self-braking cable security against the direction of.

摘要

A safety device 10 for rope self-locking includes two pulleys 12, 14, one 12 is fixed on a base flange 18, and the other 14 on a support plate 30 is capable of pivoting about an axis of articulation 32. The pulley 12 is provided with a first braking surface 28 against which the rope is pressed 26 by a projection 36 of the pulley 14 when the support plate 30 is driven by the voltage of the rope to a first locking position. The pulley 14 is equipped with a second surface 38 of cooperating with the first braking surface 28 a result of the pivoting movement on the support plate 38 to a second jamming position. The passage between the two jamming positions takes place after passing through the voltage of the string of a predetermined threshold.