| 摘要 |
PROBLEM TO BE SOLVED: To operate both operation objects favorably in a case where a fork and a mast are simultaneously operated.SOLUTION: A flow rate control valve 34 is disposed between a hydraulic pump motor 30 and a proportional valve 32 for lowering a lift. At the flow rate control valve 34, pilot piping K9 is connected which imparts a back pressure of a proportional valve 37 for tilting as a pilot pressure. Thereby, the flow rate control valve 34 opens the valve by a pressure imparted through the pilot piping K9 at the time of simultaneous operation of a lowering operation of a lift cylinder 14 and an operation of one of a forward tilting operation or a backward tilting operation of a tilt cylinder 19. Then, the opened flow rate control valve 34 controls the flow rate by flowing hydraulic oil flowed out of a bottom chamber 14b of the lift cylinder 14 to an oil tank T. |
