| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint piece manufacturing apparatus which not only improves machining accuracy but also reduces machining time by preventing a delay of rotations taking place on a rotary tool rotated by a motor. SOLUTION: A motor part 51 for rotation comprises both a stator 55 and a rotor 56 constituting a motor part 54 and both a chuck nail 58a and a body 58b of the chuck constituting a chuck mechanism part 52. The rotor 56 is a rotating body disposed in the stator 55. The chuck body 58b is integrally fixed to the rotor 56 concentrically through a rotating shaft rotor 57, and is placed on a tip end surface of the rotating shaft rotor 57. In the motor part 51 for rotation, the central axis of a pipe member 10 held by the chuck mechanism part 52 coincides with the central axis of the motor part 51. Since the rotor 56, the rotating shaft rotor 57, and the chuck mechanism part 52 are directly connected, the rotation of the rotor 56 is directly transmitted to the chuck mechanism part 52. COPYRIGHT: (C)2006,JPO&NCIPI
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