BOOSTING DEVICE FOR VEHICLE FOR HIGH-LIFT WORK

PROBLEM TO BE SOLVED: To provide a boosting device for a vehicle for high-lift work capable of supplying a working fluid of an arbitrarily determined pressure to a hydraulic tool.SOLUTION: The present invention relates to a boosting device for a vehicle for high-lift work comprising: a supply oil path 15 connecting a booster chamber 13a of a booster cylinder with a hydraulic tool 100; first pressure detection means 14 for detecting a pressure in the booster chamber; an electromagnetic changeover valve for pre-compression for supplying a working fluid to the supply oil path; an electromagnetic changeover valve for main compression configured switchable from a state where the working fluid is supplied through a boosted oil path to a head-side oil chamber 13c of the booster cylinder to a state where the working fluid is supplied through a pressure-reduced oil path to a rod-side oil chamber 13b of the booster cylinder if a detection value of the first pressure detection means is a predetermined value; and second pressure detection means 32 for detecting a pressure of the working fluid to be supplied to the hydraulic tool. The predetermined value of the first pressure detection means is adjusted in such a manner that a peak pressure which is detected by the second pressure detection means becomes a target value.SELECTED DRAWING: Figure 9 【課題】任意に定めた圧力の作動油を油圧工具に供給することができる高所作業車用の増圧装置を提供する。【解決手段】高所作業車用の増圧装置であって、増圧シリンダの増圧室１３ａと油圧工具１００とを接続する供給油路１５と、前記増圧室の圧力を検出する第一圧力検出手段１４と、前記供給油路に作動油を供給する予圧用の電磁切換弁と、前記第一圧力検出手段の検出値が所定値のときに、前記増圧シリンダのヘッド側油室１３ｃに増圧油路を通じて作動油を供給する状態から、前記増圧シリンダのロッド側油室１３ｂに減圧油路を通じて作動油を供給する状態に、切り換え可能に構成される本圧用の電磁切換弁と、前記油圧工具に供給される作動油の圧力を検出する第二圧力検出手段３２と、を具備し、前記第二圧力検出手段によって検出される最高圧力が目標値となるように前記第一圧力検出手段の所定値を調整する。【選択図】図９