Abstract: A method for monitoring operation of a winch having a motor driving a drum on which a cable is wound, the cable being able to be wound on several winding layers whose number varies depending on the winding and unwinding of the cable, the method implementing continuous monitoring of the number of winding layers of the cable on the drum while ensuring in real time at least the following steps: measuring a first parameter (P1) representative of a linear travel speed of the cable leaving the drum; measuring a second parameter (P2; P2?) representative of a rotation speed of the drum; and determining the number of winding layers of the cable depending on the first parameter and the second parameter. This method may find an advantageous application in the monitoring of winches of lifting device, and in particular cranes.

Abstract: A tension setting system for a remote setting of a tension in a transfer cable ensuring a displacement of a transfer carriage along a jib of a crane, including a winch equipped with a motor cooperating with the cable so as to ensure a displacement of the carriage, a pilot unit connected to the motor to pilot a displacement of the carriage, and a setting mechanical device mounted on the carriage and adapted to be actuated by the action of a displacement of the carriage. The setting mechanical device is coupled to the cable and configurable between a working configuration in which the mechanical device stands still irrespective of the displacement of the carriage and results in a holding of the tension in the cable, and a detent configuration in which, by the action of a displacement of the carriage piloted by the pilot unit according to a first sequence of reciprocating displacement, the mechanical device results in a release of the tension in the cable.

Abstract: A tension setting system for a remote setting of a tension in a transfer cable ensuring a displacement of a transfer carriage along a jib of a crane, including a winch equipped with a motor cooperating with the cable so as to ensure a displacement of the carriage, a pilot unit connected to the motor to pilot a displacement of the carriage, and a setting mechanical device mounted on the carriage and adapted to be actuated by the action of a displacement of the carriage. The setting mechanical device is coupled to the cable and configurable between a working configuration in which the mechanical device stands still irrespective of the displacement of the carriage and results in a holding of the tension in the cable, and a detent configuration in which, by the action of a displacement of the carriage piloted by the pilot unit according to a first sequence of reciprocating displacement, the mechanical device results in a release of the tension in the cable.