| 摘要 |
PROBLEM TO BE SOLVED: To construct accurate button-like projections on a road surface continuously in a short time. SOLUTION: Using paint (c), a band-shaped line A of 1 to 3 mm thick is constructed on a road surface beforehand. Next, using a projection work execution machine 1 having a projection forming rotor 2 rotating in parallel with the road surface, groove holes 2a are drilled in the projection forming rotor 2 and, while the projection forming rotor 2 is rotated according to the movement of the projection work execution machine 1, the paint (c) is filled sequentially from the inside top of the groove holes. When the groove holes 2a arrive at the bottom position, projections B are dropped on the band-shaped line A to lay them down on the road surface. |
