FOLDING BLOCK OF COLLAPSIBLE BRIDGE Russian patent published in 2021 - IPC E01D15/127 

FIELD: bridge construction.

SUBSTANCE: folding block of a collapsible bridge on a platform of an assembly and transport vehicle provides improved driving conditions on the collapsible bridge and equipment of bridge crossings without the use of a guide beam (avanbek), which is ensured by the formation of a continuous roadway and the inclusion of an intermediate support in the folding block of the collapsible bridge. The folding block of the collapsible bridge is opened transversely on lifting frame (1) of platform (2) of assembly and transport vehicle (3). After separation of detachable hinges (7) and closure of butt joints (20) of lower power belts by means of lifting frame (1), the block is longitudinally opened and simultaneously lowered onto a barrier. Before the final lowering of the longitudinally opened block, intermediate support (12) is loosened and automatically rotated on axes (13). Lower racks (15) are extended with spurs and belt links (16), after which upper and lower racks (14) and (15) are rotated on axes (13), forming a gantry support. Lowering of the front end of the block continues until spurs with belt links (16) of intermediate support (12) are supported on the ground, then trunnions (8) of the front end of the block are lowered on carriages (28) on axis (13).

EFFECT: construction of a folding block of a collapsible bridge.

3 cl, 19 dwg