| 摘要 |
PROBLEM TO BE SOLVED: To provide loader chucks of many kinds at a low cost. SOLUTION: Multiple drive pieces 6 are provided on one side face of a chuck main body 3 movably in the radial direction against the axis of the chuck main body 3, and a piece moving device 40 synchronously moving the drive pieces 6 in the radial direction is provided in the chuck main body 3. A fitting plate 17 facing one side face of the chuck main body 3 is provided, and the drive pieces 6 and driven pieces 18 releasable from the axial direction of the chuck main body 3 are provided on the fitting plate 17 movably in the radial direction. Pawls 19 holding a work on the driven pieces 18 are provided, and connecting devices 30 connecting the fitting plate 17 to one side face of the chuck main body 3 releasably from the axial direction are provided.
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