| 摘要 |
PURPOSE:To provide a slidably detecting shaft connected with a balance weight through a hanging yarn to the slidable shaft for a shape measuring instrument by employing an elevationally slidable shaft and digitally detecting the movement of the slidable shaft. CONSTITUTION:A gear motor 65 is driven to elevationally move an angular shaft 36 upward or downward to thereby carry an article to be measured between a measuring stylus 49 and a tray. Then, a guide cylinder 69 is lowered to its lowermost position by a gear motor 65 in a detecting head 21. When a lower table is horizontally driven, the stylus 49 measured the predetermined sectional shape of the article while elevationally moving along the rugged surface of the article. The angular shaft 36 is supported via a pneumatic bearing to a guide block 34, and a hanging yarn is engaged with pulleys 52, 53 which are also supported via pneuntiic bearings to balance the most weight of the shaft 36 with the weight 54. Optical means reads the movement of a table and the shaft 36 according to the movement of a linear scale and index scale.
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