Multiple carving machine

Multiple working machine for the simultaneous working of a plurality of workpieces, including:

• a base,
• a work bench supported by the base and having a plurality of retaining members for pieces to be worked and for a pattern piece,
• a work frame in the form of a generally horizontal articulated parallelogram having a front side and a rear side, the work frame being movable above the work bench and carrying on its front side a plurality of working tools for the pieces to be worked and a feeler member for engagement with the pattern piece, and
• an articulated arm system interconnecting the rear side of the work frame and the base and including two symmetrical lateral linkages located vertically in correspondence with the sides of the work frame, each said linkage including an upper pin connected to the work frame, a lower pin and two side pins, four connecting rods articulated together in a rhombus by said pins, a shorter arm articulated at its upper end to the lower pin of the rhombus and at its lower end to the base about a first common horizontal axis, and two longer arms articulated at their upper ends to said pins of the rhombus and at their lower ends to the base about a second common axis located below said first axis, the distance between said first and second axes being equal to the distance between the first axis and the axis of said lower pin,
• wherein the improvements comprise
• (a) the said work frame comprises two adjacent half-frames, and respective front and rear connections interconnecting said half-frames along their front and rear sides, and a support structure extending above said connections between the two half-frames, and
• (b) the articulated arm system further includes a supplementary vertical central linkage, similar to said lateral linkages but inverted relative thereto, connecting the rear connection between said half-frames to the said support structure.