Patents Assigned to Komatsu Ltd.
  • OVERTURNING-RISK PRESENTATION DEVICE AND OVERTURNING-RISK PRESENTATION METHOD
    Publication number: 20220389682
    Abstract: In an overturning-risk presentation device according to the present invention, a reception unit is configured to receive posture data of a work machine of a time when the work machine detects an overturning risk. A calculation unit configured to calculate the number of times of detection of the overturning risk for each inclination direction of the work machine based on the posture data. A generation unit configured to generate an inclination frequency image representing the number of times of detection of the overturning risk for each inclination direction of the work machine. An output unit configured to output the generated inclination frequency image.
    Type: Application
    Filed: November 18, 2020
    Publication date: December 8, 2022
    Applicant: Komatsu Ltd.
    Inventors: Hidehiko Kobayashi, Masaaki Uetake, Takahiro Hashimoto
  • WORK MACHINE, WEIGHING METHOD, AND SYSTEM INCLUDING WORK MACHINE
    Publication number: 20220389688
    Abstract: A load in a bucket is weighed accurately in a short time period. A work machine includes a bucket and a controller. The controller determines a period in which a parameter related to a load weight in the bucket fluctuates with respect to time. The controller averages load weights at a plurality of time points within the period to calculate an average load weight.
    Type: Application
    Filed: December 2, 2020
    Publication date: December 8, 2022
    Applicant: KOMATSU LTD.
    Inventor: Shota YAMAWAKI
  • Work machine
    Patent number: 11519157
    Abstract: There is provided a work machine that can avoid an unintended movement of a blade. A crawler dozer includes a controller. The controller controls EPC valves. A left tilt cylinder and a right tilt cylinder are asymmetrically attached to a blade. The EPC valves control direction and flow rate of supply of hydraulic oil to the right tilt cylinder. The EPC valves control direction and flow rate of supply of the hydraulic oil to the left tilt cylinder. The controller controls the EPC valves and the EPC valves to extend or contract the left tilt cylinder and the right tilt cylinder at different rates.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: December 6, 2022
    Assignee: KOMATSU LTD.
    Inventors: Takuya Uemura, Yusuke Yamazaki
  • Method for estimating operation of work vehicle, system, method for producing trained classification model, training data, and method for producing training data
    Patent number: 11521008
    Abstract: A method is performed by a computer. The method includes obtaining motion data indicating a motion change of a work vehicle, and determining an operation classification of the work vehicle from the motion data by performing image classification using a trained classification model. The motion data is generated from a plurality of images indicating the work vehicle in operation in time series.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: December 6, 2022
    Assignee: KOMATSU LTD.
    Inventor: Masanori Aizawa
  • WORK MACHINE CONTROL SYSTEM, WORK MACHINE, WORK MACHINE CONTROL METHOD, AND WORK MACHINE CONTROL DEVICE
    Publication number: 20220381005
    Abstract: A work machine control system includes: a pump; a cylinder operating a working equipment element in a movable range based on hydraulic oil supplied from the pump; a first path connected to the pump; a second path branching from the first path; a control valve adjusting the flow rate of the oil supplied to the cylinder via the first path; a bleed valve adjusting the flow rate of the oil discharged to a tank via the second path; a sensor detecting a posture of the element in the range; and a control device outputting a first command for adjusting the flow rate of the oil supplied to the cylinder and a second command for adjusting the flow rate of the oil discharged to the tank when element is determined to be present in an end section of the range based on detection data of the sensor.
    Type: Application
    Filed: December 9, 2020
    Publication date: December 1, 2022
    Applicant: Komatsu Ltd.
    Inventors: Yusuke Fujii, Yuuji Shibata
  • WORK MACHINE, WEIGHING METHOD, AND SYSTEM INCLUDING WORK MACHINE
    Publication number: 20220381008
    Abstract: A load in a bucket is accurately weighed. A work machine includes a work implement, an input receiving unit, and a controller. The work implement includes a bucket. The input receiving unit receives a weighing start input for starting to weigh the load in the bucket. When the input receiving unit receives the weighing start input, the controller determines whether an automatic weighing start condition is satisfied or not. The automatic weighing start condition includes a condition that the work implement is not performing an excavation work. When the automatic weighing start condition is satisfied, the controller controls an operation of the work implement to weigh the load in the bucket.
    Type: Application
    Filed: December 2, 2020
    Publication date: December 1, 2022
    Applicant: KOMATSU LTD.
    Inventor: Shota YAMAWAKI
  • Control system for work vehicle, method, and work vehicle
    Patent number: 11512452
    Abstract: A control system for a work vehicle includes a controller. The controller acquires actual topography data indicating an actual topography to be worked. The controller determines a target design topography indicating a target trajectory of a work implement of the work vehicle based on the actual topography. The controller acquires an uneven surface parameter indicating the degree of surface unevenness of the actual topography. The controller changes the target design topography according to the uneven surface parameter.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: November 29, 2022
    Assignee: KOMATSU LTD.
    Inventor: Kazuhiro Hashimoto
  • ROAD SURFACE CONDITION MONITORING SYSTEM, WORK VEHICLE, ROAD SURFACE CONDITION MONITORING METHOD, AND PROGRAM
    Publication number: 20220372733
    Abstract: A road surface condition monitoring system according to the present invention includes: a road surface condition acquisition unit configured to acquire monitoring object information on at least a shape or size of a monitoring object existing in an area including a road surface in a direction in which a work vehicle travels by driving of a traveling mechanism, which mounts a tire, of the work vehicle; a storage unit configured to store reference information for determining whether the tire is to be damaged; a damage determination unit configured to determine, based on the monitoring object information and the reference information, whether the tire is to be damaged when the tire comes into contact with the monitoring object by the driving of the traveling mechanism; and an output unit configured to output a result determined by the damage determination unit.
    Type: Application
    Filed: November 5, 2020
    Publication date: November 24, 2022
    Applicant: Komatsu Ltd.
    Inventors: Yuya Murakami, Masanori Ono
  • TILT STRUCTURE FOR CONSOLE AND CONSOLE
    Publication number: 20220371649
    Abstract: A tilt structure allows the tilt of a console to be changed through simple motion and has a simple configuration. The tilt structure includes: a second frame attached to an upper portion of a first frame and is swingable upward and downward; and a control member attached to the second frame and is tiltable backward and forward through a tilting shaft. The control member includes a guide part with a groove housing a first frame pin. A locked and unlocked state switch to each other by causing the control member to tilt. The locked state includes a pin engaged with any of the engagement parts. The unlocked state includes the pin disengaged. The tilt of the second frame relative to the first frame is changed by engaging the pin with an arbitrary engagement part of any of the engagement parts and changing a distance between the tilting shaft and pin.
    Type: Application
    Filed: December 2, 2020
    Publication date: November 24, 2022
    Applicants: STARTING INDUSTRIAL CO., LTD., KOMATSU LTD.
    Inventors: Hiroki KATO, Ami ISHIMIZU, Norihiro IWAHASHI, Takuma SHODA, Keita TANAKA
  • OVERTURNING-RISK PRESENTATION DEVICE AND OVERTURNING-RISK PRESENTATION METHOD
    Publication number: 20220375157
    Abstract: In an overturning-risk presentation device according to the present invention, a reception unit is configured to receive posture data of a work machine of a time when the work machine detects an overturning risk. A generation unit is configured to generate an inclination posture image representing a posture of the work machine based on the posture data. An output unit is configured to output the generated inclination posture image.
    Type: Application
    Filed: November 17, 2020
    Publication date: November 24, 2022
    Applicant: Komatsu Ltd.
    Inventors: Hidehiko Kobayashi, Masaaki Uetake, Takahiro Hashimoto
  • Work system, work machine, and control method
    Patent number: 11507078
    Abstract: A work system includes an operation device that transmits an operation signal, a work machine that operates on the basis of the operation signal, and a transport vehicle that outputs a traveling control signal in a case where a fault in communication between the operation device and the work machine occurs.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: November 22, 2022
    Assignee: Komatsu Ltd.
    Inventors: Masanori Minagawa, Yasuhiro Ohyama, Qi Ding
  • Calibration device for imaging device, monitoring device, work machine and calibration method
    Patent number: 11508091
    Abstract: 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.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: November 22, 2022
    Assignee: Komatsu Ltd.
    Inventors: Shogo Atsumi, Taiki Sugawara, Hiroyoshi Yamaguchi, Atsushi Nagato
  • WORK MACHINE
    Publication number: 20220364333
    Abstract: A work machine includes a manipulation device, a surrounding area monitoring device, and a controller. The manipulation device outputs a manipulation signal to operate the work machine. The surrounding area monitoring device serves as a device for detecting whether an object to be recognized is present or not inside a set region that is set in a surrounding area of the work machine. The controller controls the work machine. The controller is capable of switching a setting of an object sensing function between execution and non-execution, the object sensing function being to restrict movement of the work machine when it is detected that the object is present inside the set region. When the manipulation signal is detected in a state where the object sensing function is set at non-execution, the controller switches the setting of the object sensing function to execution.
    Type: Application
    Filed: July 8, 2020
    Publication date: November 17, 2022
    Applicant: KOMATSU LTD.
    Inventors: Harunobu USHIJIMA, Satoru IDE, Hiroshi YAMASHITA
  • Machine device state monitoring system and machine device state monitoring method
    Patent number: 11501421
    Abstract: A machine device state monitoring system includes an image data acquisition unit that acquires image data of an inside of a housing chamber in which a mechanical part is housed, an image analysis unit that outputs foreign substance data relating to a foreign substance in oil in the housing chamber based on the image data, a storage unit that stores characteristic data indicating a characteristic of the foreign substance, and an estimation unit that estimates a state of a machine device having the mechanical part based on the foreign substance data and the characteristic data to output estimation data.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: November 15, 2022
    Assignee: Komatsu Ltd.
    Inventors: Hiroyuki Chikugo, Shuuji Hori, Haruna Higashi
  • OPERATION AREA PRESENTATION DEVICE AND OPERATION AREA PRESENTATION METHOD
    Publication number: 20220356680
    Abstract: In an operation area presentation device according to the present invention, a reception unit is configured to receive history data of a position of an operation site in which a work machine is present. A calculation unit is configured to calculate a staying time of the work machine for each of a plurality of areas of the operation site. A generation unit is configured to generate an operation area map obtained by mapping the staying time for each of the plurality of areas to a map of the operation site. An output unit is configured to output the generated operation area map.
    Type: Application
    Filed: November 18, 2020
    Publication date: November 10, 2022
    Applicant: Komatsu Ltd.
    Inventors: Hidehiko Kobayashi, Masaaki Uetake, Takahiro Hashimoto
  • Work vehicle
    Patent number: 11492781
    Abstract: A work vehicle includes a steering wheel, a steering cylinder, a steering valve, a feed line, a return line, an electromagnetic valve, and a controller. The steering valve is configured to supply hydraulic fluid to the steering cylinder in response to steering of the steering wheel. The feed line is configured to feed the hydraulic fluid from the steering valve to the steering cylinder. The return line is configured to return the hydraulic fluid from the steering cylinder to the steering valve. The electromagnetic valve is disposed between the feed line and the return line. The controller opens the electromagnetic valve in response to an oil pressure in the feed line.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: November 8, 2022
    Assignee: KOMATSU LTD.
    Inventors: Keiichi Hayashi, Masanori Ikari, Hirotaka Kamekura
  • Dump truck
    Patent number: 11485293
    Abstract: A dump truck, which travels in travel directions and dumps loads in a dumping direction collinear to one of the travel directions, includes: a chassis provided with tires at front and rear parts in the travel direction; an obstacle detector provided at a dump-side end of the chassis, the obstacle detector detecting an obstacle in the dumping direction of the chassis; and a shifter that is capable of moving the obstacle detector to a first position at which the obstacle detector protrudes beyond dump-side ends of the tires and to a second position at which the obstacle detector is located inner than the dump-side ends of the tires.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: November 1, 2022
    Assignee: Komatsu Ltd.
    Inventors: Yousuke Yabe, Daichi Yui
  • MEASUREMENT SYSTEM AND MEASUREMENT METHOD
    Publication number: 20220341322
    Abstract: A measurement system 50 measures a grade of an excavated material generated from an underground tunnel including a plurality of mining points. The underground tunnel is constructed based on a mining plan of a mine planned based on primary grade data and primary position data corresponding to the primary grade data measured in a preliminary geological survey. The measurement system includes a measuring unit (grade measuring unit) 61 that measures the grade of the excavated material generated from the underground tunnel, a secondary grade data acquisition unit (grade data acquisition unit) 72 that acquires secondary grade data indicating the grade of the excavated material from the measuring unit 61, and a secondary position data acquisition unit (position data acquisition unit) 73 that acquires secondary position data corresponding to the secondary grade data.
    Type: Application
    Filed: August 26, 2020
    Publication date: October 27, 2022
    Applicant: Komatsu Ltd.
    Inventors: Yuichi Kodama, Shinichi Terada, Eiichi Morioka, Takashi Nagayoshi
  • Work machine and cab
    Patent number: 11479944
    Abstract: The cab includes a front pillar on the first side face and a front pillar disposed on the second side face and located behind the front pillar. The cab includes a front transparent member located between the first side face and the second side face and a lateral transparent member provided the second side face and connected to the front pillar. The cab includes a roller disposed on the front transparent member and a bracket disposed on the lateral transparent member and provided with a rail member to guide the roller.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: October 25, 2022
    Assignee: KOMATSU LTD.
    Inventors: Makoto Sasaki, Hiroaki Tanaka, Takeshi Ikeda
  • Work vehicle
    Patent number: 11479949
    Abstract: A work vehicle includes an axle frame extending in a left-right direction, a cylinder coupled to the axle frame, and a first supply conduit connected to the cylinder and configured to supply hydraulic fluid to the cylinder. The first supply conduit is fixed to the axle frame.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: October 25, 2022
    Assignee: KOMATSU LTD.
    Inventors: Yasutaka Numa, Ikki Hirose