ROLLER-SUPPORTED OVERHEAD-TRAVELLING CRANE FOR CONTAINER YARDS AND AGRICULTURAL PLANTATIONS Russian patent published in 1994 - IPC

FIELD: load-handling machinery. SUBSTANCE: roller-supported overhead-travelling crane for container yards of railway stations and agricultural plantations comprises bridge, load-hoisting device with drive, operator's cab with control instruments, crane bridge drive mechanism, drive proper, and electric power supply system of load-hoisting device and of bridge propelling drive which are powered through flexible electric cable laid along one of two overhead tracks and wound on special drum installed on crane bridge. Crane is made without crane tracks and uprights. The function of crane tracks is fulfilled by individual pillars whose heads or cantilever arms carry support-and-drive rollers. Crossbar is a closed-contour frame, rectangular in plan, serving as additional bridge. Main girders of bridge have the form of a three-dimensional structure of triangular cross section. End girders of bridge have a rigid lower chord with rails resting on support-and-drive rollers of pillars. Cantilever arms of the bridge main girders carry the track of the crane whose trolley is designed to suit the crane application. EFFECT: improved design. 2 dwg