Patent ID: 7156009

Claim:
A die device comprising: a cylindrical punch guide; a punch body provided in the punch guide so as to freely move up and down, the punch body having a punch blade portion on its lower end; a disc shaped stripper plate detachably provided on a lower end of the punch guide, the disc shaped stripper plate encircling the punch blade portion; an engagement groove formed on an outer peripheral surface of the stripper plate; an oscillation locking piece provided with a latch portion being freely engaged with the engagement groove on its lower end, the oscillation locking piece being provided on a lower end of the punch guide so as to freely oscillate to an inside-outside direction and being energized to the outside direction; and a turning ring having a locking piece pressuring portion for pressuring the oscillation locking piece to the inside direction against the energizing force in order to engage the latch portion of the oscillation locking piece with the engagement groove of the stripper plate, the turning ring being provided to a lower end of the punch guide rotatively, wherein in the above configuration, a locking member being engaged with an engagement concave portion provided on the turning ring so as to fix the turning ring is provided on the punch guide.