| 摘要 |
PURPOSE: An automatic open a shut apparatus for a gate door is provided to open and shut a gate door without noise and strengthen the durability by a driving shaft and a transfer pipe. CONSTITUTION: In an automatic open and shut apparatus for a gate door, a motor(30) is driven by the signal of a sensor(20) that is installed at the upper part of door frame of gate door, and rotates a shaft of motor in right direction. And at the same time a driving shaft(40) which interlocks with the shaft of motor rotates in right direction. A transfer pipe(50) has a right helical gear groove part in the inside surface to be united with a right helical gear part(41) of the driving shaft. And a door fixing bracket(60) is slid into the opened end transfer pipe. |
