The elevator door system is composed of a door motor control device, elevator door motor, elevator door transmission and linkage device, elevator door lock, elevator door closing protection device, in-place switch, and deceleration switch.

The opening and closing movement of the elevator floor door is driven by the car door. In the whole door system of the elevator, the car door is the active door, and the floor door is the passive door, so the correctness and safety of the car door work are particularly important. Elevator car doors and floor doors are the same, the use of high frequency, a long time is prone to mechanical parts loose, drive belt or chain jamming, elongation, and so on. Therefore, should focus on the maintenance and maintenance of the elevator car door parts of the shape, size, and location, check its movement, wear, and tear condition and its function is normal, so as to ensure that the elevator is a safe, reliable, and smooth operation.

I. The working principle of elevator car door opening and closing door
Elevator level to the station, the main controller of the control cabinet sends instructions to the door controller, the door controller controls the car door motor rotation, thus driving the transmission belt rotation, fixed in the transmission belt on the car door hanging plate with the left and right movement, so as to realize the car door opening and closing. Installed in the car door hanging plate on the door knife with the car door hanging plate moving left and right, so as to realize the layer door roller and car door knife with the door. Car door knife and layer door roller contact and movement on the one hand to realize the layer door locks and car door locks open, on the other hand, drive the opening of the layer door.
The speed of the elevator car door opening process is controlled by the opening and closing door deceleration switch and the opening and closing door in place switch. Among them, the deceleration switch is used to realize the deceleration of the opening and closing doors, and the in-place switch realizes the deceleration of the elevator opening and closing doors in place. In the process of closing the elevator door, if there is an obstacle or a person entering or leaving the elevator, the elevator safety contact plate and the door light curtain will stop closing the door and open it in the opposite direction after receiving the signal, so as to realize the role of safety protection. The opening and closing of the elevator car door can be realized by the command signal, but also by the triangular key control the opening and closing of the car door.

Elevator door machine switch in place sensor:
1.IF17 / IF18 series proximity sensor product features:
2. Aspherical optical lens, eliminate stray light interference;
3. Extra-long detection distance, the maximum detection distance is up to 50m
4. AC and DC dual-use, relay outputs
5. LIGHT ON / DARK ON conversion function

IM12 series proximity sensor product features:
1. Strong load capacity, can drive loads up to 200mA.
2. Non-contact switch, stable performance.
3. Protection grade IP67

Hope the above information can help you choose the right elevator door switch in place sensor. If you are still not sure which product to choose, you can also contact us by email. G-TEK has the most professional technical service team and sales service team to provide you with the most professional sensor product solutions.