Self-climbing structure, for inspection and maintenance and repair at smooth masts, has a platform frame and a climbing frame with alternating movements between them to climb up the mast

摘要

The self-climbing structure at a mast (C) and the like has a platform frame (A) and a climbing frame (B). The frames are composed of a number of interlocked climbing cylinders (5) to prevent a vertical sliding movement. The climbing action on the mast is through an alternating clamping and lifting action by lifters (4) between the two frames with at least one cross member (2) sliding against another cross member. The control unit is a block (7) on the climbing frame. A working platform (1) is supported by the platform frame.