Detection device configured to detect the speed of rotation of a roller of a clamping device of a wire element comprising: - a body (6,7); - a first rotation shaft fixed to a body (6,7) - a roller mounted rotating around a first rotation shaft, the first rotation shaft defining a first axis of rotation for the roller; - a clamp fixed to the body (6,7) and having a first contact surface; - at least one member fixed to the roller so as to rotate around the first axis of rotation in an annular volume arranged between the first axis of rotation and the clamp, the at least one member having a second contact surface, the at least one member being mounted movable with respect to the first axis of rotation between a first member position in which a first distance between the first axis of rotation and a distal part of the second contact surface is smaller than a second distance between the first axis of rotation and a proximal part of the first contact surface and a second member position in which the first distance is greater than the second distance, rotation of the roller generating a centrifugal force designed to move the second contact surface away from the first axis of rotation to increase the value of the first distance so that the second contact surface is in contact with the first contact surface when the speed of rotation of the roller exceeds a threshold speed of rotation, the clamp blocking one direction of rotation of the roller when the first contact surface is in contact with the second contact surface; detection device characterised in that the member has a flyweight portion and a ratchet element arranged one after the other in a direction parallel to the first axis of rotation, the ratchet element comprising the second contact surface; in that, in the second member position, the flyweight portion is devoid of contact with the clamp; and in that a distal part of the flyweight portion is farther from the first axis of rotation than a distal part of the second contact surface in an observation along the first axis of rotation. - a body (6,7); - a first rotation shaft fixed to a body (6,7) - a roller mounted rotating around a first rotation shaft, the first rotation shaft defining a first axis of rotation for the roller; - a clamp fixed to the body (6,7) and having a first contact surface; - at least one member fixed to the roller so as to rotate around the first axis of rotation in an annular volume arranged between the first axis of rotation and the clamp, the at least one member having a second contact surface, the at least one member being mounted movable with respect to the first axis of rotation between a first member position in which a first distance between the first axis of rotation and a distal part of the second contact surface is smaller than a second distance between the first axis of rotation and a proximal part of the first contact surface and a second member position in which the first distance is greater than the second distance, rotation of the roller generating a centrifugal force designed to move the second contact surface away from the first axis of rotation to increase the value of the first distance so that the second contact surface is in contact with the first contact surface when the speed of rotation of the roller exceeds a threshold speed of rotation, the clamp blocking one direction of rotation of the roller when the first contact surface is in contact with the second contact surface; detection device characterised in that the member has a flyweight portion and a ratchet element arranged one after the other in a direction parallel to the first axis of rotation, the ratchet element comprising the second contact surface; in that, in the second member position, the flyweight portion is devoid of contact with the clamp; and in that a distal part of the flyweight portion is farther from the first axis of rotation than a distal part of the second contact surface in an observation along the first axis of rotation.