Fastener for junction points of conveyor belts

Fastener for conveyor belt joints comprising an upper fixation plate (3) and a lower fixation plate (1), the two plates being linked together along one of their edges by hinge elements (2) in a U-shape, leaving between them spaces allowing similar hinge elements to be embedded belonging to another similar fastener, a linkage pin for articulation and linking being able to be introduced in the embedded hinge elements to create an articulated link between the fasteners, said fastener being provided with claws (4) which are part of the upper fixation plate (3), which are oriented towards the lower fixation plate (1) and which present a curve, or curves, whose cavity is oriented towards the hinge elements, characterised in that the lower plates (1) comprise on their side opposite the hinge elements (2) ports (5), said ports (5) being constituted of a small bar of the same material as that constituting the lower plate, oriented parallel to the edge of the lower plate situated opposite the hinge elements and raised in relation to the general plane of the lower plate, a shearing being made on each side of the small bar, the edge of the lower plate (1) situated opposite the hinge elements (2) being raised and presenting a curved profile, the claws (4) of the upper plate, the ports (5) and the raised edge (6) of the lower plate (1) being arranged respectively in such a way that when the fastener, originally open, is closed, the points of the claws (4) come into contact with the raised edge (6) with curved profile in its upper part, on the raised edge side with a curved profile oriented towards the hinge elements of the fastener.