DEVICE TO ASSIST WITH UNLOADING A TRANSPORT TRAILER WITH ROLLER CONVEYOR

Loading box (1) integrable into a transport vehicle, comprising an unloading device with bottom belt (9) fixed at one of its ends to a winding drum (11) disposed under the unloading bay, around which it winds under the action of a first power system (13), and driving a mobile wall (6) fixed to its opposite end, characterized in that one or more chains (27) extending longitudinally around as many deflection sprockets (29) placed on a transverse axis situated under the unloading bay and as many drive sprockets (28) placed on a transverse axis disposed under the opposite end of the box, are linked to the mobile wall (6) by means of one or more connecting pieces (30) and are driven by a second power system (32) by means of a gear (31) actuating the drive sprockets (28) in a manner synchronized with the winding of the bottom belt (9) induced by the action of the power system (13) driving the winding drum (11).