Aperfeiu00e7amento introduced in supporting feet for fixation in modules of stairs and the backrest folding

摘要

"Improvement introduced in supporting feet for fixation in modules of stairs folding and back.Consisting of block - support (5) with loop handle upper (6) and a lateral hole cylindrical trunk - not by (7) to accommodate the body trunk cylinder (8) of the truncated cylindrical pin (9),Said body (8) with a truncated cylindrical cradle for fitting the helical spring pressure (10) which is supported at the bottom of the hole (7),Block with said support (5) introduced in the internal tubular rod will of the rectangular foot (1),Said pin (9) trespassando a small circular hole (4) and with said rod (1) is introduced into the lower end of a rectangular tubular section (11) of the modules of the ladder (12).To compose ladder support (13) and a folding (14) with semicircular cutouts ambilaterais with external water (15).To push the pin (9) inside and a plurality of small round holes through ambilaterais aligned and alternate between them (16) which will lock the pin (9) to travamenTo,The development aims to allow promote adjustments to maintain folding ladder or the backrest in the upright position when it is supported on uneven surfaces or which have an inclination Q.The EU could disturb it and causing it to fall and the user.