A FALL PREVENTION DEVICE AIMED AT PREVENTING AN ELEVATOR COUNTERWEIGHT TO FALL IF ITS SUSPENSION ELEMENTS BREAK AND ELEVATOR COUNTERWEIGHT EQUIPPED THEREWITH

摘要

The invention pertains to a fall prevention device for an elevator counterweight (1) comprising a framework with an upper crossbeam (9) and a parachute device (3) on its rail guides (7), wherein the upper crossbeam (9) contains a suspension sheave block (11) connected to the counterweight hanging cables or belts (13), characterized in that it uses a mechanism connected to the counterweight parachute device (3) and to the counterweight suspension sheave block (11) and integrated into the upper crossbeam (9) of the counterweight frame, said mechanism being controlled to actuate said counterweight parachute device (3) according to the pressure or suspension force of the axes of said pulleys in order to arrest the counterweight (1) below a set axis (15) pressure or suspension force threshold corresponding to a slackening or rupture of the counterweight suspension cables or belts.