Main rope elongation amount detection device for an elevator

摘要

PURPOSE:To measure the dimension of a space between a balance weight and a buffer by a single person so as to detect an elongation amount of a main rope by providing a measuring device which measures the dimension of the space between the balance weight and the buffer. CONSTITUTION:A magnet unit 12 adheres to the lower part of a balance weight 3 in a condition that an extending/contracting unit 11 of a measuring device 10 is extended with a maintenance person riding on a cage 2. Next the balance weight 3 is lowered to the lowermost part of a lift path 1. Here in the case of extending a main rope 4, the extending/contracting unit 11, whose point end is brought into contact with a buffer 9, is contracted. Next the extending/ contracting unit 11 is maintained in a contracted condition when the balance weight 3 is lifted. Then a length of the extending/contracting unit 11 is actually measured by the maintenance person staying on the riding cage 2 by lowering it till the cage becomes flush with the measuring device 10, and an elongation amount of the main rope 4 is detected by measuring a space between the balance weight 3 and the buffer 9.