Patent ID: 6752246
Filing Date: 2004-06-22
Classification: B66B

Abstract:
An elevator speed governor comprising:(a) a rope clamping element capable of gripping a speed governor rope for actuating an emergency stop device provided on a cage of an elevator; (b) a sheave that rotates with a speed corresponding to a speed of said cage, being engaged by said speed governor rope; (c) a rotary weight that rotates about an axis of rotation directed horizontally, being linked with rotation of said sheave and that is displaced by centrifugal force so as to move away from said axis of rotation; (d) a speed governor linkage mechanism on which said rotary weight is mounted and that is moved with displacement of said rotary weight and that actuates said rope clamping element if a movement exceeds a prescribed range; (e) a speed adjustment mechanism provided in said speed governor linkage mechanism, that is displaced with movement of said speed governor linkage mechanism and that generates a first balancing force that restrains movement of said speed governor linkage mechanism by resilient force generated in accordance with the amount of said displacement; and (f) a balancing weight provided in said speed governor linkage mechanism and that loads said speed governor linkage mechanism with a second balancing force produced by weight acting on said balancing weight that restrains movement of said speed governor linkage mechanism.