A device for winding a flexible tube, the device including two identical blades LA placed opposite ways round one against the other and pivotally secured to each other about their respective axes of axial symmetry, which together constitute a pivot axis PIV. One of the blades presents in its left edge an upwardly open notch EC that is formed by a first circular arc ARC1 having its origin at a connection point PR situated on the right edge of the notch and on the longitudinal axis LG of the blade; a diameter of the first circular arc lying on the longitudinal axis; and the first circular arc presenting a central angle α of not less than 180°.