Patent ID: 6206767
Filing Date: 2001-03-27
Classification: B24B

Abstract:
A surface processing machine comprising:an upper surface plate;a lower surface plate;a plurality of carriers meshed with a sun gear and an internal gear disposed in a horizontal plane, each of the carriers having a toothed surface formed around the outer periphery thereof and a plurality of workpiece holding holes formed therein, the carriers executing planetary motions by rotating the sun gear and the internal gear with the front and back surfaces of the carriers clamped between the lower surface plate and the upper surface plate, vertical movement of the upper surface plate being performed with simultaneous relative movement of the lower surface plate and the upper surface plate with respect to the carriers;at least one rotation preventing pin disposed on the upper surface of the upper surface plate in proximity to the outer periphery thereof;a stopper supported by a machine main body for stopping the rotation of the upper surface plate by abutment against a side of the rotation preventing pin;a support member fixed to the upper surface plate;a first pulley group supported by a plurality of rotating shafts projecting from a side the support member;a suspension plate movable in vertical direction;a second pulley group supported by a plurality of rotating shafts projecting from a side of the suspension plate; andan endless wire cable stretched between the pulleys of the first pulley group and the pulleys of the second pulley group so as to equally support the vertical load of the upper surface plate.