| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid valve, preventing a spool from being restored even if the air pressure becomes below a fixed value, whereby the spool can be smoothly operated to prevent malfunction of a device. SOLUTION: This solenoid valve includes: a valve body 1 provided with a plurality of ports 12 and a first air hole 13; a spool 2 for switching the flow of air pressure; a sealed part 3; a semi-pilot part 4; and an armature drum body 5. The sealed part 3 includes: a press-bonding chamber 31b; a second air hole 31a; a drum body 31 having a through hole 31c communicating with the second air hole 31a and the press-bonding chamber 31b; a plurality of pistons 32 mounted between both side surfaces in the press-bonding chamber 31b and the outer peripheral edge of the spool 2; and a plurality of rubber U-packings 33 mounted on the respective pistons 32 to prevent leakage of air pressure. COPYRIGHT: (C)2006,JPO&NCIPI
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