Komatsu Corporation

Atsushi Nagato

Masamichi Ueda

Hiroshi Yamamoto

Jun Sasaki

Hiroyoshi Yamaguchi

Ryo Sasaki

Taiki Sugawara

Motohide Sugihara

Shogo Atsumi

Tsuyoshi Imamura

Hiromi Tokura

Kiyokazu Sagawa

A calibration device for an imaging device includes an imaging data acquisition unit that acquires imaging data of a known external target installed at a known position outside a work range of work equipment, the imaging data being obtained by imaging of at least one imaging device provided in a work machine including the work equipment, an external target position acquisition unit that acquires a position of the known external target, and a calibration unit that calibrates the imaging device based on the position of the known external target, which is acquired by the external target position acquisition unit, and the imaging data of the known external target, which is acquired by the imaging data acquisition unit.

Calibration device for imaging device, monitoring device, work machine and calibration method

A working machine includes: an operation state detection unit configured to detect a physical amount output according to an operation of an operation lever; a time integration unit configured to calculate a time integration value by performing time integration of the physical amount; a determination unit configured to cause the time integration value and a predetermined operating angle of an excavating and loading mechanism associated with the operation of the operation lever to correspond to each other, and to determine that the operation of the operation lever has been performed at a time the time integration value becomes a predetermined integration value or more; and a counting unit configured to count at a time operations of the excavating and loading mechanism determined by the determination unit are performed in a predetermined order, number of times of excavating and loading work.

Working machine and method of measuring work amount of working machine

A work machine includes: an operation state detection unit detecting a physical amount output; a time integration unit calculating a time integration value; a determination unit determining that the operation of the operation lever is performed at a time the time integration value is not smaller than a predetermined integration value; a counting unit counting number of a series of the operations of the excavation-loading mechanism performed in a predetermined order as one series of the excavation-loading work; and a specific state detection unit detecting a specific operation state not related to the series of operations of the excavation-loading mechanism in a state in which an operation of the excavation-loading mechanism related to the series of excavation-loading work can be performed, and at a time the specific operation state is detected, the counting unit resets or corrects counting processing of the number of times of the series of excavation-loading work.

Work machine and work amount measurement method in work machine

A working machine includes: an operation state detection unit configured to detect a physical amount output according to an operation of an operation lever; a time integration unit configured to calculate a time integration value by performing time integration of the physical amount; a determination unit configured to cause the time integration value and a predetermined operating angle of an excavating and loading mechanism associated with the operation of the operation lever to correspond to each other, and to determine that the operation of the operation lever has been performed, at a time the time integration value becomes a predetermined integration value or more; and a counting unit configured to count number of times of a series of excavating and loading work.

A work machine includes: a work state detection unit detecting a physical amount; a time integration unit calculating a time integration value; a determination unit associating the time integration value with a predetermined operating angle of an excavation-loading mechanism and determining that an operation of an operation lever is performed at a time the time integration value is not smaller than a predetermined integration value; a counting unit performing accumulation adding with number of times of loading as once at a time each operation is an excavation-loading work performed in an order of: an excavation operation; a forward swing operation; a soil discharge operation; and a backward swing operation; a default setting unit setting a bucket capacity; a workload calculation unit calculating a workload by multiplying the number of times of loading by the bucket capacity; and an output unit outputting the workload.

Work machine and work management system

In a bush () which relatively-rotatably supports a journal shaft () around its central axis by housing the journal shaft () in a formed bearing hole (), the bushincludes an oil supply groove () formed spirally to supply lube oil to an inner surface of the bearing hole () which contacts to the journal shaft () when the journal shaft relatively rotates. A ratio of an area of the oil supply groove () to the inner surface area of the bearing hole () is equal to or less than 30%. A product of a distance in the central axis direction and a distance in the circumferential direction of the journal shaft () between the oil supply groove () in next to each other on the inner surface of the bearing hole () is within 50 to 300 mmrange.

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Fujisawa, Japan

Atsushi Nagato