51b and 52b, respectively, and are provided corresponding to the rollers 21 and 22, respectively. These shower nozzles 7a and 7b are driven when the roll brush interval setting mechanism 7 is driven and the rollers 21 and 22 are in contact with each other as indicated by dotted lines in a state where the disk 1 is not loaded at the cleaning position of the disk cleaning device 10. In addition, the cleaning liquid is sprayed and supplied to the rollers 21 and 22 from the back surface. Although not shown, there are similar shower nozzles for the rollers 23 and 24. Of course, the shower nozzles 7a and 7b are also used during disk cleaning. Furthermore, it goes without saying that the shower nozzles 6a and 6b may also be used for cleaning the roll brush.
At this time, since the outer diameters of the rollers 21 and 22 and the rollers 23 and 24 are about 25 mm to 100 mm, the rollers 21 and 22 bend to each other more greatly than the state in contact with the surface of the disk 1 in the roller cleaning state. For example, the outer diameter is recessed by about 3 mm to 5 mm and is brought into contact with each other. In this state, the rollers 21 and 22 and the rollers 23 and 24 are idled and rotated, and the cleaning liquid is supplied to the rollers 21 and 22 and the rollers 23 and 24 for cleaning.

The advance / retreat drive mechanism 71 is drive-controlled by the drive control unit 12, and the control is performed by the control device 13. As shown in FIG. 3, the control device 13 has an MPU 13a, a memory 13b, and the like, and a disk cleaning processing program (PRG) 131, a roll brush cleaning processing program (PRG) 132, and the like are built in the memory. ing.
The MPU 13 a executes the disc cleaning processing program 131 to control the roll brush interval setting mechanism 7. At this time, the advancing / retracting drive mechanism 71 drives the seesaw lever 72 to move the transmission shaft pipes 55, 57 and the transmission shaft pipes 56, 58 forward and backward in the opposite directions, thereby moving the rollers 21, 22 and the rollers 23, 24 to the disc 1 At the same time, the cleaning liquid is sprayed from the shower nozzles 6a and 6b and the shower nozzles 7a and 7b to the rollers 21 and 22 and the rollers 23 and 24, and these are supplied for a predetermined time. Then, the disk 1 is cleaned by rotating.
Further, when the cleaning disk 1 is not loaded, the MPU 13a executes the roll brush cleaning processing program 132 as necessary to control the advance / retreat driving mechanism 71, and the rollers 21, 22 and the rollers 23, 24 are mutually connected. Abut. At this time, the rollers 21 and 22 and the rollers 23 and 24 are in contact with each other until the outer diameter of about 3 mm to 5 mm is crushed. The cleaning liquid is supplied as a shower from the shower nozzles 7a and 7b, etc., and is idled for a predetermined time, and the rollers 21 and 22 and the rollers 23 and 24 are rotated and cleaned.

  As described above, the difference in the rotational speed between the rollers 21 and 22 and the rollers 23 and 24 in the embodiment is an example, and the rollers 21 and 22 are rotationally driven by the rollers 23 and 24 with respect to the disk. As long as it is a load for rotating the disk. Therefore, the rollers 21 and 22 may rotate freely without being driven or driven at a lower rotational speed than the rollers 23 and 24.

FIG. 1 is an explanatory diagram of a disk cleaning apparatus according to an embodiment to which the present invention is applied. FIG. 2 is a schematic view of the cleaning portion. FIG. 3 is an explanatory diagram of a roll brush rotation drive mechanism. FIG. 4 is a cross-sectional explanatory view of the relationship between the roll brush and the bearing unit. FIG. 5 shows a rotation transmission mechanism of the roll brush.

Explanation of symbols

1 ... disk, 2a, 2b ... cleaning brush unit,
3 ... Disk loading / unloading mechanism,
4a, 4b ... disc chuck mechanism,
41, 42, 43 ... chuck rollers,
5a, 5b ... Roll brush rotation drive mechanism,
6a-6b ... shower nozzle,
7 ... Roll brush interval setting mechanism,
8 ... Wall base plate, 10 ... Disc cleaning device,
DESCRIPTION OF SYMBOLS 11 ... Cleaning room, 12 ... Drive control part, 13 ... Control apparatus,
21-24 ... Roller,
51, 52, 53, 54 ... brush holder,
51a, 52a, 53a, 54a ... rotating shaft,
51b, 52b, 53b, 54b ... bearing unit,
55, 56, 57, 58 ... transmission shaft tube.

Claims (4)

In disc cleaning equipment that performs shower cleaning using a rotating brush,
A pair of first rotating brushes for rotating the disk to be cleaned from both the front and back surfaces;
A drive mechanism for rotationally driving the first rotating brush;
A chuck mechanism for chucking the disk rotatably;
A disk cleaning apparatus comprising: a pair of second rotating brushes that sandwich the disk from both front and back sides and apply a load to the rotation of the disk by the first rotating brush.   The first and second rotating brushes are roll brushes, and each has a brush holder for rotatably supporting the first and second roll brushes, and the drive mechanism includes: 2. The disk cleaning device according to claim 1, wherein the first and second roll brushes are driven to rotate through the brush holder, and the rotation speed of the second roll brush is lower than the rotation speed of the first roll brush. .   3. The disk cleaning apparatus according to claim 2, wherein the drive mechanism includes a motor, and the first and second roll brushes are simultaneously driven to rotate by the motor via a gear and a shaft.   Furthermore, it has an abutment mechanism that abuts each pair of brushes of the first and second roll brushes, and the chuck mechanism chucks the outer periphery of the disk with rollers at three points, When the disk is not present, a pair of the first roll brushes and a pair of the second roll brushes are brought into contact with each other by the contact mechanism and driven to rotate. 4. A disk cleaning apparatus according to claim 3, wherein cleaning is performed.

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