CRANE
To improve operability during a combined operation.SOLUTION: A crane has: a first control mode (independent mode) in which, when second operating means (26) is operated, a third control valve (132) is operated first, among a third control valve (132) and a fourth control valve (132-1), to supply pre...
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Zusammenfassung: | To improve operability during a combined operation.SOLUTION: A crane has: a first control mode (independent mode) in which, when second operating means (26) is operated, a third control valve (132) is operated first, among a third control valve (132) and a fourth control valve (132-1), to supply pressure oil from a first hydraulic pump (30) to a second actuator (131); and a second control mode (confluence mode) in which, after the fourth control valve (132-1) is actuated to supply the pressure oil from a second hydraulic pump (130) to the second actuator (131) when the second operating means (26) is operated, the third control valve (132) is operated to merge the pressure oil from the second hydraulic pump (130) with the pressure oil from the first hydraulic pump (30) and supply the pressure oil to the second actuator (131).SELECTED DRAWING: Figure 4
【課題】複合操作時に操作性を向上させる。【解決手段】本発明に係るクレーンは、第2操作手段(26)が操作されたときに第3制御弁(132)及び第4制御弁(132-1)の内、第3制御弁(132)が先に作動して第1油圧ポンプ(30)からの圧油を第2アクチュエータ(131)に供給する第1制御モード(独立モード)と、第2操作手段(26)が操作されたときに第4制御弁(132-1)が作動して第2油圧ポンプ(130)からの圧油を第2アクチュエータ(131)に供給した後に、第3制御弁(132)が作動して第2油圧ポンプ(130)からの圧油に第1油圧ポンプ(30)からの圧油を合流させて第2アクチュエータ(131)に供給する第2制御モード(合流モード)と、を有する。【選択図】図4 |
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