JPH08161745A - Disk holding device - Google Patents

Abstract

PURPOSE: To well cope with the reduced diameter of a disk and the increased speed of disk treatment, and at the same time prevent the contamination of a disk due to fine powder and to improve also the positioning accuracy of the disk with an extremely simple configuration in a disk holding device. CONSTITUTION: In a disk holding device 20A, a circular hole 1A of a disk 1 is inserted into a disk retention rod 22A, the circular hole inner-periphery part of the disk 1 is engaged to a retention groove 31 provided on the rod 22A, and the disk 1 can be retained. The retention groove 30 is provided with a disk introduction taper part 41, a disk positioning part 42, and a disk support arcuate part 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk holding device such as a magnetic disk.

[0002]

2. Description of the Related Art For a disk which is not allowed to have scratches on the disk surface such as a magnetic disk used by forming a magnetic recording layer on the disk surface, handling before forming a magnetic recording layer, magnetic recording It is necessary to use a disc holding device that does not grip the disc surface when handling after forming layers and the like.

However, as a conventional disk holding device, the one described in JP-A-60-254421 is used. In this conventional disc holding device, a mechanical chuck is built in a disc holding rod, and the mechanical chuck grips the inner peripheral portion of the circular hole of the disc.

[0004]

However, the conventional disk holding device has the following problems. A mechanical chuck is built in the disc holding rod, and it is necessary to have a built-in structure of chuck claws, an opening / closing structure of chuck claws, etc., and the configuration is very complicated.

Since the disk holding rod has a built-in mechanical chuck, it is difficult to reduce the diameter, and it is very difficult to cope with the reduction in the diameter of the disk.

When the disc is held by the disc holding rod, it is necessary to open and close the mechanical chuck at a timing, and it is very difficult to cope with the speeding up of the disc processing.

Since the disk holding rod has a built-in mechanical chuck, it is difficult to avoid generation of fine particles such as abrasion powder due to the operation of the mechanical chuck, and there is a risk of disk contamination.

Since the inner circumference of the circular hole of the disk is held by the mechanical chuck built in the disk holding rod, it is difficult to improve the positioning accuracy of the disk.

When attempting to hold a large number of discs on the disc holding rod, a large number of mechanical chucks are built in the disc holding rod, but it is difficult to reduce the size of each mechanical chuck, and a large number of discs can be held simultaneously. Have difficulty.

When a disc holding rod is mounted on a disc handling robot or the like, when handling discs of different shapes, it is necessary to replace the disc holding rod with a mechanical chuck different for each disc shape. However, it takes a long time to change the setup, and it is difficult to improve the operating rate of the disk processing device.

According to the present invention, in the disc holding device, the disc can be made smaller in diameter and the disc can be processed at a higher speed with an extremely simple structure, the disc can be prevented from being contaminated by fine powder, and the disc positioning accuracy can be improved. The purpose is to

Another object of the present invention is to enable a disk holding device to hold a large number of disks at the same time.

Another object of the present invention is to make it possible for a disk holding device to hold a plurality of types of disks without setup change and to improve the operating rate of the disk processing device.

[0014]

According to a first aspect of the present invention, a circular hole of a disc is inserted into a disc holding rod, and a holding groove formed on the rod engages an inner peripheral portion of the circular hole of the disc. A disk holding device capable of holding and holding the disk, wherein the holding groove has a disk introducing taper portion for guiding both side portions of a circular hole of the disk and a disk introduced by being guided by the disk introducing taper portion. It has a disc positioning portion for positioning between both side wall surfaces, and a disc supporting arc portion which has the same curvature as the circular hole of the disc positioned by the disc positioning portion and is in surface contact with the circular hole.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the cross section orthogonal to the circular arc of the disc supporting circular arc portion in the holding groove of the disc holding rod has a circular hole on both sides of the disc. The chamfered portion provided at the edge has a V-groove shape with the same chamfering angle.

According to a third aspect of the present invention, in addition to the first or second aspect of the present invention, a plurality of holding grooves in which the disc holding rod has the same groove shape at a plurality of longitudinal positions of the rod are provided. And the disc supporting arcs of the holding grooves are arranged concentrically with each other.

The present invention according to claim 4 provides the invention according to claims 1 to 3.
Further, in the present invention described in any one of the above, the disc holding rod is capable of holding a plurality of types of discs having different disc thicknesses, and varies depending on the type of the disc at a plurality of longitudinal positions of the rod. A plurality of sets of groove-shaped holding grooves are provided.

The present invention according to claim 5 provides the invention according to claims 1 to 3.
In the present invention according to any one of the above, further, the disc holding rod is capable of holding a plurality of types of discs having different circular hole shapes, depending on the type of the disc at a plurality of longitudinal positions of the rod. A plurality of holding grooves having different groove shapes are provided.

The present invention according to claim 6 is based on claims 1 to 3.
In any one of the present inventions, the disc holding rod is capable of holding a plurality of types of discs having different disc thicknesses, and different groove shapes depending on the type of the disc at the same position in the longitudinal direction of the rod. Is provided with a plurality of holding grooves.

[0020]

According to the present invention described in claim 1, the following (1)
There is an action of (5). (1) With a simple configuration in which a holding groove having a disc introduction taper portion, a disc positioning portion, and a disc supporting arc portion is provided on the disc holding rod, the disc inserted into the rod is held in the holding groove. Can be held securely. still,
The disc engaged in the holding groove is sandwiched between both side walls of the disc positioning part to prevent the disc from swinging in the axial direction of the rod, and the circular hole of the disc is seated on the circular arc portion of the disc supporting the same curvature as the circular hole. The rod is prevented from swinging around the rod axis, and as a result, the rod is quickly stopped at a predetermined position and stably held.

(2) Only by providing the disc holding rod with a holding groove having a simple shape, the diameter of the rod can be easily reduced, and the disc can be easily reduced in diameter.

(3) The disk can be held only by engaging the inner peripheral portion of the circular hole of the disk inserted in the disk holding rod with the holding groove, and it is possible to cope with speeding up of disk processing.

(4) Since it is a stationary body only having a holding groove in the disc holding rod and has no movable part, fine particles such as abrasion powder are not generated and the disc contamination can be prevented.

(5) The disc positioning portion of the holding groove provided on the disc holding rod and the disc supporting arc portion can accurately and stably hold the disc at a predetermined position, thereby improving the disc positioning accuracy.

According to the invention of claim 2, the following (6)
Has the effect of (6) The cross section orthogonal to the circular arc of the disc supporting circular arc portion in the holding groove of the disc holding rod forms a V groove shape having the same angle as the chamfering angle of the chamfered portions provided on both side edges of the circular hole of the disc. By doing so, it is possible to stabilize the seated state of the disc with respect to the disc supporting arc portion, further improve the speed of disc processing, and further improve the disc positioning accuracy.

According to the invention of claim 3, the following (7)
Has the effect of (7) The space occupied by the holding groove provided on the disc holding rod is small, and a large number of holding grooves can be easily juxtaposed in the longitudinal direction of the disc holding rod. Therefore, a large number of holding grooves can be provided on the disk holding rod to hold a large number of disks at the same time. At this time, since the disc supporting arcs of the holding grooves are arranged concentrically with each other, the discs can be positioned concentrically with each other.

According to the invention of claim 4, the following (8)
Has the effect of (8) A disc holding rod is capable of holding a plurality of types of discs having different disc thicknesses, and a plurality of sets of holding grooves having different groove shapes are formed at a plurality of longitudinal positions of the rod according to the type of the disc. With the provision, it is possible to hold a plurality of types of discs having different disc thicknesses without replacing the rod, and it is possible to improve the operating rate of the disc processing apparatus.

According to the invention of claim 5, the following (9)
Has the effect of (9) The disc holding rod is capable of holding a plurality of types of discs having different circular hole shapes, and a plurality of holding grooves having different groove shapes are formed at a plurality of longitudinal positions of the rod depending on the type of the disc. With the provision, it is possible to hold a plurality of types of discs having different circular hole shapes without replacing the rod, and it is possible to improve the operating rate of the disc processing device.

According to the present invention described in claim 6, the following (10)
Has the effect of (10) A disc holding rod is capable of holding a plurality of types of discs having different disc thicknesses, and a plurality of holding grooves having different groove shapes depending on the type of the disc are provided at the same position in the longitudinal direction of the rod. By doing so, it is possible to hold a plurality of types of discs with different disc thicknesses without replacing the rod, and it is possible to improve the operating rate of the disc processing apparatus.

[0030]

1 is a schematic diagram showing a magnetic recording layer forming device, FIG. 2 is a schematic diagram showing a disk holding device, FIG. 3 is a schematic diagram showing a disk transfer state by the disk holding device, and FIG. 4 is a disk holding device. 7 is a schematic view showing a first embodiment of the present invention, FIG. 5 is a schematic view showing a disk holding state by the disk holding device, FIG. 6 is a schematic view showing a second embodiment of the disk holding device, FIG.
Is a schematic diagram showing a third embodiment of the disc holding device, FIG. 8 is a schematic diagram showing a fourth embodiment of the disc holding device, FIG. 9 is a schematic diagram showing a fifth embodiment of the disc holding device, and FIG. 10 is a disc. FIG. 11 is a schematic diagram showing a disk shake damping state by the holding device, and FIG. 11 is a schematic diagram showing an embodiment of an overload prevention device.

The magnetic recording layer forming device 10 forms a magnetic recording layer on the surface of the disk 1. As shown in FIG. 1, a load robot 11, an unload robot 12, an empty cassette traverse device 13, and a pallet 14 are provided. , Sputter chamber 1
5, it has a return device 16 and an elevator 17, and operates as follows. The robots 11 and 12 have the same disk holding device 20 (20A to 20E described later),
The disc holding device 20 is configured by including two disc holding rods 22 (22A to 22E described later) on a rod support 21 provided on the hands 11A and 12A.

(1) A large number of discs 1 are held by a large number of disc holding portions 2A provided in the cassette 2 in multiple rows and carried into the loading position.

(2) The rod support 21 provided on the hand 11A of the load robot 11 at the loading position.
The disc holding rods 22 supported by the discs are inserted into the circular holes 1A of the large number of discs 1 in the cassette 2, and the holding grooves 30 are provided at the plural longitudinal positions of the rods.
(31, 32, 33A to 33C, 34A to 34 described later
C, 35A, 35B) are engaged with the inner peripheral portion of the circular hole 1A of each disc 1, and a large number of discs 1 are simultaneously held and ejected out of the cassette 2 (FIG. 3).

At this time, the rod support 21 has the two disc holding rods 22 as described above. However, the rod support 21 may have a single disc holding rod 22, or may have three or more disc holding rods 22 in multiple rows.

(3) The load robot 11 transfers the large number of disks 1 held by the disk holding rods 22 to the disk holding portion 14A in the pallet 14 positioned at the loading position. The pallet 14 enters the sputtering chamber 15 to form a magnetic recording layer on the surface of the disk 1, and then is positioned at the unloading position by the return device 16 and the elevator 17.

(4) The empty cassette 2 from which the disc 1 has been ejected at the loading position is conveyed to the unloading position by the empty cassette traverse device 13.

(5) The unload robot 12 uses the hand 1
The disc holding rods 22 supported by the rod supports 21 provided in 2A are inserted into the circular holes 1A of a large number of discs 1 in the pallet 14 and held at a plurality of positions in the longitudinal direction of the rods. Each disk 1 in the groove 30
The inner peripheral portion of the circular hole 1A is engaged (FIG. 3 (A)), a large number of discs 1 are simultaneously held and ejected out of the pallet 14 (FIG. 3 (B)). The empty pallet 14 moves to the loading position.

(6) The unload robot 12 transfers the magnetic recording layer-formed disk 1 held by the disk holding rod 22 to the disk holding portion 2A of the empty cassette 2 positioned at the unloading position ( Figure 3
(C)). The cassette 2 on which the disc 1 is transferred is conveyed to the next step. The cassette 2 may be in the form of a container or a stand.

The disk holding device 20 and the overload prevention device 60 of the disk holding device 20 will be described below. (A) Disc holding device 20 (first embodiment) (FIGS. 4 and 5) The holding groove 31 of the disc holding rod 22A of the disc holding device 20A according to the first embodiment is provided with a disc introduction table as shown in FIG. -It has a pad portion 41, a disc positioning portion 42, and a disc supporting arc portion 43.

The disk introduction taper section 41 is used for the disk 1
Guide both sides of the circular hole 1A. Disk positioning part 4
The reference numeral 2 positions the disc 1 introduced by being guided by the disc introducing taper portion 41 between the vertical surfaces on both sides. The disc supporting arc portion 43 has the same curvature as the circular hole 1A of the disc 1 positioned by the disc positioning portion 42 and comes into surface contact with the circular hole 1A.

Further, in the disc holding rod 22A, the holding grooves 31 provided at the plural positions in the longitudinal direction of the rod 22A have the same groove shape, and the disc supporting arc portions 43 of the holding grooves 31 are mutually arranged. It is supposed to be concentric.

The operation of this embodiment will be described below. On the disc holding rod 22A, the disc introducing taper portion 41, the disc positioning portion 42, and the disc supporting arc portion 4 are provided.
The disk 1 inserted into the rod 22A can be reliably held in the holding groove by a simple structure in which the holding groove 31 having the number 3 is provided. The disc 1 engaged with the holding groove 31 is sandwiched between the vertical surfaces on both sides of the disc positioning portion 42 to prevent the disc 1 from swinging in the axial direction of the rod, and the circular hole 1A of the disc 1 is referred to as the circular hole 1A. It is seated on the disk supporting arc portion 43 having the same curvature to prevent the swinging around the rod axis, and as a result, it is quickly stopped and stably held at a predetermined position.

By simply providing the holding groove 31 of a simple shape in the disc holding rod 22A, the diameter of the rod 22A can be easily reduced, and the disc 1 can be easily reduced in diameter.

The disk 1 can be held only by engaging the inner circumferential portion of the circular hole of the disk 1 inserted in the disk holding rod 22A with the holding groove 31, and it is possible to cope with the speeding up of the disk processing.

A holding groove 31 is formed in the disc holding rod 22A.
Since it is a stationary body having no moving parts and no moving parts, fine particles such as abrasion powder are not generated, and disk contamination can be prevented.

The disc positioning portion 42 of the holding groove 31 provided on the disc holding rod 22A and the disc supporting arc portion 43 can accurately and stably hold the disc 1 at a predetermined position and improve the positioning accuracy of the disc 1.

The holding groove 31 provided in the disc holding rod 22A occupies a small space, and a large number of holding grooves 31 can be easily juxtaposed in the longitudinal direction of the disc holding rod 22A. Therefore, a large number of holding grooves 31 are provided in the disc holding rod 22A, and a large number of discs 1 can be held simultaneously. At this time, since the disk supporting arc portions 43 of the holding grooves 31 are arranged concentrically with each other, the disks 1 can be positioned concentrically with each other.

FIG. 5A shows a disk holding state by the disk holding device 20A. The disk holding device 20
In A (the same applies to the disk holding devices 20B to 20E described later), as shown in FIG. 5B, a stabilizer 51 that holds the outer peripheral portion of the large number of disks 1 held in each holding groove 31 is provided. It may be used together to stabilize each disk 1 on the disk holding rod 22A.

(Second Embodiment) (FIG. 6) The holding groove 32 of the disk holding rod 22B of the disk holding device 20B of the second embodiment is the same as the holding groove 31 of the first embodiment as shown in FIG. Disk introduction taper part 4
1, disk positioning portion 42, disk supporting arc portion 43
In addition, the cross section orthogonal to the circular arc of the disc supporting arc portion 43 has a V-groove shape (the same as the chamfering angle of the chamfered portion 1B provided on both side edges of the circular hole 1A of the disc 1 ( The V groove portion 43A) is formed.

According to this embodiment, there are the following actions. A V-shaped groove whose cross section orthogonal to the circular arc of the disc supporting arc portion 43 in the holding groove 32 of the disc holding rod 22B has the same angle as the chamfering angle of the chamfered portion 1B provided on both side edges of the circular hole 1A of the disc 1. With this shape, the seated state of the disk 1 on the disk supporting arc portion 43 can be stabilized, the speed of disk processing can be further improved, and the positioning accuracy of the disk 1 can be further improved.

(Third Embodiment) (FIG. 7) As shown in FIG. 7, the disk holding rod 22C of the disk holding device 20C of the third embodiment has a disk thickness (ta,
tb, tc) different types (three types in this embodiment)
Discs 1 (1ta, 1tb, 1tc) can be held, and the type of the disc 1 ((1ta, 1t, 1t
b, 1tc) three sets of holding grooves 33 having different groove shapes.
A to 33C are provided.

The holding grooves 33A to 33C having different groove shapes are
The disc holding rods 22C are arranged adjacent to each other in the longitudinal direction. In addition, holding grooves 33A (33B or 3) having the same groove shape
3C) are repeatedly arranged in the longitudinal direction of the disk holding rod 22C at every pitch interval p of the adjacent disk holding portions 2A in the cassette 2.

Each holding groove 33A to 33C has a disk introducing taper portion 41, a disk positioning portion 42, and a disk supporting arc portion 43 (V groove portion 43A) similar to the holding groove 32 of the second embodiment. ing.

According to this embodiment, there are the following effects. The disc holding rod 22C is capable of holding a plurality of types of discs 1 (1ta, 1tb, 1tc) having different disc thicknesses, and different grooves depending on the type of the disc 1 at a plurality of longitudinal positions of the rod 22C. By providing a plurality of sets of holding grooves 33A to 33C in a shape, a plurality of types of discs 1 (1ta, 1ta, 1ta, 1ta,
tb, 1tc) can be held and the magnetic recording layer forming apparatus 1
The operating rate of 0 can be improved.

(Fourth Embodiment) (FIG. 8) As shown in FIG. 8, the disk holding rod 22D of the disk holding device 20D of the fourth embodiment has circular hole curvatures (ra, r).
b, rc) can hold a plurality of types (three types in this embodiment) of discs 1 (1ra, 1rb, 1rc), and the types of discs 1 at three positions in the longitudinal direction of the rod 22D ( 1ra, 1rb, 1rc), and three sets of holding grooves 34A to 34C having different groove shapes are provided.

The holding grooves 34A to 34C having different groove shapes are
The disc holding rods 22D are arranged adjacent to each other in the longitudinal direction. In addition, holding grooves 34A (34B or 3) having the same groove shape
4C) are repeatedly arranged in the longitudinal direction of the disc holding rod 22D at every pitch interval p of the disc holding portions 2A adjacent to each other in the cassette 2.

Each holding groove 34A to 34C has a disk introducing taper portion 41, a disk positioning portion 42, and a disk supporting arc portion 43 (V groove portion 43A) similar to the holding groove 32 of the second embodiment. .

According to this embodiment, there are the following actions. The disc holding rod 22D is capable of holding a plurality of types of discs 1 (1ra, 1rb, 1rc) having different circular hole shapes, and varies depending on the type of the disc 1 at a plurality of longitudinal positions of the rod 22D. By providing a plurality of groove-shaped holding grooves 34A to 34C, a plurality of types of discs 1 (1ra, 1rb, 1rc) having different circular hole shapes can be obtained without replacing the rod.
Can be maintained, and the operating rate of the magnetic recording layer forming apparatus 10 can be improved.

(Fifth Embodiment) (FIG. 9) As shown in FIG. 9, the disk holding rod 22E of the disk holding device 20E of the fifth embodiment has a disk thickness (ta,
It is possible to hold a plurality of types (two types in this embodiment) of discs 1 (1ta, 1tb) having different tb), and depending on the types (1ta, 1tb) of the discs 1 at the same position in the longitudinal direction of the rod 22E. And two sets of holding grooves 35A and 35B having different groove shapes are provided.

The holding groove 35B is similar to the holding groove 32 of the second embodiment in that the disc introducing taper portion 41, the disc positioning portion 42, and the disc supporting arc portion 43 (V groove portion 43A).
Have. Further, the holding groove 35B causes the disc supporting arc portion 43 (V groove portion 43A) of the holding groove 35A to function as the disc introducing taper portion 41 of the holding groove 32 of the second embodiment, and also the disc positioning portion 42 and the disc supporting arc portion. Disk positioning portion 5 similar to 43 (V groove portion 43A)
2. It has a disk supporting arc portion 53 (V groove portion 53A).

According to this embodiment, there are the following effects. The disc holding rod 22E is capable of holding a plurality of types of discs 1 (1ta, 1tb) having different disc thicknesses, and a plurality of groove-shaped discs having different groove shapes are provided at the same position in the longitudinal direction of the rod 22E depending on the type of the disc 1. By providing the holding grooves 35A and 35B, it is possible to hold a plurality of types of disks 1 (1ta, 1tb) having different disk thicknesses without changing the rod, and improve the operating rate of the magnetic recording layer forming apparatus 10. it can.

FIG. 10 shows a disk holding device 2 of this embodiment.
2 is an experimental result showing the effect of the shape of the holding groove 30 included in 0 on the vibration damping of the disk 1. In the experiment, the shake state of the disc 1 (the shake of the rod 22 in the axial direction) is measured by a laser range finder when the disc 1 is held in the holding groove 30 of the disc holding rod 22 and the movement of the rod 22 is stopped. It is a servant. (A) is a holding groove 30 having a simple V-shaped groove, and (B) is a holding groove having a disk introducing taper portion 41, a disk positioning portion 42, and a disk supporting arc portion 43 as in the holding groove 31 of the first embodiment. Groove 30
(C) shows the disk introducing taper portion 41 and the disk positioning portion 4 as in the holding groove 32 of the second embodiment.
2. The holding groove 30 having the disk supporting arc portion 43 (V groove portion 43A). The shake damping effect of the disk 1 becomes good in the order of (A), (B), and (C).

(B) Overload prevention device 60 of the disc holding device 20 The disc holding device 20 is constructed such that the disc 1 held by the disc holding rod 22 is caught by the disc holding portions 2A, 14A of the cassette 2 or the pallet 14, for example. ,
An overload prevention device 60 is provided for promptly eliminating an overload acting on the disc holding rod 22 (in this embodiment, an overload acting in the axial direction of the rod 22).

The overload prevention device 60 includes the rod support 21.
The bearing 61 (supporting means) is provided in the
The disc holding rod 22 is supported by the rod support 21 so as to be displaceable (slideable) in the direction of overload.

The overload prevention device 60 includes the rod support 21.
Is provided with a fixed magnet 62 and a movable magnet 63 that attracts the fixed magnet 62, and the movable magnet 63 is supported by the bearing 64 on the rod support 21 so as to be displaceable (sliding) in the overload acting direction. There is. In addition, the overload prevention device 60 includes a magnet 65 that attracts the movable magnet 63 at the end of the disk holding rod 22. Magnets 62, 6
Numerals 3 and 65 constitute a positioning means, and the magnet 62 is connected to the magnet 63.
Is used as the positioning force, and the magnetic force that causes the magnet 65 to be attracted to the magnet 63 is used as the positioning force. The positioning force allows the disk holding rod 22 to be positioned at a fixed position.

In the overload prevention device 60, (a) when a pushing overload acting on the disc holding rod 22 exceeding the attractive magnetic force between the magnet 62 and the magnet 63 is applied, the magnet 63 separates from the magnet 62, resulting in Disc holding rod 22
Is deviated from a fixed position, and this misregistration is detected by the misregistration detector 66.
Can be detected by. Further, (b) when a tensile overload exceeding the attraction magnetic force between the magnet 63 and the magnet 65 acts on the disk holding rod 22, the magnet 65 separates from the magnet 63,
As a result, the disc holding rod 22 is displaced from the home position,
The occurrence of this deviation can be detected by the position deviation detector 67. The position shift detectors 66 and 67 are, for example, proximity switches, the position shift detector 66 detects the movement of the stopper 66A integrated with the movable magnet 63 from the original position, and the position shift detector 67 is integrated with the disc holding rod 22. Stopper 6
The movement from the original position of 7A is detected.

The overload prevention device 60 has a control device 68. When the positional deviation detectors 66, 67 detect the deviation of the disc holding rod 22 from the fixed position, the control device 68 causes the rod support 21 to be in a safe position (overload does not act on the rod 22). The robots 11 and 12 are controlled so as to avoid the disc 1 held on the rod 22 and the disc holding portions 2A and 14A of the cassette 2 and the pallet 14 from being caught.

The overload prevention device 60 prevents the rod support body 21 from the safe position described above by the control device 68, and then the assist cylinder 7 provided in the rod support body 21.
The above-mentioned stoppers 66A and 67A are pushed back to their original positions by 1, 72, and as a result, the attraction between the magnets 62 and 63 and the attraction between the magnets 63 and 65 are restored, so that the disk holding rod 22 is again positioned at the fixed position.

Depending on the setting of the magnitude of the magnetic force of the magnets 62, 63, 65, the magnets 62, 63, It is also possible to provide a habit of restoring the attraction of the magnets 63 and 65 only by their attraction force (as a result, habit of positioning the disc holding rod 22 at a fixed position).

Therefore, the overload prevention device 60 has the following actions. The disk holding rod 22 is supported by the rod support 21 so as to be displaceable in the direction of the overload, and is positioned at a fixed position by the positioning force (magnetic force) given by the positioning means (magnets 62, 63, 65). Has become. However, when an overload exceeding the above-mentioned positioning force acts on the disk holding rod 22 due to the disk 1 being caught by the magnetic recording layer forming apparatus 10 or the like, the rod 22 is immediately displaced and deviates from the fixed position, and the overload is prevented. Dissolve promptly. Further, the positional deviation detectors 66 and 67 detect the occurrence of the deviation of the disc holding rod 22 from the fixed position,
Based on the detection results of the position shift detectors 66 and 67, the control device 68 causes the rod support 21 to avoid a safe position where the rod 22 is not overloaded, and as a result, the disk 1 is stored in the magnetic recording layer. The magnetic recording layer forming apparatus 1 for removing the cause of the occurrence of overload such as being caught in the forming apparatus 10
It is possible to avoid a decrease in operating rate of 0.

As described above, the disc holding rod 22
Since the overload acting on the rod can be immediately eliminated, the rod 2
There is no accidental damage to the disk 2 and the positioning accuracy of the disk 1 is not impaired. Further, it is possible to prevent the disk 1 from being unexpectedly damaged and impairing the quality of the disk 1.

The disc holding rod positioning means is not limited to a magnet but may be a spring or the like. Also,
The overload supported by the overload prevention device is not limited to one acting in the axial direction of the disc holding rod, but may be one acting in the radial direction of the disc holding rod.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, in the disk positioning portion provided in the holding groove of the disk holding rod, the both side wall surfaces for positioning the disk are not limited to the both side vertical surfaces, but are like the two side gently inclined surfaces 42A as shown in FIG. 6C. May be. The present invention can also be used in disk holding devices other than magnetic disks. Further, the disc holding rod may have only a single holding groove.

[0074]

As described above, according to the present invention, in the disc holding device, the disc diameter can be reduced and the disc processing can be speeded up with a very simple structure, and the disc contamination by fine powder can be prevented. In addition, the positioning accuracy of the disc can be improved.

Further, according to the present invention, it is possible to simultaneously hold a large number of disks in the disk holding device.

Further, according to the present invention, it is possible to hold a plurality of types of disks in the disk holding device without changing the setup, and it is possible to improve the operating rate of the disk processing device.

[Brief description of drawings]

FIG. 1 is a schematic view showing a magnetic recording layer forming apparatus.

FIG. 2 is a schematic view showing a disc holding device.

FIG. 3 is a schematic view showing a disc transfer state by a disc holding device.

FIG. 4 is a schematic diagram showing a first embodiment of a disk holding device.

FIG. 5 is a schematic diagram showing a disc holding state by the disc holding device.

FIG. 6 is a schematic view showing a second embodiment of the disk holding device.

FIG. 7 is a schematic view showing a third embodiment of the disk holding device.

FIG. 8 is a schematic view showing a fourth embodiment of the disk holding device.

FIG. 9 is a schematic view showing a fifth embodiment of the disk holding device.

FIG. 10 is a schematic diagram showing a disc shake damping state by the disc holding device.

FIG. 11 is a schematic view showing an embodiment of an overload prevention device.

[Explanation of symbols]

1 disk 1A circular hole 1B chamfered portion 20, 20A to 20E disk holding device 21 rod support 22, 22A to 22E disk holding rod 30, 31, 32, 33A to 33C, 34A to 34C,
35A, 35B holding groove 41 disc introduction taper portion 42 disc positioning portion 43 disc supporting arc portion 43A V groove portion

Claims (6)

[Claims] 1. A disk holding device capable of holding a disk by inserting a disk circular hole into the disk holding rod and engaging a circular groove inner peripheral portion of the disk into a holding groove provided on the rod. The holding groove has a disc introduction taper portion for guiding both sides of the circular hole of the disc, a disc positioning portion for guiding the disc introduced by the disc introduction taper portion and positioning the disc between both side wall surfaces, and disc positioning. A disk holding device, comprising: a disk supporting arc portion having the same curvature as the circular hole of the disk positioned by the portion and making surface contact with the circular hole. 2. A V-shaped groove having a cross-section orthogonal to the arc of the disc supporting arc portion of the holding groove of the disc holding rod at the same angle as the chamfering angle of the chamfered portion provided on both side edges of the circular hole of the disc. The disk holding device according to claim 1, which has a shape. 3. The disc holding rod is provided with a plurality of holding grooves having the same groove shape at a plurality of longitudinal positions of the rod, and the disc supporting arc portions of the holding grooves are arranged concentrically with each other. The disk holding device according to claim 1 or 2. 4. The disc holding rod is capable of holding a plurality of types of discs having different disc thicknesses, and a plurality of pairs of groove-shaped sets having different groove shapes are provided at a plurality of longitudinal positions of the rod, respectively. The disk holding device according to claim 1, further comprising a holding groove. 5. The disc holding rod is capable of holding a plurality of types of discs having different circular hole shapes,
The disc holding device according to any one of claims 1 to 3, wherein a plurality of holding grooves each having a groove shape different depending on the type of the disc are provided at each of a plurality of longitudinal positions of the rod. 6. The disc holding rod is capable of holding a plurality of types of discs having different disc thicknesses, and a plurality of holding grooves each having a different groove shape depending on the type of the disc are provided at the same position in the longitudinal direction of the rod. Claim 1 comprising
4. The disk holding device according to any one of 3 to 3.