| 摘要 |
FIELD: metal bridge building, folding blocks of bridge spans. SUBSTANCE: bridge block able to be folded in crosswise and lengthwise directions includes two lower and two upper half-beams interconnected with lengthwise hinges with upper and lower plates of roadway with one placed over another. Roadway plates have hinges on their peculiar ends, and have slots on their other ends. Platform keels are inserted into the slots. The platform has guide trays. The trays are interacted with the rollers installed in cantilevers fastened to faces on lower corners of the half-beams. Side of the platform are folding-back. Blocks are installed on edges of folded side front part. External surfaces of folded sides have rotary secured struts. Besides, one transom of half-beams has eye-bolts, blocks, fork-type and single eyes, and worm gear. Another transom has axles with eyes of pins of two-way hydraulic shock absorbers. Lower parts of the transoms of the half- beams have semiautomatic butt joints, Ridge strips are fastened to transoms from upper zone. EFFECT: increased length of transported bridge block at the expense of lengthwise and crosswise unfolding sections directly on the platform of standard truck. 2 cl, 18 dwg |
