Patent ID: 7897101

Claim:
Plant for the heat treatment of metallic elements (E), including: at least a chamber ( 3 ) for containing said metallic elements (E), said chamber ( 3 ) having at least an access opening (A 1 ); a heater ( 4 ) of said chamber ( 3 ), operating on the chamber ( 3 ) for bringing the same at a predetermined temperature; a conveyor ( 15 ), connected with a respective actuator and suitable for acting on the metallic elements (E) for transferring these latter exiting and/or entering with respect to said chamber ( 3 ); said conveyor ( 15 ) being positioned outside said chamber ( 3 ) during at least a step of the functioning of the plant ( 1 ); at least a support element (V) for said metallic elements (E), associated with a respective chamber ( 3 ) and movable between a first position, in which it is at least partly inserted within said respective chamber ( 3 ), and a second position in which it is at least partly extracted from said respective chamber ( 3 ), said conveyor ( 15 ) being suitable for acting on said support element (V) for moving said metallic elements (E); a displacer ( 8 ), outside said chamber ( 3 ) and operating on the conveyor ( 15 ) for positioning the same in correspondence of the access opening (A 1 ) of said chamber ( 3 ), the displacer ( 8 ) including a lifter ( 30 ), movable between an operating position, in which it is structured so as to engage the metallic elements (E), at least for lifting them with respect to the support element (V) when the support element (V) is in the respective second position, and a resting position, in which it is not operating on the metallic elements (E), and a holder ( 41 ), movable between an operating position, in which it is structured so as to hold the metallic elements (E) in a lifted position relative to the lifter ( 30 ) when this latter is in the respective resting position, at least for allowing to a support element (V) to be displaced below said holder ( 41 ); and a resting position, in which said holder ( 41 ) is not operating on the metallic elements (E), wherein said displacer ( 8 ) includes at least a first guide surface ( 14 ) defining a transport direction (W) of said support element (V) between said first and second positions, said support element (V) having rolling elements ( 5 ) for engaging said first guide surface ( 14 ), and wherein said displacer ( 8 ) includes a pair of second guide surfaces ( 17 ) parallel to said first guide surface ( 14 ), said conveyor ( 15 ) includes at least a gripping element ( 15 a ), which can be movably and stably engaged with said support element (V) and sliding along said second guide surfaces ( 17 ) for moving the support element (V) between the respective first and second positions.