A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
JACK DEVICE AND WORK MACHINE EQUIPPED WITH SAME
Provided is a jack device (20) rendering an operation of changing the posture of a jack cylinder (41) easy without using a device that actively changes the posture. The jack device (20) includes an arm (30), a jack body (40) including the jack cylinder (41), and a reaction-force application unit (60) supported by the arm (30). The reaction-force application unit (60) makes a reaction-force moment act on the jack body (40) in all postures from the upright posture to the storage posture in response to a force applied from the jack body (40). The reaction-force application unit (60) makes a reaction-force moment (Mr) greater than a self-weight moment (Ms) act on the jack body (40) in the storage posture and makes a reaction-force moment (Mr) smaller than the self-weight moment (Ms) act on the jack body (40) in the upright posture.
JACK DEVICE AND WORK MACHINE EQUIPPED WITH SAME
Provided is a jack device (20) rendering an operation of changing the posture of a jack cylinder (41) easy without using a device that actively changes the posture. The jack device (20) includes an arm (30), a jack body (40) including the jack cylinder (41), and a reaction-force application unit (60) supported by the arm (30). The reaction-force application unit (60) makes a reaction-force moment act on the jack body (40) in all postures from the upright posture to the storage posture in response to a force applied from the jack body (40). The reaction-force application unit (60) makes a reaction-force moment (Mr) greater than a self-weight moment (Ms) act on the jack body (40) in the storage posture and makes a reaction-force moment (Mr) smaller than the self-weight moment (Ms) act on the jack body (40) in the upright posture.
JACK DEVICE AND WORK MACHINE EQUIPPED WITH SAME
BUCHSENVORRICHTUNG UND ARBEITSMASCHINE DAMIT
DISPOSITIF DE VÉRIN ET MACHINE DE TRAVAIL ÉQUIPÉE DE CELUI-CI
ARITA RYUICHI (author)
2024-01-24
Patent
Electronic Resource
English
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