| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reverse rotation preventing mechanism which attains a cushion function not by a servo motor and a stepping motor required for a controller but by ON/OFF of a mere DC motor equal to valve operation of an air cylinder, and attains high thrust, high speed, a self holding function and the like by ON/OFF of a mere DC motor without using a decelerator or a brake mechanism and in which reverse rotation is prevented (holding of thrust is possible) in an OFF state of a current. <P>SOLUTION: A linear movement distance of a retainer 3 is 1/2 times as long as a movement distance of an output member and the maximum thrust of the retainer 3 is twice as large as that of the output member. Thereby, when force is applied to the retainer 3 in an axial direction by compression springs 8 and 9, a cushion function, reverse rotation prevention and penetration prevention are made possible. <P>COPYRIGHT: (C)2012,JPO&INPIT |
