| 摘要 |
A contact block ( 31 ) is provided with a flat face portion ( 311 A) parallel with the axis of a spindle ( 12 ) and a conical face portion ( 311 B) that comes closer to the flat face portion ( 311 A) along the axial direction of the spindle ( 12 ) in the direction of going away from the spindle ( 12 ). Even in the case of a shape formed by integrating a step and a gap inseparably, since the flat face portion ( 311 A) is parallel with the axis of the spindle ( 12 ), it is possible to insert the contact block ( 31 ) into the gap while the axis of the spindle ( 12 ) is kept perpendicular to the direction of the gap, hence it is possible to measure the gap W accordingly.
|
