Patents by Inventor Takenori Hiroki

Takenori Hiroki 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).

  • Patent number: 9605408
    Abstract: An electric motor that is fixed to a revolving frame, an electrical equipment that is supported by the revolving frame by using a vibration absorption mount, and a cable for establishing a connection between the electric motor and the electrical equipment are provided. A connector mounting member having an outer shape smaller than that of a box is provided in the box of the electrical equipment, and an equipment-side connector is provided in the connector mounting member. A cable-side connector of the cable is connected to the equipment-side connector, and a cable end portion of the cable is fixed to the box by a clamp member. As a result, the vibration that is transmitted to the cable can be matched with the vibration that is transmitted to the cable-side connector.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: March 28, 2017
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hidetoshi Satake, Takako Satake, Shinji Kato, Shuji Egawa, Takenori Hiroki, Toshihiko Watanabe, Yasunori Ota, Mitsugu Ojima
  • 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
  • Patent number: 9103093
    Abstract: To automatically prevent a reverse movement by inhibiting an excessive increase in an output torque of an electric motor. A means (31) calculates a target value for a rotation speed based on a command from a system (20), a means (32) calculates a deviation between a detection value from a rotation speed sensor (81) and the target value, a means (33) calculates a first target torque in a direction that the deviation will be eliminated, and a means (34) calculates, based on a command from the system (20), a second target torque in the same direction as the target value. A means (50) calculates a variation in a rotation angle of an electric motor (12) in a first range, and a means (60) calculates the same variation in a second range.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: August 11, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Tsutomu Udagawa, Mitsuo Sonoda, Manabu Edamura, Takenori Hiroki, Manabu Sugiura, Takako Satake
  • Patent number: 9057173
    Abstract: Provided is a hybrid construction machine capable of letting the operator immediately stop the swing structure by performing a stopping operation for ordinary construction machines even when the swing structure moves differently from the operator's will for some reason. The hybrid construction machine comprises: an inverter controller which outputs a PWM signal to an inverter and thereby controls the revolution speed of an electric motor; a first electric circuit including blocking means which blocks the PWM signal outputted from the inverter controller to the inverter in response to either an immobilization selection inputted through a gate lock lever switch or an OFF selection inputted through an ignition switch; and a second electric circuit including a swing brake solenoid valve which activates a swing brake in response to either the immobilization selection inputted through the gate lock lever switch or the OFF selection inputted through the ignition switch.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: June 16, 2015
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takenori Hiroki, Manabu Edamura, Manabu Sugiura, Kouji Ishikawa, Hidetoshi Satake
  • Patent number: 9004217
    Abstract: An electric work vehicle is provided in which the length of a high-tension cable connecting an electric motor included in a slewing motor with an inverter for controlling the electric motor can be set to be comparatively short. A region on a main frame is divided into three regions consisting of a center region, a first side region, and a second side region, via a first vertical rib and a second vertical rib. A slewing hydraulic motor and a slew assist electric motor, which constitute the slewing motor, are disposed in the center region, and an inverter for controlling the slew assist electric motor is disposed in a position near the second vertical rib in a second tool chamber provided in the second side region.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: April 14, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shinya Okumura, Mitsugu Ojima, Yasunori Ota, Toshihiko Ishida, Takenori Hiroki
  • Patent number: 8959918
    Abstract: A hybrid construction machine has an electric motor for driving the swing structure, and the electric motor is prevented from becoming incapable of generating torque due to a low energy state or an overcharged state of an electricity storage device. A swing-mode selector switch 77 which is manually operated switches between a hydraulic/electric combined swing mode for driving the swing structure by driving both the electric motor and a hydraulic motor and a hydraulic solo swing mode for driving the swing structure by driving only the hydraulic motor. For a normal operation, the swing mode is initially set in the hydraulic/electric combined swing mode. For a specific operation, the operator switches the swing-mode selector switch from a hydraulic/electric combined swing position to a hydraulic solo swing position.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: February 24, 2015
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shinji Nishikawa, Takenori Hiroki, Kouji Ishikawa, Manabu Edamura, Hidetoshi Satake, Takatoshi Ooki
  • Patent number: 8700275
    Abstract: Disclosed is a hybrid construction machine that includes a control device and an auxiliary control device. The control device switches between a hydraulic/electric complex swing mode in which both the electric motor and the hydraulic motor are driven to drive the swing structure by using the sum of the torque of the electric motor and the torque of the hydraulic motor; and a hydraulic-only swing mode in which only the hydraulic motor is driven to drive the swing structure by using only the torque of the hydraulic motor. The auxiliary control device includes a monitoring controller that is connected to the control device and to the electric motor to monitor the temperature or electrical leakage in the electric motor as a substitute controller for the power control unit or the electrical storage device when the power control unit or the electrical storage device is removed due to a fault.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: April 15, 2014
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Manabu Edamura, Kouji Ishikawa, Manabu Sugiura, Takenori Hiroki, Toshihiko Watanabe
  • Publication number: 20140021781
    Abstract: An electric motor that is fixed to a revolving frame, an electrical equipment that is supported by the revolving frame by using a vibration absorption mount, and a cable for establishing a connection between the electric motor and the electrical equipment are provided. A connector mounting member having an outer shape smaller than that of a box is provided in the box of the electrical equipment, and an equipment-side connector is provided in the connector mounting member. A cable-side connector of the cable is connected to the equipment-side connector, and a cable end portion of the cable is fixed to the box by a clamp member. As a result, the vibration that is transmitted to the cable can be matched with the vibration that is transmitted to the cable-side connector.
    Type: Application
    Filed: May 14, 2012
    Publication date: January 23, 2014
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Mitsugu Ojima, Toshihiko Watanabe, Takenori Hiroki, Shuji Egawa, Shinji Kato, Takako Satake, Yasunori Ota
  • Publication number: 20140002091
    Abstract: An electric operating system for a construction machine includes a first insulation resistance degradation detection device including a first voltage waveform generation device and a first detection section. The first detection section is connected to an electrical storage device and to the first voltage waveform generation device with respect to a relay and is adapted to detect degradation in the insulation resistance of the electrical storage device by measuring waveform changes input from the first voltage waveform generation device. A second insulation resistance degradation detection device includes a second voltage waveform generation device and a second detection section connected to a drive system and to the second voltage waveform generation device with respect to the relay, and is adapted to detect degradation in the insulation resistance of the drive system by measuring waveform changes input from the second voltage waveform generation device.
    Type: Application
    Filed: March 13, 2012
    Publication date: January 2, 2014
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Manabu Edamura, Takenori Hiroki, Masayuki Shiina, Kouichi Shibata
  • Publication number: 20130311052
    Abstract: Disclosed is a hybrid construction machine that includes a control device and an auxiliary control device. The control device switches between a hydraulic/electric complex swing mode in which both the electric motor and the hydraulic motor are driven to drive the swing structure by using the sum of the torque of the electric motor and the torque of the hydraulic motor; and a hydraulic-only swing mode in which only the hydraulic motor is driven to drive the swing structure by using only the torque of the hydraulic motor. The auxiliary control device includes a monitoring controller that is connected to the control device and to the electric motor to monitor the temperature or electrical leakage in the electric motor as a substitute controller for the power control unit or the electrical storage device when the power control unit or the electrical storage device is removed due to a fault.
    Type: Application
    Filed: March 13, 2012
    Publication date: November 21, 2013
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Manabu Sugiura, Toshihiko Watanabe, Takenori Hiroki, Manabu Edamura, Takako Satake, Kouji Ishikawa
  • Publication number: 20130243557
    Abstract: Provided is a hybrid construction machine capable of letting the operator immediately stop the swing structure by performing a stopping operation for ordinary construction machines even when the swing structure moves differently from the operator's will for some reason. The hybrid construction machine comprises: an inverter controller which outputs a PWM signal to an inverter and thereby controls the revolution speed of an electric motor; a first electric circuit including blocking means which blocks the PWM signal outputted from the inverter controller to the inverter in response to either an immobilization selection inputted through a gate lock lever switch or an OFF selection inputted through an ignition switch; and a second electric circuit including a swing brake solenoid valve which activates a swing brake in response to either the immobilization selection inputted through the gate lock lever switch or the OFF selection inputted through the ignition switch.
    Type: Application
    Filed: October 3, 2011
    Publication date: September 19, 2013
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takenori Hiroki, Manabu Edamura, Manabu Sugiura, Kouji Ishikawa, Hidetoshi Satake
  • Publication number: 20130174556
    Abstract: A hybrid construction machine has an electric motor for driving the swing structure, and the electric motor is prevented from becoming incapable of generating torque due to a low energy state or an overcharged state of an electricity storage device. A swing-mode selector switch 77 which is manually operated switches between a hydraulic/electric combined swing mode for driving the swing structure by driving both the electric motor and a hydraulic motor and a hydraulic solo swing mode for driving the swing structure by driving only the hydraulic motor. For a normal operation, the swing mode is initially set in the hydraulic/electric combined swing mode. For a specific operation, the operator switches the swing-mode selector switch from a hydraulic/electric combined swing position to a hydraulic solo swing position.
    Type: Application
    Filed: July 20, 2011
    Publication date: July 11, 2013
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Shinji Nishikawa, Takenori Hiroki, Kouji Ishikawa, Manabu Edamura, Hidetoshi Satake, Takatoshi Ooki
  • Publication number: 20130108404
    Abstract: An electric work vehicle is provided in which the length of a high-tension cable connecting an electric motor included in a slewing motor with an inverter for controlling the electric motor can be set to be comparatively short. A region on a main frame is divided into three regions consisting of a center region, a first side region, and a second side region, via a first vertical rib and a second vertical rib. A slewing hydraulic motor and a slew assist electric motor, which constitute the slewing motor, are disposed in the center region, and an inverter for controlling the slew assist electric motor is disposed in a position near the second vertical rib in a second tool chamber provided in the second side region.
    Type: Application
    Filed: July 21, 2011
    Publication date: May 2, 2013
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Shinya Okumura, Mitsugu Ojima, Yasunori Ota, Toshihiko Ishida, Takenori Hiroki
  • Publication number: 20130058750
    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: Application
    Filed: May 16, 2011
    Publication date: March 7, 2013
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takenori Hiroki, Manabu Edamura, Toshihiko Ishida, Manabu Sugiura, Hidetoshi Satake, Kouji Ishikawa, Takatoshi Ooki, Shinji Nishikawa
  • Patent number: 7388199
    Abstract: A probe is made by attaching a carbon nanotube 12 to a mounting base end 13, which eliminates the effects of a carbon contamination film, to increase the bonding strength, increase the conductivity of the probe, and strengthen the bonding performance thereof by coating the entire circumference of the nanotube and the base with a coating film, rather than coating just one side. The work of mounting the carbon nanotube and mounting base end are performed under observation by a microscope. Further, the carbon contamination film 14 formed by an electron microscope is stripped off at a stage before bonding by the coating film.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: June 17, 2008
    Assignee: Hitachi Kenki Fine Tech Co., Ltd.
    Inventors: Takafumi Morimoto, Tooru Shinaki, Yoshiyuki Nag'No, Yukio Kenbou, Yuuichi Kunitomo, Takenori Hiroki, Tooru Kurenuma, Hiroaki Yanagimoto, Hiroshi Kuroda, Shigeru Miwa, Ken Murayama, Mitsuo Hayashibara, Kishio Hidaka, Tadashi Fujieda
  • Patent number: 7350404
    Abstract: The probe tip movement control method of the scanning probe microscope is used for a scanning probe microscope provided with a cantilever 21 having a probe tip 20 facing a sample 12. The atomic force occurring between the probe tip and sample is measured when the probe tip scans the surface of the sample. X-, Y-, and Z-fine movement mechanisms 23, 29, and 30 are used to relatively change the positions of the probe tip and sample. It is possible to maintain a high measurement accuracy and enable scan movement of a probe tip on a sample surface by simple control when measuring a part having a gradient in measurement of an uneven shape on a sample surface.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: April 1, 2008
    Assignee: Hitachi Kenki Fine Tech Co., Ltd.
    Inventors: Tooru Kurenuma, Hiroaki Yanagimoto, Hiroshi Kuroda, Yasushi Minomoto, Shigeru Miwa, Ken Murayama, Yukio Kenbou, Yuuichi Kunitomo, Takenori Hiroki, Yoshiyuki Nagano, Takafumi Morimoto
  • Patent number: 7333191
    Abstract: A scanning probe microscope has a cantilever with a probe facing a sample and a measurement section for measuring a physical quantity occurring between the probe and the sample when the probe scans a surface of the sample, holding the physical quantity constant to measure the surface of the sample. The above microscope further has a probe tilt mechanism, an optical microscope etc. for detecting a position of the probe when the probe is tilted, and a control section for setting the probe in a first tilt posture and second tilt posture, measuring a surface of the sample by the measurement section at each tilt posture, detecting the position of the probe at least at the second tilt posture by the optical microscope etc., and making a measurement location at the second tilt posture match with a measurement location at the first tilt posture for measurement.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: February 19, 2008
    Assignee: Hitachi Kenki Finetech Co., Ltd.
    Inventors: Ken Murayama, Yukio Kenbou, Yuuichi Kunitomo, Takenori Hiroki, Yoshiyuki Nagano, Takafumi Morimoto, Tooru Kurenuma, Hiroaki Yanagimoto, Hiroshi Kuroda, Shigeru Miwa
  • Publication number: 20070180889
    Abstract: A probe replacement method for a scanning probe microscope for measuring the surface of a sample, having a cantilever (21) having a probe (20), and a measurement unit for measuring a physical quantity between the probe and sample. The scanning probe microscope is provided with a cantilever mount (22), a cantilever cassette (30), an XY stage (14) and Z stage (15) for moving the cantilever cassette, and an optical microscope (18). In a first step, a cantilever is selected from the cantilever cassette and is mounted on the cantilever mount. In a second step, an optical microscope is moved and the mounted cantilever is set in a prescribed position in the field of view after the cantilever is mounted in the scanning probe microscope. In the second step, a step is provided for moving the optical microscope side or the cantilever side and performing positional adjustment.
    Type: Application
    Filed: March 22, 2004
    Publication date: August 9, 2007
    Inventors: Ken Murayama, Yokio Kenbou, Yuuichi Kunitomo, Takenori Hiroki, Yoshiyuki Nagano, Takafumi Morimoto, Tooru Kurenuma, Hiroaki Yanagimoto, Hiroshi Kuroda, Shigeru Miwa, Takashi Furutani
  • Publication number: 20060284084
    Abstract: A method of producing a probe by attaching a carbon nanotube etc. to a mounting base end and bonding it there using a carbon film etc., which method of producing a probe eliminates the effects of a carbon contamination film to increase the bonding strength, increases the conductivity of the probe, and strengthens the bonding performance by coating the entire circumference rather than coating one side, the probe, and a scanning probe microscope are provided. The method of producing a probe is a method of producing a probe comprised of a carbon nanotube 12, a mounting base ends 13 holding this carbon nanotube, and a coating film 17 bonding the carbon nanotube to a mounting base, comprising performing the mounting work of the carbon nanotube and mounting base end under observation by a microscope and stripping off the carbon contamination film 14 formed by an electron microscope at a stage before bonding by the coating film.
    Type: Application
    Filed: September 3, 2004
    Publication date: December 21, 2006
    Inventors: Takafumi Morimoto, Tooru Seinaki, Yoshiyuki Nag-No, Yukio Kenbou, Yuuichi Xunitomo, Takenori Hiroki, Tooru Kurenuma, Hiroaki Yanagimoto, Hiroshi Kuroda, Shigeru Miwa, Ken Murayama, Mitsuo Hayashirara, Kishio Hidaka, Tadashi Fujieda
  • Publication number: 20060284083
    Abstract: The probe tip movement control method of the scanning probe microscope is used for a scanning probe microscope provided with a cantilever 21 having a probe tip 20 facing a sample 12. The atomic force occurring between the probe tip and sample is measured when the probe tip scans the surface of the sample. X-, Y-, and Z-fine movement mechanisms 23, 29, and 30 are used to relatively change the positions of the probe tip and sample. It is possible to maintain a high measurement accuracy and enable scan movement of a probe tip on a sample surface by simple control when measuring a part having a gradient in measurement of an uneven shape on a sample surface.
    Type: Application
    Filed: August 27, 2004
    Publication date: December 21, 2006
    Inventors: Tooru Kurenuma, Hiroaki Yanagimoto, Hiroshi Kuroda, Yasushi Minomoto, Shigeru Miwa, Ken Murayama, Yukio Kenbou, Yuuichi Yuuichi, Takenori Hiroki, Yoshiyuki Nagano, Takafumi Morimoto