| 摘要 |
<p>In order to solve, at low cost, the problem that a heavy turning body causes a positional displacement during turning due to the reversal of a backlash, a drive method for a turning device (12) for turning a heavy turning body beyond a vertical position comprises: a first drive step in which a first motor (24), a first drive system (34) which is driven by the first motor (24), a second motor (28), a second drive system (36) which is driven by the second motor (28), and a common bevel gear (32) to which the powers of the first drive system (34) and the second drive system (36) are simultaneously transmitted are provided, and a turning shaft (22) of the turning body is driven by the first motor (24) and the second motor (28) from the starting point of the turning of the turning device (12) to a specified turning angle (theta1); and a second drive step in which from the specified angle (theta1), the first and/or the second motor (24, 28) is changed to a different drive form to drive the turning shaft (22).</p> |
