Abstract: A crimping head (2) is hinged, at the upper part, on a horizontal pin (4) mounted at the end of a connecting rod pivotally bearing on a central vertical post (12). This pin enables the head to adopt a position inclined towards the rear of the machine, through the action of a small jack (5), in such a way that its lower end is moved away from the shaped support block (6) serving to hold the fastener in position on the support plate (1).

Abstract: The machine comprises two independent fastening stations. The first station (2), designed to assembly the corners of the frame separately and successively, is provided with two cutting heads (3, 7) for cutting the mouldings (5, 9) forming the corner of the frame, as well as with a fastening head (11) and devices with stops (6, 10) and jaws (14) for holding mouldings in position. The second station (15), designed for final assembly of the frame, is provided with two fastening heads (19, 20) installed facing each other along the diagonal of the frame to be produced.