JPS603517A - Optical rotary encoder - Google Patents
Optical rotary encoderInfo
- Publication number
- JPS603517A JPS603517A JP11052183A JP11052183A JPS603517A JP S603517 A JPS603517 A JP S603517A JP 11052183 A JP11052183 A JP 11052183A JP 11052183 A JP11052183 A JP 11052183A JP S603517 A JPS603517 A JP S603517A
- Authority
- JP
- Japan
- Prior art keywords
- slit
- slit plate
- comb
- plate
- shape
- 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 11
- 239000000523 sample Substances 0.000 claims 2
- 238000003754 machining Methods 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 238000001259 photo etching Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009763 wire-cut EDM Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、光学的式ロータリーエンコーダーのコスト低
減に係り、スリット板の形成の改善に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to reducing the cost of optical rotary encoders and to improving the formation of slit plates.
従来、光学式エンコーダーは第１図に示す様に発光素子
１と受光素子２の間に、回転スリット板６と固定スリッ
ト板４を配置し、各光学素子間の透過光量を検出しデジ
タル信号に変換する。この様な光学式ロータリーエンコ
ーダーの性能とコストはスリット板によって決定される
。従来、スリット板は主としてガラス板にスリット部を
写真プリントする方法と、金属板にスリット穴を抜き加
工する方法の二種類があるが、最近は金属のスリット板
が低コストで加工できることから主流となっている。Conventionally, an optical encoder has a rotating slit plate 6 and a fixed slit plate 4 arranged between a light emitting element 1 and a light receiving element 2, as shown in Fig. 1, and detects the amount of light transmitted between each optical element and converts it into a digital signal. Convert. The performance and cost of such an optical rotary encoder are determined by the slit plate. Traditionally, there are two main types of slit plates: one is to print a photo of the slits on a glass plate, and the other is to punch slit holes in a metal plate.Recently, metal slit plates have become mainstream because they can be processed at low cost. It has become.
第２図は、金属板のフォトエツチング法で加工したスリ
ット板の平面図である。スリットの形状は光量の透過と
遮断の巾を大きくするため、扇形形状が一般的である。FIG. 2 is a plan view of a slit plate processed by photoetching a metal plate. The shape of the slit is generally fan-shaped in order to increase the width of transmission and blocking of the amount of light.
しかしこの扇形形状は従来のフォトエツチング法では容
易に加工することができるが、フォトエツチング法はレ
ジスト塗装。However, this fan-shaped shape can be easily processed using the conventional photo-etching method, but the photo-etching method requires resist painting.
露光、現像、エツチングと工程が長く、加工コストが高
いという欠点があった。The disadvantage is that the process of exposure, development, and etching is long, and the processing cost is high.
一方コスト的に有利な方法として、スリット板をプレス
抜きによってスリット穴を加工することが考えられるが
、金型の加工工数から見て極めて低スリットのものに限
定されるため、従来ではほとんど使用されていない。On the other hand, as a cost-effective method, it may be possible to form slit holes in a slit plate by press punching, but this is limited to extremely low slits in terms of the number of man-hours required for mold machining, so it has rarely been used in the past. Not yet.
本発明は、上記問題点及び欠点を除去するために、第６
図の様にスリット板の外周部側を開放し櫛形のスリット
にすることによって、スリット板のプレス加工化を可能
とすることにより、低コストノ光学式ロータリーエンコ
ーダーを提供することを目的とする。In order to eliminate the above problems and drawbacks, the present invention provides a sixth aspect of the present invention.
The object of the present invention is to provide a low-cost optical rotary encoder by opening the outer peripheral side of the slit plate to form comb-shaped slits as shown in the figure, thereby making it possible to press-work the slit plate.
以下第６図、第４図と共に本発明の特徴である櫛形形状
のプレス抜き金属スリット板について、製造方法も含め
て説明する。The comb-shaped pressed metal slit plate, which is a feature of the present invention, will be described below with reference to FIGS. 6 and 4, including its manufacturing method.
第３図は、櫛形プレス抜き金属スリット板の平面部分図
である。スリット板をこの様な形状にしても光学的特性
は、従来の扇形形状とほとんど差がなく実用上、問題な
い。FIG. 3 is a partial plan view of the comb-shaped pressed metal slit plate. Even if the slit plate is shaped like this, the optical characteristics are almost the same as those of the conventional sector shape, and there is no problem in practical use.
この様な櫛形形状のスリット板が使用可能になることに
よって、スリット板のプレス化が可能となる。By making it possible to use such a comb-shaped slit plate, it becomes possible to press the slit plate.
まずスリット穴抜き用の金型を加工する際、ＮＯワイヤ
ー放電加工によってパンチ・ダイが加工されるが、スリ
ット穴が第２図に示す様な扇形の場合、高分割のスリッ
ト穴にそれぞれ１個ずつワイヤーを通すことは、非常に
多くの労力を費し、事実上加工は不可能であった。今回
スリット穴の外周部を開放し櫛形にすることにより、第
４図に示す様にＮＯワイヤー放電加工によって連続して
スリット穴が切断できるため、極めて容易に金型製作が
できる。これは回転スリット、移動スリットともに適用
可能である。First, when machining a mold for punching slit holes, punches and dies are machined by NO wire electrical discharge machining, but if the slit holes are fan-shaped as shown in Figure 2, one punch and die will be made for each high-division slit hole. Threading the wire one by one was extremely labor-intensive and virtually impossible to process. This time, by opening the outer periphery of the slit hole and making it comb-shaped, the slit hole can be continuously cut by NO wire electric discharge machining, as shown in FIG. 4, making mold production extremely easy. This is applicable to both rotating slits and moving slits.
この様なスリット板のプレス化によって、スリット板の
加工時間はエツチング法に比べ１／２ｏ程度に低下でき
た。さらにスリット板のプレス化は、フォトエツチング
法に比べ歩留が大巾に向上し、検査工数が不要となった
。By pressing the slit plate in this manner, the processing time for the slit plate could be reduced to about 1/2 o compared to the etching method. Furthermore, press-forming the slit plate greatly improves yield compared to the photo-etching method, and eliminates the need for inspection man-hours.
以上の結果から、今回の光学式エンコーダーは＊＊ａｖ
ＣａｖＫＪｆ％ｈ。ＩＩｉ、 ＝＋ｘ ｂ＆！！−ｒ３
０ ％ｆｆｈ ”’滅することに成功した。From the above results, the optical encoder this time is **av
CavKJf%h. IIi, =+x b&! ! -r3
0% ffh "' succeeded in eradicating.
□第１図は光学式エンコーダーの組立図、第２図はフォ
トエツチング法による扇形スリット穴を持つスリット板
の平面図、第３図はプレス加工によ−る櫛形形状のスリ
ット板の平面図、第４図は櫛形形状のスリット抜き用の
金型を、ＮＯワイヤー放電加工機で加工中の略図を示す
。
以 上
出願人 株式会社 浜澤工業
代理人 弁理士 最上 務
（５） 。
冨ＩＭ□Figure 1 is an assembly diagram of the optical encoder, Figure 2 is a plan view of a slit plate with sector-shaped slit holes made by photo-etching, and Figure 3 is a plan view of a comb-shaped slit plate made by press working. FIG. 4 shows a schematic diagram of a comb-shaped slit punching die being machined using an NO wire electrical discharge machine. The above applicant is Hamazawa Industrial Agent Co., Ltd. Patent attorney Tsutomu Mogami (5). Tomi IM
Claims (1)
た複数のスリット穴を、等間隔に配列された回転スリッ
ト板と、これに隣接した位置に固定されその面に前記回
転スリット板と同じく複数のスリット穴を持つ固定スリ
ットにより、光学的透過光量を検出する構造のロータリ
ーエンコーダーおいて、前記の回転スリット板並びに固
定スリット板に、櫛形形状のスリット板を使用した事を
特徴とする光学式ロータリーエンコーダー。A rotating slit plate has a plurality of slit holes mounted on a shaft that rotates in accordance with the amount of movement of the probe and is arranged at equal intervals, and a rotating slit plate fixed at a position adjacent to the rotating slit plate has a plurality of slit holes mounted on a shaft that rotates in accordance with the amount of movement of the probe. Similarly, in a rotary encoder structured to detect the amount of optically transmitted light by a fixed slit having a plurality of slit holes, an optical system characterized in that a comb-shaped slit plate is used as the rotating slit plate and the fixed slit plate. rotary encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11052183A JPS603517A (en) | 1983-06-20 | 1983-06-20 | Optical rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11052183A JPS603517A (en) | 1983-06-20 | 1983-06-20 | Optical rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS603517A true JPS603517A (en) | 1985-01-09 |
Family
ID=14537901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11052183A Pending JPS603517A (en) | 1983-06-20 | 1983-06-20 | Optical rotary encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603517A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6541760B2 (en) * | 2000-01-19 | 2003-04-01 | Alps Electric Co., Ltd. | Rotation detecting apparatus detecting rotation operation by light transmission to prevent invalid detection |
-
1983
- 1983-06-20 JP JP11052183A patent/JPS603517A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6541760B2 (en) * | 2000-01-19 | 2003-04-01 | Alps Electric Co., Ltd. | Rotation detecting apparatus detecting rotation operation by light transmission to prevent invalid detection |
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