| 摘要 |
<p>An extendable rotary knife wherein the durability of a blade mounting structure is increased remarkably by applying a load uniformly on an entire blade and an erroneous dropping of the blade from the rotary knife can be prevented by providing a sufficient sharpness and sweeping width, whereby recessed parts (11) which are recessed inward from a circle C formed by connecting the pivot shafts (3) of the blades (2) are formed linearly in a rotating body (1) at an angle of α which is over a right angle relative to the blades (2) extending in a normal line direction.</p> |
