| 摘要 |
PURPOSE:To enhance the measuring efficiency by allowing a hole-equipped circular work to be located easily, and providing measurability for the roundness of the inside dia. of the work. CONSTITUTION:In the body 42 of a jig capable of placing on a table 32, a hole 42B is provided in the direction perpendicular to the table 32, and a piston 44 is furnished in this hole movably. The top 44A of the piston 44 is formed conically, which makes movement between the position where it is fitted in the bore 50A of a hole-equipped circular disc 50, placed on the measuring surface 42A, to make its location and the position as retreated from this locational position. A plate cam 46 moves the piston 44 between the positions where the disc 50 is located and retreated. |
