Steel cable inspection system for elevator

The invention addresses the problem of measuring a marking interval without causing burden to maintenance personnel during inspection, and judging a degradation state according to the marking interval. The steel cable inspection system of an elevator in an embodiment of the invention has a sensor (21), an encoder (22) and an arithmetic device (23). The sensor (21) detects a plurality of marks setat some interval along a length direction of a main steel cable (10) serving as an inspection object. The movement of the encoder (22) and the main steel cable (10) synchronously generate pulse signals. The arithmetic device (23) calculates the interval of the marks according to detection moment of each mark obtained by the sensor (21) and a count value of the pulse signals output by the encoder (22), and judges the degradation state of the main steel cable (10) according to an arithmetic result. 本发明的课题在于在检查时以不对维护人员造成负担的方式测定标记间隔，并根据该标记间隔来判定劣化状态。本发明的实施方式的电梯的钢缆检查系统具备传感器(21)、编码器(22)以及运算装置(23)。传感器(21)检测沿作为检查对象的主钢缆(10)的长度方