| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a plurality of pin parts in a crank shaft carried into 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 hung down and supported so as to be possible to follow in two directions of the perpendicular direction and the orthogonally horizontal direction to the center line of the crank shaft 10 with a following type hang-down frame 30. Connecting position between the coil unit 20a, 20b, 20c and the hang-down frame 30, is made different in the orthogonally horizontal direction to the center line of the crank shaft 10 accoding to a phase angles of the pin parts 11, 12, 13 so that plural pin parts 11, 12, 13 in the crank shaft 10 carried in the hardening position and the coil units 20a, 20b, 20c fixed to the initial position align the position in the orthogonally horizontal direction to the center line of the crank shaft 10.</p> |
