| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology effective for reducing the number of components in a cylinder control device. SOLUTION: A pilot check valve 13 for lifting for permitting or inhibiting the operation of a lift cylinder 10, is mounted on a main pipe conduit 12 of the shift cylinder 10. A pilot check valve 24 for tilting for permitting or inhibiting the operation of a tilt cylinder 20 is mounted on a main pipe conduit 22 of the tilt cylinder 20. The opening and closing of a pilot circuit 14 of the pilot check valve 13 for lifting, and a pilot circuit 25 of the pilot check valve 24 for tilting can be controlled by a single solenoid proportion valve 30 capable of switching three positions, that is, an initial position I, an intermediate stroke position II and a maximum stroke position III. COPYRIGHT: (C)2004,JPO&NCIPI
|
