The elevator landing door is the component of the elevator that we see most directly, and it is also the most exposed component. It plays an important role in preventing people from falling down the elevator shaft. So what are the specific requirements for elevator landing doors? These are all introduced in the standard in more detail, but why the North American Elevator Standard requires landing doors to withstand 5000N static force?
Probably in 1996, there was an accident in Canada where two men were playing near the elevator and then hit the elevator landing door, causing their fall into the hoistway. So the Canadian Committee for Standardization CSA immediately began to revise the Canadian Elevator Standard B44, adding the requirement of 5000N for the elevator landing door. The requirement indicates to apply a force of 5000N to the elevator landing door, and the deformation of it cannot exceed 20mm and cannot be removed. Later in 2000, the standards of both the United States and Canada were unified, that is, the same standard has two numbers like ASME A 17.1 and CSA B44. From the standpoint of the purpose of the standard-setting: the 5000N requirement should be able to prevent the danger of two people falling into the hoistway when playing near the elevator, for the speed of two people cannot be particularly fast at the same time!
Therefore, what kind of accidents can be avoided by the 5000N requirement? American elevator experts have made calculations (according to the law of conservation of momentum, the contact time of the impact will be determined by a high-speed camera, so that the impact force can be calculated), and they hold that 5000N can prevent a football player who is 115kg hitting the elevator landing door and thus generating the impact force when running at high speed, and the elevator landing door will not be damaged!
Considering that the depth of most elevator waiting halls is not too deep, even if you want to speed up to crash into the elevator landing door, the speed will not increase. It will not reach the speed of rugby players running at high speed. Therefore, if the elevator landing door is designed under 5000N static force, the elevator door will not become damaged! Of course, it does not mean that you can hit the elevator landing door.
This side opening landing door device is ZP interface, suitable for cargo elevator.
This model is specially designed for high-speed ladders, up to 10m / s. With double hammer closing method.