Basic fence of lifting platform

According to the provisions of GB10055, “The basic fence should be equipped with mechanical interlock or electrical interlock, and the mechanism interlock should make the cage can only be located at the specified position at the bottom, and the basic fence door can be opened. The electrical interlock should enable the protective fence to be opened. The cage stops and cannot be started". There are quite a lot of construction elevators. When the cage is approaching the fence door, the bottom of the cage presses a beam to move downwards, and the reversing pulley wire rope drives the fence door to open upwards. This is not allowed, and it is easy for those near the fence. People cause harm.