Recessed side door for truck bodies

A recessed side door for bodies of trucks, trailers or the like, in which the upper (2,3) and lower (4,5) edges of the door are respectively articulated to the ends of two pairs of upper (6,7) and lower (8,9) arms which are associated like an articulated parallelogram with two pairs of fulcrums (10,11,12,13) which are fixed externally, respectively on top of the body and under it.