| 摘要 |
Provided is an elevator safety apparatus for use by an elevator to prevent the elevator from free-falling in emergency conditions. The elevator safety apparatus is also capable of cutting off the power to the elevator's motor and triggering a beeper when it stops the elevator. In normal conditions of the elevator, a stopping bar is suspended due to a weight such that the engaging head of the stopping bar maintains a distance from stopping teeth provided on the guide rail that guides the elevator. And in emergency conditions when the elevator is subject to free-falling, the engaging head of the stopping bar is moved upwards by elastic force due to the loss of the gravitational force exerted by the weight during the free-falling, thereby coming into engagement with one of the stopping teeth and thus stopping the elevator. The elevator safety apparatus is simple in structure, having fewer movable parts so that it is more reliable.
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