| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a plurality of pin parts in a crank shaft at a hardening position from the collision with a coil unit fixed at the initial position for receiving a work, and to prevent the development of adverse effect caused by the inclination of the coil unit sideward at the initial position. SOLUTION: Coil units 20a, 20b, 20c are supported with an active type hang- down frame 50. The active type hang-down frame 50 is provided with a crank mechanism 51 having substantially the same specification as the crank shaft 10 set at the hardening position. The crank mechanism 51 hangs down the coil units 20a, 20b, 20c so as to be freely rotatable with a plurality of pin parts 51a, 51b, 51c, thereof, and is synchronously driven in the same phase with the crank shaft 10.</p> |
