Under the power or fall lever signal control, three roll brake lever down automatically, called down rod brake machine; Otherwise, called don't lever gate. Rod has the advantage of falling, in case of an emergency, cross bar, channel formed barrier-free brake machine, is advantageous to the crowd evacuation quickly; The downside is that: fall rod mechanism often action, easy to wear and tear "joint", form the point of failure. Moreover, fall after rod needs to be "lever" to work. For the electric pole, automatic pole need to spend a certain amount of time and controlled by the control unit motor adjustment, organization complex; For mechanical movement, need to rely on artificial lifting lever ", workload is very big. Therefore, fall rod brake machine mechanism is complex, easy fault. When there is no need to, as far as possible do not use the lever gate. Don't fall lever gate under the power or fall lever signal control, free two-way rotation, can also play a role to evacuate.

For small closed area, emergency evacuation requirements and no other evacuation passageway occasions, be sure to install lever gate. When I ensure that the emergency brake machine rod, the crowd evacuation quickly, in line with the fire control safety, such as movie theaters.

For large enclosed areas, have emergency evacuation requirements, and there are other occasions, the evacuation passageway can install not lever gate. Such as traveling scenic area, entrance gate machine installation, export duty artificially, and vehicle tunnels, in case of an emergency, visitors will be evacuated from the place such as export, vehicle channel, no need to install lever gate.