| 摘要 |
PROBLEM TO BE SOLVED: To provide a road bridge expansion device capable of increasing durability of an elastic member while making the most of a merit obtained by the elastic member of a surface.SOLUTION: An elastic member 3 is integrated with attachment parts 2 that are arranged in the state of facing each other at an interval. A metallic member 10, which comprises an exposed part 11 and an anchor part 13 extended downward from the exposed part 11, is embedded in the elastic member 3 and joined thereto. The exposed parts 11 are arranged in the state of being dotted on a top surface 4 of the elastic member 3.SELECTED DRAWING: Figure 1 |
