Why should the construction hoist cage trap door be equipped with Gas Spring?

- Aug 10, 2018 -

Why should the construction hoist cage trap door be equipped with Gas Spring? 

During maintaining or fixing of the outdoor elevators, the maintenance personnel must go to the top of elevator car. When they are going through the trap door, most of them will grasp the edge of the trap for helping up or down. At that moment, if the door is accidentally shut down by other persons or strong wind, the sharply falling down trap door will cut their fingers. So, there have been many accidents of fingers cutting at the construction elevator, most of the victems are the maintenance persons. 

The Gas Spring which support the construction hoist cage top trap door is to prevent the trap door from falling, fast closing and cutting the hands and fingers of the operator and maintenance persons. Without this device, the trap door may fall and cut the fingers of persons, or hit their heads, when they are climbing up or down the trap. 

elevator cars trap door