| 摘要 |
<p>PROBLEM TO BE SOLVED: To operate each operating valve in order to be decided so as to prevent operating delay by providing with third piping for supplying operating liquid of high pressure from an accumulator to an operation control valve as a third operating liquid not through second piping. SOLUTION: Piping 23 is branched from the vicinity of the accumulator of high voltage piping 15, and high pressure oil is supplied from the accumulator 5 to an operation control valve 30. Since the piping 23 is connected to the vicinity of an accumulator 5, pressure fluctuation generated by the operation of a feed valve 12 and a discharging valve 13 is absorbed by the accumulator 5 if the pressure fluctuation is transferred through the high voltage oil piping 15, and thereby, high pressure oil having small pressure fluctuation is supplied to an auxiliary feed valve 38 and an operating valve 39. The delay of an advancing timing is eliminated in a differential piston 3, each operating valve is operated in order to be decided so as to provide a liquid-operated device for preventing operating delay.</p> |
