JPH03161260A - Lens centering machine - Google Patents

Lens centering machine

Info

Publication number
JPH03161260A
JPH03161260A JP29755389A JP29755389A JPH03161260A JP H03161260 A JPH03161260 A JP H03161260A JP 29755389 A JP29755389 A JP 29755389A JP 29755389 A JP29755389 A JP 29755389A JP H03161260 A JPH03161260 A JP H03161260A
Authority
JP
Japan
Prior art keywords
lens
movable shaft
bell
detecting
thickness
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
JP29755389A
Other languages
Japanese (ja)
Inventor
Koichi Matsushita
松下 光一
Kazuo Watanabe
和雄 渡辺
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP29755389A priority Critical patent/JPH03161260A/en
Publication of JPH03161260A publication Critical patent/JPH03161260A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To automatize discriminant work of thickness of a lens by providing a discriminant means to discriminate the thickness of the lens by comparing a detected value and a reference value after detecting the position of a movable shaft by a detection means at the time when the lens to be processed is sandwiched by a bell clamp. CONSTITUTION:At the time when centering of a lens 1 is carried out with a bell clamp, the position of a movable shaft 7 in the shaft direction when the lens 1 is sandwiched with the bell clamp is detected by a detection means 11, and its detected value and another detected value obtained in the same way against a standard prototype previously set by a setting means 13 are compared with each other by a discriminant means 14. In this way, quality of thickness of the lens 1 is automatically discriminated.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、加工すべきレンズの肉厚の判別機能を有する
レンズ芯取機に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lens centering machine having a function of determining the wall thickness of a lens to be processed.

[従来の技術] 従来、加工すべきレンズの肉厚を測定する機能を有する
レンズ芯取機としては、実開昭59−55658号公報
に記載されているレンズ芯取機がある。
[Prior Art] Conventionally, as a lens centering machine having a function of measuring the wall thickness of a lens to be processed, there is a lens centering machine described in Japanese Utility Model Application Publication No. 59-55658.

このレンズ芯取機は、ベルクランプの固定軸および可動
軸のいずれか一方に直線変位測定器(たとえばダイヤル
ケージ)を測定子の変位軸をベルホルダの軸と平行にし
て設けるとともに、他方に該直線変位測定器の測定子の
先端に対向するストツバを設けることにより、芯取り工
程のレンズクランプ時にレンズの肉厚を測定しうるよう
にしたものである。
This lens centering machine is equipped with a linear displacement measuring device (for example, a dial cage) on either the fixed axis or the movable axis of the bell clamp, with the displacement axis of the probe parallel to the axis of the bell holder, and on the other side, By providing a stopper opposite to the tip of the probe of the displacement measuring instrument, the thickness of the lens can be measured when clamping the lens in the centering process.

[発明が解決しようとする課E] 上述した実開昭59−55658号公報に記載ざれてい
る従来のレンズ芯取機は、直線変位測定器を設けて加工
すべきレンズの肉厚を測定しうるようにしたものである
ので、該レンズが肉厚に関して良品であるか不良品であ
るかの判断は、作業者が該直線変位測定器の目盛を該レ
ンズ毎に読み取って行なうため、作業効率が悪いという
欠点がある。
[Problem E to be solved by the invention] The conventional lens centering machine described in the above-mentioned Japanese Utility Model Application Publication No. 59-55658 is equipped with a linear displacement measuring device to measure the wall thickness of the lens to be processed. The operator can judge whether the lens is good or defective in terms of wall thickness by reading the scale of the linear displacement measuring device for each lens, which improves work efficiency. The disadvantage is that it is bad.

本発明の目的は、加工ずへきレンズの肉厚の良否を自動
的に判別することができるレンズ芯取機を提供すること
にある。
An object of the present invention is to provide a lens centering machine that can automatically determine whether the thickness of an unprocessed lens is good or bad.

[課題を解決するための手段] 本発明のレンズ芯取機は、ベルクランプの可動軸の軸方
向の位置の検出手段と、前記ベルクランプにより基準原
器を挟持したときの可動軸の位置を前記検出手段により
検出し、該検出値を基準値として設定するための設定手
段と、前記検出手段により加工すべきレンズを前記ベル
クランプに挟持したときの可動軸の位置を検出し、該検
出値と前記基準値とを比較して前記レンズの肉厚を判別
する判別手段とから構成されることを特徴とする。
[Means for Solving the Problems] The lens centering machine of the present invention includes means for detecting the axial position of the movable shaft of the bell clamp, and a means for detecting the position of the movable shaft when the reference standard is clamped by the bell clamp. a setting means for detecting by the detecting means and setting the detected value as a reference value; and a setting means for detecting the position of the movable axis when the lens to be processed is held between the bell clamps by the detecting means; and a determination means for determining the wall thickness of the lens by comparing the reference value and the reference value.

また、検出手段は可動軸側に取り付けることもできる。Further, the detection means can also be attached to the movable shaft side.

[作用] 本発明のレンズ芯取機は、ベルクランプで加工すべきレ
ンズの芯出しを行なう際に、該ベルクランプで該レンズ
を挟持したときの可動軸の軸方向の位置を検出手段で検
出し、該検出値と予め設定手段で設定された基準原器に
対して同様に求めた検出値とを判別手段で比較すること
により、前記レンズの肉厚の良否を自動判別するので、
この判別作業の効率を向上させることができる。
[Function] When centering a lens to be processed using a bell clamp, the lens centering machine of the present invention uses a detection means to detect the axial position of the movable shaft when the lens is held between the bell clamps. However, the determination means automatically determines whether the thickness of the lens is good or bad by comparing the detected value with a detected value similarly obtained with respect to a reference standard set in advance by the setting means.
The efficiency of this discrimination work can be improved.

また、検出手段を可動軸側に取り付けることにより、可
動軸の軸方向の位置を正確に検出することができる。
Furthermore, by attaching the detection means to the movable shaft side, the axial position of the movable shaft can be accurately detected.

[実施例コ 次に、本発明の実施例について図面を参照して説明する
[Embodiments] Next, embodiments of the present invention will be described with reference to the drawings.

第1図は本発明のレンズ芯取機の一実施例を示す要部概
略説明図である。
FIG. 1 is a schematic explanatory view of the main parts of an embodiment of the lens centering machine of the present invention.

ベルクランプの可動軸7は、図示しない機粋に一体的に
設けられたスリーブ8に複数の流体軸受9a,9bを介
して回転自在に、また軸方向に慴動自在に支持されてい
る。一方、前記可動軸7の軸心の延長線上に、図示しな
い機粋に一体的に設けられたスリーブ5に複数の流体軸
受6を介して回転自在に支持された固定軸4が配設され
ており、その可動軸7側の先端部にはベルホルダ2が着
脱自在に取り付けられている。
The movable shaft 7 of the bell clamp is rotatably and axially supported by a sleeve 8 (not shown) which is strategically provided integrally with the sleeve 8 via a plurality of fluid bearings 9a, 9b. On the other hand, on the extension of the axis of the movable shaft 7, a fixed shaft 4 rotatably supported via a plurality of fluid bearings 6 is disposed on a sleeve 5 (not shown) which is strategically provided integrally with the sleeve 5. A bell holder 2 is detachably attached to the tip end on the movable shaft 7 side.

前記可動軸7の固定@4側の先端部にはベルホルダ3が
着脱自在に取り付けられており,反ベルホルダ3側の端
部には連結部材7aかスラスト軸受を介して回転自在で
あるが軸方向には一体的に支持されている。
A bell holder 3 is removably attached to the tip of the movable shaft 7 on the fixed @ 4 side, and the end on the side opposite to the bell holder 3 is rotatable via a connecting member 7a or a thrust bearing, but it is rotatable in the axial direction. is integrally supported.

前記連結部材7aは、図示しない支持枠に支持された流
体圧シリンダ10のピストンロッドloaに連結されて
おり、流体圧シリンダ10を起動することにより、前記
ピストンロンドlogを介して前記0I9)J軸7を軸
方向に摺動させる。符号7bは可動軸7に一体的に設け
られた歯車であって、図示しない駆動系の歯車と軸方向
に摺動自在に噛合されており、可動INI7が軸方向に
移動しても常に回転力が伝動されるように構成されてい
る。
The connecting member 7a is connected to a piston rod loa of a fluid pressure cylinder 10 supported by a support frame (not shown), and by starting the fluid pressure cylinder 10, the 0I9) J axis is connected via the piston rondo log. 7 in the axial direction. Reference numeral 7b denotes a gear integrally provided on the movable shaft 7, and is meshed with a gear of a drive system (not shown) so as to be slidable in the axial direction, so that even if the movable INI 7 moves in the axial direction, rotational force is always applied. is configured to be transmitted.

前記連結部材7aには、可動軸7の釉方向の位置の検出
手段として電気マイクロメータIIが設けられている。
The connecting member 7a is provided with an electric micrometer II as means for detecting the position of the movable shaft 7 in the glaze direction.

該電気マイクロメータ11には、その出力信号を増幅す
る増幅器l2と、前記ベルクランプにより基準原器を挟
持したときの可動軸7の位置を前記電気マイクロメータ
1lにより検出し、該検出値を増幅器12で増幅した値
を基準値として設定するための設定手段である設定器1
3と、前記電気マイクロメータl1により加工すべきレ
ンズ1を前記ベルクランプに挟持したときの可動軸7の
位置を検出し、該検出値を増幅器12で増幅した値と前
記基準値とを比較して前記レンズ1の肉厚を判別するた
めの判別手段である比較器14と、該比較器l4による
判別結果を表示する表示装置15とか接続される。
The electric micrometer 11 includes an amplifier l2 that amplifies its output signal, and the electric micrometer 1l detects the position of the movable shaft 7 when the reference standard is held between the bell clamps, and the detected value is sent to the amplifier l2. A setting device 1 is a setting means for setting the value amplified in step 12 as a reference value.
3, the position of the movable shaft 7 when the lens 1 to be processed is held between the bell clamps is detected by the electric micrometer l1, and the detected value is amplified by the amplifier 12, and the value is compared with the reference value. A comparator 14, which is a determining means for determining the thickness of the lens 1, and a display device 15, which displays the determination result by the comparator 14, are connected.

次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.

加工すべきレンズ1の肉厚の判別に用いる前記基準値を
得るために、基準原器を固定軸4のベルホルダ2に吸着
させ、流体圧シリンタ10を起動して可動軸7を固定軸
4方向に摺動させることにより、2つのベルホルダ2.
3で基準原器を挟持して基準原器の芯出しを行なう。電
気マイクロメータ11はこのときの可動軸7の軸方向の
位置を検出し、該検出値を増幅器12に出力する。設定
器13は増幅器12から該増幅された検出値を受け取り
、基準値として設定する。
In order to obtain the reference value used for determining the wall thickness of the lens 1 to be processed, the reference prototype is adsorbed to the bell holder 2 of the fixed shaft 4, the fluid pressure cylinder 10 is started, and the movable shaft 7 is moved in the direction of the fixed shaft 4. By sliding the two bell holders 2.
At step 3, the reference prototype is held and centered. The electric micrometer 11 detects the axial position of the movable shaft 7 at this time and outputs the detected value to the amplifier 12. The setter 13 receives the amplified detection value from the amplifier 12 and sets it as a reference value.

次に、基準原器をベルホルダ2,3から取りはずし、加
工すべきレンズ1を固定軸4のベルホルダ2に吸着させ
、上記動作と同様に該レンズ1の芯出しを行ない、電気
マイクロメータ1lでこのときの可動@7の軸方向の位
置を検出する。比較器14は、増幅器12から増幅され
た該検出値を、また設定器l3から前記基準値を受け取
り、両者の比較を行なう。比較の結果、該検出値が所定
の許容範囲内の値である場合すなわち前記レンズ1の肉
厚が所定の大きさである場合には、該レンズ1が良品で
ある旨の表示が比較器l4からの出力によって表示装置
15に表示される。一方、それ以外の場合には、前記レ
ンズ1の肉厚が所定の大きさでないため、該レンズ1が
不良品である旨の表示が比較器I4からの出力によって
表示装置15に表示ざれる。
Next, the reference standard is removed from the bell holders 2 and 3, the lens 1 to be processed is attracted to the bell holder 2 of the fixed shaft 4, the lens 1 is centered in the same manner as above, and the lens 1 is centered using the electric micrometer 1l. Detect the axial position of the movable @7 at the time. The comparator 14 receives the amplified detection value from the amplifier 12 and the reference value from the setting device 13, and compares the two. As a result of the comparison, if the detected value is within a predetermined tolerance range, that is, if the thickness of the lens 1 is a predetermined size, the comparator l4 displays an indication that the lens 1 is a good product. The output is displayed on the display device 15. On the other hand, in other cases, since the thickness of the lens 1 is not a predetermined size, a message indicating that the lens 1 is defective is displayed on the display device 15 by the output from the comparator I4.

したがって、作業者は表示装置l5の表示を監視するこ
とにより、加工すべきレンズ1が肉厚に関して良品か不
良品か直ちに判別することができる。また、該レンズ1
が肉厚に関して良品である場合には該レンズの外周の研
削加工を公知の方法により引き続き行ない、一方、該レ
ンズ1が肉厚に関して不良品である場合には、該レンズ
1をベルホルダ2.3から取りはずし、次の加工すべき
レンズについて同様の動作を繰り返すことにより、レン
ズの外周の研削加工は肉厚に関して良品であるレンズに
関してのみ行なえるため、レンズ加工の作業効率の向上
が図れる。
Therefore, by monitoring the display on the display device 15, the operator can immediately determine whether the lens 1 to be processed is a good product or a defective product in terms of wall thickness. In addition, the lens 1
If the lens 1 is good in terms of wall thickness, the outer periphery of the lens is subsequently ground by a known method, while if the lens 1 is defective in terms of wall thickness, the lens 1 is placed in a bell holder 2.3. By removing the lens from the lens and repeating the same operation for the next lens to be processed, grinding of the outer periphery of the lens can be performed only on lenses that are of good quality in terms of wall thickness, thereby improving the work efficiency of lens processing.

第1図に示した実施例では、ベルクランプの可動軸7の
軸方向の位置の検出手段として電気マイクロメータ11
を用いたが、リニアエンコーダ等を用いてもよい。また
、該検出手段は、特に連結部材7aに取り付けられる必
要はなく、光学センサー等を用いて可動@7と非接触に
その位置を検出してもよい。
In the embodiment shown in FIG. 1, an electric micrometer 11 is used as means for detecting the axial position of the movable shaft 7 of the bell clamp.
was used, but a linear encoder or the like may also be used. Further, the detection means does not need to be particularly attached to the connecting member 7a, and may detect the position of the movable @7 without contacting it using an optical sensor or the like.

また、本実施例では、電気マイクロメータ11の出力信
号を比較器14等でそのままアナログ処理したが、該出
力信号をA/D変換器でデジタル信号に変換して同様の
処理を施してもよい。
Furthermore, in this embodiment, the output signal of the electric micrometer 11 is directly analog-processed using the comparator 14 or the like, but the output signal may be converted into a digital signal using an A/D converter and subjected to similar processing. .

[発明の効果コ 本発明は上記のとおり構成されているので、以下に記載
するような効果を奏する。
[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

レンズ芯取機でレンズの肉厚判別作業を自動で行なえる
ため、該判別作業の効率を大幅に向モすることができる
Since the lens centering machine can automatically perform the work of determining the thickness of the lens, the efficiency of the determination work can be greatly improved.

また、ベルクランプの可動軸の軸方向の位置の検出手段
を可動軸側に取り付けるようにすると、その位置を正確
に検出することができる。
Moreover, if the means for detecting the axial position of the movable shaft of the bell clamp is attached to the movable shaft side, the position can be accurately detected.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のレンズ芯取機の一実施例を示す要部概
略説明図である。 1・・・レンズ、    2.3−・・ベルホルダ、4
・・・固定軸、    5.8・・・スリーブ、6.9
a,9b−−−流体軸受、 7・・・可動軸、   7a・・・連結部材、7b・・
・歯車、    IO・・・流体圧シリンダ、10a・
・・ピストンロッド、 11・・・電気マイクロメータ、 12・・・増幅器、 14・・・比較器、 13・・・設定器、 l5・・・表示装置。
FIG. 1 is a schematic explanatory view of the main parts of an embodiment of the lens centering machine of the present invention. 1...Lens, 2.3-...Bell holder, 4
... Fixed shaft, 5.8 ... Sleeve, 6.9
a, 9b---Fluid bearing, 7... Movable shaft, 7a... Connection member, 7b...
・Gear, IO...Fluid pressure cylinder, 10a・
...Piston rod, 11...Electric micrometer, 12...Amplifier, 14...Comparator, 13...Setter, l5...Display device.

Claims (1)

【特許請求の範囲】 1)ベルクランプの可動軸の軸方向の位置の検出手段と
、前記ベルクランプにより基準原器を挟持したときの可
動軸の位置を前記検出手段により検出し、該検出値を基
準値として設定するための設定手段と、前記検出手段に
より加工すべきレンズを前記ベルクランプに挟持したと
きの可動軸の位置を検出し、該検出値と前記基準値とを
比較して前記レンズの肉厚を判別する判別手段とから構
成されることを特徴とするレンズ芯取機。 2)検出手段は可動軸側に取り付けられていることを特
徴とする請求項第1項記載のレンズ芯取機。
[Scope of Claims] 1) Detecting means for detecting the axial position of the movable shaft of the bell clamp, and detecting the position of the movable shaft when the reference standard is held between the bell clamps, and detecting the detected value. a setting means for setting as a reference value, and a position of the movable axis when the lens to be processed is held between the bell clamps is detected by the detection means, and the detected value and the reference value are compared to determine the position of the movable axis. A lens centering machine comprising a determining means for determining the wall thickness of a lens. 2) The lens centering machine according to claim 1, wherein the detection means is attached to the movable shaft side.
JP29755389A 1989-11-17 1989-11-17 Lens centering machine Pending JPH03161260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29755389A JPH03161260A (en) 1989-11-17 1989-11-17 Lens centering machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29755389A JPH03161260A (en) 1989-11-17 1989-11-17 Lens centering machine

Publications (1)

Publication Number Publication Date
JPH03161260A true JPH03161260A (en) 1991-07-11

Family

ID=17848039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29755389A Pending JPH03161260A (en) 1989-11-17 1989-11-17 Lens centering machine

Country Status (1)

Country Link
JP (1) JPH03161260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5498200A (en) * 1994-08-12 1996-03-12 Wernicke & Co. Gmbh Device for parallex-free centering of a blank for a glass lens for spectacles and for providing markings and/or attaching a holder before inserting the blank into a grinding machine for blanks for glass lenses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5498200A (en) * 1994-08-12 1996-03-12 Wernicke & Co. Gmbh Device for parallex-free centering of a blank for a glass lens for spectacles and for providing markings and/or attaching a holder before inserting the blank into a grinding machine for blanks for glass lenses

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