我厂某车间在加工大型型架和大型铸锻件时,经常要翻转这些大件。以往利用普通吊钩桥式起重机来翻转时,出现过吊具脱钩的现象。参考国外的吊钩保险装置,发现它们都存在 I plant a workshop in the processing of large-scale castings and forgings, often have to flip these large pieces. In the past the use of ordinary overhead crane crane to flip, there sprung detachment phenomenon. Refer to foreign hook insurance device and found that they exist