Unitary panel for the floor of a vehicle, floor, and vehicle including such a unitary panel

A unitary floor panel (1) for a transportation device comprising:

• a self-supporting plate (2), the self-supporting plate having an upper end and a lower end;
• at least one beam (5) fastened to the lower end of the self-supporting plates (2) and having an aperture located on an end of each beam forming a housing (11);
• a dual-function member (10) that interconnects with the housing (11) of the self-supporting plate (2), the dual-function member (10) including:
• a base (39) adapted to be fastened to a structural framework element (9) of the transportation device;
• a protruding part (40) placed over the base (39) that slides into the housing (11) of the beam (5) securing the self-supporting plate (2);
• wherein each beam (5) has at least one hollow segment (6) with a polygon-shaped cross section;
• wherein each hollow segment (6) has a trapezium-shaped cross section and has a flat adherent wall (12), extending in face of and making contact with the self-supporting plate (2), and a free wall (13), opposite the flat adherent wall (12) and parallel to the adherent wall (12);
• wherein the unitary panel contains a plurality of mortises (7) passing through the self-supporting plate (2);
• wherein each mortise (7) in the unitary panel (1) receives a fastening device (100), the fastening device (100) secures the fastening member (8) to the upper end (20) of the unitary panel (1), said fastening device (100) comprising:
• a clamping member (102) comprising a clamping jaw (105), shaped to pass through the mortise (7) and to bear on an internal side (107) of the adherent wall (12) extending facing the space (14) inside the beam (5) of the unitary panel (1) and comprising an attaching device (104) for fitting the fastening member (8) to the upper side (20) of the unitary panel (1);
• and
• a pin (108) for anchoring the fastening device (100) to the unitary panel (1),
• which anchoring pin (108) rotates as one with the clamping member (102) and comprises an anchoring jaw (109), adapted to bear on the upper side (20) of the unitary panel (1),
• said clamping member (102) adapted to move in translation relative to the anchoring pin (108) between:
• a clamped position of a fastening device (100), in which the clamping jaw (105) is returned toward the anchoring jaw (109) by elastic return means (112) and in which the clamping jaw (105) makes contact with the internal side (107) of the adherent wall (12) and the anchoring jaw (109) makes contact with the upper side (20) of the unitary panel (1);
• and
• an installation position of the fastening device (100), in which the clamping jaw (105) and the anchoring jaw (109) are further apart from each other relative to the clamped position.