Patents by Inventor Toshiro Yamashita

Toshiro Yamashita 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: 20190300339
    Abstract: An output-torque estimation unit obtains a value of a current input to a motor, from a power converter, and calculates an estimated output torque value which is an estimated value of output torque of the motor, from the obtained value of the current. A load estimation unit estimates a load value of a hanging cargo based on the estimated output torque value which is calculated by the output-torque estimation unit, a speed reduction ratio of a speed reducer, an effective radius of a winch drum, and the winding number which is set by the number setting unit.
    Type: Application
    Filed: June 5, 2017
    Publication date: October 3, 2019
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki KAWAI, Takashi HIEKATA, Koji INOUE, Takashi TOKUYAMA, Hiroshi HASHIMOTO, Toshiaki SHIMODA, Shintaroh SASAI, Tetsuya OGAWA, Toshiro YAMASHITA
  • Patent number: 10399828
    Abstract: An electrically driven winch device includes a winch drum, a plurality of axial-gap electric motors, and a drive shaft. The winch drum rotates around a drum axis in order to wind or unwind a work rope. The plurality of electric motors are electric motors configured to drive the winch drum to rotate, and are each provided with a stator, and rotors which rotate around a rotation axis and are disposed at an axial distance from the stator. The drive shaft is disposed coaxially with the drum axis and serially connects the rotors of the plurality of electric motors on the rotation axis.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: September 3, 2019
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Koji Inoue, Hiroaki Kawai, Shintaroh Sasai, Tetsuya Ogawa, Toshiro Yamashita
  • Patent number: 10381890
    Abstract: An axial gap type dynamo-electric machine (1) comprises: a stator (2) provided with a magnetic core (21) and an exciting coil (22); a rotor (3) provided with a plurality of permanent magnets (4) circumferentially arranged around a rotation center axis (AX), the rotor (3) being also provided with a disk-shaped base material (31) for supporting the permanent magnets, the rotor (3) being disposed at an axial distance from the stator (2); and affixation members (5) for affixing the permanent magnets (4) to the base material (31). The permanent magnets (4) are provided with front surfaces facing the stator (2), rear surfaces facing the base material, and engagement-receiving sections (412, 422, 432) formed at peripheral edges of the permanent magnets (4). The affixation members (5) include: engagement sections (512) engaging the engagement-receiving sections; and affixation sections (511) forming mechanical affixation structures relative to the base material.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: August 13, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Inoue, Takashi Hiekata, Hiroaki Kawai, Shintaro Sasai, Tetsuya Ogawa, Toshiro Yamashita, Shingo Kasai, Shumpei Hayashi
  • Patent number: 10315896
    Abstract: An electric winch device includes a required braking force estimation section which estimates a required braking force required to stop a free-falling object at a position at an allowable stopping height; a braking force determination section which determines, out of an operational braking force, each of a first braking force to be borne by a braking device and a second braking force to be borne by a braking force which is generated in an electric motor due to consumption of regenerative power; and a control section which causes the braking device to apply the first braking force to a winch drum. The braking force determination section determines the first braking force to be a braking force equal to or greater than the required braking force when, at a time of stopping of the free-falling object, the operational braking force is equal to or greater than the required braking force.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: June 11, 2019
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki Kawai, Takashi Hiekata, Shintaro Sasai, Naoto Hori, Toshiro Yamashita, Koichi Shimomura
  • Patent number: 10196247
    Abstract: Provided is an electric winch device including: an electric motor; a winch drum; a brake; an operation lever; and a controller. The controller includes: a first torque derivation unit which derives a value of a first torque applied to the winch drum due to a load of an object; a second torque derivation unit which derives a value of a second torque generated in the winch drum by a drive torque of the electric motor; and a brake control unit which determines a timing for releasing a braking action on the winch drum after the operation lever has been operated, on the basis of a differential between the second torque value and the first torque value, and which causes the brake to release the braking action on the winch drum by transmitting, to the brake, a control signal instructing release of the braking action on the winch drum at the determined timing.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: February 5, 2019
    Assignees: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Hiroaki Kawai, Toshiro Yamashita, Shintaro Sasai, Naoto Hori, Koichi Shimomura
  • Patent number: 10189687
    Abstract: An electric winch device causes an operative part to perform an operation for hoisting work by winding up or letting out a rope connected to the operative part, the electric winch device including: a winch drum having an axis, provided on the mobile crane to be rotatable about the axis and wound with the rope therearound; a plurality of motors located on one side of the winch drum in an axial direction in which the axis of the winch drum extends, and arranged side by side in a direction perpendicular to the axial direction; a gear mechanism which combines torques output from the plurality of motors; and a transmitting part which transmits a resultant of torques combined by the gear mechanism to the winch drum to rotate the winch drum to thereby cause the winch drum to wind up or let out the rope.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: January 29, 2019
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Hiroaki Kawai, Koji Inoue, Shintaro Sasai, Tetsuya Ogawa, Toshiro Yamashita
  • Patent number: 10150655
    Abstract: An electric winch device including an electric motor that rotates a winch drum in a hoisting direction, and generates regenerative electric power when a rotation of the winch drum in a lowering direction is transmitted to the electric motor, a transmission device that transmits the rotation between the electric motor and the winch drum, a power calculating section that calculates power of the target object by freefall, and a control section that controls an operation of the transmission device. When the power calculated by the power calculating section exceeds reference electric power, the control section causes the transmission device to change the transmission rate of the rotation to a transmission rate at which the regenerative electric power generated by the electric motor is equal to or smaller than the reference electric power.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: December 11, 2018
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Hiekata, Hiroaki Kawai, Toshiro Yamashita, Shintaro Sasai, Naoto Hori, Koichi Shimomura
  • Publication number: 20180319635
    Abstract: An electrically driven winch device includes a winch drum, a plurality of axial-gap electric motors, and a drive shaft. The winch drum rotates around a drum axis in order to wind or unwind a work rope. The plurality of electric motors are electric motors configured to drive the winch drum to rotate, and are each provided with a stator, and rotors which rotate around a rotation axis and are disposed at an axial distance from the stator. The drive shaft is disposed coaxially with the drum axis and serially connects the rotors of the plurality of electric motors on the rotation axis.
    Type: Application
    Filed: October 7, 2016
    Publication date: November 8, 2018
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi HIEKATA, Koji INOUE, Hiroaki KAWAI, Shintaroh SASAI, Tetsuya OGAWA, Toshiro YAMASHITA
  • Patent number: 10087057
    Abstract: Provided is a braking apparatus for braking of an electric winch of a construction machine, ensuring safe braking with much regeneration. The apparatus includes a regenerative-power generation unit, a regenerative-power receiving unit, a braking device for mechanical braking separately from the regenerative-power generation unit, and a braking control unit including a necessary-braking-capacity calculation section, a regeneration-capacity calculation section calculating a regeneration capacity, and a command section. The command section, when the regeneration capacity is not less than a necessary braking capacity, performs braking with only a regenerative action while not operating the braking device and, when the regeneration capacity is less than the necessary braking capacity, calculates an auxiliary braking force equivalent to a difference between the necessary braking capacity and the regeneration capacity and brings the braking device into braking action with the auxiliary braking force.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: October 2, 2018
    Assignees: Kobe Steel, Ltd., KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki Kawai, Takashi Hiekata, Shintaro Sasai, Toshiro Yamashita
  • Publication number: 20180198335
    Abstract: An axial gap type dynamo-electric machine (1) comprises: a stator (2) provided with a magnetic core (21) and an exciting coil (22); a rotor (3) provided with a plurality of permanent magnets (4) circumferentially arranged around a rotation center axis (AX), the rotor (3) being also provided with a disk-shaped base material (31) for supporting the permanent magnets, the rotor (3) being disposed at an axial distance from the stator (2); and affixation members (5) for affixing the permanent magnets (4) to the base material (31). The permanent magnets (4) are provided with front surfaces facing the stator (2), rear surfaces facing the base material, and engagement-receiving sections (412, 422, 432) formed at peripheral edges of the permanent magnets (4). The affixation members (5) include: engagement sections (512) engaging the engagement-receiving sections; and affixation sections (511) forming mechanical affixation structures relative to the base material.
    Type: Application
    Filed: July 20, 2016
    Publication date: July 12, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Koji INOUE, Takashi HIEKATA, Hiroaki KAWAI, Shintaro SASAI, Tetsuya OGAWA, Toshiro YAMASHITA, Shingo KASAI, Shumpei HAYASHI
  • Publication number: 20170362067
    Abstract: An electric winch device causes an operative part to perform an operation for hoisting work by winding up or letting out a rope connected to the operative part, the electric winch device including: a winch drum having an axis, provided on the mobile crane to be rotatable about the axis and wound with the rope therearound; a plurality of motors located on one side of the winch drum in an axial direction in which the axis of the winch drum extends, and arranged side by side in a direction perpendicular to the axial direction; a gear mechanism which combines torques output from the plurality of motors; and a transmitting part which transmits a resultant of torques combined by the gear mechanism to the winch drum to rotate the winch drum to thereby cause the winch drum to wind up or let out the rope.
    Type: Application
    Filed: November 27, 2015
    Publication date: December 21, 2017
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi HIEKATA, Hiroaki KAWAI, Koji INOUE, Shintaro SASAI, Tetsuya OGAWA, Toshiro YAMASHITA
  • Patent number: 9796564
    Abstract: A crane includes an overload safety device and a identifying unit. The overload safety device includes a maximum-load calculating unit configured to calculate a maximum load that a winch drum is capable of winding up with driving torques output from the remaining electric motors other than a failed electric motor identified by the identifying unit, an updating unit configured to update a set hoisting ability value stored in a storing unit to a value equal to the maximum load, and a control unit configured to cause the remaining electric motors to operate when a value of a load derived by a load deriving unit is equal to or smaller than a latest set hoisting ability value stored in the storing unit and stop the operation of the plurality of electric motors when the value of the load derived by the load deriving unit exceeds the latest set hoisting ability value.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: October 24, 2017
    Assignees: Kobe Steel, Ltd., KOBELCO CRANES CO., LTD.
    Inventors: Hiroaki Kawai, Takashi Hiekata, Koji Inoue, Shintaro Sasai, Toshiro Yamashita, Koichi Shimomura, Tetsuya Ogawa
  • Publication number: 20170210606
    Abstract: An electric winch device includes a required braking force estimation section which estimates a required braking force required to stop a free-falling object at a position at an allowable stopping height; a braking force determination section which determines, out of an operational braking force, each of a first braking force to be borne by a braking device and a second braking force to be borne by a braking force which is generated in an electric motor due to consumption of regenerative power; and a control section which causes the braking device to apply the first braking force to a winch drum. The braking force determination section determines the first braking force to be a braking force equal to or greater than the required braking force when, at a time of stopping of the free-falling object, the operational braking force is equal to or greater than the required braking force.
    Type: Application
    Filed: July 10, 2015
    Publication date: July 27, 2017
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki KAWAI, Takashi HIEKATA, Shintaro SASAI, Naoto HORI, Toshiro YAMASHITA, Koichi SHIMOMURA
  • Publication number: 20170066634
    Abstract: Provided is a braking apparatus for braking of an electric winch of a construction machine, ensuring safe braking with much regeneration. The apparatus includes a regenerative-power generation unit, a regenerative-power receiving unit, a braking device for mechanical braking separately from the regenerative-power generation unit, and a braking control unit including a necessary-braking-capacity calculation section, a regeneration-capacity calculation section calculating a regeneration capacity, and a command section. The command section, when the regeneration capacity is not less than a necessary braking capacity, performs braking with only a regenerative action while not operating the braking device and, when the regeneration capacity is less than the necessary braking capacity, calculates an auxiliary braking force equivalent to a difference between the necessary braking capacity and the regeneration capacity and brings the braking device into braking action with the auxiliary braking force.
    Type: Application
    Filed: August 18, 2016
    Publication date: March 9, 2017
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Hiroaki KAWAI, Takashi Hiekata, Shintaro Sasai, Toshiro Yamashita
  • Publication number: 20170043983
    Abstract: An electric winch device including an electric motor that rotates a winch drum in a hoisting direction, and generates regenerative electric power when a rotation of the winch drum in a lowering direction is transmitted to the electric motor, a transmission device that transmits the rotation between the electric motor and the winch drum, a power calculating section that calculates power of the target object by freefall, and a control section that controls an operation of the transmission device. When the power calculated by the power calculating section exceeds reference electric power, the control section causes the transmission device to change the transmission rate of the rotation to a transmission rate at which the regenerative electric power generated by the electric motor is equal to or smaller than the reference electric power.
    Type: Application
    Filed: April 7, 2015
    Publication date: February 16, 2017
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi HIEKATA, Hiroaki KAWAI, Toshiro YAMASHITA, Shintaro SASAI, Naoto HORI, Koichi SHIMORURA
  • Publication number: 20160289054
    Abstract: Provided is an electric winch device including: an electric motor; a winch drum; a brake; an operation lever; and a controller. The controller includes: a first torque derivation unit which derives a value of a first torque applied to the winch drum due to a load of an object; a second torque derivation unit which derives a value of a second torque generated in the winch drum by a drive torque of the electric motor; and a brake control unit which determines a timing for releasing a braking action on the winch drum after the operation lever has been operated, on the basis of a differential between the second torque value and the first torque value, and which causes the brake to release the braking action on the winch drum by transmitting, to the brake, a control signal instructing release of the braking action on the winch drum at the determined timing.
    Type: Application
    Filed: November 6, 2014
    Publication date: October 6, 2016
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), KOBELCO CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi HIEKATA, Hiroaki KAWAI, Toshiro YAMASHITA, Shintaro SASAI, Naoto HORI, Koichi SHIMOMURA
  • Publication number: 20160257534
    Abstract: A crane includes an overload safety device and a identifying unit. The overload safety device includes a maximum-load calculating unit configured to calculate a maximum load that a winch drum is capable of winding up with driving torques output from the remaining electric motors other than a failed electric motor identified by the identifying unit, an updating unit configured to update a set hoisting ability value stored in a storing unit to a value equal to the maximum load, and a control unit configured to cause the remaining electric motors to operate when a value of a load derived by a load deriving unit is equal to or smaller than a latest set hoisting ability value stored in the storing unit and stop the operation of the plurality of electric motors when the value of the load derived by the load deriving unit exceeds the latest set hoisting ability value.
    Type: Application
    Filed: February 29, 2016
    Publication date: September 8, 2016
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), KOBELCO CRANES CO., LTD.
    Inventors: Hiroaki KAWAI, Takashi HIEKATA, Koji INOUE, Shintaro SASAI, Toshiro YAMASHITA, Koichi SHIMOMURA, Tetsuya OGAWA
  • Publication number: 20150299188
    Abstract: Provided is a compound having a superior FLAP inhibitory action and useful as a prophylactic or therapeutic agent for arteriosclerosis and the like, and a salt thereof. The present invention relates to a compound represented by the formula wherein each symbol is as defined in the present DESCRIPTION, or a salt thereof.
    Type: Application
    Filed: August 23, 2013
    Publication date: October 22, 2015
    Inventors: Masaki OGINO, Zenichi IKEDA, Jun FUJIMOTO, Yusuke OHBA, Naoki ISHII, Takuya FUJIMOTO, Tsuneo ODA, Naohiro TAYA, Toshiro YAMASHITA, Nobuyuki MATSUNAGA
  • Publication number: 20090264650
    Abstract: The present invention relates to a 11?-hydroxysteroid dehydrogenase 1 inhibitor comprising a compound represented by the formula (1): wherein each symbol is as defined in the description, or a salt thereof, or a prodrug thereof. The 11?-hydroxysteroid dehydrogenase 1 inhibitor of the present invention has a superior activity, and is useful as a pharmaceutical agent such as agents for the prophylaxis or treatment of diabetes, insulin resistance, obesity, abnormal lipid metabolism, hypertension and the like, and the like.
    Type: Application
    Filed: March 31, 2006
    Publication date: October 22, 2009
    Inventors: Nobuo Cho, Shizuo Kasai, Toshiro Yamashita
  • Publication number: 20060252797
    Abstract: A compound having a partial structure represented by the formula (A) (wherein ring Xa represents a nitrogen-containing ring and R represents optionally substituted amino) or a salt thereof. The compound or salt is highly effective in regulating neuromedin U receptors and is useful as a preventive/therapeutic agent for hypertension, etc.
    Type: Application
    Filed: November 5, 2003
    Publication date: November 9, 2006
    Inventors: Masahiro Kajino, Shuji Hinuma, Naoki Tarui, Toshiro Yamashita, Yutaka Nakayama