Multipurpose stairs ladder for use on staircases comprises two ladders, and a horizontal working platform having a locking device on each end and rotated in a horizontal plane

摘要

Multipurpose stairs ladder for staircases comprises two ladders (1), each having two uprights (3) with a base (4) and connected by rungs (2), and a horizontal working platform (5) having a locking device on each end. The working platform can be rotated in a horizontal plane and displaced along the ladders relative to the longitudinal axis (7) of the ladders. Preferred Features: Each of the two sides of the frame of the working platform is provided with three hinges (18). The parts of the frame are held in the desired position by locking pieces in the hinges or by separate reinforcements.