| 摘要 |
PROBLEM TO BE SOLVED: To easily execute centering of a ceramic product, the inner peripheral surface of which is circular and, the outer peripheral surface of which is non- circular. SOLUTION: After a ceramic product W is placed on a table 12, a rotating shaft 14 equipped with three pressors 26 is lowered inside the ceramic product W so as to rotate the rotating shaft 14 and displace the pressors 26 towards the inside of the ceramic product W. Under the state that the pressors 26 are pushed against the inner peripheral surface, the product W is moved on the table 12. Thus, the centering of the product W can be executed.
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