| 摘要 |
PROBLEM TO BE SOLVED: To enable the surface of a reflector to be cleaned even with a small wind force and regardless of wind direction, without damaging a reflecting area. SOLUTION: A self-cleaning visual line guide sign causes its rotary blades 3 freely rotatably attached on their axes to the front of a reflector 2 to be rotated by wind force, causing wipers 5 provided on the rotary blades 3 to make sliding contact with the surface of the reflector 2. The rotary blade 3 has a first blade piece 4, placed upright on a plurality of arm parts 32 extended from a bearing part 31 toward the outer periphery of the reflector 2, and a second blade piece 6 placed on a circular part 33 placed in a circle on the outer periphery of the reflector 2 while connecting the ends of the arm parts 32 together, both of the blade pieces facing the surface of the reflector 2. A wind blowing against the surface of the reflector 2 from the front is made to pass between the surface of the reflector 2 and the circular part 33 and flow toward the outer periphery of the reflector 2, and not only the first 4 but also the second 6 blade pieces receive the wind to rotate the rotary blades. |
