Rotating tower crane, in tower sections, has a traverse and support shoe with hydraulic piston/cylinder units to raise a section for the insertion of a new section to increase the crane height

摘要

The assembly to increase the height of a rotating tower crane (10), by raising the tower sections (12) to leave space for the insertion of an added tower section (12'), has a cross traverse (22) connected to the guide piece (16) by a hydraulic piston/cylinder unit, and a support shoe (24). A hydraulic piston/cylinder setting unit (26) is between the traverse and the shoe.