Device to facilitate the fitting of abrasive belts to sanding machines,especially for wooden panels

摘要

A device to facilitate the fitting of abrasive belts envisages a guide element (8) mounted so it is axially parallel to rollers (4s, 4i) and linked by a four-point linkage mechanism to the free end of a supporting element (11) located inside a hollow space (7) in the machine; the linkage mechanism (12) move the guide element (8) in both directions between a plurality of intermediate positions in which the guide element is always parallel to the end rollers (4s, 4i), the three main positions being the following: a least extended rest position where the guide element (8) is completely inside the hollow space (7); a belt (3) loading/unloading position where the guide element (8) is partially outside the limits defined by the rollers (4s, 4i) and at a height (H1) less than the height of the top roller (4s) from the reference plane (P); and a fully extended, work position where the guide element (8) is completely outside the limits defined by the rollers (4s, 4i) and aligned with the top roller (4s) in such a way that its upper surface forms an extension of the roller itself.