JPH04366437A - Fitting device for hub of optical disk - Google Patents
Fitting device for hub of optical diskInfo
- Publication number
- JPH04366437A JPH04366437A JP14189291A JP14189291A JPH04366437A JP H04366437 A JPH04366437 A JP H04366437A JP 14189291 A JP14189291 A JP 14189291A JP 14189291 A JP14189291 A JP 14189291A JP H04366437 A JPH04366437 A JP H04366437A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- optical disk
- adhesive
- disk
- chucking member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 43
- 239000000853 adhesive Substances 0.000 claims abstract description 27
- 230000001070 adhesive effect Effects 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、光ディスク駆動装置へ
の調芯用クランプ部材であるハブを、光ディスクに取り
付けるハブ取付装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hub attachment device for attaching a hub, which is a clamp member for centering an optical disk drive, to an optical disk.
【０００２】0002
【従来の技術】光ディスクは情報処理の分野において急
速に普及しつつある媒体であり、その構造は、おおよそ
図１に示したように、ポリカーボネート等のディスク基
板１１の情報読み取り面にハードコート１２が設けられ
、その反対側には記録膜１３が製膜されており、該記録
膜上に保護コート１４が形成され、光ディスク駆動装置
への調芯用クランプ部材であるハブ３が取り付けられて
いる。大容量の情報を処理する場合には、図１の記録膜
面を内側にして、ホットメルト接着剤等で貼り合わせた
タイプの光ディスクが用いられる。光ディスクの記録再
生時には、光ディスク上のハブが光ディスク駆動装置内
のスピンドルにクランプ固定されると同時に、ハブの中
心に設けられた調芯用穴がスピンドルの調芯用シャフト
に嵌合し、光ディスクの回転中心となる。ハブが光ディ
スクに取り付けられる時に、ハブの調芯用穴と光ディス
クに設けられている案内溝の中心との偏芯が大きくなる
と、光ディスク駆動装置の動作時に光ピックアップがト
ラッキングエラーを起こすので、光ピックアップの追従
が確実に行われるためには、光ディスクへのハブの取り
付けが高精度になされる必要がある。とりわけ情報転送
速度の高速化には光ディスクの高速回転が必要とされ、
その為には高い偏芯精度が要求される。2. Description of the Related Art Optical discs are media that are rapidly becoming popular in the field of information processing, and their structure is roughly as shown in FIG. A recording film 13 is formed on the opposite side thereof, a protective coat 14 is formed on the recording film, and a hub 3, which is a clamp member for aligning the optical disc drive device, is attached. When processing a large amount of information, an optical disk of the type shown in FIG. 1, which is bonded with a hot melt adhesive or the like with the recording film side facing inside, is used. During recording and playback of an optical disc, the hub on the optical disc is clamped and fixed to the spindle in the optical disc drive, and at the same time, the alignment hole provided at the center of the hub fits into the alignment shaft of the spindle, and the optical disc is aligned. It becomes the center of rotation. When the hub is attached to the optical disk, if the eccentricity between the centering hole of the hub and the center of the guide groove provided on the optical disk becomes large, the optical pickup will cause a tracking error during operation of the optical disk drive, so the optical pickup In order to reliably follow the information, it is necessary to attach the hub to the optical disk with high precision. In particular, increasing the speed of information transfer requires high-speed rotation of optical discs.
For this purpose, high eccentricity accuracy is required.
【０００３】ハブの取り付け方法には超音波溶着法と紫
外線硬化樹脂等の接着剤を用いた方法とがある。前者は
取り付けに要する時間が短く、作業性の面で優れるが、
後者は基本的にディスク基板やハブの材質として、様々
な材料が使用可能となる点で有利である。後者について
詳しく述べると、ハブ取付装置は光ディスクの偏芯測定
手段と、光ディスクの中心位置を補正する偏芯補正手段
と、接着剤塗布手段と、ハブチャッキング部材に吸着さ
れたハブをディスクに圧締するハブ圧締手段と、接着剤
を硬化するための紫外線照射手段とからなる。具体的に
は、図２において、光ディスクはＸ−Ｙテーブル５上の
光ディスク受け部９に吸着固定され、光ピックアップ６
により偏芯の測定が行われる。偏芯の測定にはＣＣＤが
用いられることもある。ディスペンサー７によりハブ接
着部に接着剤を塗布した後、測定値に基づいて光ディス
クの偏芯がＸ−Ｙステージ５、スピンドルモータ４によ
り補正され、光ディスクの案内溝の中心はハブチャッキ
ング部材２に設けられた調芯用シャフトのＺ軸上に移動
される。そして、上下移動可能に設置されたハブチャッ
キング部材２が下降することによりハブが押し付けられ
、接着剤が十分に引き延ばされた時点で紫外線が照射さ
れ、接着剤が硬化、ハブの取り付けが完了する。このよ
うなハブ取付装置のハブチャッキング部材２には、従来
、図５に示したような単にハブ吸着面２６と調芯用シャ
フト２４を有したものが用いられてきた。There are two methods for attaching the hub: an ultrasonic welding method and a method using an adhesive such as an ultraviolet curing resin. The former requires less time to install and is superior in terms of workability, but
The latter is basically advantageous in that various materials can be used as materials for the disk substrate and hub. To explain the latter in detail, the hub mounting device includes a means for measuring the eccentricity of an optical disk, an eccentricity correcting means for correcting the center position of the optical disk, an adhesive applying means, and a means for pressing the hub attracted by the hub chucking member onto the disk. It consists of a hub clamping means for tightening the adhesive, and an ultraviolet irradiation means for curing the adhesive. Specifically, in FIG. 2, the optical disc is suctioned and fixed to the optical disc receiving part 9 on the X-Y table 5, and
The eccentricity is measured by A CCD is sometimes used to measure eccentricity. After the adhesive is applied to the hub adhesive part by the dispenser 7, the eccentricity of the optical disc is corrected by the X-Y stage 5 and the spindle motor 4 based on the measured value, and the center of the guide groove of the optical disc is aligned with the hub chucking member 2. It is moved onto the Z axis of the provided alignment shaft. Then, the hub chucking member 2, which is installed to be able to move up and down, is lowered to press against the hub, and when the adhesive is sufficiently stretched, it is irradiated with ultraviolet rays to harden the adhesive and allow the hub to be attached. Complete. Conventionally, the hub chucking member 2 of such a hub mounting device has been used, as shown in FIG. 5, which simply has a hub suction surface 26 and an alignment shaft 24.
【０００４】0004
【発明が解決しようとする課題】しかしながら、ハブ取
付装置を頻繁に使用した場合に、スピンドルの光ディス
ク受け部９とハブチャッキング部材２の水平面に傾きが
生じてくる問題があった。そのために、定期的なメンテ
ナンスにより、ハブチャッキング部材２の機械的な調整
を行なうことが必要とされていた。更にハブ３について
も、ハブの接着部分の厚み分布があるために、ハブチャ
ッキング部材の吸着面２６が水平を保持していたとして
も、厚み分布の分、接着面は傾きを有することになる。
このような厚み分布を有するハブが接着された場合、接
着剤が均一に延びなくなり、その結果、接着むらが生じ
て所定の接着強度が得られなくなることが多かった。ま
た、ハブが片押しされるために光ディスクが歪み、ハブ
に対して光ディスクが傾いた状態で取り付けられ、光デ
ィスクの反りや面振れが増大するという問題が生じてい
た。However, when the hub mounting device is used frequently, there is a problem in that the horizontal planes of the optical disk receiving portion 9 of the spindle and the hub chucking member 2 are tilted. Therefore, it has been necessary to mechanically adjust the hub chucking member 2 through periodic maintenance. Furthermore, regarding the hub 3, since there is a thickness distribution of the adhesive part of the hub, even if the suction surface 26 of the hub chucking member remains horizontal, the adhesive surface will have an inclination due to the thickness distribution. . When hubs having such a thickness distribution are bonded, the adhesive does not spread uniformly, and as a result, uneven bonding occurs and a predetermined bonding strength cannot be obtained in many cases. In addition, the optical disk is distorted because the hub is pushed to one side, and the optical disk is installed in an inclined state with respect to the hub, resulting in an increase in warpage and surface runout of the optical disk.
【０００５】本発明が解決しようとする課題は、光ディ
スクにハブを取り付ける際の光ディスクの歪みを軽減し
、機械特性の優れた光ディスクを提供することにある。[0005] The problem to be solved by the present invention is to reduce the distortion of the optical disc when a hub is attached to the optical disc, and to provide an optical disc with excellent mechanical properties.
【０００６】[0006]
【課題を解決するための手段】上記課題は、ハブ取り付
け装置のハブチャッキング部材２に、緩衝部材を設ける
ことにより解決される。以下、図面を用いて本発明を詳
細に説明する。[Means for Solving the Problems] The above problems are solved by providing the hub chucking member 2 of the hub mounting device with a buffer member. Hereinafter, the present invention will be explained in detail using the drawings.
【０００７】本発明によるハブチャッキング部材を図３
及び図４に示したが、中心にはハブの調芯用穴に挿入さ
れるシャフト２４が設けられており、ハブが直接吸着さ
れる部分には緩衝部材が設けられている。また、ハブが
直接接触する部分には、ハブの変形防止板２３を設けて
もよい。緩衝部材としては、ゴム系樹脂、発泡樹脂、ば
ね等が好適である。FIG. 3 shows a hub chucking member according to the present invention.
As shown in FIG. 4, a shaft 24 is provided at the center to be inserted into the alignment hole of the hub, and a buffer member is provided at the portion where the hub is directly attracted. Further, a hub deformation prevention plate 23 may be provided at a portion where the hub comes into direct contact. As the buffer member, rubber resin, foamed resin, spring, etc. are suitable.
【０００８】本発明によるハブ取付装置を用いてハブの
取り付けを行った場合、ハブの吸着面が光ディスクの接
着面に合わせて自在に動作可能となるので、ハブの吸着
面と光ディスクの水平に少々傾きが生じていても、ハブ
が光ディスクに傾いて取り付けられることがなくなる。
同時に、接着剤の伸びが均一になり、良好な外観が得ら
れると共に、充分な接着強度が得られる。ハブの吸着面
は自在に動作可能であるが、シャフトは固定されている
ので調芯機能が阻害されることは無く、高精度のハブの
取り付けが可能となる。When the hub is attached using the hub attachment device according to the present invention, the suction surface of the hub can move freely in accordance with the adhesion surface of the optical disk, so that the suction surface of the hub and the optical disk are slightly parallel to each other. Even if the hub is tilted, the hub will not be attached to the optical disk tilted. At the same time, the adhesive spreads uniformly, providing a good appearance and sufficient adhesive strength. The suction surface of the hub can move freely, but since the shaft is fixed, the alignment function is not hindered, and the hub can be mounted with high precision.
【０００９】[0009]
（実施例１）図４に示したように、金属バネを緩衝部材
として用いたハブチャッキング部材を用いてハブの接着
を行った。ディスク基板には８６ｍｍφのポリカーボネ
ート製基板を用い、日泉化学工業製の樹脂モールドタイ
プのインサート型ハブを接着した。接着剤には日本ロッ
クタイト製接着剤「３４９」を使用した。接着剤塗布量
を５０ｍｇ、ハブの圧締力を１ｋｇとして、ハブ吸着面
とディスク基板の傾きは １．５ｍｒａｄとした。この
ようにしてハブを取り付けた結果、当初、ハブとディス
ク基板の接着面は傾いていたにも関わらず、ディスクの
反りは２ｍｒａｄ以下、面振れは８０μｍ以下の高精度
のハブ取り付けが可能であった。ハブの接着強度は １
００ｋｇと充分な強度を示した。(Example 1) As shown in FIG. 4, a hub was bonded using a hub chucking member using a metal spring as a buffer member. A polycarbonate substrate with a diameter of 86 mm was used as the disk substrate, and a resin molded insert type hub manufactured by Nissei Chemical Industry Co., Ltd. was adhered thereto. Adhesive "349" manufactured by Nippon Loctite was used as the adhesive. The amount of adhesive applied was 50 mg, the clamping force of the hub was 1 kg, and the inclination between the hub suction surface and the disk substrate was 1.5 mrad. As a result of attaching the hub in this way, even though the adhesive surface between the hub and the disk substrate was initially tilted, it was possible to attach the hub with high precision, with disk warpage of less than 2mrad and surface runout of less than 80μm. Ta. The adhesive strength of the hub is 1
00kg, which showed sufficient strength.
【００１０】（実施例２）図３に示したハブチャッキン
グ部材の緩衝部材として厚さ３ｍｍの発泡シートを用い
、実施例１と同様にハブ吸着面とディスク基板の傾きを
１．５ｍｒａｄとしてハブの取り付けを行ったところ
、均一なハブの接着ができた。得られたディスクの反り
は１．８ｍｒａｄ以下、面振れは７０μｍ以下の良好な
機械特性を示した。
また、ハブの接着強度は １００ｋｇと充分な接着強度
を示した。(Example 2) A foam sheet with a thickness of 3 mm was used as the buffer member of the hub chucking member shown in FIG. When I installed the hub, I was able to adhere the hub evenly. The obtained disk exhibited good mechanical properties, with warpage of 1.8 mrad or less and surface runout of 70 μm or less. In addition, the adhesive strength of the hub was 100 kg, which was sufficient.
【００１１】（比較例１）図５に示した従来のハブチャ
ッキング部材を用い、ハブ吸着面とディスク基板の傾き
を ０．５ｍｒａｄとして、実施例１と同様にハブの取
り付けを行ったところ、均一なハブの接着ができた。得
られたディスクの反り角は ２．５ｍｒａｄ以下、面振
れは１２０μｍ以下と良好な特性が得られた。ハブの接
着強度も９０ｋｇと充分な強度を示した。(Comparative Example 1) Using the conventional hub chucking member shown in FIG. 5, the hub was attached in the same manner as in Example 1, with the inclination between the hub suction surface and the disk substrate set to 0.5 mrad. Uniform hub adhesion was achieved. The resulting disk had good characteristics, with a warp angle of 2.5 mrad or less and a surface runout of 120 μm or less. The adhesive strength of the hub was also 90 kg, which was sufficient.
【００１２】（比較例２）図５に示した従来のハブチャ
ッキング部材を用い、実施例１と同様にハブ吸着面とデ
ィスクの傾きを １．５ｍｒａｄとしてハブの取り付け
を行った。得られたディスクの反りは４ｍｒａｄ、面振
れは１５０μｍであり、不十分な特性にとどまった。接
着剤の伸びは不均一であり、明らかにハブの圧締むらが
観察された。ハブの接着強度は７０ｋｇであった。(Comparative Example 2) Using the conventional hub chucking member shown in FIG. 5, a hub was attached in the same manner as in Example 1, with the inclination of the hub suction surface and the disk set to 1.5 mrad. The warpage of the obtained disk was 4 mrad, the surface runout was 150 μm, and the characteristics remained unsatisfactory. The adhesive spread was uneven, and uneven compression of the hub was clearly observed. The adhesive strength of the hub was 70 kg.
【００１３】[0013]
【発明の効果】本発明によるハブ取付装置を用いてハブ
の取り付けを行った場合、ハブを光ディスクに水平に取
り付けることができる。また、接着剤の伸びも均一とな
り、良好な外観が得られると共に、充分な接着強度が得
られる。更に、ハブの吸着面は自在に動作可能であるが
、シャフトは固定されているので調芯機能が阻害される
ことは無く、高精度のハブの取り付けが可能となる。[Effects of the Invention] When a hub is attached using the hub attaching device according to the present invention, the hub can be attached horizontally to an optical disk. Furthermore, the adhesive spreads uniformly, providing a good appearance and sufficient adhesive strength. Further, although the suction surface of the hub can freely move, since the shaft is fixed, the centering function is not hindered, and the hub can be mounted with high precision.
【００１４】[0014]
【００１５】[0015]
【図１】光ディスクの構造を示した縦断面図である。FIG. 1 is a longitudinal cross-sectional view showing the structure of an optical disc.
【００１６】[0016]
【図２】紫外線硬化型接着剤を用いたハブ取り付け装置
の概略図である。FIG. 2 is a schematic diagram of a hub attachment device using an ultraviolet curable adhesive.
【００１７】[0017]
【図３】本発明によるハブチャッキング部材の断面図で
ある。FIG. 3 is a cross-sectional view of a hub chucking member according to the invention.
【００１８】[0018]
【図４】本発明によるバネを利用したハブチャッキング
部材の断面図である。FIG. 4 is a cross-sectional view of a hub chucking member using a spring according to the present invention.
【００１９】[0019]
【図５】従来技術によるハブチャッキング部材の断面図
である。FIG. 5 is a sectional view of a hub chucking member according to the prior art.
【００２０】[0020]
１ 光ディスク ２ ハブチャッキング部材 ２ａ ハブチャッキング部材 ２ｂ ハブチャッキング部材 ２ｃ ハブチャッキング部材 ３ ハブ ４ スピンドルモータ ５ Ｘ−Ｙステージ ６ 光ピックアップ ７ ディスペンサー ８ 紫外線光源 ９ 光ディスク受け部 １１ ディスク基板 １２ ハードコート １３ 記録膜 １４ 保護コート ２１ 緩衝部材 ２２ バネ ２３ ハブ変形防止板 ２４ 調芯用シャフト ２５ 吸引口 ２６ ハブ吸着面 1 Optical disc 2 Hub chucking member 2a Hub chucking member 2b Hub chucking member 2c Hub chucking member 3 Hub 4 Spindle motor 5 X-Y stage 6. Optical pickup 7 Dispenser 8 Ultraviolet light source 9 Optical disc receiving part 11 Disk board 12 Hard court 13 Recording film 14 Protective coat 21 Buffer member 22 Spring 23 Hub deformation prevention plate 24 Alignment shaft 25 Suction port 26 Hub suction surface
Claims (1)
ハブを取り付けるハブ取付装置において、ハブチャッキ
ング部材に緩衝部材を設けたことを特徴とするハブ取付
装置。1. A hub attaching device for attaching a hub to the center of an optical disk using an adhesive, characterized in that the hub chucking member is provided with a buffer member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14189291A JPH04366437A (en) | 1991-06-13 | 1991-06-13 | Fitting device for hub of optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14189291A JPH04366437A (en) | 1991-06-13 | 1991-06-13 | Fitting device for hub of optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04366437A true JPH04366437A (en) | 1992-12-18 |
Family
ID=15302596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14189291A Pending JPH04366437A (en) | 1991-06-13 | 1991-06-13 | Fitting device for hub of optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04366437A (en) |
-
1991
- 1991-06-13 JP JP14189291A patent/JPH04366437A/en active Pending
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