Title:
高所作業車用の増圧装置
Document Type and Number:
Japanese Patent JP6859637
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pressure increasing device for a high lift work vehicle enabling a disadvantage at the pressure increasing device to be detected.SOLUTION: This invention relates to a pressure increasing device for a high lift work for use in supplying hydraulic fluid of which pressure is increased by a pressure increasing cylinder to a hydraulic tool comprising a supply fluid passage connecting a pressure increasing chamber of the pressure increasing cylinder with the hydraulic tool; a pressure increasing hydraulic passage for guiding the hydraulic fluid to a fluid chamber at a head side of the pressure increasing cylinder; a pressure decreasing fluid passage for use in guiding the hydraulic fluid to the fluid chamber at a rod side of the pressure increasing cylinder; a preloading electromagnetic changing-over valve connected to the supply fluid passage; a main loading electromagnetic changing-over valve that is connected to the pressure increasing cylinder and constituted to be changeable between a state in which the hydraulic fluid is supplied to the fluid chamber at the head side of the pressure increasing cylinder through the pressure increasing passage and a state in which the hydraulic fluid is supplied to the fluid chamber at the rod side of the pressure increasing cylinder through the pressure decreasing fluid passage; and pressure detecting means for detecting a pressure of the pressure increasing chamber. When the maximum pressure detected by the pressure detecting means is out of a specified pressure range, this state is detected as a disadvantage state.SELECTED DRAWING: Figure 8
Inventors:
Kiyotaka Kawai
Toshihiko Miki
Yoshinari Aso
Takuya Matsumoto
Yuichi Kawamatsu
Naoto Kusanagi
Toshihiko Miki
Yoshinari Aso
Takuya Matsumoto
Yuichi Kawamatsu
Naoto Kusanagi
Application Number:
JP2016182127A
Publication Date:
April 14, 2021
Filing Date:
September 16, 2016
Export Citation:
Assignee:
Tadano Co., Ltd.
International Classes:
F15B20/00
Domestic Patent References:
| JP5079003U | ||||
| JP2014020543A | ||||
| JP2002310101A | ||||
| JP2015514947A | ||||
| JP2007285365A |
Attorney, Agent or Firm:
Yanouchi Foreign Patent Office