DEVICE FOR BLOCKING PIECES TO BE WORKED AND MACHINE TOOL INCORPORATING AT LEAST ONE SUCH DEVICE

The present invention relates to a blocking device (5) for blocking panels or other workpieces, suitable for use in a working plane (3) of a machine tool (1) for machining panels or other workpieces, on the top of said blocking device (5) a top surface (12) being defined into which at least a first opening (13) leads, for the vacuum, connectable, in use, to means for generating the vacuum to allow, in use, the blocking of a panel or other workpiece on said blocking device (5) by means of the vacuum generated by said means for generating the vacuum at said top surface (12). In said top surface (12) flows at least a second opening (19) for compressed air flows into said top surface (12), which can be connected, in use, to a source of compressed air to allow, in use, removing dust and/or scraps and/or machining residues from at least one top area of said blocking device (5) expelling compressed air from said at least one second opening (19) at said top surface (12) through the use of said source of compressed air.