| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify the structure for elevating a turntable and to reduce the cost by rotating a turntable shaft by the driving force of a first motor via a gear, and elevating a turntable shaft by transmitting the driving force of a second motor to a rotary cam. SOLUTION: The turntable shaft 70 provided at the bottom of a heating chamber 2 to rotate a turntable is rotated via gears 211, 209 by the drive of a motor 207. In an initial standby state, when the lowering to the lowest position of the shaft 70 is sensed, a rotary cam 221 is rotated by the driven of a motor 215 via a gear 217, and when the height of the oblique part 221b formed on the upper surface of the cam 221 is varied, the shaft 70 is slid via the semipherical oblique track surface 211 c formed on the oblique part 211b and repeatedly elevated.</p> |
