| 摘要 |
PURPOSE:To aim at such polishing as being excellent in followability of a work against a swell on a polishing surface, by installing a link, which connects both holding and supporting parts free of tilt motion and makes each extension of three shaft centers pass through one point on a work surface, and a joint being displaceable to a shaft and the orthogonal direction. CONSTITUTION:When a flange 32 is clamped, a pressing plate 34 and a blank 20 tilt centering on a center (c) within a minute range, and in this minute range, since a link 33 tilts centering on its one end 37, the other end 37 is displaceed on a flat surface right-angled with a shaft center (a) so that the center of rotational motion of the pressing plate 34 is on the shaft center (a), and this center is produced as to three links 33, whereby the pressing plate tilts centering on the center (c) or an intersection point of the shaft center (a). In addition, displacement is allowed to the vertical and plane surface directions between both holding and supporting parts, while a joint 41 being solidly connected to a direction of rotation is interposingly installed, following a surface form of the blank 20 and keeping off rotation of the pressing plate 34. Therefore, the pressing plate 34 and the blank 20 tilt centering on the center (c) according to a swell on a polishing surface, thus any slip on a work surface due to the tilt is in no case produced. |
