| 摘要 |
PURPOSE:To accurately measure the dimension of an object to be measured having a circular or oval cross-sectional shape, by holding the object to be measured by a holding means having comb-shaped gaps and inserting a dimension detection part in said gaps to detect displacement. CONSTITUTION:The apparatus is constituted of a support jig 4 having a comb-shaped V-groove 1 and the contact elements 6a, 6b of a displacement sensor. The wall surfaces 8a, 8b separated by the gaps 2a, 2b of the groove V cross the wall surfaces 9a, 9b separated by a gap 3 at a right angle. An object 5 to be measured is placed on the groove 1 and the contact element 6a is inserted from the gap 2b to be pressed to the object 5 to be measured and, thereafter, the contact element 6b is inserted from the gap 6b to be pressed to the object 5 to be measured to measure the displacement of the object 5 to be measured. The short diameter D1 and long diameter D2 of the object 5 to be measured are respectively set on the basis of the walls 9b, 8b to measure displacement. By this apparatus, the generation of the mechanical interference of the contact elements or the erroneous confirmation of a circle can be prevented and the dimension of the object to be measured having a circular or oval cross-sectional shape is accurately measured.
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