JPH081470A - Disk rotation support device - Google Patents

Abstract

(57) [Summary] [Structure] On the back surface side of the disk 1, a disk posture regulation guide 5 having a spindle housing 6 and a disk contact surface 7 is formed at least in the axial direction of the spindle 3.
Preferably, it is provided so as to be able to advance and retreat also in the radial direction of the spindle 3, and air 9 is blown to the surface side of the disk 1 in a direction substantially orthogonal to the disk contact surface 7 while being closely spaced from the disk 1. An air blowing guide 8 is provided so that it can move back and forth. [Effect] Effectively suppressing damage to the disk surface and surface wobbling of the disk due to the attitude control guide of the disk, and further preferably suppressing occurrence of errors in the attitude control of the disk and scratches in the disk surface due to dirt during processing, In addition, the posture adjustment work of the disc posture regulating guide can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk rotation supporting device used when various processing is performed on a disk-shaped carrier such as a magnetic disk and an optical disk, and particularly to one side (front surface or back surface) or both surfaces of the disk. The present invention relates to an improvement of a disk rotation supporting device that can be subjected to various processes.

[0002]

2. Description of the Related Art Generally, in a manufacturing process of a disk such as a magnetic disk or an optical disk, there are processing steps such as polishing the disk, roughening (texturing), or applying a lubricant to the disk. is there. In the process of processing such a disc, for example, FIG.
As shown in FIG. 3, a chuck 204 that can be expanded in the radial direction is provided at the tip of the spindle 203, and the inner edge of the circular locking hole 202 formed in the center of the disk 201 is locked and held by this chuck 204 to rotate the disk 201. A supporting device is used.

At this time, if the chuck 204 is of a type that holds the inner edge of the circular locking hole 202 of the disk 201, the holding position of the disk 201 is held in a normal position orthogonal to the axial direction of the spindle 203. 20
Since the sandwiching portion 4 covers the front and back surfaces around the inner edge of the circular locking hole 202 of the disk 201, the front and back surfaces around the inner edge of the circular locking hole 202 of the disk 201 are necessarily processed surfaces to be processed. Therefore, it is practically impossible to set the entire surface of one side or both sides of the disk 201 as the processing surface to be processed.

Therefore, when the entire surface of one side or both sides of the disk 201 is to be processed, the chuck 2
In 04, a method of locking and holding only the inner edge of the circular locking hole 202 of the disk 201 is adopted, but in this type, since there is no pinching portion for restricting the holding posture of the disk 201, the chuck 204 A fundamental technical problem arises in that the holding posture of the disc 201 tends to tilt when holding the disc 201.

By the way, as a means for solving the technical problem that the holding posture of the disc 201 is easily inclined,
For example, as shown in FIG. 10, on the back surface side of the disc 201, a cylindrical rear guide 205 in which the spindle 203 is loosely fitted is provided so as to be movable back and forth by, for example, an air cylinder 206. While forming a disc contact surface 207 orthogonal to the axial direction of the spindle 203, a front guide 208 is provided on the front surface side of the disc 201 so as to be movable back and forth, for example, by an air cylinder 210, and the disc 201 of the front guide 208 is provided. A disk contact surface 209 is provided on the surface facing the
The disk 201 is sandwiched between the disk contact surface 207 of the rear guide 205 and the disk contact surface 209 of the front guide 208, and in this state, the chuck 204 locks the inner edge of the circular locking hole 202 of the disk 201. The ones that are designed to be retained are provided.

According to this type, the rear guide 20 is provided.
When the disc 201 is sandwiched between the No. 5 and the front guide 208, the posture of the disc 201 is changed to the spindle 203.
Since the chuck 204 is adjusted to a normal shape orthogonal to the axial direction, the concern that the holding posture of the disk 201 is inclined when the inner edge of the circular locking hole 202 of the disk 201 is locked and held by the chuck 204 is effectively avoided.

[0007]

However, in such a conventional disc rotation supporting device, the disc 20 is provided between the rear guide 205 and the front guide 208.
Since 1 is contacted and pinched, not only the fundamental technical problem that the front and back surfaces of the disk 201 are easily scratched remains, but also the disk contact surface 209 of the front guide 208.
Since the pressing force of the disc 201 by the disc varies, the accuracy of the holding posture of the disc 201 by the rear guide 205 and the front guide 208 is limited, and in order to suppress the surface deflection of the disc 201 when the disc 201 is rotationally supported. There was still room for improvement.

Further, in the conventional disk rotation supporting device, the rear guide 205 has a cylindrical shape, and the spindle 203 is loosely fitted in the hole 211 of the rear guide 205. Although the rear guide 205 can be retracted along the axial direction of 203, the rear guide 205 cannot be completely separated from the spindle 203. For this reason, for example, when performing texture processing on a disk substrate of a magnetic disk, for example, a roughening tape with a slurry abrasive is pressed against the surface of the disk substrate with a contact roll, and the contact roll is pressed against the disk substrate. However, dirt such as slurry easily adheres to the rear guide during texture processing, which hinders the posture regulation of the disc 201 and causes scratches in the surface of the disc 201. In addition to technical problems, it is necessary to adjust the posture of the rear guide 205 in advance in order to maintain a good holding posture of the disc 201. However, the posture of the rear guide 205 is adjusted in consideration of the positional relationship with the spindle 203. It is necessary to adjust the posture of the rear guide 205, which is a technical problem. There is a problem.

The present invention has been made in order to solve the above technical problems, and effectively suppresses the damage of the disk surface and the surface wobbling of the disk due to the guide for regulating the attitude of the disk. Provided is a disc rotation supporting device capable of suppressing the disc posture regulation error and the damage on the disc surface due to dirt inside the disc, and simplifying the posture adjustment work of the disc posture regulating guide. Is.

[0010]

That is, the present invention provides:
As shown in FIG. 1, a chuck 4 is provided at the tip of the spindle 3 so that it can be expanded in the radial direction.
In the disk rotation supporting device for locking and holding the inner edge of the locking hole 2 opened in the center of the spindle, a spindle accommodating portion 6 for loosely fitting the spindle 3 is formed on the back surface side of the disk 1 and A disc posture regulation guide 5 having a disc contact surface 7 orthogonal to the axial direction is provided so as to be movable back and forth at least with respect to the axial direction of the spindle 3, and on the surface side of the disc 1 facing the disc posture regulation guide 5. Is air 9 from a direction substantially orthogonal to the disc contact surface 7 in a state of being closely spaced from the disc 1.
Is provided so that the air blowing guide 8 can be moved forward and backward.

In such a technical means, the present invention rotatably supports the disk 1 such as a magnetic disk or an optical disk, and performs predetermined processing (polishing, texturing, lubricant application, etc.) on one surface or both surfaces of the disk 1. ) Is intended.

The disk attitude regulation guide 5 itself is normally moved forward and backward by the forward and backward movement means. For example, the spindle 3 is moved forward and backward by the forward and backward movement means, and the disk attitude regulation guide 5 is moved by the spindle 3. It also includes a mode of moving forward and backward relative to.

Further, the disc contact surface 7 of the disc posture regulation guide 5 may be formed on the guide body as it is, but from the viewpoint of effectively avoiding damage to the disc surface due to contact with the disc contact surface. For example, it is preferable to design so as to buffer the contact impact force with respect to the disc, such as rubber lining the disc contact surface.

Further, with respect to the spindle accommodating portion 6 of the disc attitude regulating guide 5, at least the spindle 3
However, for example, an opening having a width larger than the diameter of the spindle 3 may be provided, and the disk posture regulation guide 5 may be advanced and retracted in the radial direction of the spindle 3 through the opening of the spindle housing 6. It is preferable that the disc posture regulating guide 5 is freely retracted to a position separated from the spindle 3 to prevent dirt such as slurry from adhering to the disc posture regulating guide 5 during the disc processing process.

As for the air blowing guide 8, the air 9 may be blown so that the air pressure acts evenly in the circumferential direction of the disc 1, and the air blowing area is independent of the size of the disc 1. The air blowing area and the air pressure can be optimized according to the size of the disk 1 from the viewpoint of improving the attitude adjustment accuracy of the disk 1. It is preferable.

The air blowing guide 8 itself is normally moved forward and backward by the forward and backward moving means. For example, the spindle 3 is moved forward and backward by the forward and backward moving means, and the air blowing guide 8 is moved to the spindle 3. It also includes a mode of moving back and forth relatively.

[0017]

According to the above-mentioned technical means, the disc carrying device (not shown) sets the disc 1 on the chuck 4 of the spindle 3. At this time, the disc posture regulation guide 5 is moved to the spindle 3 by, for example, an advancing / retreating mechanism.
The disk contact surface 7 is set to a predetermined disk posture regulating surface, and the back side of the disk 1 contacts the disk contact surface 7. On the other hand, the air blowing guide 8 advances by, for example, an advancing / retreating movement mechanism, and is arranged close to and away from the front surface of the disk 1. The air blowing guide 8 blows air 9 onto the front side surface of the disc 1 from a direction substantially orthogonal to the disc contact surface 7, so that the air pressure causes the disc 1 to move toward the disc posture regulating guide 5 side. The disc 1 is pressed, and the rear surface side of the disc 1 is closely arranged to the disc contact surface 7 of the disc posture regulation guide 5, and the disc 1 is regulated in a regular posture (regulating surface along the disc contact surface 7). In this state, if the chuck 4 at the tip of the spindle 3 holds and holds the inner edge of the locking hole 2 of the disk 1, the disk 1 is fixed to the spindle 3 while being held in a normal posture. When the disc 1 is fixed to the spindle 3 in this way, the disc posture regulation guide 5 and the air blowing guide 8 are retracted to a retracted position separated from the disc 1 and then the disc 1 is subjected to predetermined processing. To be done.

Further, the spindle accommodating portion 6 of the disc attitude regulating guide 5 has an opening having a width dimension larger than the diameter dimension of the spindle 3, and the disc attitude is also through the opening of the spindle accommodating portion 6 in the radial direction of the spindle 3. If the regulation guide 5 is provided so as to be able to move back and forth, the disc posture regulation guide 5 can be retracted to a portion separated from the spindle 3 during the processing of the disc 1 and the slurry and the like during the processing of the disc 1 can be prevented. Dirt rarely affects the disc posture regulation guide 5.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. FIG. 2 shows an embodiment of a texture processing facility for a magnetic disk to which the present invention is applied. In the figure, reference numeral 20 is a magnetic disk substrate, 21 is a housing box for housing a large number of magnetic disk substrates 20 to be textured, 22 is the loading of the magnetic disk substrate 20 in the housing box 21, and a disk holding table 23 is provided. A disk guide unit for unloading the magnetic disk substrate 20 on the disk set stage a and setting the magnetic disk substrate 20 on the disk holding table 23.

In this embodiment, the disk holding table 23 intermittently moves four index positions at 90-degree angular intervals, and a rotary support device (not shown) for the magnetic disk substrate 20 is provided at each index position.
Is provided. In addition, the disk holding table 2
The index positions adjacent to the disk set stage a of No. 3 are the first texture processing stage b and the second texture processing stage d, and the texture processing device 30 is installed in each of the texture processing stages b and d. Further, the index position displaced 180 degrees from the disc setting stage a is the cleaning stage c, and a cleaning device (not shown) is installed.

In this embodiment, the magnetic disk substrate 2
A zero rotation support device 40 is shown in FIG. In the figure, reference numeral 41 is a spindle for rotatably supporting the magnetic disk substrate 20, and this spindle 41 is, for example, as shown in FIGS.
As shown in FIG. 3, a flange-shaped chuck 43 is formed around the tip and slits 4 are formed in a part along the axial direction.
4 and a cylindrical outer shaft member 42, and an inner shaft which is provided inside the outer shaft member 42 so as to be able to move forward and backward so as to expand the chuck 43 at the tip end side of the outer shaft member 42 to the outside when retreating. And a circular chuck hole 25 formed in the center of the magnetic disk substrate 20.
The magnetic disk substrate 20 is fixed by locking and holding the chuck 43 expanded on the inner edge.

In particular, in this embodiment, the attitude guides 51 and 61 for restricting the attitude of the magnetic disk substrate 20 are rotatably supported only at a position corresponding to the disk set stage a, regardless of the rotation of the disk holding table 23. It is attached to the device 40. Reference numeral 51 is a rear guide provided on the back surface side of the magnetic disk substrate 20 for regulating the attitude of the magnetic disk substrate 20. This rear guide 51
As shown in FIG. 5, the inner space 52 is made of, for example, aluminum and has a substantially U-shaped vertical cross section. The inner space 52 of the inner space 52 functions as a housing for the spindle 41.
The width dimension s1 of the lower opening 53 is larger than the outer diameter s of the general portion of the spindle 41. Further, a rear guide 51 facing the back side of the magnetic disk substrate 20.
The surface is formed as a surface orthogonal to the axial direction of the spindle 41, and the rear guide 51 surface is provided with a rubber lining 54. Further, the rear guide 51 is provided with an X-axis for the first forward / backward drive via an inverted L-shaped support bracket 55.
Direction (corresponding to radial direction of spindle 41) Air cylinder 5
6 and a second Y-direction (corresponding to the axial direction of the spindle 41) air cylinder 57 for advancing and retracting drive, and the X-direction air cylinder 56 and the Y-direction air cylinder 57 are both advanced to set the position regulation set position. Is set to
On the other hand, by retracting both the X-direction air cylinder 56 and the Y-direction air cylinder 57, the retracted position separated from the spindle 41 is set.

Reference numeral 61 is a front guide which is provided on the front surface side of the magnetic disk substrate 20 and is arranged to face the rear guide 51. This front guide 61 is
For example, as shown in FIG. 6, an air reservoir recess 63 communicating with the air supply source 62 is formed on the surface of the guide body 66, and a nozzle plate 67 is attached so as to close the air reservoir recess 63. Is composed of an air blowing unit which is connected to the air reservoir recess 63 and has a large number of nozzles 65 for uniformly blowing air 64 around the chuck holes 25 on the surface of the magnetic disk substrate 20. Further, the front guide 61 is connected to the rear guide 51, for example, and is set to a position regulation set position which is close to and separated from the surface of the magnetic disk substrate 20 when the rear guide 51 is set to the position regulation set position. X
By the direction air cylinder 56 and the Y direction air cylinder 57, the rear guide 51 and the rear air guide 51 are set at a retracted position separated from the spindle 41.

Next, the operation of the rotation support device 40 in the disc set stage a according to this embodiment will be described with reference to FIG. 2, the disk guide unit 22 conveys the magnetic disk substrate 20 to the disk set stage a of the disk holding table 23 and places it on the chuck 42 portion of the spindle 41 shown in FIG. At this time, the rear guide 51 and the front guide 61 are set to the position regulation set position (shown by the solid line in FIG. 7) by advancing the X direction air cylinder 56 and the Y direction air cylinder 57.

Thereafter, the air 64 of a predetermined pressure is supplied from the air supply source 62 to the front guide 61, and the magnetic disk substrate 20 is passed through the nozzle portion 65 of the front guide 61.
The periphery of the chuck hole 25 on the surface is pressed uniformly. Then
The air pressure from the front guide 61 pushes the magnetic disk substrate 20 toward the rear guide 51,
The rear surface side of the magnetic disk substrate 20 is closely arranged on the rubber contact lined disk contact surface of the rear guide 51,
The magnetic disk substrate 20 is regulated in a regular posture (a regulation surface along the disc contact surface).

At this time, the front guide 61 is not in contact with the magnetic disk substrate 20, and the air 64 blown from the front guide 51 onto the magnetic disk substrate 20.
Is a constant low pressure, while the contact portion of the rear guide 51 with the magnetic disk substrate 20 is covered with the rubber lining 54, the portions of the magnetic disk substrate 20 facing the front guide 61 and the rear guide 51 may be damaged. There is no.

In this state, the chuck 42 at the tip of the spindle 41 locks and holds the inner edge of the chuck hole 25 of the magnetic disk substrate 20, and the magnetic disk substrate 20 is fixed to the spindle 41 while being held in the normal posture. .
In this way, the magnetic disk substrate 20 is mounted on the spindle 41.
When fixed to, the X-direction air cylinder 56 and the Y-direction air cylinder 57 retract the rear guide 51 and the front guide 61 to a retracted position separated from the magnetic disk substrate 20, and thereafter, as shown in FIG. The disk holding table 23 rotates by 90 degrees, and the magnetic disk substrate 20 to be processed is conveyed to the texture processing stage b.

Then, the magnetic disk substrate 20 carried into the texture processing stage b is processed by the texture processing device 30.
Is textured. Details of the texture processing device 30 in this embodiment are shown in FIG. In the figure, the texture processing device 30 is a texture head 131.
The texture head 131 has a tape reel unit 133 that moves back and forth between the processing position and the standby position along the first guide rail 132, and the tape reel unit 133 is separately and independently separated. A contact roll unit 135 that moves back and forth between the processing position and the standby position along the second guide rail 134 is provided.

Tape reel unit 1 according to this embodiment
33 is a feeding tape reel 137 for feeding a roughening tape 136 such as a tape with slurry abrasive,
Two sets of winding tape reels 138 for winding the roughening tape 136 are installed on the unit base 139. In this embodiment, the feeding direction of the roughening tape 136 can be reversed by reversing the positional relationship and the rotating direction of the feeding tape reel 137 and the take-up tape reel 138 according to the processing conditions. Is.

On the other hand, the contact roll unit 135 according to this embodiment has a pair of contact rolls 141 and 142 for pressing the front surface and the back surface of the magnetic disk substrate 20 held by the spindle 41 of the disk holding table 23.
Is provided on the unit base 140, and the tape reel unit 133 is attached to each of the contact rolls 141 and 142.
The tape 136 for roughening the fabric is appropriately wound around, and is further swung along the radial direction of the magnetic disk substrate 20 by an oscillation mechanism 160 including, for example, a drive motor and an eccentric cam mechanism.

Therefore, this texturing stage b
In (or d), the spindle 41 rotates to rotate the magnetic disk substrate 20 at a predetermined speed, while
After the texture processing device 30 has advanced to the processing position,
The contact roll unit 135 is oscillated along the radial direction of the magnetic disk substrate 20 by the oscillation mechanism 160, and the surface 136 and the back surface of the magnetic disk substrate 20 are made by the roughening tape 136 hung over the contact rolls 141, 142. Upset your eyes.

At this time, since the holding attitude of the magnetic disk substrate 20 with respect to the spindle 41 is set to the normal attitude by the attitude guides (rear guide 51, front guide 61), the surface wobbling of the magnetic disk substrate 20 is 10 μm.
It can be understood that the number is suppressed to the following level, which is a significant improvement over the conventional method of FIG. Therefore, the accuracy of the texture processing is further improved, and the degree of roughening of the front surface and the back surface of the magnetic disk substrate 20 is kept more uniform.

Further, in this embodiment, since the rear guide 51 is retracted in a state of being separated from the spindle 41, even if slurry or the like scatters during the texturing process, the rubber-lined disk 54 of the rear guide 51 is disc-shaped. The situation of adhering to the contact surface is effectively avoided. For this reason, the rubber-lined disk contact surface of the rear guide 51 on the disk set stage a is contaminated with slurry or the like, the posture regulation accuracy of the magnetic disk substrate 20 is impaired, and the inside of the magnetic disk substrate 20 is scratched. There are very few concerns.

Further, in this embodiment, since the rear guide 51 is attached to the support bracket 55 in a state where it is separated from the spindle 41, the rear guide 51 is different from the cylindrical rear guide in which the spindle 41 is still inserted, for example. It becomes easy to adjust the mounting posture of 51. Further, when the magnetic disk substrates 20 of different sizes are textured, that is, when a job is changed, it is only necessary to replace the parts. Therefore, the conventional method adjusts or pushes the gap between the rear guide and the front guide. Job change is easier than having to adjust the pressure.

Further, in this embodiment, even if the size of the magnetic disk substrate 20 is different, the air blowing position from the front guide 61 is constant, but the spindle 41 of the magnetic disk substrate 20 is changed for each different size. In order to optimize the holding posture with respect to, for example, FIG.
As shown in (c), a ring-shaped air reservoir recess 6 having a different diameter is formed on the surface of the guide body 66 of the front guide 61.
A plurality of 3a, 63b are formed, while the nozzle plate 67 attached to the guide body 66 is provided with the air reservoir recesses 63.
By opening nozzles 65a and 65b, which are connected to a and 63b, respectively, and selecting air supply paths A and B from an air supply source with a switching valve in accordance with the size of the magnetic disk substrate 20, for example, Reservoir recess 63a or 6
It is preferable to supply air to any of 3b and change the blowing position of the air 64 for each magnetic disk substrate 20 of different size.

[0036]

As described above, according to the present invention, in the disk rotation supporting device in which the chuck of the spindle locks and holds the inner edge of the locking hole of the disk, the back surface of the disk contacts the back surface of the disk. While a disc attitude control guide is provided to move forward and backward, an air blowing guide that is placed close to the disc is provided to move forward and backward on the surface side of the disc, and the disc is guided by air pressure from the air blowing guide. Since it is possible to fix the disc to the spindle in the state where it is in close contact with the disc contact surface, the surface side of the disc is non-contact compared to the conventional contact method with the disc contact surface, and , The pressing force of the disk is only a certain low pressure air pressure, so not only can the disk scratch be effectively avoided, but the disk is locked by the air. Since it is easy to equalize the pressing pressure around the surface, the surface run-out during disk rotation can be kept smaller than in the conventional method (when the disk abutting surface is held, the contact pressure tends to change depending on the contact state, etc.). You can

Further, in the present invention, by devising the spindle accommodating portion of the disc posture regulation guide, the disc posture regulation guide can be retracted to a portion separated from the spindle. Can effectively prevent the situation where the disc adheres to the disc posture regulation guide, which reduces the disc posture regulation accuracy and scratches in the disc surface, and the posture of the disc posture regulation guide is separated from the spindle. It becomes possible to adjust the posture of the disc posture regulation guide by that much, and it is also possible to change the pressing condition at the time of job change (replacement of each disc to be processed, etc.). It will be possible to easily change jobs accordingly. Kill.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a disk rotation support device according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a texture processing facility for a magnetic disk to which the present invention is applied.

FIG. 3 is an explanatory diagram showing an example of a rotation support device for a magnetic disk substrate according to an example.

FIG. 4 is an explanatory diagram showing an example of a chuck portion structure of a spindle according to an embodiment.

5 is a cross-sectional view taken along line VV in FIG. 5 of the rear guide according to the example.

FIG. 6A is an internal structure of the front guide according to the embodiment, and FIG. 6B is an explanatory view of the nozzle portion as viewed from the front.

FIG. 7 is an explanatory diagram showing an operating state of the rotation support device for the magnetic disk substrate according to the embodiment.

8A is a sectional view showing a modified example of the front guide according to the embodiment, FIG. 8B is an explanatory view showing the nozzle plate of FIG. 8A, and FIG. 8C is an explanation showing the guide body of FIG. It is a figure.

FIG. 9 is an explanatory diagram showing an example of a texture processing apparatus according to an embodiment.

FIG. 10 is an explanatory diagram showing an example of a conventional rotation support device for a magnetic disk.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc, 2 ... Locking hole, 3 ... Spindle, 4 ... Chuck, 5 ... Disc attitude regulating guide, 6 ... Spindle accommodating portion, 7 ... Disc contact surface, 8 ... Air blowing guide, 9
…air

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yukihiro Asano Central 4-1-21 Yonezawa, Yamagata Prefecture Copiers Yonezawa 201 (72) Inventor Shohei Senda 4-1-21 Central Yonezawa, Yamagata Prefecture Copiers Yonezawa 511

Claims (2)

[Claims] 1. A chuck (4) which can be expanded in the radial direction is provided at the tip of a spindle (3), and the inner edge of a locking hole (2) opened at the center of the disc (1) is provided by this chuck (4). In the disk rotation support device for locking and holding, a spindle accommodating portion (6) in which the spindle (3) is loosely fitted and arranged is formed on the back surface side of the disk (1) and is orthogonal to the axial direction of the spindle (3). A disc attitude regulating guide (5) having a disc contact surface (7) is provided so as to be movable back and forth at least in the axial direction of the spindle (3), and the disc (5) facing the disc attitude regulating guide (5) is provided. On the surface side of 1), an air blowing guide (8) is blown with air (9) from a direction substantially orthogonal to the disc contact surface (7) in a state of being closely spaced from the disc (1).
A disk rotation support device characterized in that it is provided so as to move back and forth. 2. The disk posture regulating guide according to claim 1, wherein the spindle accommodating portion (6) of the disc posture regulating guide (5) has an opening having a width larger than a diameter of the spindle (3). A disk rotation supporting device (5) is provided so as to be movable back and forth in the radial direction of the spindle (3) through an opening of the spindle accommodating portion (6).