ES141442U - Perfected sanding machine (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improved sander machine, of the type comprising a bench provided with free-spinning rollers combined with a feeder roller facing a mouth through which part of a sanding belt moved by rollers that rotate between two side walls, essentially characterized by the fact that the lower roller transmits reciprocating oscillating movements to said sanding belt through two plates hinged to each other by means of a shaft that has a keyed cam shaft combined with a tractor spring on whose cam a reducer acts, so that the action of the latter acts on said cam transmits oscillating movements to one of said plates that is related to the aforesaid roller, the latter being displaceable with respect to the upper roller through a crank set in one of the side walls of the machine which acts on a pinion that engages in the teeth of a rod anchored to the axis of the lower roller, produced endo displacements of the latter with respect to the first to allow the replacement of the sander belt, so that the tensioning of the latter is produced by driving another crank carrying a cam that rotates inside a ball bearing set in the repeated lower roller when tackling the latter to a new displacement and because in front of the feeder roller facing the mouth where part of the sander strip appears, it has a supplementary feeder roller that rotates at the same speed as that, avoiding the recoil produced by the plates when having contact with the sander belt when the feeder roller facing the latter is removing the last sheet worked. (Machine-translation by Google Translate, not legally binding)