Patent ID: 7997887
Filing Date: 2011-08-16
Classification: B26D,B29B

Abstract:
1. A cutter device comprising: a cutter shaft; a fixing holder comprising: a first through hole that holds the cutter shaft; and a fixing-holder-side engaging portion on a spherical outer circumferential surface thereof; a spherical cylinder comprising: a second through hole, which includes a first spherical-cylinder-side engaging portion provided on an inner circumferential surface thereof, and which holds the fixing holder; and a second spherical-cylinder-side engaging portion provided on a spherical outer circumferential surface thereof at a position shifted around a rotational axis with respect to the first spherical-cylinder-side engaging portion; and a cutter holder comprising: a third through hole, which includes a cutter-holder-side engaging portion provided on an inner circumferential surface thereof, and which holds the spherical cylinder; and a plurality of cutter blades for cutting resin, wherein the fixing holder and the spherical cylinder are connected to each other by keys having side surfaces cooperating with side surfaces of associated key grooves to provide a surface contact between the fixing-holder-side engaging portion and the first spherical-cylinder-side engaging portion so that rotary torque of the fixing holder is transmittable to the spherical cylinder, the keys configured to slide linearly along the associated key grooves in a direction intersecting with a direction in which the rotary torque of the fixing holder is transmitted, and wherein the spherical cylinder and the cutter holder are connected to each other by surface contact between the second spherical-cylinder-side engaging portion and the cutter-holder-side engaging portion so that rotary torque of the spherical cylinder is transmittable to the cutter holder, the spherical cylinder and the cutter holder being turnable to each other in a direction intersecting with a direction in which the rotary torque of the spherical cylinder is transmitted.