Tensioning device for cold mountain and development

摘要

A device for feeding a workpiece to the saw component of a sawing machine and for clamping the workpiece during the cutting thereof by the saw component, has first and second clamping jaws supported on a table of the sawing machine and cooperating with one another for immobilizing the workpiece; and a feed roller supported at the machine table in the zone of the clamping jaws for feeding the workpiece into the operational range of the saw component. The device further has an arrangement connected to the first clamping jaw for displacing the same towards and away from the second clamping jaw in a direction inclined with respect to the surface of the machine table. In this manner the first clamping jaw can be set at a relatively short distance from the surface of the machine table into a closed position in which it presses the workpiece against the second clamping jaw and further, the first clamping jaw can be set at a relatively large distance from the surface of the machine table into an open position in which it releases the workpiece. The device further has an arrangement coupled to the feed roller for moving the same into an operative position simultaneously with the displacement of the first clamping jaw into its open position and for moving the feed roller into an inoperative position simultaneously with the displacement of the first clamping jaw into its closed position. In the operative position the feed roller projects, at least partially, beyond the surface of the machine table for engaging and advancing the workpiece and in the inoperative position the feed roller is in a withdrawn state below the surface of the machine table.