| 摘要 |
PROBLEM TO BE SOLVED: To simply adjust a tool cutting blade 18 in the radial direction. SOLUTION: A tool holder is divided into a basic body 14 supported rotatably around a rotary shaft 24 by a first bearing 40 in a taking body sleeve 44 and a tool holder body 16 supported rotatably around an eccentric shaft 42 positioned eccentrically and in parallel for the rotary shaft 24 by a second bearing 38 in the taking body sleeve 44. At this time, the taking body sleeve 44 can rotate around the rotary shaft 24, the rotary shaft 24 and the eccentric shaft 42 are positioned on a guide line 52, and the tool holder body 16 and the basic body 14 are mutually connected to prevent their rotation through guide parts 48, 50 in the radial direction and slide along the guide line 52. An interval between the tool holder body 16 and the basic body 14, namely, an interval between the rotary shaft 24 and the eccentric shaft 42 is changed by the movement of the taking body sleeve 44 centered on the rotary shaft 24. |
