ES1046789U - Staircase attachable to vertical surfaces. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Staircase (1) attached to vertical surfaces, comprising two longitudinal (parallel) and longitudinal beams (2), and cross beams (3) transverse to the beams and which is articulated to a vertical surface, so that it is capable of traveling parallel to itself, between a rest position, in which it is attached to the vertical surface, and an operative position, in which it is essentially separated from said vertical surface, according to respective descent and ascent movements, the staircase being (1) ) provided with stop means of the descent movement, characterized in that it comprises at least two pairs of coplanar spacer bars (4), articulated at one end to the vertical surface, by means of respective pins (5) traversing simultaneously at least one slot (6) of the spacer bar (4) and a support part (22), adapted to be fixed to the vertical surface and provided with ears (7) perpendicular to the upper surface. Vertical surface, the opposite end of each spacer bar (4) being articulated to the corresponding spar (2); because said stop means are constituted by respective end edges (8) of the spacer bars, which are operative when, in the downward movement of the ladder (1) so that it acquires its operative position, they come into contact, substantially in a manner simultaneous, with complementary and opposite edges of the stringers (2); and in that the stringers comprise, for each spacer bar, a respective essentially l-shaped locking recess (9), located below the corresponding articulation of the spacer rod with the stringer, at a distance approximately equal to the distance between said spacer bars. Articulation and the slit (6) of the corresponding spacer bar (4) and adapted to receive and block the corresponding pin (5) of a spar (2), when the ladder is in rest position. (Machine-translation by Google Translate, not legally binding)