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Under the control of power failure or rod falling signal, the cross bar of the three roller gate will fall automatically, which is called rod falling gate; Otherwise, it is called non falling rod gate. The advantage of automatic pole dropping is that in case of emergency, when the cross bar falls, the gate channel forms an obstacle free channel, which is conducive to the rapid evacuation of people; The disadvantages are: the rod dropping mechanism often acts, and the "joint" is easy to wear and form a fault point; Moreover, it is necessary to "put on the rod" again after dropping the rod to work. For the electric three-bar mechanism, the automatic rod loading takes a certain time, and the motor is controlled by the control unit to adjust repeatedly, so the mechanism is complex; For mechanical movement, it is necessary to "lift the rod" manually, and the workload is very large. Therefore, the mechanism of the rod drop gate is complex and easy to fail. When it is not necessary, try not to use the falling rod gate. Under the control of power failure or pole falling signal, the non falling gate can rotate freely in both directions and also play the role of evacuation.

For small enclosed areas, where there are emergency evacuation requirements and there are no other evacuation channels, the falling rod gate must be installed. Ensure that in case of emergency, the gate falls and the crowd is evacuated quickly, which is in line with fire safety, such as the shadow theater.

For large enclosed areas, where there are emergency evacuation requirements and other evacuation channels, non falling rod gate can be installed. For example, in scenic spots, gates are installed at the entrance, manual duty at the exit and vehicle access. In case of emergency, tourists can evacuate from the exit and vehicle access. There is no need to install drop rod gates at all.