| 摘要 |
PROBLEM TO BE SOLVED: To reduce a burden to a user by engaging a blade and a blade supporting structure with each other along a bearing contact position to be positioned separately in a direction in parallel with a shaft so that the blade is stabilized at both ends in the radial direction and in the axial direction when a knife works. SOLUTION: A blade support structure 16 is supported free to rotate around a central shaft 22 of a blade 12 as its center, and the blade and the blade support structure are devised to be engaged with each other at a bearing position positioned separately in the axial direction. The blade support structure 16 forms a divided ring type structure constituted of a ring curved body part and a fitting part 32. The ring curved body part maintains the blade in a state combined with a knife while supporting the blade so that the blade can stably rotate in low friction and at high speed even when various force is applied on it while the knife works. Consequently, it is possible to minimize friction and heating of the blade at the time when the knife works and to stabilize the position of the blade. |
