| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a double-acting mechanism that can be operated by a single driving source and to downsize the double-acting mechanism by preventing its dimensional change during operation. <P>SOLUTION: A driving force converting mechanism 18 includes: a rod 20 provided inside a body 12 so as to be axially freely displaceable; a first roller 44 and a second roller 46 that are paired with each other and provided on the rod 20; an inner cam 48 provided on an outer circumferential side of the rod 20; and an outer cam 50 provided on an outer circumferential side of the inner cam 48. The inner cam 48 is provided so as to be rotatable under driving force of a driving source 14. After the inner cam 48 is rotated and displaced to thereby displace the rod 20 axially upward along a first cam groove 76 in which the first roller 44 is inserted, the second roller 46 is moved from a vertical portion 80 to a horizontal portion 82 in a second cam groove 78 of the outer cam 50, so that the rod 20 starts to be displaced in a rotational direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
