| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a device for punching a punch hole on paper for reducing load to a driving system. SOLUTION: In this device, cams fitted at both end parts of a rotary shaft push down a pressure plate applied, with spring load punches different in length successively provided on the pressure plate are successively penetrated into paper and a punching is performed for paper between the pressure plate and a die plate.</p> |
