| 摘要 |
PURPOSE: To easily and swiftly install and remove a block-like road surface sign main body, which is used as a road surface sign, to and from the road surface and obviate the need to repair the road surface after the sign is removed. CONSTITUTION: A female threaded hole 3a is installed to an anchor 3 and it is half-embedded in and fixed with a road surface 10. A hexagonal bolt 2 is inserted into a block main body 1. The hexagonal bolt 2 is screwed in the female threaded hole of the anchor bolt 3 and fastened. |
