| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve device preventing foreign matter from entering from an output port into a downstream side in association with separation of a specific land portion from a valve slide hole. SOLUTION: This valve device includes a valve body 10 having ports 12a to 12e, and a valve spool 20 having land portions 21 to 23. The first land portion 21 is changed to a state in which it slides in the valve slide hole 11 and a state in which it separates from the valve slide hole 11 according to the movement of the valve spool. The second land portion 22 located adjacently to the first land portion 21 slides in the valve slide hole 11 regardless of the movement of the valve spool. A flange portion 51 partitioning a passage hole 14 between the land portions 21, 22 into a first passage portion 14a on the side of the first land portion 21 and a second passage portion 14b on the side of the second land portion 22 and communicating them with each other, is provided between the land portions 21, 22. When the first land portion 21 is separated, the flange portion 51 maintains such a state that the second passage portion 14b is formed in the valve slide hole 11. COPYRIGHT: (C)2009,JPO&INPIT
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