JP2005034923A - Rotary table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary table used in an ultraviolet ray (UV) irradiation process for setting an UV setting resin used for sticking two disk plates, which rotary table can be used by being changed for two kinds of disks having different diameters without lowering the production efficiency and further without insufficiently setting the UV setting resin around the periphery of the disks. <P>SOLUTION: In the rotary table (10) used for setting the UV setting resin sandwiched between the two disk plates by the UV irradiation process, mounting portions (14a) for a 12 cm disk are arranged on the rotary table in the peripheral direction at a constant interval, and further, mounting portions (14b) for a 8 cm disk are arranged between the mounting portions for the 12 cm disk in the peripheral direction at a constant interval. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
In the manufacturing process of an optical disk such as a DVD (digital video disk) having a two-layer structure formed by bonding two disk plates, the present invention applies ultraviolet (UV) irradiation to an adhesive that bonds the two disk plates. The present invention relates to a rotary table (ultraviolet irradiation table) on which an optical disk is placed when being cured by the above.
[0002]
[Prior art]
In the production process of a DVD having a two-layer structure, an ultraviolet curable resin (hereinafter abbreviated as UV resin) that is an adhesive between two disc plates is bonded, and the UV resin is irradiated with ultraviolet rays. There is an ultraviolet irradiation step to cure by. In the ultraviolet irradiation process, a rotary table on which a DVD is placed is known as shown in FIG. 4 (see Patent Document 1 below).
[0003]
The turntable 100 is a disk that rotates around a central axis, and a DVD mounting unit 102 that mounts a DVD 122 on which two disc plates coated with an adhesive are bonded by a bonding device (not shown). A plurality are provided at equal intervals in the circumferential direction. One place in the circumferential direction is a loading place 104 where the DVD 122 is loaded by a transfer apparatus (not shown), and the other place is a carry-out place 106 where the DVD 122 is carried out by a transfer apparatus (not shown). . An ultraviolet irradiation unit 108 is provided between the loading point 104 and the unloading point 106, and the DVD 122 placed on the DVD mounting unit 102 is irradiated with ultraviolet rays by the ultraviolet irradiation unit 108 to cure the UV resin. It was.
[0004]
Further, as shown in FIG. 5, in order to promote the curing of the UV resin in the ultraviolet irradiation process, the DVD mounting unit 102 includes a concave mirror 112 in the vicinity of the periphery and a plane mirror 114 in the area other than the periphery. (See Patent Document 2).
[0005]
When the DVD 122 placed on the DVD placement unit 102 having such a mirror surface is irradiated by the ultraviolet lamp 120 directly above, the ultraviolet UV is reflected directly above by the plane mirror 114 and irradiated again by the DVD 122, and the concave mirror The ultraviolet rays UV reflected by the light 112 are collected near the periphery of the DVD 122. Thus, since the DVD 122 receives ultraviolet UV irradiation not only from the top but also from the bottom and the periphery, the UV resin hardens quickly, and the UV resin 124 that protrudes from the periphery also hardens firmly, and the two discs. The plates 122a and 122b are securely bonded, and the peripheral edge surface of the DVD 122 is protected.
[0006]
[Patent Document 1] JP-A-9-326140 [Patent Document 2] JP-A 2000-268416
[Problems to be solved by the invention]
Currently, DVDs with a diameter of 12 cm are the mainstream, but DVDs with a diameter of 8 cm are considerably produced for games.
[0008]
In the DVD manufacturing process, there is an ultraviolet irradiation process for curing the UV resin that bonds the two disk plates. However, preparing two types of rotary tables for a 12 cm DVD and an 8 cm DVD, It is uneconomical.
[0009]
Therefore, conventionally, an ultraviolet irradiation process is sometimes performed on an 8-cm DVD by using a rotary table for a 12-cm DVD. However, in this case, since the concave mirror 112 of the DVD mounting unit 102 is formed so as to reflect ultraviolet rays UV near the periphery of the 12 cm DVD 122, for the DVD 122 of 8 cm, there is no ultraviolet light near the periphery. There was a problem that UV could not be reflected well, the UV resin at the periphery of the DVD 122 was hardened, and the adhesion was likely to be incomplete.
[0010]
In addition, the jig was exchanged every time the production of the one having a diameter of 12 cm and the one having a diameter of 8 cm was switched. In this case, although insufficient curing of the UV resin at the periphery of the DVD 122 is eliminated, it is necessary to stop the apparatus for exchanging the jig, and it takes time to center the DVD mounting portion 102, and the production efficiency deteriorates. There was a problem.
[0011]
The present invention has been made in view of the above problems, and a rotary table used in an ultraviolet irradiation process for curing a UV resin for adhering two disc plates has a plurality of types having different diameters such as 12 cm and 8 cm. In this case, it is an object to prevent the UV resin from being sufficiently cured at the periphery of the disk without lowering the production efficiency.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in a circular turntable used when an article placement section for placing an article is arranged along the circumferential direction and various treatments are performed on the article, a predetermined size is provided. Alternatively, the article placement portions for placing the shaped articles are provided at equal intervals along the circumferential direction of the table, and the size different from the article between the article placement portions at equal intervals in the circumferential direction. Alternatively, an article placement section for placing an article having a shape is provided.
[0013]
(Operation) By switching the article placement section to be placed first at the loading place to the article placement section for placing any of the plurality of types of articles, various types of articles can be handled. Processing can be performed easily.
[0014]
In the invention which concerns on Claim 2, in the rotary table used when hardening the ultraviolet curable resin apply | coated to the disk by ultraviolet irradiation, the disk mounting part which mounts the disk of a predetermined diameter in the circumferential direction of the said rotary table. And a disc placement portion for placing a disc having a diameter different from that of the disc is provided between the disc placement portions at equal intervals in the circumferential direction.
[0015]
(Effect) By switching the disk mounting portion first positioned at the loading position to one of the large and small types of disk mounting portions, the peripheral UV resin can be used regardless of whether the disk is large or small. Ultraviolet irradiation can be performed so that curing does not become insufficient.
[0016]
In the invention according to claim 3, in the rotary table used when manufacturing a disk by curing an ultraviolet curable resin sandwiched between two disk plates by ultraviolet irradiation, a disk mounting on which a 12 cm disk is mounted. Are provided at equal intervals along the circumferential direction of the rotary table, and a disc placement portion for placing an 8 cm disc is provided between the disc placement portions at equal intervals in the circumferential direction. And
[0017]
(Operation) By switching the disk mounting portion first positioned at the loading position to a disk mounting portion for a 12 cm disk or a disk mounting portion for an 8 cm disk, both the 12 cm disk and the 8 cm disk can be handled. UV irradiation can be carried out so that the UV resin at the periphery does not become insufficiently cured.
[0018]
The invention according to claim 4 is characterized in that, in the invention according to claim 2 or 3, the disk mounting portion has a transparent glass attached to an opening provided in the rotary table.
[0019]
(Operation) Since the disk placed on the transparent glass can be irradiated with ultraviolet rays not only from above but also from below, thermal deformation is unlikely to occur.
[0020]
In the invention according to claim 5, in the invention according to claim 4, the periphery of the transparent glass is provided with a reflecting mirror part that reflects ultraviolet rays to the vicinity of the periphery of the disk placed on the disk placement part. Features.
[0021]
(Operation) Since the ultraviolet ray is reflected near the periphery of the disk by the reflecting mirror portion, the UV resin near the periphery of the disk is surely cured.
[0022]
The invention according to claim 6 is characterized in that, in the invention according to claim 5, the reflecting mirror part comprises a conical surface forming an angle of 45 ° with the transparent glass.
[0023]
(Operation) When the disk is irradiated with ultraviolet rays, the entire UV resin that protrudes from the peripheral edge of the disk and covers the peripheral edge surface can be uniformly irradiated with ultraviolet light. The peripheral end face can be protected.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of the rotary table of this embodiment. FIG. 2 is a front view of the rotary table. 3 is a cross-sectional view taken along line III-III in FIG.
[0025]
As shown in FIGS. 1 and 2, the rotary table 10 of this embodiment is a disc that rotates around the central axis 12 by directly connecting the central axis 12 to a drive motor (not shown). The rotary table 10 is provided with disk mounting portions 14a and 14b for mounting the optical disk D on which the two disk plates D1 and D2 coated with UV resin are bonded to each other by a bonding device (not shown). Eight are provided at equal intervals in the direction. In addition, 12 cm disk mounting portions 14 a for mounting 12 cm disks are provided at 90 ° intervals along the circumferential direction of the rotary table 10, and an 8 cm disk mounting portion 12 b for mounting 8 cm disks is also provided on the rotary table 10. It is provided between the 12 cm disc mounting portions 12a at 90 ° intervals along the circumferential direction.
[0026]
As for the rotary table 10, one place in the circumferential direction is a loading place 16 where the optical disk D is loaded by a transfer device (not shown), and the other optical disk is carried out by the transfer device (not shown). It is an unloading point 18. An ultraviolet irradiation unit 20 is provided at a place where the charging portion 16 is rotated by 90 ° about the axis of the turntable 10.
[0027]
Therefore, when the turntable 10 is rotated 90 ° after the optical disk D is mounted at the insertion point 16, the optical disk D is positioned in the ultraviolet irradiation unit 20, so that the optical disk D can be irradiated with ultraviolet light. At the same time, a new optical disk D is mounted at the insertion point 14, and the optical disk D that has been previously input and has been irradiated with ultraviolet rays can be discharged at the discharge point 18. Similarly, every time the turntable 10 is rotated by 90 °, the optical disk D is inserted, the ultraviolet ray UV irradiation, and the optical disk D are discharged simultaneously.
[0028]
Here, the disk mounting part first positioned at the loading place 16 is switched to either the 12 cm disk mounting part 14a or the 8 cm disk mounting part 14b, that is, the initial position of the rotary table 10 is changed by 45 °. Thus, ultraviolet UV irradiation can be performed for both 12 cm discs and 8 cm discs.
[0029]
Based on FIG. 3, the structure of the disk mounting parts 14a and 14b will be described. As the disk mounting portions 14 a and 14 b, the rotary table 10 is provided with a circular opening 34 with two steps 30 and 32, and a ring shape fixed to the step 32 below the opening 34 by screws 40. A transparent glass 36 on which the optical disk D is placed is supported by the glass fixing frame 38. Since the transparent glass 36 transmits the ultraviolet rays UV, the optical disc D can be irradiated with the ultraviolet rays UV from below.
[0030]
On the upper surface of the glass fixing frame 38, a ring-shaped reflecting mirror portion 42 that reflects ultraviolet rays UV to the vicinity of the periphery of the optical disc D placed on the disc placement portions 14a and 14b is fixed by screws 44. A step 46 is formed on the lower surface side of the inner peripheral edge of the glass fixing frame 38. The peripheral edge of the transparent glass 36 is held between the lower surface of the reflecting mirror part 42 and the step 46 of the glass fixing frame 38. A centering member 48 for mounting the optical disk D is fixed to the center of the transparent glass 36.
In the ultraviolet irradiation unit 20, ultraviolet lamps 22 are installed above and below the rotary table 10. Since the ultraviolet rays UV are uniformly irradiated from above and below, the UV resin is rapidly cured, so that even if the ultraviolet rays UV are strengthened, thermal deformation of the optical disc D is suppressed.
[0031]
By the way, the present invention is not limited to the above-described embodiments, and various modifications are possible.
For example, in the above embodiment, a 12 cm optical disk and an 8 cm optical disk can be switched. However, if the disk has the same structure as the optical disk D, it can be changed to a large or small number of types of disks. .
[0032]
Moreover, in the said Example, although the reflective mirror part 34 was a concave mirror in the longitudinal cross section, in order to work easily, the reflective mirror part 34 is good also as a cone surface inclined 45 degrees with respect to the transparent glass 36. FIG. In this case, in the longitudinal section, the ultraviolet ray UV is reflected in the vicinity of the peripheral edge of the optical disk D as a parallel light beam. Since the entire UV resin that protrudes from the peripheral edge of D and covers the peripheral edge face is uniformly irradiated, the adhesion near the peripheral edge can be further strengthened and the peripheral edge face can be reliably protected.
[0033]
Furthermore, the rotary table 10 of the above embodiment performs the ultraviolet irradiation process on the optical disk D, but the disk mounting parts 14a and 14b are changed to an article mounting part for mounting an article other than the optical disk D. By doing so, it can be changed so that it can be used for various treatments such as drying, painting, printing, and measurement in addition to ultraviolet irradiation.
[0034]
【The invention's effect】
As is apparent from the above description, according to the invention according to claim 1, in the rotary table used when various kinds of processing are performed on the placed article, the article placement portions of a plurality of types of articles are alternately arranged. Since it is provided at equal intervals, by switching the article placement portion that is first positioned at the loading position, it is possible to perform various operations without reducing production efficiency in response to any of a plurality of types of articles. .
[0035]
According to the second aspect of the present invention, in the rotary table used when irradiating the placed disk with ultraviolet rays, the disk placing portions for large and small kinds of disks are provided alternately and at equal intervals. By switching the disk mounting part positioned at the loading position, it is possible to irradiate ultraviolet rays corresponding to both large and small types of disks, and at this time, without lowering the production efficiency and at the periphery of the disk Curing of the UV resin does not become insufficient.
[0036]
According to the third aspect of the present invention, in the rotary table used when the mounted disk is irradiated with ultraviolet rays, the 12 cm disk mounting part and the 8 cm disk mounting part are alternately provided at equal intervals. By switching the disk mounting portion that is first positioned at the loading position, it is possible to perform an ultraviolet irradiation process corresponding to both the 12 cm disk and the 8 cm disk, and at this time, without reducing the production efficiency, Moreover, curing of the UV resin at the periphery of the disk does not become insufficient.
[0037]
According to the fourth aspect of the invention, the disc mounting portion is formed by attaching transparent glass to the opening provided in the rotary table. Therefore, the disc is irradiated with ultraviolet rays from above and below to cure the UV resin. Even if the speed is increased, thermal deformation of the disk can be prevented.
[0038]
According to the fifth aspect of the present invention, since the reflecting mirror part that reflects the ultraviolet rays to the vicinity of the periphery of the disk placed on the disk placing part is provided on the periphery of the transparent glass, the UV resin near the periphery of the disk is cured. Be certain.
[0039]
According to the sixth aspect of the present invention, the reflecting mirror portion is formed of a conical surface that forms an angle of 45 ° with the transparent glass, so that the reflecting mirror portion is easily manufactured and protrudes from the peripheral edge of the disk. Since the entire UV resin covering the peripheral edge face is uniformly irradiated, the adhesion near the peripheral edge can be further strengthened and the peripheral edge face can be reliably protected.
[Brief description of the drawings]
FIG. 1 is a plan view of a rotary table according to an embodiment of the present invention.
FIG. 2 is a front view of the rotary table.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a plan view showing an example of a conventional rotary table.
FIG. 5 is a longitudinal sectional view showing an example in which a conventional rotary table is used as a mirror surface.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Rotary table 14a, 14b Disk mounting part 20 Ultraviolet irradiation part 36 Transparent glass 42 Reflecting mirror part D Optical disk D1, D2 Disk plate UV Ultraviolet

Claims (6)

In a circular turntable used when placing an article placement section for placing an article along the circumferential direction and performing various treatments on the article,
An article placement section for placing an article of a predetermined size or shape is provided at equal intervals along the circumferential direction of the table, and the article is placed between the article placement sections at equal intervals in the circumferential direction. A rotary table provided with an article placement section for placing an article of a size or shape different from that of the article. In the circular rotary table used when curing the UV curable resin applied to the disk by UV irradiation,
A disk mounting portion for mounting a disk having a predetermined diameter is provided at equal intervals along the circumferential direction of the rotary table, and a diameter different from that of the disk between the disk mounting portions at equal intervals in the circumferential direction. A rotary table provided with a disk mounting portion for mounting the disk. In a circular rotary table used when manufacturing a disk by curing an ultraviolet curable resin sandwiched between two disk plates by ultraviolet irradiation,
A disc on which 12 cm discs are placed at equal intervals along the circumferential direction of the rotary table, and an 8 cm disc is placed between the disc placement portions at equal intervals in the circumferential direction. A rotary table provided with a mounting portion. The rotary table according to claim 2 or 3, wherein the disk mounting portion has a transparent glass attached to an opening provided in the rotary table. The rotary table according to claim 4, further comprising a reflecting mirror part that reflects ultraviolet rays toward the periphery of the disk placed on the disk placing part on the periphery of the transparent glass. 6. The rotary table according to claim 5, wherein the reflecting mirror part is formed of a conical surface forming an angle of 45 degrees with the transparent glass.

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