| 摘要 |
PROBLEM TO BE SOLVED: To provide a brake device having stable braking force. SOLUTION: The brake member 30 is rotatably supported on a position for cushioning in terms of the traveling path of a blade driving member 13 driving a blade 11, the member 13 gives the member 30 torque in a left-turning direction after the engaging pin 18 of the member 13 is engaged with an arm 32, and the kinetic energy of the member 13 is converted to heat energy generated by the member 30 and attenuated. A cushioning member 34 exerts its influence of elastic force on a circular projecting piece formed on the member 30 when the projecting piece abuts on the member 34 having the elastic force; however, since the direction of the elastic force faces to the direction of the rotating shaft 31 of the member 30, the elastic force exerted by the member 34 to the member 30 does not generate torque with respect to the member 30, and the risk for reverse rotation by rebounding can be prevented.
|
