The elevator door cannot be closed, which may seem like a small matter, but in fact hides a lot of knowledge about industrial rubber and precision machinery! Today, let’s talk about the “hardcore technology” behind elevator doors.
1. Sensor ‘Strike’: Safety First, But Don’t Be Too Sensitive
The light curtain or safety touch panel on the elevator door is like a pair of “eyes” constantly watching for obstacles. But if these “eyes” are blinded by dust or if the components are aging, the elevator will misjudge “danger ahead” and refuse to close the door.
This is like seals in industrial rubber products, once they age or accumulate dust, their performance will be greatly reduced.
2. Mechanical structure “jamming”: door rails and pulleys are “old drivers”
a. Stones, broken tiles, or deformed door leaves stuck in the door rails can cause the door to get stuck halfway. And the slipping of the belt and wear of the hanging wheel of the gantry crane are common problems.This is like an industrial rubber conveyor belt, which will wear out over time and needs to be replaced regularly. The cleaning and lubrication of elevator door rails should also be taken care of like maintaining a car.
b. Control system “exhaust”: buttons and limit switches are “scapegoat”
If the door opening button inside the elevator is stuck or the outbound call button is not reset, the elevator will continue to “hear” the door opening command. And the offset of the limit switch will make the door “unable to find” the closed position.
c. This is like an industrial rubber seal ring, if not installed properly, it will affect the operation of the entire system.
