APPARATUS FOR BRIDGE SPAN STRINGERS ERECTION Russian patent published in 1997 - IPC

FIELD: bridges building, apparatus is used in bridges spans stringers erection. SUBSTANCE: aim is to decrease metal usage and labour consumption in apparatuses for erection of spans construction stringers of big spans. Apparatus has guides 2 fixed along cross-bars of adjacent pillars 1, mechanism of lifting, that has beam-lever 3 with arms located at angle of less than 180 deg, sling-type band connection rod 4 with holes 5 for passing of cylindrical hinge at end of short arm of beam-lever 3 linked to supporting hinge-movable supporting hinge-movable device 6 during beam-lever 3 transfer in initial position for next step of lifting. In the case lower end of sling-type band connection rod 4 is coupled with tail-end expansion 7 of erected beam 8. Beam-lever 3 using turning hinge 9 is rested ar cross-bar of U-shaped double cantilever frame 10 (11) at point of its conjugation with one of pillars, that are rigidly fixed on ends of erected beams of adjacent span on one side of erected span and on crossbar of intermediate pillar on other side of erected span. Supporting hinge-movable device 6 is located above receiving cantilever 12 of cross-bar of frame 10 (11), has way of transversal movement along cantilever 12 with suspended to it in extreme upper position by shortened sling-type band connection rod 4 of erected beam 8 to its loading place 13 on rolling cars 14 for further transportation of beam 8 by guides 2 till planned position across bridge. EFFECT: improved process of bridge erection. 2 cl, 5 dwg