| 摘要 |
<p>In the fight against fire, the assembly of head and sliding doors of railway vehicles must withstand for 30 minutes a fire coming from the adjacent vehicle to allow for the escape of passengers through the exit doors. In the presence of fire, the door in the junction zone between the movable wings proves very vulnerable, where deformations occur due to thermal expansion, resulting in the passage of fire and smoke into the vehicle. The invention (Fig. I and 2) solves this problem by mechanically locking together the wings in the zone of maximum deformation. This is accomplished by two handles of tubular shape, each one connected to a sliding wing (Fig. 3 and 4) such that they are coaxial, superimposed, and slightly spaced apart. The upper handle contains the thermal sliding bar, the melting of the low-melting alloy (Fig. I Seg. 2) allows the spring to extend, allowing the bar 6 to be inserted into the lower handle (Fig. 4), which thus becomes integrated with the upper one. <IMAGE></p> |
