| 摘要 |
<p>Provided are: a double grasping mechanism including a double grasped part and a double gripping mechanism; a spindle, a holder holding mechanism, a main-spindle, and a holder holding device each including a double gripping mechanism; and a tool holder; a chuck holder; and a clamp holder. The double grasped part is formed by an outer pull stud (11) and an inner pull stud (22/32/42/55). The double gripping mechanism is formed by: an outer gripping mechanism including an outer large-diameter part (90e), an outer small-diameter part (90g), an outer draw bar (85), and outer balls (92a); and an inner gripping mechanism including an inner large-diameter part (85b), an inner small-diameter part (85c), an inner draw bar (84), and inner balls (92b). The tool holder (2a/2b/2c) includes the outer pull stud (11). The chuck holder (6a/6b/6c/6d) includes the outer pull stud (11) and the inner pull stud (22/32). The clamp holder (8a/8b) includes the outer pull stud (11) and the inner pull stud (42/55).</p> |
