Patent ID: 6739431
Filing Date: 2004-05-25
Classification: B66B,Y10S

Abstract:
An escape device of elevator comprising:an activation assembly comprising a first rope extended down to a side of a car by passing a plurality of first sheaves, a second sheave coupled to one end of a first link, a third sheave in the car being coaxial with the second sheave, a pivot at the other end of the first link, a flexible board having one end coupled to the pivot, a second link having one end slidably coupled to an elongated groove in the first link and the other end coupled to a roller, a guide for permitting the second link to slide through, a projected limit member in the car, a bar proximate the other end of the first link, the bar being perpendicular to the first link, and a catch adjacent the bar; and an operation assembly comprising a second rope having one end coupled to a protrusion of a rotating disk, two opposite third links pivotably coupled to the rotating disk and a top of a door of the car respectively, a weight at the other end of the second rope, a vertical cylinder within a wall of the car for permitting the weight to slide therein, a plurality of fourth sheaves for guiding the second rope between the weight and the protrusion, an aperture in a wall of the cylinder, a spring depressible shaft adjacent the aperture, a wedge at one end of the shaft, the wedge being projected into the cylinder to support the weight in a normal state, a third rope coupled between the other end of the shaft and the other end of the flexible board, and a plurality of fifth sheaves for guiding the third rope between the other end of the shaft and the other end of the flexible board; wherein in response to a stop of the elevator in case of emergency, the first link pivots as the third sheave is rotated manually, the second sheave pivots to a position between the first sheaves so as to pull the first rope for activating the activation assembly, one end of the second link slides in the groove in response to the pivoting of the first link, the second link then moves toward the limit member along the guide, the bar pivots to be caught by the catch, the car will begin to lower as activated by the activation assembly if the car stops at a position between two adjacent floors, the roller is enabled by the limit member once the car has lowered to be flush with the immediately lower floor, the second link is pushed back to its original position, the first link returns to its original position, the bar is disengaged from the catch, the flexible board is flexed about the pivot to pull the third rope, the wedge moves out of the cylinder by the pulling of the third rope, the weight falls down to a lowest position in the cylinder as the support of the wedge is removed, the second rope is pulled to rotate the disk, the third links pivots in response to the rotation of the disk, and eventually the door is opened.