Frame to support pull-out and rotating racks for cabinets

An improved frame used to support pull-out and rotating racks for cabinets, of the type composed of:

• a cabinet (C) having a bottom (A) and a top (B),
• a rack (1) having a bearing structure with a crosspiece (3a or 3b),
• a lower semi-frame (TI) and an upper semi-frame (TS),
• a telescopic guide (4) with a sliding rod (4a),
• a cover (5) fixed to the sliding rod (4a) of the telescopic guide (4), and
• supporting mechanisms (6, 8, 10, 11, 12, 13) that guarantee a correct, safe movement of the rack,
• at least one boxed track (14), with U-shaped cross-section, which houses the telescopic guide (4), the cover (5) and the crosspiece (3a or 3b) of the bearing structure of the rack (1);
• the boxed track (14) having borders (14a), said boxed track suitable to be fixed on the bottom (A) or top (B) of the cabinet (C),
• the borders (14a) of said boxed track (14) being positioned, due to their height, close to the crosspiece (3a or 3b) of the rack (1), when the rack (1) is partially inserted or non completely pulled-out, said borders (14a) of the boxed track (14) being no more close to the crosspiece (3a or 3b) of the rack (1), when the rack (1) is completely pulled-out,
• wherein the supporting mechanisms used to guarantee the correct, safe movement of the rack (1) comprise a pair of small wheels (11) that idle around a vertical axis and are partially contained and sliding in corresponding support brackets (12) fixed at the two ends of the cover (5), in such a way that the small wheels (11) snap-in with corresponding stop and self-centering jaws (13), which rotate with the frame (1).