| 摘要 |
PROBLEM TO BE SOLVED: To provide a pierce piercing selector apparatus both the structure and the operation of which are simple and with which the presence or absence of piercing is surely selected. SOLUTION: In a pierce piercing device for forming prescribed pierced holes on a blank B with a plurality of punches 53 belonging to the upper die 51 of a press and the same number of punching bushes 56 belonging to a die 55 placed on a lower die, in this piercing selector, the punches 53 are supported with a floating box 57 having relief spaces 55 of the punch providing in the lower part of the upper die 51 in the upper part and also a plug plate mechanism 59 for selectively plugging the relief spaces of the punch for individual pierced hole of the blank by rotation is built in the box. Both the structure and the operation are simple and the presence or absence of the piercing is surely selected. COPYRIGHT: (C)2004,JPO&NCIPI
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