| 摘要 |
PURPOSE:To reduce the load of a chuck mounting shaft imposed on a main shaft housing so as to lessen a cam follower in abrasion by a method wherein a part holder mounting shaft is rotated with the rotation of a rotary frame actuated by a rotating main shaft. CONSTITUTION:A rotary frame 24 is rotated by a rotating main shaft 27, and a part holder mounting shaft 26 is rotated with them. Accompanying the rotation of the part holder mounting shaft 26, a cam follower 42 rolls along the cam groove 44 as t is pressed against the one side of a cam groove 44 by an energizing means, and the part holder mounting shaft 26 is moved inn its axial direction. In this case, the cam follower 42 of the part holder mounting shaft, 26 equipped with a part holder 9 is engaged with the cam groove 44 through the intermediary of a slide bearing 25, and the part holder mounting shaft 26 is supported by an energizing means, so that loads imposed on a main shaft housing 30 by the part holder mounting shaft 26 can be lessened. |
