| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a spindle, a holder retaining mechanism, a main shaft, and a holder retaining apparatus having a double holding mechanism and a double gripping mechanism composed of a double holding part and a double gripping mechanism, and a tool holder, a chuck holder and a clamp holder. <P>SOLUTION: The double holding part is composed of an outer pull stud 11 and inner pull studs 22, 32, 42, 55. The double gripping mechanism is composed of an outer gripping mechanism including an outer large-diameter portion 90e, an outer small-diameter portion 90g, an outer draw bar 85 and an outer ball 92a and an inner gripping mechanism including an inner large-diameter portion 85b, an inner small-diameter portion 85c, an inner draw bar 84 and an inner ball 92b. In addition, there are provided tool holders 2a-2c having the outer pull stud 11, chuck holders 6a-6d having the outer pull stud 11 and the inner pull studs 22, 32 and clamp holders 8a, 8b having the outer pull stud 11 and the inner pull studs 42, 55. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
