| 摘要 |
PURPOSE:To improve the accuracy of alignment without folded flaw of a disc, by providing a collet implanted on a device frame opposing to a disc support member to a member guiding vertical movement to the disc support. CONSTITUTION:The collet support member 30 being a device frame mounting a collet guide member 31 is provided and fixed to a position opposing to a disc support member 25 having a collet boss 25-1. Further, a collet slide member 31 is provided, and the disc 24 is aligned and clamped by the vertical movement with a pressing member 21 and moving a collet slide member 32 linked to a collet operating member 28 taking the said collet slide member 31 as a guide. Thus, folded flaw of the disc is eliminated and the accuracy of alignment is improved. |
