| 摘要 |
PROBLEM TO BE SOLVED: To provide positive perforation of holes with a simple structure even when protruding states of each punch blade are somewhat bad. SOLUTION: In this perforating punch, a plurality of punch blades 2 are protrusively suspended from a supporting block 1 and a plurality of holes are concurrently perforated by moving each punch blade together with the supporting block and pressing it against a sheet-like object B. It is composed by forming in parallel a plurality of installation holes 11 comprised by providing screw nuts 3 on the supporting block, screwing screw rods 4 so that it can freely threadably move composed by forming screws on outer circumferences of the screw nuts, providing punch blades 2 on tips of the screw rods and interposing compression springs 5 between the punch blades and the supporting block.
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