Kobelco Construction Machinery Co., Ltd.

Akira Kinoshita

Keiji Yamamoto

Yusuke Kamimura

Masatoshi Kozui

Masakazu Ozaki

Yuji Kawakami

A control section determines a monitoring region, a region wherein an obstacle is to be monitored, the monitoring region not including the lower travelling body. The control section changes the monitoring region so as not to include the lower travelling body based on a turn angle detected by the turn angle detection section. The control section limits operation of at least one of travelling of the lower travelling body and turning of the upper slewing body when the obstacle detection section detects an obstacle being present in the monitoring region.

Construction machine

When an object detected by a distance measuring sensor is located in a monitoring region set in a blind spot of an operator, an obstacle determination section determines the detected object as an obstacle. Then, the obstacle determination section sets a monitoring region so that a region indicating a lower travelling body () is excluded according to a slewing angle detected by an angle sensor. Based on the slewing angle detected by the angle sensor, a stop control section determines a component, of at least one of the lower travelling body and an upper slewing body, which has a possibility that a construction machine collides with the obstacle when the component is operated, and stops operation of the determined component.

Obstacle detection device

Provided is an upper slewing body comprising: an upper frame, a cab including a bottom frame, a plurality of pillars including an outer pillar, and an entrance; an antivibration mount; a displacement restrainer restraining a cab displacement in a direction of rising away from the upper frame; and a reinforcing member attached to a lower end of the outer pillar for reinforcing a joint between the lower end and the bottom frame. The displacement restrainer includes a penetrating member vertically penetrating the reinforcing member and the bottom frame and secured to the upper frame. The displacement restrainer and the reinforcing member includes respective load transmitting surfaces for transmitting a load to each other above the joint between the bottom frame and the outer pillar when the cab is displaced in the rising direction by a specific amount or more.

Upper slewing body for use in construction machine

Provided is a cab for construction machine, having an excellent operator protection effect against a lateral load. Provided is a cab disposed on an upper frame of a construction machine, including a pair of rear pillars and a rear panel disposed therebetween. The rear panel includes an outer panel and an inner panel including a plurality of panel portions vertically arranged and a bridge portion partly bridging the panel portions vertically adjacent to each other at a position offset from a lateral center position of the rear panel. The bridge portion forms a low-strength portion having lower strength than that of the panel portions so as to make the low-strength portion include a bending point at which the rear panel is bent when a lateral load acts thereon through an outer rear pillar.

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Hiroshima, Japan

Akira Kinoshita