| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a valve changing device capable of smoothly moving a changing slider block. <P>SOLUTION: This valve changing device is provided with a pair of valve seat parts 41 facing each other, a valve main body part 40, and the changing slider block 44 slidably provided in a changing slider block reciprocating space 43, and having seal surfaces on both sides of a sliding direction. Each valve seat part 41 is provided with a discharge port 46 communicating with a drive fluid discharge port 45, a feed port 47 on the other side to feed drive fluid from one side to the other side to drive a drive rod 33, and a feed port 48 on one side to feed drive fluid to drive a drive rod 43 from the other side to one side. The changing slider block 44 is provided with a communication zone 50. The drive rod 43 is provided with a changing pawl body 34 to be engaged with the changing slider block 44 to reciprocate the changing slider block 44 based on reciprocation of the drive rod 43. <P>COPYRIGHT: (C)2004,JPO</p> |
