초록 ▼

The elevator safety device creates a false pit beneath the elevator frame using left and right laterally-spaced, fixed stop members fixedly attached to the car frame, and left and right laterally-spaced safety columns affixed to the pit floor and pivotable between an extended position in vertical al

The elevator safety device creates a false pit beneath the elevator frame using left and right laterally-spaced, fixed stop members fixedly attached to the car frame, and left and right laterally-spaced safety columns affixed to the pit floor and pivotable between an extended position in vertical alignment with the left and right stop members, respectively, and a retracted position clear of the car, the frame, and the left and right stop members. The safety columns are bumper-type devices designed to support full car weight should the need arise, and provides the ASME A17.1 minimum depth of pit for the refuge area. Actuators are operatively connected to the safety columns to pivot them between their extended and retracted positions. A pressure-sensitive detector located on the pit floor below the car detects the presence of a person on the pit floor. The actuators are electronically activated to pivot the safety columns from their retracted to their extended positions. Left and right laterally-spaced, movable stop members are attached to the rails which guide vertical movement of the car, and are movable between a first position in vertical alignment with the car frame and a second position clear of the frame, to prevent downward vertical movement of the car below the stop members. The elevator safety system also includes an electric alarm bell, key-activated switches, and electro-mechanical relays. An ancillary AC power source of 120 volts operates the elevator safety system.

대표청구항 ▼

[ What is claimed is:] [1.] A safety system for an elevator car positioned above a pit, the system comprising:a) one or more fixed stop members integrally fixed to the car;b) one or more safety columns that are pivotable between:1) an extended position in which the one or more safety columns are ver

[ What is claimed is:] [1.] A safety system for an elevator car positioned above a pit, the system comprising:a) one or more fixed stop members integrally fixed to the car;b) one or more safety columns that are pivotable between:1) an extended position in which the one or more safety columns are vertically aligned with the one or more fixed stop members so as to prevent the car from descending below a first vertical height in the pit; and2) a retracted position in which the one or more safety columns are clear of the car including the one or more fixed stop members;c) means for automatically pivoting the one or more safety columns into the extended position in response to positioning of the car;d) one or more rails extending up from the pit; ande) one or more movable stop members that are attached to the one or more rails and that are movable between:1) a first position, in which the one or more movable stop members are vertically aligned with the car so as to prevent the car from descending below a second vertical height; and2) a second position, in which the one or more movable stop members are clear of the car.