| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the core material of an impeller capable of sufficiently imparting the torque from a rotary shaft to the impeller and capable of being operated stably, the impeller and a stirrer. <P>SOLUTION: Torque transmitting surfaces TP1, TP2 or the like, which circumferentially cross the rotary shaft and have widths in the axial direction of the rotary axis, among the outer peripheral surfaces of the protruded parts 34 of the core material 3 and inner peripheral surfaces of the hole parts 35 of the protruded parts 34 are formed around the rotary shaft in a rotationally symmetric state and the circumferential forces F1, F2 or the like of the rotary shaft are transmitted to a fiber reinforced resin through the torque transmitting surfaces TP1, TP2 or the like. At that time, when the angle formed by the circumferential force F1 of the rotary shaft and the torque transmitting surface TP1 is set to θ and the angle formed by the circumferential force F2 of the rotary shaft and the torque transmitting surface TP2 is set to ω, the angles θ and ω become an acute angle larger than 45° or a right angle. <P>COPYRIGHT: (C)2010,JPO&INPIT |
