Patent ID: 6328507
Filing Date: 2001-12-11
Classification: B23Q,B25B,Y10T

Abstract:
A working table apparatus for a cutting machine tool comprising a working table slidably mounted on a bed of the machine tool, and a multiplicity of cylindrical positioning pins mounted on an under side of the working table and being selectively projectable from and retractable into a work supporting surface of the working table, and control means for selectively controlling the positions of said multiplicity of positioning pins for permitting said positioning pins to be projected from the surface of the working table; wherein said positioning pins comprise a first group of positioning pins including a first plurality of positioning pins arranged in a row either in a direction parallel with the sliding direction of the working table or in a direction perpendicular thereto and a second plurality of positioning pins arranged in a row perpendicular to said first plurality of positioning pins; and at least two additional second and third groups of positioning pins comprising a third and fourth plurality, respectively, of positioning pins each of said third and fourth plurality arranged in a row and positioned parallel to and spaced from said first plurality of positioning pins; and wherein said control means is adapted to simultaneously actuate said first group of positioning pins so that they are simultaneously projected from and retracted into the working table; and further wherein said control means further includes separate holding means associated with each of said at least two additional groups for selectively holding each of said additional groups of positioning pins in their retracted positions.