JPS62277521A - Rotary encoder - Google Patents

Rotary encoder

Info

Publication number
JPS62277521A
JPS62277521A JP12007286A JP12007286A JPS62277521A JP S62277521 A JPS62277521 A JP S62277521A JP 12007286 A JP12007286 A JP 12007286A JP 12007286 A JP12007286 A JP 12007286A JP S62277521 A JPS62277521 A JP S62277521A
Authority
JP
Japan
Prior art keywords
rotating shaft
electronic circuit
base
ground
rotary encoder
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
JP12007286A
Other languages
Japanese (ja)
Inventor
Shigeo Seki
関 重夫
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.)
Tamagawa Seiki Co Ltd
Original Assignee
Tamagawa Seiki Co Ltd
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 Tamagawa Seiki Co Ltd filed Critical Tamagawa Seiki Co Ltd
Priority to JP12007286A priority Critical patent/JPS62277521A/en
Publication of JPS62277521A publication Critical patent/JPS62277521A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a device which generates a stable output signal even in noisy environment and never has a short current by connecting the ground of an electronic circuit part to a metallic film part and shielding an electronic circuit part by the metallic film part. CONSTITUTION:A base is mounted on the rotary part of a machine tool, etc., and a rotating shaft 3 is connected to the rotating shaft of the machine tool. Then the rotating shaft 3 rotates and a rotary disk 8 also rotates at the same time. Light from a light emitting element 9 passes through the disk 8 and the slit of a fixed slit plate 5 and is photodetected by a light receiving element 6. The output signal of this element 6 is applied to the electronic circuit part 7 to detect the rotation state, rotating speed, etc., of the rotating shaft 3 and then sent as a digital signal to a processing part through a connection line 15. Further, the base 1 and a case body 10 are made of insulators, so the ground of the circuit part 7 and a power supply line 15a which are connected to a metallic film part 11 does not contact the ground and a short current is completely eliminated.

Description

【発明の詳細な説明】 3、発明の詳細な説明 乙産業上の利用分野 本発明はロータリエンコーダに関し、特に、電気的ノイ
ズの極めて多い環境においても所要の出力特性を得るこ
とができるようにするための新規な改良に関する。
[Detailed Description of the Invention] 3. Detailed Description of the Invention B Industrial Field of Use The present invention relates to a rotary encoder, and particularly to a rotary encoder that can obtain required output characteristics even in an environment with extremely high electrical noise. Concerning new improvements for.

b、従来の技術 従来、用いられていたこの踵のロータリエンコーダとし
ては、種々の構成が提案され、採用されている。これら
のうち、いずれの構成においても、文献としては示され
ていないが、最も安易な手段として、ロータリエンコー
ダへの供給電源のグランドを、ロータリエンコーダの金
属製の基台に装着された金属製のケース体と接続する等
の手段によって、外部ノイズからのノイズ侵入の防止を
行っていた。
b. Prior Art Various configurations have been proposed and employed for the heel rotary encoder that has been used in the past. Although none of these configurations are shown in the literature, the simplest method is to connect the ground of the power supply to the rotary encoder to a metal base mounted on the metal base of the rotary encoder. Noise intrusion from external noise was prevented by means such as connection to the case body.

C0発明が解決しようとする問題点 従来のロータリエンコーダは、以上のように構成されて
いたため、例えば、工作機等に取付けたロータリエンコ
ーダのケース体自体が大地にアースされている場合、前
述の供給電源のグランドが大地に接続きれることばなり
、このような条件下では、漏電の問題が発生していた。
C0 Problems to be Solved by the Invention Conventional rotary encoders were constructed as described above. This meant that the ground of the power supply could not be connected to the earth, and under such conditions, problems of leakage occurred.

本発明は、以上のような問題点を速やかに解決し、極め
てノイズの多い環境下でも安定した出力信号が得られる
と共に、漏電のおそれが全くない構成のロータリエンコ
ーダを得ることを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to promptly solve the above-mentioned problems, and to obtain a rotary encoder having a configuration in which a stable output signal can be obtained even in an extremely noisy environment, and there is no risk of electrical leakage.

己問題点を解決するための手段 本発明によるロータリエンコーダは、絶縁材よりなる基
部に軸受部を介して回転自在に設けられた回転軸と、前
記回転軸に設けられ、所要のスリットを有する回゛転円
板と、前記回転円板の一面側に固定スリットを介して固
定して設けられた受光素子と、前記回路円板の他面側に
固定して設けられ、受光素子及び電子回路部を有するプ
リント基板と、前記基部に装着され、絶縁材よりなるケ
ース体と、前記ケース体の内面に形成された金属膜部と
を備えた構成である。
Means for Solving the Problems The rotary encoder according to the present invention includes a rotary shaft rotatably provided on a base made of an insulating material via a bearing, and a circuit provided on the rotary shaft having a required slit. A rotating disk, a light receiving element fixedly provided on one side of the rotating disk via a fixing slit, and a light receiving element and an electronic circuit section fixedly provided on the other side of the circuit disk. The device is configured to include a printed circuit board having a base portion, a case body made of an insulating material and mounted on the base portion, and a metal film portion formed on the inner surface of the case body.

6作 用 本発明によるロータリエンコーダにおいては、前記電子
回路部のグランドが前記金属膜部に接続され、この金属
膜部により前記電子回路部に対するシールド作用を行う
ようにしたため、極めてノイズの多い場所においても、
外部ノイズを拾うことな(、安定した出力を得ることが
できると共に、ケース体及び基台が絶縁材で構成されて
いるため、金属膜部が大地に接地することがなく、漏電
を完全に防止することができる。
6 Functions In the rotary encoder according to the present invention, the ground of the electronic circuit section is connected to the metal film section, and this metal film section performs a shielding effect on the electronic circuit section, so that it can be used in extremely noisy places. too,
A stable output can be obtained without picking up external noise, and since the case body and base are made of insulating material, the metal membrane part will not be grounded to the earth, completely preventing electrical leakage. can do.

f、実施例 以下、図面と共に本発明によるロータリエンコーダの好
適な実施例について詳細に説明する。
f. Embodiments Hereinafter, preferred embodiments of the rotary encoder according to the present invention will be described in detail with reference to the drawings.

第1図は本発明によるロータリエンコーダを示すための
断面図であり、図において符号1で示されるものは軸受
2を有する基台であり、この基台1は全体が樹脂等の絶
縁材で形成されている。
FIG. 1 is a cross-sectional view showing a rotary encoder according to the present invention. In the figure, what is indicated by reference numeral 1 is a base having a bearing 2, and this base 1 is entirely made of an insulating material such as resin. has been done.

この基台1の軸受2には、回転軸3が回転自在に設けら
れ、この回転軸6の上端には、図示しないスリットを有
する回転円板4が固定して設けられている。
A rotating shaft 3 is rotatably provided in the bearing 2 of the base 1, and a rotating disk 4 having a slit (not shown) is fixedly provided at the upper end of the rotating shaft 6.

前記回転円板4の下部位置には、固定スリット板5及び
受光素子6が、図示しない固定手段を介して、互いに上
下関係位置に固定して配設されている。
A fixed slit plate 5 and a light-receiving element 6 are disposed at a lower position of the rotary disk 4 so as to be fixed in a vertical relationship with each other via a fixing means (not shown).

又、前記回転円板4゛の上部位置には、電子回路部7を
有するプリント基板8が、図示しない固定手段を介して
、固定して配設され、このプリント基板8の下面に設け
られた発光素子9は、前記回転円板4のスリット(図示
せず)、固定スリット板5のスリット(図示せず)及び
受光素子6と同一軸線上に配設されており、前記発光素
子9からの光は、前述の各スリットを経て前記受光素子
6に到達する構成である。
Further, a printed circuit board 8 having an electronic circuit section 7 is fixedly disposed at an upper position of the rotary disk 4'' via a fixing means (not shown), and a printed circuit board 8 is provided on the lower surface of the printed circuit board 8. The light emitting element 9 is disposed on the same axis as the slit of the rotating disk 4 (not shown), the slit of the fixed slit plate 5 (not shown), and the light receiving element 6. The configuration is such that the light reaches the light receiving element 6 through each of the slits described above.

前記基台1には、断面形状がカップ形をなすと共に、樹
脂等の絶縁材で構成されたケース体10が嵌着して設け
られ、このケース体1oの内側には、メッキ等の手段に
よ、り形成された金属膜部11が設けられており、この
金属膜部11と前記電子回路部7のグランド7aとは、
グランド線12によシミ気的に接続されている。
A case body 10 having a cup-shaped cross section and made of an insulating material such as resin is fitted onto the base 1, and the inside of the case body 1o is coated with plating or other means. A metal film portion 11 is provided, and this metal film portion 11 and the ground 7a of the electronic circuit portion 7 are as follows.
It is electrically connected to the ground line 12.

前記ケース体10及び金属膜部11の一部に形成された
貫通孔16には、ブツシュ14を介して、電源供給線1
5a及び信号線15bとからなる接続線15が貫通して
設けられ、この接続線15の一端は前記電子回路部7に
接続されていることによシ、電源供給線15aのグラン
ドが金属膜部11と接続されている。
A power supply line 1 is connected to a through hole 16 formed in a part of the case body 10 and the metal film part 11 through a bushing 14.
5a and a signal line 15b is provided to penetrate through the connection line 15, and one end of this connection line 15 is connected to the electronic circuit section 7, so that the ground of the power supply line 15a is connected to the metal film section. It is connected to 11.

さらに、前記基台1の面上には、金属膜部11aが形成
され、この金属膜部j1aは前記金属膜部11と接続さ
れ、この金属膜部11と11aとによシ、前記電子回路
部7.は外部からのノイズに対し、完全にシールドされ
ている。
Further, a metal film portion 11a is formed on the surface of the base 1, and this metal film portion j1a is connected to the metal film portion 11, and the electronic circuit is connected to the metal film portions 11 and 11a. Part 7. is completely shielded from external noise.

従って、前述の構成によれば、基台1が絶縁材で成形さ
れているため、この基台1を工作機等に装着した場合で
も、前記金属膜部11及び11aは、この工作機等とは
電気的には接続されず、かつ、大地と接続されることも
発生しな(So 本発明てよるロータリエンコーダは、前述シたように構
成されており、以下K、その動作について説明する。
Therefore, according to the above-mentioned configuration, since the base 1 is formed of an insulating material, even when the base 1 is mounted on a machine tool, etc., the metal film parts 11 and 11a are attached to the machine tool, etc. The rotary encoder according to the present invention is constructed as described above, and its operation will be explained below.

第1図に示される状態で、基台1を図示しない工作機等
の回転部分に装着し、回転軸3を工作機の回転軸(図示
せず)と接続すると、回転軸3が回転され、゛同時に、
回転円板8も回転し、発光素子9からの光が回転円板8
及び固定スリット板5のスリット(図示せず)を経て受
光素子6に受光され、この受光素子6の出力信号が電子
回路部7に印加されて、回転軸3の回転状態、回転数等
が検出処理され、デジタル信号として接続線15を介し
て、図示しない処理部に送られる。
In the state shown in FIG. 1, when the base 1 is attached to a rotating part of a machine tool (not shown) and the rotating shaft 3 is connected to the rotating shaft (not shown) of the machine tool, the rotating shaft 3 is rotated.゛At the same time,
The rotating disk 8 also rotates, and the light from the light emitting element 9 is transmitted to the rotating disk 8.
The light is received by the light receiving element 6 through the slit (not shown) of the fixed slit plate 5, and the output signal of the light receiving element 6 is applied to the electronic circuit section 7 to detect the rotation state, rotation speed, etc. of the rotating shaft 3. The signal is processed and sent as a digital signal to a processing section (not shown) via the connection line 15.

又、前述の状態において、前記基台1が絶縁材で構成さ
れると共に、前記ケース体10も絶縁材で構成されてい
るため、前記金属膜部11と接続した電子回路部7及び
電源供給線15aのグランドは、大地と接続せず、漏電
を完全に防止することができる。
Further, in the above-mentioned state, since the base 1 is made of an insulating material and the case body 10 is also made of an insulating material, the electronic circuit part 7 and the power supply line connected to the metal film part 11 are The ground 15a is not connected to the earth and can completely prevent electrical leakage.

g6発明の効果 本発明によるロータリエンコーダは、以上のような構成
と作用とを備えているため、電子回路部に対する外部か
らのノイズ侵入を、金属膜部によって完全に防止するこ
とができると共に、この金属膜部が大地と接地すること
による漏電を完全に防止することができる。
g6 Effects of the Invention Since the rotary encoder according to the present invention has the above-described configuration and operation, it is possible to completely prevent noise from entering the electronic circuit section from the outside, and also to completely prevent noise from entering the electronic circuit section from the outside. Electrical leakage caused by the metal film portion being grounded to the earth can be completely prevented.

従って、工作機等の回転部分に、このロータリエンコー
ダを装着する場合、基台と工作機との間に絶縁板等を間
に介装することなく、装着することが可能であり、ユー
ザーの使用上の便利性を一段と向上させることができる
Therefore, when installing this rotary encoder on the rotating part of a machine tool, etc., it can be installed without interposing an insulating plate between the base and the machine tool, making it easy for the user to use. The above convenience can be further improved.

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

第1図は本発明によるロータリエンコーダを示すための
断面図である。 1は基台、2は軸受、3は回転軸、4は回転円板、5は
固定スリット板、6は受光素子、7は電子回路部、7a
はグランド部、8はプリント基板、9は発光素子、10
はケース体、11及び11aは金属膜体、12はグラン
ド線、15は接続線である。
FIG. 1 is a sectional view showing a rotary encoder according to the present invention. 1 is a base, 2 is a bearing, 3 is a rotating shaft, 4 is a rotating disk, 5 is a fixed slit plate, 6 is a light receiving element, 7 is an electronic circuit section, 7a
is a ground part, 8 is a printed circuit board, 9 is a light emitting element, 10
1 is a case body, 11 and 11a are metal film bodies, 12 is a ground line, and 15 is a connection line.

Claims (1)

【特許請求の範囲】[Claims] 絶縁材よりなる基部(1)に軸受部(2)を介して回転
自在に設けられた回転軸(3)と、前記回転軸(3)に
設けられ、所要のスリットを有する回転円板(4)と、
前記回転円板(4)の一面側に固定スリット板(5)を
介して固定して設けられた受光素子(6)と、前記回転
円板(4)の他面側に固定して設けられ、発光素子(9
)及び電子回路部(7)を有するプリント基板(8)と
、前記基部(1)に装着され、絶縁材よりなるケース体
(10)と、前記ケース体(10)の内面に形成された
金属膜部(11)とを備え、前記電子回路部(7)のグ
ランド(7a)と前記金属膜部(11)とを接続し、こ
の金属膜部(11)により前記電子回路部(7)に対す
るシールド作用を行うようにしたことを特徴とするロー
タリエンコーダ。
A rotating shaft (3) rotatably provided on a base (1) made of an insulating material via a bearing part (2), and a rotating disk (4) provided on the rotating shaft (3) and having a required slit. )and,
A light receiving element (6) is fixedly provided on one side of the rotating disk (4) via a fixed slit plate (5), and a light receiving element (6) is fixedly provided on the other side of the rotating disk (4). , light emitting element (9
) and an electronic circuit section (7); a case body (10) made of an insulating material and attached to the base (1); and a metal formed on the inner surface of the case body (10). The metal film part (11) connects the ground (7a) of the electronic circuit part (7) and the metal film part (11). A rotary encoder characterized by having a shielding effect.
JP12007286A 1986-05-27 1986-05-27 Rotary encoder Pending JPS62277521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12007286A JPS62277521A (en) 1986-05-27 1986-05-27 Rotary encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12007286A JPS62277521A (en) 1986-05-27 1986-05-27 Rotary encoder

Publications (1)

Publication Number Publication Date
JPS62277521A true JPS62277521A (en) 1987-12-02

Family

ID=14777203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12007286A Pending JPS62277521A (en) 1986-05-27 1986-05-27 Rotary encoder

Country Status (1)

Country Link
JP (1) JPS62277521A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH029824U (en) * 1988-06-30 1990-01-22
JPH029823U (en) * 1988-06-30 1990-01-22
JPH05281101A (en) * 1992-03-31 1993-10-29 Agency Of Ind Science & Technol Method and apparatus for extracting ae signals on rotary body
US7222543B2 (en) 2004-11-23 2007-05-29 Dr. Johannes Heidenhain Gmbh Modular encoder, method of producing a modular encoder, and system for measuring angular movement
WO2013098935A1 (en) * 2011-12-27 2013-07-04 株式会社安川電機 Encoder and servomotor
CN104121933A (en) * 2014-07-07 2014-10-29 林云 Rotary encoder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH029824U (en) * 1988-06-30 1990-01-22
JPH029823U (en) * 1988-06-30 1990-01-22
JPH05281101A (en) * 1992-03-31 1993-10-29 Agency Of Ind Science & Technol Method and apparatus for extracting ae signals on rotary body
US7222543B2 (en) 2004-11-23 2007-05-29 Dr. Johannes Heidenhain Gmbh Modular encoder, method of producing a modular encoder, and system for measuring angular movement
WO2013098935A1 (en) * 2011-12-27 2013-07-04 株式会社安川電機 Encoder and servomotor
CN103946675A (en) * 2011-12-27 2014-07-23 株式会社安川电机 Encoder and servomotor
CN104121933A (en) * 2014-07-07 2014-10-29 林云 Rotary encoder

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