초록 ▼

A safety apparatus includes a safety device and a centrifugal force speed governor for preventing overspeed conditions of an elevator car in both the downward direction and the upward direction. A bracket attached to the elevator car slidably retains a shaft at right angle to a guide rail attached t

A safety apparatus includes a safety device and a centrifugal force speed governor for preventing overspeed conditions of an elevator car in both the downward direction and the upward direction. A bracket attached to the elevator car slidably retains a shaft at right angle to a guide rail attached to an elevator shaft wall. A U-shaped frame is attached to an end of the shaft and rotatably carries a running wheel. A compression spring extends over the shaft between the bracket and the frame to bias the running wheel against the web of the guide rail. On each side of the running wheel, a pair of release levers are rotatably supported to rotate during travel of the car in normal operation. In response to an overspeed condition, the release levers pivot into engagement with a pair of stationary ratchet wheels which are connected with a pair of actuating levers. The ratchet wheels are rotated by the running wheel which movement rotates the actuating levers. The actuating levers each move a release arm and one of the levers is connected to an actuating rod, which in turn is in connected to a release arm of another safety device on the car. The release arms extend into a wedge box of the safety device to actuate wedge-shaped jaws to engage the guide rail. For resetting the safety apparatus, the elevator car is restarted after a safety stop in the opposite direction of travel.

대표청구항 ▼

An apparatus for stopping an elevator car comprising: a safety device for engaging an elevator guide rail to stop an elevator car; and a speed governor having a running wheel rotatably mounted on an axle attached to a U-shaped frame, said wheel being biased against and driven by the guide rail for t

An apparatus for stopping an elevator car comprising: a safety device for engaging an elevator guide rail to stop an elevator car; and a speed governor having a running wheel rotatably mounted on an axle attached to a U-shaped frame, said wheel being biased against and driven by the guide rail for the elevator car in an elevator shaft and said U-shaped frame being attached to an axially slidable shaft, said slidable shaft being guided by a bracket adapted to be attached to the elevator car, a ratchet wheel fixedly attached to said axle, at least one pair of centrifugal force operated release levers attached to said running wheel which during normal operation of the elevator car rotate around said ratchet wheel, an actuating lever attached to said axle, and a release arm connected between said actuating lever and said safety device whereby upon the occurrence of an overspeed condition of the car in either direction of travel of the car, said release levers engage said ratchet wheel causing said ratchet wheel to rotate in a direction corresponding to the direction of travel of the car, said ratchet wheel further causing said actuating lever to be rotated in a direction corresponding to the direction of travel of the car to move said release arm in a direction associated with the direction of travel of the car and actuate said safety device.