介绍了塔式起重机目前附着情况,总结了目前固定式附着杆存在的问题及不足,对附着内力随附着点及附着角度变化进行了分析,并根据附着杆内力设计出抽拉式附着杆,弥补了固定式附着杆的不足。 The current situation of the tower crane is introduced, the existing problems and deficiencies of the existing fixed pole are summarized, the change of the attachment force and the attachment angle are analyzed, and the pull-out stick is designed according to the internal force of the stick. The lack of fixed attachment rod.