FOLDING LADDER Russian patent published in 2022 - IPC E06C1/38 

FIELD: ensuring work at height means.

SUBSTANCE: invention relates to means of ensuring work at height. The effect is achieved by the fact that the folding ladder contains movable sections moving relative to each other, formed by longitudinal bearing beams connected by the first end pivotally to the steps of the folding ladder, while the hinged connections of the longitudinal bearing beams of adjacent sections of the folding ladder with the step are displaced relative to each other in the direction axis of folding/deployment of the folding ladder, and on each axis of the hinge joint of the longitudinal bearing beams of the adjacent sections of the folding ladder with a step, there are transmission elements rigidly connected to each longitudinal bearing beam of the section, which ensures the rotation of the longitudinal bearing beams of the adjacent sections of the folding ladder on the axes of the hinge joints of the longitudinal bearing beams adjacent sections of the folding ladder, wherein the longitudinal beams are pivotally connected by the second end to the step, which is adjacent to the step, with which the longitudinal carrier beam is pivotally connected by the first end, while the longitudinal carrier beams are made in the form of a U-shaped longitudinal profile, deployed by the open part in the direction of the step, and the locking of the stairs in the working position is carried out by a bracket placed in the holes made in the shelves of the U-shaped profile of two adjacent longitudinal bearing beams, the hinges of which are located in one step.

EFFECT: simplification of the folding ladder design.

1 cl, 7 dwg