Patents by Inventor Manabu Edamura

Manabu Edamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200048861
    Abstract: Provided is a hydraulic excavator (1) that performs work by operating an arm (9) after moving a bucket (10) to a work start position. An operation determination section (81c) determines, based on an operation performed on an operation device, whether a front work device (1A) is engaged in a work preparation operation for moving the bucket to the work start position. When the operation determination section determines that the front work device is engaged in the work preparation operation at the time of operation of the operation device, an actuator control section (81) controls a bucket cylinder (7) such that the angle of a work tool with respect to a target surface coincides with a preset target angle (?TGT).
    Type: Application
    Filed: November 8, 2017
    Publication date: February 13, 2020
    Inventors: Ryu NARIKAWA, Manabu EDAMURA, Hiroshi SAKAMOTO, Shiho IZUMI, Hidekazu MORIKI
  • Patent number: 10557251
    Abstract: The first engine speed or a work machine is higher than the minimum engine speed, and the second engine speed is higher than the first engine speed and lower than the maximum engine speed. The ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the minimum speed to the operation amount for instructing the first engine speed is larger than the ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the second engine speed to the operation amount for instructing the maximum speed.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: February 11, 2020
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shinya Imura, Shinji Nishikawa, Manabu Edamura, Kouji Ishikawa, Masatoshi Hoshino, Shinji Ishihara
  • Publication number: 20190345697
    Abstract: A hydraulic excavator includes: a multijoint type front implement that is configured by coupling a plurality of driven members including a bucket; inertial measurement units that detect posture information about the plurality of driven members; and a calibration value computing section that computes calibration parameters used in calibration of detection results of the inertial measurement units; and a work position computing section that computes a relative position of the bucket to the machine body on the basis of the detection results of the inertial measurement units and the computation result of the calibration value computing section, and the calibration value computing section computes the calibration parameters on the basis of the detection results of the inertial measurement units in a plurality of postures of the front implement in which a reference point set on any of the plurality of driven members in advance matches a reference position.
    Type: Application
    Filed: March 5, 2018
    Publication date: November 14, 2019
    Inventors: Shinji ISHIHARA, Hidekazu MORIKI, Manabu EDAMURA, Hiroshi SAKAMOTO, Yasutaka TSURUGA, Yuuichirou MORITA
  • Publication number: 20190284783
    Abstract: The construction machine includes: a body (9, 10); work equipment (15) having a plurality of swingable work elements (8, 11, 12); a plurality of hydraulic actuators (5, 6, 7) for driving the work equipment; a plurality of ground angle sensors (13a to 13d) for detecting the ground angles of the work elements; and an excavation support device (400) including an information processing device (100). The information processing device includes: a load information acquiring section (130) for acquiring load information including the load direction in the swing center of at least one of the work elements according to signals from the ground angle sensors; and a working point position calculating section (150) for calculating the position of the working point of the work equipment according to the signals from the ground angle sensors and the load information from the load information acquiring section.
    Type: Application
    Filed: October 25, 2017
    Publication date: September 19, 2019
    Inventors: Hidekazu MORIKI, Hiroshi SAKAMOTO, Manabu EDAMURA
  • Publication number: 20190249391
    Abstract: A work machine includes: a satellite communication antenna for detecting a position of an upper swing structure; angle sensors detecting postures of two work devices; position computing devices that calculate postures/positions of the two work devices on the basis of outputs from the satellite communication antenna and the angle sensors; a display device on which the position of at least one work device of the two work devices and a position of a target surface are displayed; a display selection switch that outputs a first input signal for displaying a work device selected by an operator from between the two work devices on the display device; and a display changeover section that displays the work device corresponding to the first input signal input from the display selection switch out of the two work devices and the position of the target work object of the work device on the display device.
    Type: Application
    Filed: November 20, 2017
    Publication date: August 15, 2019
    Inventors: Jun KIKUCHI, Seiji ISHIDA, Manabu EDAMURA
  • Publication number: 20190218749
    Abstract: A hydraulic excavator acquires operation content frequency data in a designated period based on output values output from a plurality of sensors sensing parameters that serve as indicators of operation contents performed via an operation device. A storage section stores a plurality of guide screens each corresponding to one of a plurality of work patterns of the hydraulic excavator. A work identifying section searches actual result data in the storage section for actual result data that matches or is similar to the operation content frequency data acquired by the data acquiring section in terms of operation contents and frequency thereof, and that identifies a current work pattern based on a work pattern allocated to actual result data related to a result of the search. A display device displays a guide screen corresponding to the work pattern identified by the work identifying section among the plurality of guide screens.
    Type: Application
    Filed: February 8, 2018
    Publication date: July 18, 2019
    Inventors: Kohei HIROMATSU, Manabu EDAMURA, Shiho IZUMI
  • Patent number: 10323388
    Abstract: A display system for a construction machine includes: a moving direction computing section for computing a predictive moving direction of a bucket; a work-tool display control section that, if the moving direction computing section predicts a movement of the bucket, changes the display position of a bucket image based on the predictive moving direction such that the area of a region located on the predictive moving direction side from the bucket image on the display screen of a monitor is displayed wider than when the bucket image is displayed at a reference position and that displays the bucket image at the reference position if a movement of the bucket cannot be predicted. A target-surface display control section displays on the display screen an image of a target surface when the bucket image is displayed at the display position determined by the work-tool display control section.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: June 18, 2019
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Yasuhiko Kanari, Manabu Edamura, Shiho Izumi, Takahiko Kurose
  • Publication number: 20190169818
    Abstract: A hydraulic excavator includes a controller (40) that executes region limiting control to forcibly raise a boom (8) in such a manner that a position of a tip end of a bucket (10) is kept on a target excavation surface and within a region above the target excavation surface if an operation device (45b, 46a) issues an action direction to an arm (9) or the bucket. The controller determines which is selected as a control mode over a raising speed of the boom at a time of executing region limiting control, a first mode or a second mode specified by a raising speed lower than a raising speed of the first mode if the tip end of the bucket is located below the target excavation surface, and controls the raising speed of the boom based on a result of determination.
    Type: Application
    Filed: April 5, 2017
    Publication date: June 6, 2019
    Inventors: Ryu NARIKAWA, Manabu EDAMURA, Kouji ISHIKAWA, Shiho IZUMI
  • Patent number: 10302028
    Abstract: Provided are a work machine, a power unit, and a diesel engine of a work machine that make it possible to reduce emitted noxious substances to levels below reference values stipulated by exhaust gas regulations in advanced countries and regions while also omitting or simplifying a post-treatment device. A hydraulic pump is driven by a diesel engine that limits maximum output torque in a low revolution speed region lower than a high revolution speed region including a rated revolution speed in such a manner that the maximum output torque has a characteristic of intermediate torque lower than torque of a maximum output horsepower point at the rated revolution speed, and a hydraulic actuator is driven by hydraulic fluid delivered from the hydraulic pump.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: May 28, 2019
    Assignees: Hitachi Construction Machinery Co., Ltd., Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Manabu Edamura, Yuusuke Kajita, Masatoshi Hoshino, Kouji Ishikawa, Kentarou Itoga, Naoki Ishikawa, Tsutomu Umehara
  • Patent number: 10301794
    Abstract: A construction machine acquires efficiently and accurately the target surface to be displayed or controlled. The construction machine includes: a design surface information storage unit storing three-dimensional target shape as multiple design surfaces; a work equipment velocity vector acquisition unit detecting or estimating the velocity of work equipment; a work equipment position acquisition unit detecting or estimating the position of the work equipment; a target surface acquisition unit acquiring a principal target surface to acquire an estimated target surface that is potentially the next principal target surface; an operation control unit correcting the work equipment velocity; and a display unit displaying the positional relations between the work equipment position and the principal target surface.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: May 28, 2019
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hidekazu Moriki, Hiroyuki Yamada, Manabu Edamura, Hiroshi Sakamoto
  • Publication number: 20180266079
    Abstract: An area limit control part as a control section outputs a requested boost pilot pressure for driving a control valve, based upon a pilot pressure in accordance with an operating amount of an operating lever and a posture signal of a posture sensor. A drive permission determination part determines whether or not a drive of a hydraulic actuator is permitted based upon the pilot pressure in accordance with the operating amount of the operating lever. A pilot pressure selecting part selects the requested boost pilot pressure from the area limit control part in such a manner as to drive the control valve with the requested boost pilot pressure to the hydraulic actuator the drive of which is permitted, and not to drive the control valve to the hydraulic actuator the drive of which is not permitted.
    Type: Application
    Filed: March 31, 2016
    Publication date: September 20, 2018
    Inventors: Yuuichirou MORITA, Manabu EDAMURA, Kouji ISHIKAWA
  • Patent number: 10060450
    Abstract: The energy efficiency is increased by reducing the throttle/relief loss in the delivery flow of the hydraulic pump caused by the bleed-off control, while also making it possible to control the delivery pressure of the hydraulic pump according to the operation amount of the control lever unit and improving the operational performance. A controller 6 includes a target pump pressure setting unit 32 which calculates a target pump delivery pressure which increases with the increase in an operation amount signal from an operation amount detector 20A/20B based on the operation amount signal and a pump flow rate upper limit setting unit 33 which calculates a pump flow rate upper limit which increases with the increase in the operation amount signal based on the operation amount signal.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: August 28, 2018
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tsutomu Udagawa, Akira Nakayama, Ryohei Yamashita, Shiho Izumi, Manabu Edamura, Kouji Ishikawa, Hidetoshi Satake
  • Publication number: 20180163374
    Abstract: The first engine speed or a work machine is higher than the minimum engine speed, and the second engine speed is higher than the first engine speed and lower than the maximum engine speed. The ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the minimum speed to the operation amount for instructing the first engine speed is larger than the ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the second engine speed to the operation amount for instructing the maximum speed.
    Type: Application
    Filed: March 10, 2016
    Publication date: June 14, 2018
    Inventors: Shinya IMURA, Shinji NISHIKAWA, Manabu EDAMURA, Kouji ISHIKAWA, Masatoshi HOSHINO, Shinji ISHIHARA
  • Publication number: 20180030694
    Abstract: A display system for a construction machine includes: a moving direction computing section for computing a predictive moving direction of a bucket; a work-tool display control section that, if the moving direction computing section predicts a movement of the bucket, changes the display position of a bucket image based on the predictive moving direction such that the area of a region located on the predictive moving direction side from the bucket image on the display screen of a monitor is displayed wider than when the bucket image is displayed at a reference position and that displays the bucket image at the reference position if a movement of the bucket cannot be predicted. A target-surface display control section displays on the display screen an image of a target surface when the bucket image is displayed at the display position determined by the work-tool display control section.
    Type: Application
    Filed: March 10, 2016
    Publication date: February 1, 2018
    Inventors: Yasuhiko KANARI, Manabu EDAMURA, Shiho IZUMI, Takahiko KUROSE
  • Publication number: 20170350327
    Abstract: Provided are a work machine, a power unit, and a diesel engine of a work machine that make it possible to reduce emitted noxious substances to levels below reference values stipulated by exhaust gas regulations in advanced countries and regions while also omitting or simplifying a post-treatment device. A hydraulic pump is driven by a diesel engine that limits maximum output torque in a low revolution speed region lower than a high revolution speed region including a rated revolution speed in such a manner that the maximum output torque has a characteristic of intermediate torque lower than torque of a maximum output horsepower point at the rated revolution speed, and a hydraulic actuator is driven by hydraulic fluid delivered from the hydraulic pump.
    Type: Application
    Filed: February 10, 2015
    Publication date: December 7, 2017
    Inventors: Manabu EDAMURA, Yuusuke KAJITA, Masatoshi HOSHINO, Kouji ISHIKAWA, Kentarou ITOGA, Naoki ISHIKAWA, Tsutomu UMEHARA
  • Publication number: 20170284057
    Abstract: A construction machine acquires efficiently and accurately the target surface to be displayed or controlled. The construction machine includes: a design surface information storage unit storing three-dimensional target shape as multiple design surfaces; a work equipment velocity vector acquisition unit detecting or estimating the velocity of work equipment; a work equipment position acquisition unit detecting or estimating the position of the work equipment; a target surface acquisition unit acquiring a principal target surface to acquire an estimated target surface that is potentially the next principal target surface; an operation control unit correcting the work equipment velocity; and a display unit displaying the positional relations between the work equipment position and the principal target surface.
    Type: Application
    Filed: March 7, 2017
    Publication date: October 5, 2017
    Inventors: Hidekazu MORIKI, Hiroyuki YAMADA, Manabu EDAMURA, Hiroshi SAKAMOTO
  • Patent number: 9581176
    Abstract: Both a hydraulic motor and an electric motor are provided for driving an upper swing structure. When the amount of electricity stored in a capacitor is appropriate, the upper swing structure is driven by both the hydraulic motor and the electric motor. When the amount of electricity stored in the capacitor exceeds an appropriate value, the mode is changed over to a mode in which the upper swing structure is driven only by the hydraulic motor, and an assist electric generation motor is assist-driven or engine-driven to thereby rapidly return the amount of electricity stored in the capacitor to an appropriate range. The capacity of the capacitor can be reduced, and the amount of electricity stored in the capacitor can be managed without losing the operability of swing motion.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: February 28, 2017
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Shiho Izumi, Manabu Edamura, Kouichi Shibata, Manabu Sugiura, Takatoshi Ooki
  • Patent number: 9574324
    Abstract: A work machine includes a swing hydraulic motor and a swing electric motor for driving an upper swing structure. A capacitor supplies electricity to the swing electric motor and an operating device outputs through one operation, an operating signal for concurrently operating the swing hydraulic motor and the swing electric motor. A main controller switches between a hydraulic-alone drive mode and an electric-alone drive mode, the hydraulic-alone drive mode being a mode to drive only the swing hydraulic motor selected from the swing hydraulic motor and the swing electric motor when the operating device is operated, the electric-alone drive mode being a mode to drive only the swing electric motor selected from the swing hydraulic motor and the swing electric motor when the operating is operated. Therefore, the actuator that malfunctions can easily be specified among the plurality of mounted actuators.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: February 21, 2017
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hidetoshi Satake, Takako Satake, Manabu Edamura, Takatoshi Ooki, Shinji Nishikawa, Kouichi Shibata
  • Patent number: 9421873
    Abstract: Construction machine capable of incorporating an engine and using an external power source. The construction machine includes an electrical storage device performing a charge with the external power source, uses the electrical storage device to provide assist when the power of the engine is insufficient, uses an electrical charge in the electrical storage device systematically in accordance with work time, and efficiently uses the electrical storage device by controlling its discharge amount in accordance with load status. The construction machine includes the engine, accessory loads connected to the engine, an assist electric motor driven by the engine, electrical power converters for converting an AC current, which is the output current of the assist electric motor, to a DC current, and the electrical storage device connected to the DC side of each electrical power converter. The electrical storage device becomes charged through a charging device from the external power source.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: August 23, 2016
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Seiji Ishida, Masataka Sasaki, Yusuke Kajita, Hidetoshi Satake, Takako Satake, Manabu Edamura, Kazuo Fujishima, Shiho Izumi
  • Patent number: 9290908
    Abstract: A hybrid construction machine is capable of performing satisfactory operations even when trouble occurs that disables the electric motor from outputting torque. The hybrid construction has both a hydraulic motor and an electric motor driving the swing structure and a controller for switching between a hydraulic/electric hybrid swing mode (using both the hydraulic motor and the electric motor) and a hydraulic-alone swing mode (using only the hydraulic motor). The switching is executed while achieving satisfactory operability and performance in each mode. Normally, an energy saving operation is performed in the hydraulic/electric hybrid swing mode. When the electric amount of an electricity storage device has gone out of a prescribed range or an abnormality has occurred in an electric system (e.g., failure of an inverter), the swing mode is switched to the hydraulic-alone swing mode so that driving with normal braking torque is possible by the hydraulic motor alone.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: March 22, 2016
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takenori Hiroki, Manabu Edamura, Toshihiko Ishida, Manabu Sugiura, Hidetoshi Satake, Kouji Ishikawa, Takatoshi Ooki, Shinji Nishikawa