门式起重机是长大笨重货物的主型装卸机械,换装抓斗和集装箱吊具等取物装置后,可进行散货和集装箱装卸作业,适用于露天货场、料场和集装箱堆场。门式起重机已是历史悠久的传统产品,其主要配套件比较成熟。因而产品的标准化、系列化、通用化对制造和使用单位的经济效益有重要的影响。近年来,机械工业、交通运输、仓储等行业都颁布了有关门式起重机的标 Gantry cranes are the main type of loading and unloading machinery for bulky and bulky goods, as well as loading and unloading of grabber and container spreader. They are suitable for loading and unloading of bulk cargoes and containers. They are suitable for open-air yard, yard and container yard. Gantry crane is a long history of traditional products, the main components are more mature. Therefore, the standardization of products, serialization and generalization of the manufacturing and use of units have a significant economic impact. In recent years, machinery industry, transportation, warehousing and other industries have promulgated the standard gantry crane