| 摘要 |
PURPOSE: A drop preventing device is provided to prevent damage to a human life and property by preventing an upper deck of a bridge from being separated in an earthquake. CONSTITUTION: A drop preventing device comprises a reciprocating compression spring damper(100). The reciprocating compression spring damper efficiently absorbs deformation due to earthquake. The reciprocating compression spring damper comprises a reciprocating compression spring inner cylinder(80), a spring compression plate(81,91), a shock absorbing rubber pad(82,86), a spring pressure plate(83,85), a compression spring(84), an inner cylinder connector(87), a reciprocating compression spring outer cylinder(90), and an outer cylinder connector(92). |
