| 摘要 |
PROBLEM TO BE SOLVED: To provide a punching device which is much compacted by simplifying the drive mechanism of a punching blade in terms of a mechanism and control.SOLUTION: The punching device has a rotary shaft body comprising two consecutive spiral grooves reverse to each other in winding on a punching-direction side, and an inductor coupled with a punching blade and engaged with the spiral grooves to convert the rotation of the rotary shaft body into the axial movement of the rotary shaft body itself. The rotation of the rotary shaft body allows the inductor to move one spiral groove in the punching direction to drop the punching blade, and allows the inductor to move the other spiral groove in a return direction to return the punching blade. Alternatively, the punching device has a rotary shaft body comprising two consecutive spiral grooves reverse to each other in winding on the return-direction side, and an inductor engaged with the spiral grooves to convert the rotation of the rotary shaft body into the axial movement of the rotary shaft body itself. The rotation of the rotary shaft body allows the rotary shaft body having the inductor engaged with one spiral groove to move in the punching direction to drop the punching blade, and allows the rotary shaft body having the inductor engaged with the other spiral groove to move in a return direction to return the punching blade. |
