WO2009128507A1

WO2009128507A1 - Method of storing optical recording medium disks and stacking table for storing thereon stack of optical recording medium disks

Info

Publication number: WO2009128507A1
Application number: PCT/JP2009/057664
Authority: WO
Inventors: 健栗和田
Original assignee: 三菱化学メディア株式会社
Priority date: 2008-04-17
Filing date: 2009-04-16
Publication date: 2009-10-22
Also published as: JP2009274766A

Abstract

A method of storing optical recording medium disks does not cause damage to the surfaces of the disks during storage and transportation thereof. A method of storing optical recording medium disks on a stacking table provided with a base table and a center projection shaft upstanding from the base table. The disks each have a hole penetrating between the front and rear sides thereof and allowing the center projection shaft to be inserted therethrough. The method uses a circular dummy disk having formed therein a hole and also having formed in the periphery of the hole a ring-like projection having a height of 0.20 mm or more. The hole in the dummy disk penetrates between the front and rear sides thereof and allows the center projection shaft to be inserted therethrough. To store the optical recording medium disks, the dummy disk and the optical recording medium disks are stacked in this order by inserting the center projection shaft through the holes in the dummy and recording medium disks.

Description

Optical recording medium disk storage method and optical recording medium disk superposition stacked storage superposition stand

The present invention relates to an optical recording medium disk storage method and an optical recording medium disk superimposed stacked storage stacking base.

There are various forms of shipping and transporting optical recording medium disks. In some cases, each optical recording medium disk is stored in a flat resin case, but when shipping and transporting a large number of optical recording medium disks, units of 10, 25, 50, 100, etc. May be stored in one case.
As such a storage method, generally, 25 or 50 disk-shaped optical recording medium disks are stacked and stored in a substantially cylindrical resin case called a spindle case.

FIG. 7 is a schematic exploded perspective view showing a state in which the optical recording medium disk is stored using a general-shaped spindle case. The spindle case 101 includes a superposition base 104 having a disk-like base base 102 and a central protruding shaft 103 formed at the center of the base base 102, and an optical recording medium disk 105 loaded on the superposition base 104. The cover 106 protects against dust and the like from the outside.
The optical recording medium disk 105 accommodated in the spindle case 101 is generally disk-shaped, and a hole 107 (hereinafter referred to as “disk center hole”) through which the center protruding shaft can be inserted through the front and back. Yes.)
When storing the optical recording medium disk 105 in the spindle case 101, the central protruding shaft 103 is inserted into the disk center hole 107 of the optical recording medium disk 105, and a desired number of optical recording medium disks 105 are stacked. Then, the cover 106 is mounted on the superimposing table 104.

At this time, if the flat optical recording medium disks 105 are simply stacked, the surface of the optical recording medium disk 105 may be damaged by contact with the adjacent optical recording medium disk. Therefore, the optical recording medium disc 105 is usually provided with a stack ring.

FIG. 8A shows a schematic top view of the optical recording medium disc 105 having a general shape, as viewed from the opposite side of the incident surface of the recording laser beam, taking a Blu-ray disc as an example. FIG. 8B is a schematic cross-sectional view of the optical recording medium disk 105 taken along line P8-Q8 in FIG. 8A.

The stack ring 108 is a circular continuous protrusion provided in the periphery of the disc center hole 107 of the optical recording medium disc 105. When the optical recording medium disc is a Blu-ray disc, the stack ring is generally formed only on the side opposite to the incident surface of the recording laser beam of the Blu-ray disc.

When the optical recording medium disks 105 are stacked and stored, by stacking a plurality of optical recording medium disks 105 so that the surface with and without the stack ring 108 is in contact, only the portion of the stack ring 108 is adjacent to the optical recording medium. It comes into contact with one surface of the disk 105. As a result, a space corresponding to the height of the stack ring 108 is generated between the optical recording medium disk 105 and the adjacent optical recording medium disk 105, and the optical recording medium disks 105 are located at places other than the stack ring 108 portion. Contact can be prevented. The shape of the stack ring 108 can be set as appropriate, but the height (H8 in FIG. 8B) is usually less than 0.2 mm.
Various methods have been proposed for storing the optical recording medium disc 105 using the stack ring 108 (see Patent Documents 1 and 2).

Further, when storing the optical recording medium disk 105 in the spindle case 101, the stacked optical recording medium disks 105 of the stacked optical recording medium disks 105 are prevented in order to prevent scratches and dust from being caused by contact between the optical recording medium disk 105 and the spindle case 101. Generally, a dummy disk 109 as shown in FIG. 7 (in FIG. 7, the dummy disk 109 is provided only at the bottom) is installed at the bottom and / or the top.

Although the dummy disk 109 is not an actual product, it has substantially the same shape as the optical recording medium disk 105 that is a product, and there is no problem even if a scratch occurs, and it can be used repeatedly. . Use of the dummy disk 109 enables safe shipping and transportation in terms of quality.

JP 2000-289972 A JP 2000-255672 A

However, even when the optical recording medium disk 105 is stored and transported in the spindle case 101 using the dummy disk 109, the surface of the optical recording medium disk 105 is deformed by an external force during transportation, etc. In some cases, scratches may occur.

A specific example will be described. First, when the optical recording medium disc 105 has the stack ring 108, the entire load of the stacked optical recording medium disc 105 is concentrated on the portion where the stack ring 108 contacts, so that the vicinity of the center of the superimposing table 104 sinks. There is a case. In particular, when the spindle case 101 is placed on a soft material such as corrugated cardboard, or when the spindle case 101 is stacked in two or more stages, this tendency increases.
9 is a schematic cross-sectional view of the spindle case 101 cut along the line P7-Q7 in FIG. 7 at this time (FIG. 9 omits the cover 106). Since a height difference (H9 in FIG. 9) is generated between the vicinity of the center of the superimposing table 104 and the outer edge portion, even if the dummy disk 109 is placed at the bottom and the optical recording medium disk 105 is loaded, the dummy disk 109 is loaded. There is a problem that the disk 109 and the optical recording medium disk 105 immediately above the disk 109 easily come into contact with each other at the outer peripheral portion, causing a scratch.

This problem tends to become more prominent when the optical recording medium disc 105 is a Blu-ray disc. On the incident surface side of the recording laser beam of the Blu-ray disc, a cover layer is formed on almost the entire surface according to the standard. When the Blu-ray disc is stored as illustrated in FIG. 7, the stack ring 108 of the dummy disc 109 is in contact with the recording laser light incident surface side of the optical recording medium disc 105 thereabove. Will be in contact with the layer. Since the cover layer is usually made of a relatively soft resin material, the stack ring 108 digs into the cover layer, and the space between the dummy disk 109 and the upper optical recording medium disk 105 tends to be narrowed. Therefore, the Blu-ray disc tends to come into contact with the dummy disc 109 at the outer peripheral portion of the optical recording medium disc 105 and to be easily damaged as compared with other types of optical recording medium discs.

The present invention has been made in view of the above circumstances, and provides a storage method in which the surface of an optical recording medium disk is not damaged during storage or transportation. Moreover, the superimposition stand which can perform such storage is provided.

In order to solve the above problems, the inventors of the present invention have provided that the lowermost dummy disk 109 of the stacked optical recording medium disks 105 includes a ring-shaped convex portion having a specific shape, so that the optical recording medium disk 105 is scratched. I found it difficult to stick.

Furthermore, it has been found that even when the base table 102 of the superimposing table 104 is provided with ribs in a specific manner, the optical recording medium disk 105 is hardly damaged, and the present invention has been completed.

In other words, the gist of the present invention is an optical recording in which a hole that can penetrate the front and back and insert the central protruding shaft is formed in a superposed base that includes a base base and a central protruding shaft that is erected on the base base. A method for storing a medium disk, wherein a disk-shaped dummy having a hole formed through the front and back and into which the central protruding shaft can be inserted and having a ring-shaped convex part having a height of 0.2 mm or more at the peripheral part of the hole. The optical recording medium disk is stored in a state in which the disk and the optical recording medium disk are stacked in this order with the central protruding shaft inserted into the hole and stacked on the base table of the superimposing table. Is the method.

At this time, it is preferable to store the dummy disk so that the maximum distance between the dummy disk and the base is 2 mm or more, with the central protruding shaft inserted into the hole of the dummy disk.

In addition, a spacer having a thickness of 1 mm or more, a dummy disk, and an optical recording medium disk formed with a hole through which the center protruding shaft can be inserted through the front and back surfaces, the central protruding shaft in each order. It is also preferable to store in a state where it is inserted into the hole and loaded.
In addition, it is preferable that the surface of the tip of the ring-shaped convex portion that comes into contact with the adjacent optical recording medium disk when storing the optical recording medium disk is flat.

Another gist of the present invention is an overlapping table on which an optical recording medium disc having a hole penetrating the front and back is stacked, the base table, and the hole of the optical recording medium disc standing on the base table. A central projecting shaft that can be inserted, and the base table has a portion in the vicinity of the central projecting shaft facing an outer peripheral portion of the optical recording medium disk when the optical recording medium disk is loaded on the superimposing table. It is an optical recording medium disc superposition stack storage superposition table characterized by being formed to be 2 mm or more higher than the portion.

At this time, it is preferable that ribs are radially formed on the base table from the central protruding shaft to the outer periphery of the base table.

When the optical recording medium disc storage method of the present invention is used, it is possible to suppress the occurrence of scratches on the surface of the optical recording medium disc during storage or transportation. Also, the optical recording medium disk superposition stack storage stack of the present invention can suppress the occurrence of scratches on the surface of the optical recording medium disk during storage and transportation.

FIG. 1 is a schematic exploded perspective view showing a first embodiment of an optical recording medium disk storage method according to the present invention. FIG. 2A is a schematic top view of the dummy disk 9 of the present invention as viewed from the surface having the ring-shaped convex portion 10. FIG. 2B is a schematic cross-sectional view of the dummy disk 9 of the present invention cut along the line P2-Q2 in FIG. FIG. 3 shows a method for storing an optical recording medium disk according to the present invention, and is a schematic cross-sectional view of the spindle case 1 cut along the line P1-Q1 in FIG. FIG. 4 is a schematic sectional view showing a second embodiment of the optical recording medium disk storage method of the present invention. FIG. 5A is a schematic top view of the optical recording medium disk superposition stack storage superposition table 40 according to the third embodiment of the present invention as seen from above. FIG. 5B is a schematic cross-sectional view of the optical recording medium disc superimposed stack storage stack 40 taken along line P5-Q5 in FIG. 5A. FIG. 6A is a schematic top view of the optical recording medium disk superposition stack storage superposition table 41 according to the fourth embodiment of the present invention as seen from above. FIG. 6B is a schematic cross-sectional view of the optical recording medium disc superposition stack storage stand 41 taken along line P6-Q6 in FIG. 6A. FIG. 7 is a schematic exploded perspective view showing a state in which the optical recording medium disk is stored using a general-shaped spindle case. FIG. 8A shows a schematic top view of the optical recording medium disc 105 having a general shape, as viewed from the opposite side of the incident surface of the recording laser beam, taking a DVD-R as an example. FIG. 8B is a schematic cross-sectional view of the optical recording medium disk 105 taken along line P8-Q8 in FIG. 8A. FIG. 9 shows a state in which the optical recording medium disk is stored using a general-shaped spindle case, and is a schematic cross-sectional view of the spindle case 101 taken along line P7-Q7 in FIG.

Hereinafter, embodiments of the present invention will be described in detail by taking the case of a Blu-ray disc as an optical recording medium disc as an example, but the present invention is not limited to the following embodiments and is within the scope of the gist thereof. Various modifications can be made.

[1. First Embodiment]
According to a first embodiment of the present invention, light in which a hole that can penetrate the front and back and insert a central protruding shaft is formed in a superimposing table that includes a base table and a central protruding shaft that is erected on the base table. The present invention relates to a method for storing a recording medium disk. In the present invention, storage refers to a state in which an optical recording medium disk is loaded on a superimposition table, and is not limited to simply leaving it in a warehouse or the like, but also includes transportation.

Specifically, in the first embodiment of the method for storing an optical recording medium disk of the present invention, a ring having a height of 0.2 mm or more is formed which is formed with a hole penetrating the front and back and capable of inserting the central protruding shaft. The disc-shaped dummy disc having the convex portion on the periphery of the hole and the optical recording medium disc are stored in a state where the central protruding shaft is inserted into the hole into which the central protruding shaft is inserted in this order and stacked. Is.
Hereinafter, a first embodiment will be described in detail with reference to the drawings.

FIG. 1 is a schematic exploded perspective view showing a first embodiment of an optical recording medium disk storage method according to the present invention.
In FIG. 1, a hole 7 (hereinafter referred to as “center hole”) through which a central protruding shaft 3 can be inserted through a superimposing table 4 including a base table 2 and a central protruding shaft 3 erected on the base table 2. The optical recording medium disc 5 on which the optical disc is formed is stored.

The optical recording medium disk 5 is formed with a stack ring 8, and when the optical recording medium disk 5 is loaded and stored on the superimposing table 4, the central protrusion 7 projects into the central hole 7 of the optical recording medium disk 5. The shaft 3 is inserted, and a desired number of optical recording medium disks 5 are stacked on the superimposing table 4.
At this time, a dummy disk 9 having a ring-shaped convex portion 10 is installed at the bottom of the stacked optical recording medium disks 5. The dummy disk 9 may be additionally stacked on the top of the stacked optical recording medium disks 5 as necessary (not shown).
Further, if necessary, a cover 6 may be provided for protecting the optical recording medium disk 5 loaded on the superimposing table 4 from external dust or the like. At this time, the base table 2 may be provided with a fitting portion 2 a that is fitted to the cover 6 and fixes the cover 6. Hereinafter, the superimposing table 4 and the cover 6 may be collectively referred to as a spindle case 1.

(Dummy disk)
FIG. 2A is a schematic top view of the dummy disk 9 according to the present invention as viewed from a surface having a ring-shaped convex portion 10 to be described later. FIG. 2B is a schematic cross-sectional view of the dummy disk 9 of the present invention cut along the line P2-Q2 in FIG.

The dummy disk 9 of the present invention has a disk shape, and is formed with a hole 7 (center hole) through which the center protruding shaft 3 of the superimposing table 4 can be inserted. When the dummy disk 9 is stored, the central hole 7 is passed through the central protruding shaft 3 and stacked.

Further, a ring-shaped convex portion 10 which is a circular protrusion is provided around the central hole 7 of the dummy disk 9 of the present invention. The ring-shaped convex portion 10 may be provided on both sides of the dummy disk 9 or may be provided on one side.
The ring-shaped convex portion 10 is not limited as long as the optical recording medium discs 5 can be stably stacked and stacked while avoiding contact between adjacent optical recording medium discs 5 with respect to optical recording. It is not limited to the shape of a continuous protrusion, For example, a shape like a regular polygon may be sufficient and an intermittent circle may be sufficient.

The height of the ring-shaped convex portion 10 (H2 in FIG. 2B) is preferably higher than the height of the stack ring 8 of the optical recording medium disk 5, and as described above, the stack ring of the optical recording medium disk 5 is used. Since the height of 8 is usually less than 0.2 mm, it is usually 0.2 mm or more, preferably 0.3 mm or more, more preferably 0.4 mm from the substrate surface on the side where the ring-shaped convex portion of the dummy disk 9 is provided. In addition, it is usually 2.0 mm or less, preferably 1.0 mm or less, more preferably 0.8 mm or less.
Below this range, the outer peripheral portion of the optical recording medium disk 5 tends to be easily damaged by sinking near the center of the superimposing table 4. Moreover, when it exceeds this range, it tends to be difficult to form with high accuracy.

Further, it is preferable that the surface of the tip of the ring-shaped convex portion 10 that comes into contact with the adjacent optical recording medium disk 5 or the like when storing the optical recording medium disk 5 is flat. This is because the load of the optical recording medium disk laminated stably can be supported.
The width of the flat surface of the tip of the ring-shaped convex portion 10 (W21 in FIGS. 2A and 2B) is usually 0.3 mm or more, preferably 0.5 mm or more, more preferably 0. 0.8 mm or more, and usually 9.0 mm or less, preferably 5.0 mm or less. Below this range, there is a possibility that the cover layer of the upper optical recording medium disc is likely to be embedded. Moreover, when it exceeds this range, there exists a possibility that shaping | molding will become difficult.
In addition, the width of the bottom of the ring-shaped convex portion 10 (W22 in FIGS. 2A and 2B) is preferably wider than the width of the tip in terms of strength. Moreover, it is 9.0 mm or less normally, Preferably it is 5.0 mm or less. If this range is exceeded, the ring-shaped convex portion 10 may come into contact with the data recording area of the upper optical recording medium disc.
Further, the ring-shaped convex portion 10 is preferably provided in a circular area having a radius of 16.5 mm from the center of the dummy disk 9. This is because if the protrusion protrudes outside this area, the ring-shaped convex portion 10 starts over the data recording area. The peripheral portion of the center hole 7 refers to a portion corresponding to a circular region having a radius of 16.5 mm from the center of the dummy disk 9.

FIG. 3 shows a method for storing the optical recording medium disk of the present invention, and is a schematic cross-sectional view of the spindle case 1 taken along the line P1-Q1 in FIG. 1 (however, the cover 6 is omitted). ).
A difference in height (H31 in FIG. 3) may occur between the vicinity of the center of the superimposing table 4 and the outer edge portion by sinking near the center of the superimposing table 4 due to the load of the optical recording medium disk 5. However, even in this case, since the dummy disk 9 having the ring-shaped convex portion 10 having a sufficient height is attached to the bottom of the optical recording medium disk 5 to be loaded, the dummy disk 9 and the optical recording medium immediately above the dummy disk 9 are attached. Contact with the outer periphery of the disk 5 is suppressed.
Therefore, by using the dummy disk 9 having the ring-shaped convex portion 10 having the above-described shape, the contact between the dummy disk 9 being transported and the optical recording medium disk 5 in the vicinity can be suppressed, and scratches can be prevented during transportation. An optical recording medium disk storage method that can suppress generation can be realized.

Further, the dummy disk 9 may be stacked upside down from the direction shown in FIG.
Even in this case, it is possible to suppress the contact between the dummy disk 9 being transported and the adjacent optical recording medium disk 5, and to realize a storage method of the optical recording medium disk capable of suppressing the generation of scratches during transport. .
In this case, a protection ring (not shown in FIG. 3) is provided on the surface opposite to the installation surface of the stack ring 8 of the optical recording medium disk 5, or the ring-shaped convex portions 10 are provided on both surfaces of the dummy disk 9. Preferably (not shown in FIG. 3). This is because the contact between the portion of the optical recording medium disk 5 loaded at the bottom and the dummy disk 9 can be reduced. However, when the ring-shaped convex portions 10 are provided on both surfaces of the dummy disk 9, the ring-shaped convex portions 10 that are in contact with the optical recording medium disk 5 are not necessarily required to be the same height on both surfaces. It is sufficient that the height of the medium disk 5 exceeds the stack ring 8.

The diameter of the dummy disk 9 of the present invention is generally the same as that of the optical recording medium disk 5, but may be larger than the optical recording medium disk 5 as long as the dimensions of the spindle case or the like allow.

In the optical recording medium disk storage method of the present invention, the maximum distance between the dummy disk 9 and the base 2 (H32 in FIG. 3) is usually 1.0 mm or more, preferably 2.0 mm or more. It is preferable because the generation of scratches can be further suppressed.
Here, the “maximum distance between the dummy disk 9 and the base table 2” is the value of the distance between the base table 2 and an arbitrary point included in the surface of the dummy disk 9 facing the base table 2. Means the one that maximizes.

Further, in the optical recording medium disk storage method of the present invention, two or more dummy disks 9 may be used in an overlapping manner. As the number increases, it becomes possible to suppress the occurrence of scratches on the optical recording medium disk.

Note that the dummy disk 9 of the present invention only needs to suppress the occurrence of scratches on the surface of the optical recording medium disk 5, and therefore does not have a configuration used for optical recording such as a recording layer and a reflective layer. Good. This can reduce the cost.
Further, since it is only necessary to prevent the surface of the optical recording medium disk 5 from being scratched, the dummy disk 9 of the present invention may have a recording layer or the like as long as it has only the ring-shaped convex portion 10 described above. .
The height of the ring-shaped convex portion 10 of the dummy disk 9 is, as described above, from the surface of the substrate on the side where the ring-shaped convex portion of the dummy disk 9 is provided, as represented by H2 in FIG. Even if the dummy disk 9 has a recording layer or the like, it is not the height from the outermost surface of these layers. However, when the dummy disk 9 has a recording layer or the like, the height from the outermost surface is more preferably 0.2 mm or more.

(Dummy disk manufacturing method)
The dummy disk 9 of the present invention can be manufactured by any known method. For example, the shape of the ring-shaped convex part of the mold mirror surface of a mold for producing a normal CD substrate can be processed into a desired shape, and can be manufactured by injection molding using polycarbonate as a material using a mirror surface stamper.
As for the material of the dummy disk 9, any known material other than polycarbonate can be used as long as it is a material that can be easily injection-molded. The material of the dummy disk 9 is preferably the same as or softer than the optical recording medium disk 5.

(Superimposition stand)
The superimposing table 4 in the first embodiment of the present invention is not limited as long as it includes the base table 2 and the central projecting shaft 3 erected on the base table 2, and any known superimposing table can be used. Can be used. For example, you may provide the fitting part 2a fitted with the above-mentioned cover 6, and material, a color, a design, etc. are arbitrary unless the effect of this invention is impaired remarkably.
However, the base 2 preferably has a wider upper surface than the optical recording medium disk 5 from the viewpoint of stacking the optical recording medium disks 5 in a superimposed manner. Further, it is preferable that the central projecting shaft 3 is erected vertically upward with respect to the base table 2. This is because the optical recording medium disk 5 can be stably loaded.

(Optical recording medium)
The optical recording disk 5 according to the first embodiment of the present invention is not limited as long as it has a hole (center hole) 7 through which the center protruding shaft can be inserted so as to penetrate the front and back sides. A recording medium disk can also be used.

However, in order to prevent scratches when the optical recording disks 5 are stacked and stacked, it is preferable to have a stack ring 8 that is a circular continuous protrusion on the periphery of the center hole 7.

(cover)
In the present invention, the superimposing table may include a cover 6 for protecting the optical recording medium disk 5 loaded on the superimposing table 4 from dust or the like from the outside, if necessary. The cover 6 may include a structure that fits with the superimposing table 4, and materials, colors, designs, and the like are arbitrary as long as the effects of the present invention are not significantly impaired.

[2. Second Embodiment]
A second embodiment of the method for storing an optical recording medium disk of the present invention is a spacer having a thickness of 1 mm or more, a dummy disk, The recording medium disc is stored in this order in a state where the central projecting shaft is inserted into each center hole and stacked.
In other words, the second embodiment of the present invention is an embodiment in which a spacer 11 is further provided below the dummy disk 9 in the first embodiment of the present invention.
Hereinafter, the second embodiment will be described.

FIG. 4 is a schematic sectional view showing a second embodiment of the optical recording medium disk storage method of the present invention. FIG. 4 shows a mode in which a spacer 11, which will be described later, a dummy disk 9, and an optical recording medium disk 5 are stacked and stored in this order on the superimposing table 4. FIG. 4 is a cross-sectional view in a vertical plane including the central protruding shaft 3 of the superimposing table 4.
Since the configuration other than the spacer 11 is the same as that of the first embodiment of the present invention, the spacer 11 will be described.

(Spacer)
The spacer 11 is a member having a thickness of 1 mm or more in which a hole (center hole) that penetrates the front and back and can be inserted with the central protruding shaft is formed.
The spacer 11 widens the space between the superimposing table 4 and the dummy disk 9, and can prevent scratches on the outer periphery of the optical recording medium disk 5 as exemplified in FIG.
The spacer 11 is not limited as long as it has the above-described characteristics, and the shape, material, color, design and the like are arbitrary as long as the effects of the present invention are not significantly impaired. However, it is preferable to have the following configuration. This is because the optical recording medium disk can be laminated stably.

The spacer 11 preferably has a uniform thickness. This is because the optical recording medium disk can be laminated stably. The thickness of the spacer 11 is usually 1.0 mm or more, preferably 1.2 mm or more, more preferably 1.4 mm or more, and usually 2.0 mm or less, preferably 1.5 mm or less. Below this range, the dummy disk 9 and the superimposing table 4 may come into contact with each other. On the other hand, if it exceeds this range, the number of optical recording medium disks that can be stored tends to decrease.

The planar shape of the spacer 11 is not limited, but when the spacer 11 and the dummy disk 9 are in contact with each other, the position directly behind the position where the ring-shaped convex portion 10 of the dummy disk 9 is formed (in FIG. The shape which can be contact | abutted at least (position right under the convex part 10) is preferable. As a result, the ring-shaped convex portion 10 can be appropriately supported, so that the optical recording medium disc can be stably stacked and stacked. The spacer 11 may be slightly roughened by embossing or the like in order to suppress slippage with the dummy disk 9.

FIG. 4 shows a state in which the optical recording medium disk of the present invention is stored according to the second embodiment.
Even if there is a difference in height (H41 in FIG. 4) between the vicinity of the center of the superimposing table 4 and the outer edge due to the sinking of the vicinity of the center of the superimposing table 4 due to the weight of the optical recording medium disk, Since the spacer 11 is installed between the disk 2 and the dummy disk 9, contact between the dummy disk 9 and the optical recording medium disk 5 immediately above the dummy disk 9 is suppressed.
Therefore, by using the spacer 11, it is possible to suppress contact between the dummy disk 9 being transported and the adjacent optical recording medium disk 5, and a method for storing the optical recording medium disk capable of suppressing the generation of scratches during transport. realizable.

Further, the dummy disk 9 may be stacked upside down from the direction shown in FIG.
Even in this case, it is possible to suppress the contact between the dummy disk 9 being transported and the adjacent optical recording medium disk 5, and to realize a storage method of the optical recording medium disk capable of suppressing the generation of scratches during transport. .
In this case, the optical recording medium disk 5 is provided with a protection ring (not shown in FIG. 4) on the surface opposite to the installation surface of the stack ring 8, or the dummy disk 9 is provided with ring-shaped convex portions 10 on both surfaces. It is preferred (not shown in FIG. 4). This is because the contact between the portion of the optical recording medium disk 5 loaded at the bottom and the dummy disk 9 can be reduced. However, when the ring-shaped convex portions 10 are provided on both surfaces of the dummy disk 9, the ring-shaped convex portions 10 that are in contact with the optical recording medium disk 5 are not necessarily required to be the same height on both surfaces. It is sufficient that the height of the medium disk 5 exceeds the stack ring 8.

Also in the second embodiment of the present invention, it is preferable that the maximum distance (H42 in FIG. 4) between the dummy disk 9 and the base 2 is 2.0 mm or more. This is because the occurrence of scratches on the outer peripheral portion of the optical recording medium disc as exemplified in FIG. 9 is suppressed.

(Spacer manufacturing method)
The spacer 11 of the present invention can be manufactured by any known method. For example, it can be manufactured by injection molding, or may be manufactured by punching from a plate material having a desired thickness.
As the material of the spacer 11 of the present invention, plastic is preferable, and polyethylene that generates less dust is particularly preferable because of good sliding.

[3. Third Embodiment]
The third embodiment of the present invention relates to a superposition table on which an optical recording medium disk on which holes penetrating the front and back sides are stacked. Specifically, it comprises a base stand and a central protruding shaft that can be inserted into a hole of an optical recording medium disk that is erected on the base stand. The optical recording medium disc superposition stack storage stack is formed by 2 mm or more higher than the portion facing the outer peripheral portion of the optical recording medium disc when the optical recording medium disc is loaded on the optical disc.

A third embodiment of the present invention is to store an optical recording medium disk using the above-mentioned optical recording medium disk overlapping stacked storage stacking base. Specifically, in place of the known spindle case superimposing base, the optical recording medium disk superposing / stacking superposing base of the present invention may be used, or the first embodiment of the present invention or the present invention. In the second embodiment, instead of the superimposing table 4, the optical recording medium disk superimposing / stacking superimposing table of the third embodiment may be used. In particular, it is preferable to use in combination with the first embodiment of the present invention or the second embodiment of the present invention because the effect is remarkably obtained.

(Optical recording medium disc superposition stacking superposition stand of the third embodiment)
FIG. 5A is a schematic top view of the optical recording medium disk superposition stack storage superposition table 40 according to the third embodiment of the present invention as seen from above. FIG. 5B is a schematic cross-sectional view of the optical recording medium disc superimposed stack storage stack 40 taken along line P5-Q5 in FIG. 5A.

As shown in FIGS. 5A and 5B, the optical recording medium disk superposition / laminar storage superposition base 40 includes a base base 20 and a central protruding shaft 30 erected on the base base 20. The central protruding shaft 30 can be inserted into the central hole of the optical recording medium disc. At this time, the central protruding shaft 30 is preferably erected vertically upward with respect to the base table 20. This is because the optical recording medium disk can be stably loaded.

In addition, the base 20 is located in the vicinity of the central projecting shaft 30 (that is, when the optical recording medium disk is stacked on the optical recording medium disk superposition stack storage stack 40, on the inner periphery of the optical recording medium disk). The portion 20b facing and in contact with the inner peripheral portion is formed to be 2 mm or more higher than the portion 20c facing the outer peripheral portion of the optical recording medium disc when the optical recording medium disc is stacked on the superimposing table 40. (The height corresponding to H5 in FIG. 5).

Also, the optical recording medium disc superposition stack storage superposition table 40 may be formed with a fitting portion 20a for fitting a cover (not shown in FIGS. 5A and 5B). By attaching the cover, the optical recording medium disk can be protected from dust and the like. Furthermore, the cover can be fixed to the optical recording medium disk superposition stack storage superposition table 40 by being locked to the fitting portion 20a.

The difference in height between the proximity portion 20b of the central projecting shaft and the portion 20c facing the outer peripheral portion of the optical recording medium disk when the optical recording medium disk is loaded on the superimposing table 40 (the height corresponding to H5 in FIG. 5). Is usually higher than 2.0 mm, preferably higher than 2.5 mm.

In addition, when the area of the proximity portion 20b of the central protruding shaft in the base table 20 is formed to be 2 mm or more higher than the portion 20c facing the outer peripheral portion of the optical recording medium disc, the dummy disk 9, the spacer 11, etc. Any size that can be supported is acceptable.
Specifically, the radius from the center of the central protruding shaft 30 (corresponding to W5 in FIG. 5A) is usually 11.5 mm or more, preferably 12.0 mm or more, more preferably 12.5 mm or more, Usually, it is 16.5 mm or less, preferably 16.0 mm or less, more preferably 15.5 mm or less. Below this range, the contact area with the optical recording medium disk or the dummy disk may be too small and the disks may tilt. Further, if the range is exceeded, there is a possibility that when an optical recording disk is loaded, it contacts a data recording area of the optical recording medium disk.

In FIGS. 5 (a) and 5 (b), the proximity portion 20b of the central projecting shaft is high in a circular shape, but it can support an optical recording medium disk, a dummy disk, a spacer, or the like. If it is, it is not limited to this shape. For example, a regular polygonal shape, a donut shape, or a fan shape may be used.

By applying the above-described optical recording medium disc superposition stack storage superposition table 40 to the optical recording medium disc storage method of the present invention (that is, the first embodiment of the present invention and the second embodiment of the present invention). In the embodiment, the maximum distance between the dummy disk 9 and the base 20 (H23 in FIG. 3, H42 in FIG. 3, H42 in FIG. 4) Can be set to 2 mm or more.
As a result, even if the proximity portion 20b of the central projecting shaft of the optical recording medium disc superposition stack storage stack 40 sinks due to the load of the optical recording medium disc 5, the dummy disc 9 and the optical recording medium disc 5 immediately above the dummy disc 9 are placed. The contact in the outer peripheral part is suppressed. Therefore, it is possible to suppress the occurrence of scratches on the outer peripheral portion of the optical recording medium disk as exemplified in FIG.

Further, such an effect can be obtained even when the superposition table for optical recording medium disk superposition and storage of the present invention is used instead of the superposition stand 104 in the known spindle case 101 (see FIG. 7). In other words, even if a dummy disk is not used or an optical recording medium disk is stored using a known dummy disk, the optical recording medium disk or the outer peripheral portion of the dummy disk, and the optical recording medium disk overlap lamination It is possible to suppress contact with the storage platform. As a result, scratches on the outer periphery of the optical recording medium disc can be suppressed.

[4. Fourth Embodiment]
The fourth embodiment of the present invention is the same as the optical recording medium disk superposition stack storage superposition table 40 used in the third embodiment of the present invention. That is, the optical recording medium disk 5 is stored by using the optical recording medium disk stacking and stacking storage table 41 in which ribs are radially formed on the part. Specifically, in the first embodiment of the present invention or the second embodiment of the present invention, the optical recording medium disk superposition stacked storage superposition table of the fourth embodiment instead of the superposition stand 4 41 is used.

(Optical recording medium disc superposition stack storage superposition stand of the fourth embodiment)
FIG. 6A is a schematic top view of the optical recording medium disk superposition stack storage superposition table 41 according to the fourth embodiment of the present invention as seen from above. FIG. 6B is a schematic cross-sectional view of the optical recording medium disc superposition stack storage stand 41 taken along line P6-Q6 in FIG. 6A.

As shown in FIG. 6A and FIG. 6B, the optical recording medium disc superposition stack storage superposition base 41 is provided in the base base 21 and the hole of the optical recording medium disc erected on the base base 21. And a central protruding shaft 31 that can be inserted. In addition, the base 21 is located in the vicinity of the central projecting shaft 31 (that is, when the optical recording medium disk is stacked on the optical recording medium disk superimposing / stacking stack 41, on the inner periphery of the optical recording medium disk). The portion 21b facing and in contact with the inner peripheral portion is formed to be 2 mm or more higher than the portion 21c facing the outer peripheral portion of the optical recording medium disc when the optical recording medium disc is stacked on the superimposing table 41. (It is a height corresponding to H61 in FIG. 6).

Also, the optical recording medium disk superposition stack storage superposition table 41 may be formed with a fitting portion 21a for fitting a cover (not shown in FIGS. 6A and 6B). By attaching the cover, the optical recording medium disk can be protected from dust and the like. Further, the cover is locked to the fitting portion 21a, so that the cover can be fixed to the optical recording medium disk superposition stack storage superposition table 41.

The superposition base 41 for the optical recording medium disk superposition / laminar storage of the fourth embodiment of the present invention has a rib compared to the superposition table 40 for the optical recording medium disc superposition / laminar storage of the third embodiment of the invention. The difference is that 21d is formed. Hereinafter, the rib 21d will be described.

The ribs 21d are radially formed on the base table 21 from the central protruding shaft 31 to the outer periphery of the base table. By the ribs 21d, the entire optical recording medium disk to be laminated is concentrated on the central portion of the base table 21 (that is, the proximity of the central protruding shaft 31) 21b. The sinking around the center of 41 can be suppressed.
This can prevent scratches on the outer periphery of the optical recording medium disk as exemplified in FIG.

The height of the rib 21d (H62 in FIG. 6B) is usually 0.5 mm or more, preferably 0.75 mm or more, more preferably 0.9 mm or more, and usually 1.0 mm or less.
Below this range, it tends to be difficult to suppress subsidence near the center of the superimposing table 41. Further, if it exceeds this range, when the vicinity of the center of the superimposing table 41 sinks, the rib 21d and the dummy disk are likely to come into contact with each other, and as a result, the outer periphery of the optical recording medium disk tends to be damaged. is there. Usually, the rib 21d is preferably not in contact with the optical recording medium disk in order to avoid damage to the optical recording medium disk. Therefore, it is preferable that the height of the rib 21d (H62 in FIG. 6) is lower than the height (H61 in FIG. 6) of the proximity portion of the central protruding shaft 31.

The width of the rib 21d (W6 in FIG. 6A) is usually 1.0 mm or more, preferably 1.2 mm or more, and usually 1.5 mm or less, preferably 1.4 mm or less.
Below this range, it tends to be difficult to suppress subsidence near the center of the superimposing table 41. Moreover, when it exceeds this range, there exists a tendency for a shaping | molding precision to fall.

The ribs 21d are preferably provided at equal angular intervals in order to average and disperse the load. For example, it can be provided at 90 ° intervals, 60 ° intervals, 45 ° intervals, 30 ° intervals, etc., but it is preferably provided at 45 ° intervals as shown in FIG. This is because of the balance between molding accuracy and strength.

In addition, about the rib 20d, you may provide in both surfaces of the lower surface and upper surface of a superimposition stand, and may provide in any one side. However, in order to adapt to the shape of the case base of the machine that wraps with the existing heat shrinkable film, a rib is provided only on the upper surface of the superimposing base, and no rib is provided on the lower surface in the same manner as the superposing base of the known spindle case Is preferred.

[5. Others]
Although the optical recording medium disk storage method of the present invention and the optical recording medium disk superposition stack storage stack of the present invention have been described above, the present invention is not limited to the optical recording medium described above. Any modifications can be made without departing from the scope of the invention. Also, the first to fourth embodiments of the present invention may be implemented in any combination. For example, not only a Blu-ray disc but also an optical recording medium disc such as a CD and a DVD may be used.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples without departing from the gist thereof.

[Example 1]
Using a commercially available spindle case for 50 sheets (the diameter of the overlapping base is 142 mm, the height of the central protruding shaft is 84 mm, the diameter is 14.7 mm, the cover diameter is 126 mm, and the height is 90 mm). Scratches due to storage of the disk were confirmed.
A dummy disk having a ring-shaped convex portion (height 0.27 mm, tip width 1.0 mm) is stacked on the spindle case superimposition base, and Blu-ray Disc (registered trademark) 50 is used as an optical recording medium disk thereon. The sheets were laminated and covered. At this time, the maximum distance between the dummy disk and the base was 1.5 mm.
Five similar samples were wound and stored in a constant temperature bath at 60 ° C. for 3 hours. Thus, by storing the sample at a high temperature for a long time, the deformation of the superimposing table is promoted, and the dummy disk and the superimposing table are easily brought into contact with each other. Thereafter, the presence or absence of scratches (crimp marks) on the surface of the optical recording medium disc after storage was confirmed.
When the samples were collected, of the five samples, 0 samples were damaged on the outer periphery of the optical recording medium disk.

[Example 2]
The scratches due to storage of the optical recording medium disc were confirmed in the same manner as in Example 1 except that the ring-shaped convex portion of the dummy disc had a height of 0.30 mm and a tip width of 0.3 mm. At this time, the maximum distance between the dummy disk and the base table was 1.5 mm.
Among the five samples, two samples had scratches on the outer periphery of the optical recording medium disk.

[Example 3]
The scratches due to storage of the optical recording medium disc were confirmed in the same manner as in Example 1 except that the ring-shaped convex portion of the dummy disc had a height of 0.40 mm and a tip width of 1.0 mm. At this time, the maximum distance between the dummy disk and the base table was 1.5 mm.
Of the five samples, there were zero samples with scratches on the outer periphery of the optical recording medium disk.

[Example 4]
A spacer (thickness: 1.2 mm) is loaded on the spindle case superimposing stage, and a dummy disk having a ring-shaped convex part (height: 0.40 mm, tip width: 1.0 mm) is loaded thereon, on which Except for stacking 50 optical recording medium disks, scratches were confirmed by storing the optical recording medium disks in the same manner as in Example 1. At this time, the maximum distance between the dummy disk and the base table was 2.7 mm.
Of the five samples, there were zero samples with scratches on the outer periphery of the optical recording medium disk.

[Comparative Example 1]
Confirmation of scratches due to storage of the optical recording medium disc in the same manner as in Example 1 except that the ring-shaped convex portion of the dummy disc has a height of 0.17 mm and the tip has a chevron-like chevron shape. Was done. At this time, the maximum distance between the dummy disk and the base table was 1.5 mm.
Among the five samples, five samples had scratches on the outer periphery of the optical recording medium disk.

The present invention relates to an optical recording medium disk storage method and an optical recording medium disk superposition stack storage stack used for storing optical recording medium disks. According to the present invention, it is possible to suppress the occurrence of scratches on the surface of the optical recording medium disk during storage and transportation, and it can be used favorably for storing the optical recording medium disk.
In addition, the optical recording medium disc superposition stack storage stack of the present invention can also suppress the occurrence of scratches on the surface of the optical recording medium disc during storage and transportation. Can be used satisfactorily.
The entire contents of the specification, claims, drawings and abstract of Japanese Patent Application No. 2008-107573 filed on Apr. 17, 2008 are cited here as disclosure of the specification of the present invention. Incorporated.

DESCRIPTION OF SYMBOLS 1 Spindle case 2 Base stand 2a Fitting part 3 Center protrusion shaft 4 Superimposition stand 5 Optical recording medium disk 6 Cover 7 Center hole 8 Stack ring 9 Dummy disk 10 Ring-shaped convex part 11 Spacer 20 Base stand 20a Fitting part 20b Center protrusion Proximal portion 20c of the shaft 30 A portion facing the outer peripheral portion of the optical recording medium disc when the optical recording medium disc is stacked on the superimposing stage 30 Center protruding shaft 40 For optical recording medium disc superposition lamination storage of the third embodiment Superimposing base 21 Base base

21a Fitting portion

21b Proximity portion 21c of central projecting shaft 31 21c Opposite to the outer peripheral portion of the optical recording medium disc when the optical recording medium disc is stacked on the superimposing base 21d Rib 31 Central projecting shaft 41 4 embodiment of optical recording medium disc superposition For layer storage superimposed table 101 spindle case 102 baseplate 103 central protrusion shaft 104 superimposed table 105 optical recording medium disc 106 covers 107 center hole 108 stack ring 109 dummy disc

Claims

A method of storing an optical recording medium disk in which a hole that can be inserted through the front and back surfaces and into which a central projecting shaft is inserted is formed in a superimposing table that includes a base table and a central projecting shaft that is erected on the base table. ,
A disc-shaped dummy disc having a hole that penetrates the front and back and into which the central protruding shaft can be inserted, and has a ring-shaped convex portion with a height of 0.2 mm or more at the periphery of the hole; and the optical recording medium disc Are stored in a state in which the central projecting shaft is inserted into the hole in this order and stacked on the base table of the superimposing table.
2. The apparatus according to claim 1, wherein the dummy disk and the base table are stored in a state where the central projecting shaft is inserted and stacked so that a maximum distance between the dummy disk and the base is 2 mm or more. A storage method of the optical recording medium disk as described.
A spacer having a thickness of 1 mm or more formed with a hole through which the center protruding shaft can be inserted, the dummy disk, and the optical recording medium disk are arranged in this order. 3. The optical recording medium disk storage method according to claim 1, wherein the optical recording medium disk is stored in a state of being inserted and stacked.
The surface of the tip of the ring-shaped convex portion that comes into contact with an adjacent optical recording medium disc when the optical recording medium disc is stored is flat. 4. A method for storing an optical recording medium disk according to item 3.
A superimposing stage for loading an optical recording medium disc in which a hole penetrating the front and back is formed,
A base stand, and a central projecting shaft that can be inserted into a hole of the optical recording medium disk standing on the base stand,
The base table is formed such that the vicinity of the central projecting shaft is 2 mm or more higher than the part facing the outer peripheral portion of the optical recording medium disk when the optical recording medium disk is loaded on the superimposing table. An optical recording medium disc superposition stack storage superposition stand characterized by the above-mentioned.
6. The superposition base for optical recording medium disk superposition lamination storage according to claim 5, wherein ribs are radially formed on the base stand from the central projecting shaft to the outer periphery of the base stand.