A lambdoidal ladder

E - Fixed Constructions – 06 – C

Patent

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Details

E06C 1/393 (2006.01)

Patent

CA 2695024

A lambdoidal ladder comprises front struts (100), back struts(200), treads(500), a folding device)400, a connection device(600) and a platform(300). Wherein the platform(300) is connected to the front strut(100) and the back strut(200), and the structure between the front strut and the back strut is a rotatable connection; the platform(300) comprises a body(310) and a transverse rod(320) which goes through the front strut(100), an orientation slot(314) matching to the transverse rod(320) is set under the body(310); the folding device(400) fixed to the middle part of the front strut and the back strut is constructed a hinge with a H figuration; the tread(500) is fixed to the front and back struts by the connection device(600).

La présente invention concerne une échelle lambdoïde comprenant des montants antérieurs (100), des montants postérieurs (200), un dispositif pliant (400), un dispositif d'assemblage (600), et une plateforme (300). En l'occurrence, la plateforme (300) est reliée au montant antérieur (100) et aux montants postérieurs (200), la structure entre les montants antérieurs et les montants postérieurs étant une liaison capable de rotation. La plateforme (300) comprend un corps (310) et un barreau transversal (320) traversant les montants antérieurs (100), une fente d'orientation (314) correspondant au barreau transversal (320) étant placée en dessous du corps (310). Le dispositif pliant (400), qui est fixé à la partie moyenne des montants antérieurs et des montants postérieurs, se présente sous forme d'une charnière en H. Les marches (500) sont fixées aux montants antérieurs ou postérieurs par le dispositif d'assemblage.

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