TELESCOPIC MAST WITH BUILT-IN SAFETY DEVICE FOR LIFTING APPARATUS, AND LIFTING APPARATUS PROVIDED WITH SUCH A TELESCOPIC MAST

摘要

the telescopic mast (1) includes a body (7) attached to a security element (6) and traction mounted pivoted about an axis (8), the security officer (7) is able to be maintained by the traction element (6) is in a neutral position and to be pivoted. in case of failure the traction element (6), in the background of an elastic body (9) in a safe position.the security body (7) comprising at least two teeth (11) extending longitudinally with different lengths and in which at least one of the teeth (11) is able to be anchored in the safe position, the thickness of the inner wall of the tubular frame (5).;according to the invention, the security body (7) is a metal piece, comprising two parallel shaped wings extending longitudinally (7d), the teeth (11) is provided on one of the ends of the wings (7d).