Winding device for belts and ropes comprising: - a first element ; - a second element rotatably and removably connected to the first element and comprising fastening means of a belt or rope; - catching means connected to the second element to allow a user to manually rotate the second element and the fastening means to wind the belt or rope blocked by the fastening means , wherein the second element comprises a pin on which the fastening means are made, said pin being rotatably and removably connected to the first element to wind on the pin the belt or rope , characterized in that the pin comprises at least one housing in which a projecting element is inserted, rotatable on its axis and having a first external surface adapted to go out of the housing when the projecting element is rotated in a first position, thereby allowing to increase the diameter of the pin , and having a second plane external surface which remains inside the housing when the projecting element is rotated in a second position, to enable the belt to go out of the pin when it is wound, wherein the projecting element comprises a projection obtained next to the first element adapted to be inserted in a continuous circular seat obtained in the first element , to connect the first element and the second rotatable element , preventing a disengagement of the pin during the winding operation. - a first element ; - a second element rotatably and removably connected to the first element and comprising fastening means of a belt or rope; - catching means connected to the second element to allow a user to manually rotate the second element and the fastening means to wind the belt or rope blocked by the fastening means , wherein the second element comprises a pin on which the fastening means are made, said pin being rotatably and removably connected to the first element to wind on the pin the belt or rope , characterized in that the pin comprises at least one housing in which a projecting element is inserted, rotatable on its axis and having a first external surface adapted to go out of the housing when the projecting element is rotated in a first position, thereby allowing to increase the diameter of the pin , and having a second plane external surface which remains inside the housing when the projecting element is rotated in a second position, to enable the belt to go out of the pin when it is wound, wherein the projecting element comprises a projection obtained next to the first element adapted to be inserted in a continuous circular seat obtained in the first element , to connect the first element and the second rotatable element , preventing a disengagement of the pin during the winding operation. wherein the second element comprises a pin on which the fastening means are made, said pin being rotatably and removably connected to the first element to wind on the pin the belt or rope , characterized in that the pin comprises at least one housing in which a projecting element is inserted, rotatable on its axis and having a first external surface adapted to go out of the housing when the projecting element is rotated in a first position, thereby allowing to increase the diameter of the pin , and having a second plane external surface which remains inside the housing when the projecting element is rotated in a second position, to enable the belt to go out of the pin when it is wound, wherein the projecting element comprises a projection obtained next to the first element adapted to be inserted in a continuous circular seat obtained in the first element , to connect the first element and the second rotatable element , preventing a disengagement of the pin during the winding operation. <EOS>