JPS5935819U

JPS5935819U - magnetic scale

Info

Publication number: JPS5935819U
Application number: JP13172482U
Authority: JP
Inventors: 加藤　由人; 橋本　利夫; 大久保　浩之; 潤一佐野; 長「淵」　真介
Original assignee: トヨタ自動車株式会社; ソニ−マグネスケ−ル株式会社
Priority date: 1982-08-31
Filing date: 1982-08-31
Publication date: 1984-03-06

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、従来の磁気スケールの平面図、第２図は、従
来の磁気スケールの縦断正面図、第３図は、工作機械に
おけるツールとワークとの相対位置を示す説明図、第４
図は、本考案の第１実施例のスケールベースを示す平面
図、第５図は、同じく第２実施例のスケールベースを示
す平面図、第６図ａ、　　ｂ、　　ｃは、上記第２実施
例の各部の信号波形を示す線図、第７図は、本考案の第
３実施例のスケールベースを示す平面図、第８図は、上
記第３実施例の各部の信号波形を示す線図、第９図は、
本考案の第４実施例のスケールベースを示す平面図であ
る。１・・・スケールベース、３・・・測尺用発磁体、６・
・・ヘッドケース、１０・・・基準点発磁体、１２・・
・中間基準点発磁体、１４・・・検出ヘッド、１６・・
・検出回路。Fig. 1 is a plan view of a conventional magnetic scale, Fig. 2 is a longitudinal sectional front view of a conventional magnetic scale, Fig. 3 is an explanatory diagram showing the relative positions of a tool and a workpiece in a machine tool, and Fig. 4 is an explanatory diagram showing the relative positions of a tool and a workpiece in a machine tool.
The figure is a plan view showing the scale base of the first embodiment of the present invention, FIG. 5 is a plan view showing the scale base of the second embodiment, and FIGS. FIG. 7 is a plan view showing the scale base of the third embodiment of the present invention; FIG. 8 is a diagram showing the signal waveforms of each part of the third embodiment of the present invention. , Figure 9 is
FIG. 7 is a plan view showing a scale base according to a fourth embodiment of the present invention. 1...Scale base, 3...Magnetic body for measurement, 6.
...Head case, 10...Reference point magnetizing body, 12...
・Intermediate reference point magnetizing body, 14...Detection head, 16...
・Detection circuit.

Claims

[Claims for Utility Model Registration] (1) A measuring rod fixed to a part of the surface of a scale base so as to extend a predetermined length from near one end of the scale base toward the middle of the scale base. a magnetic body, a reference point magnetizer fixed near the other end on the surface of the scale base; a fixed intermediate reference point magnetizing body; a detection head that moves on the surface of the scale base to detect the magnetic field generated by each magnetizing body and outputs a magnetic field signal; and a detection head corresponding to the intermediate reference point magnetizing body. A magnetic scale comprising: a detection circuit including a counter that counts magnetic field signals corresponding to the measuring magnetic body based on a magnetic field signal and outputs a position signal. '(2) On the surface of the scale base! A 1,000 measuring scale track and a reference point track are formed in parallel to fix the measuring scale magnet on the measuring track, and the reference point magnetizing body and the intermediate reference point magnetizing body are set as a reference. fixed on the point track,
The magnetic scale according to claim 1, wherein the detection head is constituted by a measurement detection head that moves on the measurement track and a reference point detection head that moves on the reference point track. . (3) The magnetic scale according to claim 1 or 2, wherein the strength of the magnetic field is different between the reference point magnetizing body and the intermediate reference point magnetizing body. (4) The magnetic scale according to claim 1 or 2, wherein the reference point magnetizing body and the intermediate reference point magnetizing body are formed of an integrated magnetic recording medium. (5) The magnetic scale according to any one of claims 1 to 4, wherein the surface of the scale base on which each magnetizing body is fixed is covered with a uniform non-magnetic sheet. (6) The magnetism according to any one of claims 1 to 5, which closes the gate of the counter when the detection head no longer detects the magnetic field corresponding to the measuring magnet. scale.