TOWER CRANE TOP PILLAR Russian patent published in 2009 - IPC B66C23/00 B66C23/26 

FIELD: construction, equipment.

SUBSTANCE: invention concerns the load-lifting equipment, in particular the tower cranes. The pillar comprises chords with rigidly connected to them bracing and struts, upper and lower girders forming the bearing metal framework, ladder fixed on one side of the pillar and oriented along the pillar. The upper girder with eye lugs is E-shaped with the hoist cable blocks fixed on the vertical ends and boom sheave blocks fixed on the middle vertical part of the girder and one of its vertical ends. In the pillar bottom, there is an opening for the spring stop of the crane top, wherein the opening is formed by lower struts connected to the lower girder and the lower ends of the pillar chords, the ladder in the pillar bottom is shifted from the pillar center line and forms together with the other part of the ladder a horizontal step located in the plane of the lower girder of the pillar. The pillar and ladder are inclined to the back of the crane, the pillar ladder is between the sloping side of the pillar and the tower frame.

EFFECT: improved flexibility and compact size of the pillar, uniform load distribution along the crane tower frame and increased safety.

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