BALANCED CARGO GEAR

PURPOSE: To immediately stop a work and to simplify the restarting by switching a mode switching circuit to an abnormal mode side on the basis of the signals from a load detecting means, a speed detecting means and a speed instructing means when the abnormality such as the sudden change of the load or the like is detected. CONSTITUTION: When the load acting on a work 5 is suddenly changed, the operation is performed by a judging circuit for abnormal mode on the basis of the signals from a load detecting means 7, a speed detecting means 4 and a speed instructing means 8. A mode switching circuit 22 is switched to an abnormal mode side on the basis of an output signal from the judging circuit. Then an instructing signal is output to a driving means from an abnormal mode arithmetic portion 21 of an arithmetic circuit, whereby the driving means 2 is stopped to stop the work 5 at that position. As mentioned in the above, the work 5 can be stopped at that position without shaking the same after the detection of the abnormality such as the sudden change of the load, and the driving means can be restarted only by the operation of a lever to continue the ordinary operation.