JPS63175722A - Rotary disk for reflection type rotary encoder - Google Patents
Rotary disk for reflection type rotary encoderInfo
- Publication number
- JPS63175722A JPS63175722A JP774787A JP774787A JPS63175722A JP S63175722 A JPS63175722 A JP S63175722A JP 774787 A JP774787 A JP 774787A JP 774787 A JP774787 A JP 774787A JP S63175722 A JPS63175722 A JP S63175722A
- Authority
- JP
- Japan
- Prior art keywords
- rotary
- reflective
- disk
- rotary encoder
- plate
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000007747 plating Methods 0.000 claims abstract description 3
- 238000007740 vapor deposition Methods 0.000 claims abstract 2
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 239000010948 rhodium Substances 0.000 claims description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 2
- 239000011521 glass Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は反射型ロータリエンコーダの回転板に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a rotating plate for a reflective rotary encoder.
（従来の技術）
従来この種の回転板は、鏡面ガラス板上に高反射率を有
する金属を蒸着し、この蒸着面にフォトエツチング等の
手法を用いて反射部例えば、細帯状体を放射状に配列し
た反射部を形成し、反射部具外の部分に印刷等により無
反射部を形成する。(Prior art) Conventionally, this type of rotary plate is made by depositing a metal with high reflectance on a mirror glass plate, and forming reflective parts, e.g. An array of reflective parts is formed, and a non-reflective part is formed outside the reflective part by printing or the like.
その後放射状反射部の中心にエンコーダの回転軸に取り
つけるための孔部を設けたり、回転板の円板外周部に形
成し、この様にして出来上った回転板をエンコーダの回
転軸に嵌合固定していた。この種の回転板は、金属を蒸
着した面を反射部となし、黒色印刷した部分を無反射部
となしたガラス体よりなるものである。After that, a hole for attaching to the rotary shaft of the encoder is provided at the center of the radial reflection part, or a hole is formed on the outer circumference of the disc of the rotary plate, and the rotary plate thus completed is fitted to the rotary shaft of the encoder. It was fixed. This type of rotary plate is made of a glass body with a metal-deposited surface serving as a reflective portion and a black printed portion serving as a non-reflective portion.
（発明の解決しようとする問題点）
前記従来例の回転板は、ガラス体を基板としてこれに加
工を施すことにより形成されたものであるから、これに
伴なって次に列挙する様な問題点が発生した。(Problems to be Solved by the Invention) Since the rotary plate of the conventional example is formed by processing a glass body as a substrate, there are problems as listed below. A point occurred.
（ａ）ガラス板に放射状に配設した細帯状反射部を形成
しているのでこの反射部の中心にエンコーダの回転軸に
嵌合するための孔を加工する際、反射部の正確な中心位
置に嵌合孔を設けること及びガラス板を切断加工して回
転板の円板外周を形成すること等は極めて高度の技術を
必要とすると共に所望のガラス体回転板を得るためには
煩瑣な工程をへなければならない。(a) Since the glass plate has thin strip-shaped reflective parts arranged radially, it is necessary to accurately locate the center of the reflective part when drilling a hole in the center of the reflective part to fit the rotary shaft of the encoder. Providing fitting holes in the glass plate and cutting the glass plate to form the outer circumference of the rotary plate require extremely advanced technology, and are complicated processes in order to obtain the desired glass body rotary plate. I have to go to
（ｂ）エンコーダの回転軸にガラス体回転板を嵌挿固着
した場合に、その強度を維持するために、ガラス体を適
宜な厚さに形成する。従ってガラス体回転板は相当な重
量を有するものとなり、回転軸と共に回転中における慣
性モーメントが比較的大きくなる。(b) In order to maintain the strength of the glass body rotating plate when it is fitted and fixed to the rotary shaft of the encoder, the glass body is formed to have an appropriate thickness. Therefore, the glass rotating plate has a considerable weight, and the moment of inertia during rotation together with the rotating shaft becomes relatively large.
（Ｃ）回転板にガラス体を採用しているので、高速回転
時に不要の振動、衝撃が発生するとガラス体が破損した
りして危険である。(C) Since a glass body is used for the rotating plate, if unnecessary vibrations or shocks occur during high-speed rotation, the glass body may be damaged, which is dangerous.
本発明は前述の問題点を克服することを目的とするもの
で以下その問題点を解決するための手段及び作用を開示
する。The present invention aims to overcome the above-mentioned problems, and hereinafter, means and operations for solving the problems will be disclosed.
（問題点を解決するための手段、作用）本発明の反射型
ロータリエンコーダの回転板は金属円板よりなるもので
ある。すなわち、ロータリエンコーダの回転板は、反射
率の高い薄型金属円板の中心に回転軸に嵌合するための
孔部を設け、この孔部を中心として放射状に透過スリッ
ト群を配設した構成を有する。(Means and operations for solving the problems) The rotary plate of the reflective rotary encoder of the present invention is made of a metal disc. In other words, the rotating plate of the rotary encoder has a structure in which a hole for fitting the rotating shaft is provided at the center of a thin metal disk with high reflectivity, and a group of transmission slits are arranged radially around this hole. have
この回転板をその孔部により回転軸に嵌合固定し、この
軸と共に所定方向へ回転駆動すると、発光素子より先導
波路例えば往路光ファイバ等を介して伝送されたレーザ
ー光線等は回転板の反射面で反射すると同時にその一部
は前記透過スリット群を通過する。反射したレーザ光線
等は復路光ファイバをへて受光素子へ導びかれて受光素
子に到達し、光電変換手段により光電変換が実施される
。When this rotary plate is fitted and fixed to a rotary shaft through its hole and rotated in a predetermined direction together with this shaft, laser beams, etc. transmitted from the light emitting element via a leading wave path, such as an outgoing optical fiber, etc., are transmitted to the reflective surface of the rotary plate. At the same time, a part of the reflected light passes through the transmission slit group. The reflected laser beam or the like is guided to the light receiving element through the return path optical fiber, reaches the light receiving element, and is subjected to photoelectric conversion by the photoelectric conversion means.
又一方透過スリット群を通過した光は、金属円板の裏側
に配設した所定角度例えば約４５°の反射角を有する部
材（図示せず）を介して側方へ導かれるか又はこの部材
に吸収される。金属板の裏側にある各種部材は光を吸収
するように例えば黒色に塗装されている。On the other hand, the light passing through the group of transmission slits is guided to the side through a member (not shown) having a reflection angle of a predetermined angle, for example, about 45 degrees, which is arranged on the back side of the metal disk, or is guided to the side by this member. Absorbed. Various components on the back side of the metal plate are painted, for example, black to absorb light.
（実施例）
以下添付図面を参照して本発明に係る実施例を説明する
。本発明の回転板は、薄形金属円板で形成され、フォト
リソグラフィ、又はフォトエレクトロフォーミング等の
手法を用いて製作されたものであるが、その製法につい
ては説明を省略する。(Examples) Examples according to the present invention will be described below with reference to the accompanying drawings. The rotary plate of the present invention is formed of a thin metal disc and is manufactured using a technique such as photolithography or photoelectroforming, but a description of the manufacturing method will be omitted.
第１図は本発明に係る回転板に回転軸を取りつけた平面
図である。FIG. 1 is a plan view of a rotary plate according to the present invention with a rotary shaft attached thereto.
薄型金属円板１の中心部に回転軸３を嵌合固定するため
の孔部１ａを設け、この孔部１ａを中心として放射状に
透過スリット群１ｂを穿設する。A hole 1a for fitting and fixing the rotating shaft 3 is provided in the center of the thin metal disk 1, and a group of transmission slits 1b are bored radially around the hole 1a.
前記円板の上面には反射率の高い物質をメッキ又繊蒸着
により耐着し、この面を反射部ＩＣに構成する。本発明
に係る反射型ロータリエンコーダの回転板は、光の透過
可能な無反射透過スリット群１ｂと光の反射可能な反射
部ＩＣとを具えた円板と、この円板を回転軸に取りつけ
るための孔部１ａとよりなる。A material with high reflectance is adhered to the upper surface of the disk by plating or fiber deposition, and this surface constitutes the reflective part IC. The rotary plate of the reflective rotary encoder according to the present invention includes a disk including a group of non-reflective transmission slits 1b through which light can pass and a reflection section IC through which light can be reflected, and a mechanism for attaching this disk to a rotating shaft. It consists of a hole 1a.
尚反射率の高い物質としてロジウム、金又はアルミニウ
ム等を使用し、これらの物質を反射部にメッキ又は蒸着
する。Note that rhodium, gold, aluminum, or the like is used as a material with high reflectance, and these materials are plated or vapor-deposited on the reflective portion.
第２図は第１図に図示の回転板を回転軸３に装着した断
面図である。回転板はフォトエレクトロフォーミング等
により製造した薄型金属円板１よりなるので、回転軸３
に動かないように固定するために鍔状支持部２を用いる
。鍔状支持部２は金属円板１を支持するための段部２ａ
を具えている。金属円板１は鍔状支持部２を介して回転
軸３に嵌挿固着してなり、従って回転軸３の回転に伴っ
て回転する際に、金属円板１のラジアル方向の変位が防
止され、回転精度の向上を計ることが出来る。その結果
金属円板１の放射状透過スリット群１ｂが金属円板１と
共に回転する際のラジアル方向への変位も防止され、ス
リット群１ｂは予め決められた同−軌跡上を円滑に８！
ｌ］する。FIG. 2 is a sectional view of the rotating plate shown in FIG. 1 mounted on the rotating shaft 3. FIG. Since the rotating plate is made of a thin metal disc 1 manufactured by photoelectroforming or the like, the rotating shaft 3
A flange-like support part 2 is used to fix it so that it does not move. The collar-shaped support part 2 is a step part 2a for supporting the metal disk 1.
It is equipped with The metal disk 1 is fitted and fixed to the rotating shaft 3 via the collar-shaped support portion 2, and therefore, when rotating with the rotation of the rotating shaft 3, displacement of the metal disk 1 in the radial direction is prevented. , it is possible to measure the improvement of rotation accuracy. As a result, the radial transmission slit group 1b of the metal disk 1 is prevented from being displaced in the radial direction when rotating together with the metal disk 1, and the slit group 1b smoothly moves on the same predetermined trajectory.
l] do.
（効 果）
本発明は、フォトエレクトロフォーミング等の手法で、
外周、回転軸嵌合孔、透過スリット群を同心的に同時形
成した金属円板を用いて回転板を構成しているから、従
来例のガラス体を使用する回転板について欠陥と考えら
れる加工技術上の問題点や慣性、破損等に関する欠陥を
克服するものであり、又無反射部として透過スリット群
を、又反射部として高反射率の金属円板を採用している
から、光の透過率と反射率とにすぐれ、反射と無反射と
の光量の差を大きくとることができ、回転板としての性
能向上に役立つ。(Effects) The present invention uses methods such as photoelectroforming,
Since the rotating plate is constructed using a metal disk on which the outer periphery, rotating shaft fitting hole, and transmission slit group are simultaneously formed concentrically, this processing technique is considered to be defective in conventional rotating plates that use glass bodies. It overcomes the above problems and defects related to inertia, breakage, etc. Also, it uses a group of transmission slits as the non-reflective part and a metal disc with high reflectance as the reflective part, so the light transmittance is low. It has excellent reflectivity and can make a large difference in the amount of light between reflective and non-reflective, which helps improve performance as a rotating plate.
更に回転軸に回転板を取りつけるために鍔状支持部を採
用しているから、回転時におけるラジアル方向への変位
を防止する等の効果がある。Furthermore, since a flange-like support portion is employed to attach the rotary plate to the rotary shaft, it is effective in preventing displacement in the radial direction during rotation.
第１図は本発明に係る回転板の一実施例の平面図。第２
図は第１図のＡ−Ａ’の線に沿った断面図。
１は金属円板、１ａは孔部、１ｂは透過スリット群、１
ｃは反射部、２は鍔状支持部、２ａは段部、３は回転軸
出 願 人 株式会社デルファイ代理人 弁理士
小 林 榮図面の浄書（内容に変更なし）
第 １ 図
２ｄ・・・峻紹
手続補正書（自発）
昭和６２年 ４月７０日
−＋−
１、事件の表示
昭和６２年 特 許 願 第００７７４７号２、発明
の名称 反射型ロータリエンコーダの回転板３、補正
をする者
事件との関係 特許出願人
４、代理人 〒１６０
氏名 （７５１０）弁理士小林 榮−７２，゛１電話
３７４−５８９０FIG. 1 is a plan view of an embodiment of a rotating plate according to the present invention. Second
The figure is a sectional view taken along the line AA' in FIG. 1 is a metal disk, 1a is a hole, 1b is a group of transmission slits, 1
c is a reflective part, 2 is a flange-shaped support part, 2a is a step part, 3 is a rotating shaft.Applicant: Delphi Co., Ltd. Agent Patent attorney Sakae Kobayashi's engraving of the drawing (no changes to the content) 1st Figure 2d... Written amendment to the procedure for formal introduction (voluntary) April 70, 1988 - + - 1. Indication of the case 1988 Patent Application No. 007747 2. Title of the invention Rotary plate 3 of reflective rotary encoder. Person making the amendment Relationship to the case Patent applicant 4, agent 〒160 Name (7510) Patent attorney Sakae Kobayashi-72,゛1 Telephone number
374-5890
Claims (1)
型金属円板反射部とこの金属円板反射部に、前記嵌合孔
を中心として放射状透過スリット群を設けてなる反射型
ロータリエンコーダの回転板。 ２、フォトエレクトロフォーミング等の手法により、ニ
ッケル等の金属材料で透過スリット群、回転軸嵌合孔、
外周を同時に同心的に形成した金属円板上面に前記透過
スリット群を除いて、高反射材をメッキ又は蒸着等の手
法により一様に展着することにより形成した反射部を有
する特許請求の範囲第１項記載の反射型ロータリエンコ
ーダの回転板。 ３、反射率を高めるためにロジウム、金又はアルミニウ
ムをメッキ又は蒸着した金属円板反射部を有する特許請
求の範囲第１項又は第２項記載の反射型ロータリエンコ
ーダの回転板。 ４、鍔状支持部と嵌合孔とを介して回転軸に嵌合固定し
た金属円板反射部を具えた特許請求の範囲第１項記載の
反射型ロータリエンコーダの回転板。[Scope of Claims] 1. A thin metal disc reflecting part with high reflectance having a rotating shaft fitting hole in its center, and a group of radial transmission slits centered around the fitting hole in this metal disc reflecting part. Rotating plate of a reflective rotary encoder. 2. Using methods such as photoelectroforming, transparent slit groups, rotating shaft fitting holes,
Claims include a reflective part formed by uniformly spreading a highly reflective material by a method such as plating or vapor deposition on the upper surface of a metal disk whose outer periphery is formed concentrically at the same time, excluding the group of transmission slits. The rotary plate of the reflective rotary encoder according to item 1. 3. The rotary plate of a reflective rotary encoder according to claim 1 or 2, which has a metal disc reflective portion plated or vapor-deposited with rhodium, gold, or aluminum to increase reflectance. 4. A rotary plate for a reflective rotary encoder according to claim 1, comprising a metal disc reflective portion that is fitted and fixed to the rotating shaft via a flange-like support portion and a fitting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP774787A JPS63175722A (en) | 1987-01-16 | 1987-01-16 | Rotary disk for reflection type rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP774787A JPS63175722A (en) | 1987-01-16 | 1987-01-16 | Rotary disk for reflection type rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63175722A true JPS63175722A (en) | 1988-07-20 |
Family
ID=11674290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP774787A Pending JPS63175722A (en) | 1987-01-16 | 1987-01-16 | Rotary disk for reflection type rotary encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63175722A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04370702A (en) * | 1991-06-20 | 1992-12-24 | Mitsubishi Electric Corp | Position detector |
| US5557101A (en) * | 1992-09-09 | 1996-09-17 | Daewoo Electronics Co., Ltd. | Reel table revolution detector for use in a video cassette recorder |
-
1987
- 1987-01-16 JP JP774787A patent/JPS63175722A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04370702A (en) * | 1991-06-20 | 1992-12-24 | Mitsubishi Electric Corp | Position detector |
| US5557101A (en) * | 1992-09-09 | 1996-09-17 | Daewoo Electronics Co., Ltd. | Reel table revolution detector for use in a video cassette recorder |
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