| 摘要 |
PURPOSE: A center line marking apparatus is provided to facilitate the opening and closing of a door by making a center line of a drum to be met at an exact right angle with a straight line in a longitudinal direction which is composed by the side end part of a screen when the screen is fixed. CONSTITUTION: A center line marking apparatus comprises a bed unit(10), a first guide rail(20), a drum fixing member(30), a drum connection shaft rotation drive unit(40), a bushing(50), and a marking unit(100). The bed unit has a flat upper side. The first guide rail is fixed on the upper side of the bed unit and installed lengthways from side to side. The drum fixing unit is positioned on the outside of one side end of the first guide, and fixed on the bed unit. The drum connection shaft rotation drive unit rotates a drum connection shaft. The bushing is installed to be mutually faced with the drum connection shaft, and connected to be guided from side to side on the first guide rail. The marking unit is connected to be guided from side to side on the second guide rail and equipped with a marker fixing member. |
