| 摘要 |
PURPOSE: An automatic open and shut apparatus for a gate door is provided to move a gate door without noise and strengthen the durability while a door fixing bracket is united with a driving shaft that rotated by a motor and is shaped in multi-helical gear. CONSTITUTION: An automatic open and shut apparatus for a gate door comprises a sensor(20), a motor(30), a driving shaft(40) and a door fixing bracket(50). A sensor is installed at the upper part of a gate door and senses the entrance. A motor is rotated according to the input signal of sensor. A driving shaft interlocks with the motor and is installed on the upper part of a gate way in the direction of length, and a multi-helical gear part is formed in the outside of the driving shaft in the right direction. In the upper part, a door fixing bracket has a fixing hole having helical gear grooves to be united with helical gear part, and in the lower part, a door fixing bracket has a gate door fixing member(52). |
