| 摘要 |
PROBLEM TO BE SOLVED: To provide an abnormality diagnostic device for an elevator, capable of easily and accurately determining that foreign matter is stuck to a groove of a sheave or of a pulley that is equipment of a rotationally driving system.SOLUTION: There is provided the abnormality diagnostic device for an elevator detecting abnormality caused by foreign matter stuck to a sheave or a pulley around which a rope is wound. The abnormality diagnostic device includes velocity/position measurement means 11 measuring a velocity and a position of a car on the basis of a signal of a rotary encoder 5 output proportionally to a rotation amount of a motor 4; sensor abnormality determination means 13 detecting that the sheave or the pulley is an abnormality state on the basis of a measurement value of a sensor 9 provided in the car; abnormality occurrence cycle distance calculation means 15 calculating an interval at which abnormality occurs as a distance on the basis of a result of the velocity/position measurement means 11 and the sensor abnormality determination means 13; outer circumferential length storage means 16 prestoring outer circumferential lengths of the sheave and of the pulley; and abnormality portion identification means 17 comparing the distance and the outer circumferential lengths to identify the sheave or the pulley in which the abnormality occurs. |
