| 摘要 |
PURPOSE:To facilitate changing a grinding wheel to improve the contact of it with an article to be worked. CONSTITUTION:A grinding wheel holder 9 holding a grinding wheel 8 is rotated integratedly with the rotation of a rotation head 4 to perform polishing by the grinding wheel 8. Changing the grinding wheel holder 9 can be simplified by making it have structure wherein a shaft part 9b is inserted into a fitting cylinder 20 to be fitted to the rotation head 4. A circular cone-shaped cam member 17 is fitted to a vertically moving shaft 15 to concurrently push out all the grinding holder 9 by the cam member 17 to contact the grinding wheel 8 with an article to be worked. Continuous pushing force by the cam member 17 well contacts the grinding wheel 8 with the article to be worked. |
