COLLAPSIBLE DERRICK Russian patent published in 2021 - IPC E04G1/34 

FIELD: construction.

SUBSTANCE: folding tower comprises pair-connected group levers connected to each other by a hinge at one end, each other end is hinged to the end of its beam parallel to the working platform plane, ends of adjacent groups of levers are connected hingedly to one end of the same beam and are equipped with rigidly fixed on them transmission elements, providing rotation of levers of adjacent groups, pivotally connected to the same beam, in opposite directions, at the other end of each beam there are also pivotally connected levers of adjacent groups of levers, equipped with transmission elements, providing rotation of levers of adjacent groups of levers; structure consists of two parallel synchronously identical assemblies.

EFFECT: invention relates to the field of means of providing work at height, in particular to folding compact towers.

1 cl, 7 dwg