FIELD: lifting devices.
SUBSTANCE: invention relates to a composite ladder and can be used for lifting on metal, wooden or reinforced concrete supports. Technical result is achieved due to that sectional ladder comprises base section, at least one connecting section, top section, slide-type device with travel limiter, free-run slide-type device and service platform; wherein the base section comprises posts; steps; stops in support; means of fixation on support; means of tensioning means of fixing and means of connection with adjacent section; connecting section comprises racks with steps; stop in upper part of supports for racks in support; means for connection with adjacent section; T-shaped rigid anchor line for slider-like devices arranged along one of the posts; synthetic rope fixed on the stop to form a loop and winch, located on the lower part of one of the posts; upper section comprises posts with steps; support with means of connection and tension in upper part of posts for support in support and fixation on it; connection with adjacent section, located in lower part of posts; T-shaped rigid anchor line for slider-like devices arranged along one of the posts; synthetic rope fixed on racks by means of rings with formation of loop for support and winch, located in lower part of one of posts. and hooks located on lower part of each post; device of slide type with travel limiter consists of guide from aluminium alloy of device of slide type with travel limiter, locking eccentric with eye, mechanical locking pin of slide-type device with travel limiter, belt shock absorber, crossed by polyamide threads, oval carabiner, which is intended for fixation of slider type device with travel limiter to breast anchor point of safety tether, device of slide type with free stroke consists of guide from aluminium alloy of slide-type device with free stroke, locking eccentric with eye, mechanically locking pin of slide-type device with free stroke, belt shock absorber, crossed by polyamide threads, oval carabiner, which is intended for fixation of slide-type device with free travel to breast anchor point of safety tether, service platform includes fixing device and platform.
EFFECT: technical result is higher reliability of ladder when lifting on metal or reinforced concrete supports at different heights, which can exceed height of one section of ladder.
5 cl, 15 dwg
