Title:
CRANE
Document Type and Number:
Japanese Patent JP2017154844
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To shorten time in which a pressure accumulating device accumulates a pressure to a regulated pressure, the pressure accumulating device accumulating a pressure for allowing a restriction release device for releasing the restriction on the operation of a winch device to perform a releasing operation when an operator starts work.SOLUTION: A crane includes a restriction release device for releasing the restriction on the operation of a winch device by a pressure oil discharged from a pilot pump being supplied, and includes: a control valve having a cut-off position for cutting off the flow of the pressure oil discharged from the pilot pump, and a permission position for allowing the pressure oil discharged from the pilot pump to be supplied to the restriction release device; a first pressure accumulating device provided between the pilot pump and the control valve; and a second pressure accumulating device provided between the control valve and the restriction release device.SELECTED DRAWING: Figure 2
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Inventors:
MIYAZAKI ITARU
Application Number:
JP2016038251A
Publication Date:
September 07, 2017
Filing Date:
February 29, 2016
Export Citation:
Assignee:
HITACHI SUMITOMO HEAVY IND CONSTRUCTION CRANE CO LTD
International Classes:
B66D5/26; B66C13/20
Attorney, Agent or Firm:
Patent Business Corporation Takewa International Patent Office