| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that a conventional rotor projective frame is easily separated at a part divided into two when being rotated by winding driving.SOLUTION: A rotor protective frame 10 comprises a right frame 10a and a left frame 10b. A join line made on an outer peripheral surface 12 and an inner peripheral surface 11 by joining the right frame 10a and the left frame 10b are fit into each other with a shape of ruggedness, a zigzag, a wave or their combination to cross a linear part with which a transmission belt is brought into contact at their opposite sides. |
