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US 7,578,373 B2Granted
Elevator rope slip detector and elevator system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAkihide Shiratsuki, Masahiro Shikai, Tatsuo Matsuoka
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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAkihide Shiratsuki, Masahiro Shikai, Tatsuo Matsuoka
Estimating the term…
In an elevator apparatus, a pulley is provided in a hoistway. A rope that moves together with the movement of a car is wound around the pulley. Further, the pulley is provided with a pulley sensor for generating a signal according to the rotation of the pulley. A rope sensor for measuring the movement speed of the rope is provided in the hoistway. A control panel is provided with: a first speed detecting portion for obtaining the speed of the car based on information from the pulley sensor; a second speed detecting portion for obtaining the speed of the car based on information from the rope sensor; and a determination portion for determining the presence/absence of slippage between the rope and the pulley by comparing the speeds of the car as respectively obtained by the first and second speed detecting portions.
An elevator rope slippage detecting device for detecting presence/absence of slippage between a rope that moves together with movement of a car, and a pulley around which the rope is wound and which is rotated through movement of the rope, comprising:
An elevator apparatus comprising:
Dependencies are inferred from the claim text.