一、报警响时且退让任何一种交通运输工具都有一个载重量的问题 ,作为垂直运输工具 ,电梯自然也不能例外 ,而且由于结构原理的缘故 ,电梯还是一个对超载相当敏感的运输工具。从图１可以看出 ,只有当曳引钢丝绳与绳轮之间的摩擦力（称之为曳能力）能够平衡掉轿厢侧与对重侧的重 First, when the alarm rang and retreat Any of the transport vehicles have a load of weight, as a vertical transport, the elevator is no exception, of course, and because of structural principles, the elevator is a very sensitive to overload transport. It can be seen from Fig. 1 that the friction between the hoisting ropes and the sheaves (referred to as the drag capacity) balances the weight on the car and counterweight sides only