JP2001235348A - Encoder apparatus - Google Patents
Encoder apparatusInfo
- Publication number
- JP2001235348A JP2001235348A JP2000044496A JP2000044496A JP2001235348A JP 2001235348 A JP2001235348 A JP 2001235348A JP 2000044496 A JP2000044496 A JP 2000044496A JP 2000044496 A JP2000044496 A JP 2000044496A JP 2001235348 A JP2001235348 A JP 2001235348A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- code plate
- rotating shaft
- rotation
- ring
- 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
Landscapes
- Optical Transform (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、エンコーダ装置に
関し、特に、回転軸の外周位置に設けられた輪状溝によ
り、軸受から漏れ出たグリス等の油性物質を受け、回転
符号板への油性物質の悪影響を防止するための新規な改
良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encoder device, and more particularly, to an oil-based substance such as grease leaked from a bearing by a ring-shaped groove provided at an outer peripheral position of a rotary shaft, and to an oil-based substance on a rotary code plate. New improvement for preventing adverse effects of
【０００２】[0002]
【従来の技術】従来、用いられていたこの種のエンコー
ダ装置としては、一般に、図３及び図４で示される構成
が採用されていた。すなわち、図３において符号１で示
されるものは基台であり、この基台１には軸受２を介し
て回転軸３が回転自在に設けられている。前記回転軸３
の端部側には回転符号パターンを有する回転符号板４が
回転軸３と共に回転するように固定され、前記軸受２と
回転符号板４間には筒体５が設けられている。2. Description of the Related Art Conventionally, as an encoder device of this kind, a structure shown in FIGS. 3 and 4 has been generally employed. That is, what is indicated by reference numeral 1 in FIG. 3 is a base, on which a rotating shaft 3 is rotatably provided via a bearing 2. The rotating shaft 3
A rotation code plate 4 having a rotation code pattern is fixed to the end side of the shaft so as to rotate together with the rotation shaft 3, and a cylindrical body 5 is provided between the bearing 2 and the rotation code plate 4.
【０００３】前記基台１上には受光体６を有する基板７
が設けられ、この基板７は回転符号板４と軸受２との間
に位置している。前記回転符号板４の外側位置にはＬＥ
Ｄ等からなる光源８が設けられ、この光源８からの光は
回転符号板４のパターンを通過して受光体６で受光され
ると共に、前記光源８と受光体６とは回転符号板４を挟
むように互いに対向して配設されている。従って、回転
軸と共に回転する回転符号板４のパターンすなわちスリ
ットを光源８からの光が通過して受光体６で受光される
ことによりエンコーダ信号が受光体６から出力される。
また、図４のように、筒体５を用いないで回転軸３に段
部３ａを形成した従来形態も採用されていた。A substrate 7 having a photoreceptor 6 is provided on the base 1.
The substrate 7 is located between the rotation code plate 4 and the bearing 2. LE on the outer side of the rotation code plate 4
A light source 8 made of D or the like is provided, and the light from the light source 8 passes through the pattern of the rotary code plate 4 and is received by the photoreceptor 6. They are arranged facing each other so as to sandwich them. Therefore, the light from the light source 8 passes through the pattern of the rotation code plate 4 that rotates with the rotation axis, that is, the slit, and is received by the photoreceptor 6, whereby the encoder signal is output from the photoreceptor 6.
In addition, as shown in FIG. 4, a conventional embodiment in which a step 3a is formed on the rotating shaft 3 without using the cylindrical body 5 has also been adopted.
【０００４】[0004]
【発明が解決しようとする課題】従来のエンコーダ装置
は、以上のように構成されていたため、次のような課題
が存在していた。すなわち、軸受内に設けられているグ
リス等の油性物質が軸受の内輪と外輪間の隙間から矢印
Ａのように筒体の外周面を経て回転符号板のパターン側
に付着し、光源からの透過光に悪影響を与え、エンコー
ダ信号の精度に影響が及ぶことになっていた。Since the conventional encoder device is configured as described above, there are the following problems. That is, an oily substance such as grease provided in the bearing adheres to the pattern side of the rotation code plate through the outer peripheral surface of the cylindrical body as shown by an arrow A from a gap between the inner ring and the outer ring of the bearing, and transmits light from the light source. This would adversely affect light and affect the accuracy of the encoder signal.
【０００５】本発明は、以上のような課題を解決するた
めになされたもので、特に、回転軸の外周位置に設けら
れた輪状溝により、軸受から漏れ出たグリス等の油性物
質を受け、回転符号板への油性物質の悪影響を防止する
ようにしたエンコーダ装置を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in particular, receives an oily substance such as grease leaked from a bearing by a ring-shaped groove provided at an outer peripheral position of a rotating shaft. An object of the present invention is to provide an encoder device that prevents an adverse effect of an oily substance on a rotation code plate.
【０００６】[0006]
【課題を解決するための手段】本発明によるエンコーダ
装置は、基台に軸受を介して回転自在に設けられた回転
軸に回転符号板を設け、前記回転符号板を挟むように光
源と受光体が対向して設けられたエンコーダ装置におい
て、前記回転軸の外周に同軸配置されると共に前記回転
符号板と前記軸受間に位置する筒体と、前記筒体の外周
面に形成された輪状溝とを備え、前記軸受から漏れた油
性物質を前記輪状溝で受けるようにした構成であり、ま
た、基台に軸受を介して回転自在に設けられた回転軸に
回転符号板を設け、前記回転符号板を挟むように光源と
受光体が対向して設けられたエンコーダ装置において、
前記回転軸の外周面に形成された輪状溝を備え、前記軸
受から漏れた油性物質を前記輪状溝で受けるようにした
構成であり、また、前記輪状溝は、複数よりなる構成で
ある。According to the present invention, there is provided an encoder apparatus comprising: a rotation code plate provided on a rotation shaft rotatably provided on a base via a bearing; and a light source and a photoreceptor sandwiching the rotation code plate. In the encoder device provided opposed to, a cylindrical body coaxially arranged on the outer periphery of the rotating shaft and located between the rotation code plate and the bearing, and a ring-shaped groove formed on the outer peripheral surface of the cylindrical body The ring-shaped groove is configured to receive the oily substance leaking from the bearing, and a rotation code plate is provided on a rotation shaft rotatably provided on the base via the bearing, and the rotation code is provided. In an encoder device in which a light source and a photoreceptor are provided so as to sandwich a plate,
An annular groove formed on the outer peripheral surface of the rotating shaft is provided so that the oily substance leaking from the bearing is received by the annular groove, and the annular groove is configured by a plurality.
【０００７】[0007]
【発明の実施の形態】以下、図面と共に本発明によるエ
ンコーダ装置の好適な実施の形態について説明する。な
お、従来例と同一又は同等部分には同一符号を付して説
明する。図１において符号１で示されるものは基台であ
り、この基台１には軸受２を介して回転軸３が回転自在
に設けられている。前記回転軸３の端部側には、回転符
号パターンを有する回転符号板４が回転軸３と共に回転
するように固定され、前記軸受２と回転符号板４間には
筒体５が設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an encoder device according to the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals. In FIG. 1, a base indicated by reference numeral 1 is a base, on which a rotating shaft 3 is rotatably provided via a bearing 2. A rotation code plate 4 having a rotation code pattern is fixed to an end side of the rotation shaft 3 so as to rotate together with the rotation shaft 3, and a cylindrical body 5 is provided between the bearing 2 and the rotation code plate 4. I have.
【０００８】前記筒体５の外周面には、輪状に形成され
た一条（螺旋形となる）又は複数条の輪状溝１０が形成
され、前記基台１上には受光体６を有する基板７が設け
られ、この基板７は回転符号板４と軸受２との間に位置
している。On the outer peripheral surface of the cylindrical body 5, one (spiral) or a plurality of annular grooves 10 formed in a ring shape are formed, and a substrate 7 having a photoreceptor 6 is provided on the base 1. The substrate 7 is located between the rotation code plate 4 and the bearing 2.
【０００９】前記回転符号板４の外側位置には、ＬＥＤ
等からなる光源８が設けられ、この光源８からの光は回
転符号板４のパターンを通過して受光体６で受光される
と共に、前記光源８と受光体６とは回転符号板４を挟む
ように互いに対向して配設されている。An LED is provided outside the rotation code plate 4.
The light from the light source 8 passes through the pattern of the rotary code plate 4 and is received by the photoreceptor 6, and the light source 8 and the photoreceptor 6 sandwich the rotary code plate 4. As shown in FIG.
【００１０】次に、動作について説明する。まず、回転
軸と共に回転する回転符号板４のパターンを光源８から
の光が通過して受光体６で受光されることにより、エン
コーダ信号が受光体６から出力される。前述の場合、軸
受２から漏れ出たグリス等の油性物質２０は、筒体５の
輪状溝１０内で受けられ、従来のように回転符号板４に
付着することはなく、輪状溝１０で受けられた油性物質
２０の量が多くなると、図示されるように、基板７手前
の基台１の凹部１ａ内に飛散する。Next, the operation will be described. First, the light from the light source 8 passes through the pattern of the rotation code plate 4 that rotates with the rotation axis, and is received by the light receiving body 6. In the case described above, the oily substance 20 such as grease that has leaked from the bearing 2 is received in the annular groove 10 of the cylindrical body 5 and does not adhere to the rotation code plate 4 as in the related art, but is received by the annular groove 10. When the amount of the oily substance 20 increases, the oily substance 20 scatters into the concave portion 1a of the base 1 in front of the substrate 7 as shown in the figure.
【００１１】また、図２は本発明の他の形態を示すもの
で、同一部分には同一符号を付し、図１と異なる部分に
ついてのみ説明する。すなわち、回転軸３には前記筒体
５が同軸状に設けられているのではなく、輪状溝１０を
有する部位が径大化され、回転軸３の外周面に直接輪状
溝１０が形成されている。なお、他の部分は図１と同一
であるため、同一部分には同一符号を付し、その説明を
省略する。FIG. 2 shows another embodiment of the present invention, in which the same portions are denoted by the same reference numerals, and only the portions different from FIG. 1 will be described. That is, the cylindrical body 5 is not provided coaxially on the rotating shaft 3, but the portion having the annular groove 10 is enlarged in diameter, and the annular groove 10 is formed directly on the outer peripheral surface of the rotating shaft 3. I have. Since other parts are the same as those in FIG. 1, the same parts are denoted by the same reference numerals and description thereof will be omitted.
【００１２】[0012]
【発明の効果】本発明によるエンコーダ装置は、以上の
ように構成されているため、次のような効果を得ること
ができる。すなわち、回転軸の外周面に直接又は回転軸
の外周に設けられた輪状溝によって軸受から漏れ出たグ
リス等の油性物質はこの輪状溝によって捕足され、回転
符号板側への油性物質の付着を防止することができ、エ
ンコーダ信号の精度低下を防止することができる。Since the encoder device according to the present invention is configured as described above, the following effects can be obtained. That is, oily substances such as grease leaked from the bearing by the annular groove provided directly on the outer peripheral surface of the rotating shaft or on the outer peripheral surface of the rotating shaft are captured by the annular groove, and the oily substance adheres to the rotation code plate side. Can be prevented, and a decrease in the accuracy of the encoder signal can be prevented.
【図１】本発明によるエンコーダ装置を示す断面構成図
である。FIG. 1 is a cross-sectional configuration diagram showing an encoder device according to the present invention.
【図２】図１の他の形態を示す断面構成図である。FIG. 2 is a cross-sectional configuration diagram showing another embodiment of FIG.
【図３】従来のエンコーダ装置を示す断面構成図であ
る。FIG. 3 is a cross-sectional configuration diagram showing a conventional encoder device.
【図４】図３の他の従来例を示す断面構成図である。FIG. 4 is a sectional configuration diagram showing another conventional example of FIG. 3;
１ 基台 ２ 軸受 ３ 回転軸 ４ 回転符号板 ５ 筒体 ６ 受光体 ８ 光源 １０ 輪状溝 ２０ 油性物質 DESCRIPTION OF SYMBOLS 1 Base 2 Bearing 3 Rotation shaft 4 Rotation code plate 5 Cylindrical body 6 Light receiving body 8 Light source 10 Ring groove 20 Oily substance
Claims (3)
けられた回転軸(3)に回転符号板(4)を設け、前記回転符
号板(4)を挟むように光源(8)と受光体(6)が対向して設
けられたエンコーダ装置において、前記回転軸(3)の外
周に同軸配置されると共に前記回転符号板(4)と前記軸
受(2)間に位置する筒体(5)と、前記筒体(5)の外周面に
形成された輪状溝(10)とを備え、前記軸受(2)から漏れ
た油性物質(20)を前記輪状溝(10)で受けるように構成し
たことを特徴とするエンコーダ装置。A rotating code plate (4) is provided on a rotating shaft (3) rotatably provided on a base (1) via a bearing (2) so as to sandwich the rotating code plate (4). In an encoder device in which a light source (8) and a photoreceptor (6) are provided to face each other, the encoder is coaxially arranged on the outer periphery of the rotation shaft (3) and between the rotation code plate (4) and the bearing (2). A cylindrical body (5), and a ring-shaped groove (10) formed on the outer peripheral surface of the cylinder (5) .The oil-based substance (20) leaked from the bearing (2) is filled with the ring-shaped groove (10). ).
けられた回転軸(3)に回転符号板(4)を設け、前記回転符
号板(4)を挟むように光源(8)と受光体(6)が対向して設
けられたエンコーダ装置において、前記回転軸(3)の外
周面に形成された輪状溝(10)を備え、前記軸受(2)から
漏れた油性物質(20)を前記輪状溝(10)で受けるように構
成したことを特徴とするエンコーダ装置。2. A rotation code plate (4) is provided on a rotation shaft (3) rotatably provided on a base (1) via a bearing (2) so as to sandwich the rotation code plate (4). In an encoder device in which a light source (8) and a photoreceptor (6) are provided to face each other, the encoder device includes a ring-shaped groove (10) formed on an outer peripheral surface of the rotating shaft (3), and leaks from the bearing (2). An encoder device characterized in that an oily substance (20) is received by the annular groove (10).
特徴とする請求項１又は２記載のエンコーダ装置。3. The encoder device according to claim 1, wherein the annular groove (10) comprises a plurality of grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000044496A JP2001235348A (en) | 2000-02-22 | 2000-02-22 | Encoder apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000044496A JP2001235348A (en) | 2000-02-22 | 2000-02-22 | Encoder apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001235348A true JP2001235348A (en) | 2001-08-31 |
Family
ID=18567237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000044496A Pending JP2001235348A (en) | 2000-02-22 | 2000-02-22 | Encoder apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001235348A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101349618B1 (en) | 2012-04-30 | 2014-01-15 | 재단법인 포항지능로봇연구소 | Encoder |
-
2000
- 2000-02-22 JP JP2000044496A patent/JP2001235348A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101349618B1 (en) | 2012-04-30 | 2014-01-15 | 재단법인 포항지능로봇연구소 | Encoder |
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