| 摘要 |
PROBLEM TO BE SOLVED: To suppress the slip between a rope and a sheave and to reduce a landing error by calculating whether a large slip exceeding a tolerance occurs or not based on the weight unbalance and slip distance constructed in advance, and decreasing the slip distance occurring between the rope and sheave when the slip exceeds the tolerance. SOLUTION: A motor 6 of a rope type elevator is provided with a rotational quantity detecting device 7, and a car 2 is provided with a car position detecting device 8 and a live load detecting device. A sheave 4 is provided with a balance sensor. Whether a slip occurs between a rope 1 and the sheave 4 or not is estimated from the weight unbalance calculated based on the weight unbalance from the balance sensor or the signal from the live load detecting device before an elevator operation. Whether the detected weight unbalance is below a tolerance or not is judged by collating the obtained value with a friction coefficient database prepared in advance, and a slip distance reducing process is conducted when the weight unbalance exceeds the tolerance. |
