| 摘要 |
PROBLEM TO BE SOLVED: To measure the perpendicularity at the end of a pin having a microdiameter being used as a gauge pin quickly, accurately and inexpensively. SOLUTION: The end face P2 of a columnar pin P is abutted against a stopper 30 while applying a rotational force to the circumferential side face P1 thereof and displacement of the end face P2 of the turning pin P from the center is measured by means of a displacement sensor L. Perpendicularity of the end face P2 of the pin P is then measured based on the displacement. The measuring apparatus comprises a base 10 for supporting the circumferential side face P1 of the columnar pin P, a rotary belt 20 for imparting a rotational force to the pin P by coming into pressure contact with an upper part of the circumferential side face P1 of the pin P supported horizontally on the supporting base 10, a stopper 30 abutting against the end face P2 of the turning pin P, and a sensor L for measuring the displacement of the end face P2 of the turning pin P from the center.
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