Bidirectional parking blockage system of shutter door and its method

The invention discloses a bidirectional parking blockage system of a shutter door and its method. On the one hand, the invention provides a drive system which can be used in both directions by the shutter door, and spare parts are not required to replace and add; the parking forcing system on the other direction can be realized by rotating a lower cam at an angle in installation, the operation is simple; for the upper and lower cams are separated from the gear, the manufacturing and processing are simple, and the cam can be replaced only in case of damage; thus the cost is reduced and efficiency is improved, the system is more convenient to carry out batch production; on the other hand, the system solves the problem of machine fault caused by spring rupture, insufficient elasticity or failed elasticity since a spring gradually losses the mechanical performance in use. 本发明公开种卷帘门双向阻停系统及其方法，发明方面在于，提供了卷帘门可以双向使用的传动系统，不用更换和增加零件，在安装中只要把下凸轮旋转个角度即可实现另个方向的逼停系统，操作简单，由于上下凸轮与齿轮分开因此制造加工简单，如发生损坏只需要更换下凸轮，降低了成本提高了效率，更便于批量生产；本