近年来随着工厂建设工程的大型化,为缩短施工期和提高安全性,趋向采用大组件施工法。为此,日本石川岛播磨重工业公司研制出了大起重量、大作业半径,且具有高扬程的大型自升式塔式起重机。进一步在确保安装精度的基础上,为谋求吊载水平移动量在最小限度,研制了力矩平衡机构。还研 In recent years, with the large-scale factory construction projects, in order to shorten the construction period and improve safety, tend to adopt large-component construction method. To this end, Japan’s Ishikawajima Broadcasting Heavy Industries developed a large lifting capacity, large operating radius, and has a high lift large jack-up tower cranes. Further to ensure the accuracy of the installation, on the basis of seeking to carry the amount of horizontal movement at a minimum, developed a torque balancing mechanism. Also research