Unit for locating in position plates of glass, marble, stone, wood, wood derivatives or the like on the work board of a machine for working the aforesaid plates, and machine provided with this unit

摘要

The units for locating in position (2) plates (L) of glass, marble, stone, wood, wood derivatives, or the like on the working surface (P) of a machine (M) for machining the plates (L) comprise a bottom suction-pad member (2a) for anchorage of the units (2) to the working surface (P). The chamber of the bottom suction-pad member of each unit (2) can be connected to a source of vacuum (S1) provided within the body (2) of the unit. The source (S1) is switchable into a mode where it functions as pressure source, for governing displacement into a raised, operative, position of a top locator member forming part of the unit (2). The locating units (2) form part of a machine that is also provided with units (1) for supporting and withholding the plates in position. These supporting units (1) are each provided with bottom and top suction-pad members (1a, 2a) connected to a source of vacuum (S1) situated inside the unit (1).