Hitachi Construction Machinery Co., Ltd.

Takashi Kusama

Hidefumi Ishimoto

Yoichi Kowatari

Yoshihiro Inanobe

Moritaka Oota

Kouji Fujita

Hiroyoshi Tanaka

Kenji Hiraku

Hiromasa Takahashi

Juri Shimizu

Teppei Saitoh

Mariko Mizuochi

Akinori Ishii

In an industrial machine, the work safety is further improved by eliminating blind spots from an image displayed on a monitor. A hydraulic excavatorwhich is the industrial machine is equipped with monitoring camerasF,B,L,R mounted in the respective places of a revolving upperstructurein order to capture images for monitoring. A monitordisplays camera imagesF,B,L,R obtained by the cameras as well as an icon imageC of an image illustration of the hydraulic excavator. The camerasF,L,R are mounted at the distal ends of support armsF,L,R to be located in positions jutting from a revolving upperstructure main unitof the revolving upperstructure, so that a hidden area under the underside of a catwalkprovided on the revolving upperstructurefalls within the field of view.

Monitoring image display device of industrial machine

To recognize an obstacle such as a working face which may be touched by a revolving upperstructure including a height position thereof at the time of a swing control. A plurality of first camerasfor forming bird's eye views which photograph obliquely lower parts of directions different from each other are arranged in a revolving upperstructure, a composite bird's eye viewis displayed on a display, second camerasR,L for photographing through images including corner parts from a rear end of the revolving upperstructureto side parts within a visual field range are arranged in lower part positions of a swing frameof the revolving upperstructureso as to rotate following swing of the revolving upperstructure, and corner part through imagesR,L are displayed on the displayso as to be superimposed on the composite bird's eye view

Surroundings display device for swing working machine

To provide a driving device capable of improving the operability of a plurality of single rod hydraulic cylinders. The present invention takes a construction provided with a closed circuit A in which first and third hydraulic pumpsand a boom cylinderare connected through selector valvesin a closed-circuit fashion, a plurality of open circuits E, F provided with second and fourth hydraulic pumpsand selector valvesthat switch the supply destinations of hydraulic oils flowing out from the second and fourth hydraulic pumps, and a connection passageconnected to sides of the selector valvesfrom which sides hydraulic oil flows out, and connected to the closed circuit A.

Driving device for work machine

Growing community of inventors

Tsuchiura, Japan

Takashi Kusama