Working device with stationary boom and rotary head

Abstract

A working device has a base designed as a stationary support column, a motor-driven rotary head and a stack of arms made up of several mast arms which can be moved with respect to each other in pairs, using articulated or sliding joints, supporting a concrete transport line. The stack of arms is articulated on the rotary head about a horizontal rotational axis by a first mast arm. The working device also includes a control mechanism which can be actuated by a control element or a radio path and which is arranged in a control box, and a hydraulic assembly including an oil tank and a motor-driven hydraulic pump for controlling working groups for moving the rotary head and mast arm. A working platform fixed with respect to the base is arranged in the region of the bearing block for emergency operations. In order to ensure that the components required for actuating the stack of arms are not in the way of the engine in the event of an emergency operation, the control box with the control mechanism and the hydraulic assembly with the oil tank and hydraulic pump are arranged on the rotary head above the bearing block.