Patent ID: 7689299
Filing Date: 2010-03-30
Classification: B23Q

Abstract:
1. A rotary work lifter characterized in a rotary work lifter having a drive source an operation of which is controlled by a drive source control portion, driven by the drive source and enabling to carry a work mounted on a working table, said rotary work lifter comprising: position detecting means for detecting a rotational position of the rotary work lifter; a position determining portion for determining whether the rotary work lifter reaches a predetermined position by position information detected by the position detecting means; speed detecting means for detecting a rotational speed of the rotary work lifter; and a speed determining portion for outputting a signal of stopping the rotary work lifter to the drive source control portion when a speed of the rotary work lifter becomes equal to or smaller than a predetermined speed by speed information detected by the speed detecting means.