Title:
BOOSTING DEVICE FOR VEHICLE FOR HIGH-LIFT WORK
Document Type and Number:
Japanese Patent JP2017223335
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a boosting device for a vehicle for high-lift work capable of cancelling a boosted state without the necessity to separately perform an operation even in the case where a failure occurs in detection means for detecting a pressure.SOLUTION: The present invention relates to a boosting device 12 for a vehicle for high-lift work configured to supply a boosted working fluid to a hydraulic tool 100. The boosting device comprises: a supply oil path 15 connecting a booster chamber 13a of a booster cylinder 13 with the hydraulic tool; a changeover valve 17 for pre-compression; and a changeover valve 24 for main compression. A pressure sensor 14 is provided in the booster chamber 13a. While the changeover valve 24 for main compression is switched to a state where a working fluid is supplied through a boosted oil path 26 to a head-side oil chamber 13c of the booster cylinder 13, if a detection value of the pressure sensor 14 does not achieve a main compression reference value and a time from starting supplying a working fluid through the boosted oil path 26 to the head-side oil chamber 13c of the booster cylinder 13 exceeds a predetermined time, the changeover valve 24 for main compression is switched to a state where a working fluid is supplied through a pressure-reduced oil path 25 to a rod-side oil chamber 13b of the booster cylinder 13.SELECTED DRAWING: Figure 2
Inventors:
MIKI TOSHIHIKO
KAWAI KIYOTAKA
MATSUMOTO TAKUYA
ASO YOSHINARI
KAWAI KIYOTAKA
MATSUMOTO TAKUYA
ASO YOSHINARI
Application Number:
JP2016121025A
Publication Date:
December 21, 2017
Filing Date:
June 17, 2016
Export Citation:
Assignee:
TADANO LTD
International Classes:
F15B20/00; B66F9/22; B66F11/04; F15B3/00; F15B11/028
Attorney, Agent or Firm:
Yanouchi Foreign Patent Office