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JPH06297309A - Automatic lens edger - Google Patents

Automatic lens edger

Info

Publication number
JPH06297309A
JPH06297309A JP11360693A JP11360693A JPH06297309A JP H06297309 A JPH06297309 A JP H06297309A JP 11360693 A JP11360693 A JP 11360693A JP 11360693 A JP11360693 A JP 11360693A JP H06297309 A JPH06297309 A JP H06297309A
Authority
JP
Japan
Prior art keywords
lens
groove
grindstone
center
end surface
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
Application number
JP11360693A
Other languages
Japanese (ja)
Inventor
Sadao Takubo
定雄 田窪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takubo Seiki Seisakusho KK
Original Assignee
Takubo Seiki Seisakusho KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Takubo Seiki Seisakusho KK filed Critical Takubo Seiki Seisakusho KK
Priority to JP11360693A priority Critical patent/JPH06297309A/en
Publication of JPH06297309A publication Critical patent/JPH06297309A/en
Pending legal-status Critical Current

Links

Landscapes

  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

PURPOSE:To enable accurate measurement even in a soft and thin plastic lens by rotating the lens in such a state that the end surface of a spectacle lens has been received by a V-groove, and by detecting the displacement in the perpendicular direction to the V-groove for obtaining the width-directional center of the end surface of the lens. CONSTITUTION:In an automatic lens edger by which a lens is successively ground by a rough grindstone 24, intermediate grindstones 25, 26, and a finishing grindstone 27 so that the outline of a spectacle lens 6 fixedly held between chucking shafts can be conformed with the shape of a spectacle frame; when the orbit of the width- directional center of the end surface of the lens 6 is to be obtained, the end surface of the lens 6 is fitted in the V-groove provided to the outer circumference of the intermediate grindstone 25, and only the lens 6 is turned by a motor. By turning the lens 6 while sliding along the sloped surface of the V-groove, the aligning of the thickness center of the lens end surface with the width center of the intermediate grindstone 25 can be carried out. The movement of a head frame 5 at that time is detected by an encoder through a level arm 4 and a belt 23, and on the basis of this movement and the change in the turning angle of the lens, the width center of the end surface of the lens 6 is calculated by a control unit.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、メガネレンズの平面形
状をメガネフレームの形状に正確に合致させる様研削す
る自動玉摺機の制御装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an automatic ball slicing machine, which grinds a spectacle lens so that the plane shape of the spectacle lens exactly matches the shape of a spectacle frame.

【0002】[0002]

【従来の技術】メガネレンズをメガネフレームに適正に
嵌込むには、メガネレンズの周端面をメガネフレームの
溝に合致する様、メガネレンズの平面形状をメガネフレ
ームの平面形状に合致する様研削しなければならない。
2. Description of the Related Art In order to properly fit a spectacle lens into a spectacle frame, grinding is performed so that the peripheral end surface of the spectacle lens matches the groove of the spectacle frame and the plane shape of the spectacle lens matches the plane shape of the spectacle frame. There must be.

【0003】本出願人は、特公昭58-43227号に於いてメ
ガネレンズの周端面をメガネフレームの溝に正確に合致
するヤゲン(メガネレンズ周縁の凸形状)に研削する自
動玉摺機を提案し、且具体化した。
The applicant proposes, in Japanese Patent Publication No. 58-43227, an automatic ball slicing machine that grinds the peripheral edge surface of the spectacle lens into a bevel (convex shape of the rim of the spectacle lens) that exactly matches the groove of the spectacle frame. And made it concrete.

【0004】これら、自動玉摺機について図3〜図8に
於いて説明する。
These automatic ball mills will be described with reference to FIGS.

【0005】ベース1に固着した軸受2に軸3を軸心方
向(水平方向)に滑動可能に支承せしめ、該軸3にレベ
ルアーム4を固着すると共にヘッドフレーム5を回転自
在に取付ける。ヘッドフレーム5にはレンズ6をチャッ
キングする為の凹部7を形成し、該凹部7を貫通する一
対のチャッキングシャフト8,9を設けており、レベル
アーム4側のチャッキングシャフト8を回転自在に設
け、レベルアーム側端を外形形状(レンズの半径方向に
関する形状)に関する倣型10を着脱可能に取付け得る
様構成し、該チャッキングシャフト8の他端にチャッキ
ングヘッド11を設けている。
A shaft 3 is supported by a bearing 2 fixed to a base 1 so as to be slidable in the axial direction (horizontal direction), a level arm 4 is fixed to the shaft 3, and a head frame 5 is rotatably attached. A recess 7 for chucking the lens 6 is formed in the head frame 5, and a pair of chucking shafts 8 and 9 penetrating the recess 7 are provided. The chucking shaft 8 on the level arm 4 side is rotatable. The level arm side end is configured so that the copying die 10 relating to the outer shape (shape in the radial direction of the lens) can be detachably attached, and the chucking head 11 is provided at the other end of the chucking shaft 8.

【0006】又、前記倣型10の下方に位置せしめ後記
する砥石の研削面と同レベル同半径の案内面を有する案
内板18をレベルアーム4に設け、前記倣型10が該案
内板18に当接しながらチャッキングシャフト8,9が
回転するとヘッドフレーム5が倣型10の形状に従い上
下動する様になっている。他方のチャッキングシャフト
9を回転自在且軸心方向に摺動自在に設け、一端には前
記チャッキングヘッド11と対をなすチャッキングヘッ
ド12を取付け、他端はチャッキングシャフト9を軸心
方向に駆動するエアシリンダ等のアクチュエータ13に
連結せしめている。
Further, a guide plate 18 having a guide surface having the same level and the same radius as the grinding surface of a grindstone, which is positioned below the copying die 10, is provided on the level arm 4, and the copying die 10 is mounted on the guiding plate 18. When the chucking shafts 8 and 9 rotate while making contact with each other, the head frame 5 moves up and down according to the shape of the copying die 10. The other chucking shaft 9 is provided rotatably and slidably in the axial direction, the chucking head 12 paired with the chucking head 11 is attached to one end, and the chucking shaft 9 is attached to the other end in the axial direction. It is connected to an actuator 13 such as an air cylinder that is driven by the.

【0007】前記チャッキングシャフト8,9にはギア
列14,15を介しレンズ回転用モータ16及びレンズ
回転角度検出パルスエンコーダ17をそれぞれ連結す
る。該回転用モータ16及び回転角度検出パルスエンコ
ーダ17はいずれもヘッドフレーム5に設けられてお
り、ヘッドフレーム5と一体的に回動する様になってい
る。前記軸3に平行となる様水平駆動パルスモータ19
と水平位置検出パルスエンコーダ20をベース1に配設
し、該水平駆動パルスモータ19のプーリ21と水平位
置検出パルスエンコーダ20のプーリ22とにベルト2
3を懸回し、該ベルト23と前記レベルアーム4とを連
結する。
A lens rotation motor 16 and a lens rotation angle detection pulse encoder 17 are connected to the chucking shafts 8 and 9 via gear trains 14 and 15, respectively. The rotation motor 16 and the rotation angle detection pulse encoder 17 are both provided on the head frame 5 so as to rotate integrally with the head frame 5. Horizontal drive pulse motor 19 to be parallel to the shaft 3
And the horizontal position detection pulse encoder 20 are arranged on the base 1, and the belt 2 is attached to the pulley 21 of the horizontal drive pulse motor 19 and the pulley 22 of the horizontal position detection pulse encoder 20.
3 is suspended to connect the belt 23 and the level arm 4.

【0008】前記した水平駆動パルスモータ19は通電
時にはプーリ21を確動させるが、非通電時にはプーリ
21は抵抗なく自在に回転し得る様に構成する。又、チ
ャッキングヘッド11,12の下方には所要数の砥石2
4,25,26,27を配設し、該砥石24,25,2
6,27の支持軸は図示しない回転装置に結合する。砥
石の研削面は用途に応じ形状が異なっており、荒摺用砥
石24は平面であり、中間砥石25,26はレンズ厚み
より更に広がった傾斜面28,29を有し、仕上砥石2
7はメガネフレームの溝と同一形状を有している。
The above-mentioned horizontal drive pulse motor 19 causes the pulley 21 to move accurately when energized, but the pulley 21 can freely rotate without resistance when not energized. Further, below the chucking heads 11 and 12, a required number of grindstones 2 are provided.
4, 25, 26, 27 are provided, and the grindstones 24, 25, 2
The support shafts 6, 27 are connected to a rotating device (not shown). The shape of the grinding surface of the grindstone is different depending on the application, the rough grinding wheel 24 is a flat surface, and the intermediate grindstones 25 and 26 have inclined surfaces 28 and 29 that are wider than the lens thickness.
Reference numeral 7 has the same shape as the groove of the spectacle frame.

【0009】前記レンズ回転角度検出パルスエンコーダ
17、水平位置検出パルスエンコーダ20、水平駆動パ
ルスモータ19はそれぞれ制御装置30に接続されてお
り、制御装置30は記憶装置(マイクロコンピュータ)
と駆動回路を備え、前記両パルスエンコーダ17,20
の検出結果を記憶し、該検出結果を基に水平駆動パルス
モータ19を駆動せしめる様になっている。尚、図中3
1はローラ、32はガイドレールを示す。
The lens rotation angle detecting pulse encoder 17, the horizontal position detecting pulse encoder 20, and the horizontal drive pulse motor 19 are respectively connected to a control device 30, and the control device 30 is a storage device (microcomputer).
And a drive circuit, and the both pulse encoders 17, 20
The detection result is stored and the horizontal drive pulse motor 19 is driven based on the detection result. In addition, 3 in the figure
Reference numeral 1 is a roller, and 32 is a guide rail.

【0010】先ず研削すべきレンズ6の形状に合致する
倣型10をチャッキングシャフト8に取付け、次にレン
ズ6を倣型10と姿勢が同一になる様位置合せしながら
チャッキングヘッド11,12にて保持する。レンズ厚
み方向(水平方向)に関しレンズ6の中心と荒摺用砥石
24の中心とを略合致させる。荒摺用砥石24及びレン
ズ6とを回転させレンズ6を荒摺用砥石24に当接せし
め(該状態では倣型10と案内板18とも当接してい
る)研削を開始する。レンズ6は倣型10によりレンズ
形状に従って上下動し、端面は平に研削される。この時
レンズ端面位置はレンズの形状、取付姿勢により水平方
向にふらつくが、このふらつき量よりも荒摺用砥石24
の研削面を広くしておけばよい。
First, a copying die 10 conforming to the shape of the lens 6 to be ground is attached to the chucking shaft 8, and then the chucking heads 11 and 12 are aligned while aligning the lens 6 with the copying die 10 in the same posture. Hold at. In the lens thickness direction (horizontal direction), the center of the lens 6 and the center of the rough grinding stone 24 are substantially aligned. The rough grinding wheel 24 and the lens 6 are rotated to bring the lens 6 into contact with the rough grinding wheel 24 (in this state, the copying die 10 and the guide plate 18 are also in contact) and grinding is started. The lens 6 moves up and down according to the shape of the lens by the copying die 10, and the end face is ground flat. At this time, the lens end surface position fluctuates in the horizontal direction depending on the shape of the lens and the mounting posture.
It is enough to make the ground surface of the wide.

【0011】荒摺が終了したら図示しない装置により荒
摺用砥石24とレンズ6とを離隔させ水平駆動パルスモ
ータ19によりベルト23、レベルアーム4、軸3を介
しヘッドフレーム5を荒摺用砥石24と研削に使用すべ
き中間砥石との距離だけ移動させる(この移動は手動で
行っても構わない)。
When the rough grinding is completed, the grindstone 24 for roughing and the lens 6 are separated from each other by a device (not shown), and the horizontal drive pulse motor 19 moves the head frame 5 through the belt 23, the level arm 4, and the shaft 3 to the grindstone for roughing 24. And the intermediate grindstone to be used for grinding are moved (this movement may be done manually).

【0012】レンズ6を位置決めしたら制御装置30を
リセットし、この位置を基準位置とし、斯かる状態で水
平パルスモータ19を非通電とし、水平方向にヘッドフ
レーム5を抵抗なく動き得る様にし、レンズ6をヘッド
フレーム5等の自重力で中間砥石25に当接させ研削を
開始する。
When the lens 6 is positioned, the control device 30 is reset, and this position is set as a reference position. In this state, the horizontal pulse motor 19 is de-energized so that the head frame 5 can move in the horizontal direction without resistance. 6 is brought into contact with the intermediate grindstone 25 by gravity of the head frame 5 or the like to start grinding.

【0013】レンズの水平方向の中心と中間砥石25の
中心とが合致していない場合、レンズ6の一方の角が図
8の如く中間砥石25の傾斜面28に当る。レンズ6に
はヘッドフレーム5等によ自重力Wが常に下方に働き、
又ヘッドフレーム5は水平方向に抵抗なく自在に動き得
るので、レンズ6は結局傾斜面に沿って矢印A方向に動
き、レンズ6と中間砥石25との中心が合致する。即ち
レンズ6はレンズ端面の水平方向の位置変化に追従し、
常にレンズ中心と中間砥石25との中心が合致する様水
平方向に動くことになる。この時のヘッドフレーム5の
動きをレベルアーム4、ベルト23を介し水平位置検出
パルスエンコーダ20により検出し制御装置30に入力
し、又レンズ6の回転角変化をレンズ回転角度検出パル
スエンコーダ17により検出し制御装置30に入力す
る。制御装置30は前2入力を基に、位置決め時のレン
ズ中心と砥石中心との誤差、レンズ6を回転させること
によって起る端面の位置変化を、回転角をパラメータと
して記憶する。
When the center of the lens in the horizontal direction and the center of the intermediate grindstone 25 do not coincide with each other, one corner of the lens 6 hits the inclined surface 28 of the intermediate grindstone 25 as shown in FIG. Due to the head frame 5 and the like, the own gravity W always acts downward on the lens 6,
Further, since the head frame 5 can freely move in the horizontal direction without resistance, the lens 6 eventually moves in the direction of arrow A along the inclined surface, and the centers of the lens 6 and the intermediate grindstone 25 coincide with each other. That is, the lens 6 follows the horizontal position change of the lens end face,
It always moves horizontally so that the center of the lens and the center of the intermediate grindstone 25 coincide with each other. The movement of the head frame 5 at this time is detected by the horizontal position detection pulse encoder 20 via the level arm 4 and the belt 23 and input to the control device 30, and the rotation angle change of the lens 6 is detected by the lens rotation angle detection pulse encoder 17. Input to the control device 30. The control device 30 stores the error between the center of the lens and the center of the grindstone at the time of positioning, and the position change of the end face caused by rotating the lens 6 based on the previous two inputs, using the rotation angle as a parameter.

【0014】中間研削が終了したらレンズ6を中間砥石
25から離隔させ、水平駆動パルスモータ19により中
間砥石25と仕上砥石27の離隔距離だけ移動させる。
この移動は予め制御装置30に入力した信号により制御
装置30が水平駆動パルスモータ19を駆動せしめるこ
とによって達せられる。
When the intermediate grinding is completed, the lens 6 is separated from the intermediate grindstone 25, and the horizontal drive pulse motor 19 moves the lens 6 by the separated distance between the intermediate grindstone 25 and the finishing grindstone 27.
This movement is achieved by the control device 30 driving the horizontal drive pulse motor 19 by a signal input to the control device 30 in advance.

【0015】次に、仕上研削は前記制御装置30が記憶
した端面の位置変化に合致する様、レンズの回転に同期
させ水平駆動パルスモータ19によりヘッドフレーム5
を強制的に水平移動させ、レンズ厚み方向の中心位置に
メガネフレームの溝に嵌合する周突状を形成する。
Next, the finish grinding is synchronized with the rotation of the lens so that the position change of the end face stored by the control device 30 matches, and the head frame 5 is driven by the horizontal drive pulse motor 19.
Is forcibly moved horizontally to form a circumferential projection that fits in the groove of the spectacle frame at the center position in the lens thickness direction.

【0016】又、メガネフレームの溝のカーブとレンズ
厚み方向の中心カーブとが一致しないものについては制
御装置30にメガネフレームの溝のカーブをセッティン
グ入力しておき、両エンコーダ17,20からの信号に
より合成したヘッドフレーム5水平移動プログラムを溝
カーブに合致する様補正し、該補正プログラムによって
水平駆動パルスモータ19を駆動させれば、レンズの中
心カーブとメガネフレームの溝カーブが相違していても
メガネフレームの溝に合致する周突状を形成することが
できる。
When the curve of the groove of the spectacle frame does not match the center curve in the lens thickness direction, the curve of the groove of the spectacle frame is set and input to the control device 30, and signals from both encoders 17 and 20 are input. Even if the center curve of the lens and the groove curve of the spectacle frame are different, if the horizontal movement pulse motor 19 is driven by the correction program by correcting the horizontal movement program of the head frame 5 synthesized by the above so as to match the groove curve. It is possible to form a circumferential projection that matches the groove of the spectacle frame.

【0017】[0017]

【発明が解決しようとする課題】前記した様に、レンズ
6端面の厚み中心と砥石の幅中心合わせは、中間砥石2
5のV溝の斜面28に前記レンズ6が片当りした場合、
レンズ6が前記斜面28に沿って谷方向(図8矢印A方
向)に滑り落ち、レンズ6が水平方向に移動してレンズ
6端面の厚み中心と中間砥石25の幅中心合わせが行わ
れる。ところが、近年ではプラスチックレンズで厚みの
薄いものが普及し、更に削り代の少ない而もレンズ材質
の柔らかいものが多くなった。従って、レンズ端面の厚
み中心と砥石の幅中心合わせが完了する前に削り代を削
ってしまう場合があり、V溝の中心をレンズ6が倣うこ
とができず、レンズ6端面の厚み中心を測定することが
できないことがある。
As described above, the center of thickness of the end face of the lens 6 and the width center of the grindstone are aligned with each other by the intermediate grindstone 2.
When the lens 6 is one-sided against the slope 28 of the V groove of 5,
The lens 6 slides down along the slope 28 in the valley direction (the direction of arrow A in FIG. 8), and the lens 6 moves in the horizontal direction to align the thickness center of the end face of the lens 6 with the width center of the intermediate grindstone 25. However, in recent years, thin plastic lenses have become widespread, and there are many soft lens materials with a small cutting allowance. Therefore, the cutting allowance may be cut before the center of the thickness of the lens end face and the width center of the grindstone are completed, and the lens 6 cannot follow the center of the V groove, and the thickness center of the end face of the lens 6 is measured. There are things you can't do.

【0018】本発明は斯かる実情に鑑み、プラスチック
レンズ等厚みの薄い而も材質の柔らかいレンズでも正確
に且確実にレンズの端面の厚み中心を測定し得る自動玉
摺機を提供しようとするものである。
In view of the above situation, the present invention aims to provide an automatic ball slicing machine capable of accurately and reliably measuring the thickness center of the end face of a lens such as a plastic lens having a small thickness and a soft material. Is.

【0019】[0019]

【課題を解決するための手段】本発明は、レンズを傾動
自在なヘッドフレームで回転可能に支持し、レンズを回
転させつつ砥石に当接させ、レンズ外形を所定の形状に
研削する様にした自動玉摺機に於いて、メガネレンズの
板厚より更に広がる傾斜面を有するV溝と、該V溝に前
記メガネレンズの端面を当接させ、該V溝に対してメガ
ネレンズの端面を相対回転可能とし、この相対回転によ
り生ずるV溝に対して直角方向の変位を検出する変位検
出器と、前記レンズの回転を検出する回転検出器と、前
記変位検出器と回転検出器の検出結果を基にメガネレン
ズの端面幅中心を求める制御装置とを具備することを特
徴とするものである。
According to the present invention, a lens is rotatably supported by a tiltable head frame, the lens is brought into contact with a grindstone while being rotated, and the lens outer shape is ground into a predetermined shape. In an automatic ball slicing machine, a V groove having an inclined surface that further expands the plate thickness of the spectacle lens and the end surface of the spectacle lens are brought into contact with the V groove, and the end surface of the spectacle lens is made to face the V groove. A displacement detector that is rotatable and detects a displacement in a direction perpendicular to the V groove generated by this relative rotation, a rotation detector that detects rotation of the lens, and a detection result of the displacement detector and the rotation detector. And a control device for obtaining the center of the end face width of the spectacle lens.

【0020】[0020]

【作用】メガネレンズをV溝に当接させ、更にメガネレ
ンズとV溝とを相対回転させることでV溝とメガネレン
ズとの間で芯合せ作用が生じ、V溝とメガネレンズ間で
得られた芯合せ情報を変位検出器で検出して、又回転位
置を回転検出器で検出することで、メガネ端面の幅中心
の軌跡が得られ、得られた軌跡を基に研削を行う。
The spectacle lens is brought into contact with the V-shaped groove, and the spectacle lens and the V-shaped groove are relatively rotated, so that a centering action is generated between the V-shaped groove and the spectacle lens, which is obtained between the V-shaped groove and the spectacle lens. By detecting the centering information with the displacement detector and detecting the rotational position with the rotation detector, the locus of the width center of the spectacle end face is obtained, and grinding is performed based on the obtained locus.

【0021】[0021]

【実施例】以下、図面を参照しつつ本発明の一実施例を
説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0022】図1、図2中、図3、図4中に示したもの
と同一のものには同符号を付し、その説明を省略する。
In FIGS. 1 and 2, the same parts as those shown in FIGS. 3 and 4 are designated by the same reference numerals, and the description thereof will be omitted.

【0023】砥石24,25,26,27の支持軸35
を軸受36を介して回転自在に支持し、前記支持軸35
には一方向クラッチ37を介してモータ38を結合す
る。前記一方向クラッチ37の許容回転方向は、レンズ
回転用モータ16により回転されるチャッキングシャフ
ト8,9の回転方向と同方向のみに回転する様になって
おり、前記チャッキングシャフト8,9と逆の方向には
前記支持軸35を拘束する様になっている。
Support shaft 35 for the grindstones 24, 25, 26, 27
Is rotatably supported via a bearing 36, and the support shaft 35
A motor 38 is coupled to this via a one-way clutch 37. The allowable rotation direction of the one-way clutch 37 is designed to rotate only in the same direction as the rotation direction of the chucking shafts 8 and 9 rotated by the lens rotation motor 16. The support shaft 35 is constrained in the opposite direction.

【0024】前記した様に、レンズ6を研削する場合
は、前記モータ38により一方向クラッチ37を介して
前記支持軸35、更に前記砥石24,25,26,27
を回転して行う。
As described above, when the lens 6 is ground, the support shaft 35 and the grindstones 24, 25, 26, 27 by the motor 38 via the one-way clutch 37.
To rotate.

【0025】本実施例の作動を説明する。The operation of this embodiment will be described.

【0026】レンズ6のチャッキング、荒摺用砥石24
によるレンズ6端面を平坦に研削する工程は、上記特公
昭58-43227号の自動玉摺機と同様であるので説明を省略
し、その後のレンズ6端面の幅中心の軌跡を求める工程
について説明する。
Grinding wheel 24 for chucking and roughing the lens 6
Since the step of grinding the end face of the lens 6 to be flat by the above is similar to that of the automatic ball shaving machine of Japanese Patent Publication No. 58-43227, the description thereof will be omitted, and the subsequent step of obtaining the locus of the width center of the end face of the lens 6 will be described. .

【0027】レンズ6の端面を前記中間砥石25のV溝
に嵌め、前記モータ38の駆動を停止して、前記レンズ
回転用モータ16により前記レンズ6のみを回転させ
る。
The end face of the lens 6 is fitted into the V groove of the intermediate grindstone 25, the driving of the motor 38 is stopped, and only the lens 6 is rotated by the lens rotating motor 16.

【0028】前記した様に、前記支持軸35は前記一方
向クラッチ37の作用によりレンズ6と同方向にのみ回
転するので、前記レンズ6を前記中間砥石25に当接し
た状態でレンズ6を回転させると、該中間砥石25は前
記一方向クラッチ37に拘束されて回転せず、前記レン
ズ6は中間砥石25の斜面28を滑りながら回転する。
As described above, since the support shaft 35 rotates only in the same direction as the lens 6 by the action of the one-way clutch 37, the lens 6 is rotated while the lens 6 is in contact with the intermediate grindstone 25. Then, the intermediate grindstone 25 is restrained by the one-way clutch 37 and does not rotate, and the lens 6 rotates while sliding on the slope 28 of the intermediate grindstone 25.

【0029】前記レンズ6の滑りを伴った中間砥石25
に対する相対回転で、図8に示すA矢印方向の動きが確
実に発生し、レンズ6端面の厚み中心と中間砥石25の
幅中心合わせが確実に行われつつ、前記レンズ6の回転
が行われる。
Intermediate grindstone 25 accompanied by sliding of the lens 6
The rotation of the lens 6 is performed while the movement in the direction of the arrow A shown in FIG. 8 is reliably generated, and the center of the thickness of the end face of the lens 6 and the center of the width of the intermediate grindstone 25 are reliably performed.

【0030】ここで、前記中間砥石25を完全に停止し
たのは、レンズ6を回転させた場合にレンズと砥石との
摩擦力により前記中間砥石25が追従して回転してしま
う。砥石がレンズに追従して回転すると、レンズが斜面
を滑り落ちないで逆に登上ってしまう現象が生じる。こ
の為、V溝の中心をレンズ6が倣うことができないから
である。
Here, the reason why the intermediate grindstone 25 is completely stopped is that when the lens 6 is rotated, the intermediate grindstone 25 follows and rotates due to the frictional force between the lens and the grindstone. When the grindstone follows the lens and rotates, the phenomenon that the lens does not slide down the slope and climbs in the opposite direction occurs. Therefore, the lens 6 cannot follow the center of the V groove.

【0031】而して、レンズ6はレンズ端面の水平方向
の位置変化に追従し、常にレンズ中心と中間砥石25と
の中心が合致する様水平方向に移動する。この時のヘッ
ドフレーム5の動きをレベルアーム4、ベルト23を介
し水平位置検出パルスエンコーダ20により検出し制御
装置30に入力し、又レンズ6の回転角変化をレンズ回
転角度検出パルスエンコーダ17により検出し制御装置
30に入力する。制御装置30は前2入力を基に、位置
決め時のレンズ中心と砥石中心との誤差、レンズ6を回
転させることによって起る端面の位置変化を、回転角を
パラメータとして記憶する。
Thus, the lens 6 follows the position change of the lens end surface in the horizontal direction, and always moves in the horizontal direction so that the center of the lens and the center of the intermediate grindstone 25 coincide with each other. The movement of the head frame 5 at this time is detected by the horizontal position detection pulse encoder 20 via the level arm 4 and the belt 23 and input to the control device 30, and the rotation angle change of the lens 6 is detected by the lens rotation angle detection pulse encoder 17. Input to the control device 30. The control device 30 stores the error between the center of the lens and the center of the grindstone at the time of positioning, and the position change of the end face caused by rotating the lens 6 based on the previous two inputs, using the rotation angle as a parameter.

【0032】制御装置30は、水平位置検出パルスエン
コーダ20、レンズ回転角度検出パルスエンコーダ17
等のデータよりレンズ6端面の厚み中心の軌跡を演算す
ることができ、次工程以後の研削制御に利用する。
The control device 30 includes a horizontal position detection pulse encoder 20 and a lens rotation angle detection pulse encoder 17.
A locus of the thickness center of the end surface of the lens 6 can be calculated from the data such as the above, and is used for the grinding control in the subsequent steps.

【0033】レンズ6端面の厚み中心の軌跡を求めた以
降の作動については前記した特公昭58-43227号の自動玉
摺機と同様であるので説明を省略する。
The operation after obtaining the locus of the thickness center of the end face of the lens 6 is the same as that of the automatic ball slicing machine of Japanese Patent Publication No. 58-43227, and therefore its explanation is omitted.

【0034】尚、上記実施例に於いてレンズ6端面の厚
み中心の軌跡を求める工程では、中間砥石25とレンズ
6との間で回転方向の摺動があり、レンズを傷付けない
為、レンズ6と中間砥石25との接触圧は小さい方が好
ましい。又、該工程は研削作動を伴わない為、中間砥石
25の代りにV溝を有し、更に高硬度で滑り抵抗の小さ
い芯合せ用円板を用いてもよく、或はベース1にV溝を
有する芯合せ用治具を設けてもよく、或はレンズ6端面
の厚み中心の軌跡を求める工程時に支持軸35を拘束す
ればよいので、前記クラッチ37に代え電磁クラッチブ
レーキを用い、該ブレーキによって前記支持軸35を拘
束する様にしてもよい等本発明の要旨を逸脱しない範囲
で種々変更を加え得ることは言う迄もない。
In the process of obtaining the locus of the thickness center of the end face of the lens 6 in the above embodiment, there is sliding in the rotational direction between the intermediate grindstone 25 and the lens 6 and the lens is not damaged. It is preferable that the contact pressure between and the intermediate grindstone 25 is small. Since this step does not involve grinding operation, a V groove may be used instead of the intermediate grindstone 25, and a centering disc having a high hardness and a small slip resistance may be used, or the V groove may be formed on the base 1. May be provided, or the support shaft 35 may be restrained in the step of obtaining the trajectory of the thickness center of the end face of the lens 6, so that an electromagnetic clutch brake is used instead of the clutch 37, and the brake is used. Needless to say, various modifications can be made without departing from the gist of the present invention, such as by restraining the support shaft 35.

【0035】[0035]

【発明の効果】以上述べた如く本発明によれば、プラス
チックレンズ等厚みの薄い而も材質の柔らかいレンズで
も正確に且確実にレンズの端面の厚み中心を測定し、レ
ンズ端面に所望のヤゲンを形成することができる。
As described above, according to the present invention, the center of thickness of the end face of a lens can be accurately and reliably measured even with a thin lens such as a plastic lens and a soft material, and a desired bevel is formed on the lens end face. Can be formed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す主要部の平面図であ
る。
FIG. 1 is a plan view of a main part showing an embodiment of the present invention.

【図2】同前正面図である。FIG. 2 is a front view of the same.

【図3】従来例の平面図である。FIG. 3 is a plan view of a conventional example.

【図4】該従来例の正面図である。FIG. 4 is a front view of the conventional example.

【図5】該従来例の側面図である。FIG. 5 is a side view of the conventional example.

【図6】チャッキングヘッド部の詳細図である。FIG. 6 is a detailed view of a chucking head portion.

【図7】(イ)(ロ)(ハ)(ニ)は砥石研削面とレン
ズ端面仕上がり形状を示す説明図である。
7 (a), (b), (c), and (d) are explanatory views showing a finished shape of a grindstone grinding surface and a lens end surface.

【図8】中間砥石によるレンズ位置合せ原理を示す説明
図である。
FIG. 8 is an explanatory diagram showing the principle of lens alignment using an intermediate grindstone.

【符号の説明】[Explanation of symbols]

5 ヘッドフレーム 6 レンズ 10 倣型 17 レンズ回転角度検出パルスエンコーダ 20 水平位置検出パルスエンコーダ 24 荒摺用砥石 25 中間砥石 26 中間砥石 27 仕上砥石 28 傾斜面 29 傾斜面 30 制御装置 5 Head Frame 6 Lens 10 Copy Type 17 Lens Rotation Angle Detection Pulse Encoder 20 Horizontal Position Detection Pulse Encoder 24 Roughing Grinding Stone 25 Intermediate Grinding Stone 26 Intermediate Grinding Stone 27 Finishing Grinding Stone 28 Sloping Surface 29 Sloping Surface 30 Control Device

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 レンズを傾動自在なヘッドフレームで回
転可能に支持し、レンズを回転させつつ砥石に当接さ
せ、レンズ外形を所定の形状に研削する様にした自動玉
摺機に於いて、メガネレンズの板厚より更に広がる傾斜
面を有するV溝と、該V溝に前記メガネレンズの端面を
当接させ、該V溝に対してメガネレンズの端面を相対回
転可能とし、この相対回転により生ずるV溝に対して直
角方向の変位を検出する変位検出器と、前記レンズの回
転を検出する回転検出器と、前記変位検出器と回転検出
器の検出結果を基にメガネレンズの端面幅中心を求める
制御装置とを具備することを特徴とする自動玉摺機。
1. An automatic ball slicing machine in which a lens is rotatably supported by a tiltable head frame and is brought into contact with a grindstone while rotating the lens to grind the lens outer shape into a predetermined shape. A V groove having an inclined surface that further expands than the plate thickness of the spectacle lens, and an end surface of the spectacle lens are brought into contact with the V groove so that the end surface of the spectacle lens can be relatively rotated with respect to the V groove. A displacement detector that detects a displacement in a direction perpendicular to the generated V groove, a rotation detector that detects the rotation of the lens, and a center of the end face width of the spectacle lens based on the detection results of the displacement detector and the rotation detector. An automatic ball shaving machine, comprising:
【請求項2】 制御装置が求めたメガネレンズの端面幅
中心を基に、メガネレンズ研削時に前記メガネレンズを
厚み方向に強制移動させる請求項1の自動玉摺機。
2. The automatic scouring machine according to claim 1, wherein the spectacle lens is forcibly moved in the thickness direction when the spectacle lens is ground, based on the center of the end face width of the spectacle lens determined by the control device.
【請求項3】 V溝が砥石の研削面に形成され、砥石の
回転軸に該回転軸を少なくともメガネレンズの回転方向
とは逆の方向に、少なくともメガネレンズの端面幅中心
を求める工程では拘束する拘束手段を設けた請求項1の
自動玉摺機。
3. A V-groove is formed on the grinding surface of the grindstone, and the rotation axis of the grindstone is constrained in the step of determining at least the end face width center of the spectacle lens in a direction opposite to the rotation direction of the spectacle lens. The automatic ball shaving machine according to claim 1, further comprising:
【請求項4】 拘束手段が一方向クラッチである請求項
3の自動玉摺機。
4. The automatic ball shaving machine according to claim 3, wherein the restraint means is a one-way clutch.
JP11360693A 1993-04-16 1993-04-16 Automatic lens edger Pending JPH06297309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11360693A JPH06297309A (en) 1993-04-16 1993-04-16 Automatic lens edger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11360693A JPH06297309A (en) 1993-04-16 1993-04-16 Automatic lens edger

Publications (1)

Publication Number Publication Date
JPH06297309A true JPH06297309A (en) 1994-10-25

Family

ID=14616483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11360693A Pending JPH06297309A (en) 1993-04-16 1993-04-16 Automatic lens edger

Country Status (1)

Country Link
JP (1) JPH06297309A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014063197A (en) * 2007-02-13 2014-04-10 Essilor International (Compagnie D'optique Generale D'optique) Machine forming spectacle glass lens provided with rotatable tool carrier mounted with several working tools
CN109702583A (en) * 2019-02-19 2019-05-03 文华学院 Optical lens processing unit (plant)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5611456A (en) * 1979-07-09 1981-02-04 Dainippon Printing Co Ltd Preparation of screen process original plate
JPS56114656A (en) * 1980-02-13 1981-09-09 Kosei Takubo Automatic ball grinder
JPS629858A (en) * 1985-03-29 1987-01-17 Tokyo Optical Co Ltd Lens grinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5611456A (en) * 1979-07-09 1981-02-04 Dainippon Printing Co Ltd Preparation of screen process original plate
JPS56114656A (en) * 1980-02-13 1981-09-09 Kosei Takubo Automatic ball grinder
JPS629858A (en) * 1985-03-29 1987-01-17 Tokyo Optical Co Ltd Lens grinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014063197A (en) * 2007-02-13 2014-04-10 Essilor International (Compagnie D'optique Generale D'optique) Machine forming spectacle glass lens provided with rotatable tool carrier mounted with several working tools
CN109702583A (en) * 2019-02-19 2019-05-03 文华学院 Optical lens processing unit (plant)

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