Floor structure provided with a fire protection system for railway vehicles
A floor structure is provided with an underframe, which is part of a carriage body, is elongated along a longitudinal axis coinciding with the advancement axis of such carriage, and has a plurality of longitudinal attachment rails arranged on an area of the lower surface of the underframe; the attachment rails project downwards so as to define therebetween a plurality of compartments, which are engaged by panels having insulating material to form a fire protection system; such a system has, furthermore, a plurality of section bars, which are attached to the attachment rails and are shaped so as to retain the panels in fixed positions in the compartments and, at the same time, cover the attachment rails.
1. A floor structure for a railway vehicle, the floor structure comprising:
an underframe that is elongated along a longitudinal axis, coincident with an advancement axis of the railway vehicle; the underframe comprising a lower surface and a plurality of attachment rails arranged at least on an area of said lower surface; the attachment rails being parallel to said longitudinal axis and projecting downwards from said area, so as to define a plurality of compartments horizontally between said attachment rails;
a fire protection system that covers said area;
said fire protection system comprising:
a plurality of panels arranged in said plurality of compartments;
a plurality of section bars fixed to said attachment rails; said plurality of section bars being shaped so as to retain said plurality of panels in fixed positions in said compartments and, simultaneously, cover said attachment rails;
wherein each of said panels comprises a respective metal container and respective insulating material;
wherein said metal containers are closed containers containing the insulating material.
2. The floor structure according to claim 1 , wherein said closed containers and said section bars are made of stainless steel.
3. The floor structure according to claim 1 , wherein all said closed containers have the same length.
4. The floor structure according to claim 1 , wherein said closed containers have a lower surface that is embossed.
5. The floor structure according to claim 1 , wherein said section bars are fastened to said attachment rails metal mechanical elements.
6. The floor structure according to claim 1 , wherein each said section bar comprises respective intermediate wall, which is substantially horizontal; each of said intermediate walls being arranged under a respective one of said attachment rails and having an upper surface covered by a strip of fire barrier material.
7. The floor structure according to claim 1 , wherein all of said closed containers have the same width, less than the distance between two adjacent attachment rails.
8. The floor structure according to claim 1 , wherein said closed containers have a height less than that of said attachment rails and wherein said section bars have an upside-down omega-shaped cross-section.
9. The floor structure according to claim 1 , wherein said underframe is composed of extruded elements made in aluminium alloy, and wherein said attachment rails constitute part of said extruded elements.
10. The floor structure according to claim 1 , wherein, for at least some of said panels, each of said closed containers is formed by two half-shells which are attached to one another so as to fully enclose the insulating material.