Title:
高所作業車用の増圧装置
Document Type and Number:
Japanese Patent JP6784074
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pressure increasing device capable of selecting one mode from a plurality of modes and keeping the maximum pressure of working oil fed to a hydraulic tool constant even if an amount of working oil fed out by a working oil pump varies.SOLUTION: A pressure increasing device 12 for a high lift work vehicle 1 in which a mode selection part 41 is provided, comprises: a pressure sensor 14 for detecting a pressure of working oil fed to a hydraulic tool (100); and a controller 31 for controlling a solenoid changing-over valve 24 while recognizing pressure transition of the working oil on the basis of a signal from the pressure sensor 14. The controller 31 sets a threshold Pa in response to a selection state of the mode selection part 41, controls the solenoid changing-over valve 24 so as to change-over from a state in which the working oil is guided to a pressure increasing oil passage 26 to a state in which the working oil is guided to a pressure decreasing oil passage 25 when determining the pressure of the working oil to exceed the threshold Pa .SELECTED DRAWING: Figure 2
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Inventors:
Toshihiko Miki
Kiyotaka Kawai
Takuya Matsumoto
Yoshinari Aso
Kiyotaka Kawai
Takuya Matsumoto
Yoshinari Aso
Application Number:
JP2016123083A
Publication Date:
November 11, 2020
Filing Date:
June 21, 2016
Export Citation:
Assignee:
Tadano Co., Ltd.
International Classes:
F15B11/028; B66F9/22; B66F11/04
Domestic Patent References:
| JP2014020543A | ||||
| JP2012219653A | ||||
| JP2009281413A | ||||
| JP2008180274A | ||||
| JP4077598U | ||||
| JP6173903A | ||||
| JP57012471U | ||||
| JP2012013203A | ||||
| JP2009019689A | ||||
| JP2014159851A |
Attorney, Agent or Firm:
Yanouchi Foreign Patent Office