LADDER Russian patent published in 2019 - IPC B63B27/14 E06C1/38 

FIELD: life-saving methods and devices.

SUBSTANCE: invention relates to means of evacuation from high-rise, in particular, offshore structures, where compactness is required in the parking position or during transportation, combined with a considerable length in the unfolded working position. Ladder is proposed, the transfer of which from the unrolled to the parking position is carried out by simultaneous rotation to the opposite sides of the longitudinal support beams 3 of the ladder section by means of gear wheels 16 connected to the shaft of the gearbox 17. Earring 6 is rigidly connected with the supporting structure 18 of the ramp, so the gear wheel 11 of the initial section 19 begins to rotate relative to the second axis of the earring, dragging along the longitudinal support beam 3 of the drain section, which, in turn, through the hinge 2 turns the next longitudinal support beam 3 and further along the chain all the other beams. Similar movement occurs on the opposite side of the ladder. When this part of the flooring 8 begin to rotate relative to the hinges 9 mounted on the transverse beams 5 sections of the ladder, and part of the flooring 8 go up.

EFFECT: technical result is to reduce the dimensions of the ladder in the folded state.

6 cl, 8 dwg