前言在起升机构里,钢丝绳被看作是易损件之一。为了延长钢丝绳的寿命,应把安全系数和D/d值取得大;但为了使机构轻量化和小型化,则应牺牲钢丝绳的寿命,将以上数值取得小。特别是在某些起升机构里,钢绳容易受到 Preface In hoisting gear, wire rope is considered as one of the wearing parts. In order to extend the life of the rope, the safety factor and the D / d value should be made large. However, in order to reduce the weight and size of the mechanism, the life of the rope should be sacrificed and the above values ​​should be made small. Especially in some hoisting gear, the rope is susceptible