(57) Fold-up ladder, consisting of a multiplicity of "U"- shaped modules in the manner
of a rectangular frame lacking of one of its smaller sides (2), each of which frames
has its two arms hinged in (3) to both arms of the following smaller module, for which
reason, in the folded position, every module (1) of the ladder is inscribed inside
the frame of the foregoing one, except the largest (1A) corresponding to one end of
the ladder, and by swinging them, the modules (1) become alternatively placed in such
a position with respect the ones the others that the ends of the arms of the other
group of modules, all them becoming placed in the same plane, out of which they are
taken at the user's will by pulling the last smallest module (1B) upwards.
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