| 摘要 |
A turning device includes a brake disc, functioning as a driven-side friction pulley, which is disposed on an output shaft of a gearbox and rotates together with the output shaft; a motor-side friction pulley, which can move between an engagement position, where the motor-side friction pulley frictionally engages with an outer circumferential surface of the brake disc, and a free position, where the motor-side friction pulley is a certain distance away from the outer circumferential surface of the brake disc; a pulley pressing mechanism, which moves the motor-side friction pulley from the free position to the engagement position by manual power of an operator to frictionally engage the motor-side friction pulley with the outer circumferential surface of the brake disc; and pulley driving means (electric motor, etc.) for rotationally driving the motor-side friction pulley.
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