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施工升降机又叫建筑用施工电梯,是建筑中经常使用的载人载货施工机械。施工升降机之所以能安全的载人载物运行,主要是由于其配备了防坠安全器,大大提高了安全系数。防坠安全器是施工升降机的安全保护装置,当施工升降机遇到突发事故时它可以防止吊笼坠落,保证人员及货物的安全。目前建筑施工现场广泛使用的是齿轮锥鼓形渐进式防坠安全器和瞬时式防坠安全器,分别应用在齿轮齿条传动的人货两用施工升降机和卷扬或曳引式施工升降机上。近年,因瞬时式防坠安全器失效而造成人员伤亡和经济损失的
Construction elevator, also known as construction elevator construction, is often used in construction of manned construction machinery. The reason why construction lifts can safely carry manned objects is that they are equipped with anti-fall safety devices which greatly improve the safety factor. Anti-fall safety device is a safety protection device for construction lifts. It can prevent the cages from falling down and ensure the safety of personnel and goods when the construction elevator encounters an accident. At present, widely used in the construction site of the gear cone-shaped gradual fall safety gear safety and instantaneous anti-fall safety device, respectively, used in gear rack and pinion construction of human and cargo construction hoist hoisting or traction hoist . In recent years, due to instantaneous fall safety device failure caused by casualties and economic losses