Safety mechanism for preventing unintended motion in...

Details Safety mechanism for preventing unintended motion in... Safety mechanism for preventing unintended motion in...

B - Operations, Transporting

66

B

187/13

B66B 1/00 (2006.01) B66B 1/32 (2006.01) B66B 5/04 (2006.01)

Patent

CA 2008251

A traction elevator includes a safety mechanism for preventing unintended motion of the car. A trigger, when armed, is positioned in the path of bosses on the drive sheave or another sheave, such that any unintended rotation of the sheave causes actuation of the trigger and the consequent tripping of an emergency brake. Preferably, the trigger is armed whenever the car is stopped at a landing, and is also selectively armed responsive to elevator overspeed detection.

Un ascenseur à traction est équipé d'un dispositif de sécurité permettant d'empêcher les déplacements non voulus de la cabine. Un déclencheur, lorsqu'il est armé, est placé sur le trajet de bossages situés sur la poulie de traction ou une autre poulie, toute rotation non voulue de la poulie provoquant le fonctionnement de ce déclencheur et le déclenchement consécutif du frein d'urgence. Ce déclencheur est de préférence armé lorsque la cabine s'arrête à un palier; il est également armé sélectivement en réponse à la détection d'une survitesse de l'ascenseur.

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