| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a valve operating device capable of significantly reducing workload on an actuator by holding a valve element at a position with hardly any dependence on output of the actuator. <P>SOLUTION: The valve operating device that includes a drive shaft 18, a drive lever 23 that is fixedly provided thereon and can rotate in a direction of movement of a valve element 8, a follower arm 24 that is fixedly provided on the valve element 8, a link 25, a first connecting shaft 26 that connects one end of the link 25 and the drive lever 23, and a second connecting shaft 27 that connects the other end of the link 25 and the follower arm 24. Along with a movement of the valve element 8 from a first position A to a second position B by rotation of the drive lever 23, a center 26c of the first connecting shaft 26 approaches from one side of a straight line 28 connecting two centers 18c, 27c of the drive shaft 18 and the second connecting shaft 27, and after the valve element 8 reaches the second position B, the drive lever 23 is rotated further by a predetermined angle so that the center 26c of the first connecting shaft 26 moves over a dead point on the straight line 28 to the other side. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
