JPH0531521Y2 - - Google Patents
Info
- Publication number
- JPH0531521Y2 JPH0531521Y2 JP1985151461U JP15146185U JPH0531521Y2 JP H0531521 Y2 JPH0531521 Y2 JP H0531521Y2 JP 1985151461 U JP1985151461 U JP 1985151461U JP 15146185 U JP15146185 U JP 15146185U JP H0531521 Y2 JPH0531521 Y2 JP H0531521Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- wire
- rod
- axial direction
- linear scale
- 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.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 61
- 239000000696 magnetic material Substances 0.000 claims description 7
- 239000003302 ferromagnetic material Substances 0.000 claims description 5
- 230000005415 magnetization Effects 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はプリンタ、数値制御機械などに使用さ
れている直線位置を検出するための磁気リニアス
ケールに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic linear scale for detecting linear position used in printers, numerical control machines, etc.
プリンタ、数値制御機械などには第５図に示す
ような非磁性材よりなる棒体１の外周の一部に軸
に平行に強磁性体よりなる磁性線２が埋め込まれ
この磁性線２の表面に磁気センサ３が狭い間隔を
隔てて互に移動し直線位置を検出する磁気リニア
スケールが用いられている。従来この種の磁気リ
ニアスケールは直径D1のステンレスなどの非磁
性材よりなる棒体１の側面に、Fe−Ni−Cr合金
からなり磁界の強さHc＝400〜800エルスツドで
外径が1.4〜2.0mm程度の磁性線２が一部を外周に
露出して埋込まれている。この棒体１の両端は軸
受４で保持され、また磁性体２に長手方向に所定
のピツチＰで磁気書き込みによつて磁化されてい
る。磁気書き込みが行なわれた磁性線２には第８
図に示すように間隔g2を隔てて磁気センサ３が固
定されている。いま第１図の矢印のように棒体１
が往復移動すると磁気センサ３からは書き込みピ
ツチに相当した出力が得られ、この出力を回路演
算処理を行なつて精密な位置の検出が行なわれ
る。
In printers, numerical control machines, etc., a magnetic wire 2 made of a ferromagnetic material is embedded in a part of the outer periphery of a rod 1 made of a non-magnetic material parallel to the axis as shown in FIG. A magnetic linear scale is used in which magnetic sensors 3 move relative to each other at narrow intervals to detect linear positions. Conventionally, this type of magnetic linear scale has a rod 1 made of a non-magnetic material such as stainless steel with a diameter D 1 and an outer diameter made of a Fe-Ni-Cr alloy with a magnetic field strength H c = 400 to 800 oersd. A magnetic wire 2 of about 1.4 to 2.0 mm is embedded with a part exposed on the outer periphery. Both ends of the rod 1 are held by bearings 4, and magnetized by magnetic writing at a predetermined pitch P in the longitudinal direction of the magnetic body 2. The magnetic wire 2 on which magnetic writing was performed has the eighth
As shown in the figure, magnetic sensors 3 are fixed at a distance g2 . Now, as shown by the arrow in Figure 1, stick body 1
When the magnetic sensor 3 moves back and forth, an output corresponding to the writing pitch is obtained from the magnetic sensor 3, and this output is subjected to circuit arithmetic processing to detect the precise position.
ここで従来第６図に示すよう棒体１は所要の径
D1より直径で0.3〜0.4mm程度大なる径D0に荒加工
し、外周の一部に長手方向に溝５を加工しこの中
に磁性線２を埋め込み、第７図のように磁性線２
の一部が露出するように精密研削加工が行なわれ
て形成されている。 Conventionally, as shown in Fig. 6, the rod 1 has a required diameter.
Roughly machine the diameter D 0 , which is about 0.3 to 0.4 mm larger in diameter than D 1 , cut a groove 5 in the longitudinal direction on a part of the outer periphery, embed the magnetic wire 2 in this, and insert the magnetic wire 2 as shown in Fig. 2
It is formed by precision grinding so that a part of it is exposed.
この精密研削加工の精度は全長にわたり±５〜
±10ミクロンメータは必要であり、前処理を含み
加工費も高価となり、また異種金属の間の円筒研
削加工であり、磁性線２にひび割れが発生しやす
く歩留りが悪い欠点がある。また磁気センサ３に
引き出し用線材３２を固定するため第８図のよう
に突出部３１が通常0.3〜0.5mm程度の高さｄがあ
るので間隔寸法g2を接近できず100マイクロメー
タ前後の間隔があり、出力電圧が充分に得られな
い欠点がある。
The accuracy of this precision grinding process is ±5 to ±5 over the entire length.
A ±10 micron meter is required, and the processing cost including pre-treatment is expensive, and since it is a cylindrical grinding process between dissimilar metals, the magnetic wire 2 is prone to cracking, resulting in a poor yield. In addition, in order to fix the drawing wire 32 to the magnetic sensor 3, as shown in Fig. 8, the protruding portion 31 usually has a height d of about 0.3 to 0.5 mm, so the spacing dimension g 2 cannot be approached, so the spacing is around 100 micrometers. However, there is a drawback that a sufficient output voltage cannot be obtained.
本考案は従来のかかる欠点を除き、非磁性材よ
りなる円柱状の棒体１の外周の一部に軸方向に埋
め込まれ軸方向に所定のピツチで磁化された強磁
性材よりなる磁性線２に磁気センサ３を接近して
設けてなる磁気リニアスケールにおいて、外周表
面の一部が全長にわたり軸方向に平面加工された
平面部分に磁性線２を添設してなる棒体１を具備
する磁気リニアスケールである。
The present invention eliminates such drawbacks of the conventional method and provides magnetic wires 2 made of a ferromagnetic material that are embedded in a part of the outer periphery of a cylindrical rod 1 made of a non-magnetic material in the axial direction and magnetized at a predetermined pitch in the axial direction. In a magnetic linear scale, a magnetic linear scale is provided with a magnetic sensor 3 close to the magnetic linear scale, which includes a rod 1 having a magnetic wire 2 attached to a flat part of the outer circumferential surface of which is flattened in the axial direction over the entire length. It is a linear scale.
棒体１の一部の平面部分より磁性体２が突出さ
れているので磁気センサ３を充分接近させること
ができる。
Since the magnetic body 2 protrudes from a part of the planar portion of the rod 1, the magnetic sensor 3 can be brought sufficiently close to the rod 1.
本考案の磁気リニアスケールの実施例は第１図
に示すようにステンレスなどの非磁性材よりなり
外側面の一部を軸方向に平面加工された棒体１の
中央に軸方向に強磁性体よりなる磁性線２を添設
し両端を軸受４で保持され、さらに磁性線２に接
近して磁気センサ３が配設されて磁気リニアスケ
ールが形成されている。すなわち棒体１は第２図
の断面図に示すように、あらかじめ所要の直径
D1に外径を精密研削し、さらに側面を、軸方向
に平面部１１とその中央に溝５を加工する。この
溝５の中に強磁性材よりなる断面円形の磁性体２
を埋込み固定するが、溝５は磁性体２の外側突出
部が外径D1の寸法より100〜20ミクロンメータ程
度のａの寸法とする。
As shown in Fig. 1, the embodiment of the magnetic linear scale of the present invention is a rod body 1 made of a non-magnetic material such as stainless steel, with a part of the outer surface machined to be flat in the axial direction, and a ferromagnetic material in the center of the rod body 1, which is made of a non-magnetic material such as stainless steel. A magnetic wire 2 is attached, both ends of which are held by bearings 4, and a magnetic sensor 3 is disposed close to the magnetic wire 2 to form a magnetic linear scale. That is, as shown in the cross-sectional view of Fig. 2, the rod 1 has a predetermined diameter.
The outer diameter is precisely ground to D1 , and the side surface is machined to form a flat part 11 in the axial direction and a groove 5 in the center thereof. A magnetic body 2 with a circular cross section made of ferromagnetic material is placed in this groove 5.
is embedded and fixed, and the groove 5 has a dimension a of about 100 to 20 micrometers from the outer diameter D1 of the outer protrusion of the magnetic body 2.
したがつて棒体１は外径D1に対応した軸受４
に容易に保持装着され磁性体２は棒体１に接着固
定され、ピツチ間隔Ｐにて磁化書き込みが行なわ
れる。また磁性線２上に近接して第３図のよう
に、引き出し線用線材３２を固定しているので高
さｄの寸法だけの突出部３１が突出する磁気セン
サ３が突出部３１を磁性線２に向けて固定され
る。したがつて第４図の断面図のように磁性線２
と磁気センサ３との間の間隔g1を狭くしても突出
部３１は平面部１１上にあるので突出部３１は棒
体１と接することがない。 Therefore, the rod 1 has a bearing 4 corresponding to the outer diameter D 1 .
The magnetic body 2 is easily held and attached to the rod body 1, and the magnetic body 2 is adhesively fixed to the rod body 1, and magnetization writing is performed at pitch intervals P. In addition, as shown in FIG. 3, the lead wire wire 32 is fixed close to the magnetic wire 2, so that the magnetic sensor 3 with the protruding portion 31 of the height d protrudes can move the protruding portion 31 from the magnetic wire. Fixed towards 2. Therefore, as shown in the cross-sectional view of Fig. 4, the magnetic wire 2
Even if the distance g 1 between the magnetic sensor 3 and the magnetic sensor 3 is narrowed, the protrusion 31 will not come into contact with the rod 1 because the protrusion 31 is on the flat surface 11 .
いま固定されている磁気センサ３に対して棒体
１を第１図の矢印のように往復運動させると書き
込みされた磁化のピツチＰに対応した出力が磁気
センサ３より得られる。 When the rod 1 is reciprocated in the direction of the arrow in FIG. 1 relative to the currently fixed magnetic sensor 3, an output corresponding to the written magnetization pitch P is obtained from the magnetic sensor 3.
以上に述べたように本考案によれば、棒体１の
側面を平面部１１を設けることにより磁気センサ
３と磁性体２との間隔g1は従来の間隔g2より小と
することができ磁気センサ３からの出力電圧を大
きくすることができる。
As described above, according to the present invention, the distance g 1 between the magnetic sensor 3 and the magnetic body 2 can be made smaller than the conventional distance g 2 by providing the flat portion 11 on the side surface of the rod 1. The output voltage from the magnetic sensor 3 can be increased.
第１図は本考案の磁気リニアスケールの実施例
の外観斜視図、第２図は本考案による棒体の縦断
側面図、第３図は本考案に用いられる磁気センサ
のセンサ面より見た外観斜視図、第４図は本考案
による磁気リニアスケールの縦断側面図、第５図
は従来の磁気リニアスケールの例の外観斜視図、
第６図は従来の棒体の荒加工に磁性体を埋め込ん
だ縦断側面図、第７図は第６図の棒体に精密加工
を行なつた縦断側面図、第８図は従来の磁気リニ
アスケールの例の外観斜視図である。
なお、１……棒体、２……磁性線、３……磁性
センサ、４……軸受、５……溝、１１……平面部
分。
Fig. 1 is an external perspective view of an embodiment of the magnetic linear scale of the present invention, Fig. 2 is a longitudinal cross-sectional side view of the rod according to the invention, and Fig. 3 is an external appearance of the magnetic sensor used in the invention as seen from the sensor surface. A perspective view, FIG. 4 is a vertical side view of the magnetic linear scale according to the present invention, and FIG. 5 is an external perspective view of an example of a conventional magnetic linear scale.
Figure 6 is a vertical side view of a conventional rod body with magnetic material embedded in rough machining, Figure 7 is a vertical side view of a rod body in Figure 6 that has been precisely machined, and Figure 8 is a conventional magnetic linear FIG. 3 is an external perspective view of an example of a scale. Note that 1...rod, 2...magnetic wire, 3...magnetic sensor, 4...bearing, 5...groove, 11...plane portion.
Claims (1)
方向に埋め込まれ、軸方向に所定のピツチで磁化
された強磁性材よりなる磁性線２に磁気センサ３
を近接して設けた磁気リニアスケールであつて、
該磁気センサ３が、前記磁性線２の磁化のピツチ
に対応した出力を得るための引き出し用線材３２
と、該引き出し用線材３２を固定するための突起
部３１とを備えた磁気リニアスケールにおいて、
前記棒体１の外周の一部に軸方向の全長にわたつ
て平坦な平面部分１１を設け、該平面部分１１に
は軸方向に前記磁性線２を埋め込むための溝５を
設け、該溝５の深さを前記磁性線２の一部が前記
平面部分１１から突出するようにし、且つ、前記
突起部３１を該溝５を除く平面部分１１と対向す
る位置に配置したことを特徴とする磁気リニアス
ケール。 A magnetic sensor 3 is attached to a magnetic wire 2 made of a ferromagnetic material that is embedded in a part of the outer periphery of a columnar rod 1 made of non-magnetic material in the axial direction and magnetized at a predetermined pitch in the axial direction.
A magnetic linear scale provided in close proximity to each other,
A drawing wire 32 for the magnetic sensor 3 to obtain an output corresponding to the magnetization pitch of the magnetic wire 2.
and a protrusion 31 for fixing the drawing wire 32,
A flat planar portion 11 is provided on a part of the outer circumference of the rod 1 over the entire length in the axial direction, and a groove 5 for embedding the magnetic wire 2 in the axial direction is provided in the planar portion 11. The depth of the magnetic wire 2 is set such that a part of the magnetic wire 2 protrudes from the flat portion 11, and the protruding portion 31 is disposed at a position facing the flat portion 11 excluding the groove 5. linear scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985151461U JPH0531521Y2 (en) | 1985-10-04 | 1985-10-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985151461U JPH0531521Y2 (en) | 1985-10-04 | 1985-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6259805U JPS6259805U (en) | 1987-04-14 |
| JPH0531521Y2 true JPH0531521Y2 (en) | 1993-08-13 |
Family
ID=31068550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985151461U Expired - Lifetime JPH0531521Y2 (en) | 1985-10-04 | 1985-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0531521Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58105012A (en) * | 1981-12-17 | 1983-06-22 | Nec Corp | Magnetic scale and manufacture thereof |
| JPS59197367A (en) * | 1983-04-26 | 1984-11-08 | Ube Ind Ltd | Displacement detector of ram in die casting machine |
-
1985
- 1985-10-04 JP JP1985151461U patent/JPH0531521Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58105012A (en) * | 1981-12-17 | 1983-06-22 | Nec Corp | Magnetic scale and manufacture thereof |
| JPS59197367A (en) * | 1983-04-26 | 1984-11-08 | Ube Ind Ltd | Displacement detector of ram in die casting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6259805U (en) | 1987-04-14 |
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