| 摘要 |
PROBLEM TO BE SOLVED: To reduce the use number of an electromagnetic operation changeover valve of a wing opening/closing device of a wing vehicle.SOLUTION: A wing opening/closing device of a wing vehicle comprises: a pair of fore-and-aft left-shaft hydraulic cylinder devices 20, 30 arranged between a left wing and a wing body and a pair of fore-and-aft right-side hydraulic cylinder devices 20A, 30A arranged between a right wing and the wing body; a supply passage 13 for connecting the left-side hydraulic cylinder devices 20, 30, the right-side hydraulic cylinder devices 20A, 30A and a pump 12; a discharge passage 14 for connecting the left-side hydraulic cylinder devices 20, 30, the right-side hydraulic cylinder devices 20A, 30A and a tank 15; an elongation/contraction directional control valve 40 which controls the elongation or contraction of the left-side hydraulic cylinder devices 20, 30 and the elongation or contraction of the right-side hydraulic cylinder devices 20A, 30A; and a selection directional control valve 50 which controls the connection of the left-side hydraulic cylinder devices 20, 30 or the connection of the right-side hydraulic cylinder devices 20A, 30A. |
