Patent ID: 8387500

Claim:
A scrap floating prevention mechanism, comprising: a die holder holding a plurality of dies for punching a plate-like workpiece, the die holder being formed with a plurality of first communication pipes for sending compressed fluid, the first communication pipes being associated with the plurality of dies, respectively; a punch holder holding a plurality of punches for punching the workpiece, one of the plurality of punches configured to be selected to punch the workpiece in cooperation with one of the plurality of dies at a work position; a mounting table on which the die holder is placed and fixed, the mounting table being formed with a plurality of second communication pipes which are configured to communicate with the plurality of first communication pipes, respectively, for sending the compressed fluid; a fluid injecting member provided below each of the plurality of dies, the fluid injecting member being formed with a plurality of inclined injecting pipes for injecting the compressed fluid; a striker configured to be moved to the selected one of the plurality of punches to strike the selected one of the plurality of punches; a striker position controller configured to detect and control a position of the striker; and a switching valve, controlled by the striker position controller, configured to selectively send the compressed fluid only to the one of the plurality of second communication pipes corresponding to the one of the plurality of dies that is to punch the workpiece together with the selected one of the plurality of punches, wherein the injecting pipes inject the compressed fluid sent from the switching valve via the one of the plurality of second communication pipes and the one of the plurality of first communication pipes downward in a space into which a scrap punched out by the selected one of the plurality of punches and the one of the plurality of dies drops, and the mounting table is a lower turret disk of a turret punch press.