LIFTING AUXILIARY MACHINE

PURPOSE: To reduce labor needed for ascending and descending and to improve safety by mounting a self-propelled lifting auxiliary machine, which moves along a rail, to a ladder for entering and leaving a very deep shaft or the like to cause the machine to hold most of the weight of an operator. CONSTITUTION: A charging battery, a motor, a bumper, a collision prevention mechanism, a load limiter, a switch etc., are set in a lifting auxiliary machine 1, which ascends and descends along a rail fixed to a ladder 111 to give a self-propelling function to the machine, in which manual operation and automated operation can be changed over to each other. When an operator climbs the ladder, a rope 114 of a safety belt 113 of the operator is hung on a hook of the machine 1 and a switch is turned on to lift the machine 1 so that the operator climbs the ladder, while most of his weight is being supported by the machine 1. When the operator climbs backward down the ladder, his weight is supported in a similar manner. In this case, when the operator slides down or an object gets into the machine 1, the load limiter acts to stop the machine. As a result, load on the operator can be reduced.