Title:
JACK DEVICE AND WORK MACHINE EQUIPPED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2022/070890
Kind Code:
A1
Abstract:
Provided is a jack device (20) that facilitates the work of changing the orientation of a jack cylinder (41) without using a device that actively changes the orientation. The jack device (20) comprises: an arm (30); a jack body (40) including the jack cylinder (41); and a reaction force-applying unit (60) supported by the arm (30). The reaction force-applying unit (60) applies reaction force moment to the jack body (40) over the entire orientation from the upright orientation to the retracted orientation in response to the force applied from the jack body (40). The reaction force-applying unit (60) applies reaction force moment (Mr) greater than self-weight moment (Ms) to the jack body (40) in the retracted orientation and reaction force moment (Mr) smaller than the self-weight moment (Ms) to the jack body (40) in the upright orientation.
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| JPH1036078 | DEVICE FOR DETECTING JACKUP OF OUTRIGGER |
Inventors:
ARITA RYUICHI
Application Number:
PCT/JP2021/033775
Publication Date:
April 07, 2022
Filing Date:
September 14, 2021
Export Citation:
Assignee:
KOBELCO CONSTR MACH CO LTD (JP)
International Classes:
B66C23/78; E02F9/08
Foreign References:
| JPH11100191A | 1999-04-13 | |||
| JPS4835515A | 1973-05-25 | |||
| JP2018177432A | 2018-11-15 | |||
| JP2019099349A | 2019-06-24 | |||
| JP2012116604A | 2012-06-21 |
Other References:
See also references of EP 4194388A4
Attorney, Agent or Firm:
KOTANI, Masataka et al. (JP)
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