KNIFE CYLINDER, ROTARY DIE CUTTER, AFFIXATION DEVICE FOR BLADE MOUNTING BASE, AND AFFIXATION METHOD FOR BLADE MOUNTING BASE

摘要

Provided are a knife cylinder, a rotary die cutter, a fixation device for a knife mounting base, and a fixation method for a knife mounting base. A knife cylinder is provided with a restraint part (71) disposed within a fixation hole (49) so as to be movable in the axial direction and so as not to be rotatable in the circumferential direction; a compression coil spring (73) for pressing the restraint part (71) inwardly of the fixation hole (49); an operating part (72) having a base end section provided with a dish section (101) which can engage with a knife mounting base (45), the operating part (72) also having a front end section entering the inside of the restraint part (71) through a mounting hole (48); a protrusion (74) provided to the restraint part (71); a helical groove (75) provided in the operating part (72), the helical groove (75) engaging with the protrusion (74) and being configured so that, when the operating part (72) rotates, the helical groove (75) can move the restraint part (71) from a first position to a second position against the pressing force of the compression coil spring (73); and a blocking groove (76) provided in the outer surface of the operating part (72) and blocking the rotation of the operating part (72) in the reverse direction when the restraint part (71) is located at the second position.