Why conduct at least three pull tests on the anti fall device

As is well known, the anti fall device must undergo self-locking detection before use, that is, by quickly pulling the steel wire rope to check whether it can complete self-locking in a very short distance. If it cannot be locked or the steel wire rope is pulled out for a long time before locking, it means that the anti fall device has not passed the detection and cannot be used.

There are strict regulations for the self-locking detection of anti fall devices, which require at least three pull tests. Some people are puzzled by this. Why does the self-locking detection of anti fall devices have to be carried out at least three times? Below, based on the component structure of anti fall devices, Guanhang will answer this question for everyone.

Firstly, we need to understand that the self-locking of the anti fall device is achieved through the engagement of internal claws and ratchet teeth, and there are multiple ratchet teeth. Each time the claws engage for self-locking, the teeth engaged by the claws may not be the same. Only one pull test detects one of the ratchet teeth, while multiple tests are conducted to ensure the integrity of multiple parts, thereby improving the effectiveness of the anti fall device self-locking system to a certain extent.