Domestic and abroad standard and test information of alimak co . for braking distance of antifalling safety device of construction hoist are analyzed . the writers study the application and inspection situation of safety device in our country and put forward a suggestion of reasonable range of braking distance for safety device with gear cone drum 本文分析了有关施工升降机防坠安全器制动距离的国内外标准条文和alimak公司的试验资料，结合我国施工升降机防坠安全器的应用和检测情况，提出了修改齿轮锥鼓形防坠安全器制动距离合格范围的建议。
