| 摘要 |
A poster column for a supporting banner is provided to improve the assembly of an advertising tower by making a whole structure of the advertising tower simple. A lifting unit(30) is installed at four sides of the main body, and a movable support(40) is installed at the lifting unit in the horizontal direction. A stationary support(50) is installed at the lower part of the main body in order to be parallel to the movable support, and a controller(60) is connected to the lifting unit. A main body comprises a base portion(22), a frame part(24), and a landmark part(26), and four lifting units are installed at the frame, and an upper sprocket is equipped in both ends of the upper shaft. |
