Patents by Inventor Shuhei Yamanaka

Shuhei Yamanaka 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: 10972036
    Abstract: A control device for controlling a linear actuator having a linear motor and a brake device includes a magnetic pole position estimation means to estimate which of a plurality of sections obtained by dividing a magnetic pole position of 0° to 360°, the mover is located in on the basis of a direction of movement of the mover by pulse energization, a magnetic pole position setting means to perform direct current excitation at an estimated magnetic pole position estimated by the magnetic pole position estimation means and set the estimated magnetic pole position as a magnetic pole position of the mover, and a brake control means to turn on a brake device before pulse energization by the magnetic pole position estimation means is performed and turn off the brake device after the magnetic pole position estimation means estimates the section in which the mover is located.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: April 6, 2021
    Assignee: THK CO., LTD.
    Inventors: Junichi Sakai, Shuhei Yamanaka, Hideo Saito, Yuki Nomura, Hideya Nakayama
  • Patent number: 10801919
    Abstract: A fault detection sensor-equipped actuator is provided which can easily detect a fault in at least one of a linear guide unit and a ball screw unit, using a shared sensor. In an actuator (10) including a linear guide unit (4) that guides linear movement of a movable body (1) and a ball screw unit (7) that drives the movable body (1) in an axial direction of a screw shaft (6), a sensor (18) configured to detect a fault in the actuator (10) is placed in a housing (11) where a coupling (12) that couples the screw shaft (6) and a motor (14) for rotating the screw shaft (6) is housed.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: October 13, 2020
    Assignee: THK CO., LTD.
    Inventors: Yoshiyuki Honjo, Shuhei Yamanaka
  • Patent number: 10712236
    Abstract: Provided is a state diagnosis system, which is applied to a rolling guide device in which a moving member including an endless circulation path for rolling elements is freely movable along a track member, and which is configured to appropriately recognize a state of a rolling surface of the track member. The state diagnosis system includes: a sensor configured to detect a physical quantity exhibited when the moving member is moving along the track member; a signal processing unit configured to process an output signal from the sensor to output analysis data; and a determination processing unit configured to compare the analysis data with threshold value data to determine whether or not the rolling guide device has an abnormality.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: July 14, 2020
    Assignee: THK CO., LTD.
    Inventors: Yoshiyuki Honjo, Shuhei Yamanaka
  • Publication number: 20200091851
    Abstract: A control device for controlling a linear actuator having a linear motor and a brake device includes a magnetic pole position estimation means to estimate which of a plurality of sections obtained by dividing a magnetic pole position of 0° to 360°, the mover is located in on the basis of a direction of movement of the mover by pulse energization, a magnetic pole position setting means to perform direct current excitation at an estimated magnetic pole position estimated by the magnetic pole position estimation means and set the estimated magnetic pole position as a magnetic pole position of the mover, and a brake control means to turn on a brake device before pulse energization by the magnetic pole position estimation means is performed and turn off the brake device after the magnetic pole position estimation means estimates the section in which the mover is located.
    Type: Application
    Filed: July 27, 2016
    Publication date: March 19, 2020
    Applicant: THK CO., LTD.
    Inventors: Junichi Sakai, Shuhei Yamanaka, Hideo Saito, Yuki Nomura, Hideya Nakayama
  • Publication number: 20200056961
    Abstract: Provided is a state diagnosis system, which is applied to a rolling guide device in which a moving member including an endless circulation path for rolling elements is freely movable along a track member, and which is configured to appropriately recognize a state of a rolling surface of the track member. The state diagnosis system includes: a sensor configured to detect a physical quantity exhibited when the moving member is moving along the track member; a signal processing unit configured to process an output signal from the sensor to output analysis data; and a determination processing unit configured to compare the analysis data with threshold value data to determine whether or not the rolling guide device has an abnormality.
    Type: Application
    Filed: October 19, 2017
    Publication date: February 20, 2020
    Applicant: THK CO., LTD.
    Inventors: Yoshiyuki Honjo, Shuhei Yamanaka
  • Publication number: 20190361758
    Abstract: The state diagnosis system including: a sensor configured to detect a physical quantity exhibited when the moving member is moving along the track member; and a diagnosis processing unit configured to take in an output signal from the sensor, to thereby generate analysis data, compare the analysis data with threshold value data, determine whether the rolling guide device has an abnormality in accordance with a comparison result, and output a determination result, wherein the diagnosis processing unit has: a first processing mode of taking in the output signal from the sensor for a data collection time period T1, to thereby generate the analysis data; and a second processing mode of taking in the output signal from the sensor for a data collection time period T2 longer than the data collection time period Ti, to thereby generate the analysis data, and wherein the diagnosis processing unit outputs the determination result.
    Type: Application
    Filed: February 2, 2018
    Publication date: November 28, 2019
    Applicant: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yoshiyuki Honjo
  • Publication number: 20190346341
    Abstract: A fault detection sensor-equipped actuator is provided which can easily detect a fault in at least one of a linear guide unit and a ball screw unit, using a shared sensor. In an actuator (10) including a linear guide unit (4) that guides linear movement of a movable body (1) and a ball screw unit (7) that drives the movable body (1) in an axial direction of a screw shaft (6), a sensor (18) configured to detect a fault in the actuator (10) is placed in a housing (11) where a coupling (12) that couples the screw shaft (6) and a motor (14) for rotating the screw shaft (6) is housed.
    Type: Application
    Filed: June 26, 2017
    Publication date: November 14, 2019
    Applicants: THK CO., LTD., THK CO., LTD.
    Inventors: Yoshiyuki Honjo, Shuhei Yamanaka
  • Patent number: 10401198
    Abstract: A position detection apparatus is provided which eliminates the necessity of space to affix a scale to a track member. A track member of a motion guide apparatus is provided with a through hole into which a fastening member to fasten the track member to a base can be inserted. A carriage that is movably assembled to the track member via a rolling element is provided with magnets generating a magnetic field toward the track member. Magnetic sensors that detect a change in the magnetic fields of the magnets with the travel of the magnets relative to the track member are placed within the magnetic fields of the magnets.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: September 3, 2019
    Assignee: THK Co., Ltd.
    Inventors: Shuhei Yamanaka, Yoshinobu Moriyuki, Takashi Oshida
  • Publication number: 20180321060
    Abstract: A position detection apparatus is provided which eliminates the necessity of space to affix a scale to a track member. A track member of a motion guide apparatus is provided with a through hole into which a fastening member to fasten the track member to a base can be inserted. A carriage that is movably assembled to the track member via a rolling element is provided with magnets generating a magnetic field toward the track member. Magnetic sensors that detect a change in the magnetic fields of the magnets with the travel of the magnets relative to the track member are placed within the magnetic fields of the magnets.
    Type: Application
    Filed: October 14, 2016
    Publication date: November 8, 2018
    Inventors: Shuhei YAMANAKA, Yoshinobu MORIYUKI, Takashi OSHIDA
  • Patent number: 10020767
    Abstract: A linear motor device includes a linear motor and a controller that applies pressure to a pressurizing target by moving a needle provided with the linear motor. The controller includes: a speed-change position-setting unit that calculates a deceleration start position, which is a position where a movement speed of the needle starts to be reduced from a first speed to a second speed when the pressurizing target start to be pressurized, based on a distance required to reduce the movement speed of the needle from the first speed to the second speed which is lower than the first speed and at which pressure applied to the pressurizing target when the needle comes into contact with the pressurizing target is equal to or lower than a predetermined pressure; and a position determination unit that drives the needle of the linear motor at the first speed and at the second speed.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: July 10, 2018
    Assignee: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yuki Nomura
  • Patent number: 9948218
    Abstract: This linear motor apparatus includes: a first linear motor and a second linear motor, movable bodies of which move in the same direction in a linked manner; a first control portion that causes the first linear motor to produce thrust to apply a load to a pressurizing target via the movable bodies; and a second control portion that causes the second linear motor to produce thrust and controls the thrust, wherein, if the first control portion is causing a load to be applied to the pressurizing target, then the second control portion causes the second linear motor to produce thrust that cancels an external force produced to the movable bodies.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: April 17, 2018
    Assignee: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yuki Nomura, Tsuyoshi Inda
  • Publication number: 20170207734
    Abstract: This linear motor apparatus includes: a first linear motor and a second linear motor, movable bodies of which move in the same direction in a linked manner; a first control portion that causes the first linear motor to produce thrust to apply a load to a pressurizing target via the movable bodies; and a second control portion that causes the second linear motor to produce thrust and controls the thrust, wherein, if the first control portion is causing a load to be applied to the pressurizing target, then the second control portion causes the second linear motor to produce thrust that cancels an external force produced to the movable bodies.
    Type: Application
    Filed: July 24, 2015
    Publication date: July 20, 2017
    Applicant: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yuki Nomura, Tsuyoshi Inda
  • Patent number: 9548641
    Abstract: A linear and rotary actuator system includes a shaft member moving linearly in an axial direction and rotating around an axis line, a hollow rotor surrounding the shaft member, a stator of a rotary motor having a space for holding the rotor and which rotates the rotor around the axis line, linear bearings, that rotates together with the rotor to transmit rotation of the rotor of the rotary motor to the shaft member and accepts linear movement of the shaft member, an angle measuring unit for measuring a rotation angle of the rotor, and a rotary motor driver for controlling the rotary motor in such a manner that the rotation angle of the rotor of the rotary motor measured by the angle measuring unit conforms to a command value. The rotation angle of the shaft member is controlled by controlling the rotation angle of the rotor of the rotary motor.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: January 17, 2017
    Assignee: THK CO., LTD.
    Inventors: Toshiyuki Aso, Shuhei Yamanaka, Takayuki Kuze
  • Patent number: 9318984
    Abstract: A linear motor device includes a linear motor and a control unit configured to apply a load to a pressurizing object by causing a movable part of the linear motor to move. After causing the movable part to move toward the pressurizing object at a predetermined first speed based on position control, the control unit controls the movable part to move by performing deceleration to a second speed which is slower than the first speed and at which the pressure applied to the pressurizing object is less than or equal to a predetermined pressure when the movable part starts to apply the pressure to the pressurizing object, and the control unit causes the movable part to move until the current flowing through the linear motor is greater than or equal to a predetermined current limit value.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: April 19, 2016
    Assignee: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yuki Nomura
  • Publication number: 20140333236
    Abstract: A linear motor device includes a linear motor and a control unit configured to apply a load to a pressurizing object by causing a movable part of the linear motor to move. After causing the movable part to move toward the pressurizing object at a predetermined first speed based on position control, the control unit controls the movable part to move by performing deceleration to a second speed which is slower than the first speed and at which the pressure applied to the pressurizing object is less than or equal to a predetermined pressure when the movable part starts to apply the pressure to the pressurizing object, and the control unit causes the movable part to move until the current flowing through the linear motor is greater than or equal to a predetermined current limit value.
    Type: Application
    Filed: December 5, 2012
    Publication date: November 13, 2014
    Applicant: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yuki Nomura
  • Publication number: 20140210396
    Abstract: A linear motor device includes a linear motor and a controller that applies pressure to a pressurizing target by moving a needle provided with the linear motor. The controller includes: a speed-change position-setting unit that calculates a deceleration start position, which is a position where a movement speed of the needle starts to be reduced from a first speed to a second speed when the pressurizing target start to be pressurized, based on a distance required to reduce the movement speed of the needle from the first speed to the second speed which is lower than the first speed and at which pressure applied to the pressurizing target when the needle comes into contact with the pressurizing target is equal to or lower than a predetermined pressure; and a position determination unit that drives the needle of the linear motor at the first speed and at the second speed.
    Type: Application
    Filed: September 6, 2012
    Publication date: July 31, 2014
    Applicant: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yuki Nomura
  • Publication number: 20140159551
    Abstract: A linear and rotary actuator system includes a shaft member moving linearly in an axial direction and rotating around an axis line, a hollow rotor surrounding the shaft member, a stator of a rotary motor having a space for holding the rotor and which rotates the rotor around the axis line, linear bearings, that rotates together with the rotor to transmit rotation of the rotor of the rotary motor to the shaft member and accepts linear movement of the shaft member, an angle measuring unit for measuring a rotation angle of the rotor, and a rotary motor driver for controlling the rotary motor in such a manner that the rotation angle of the rotor of the rotary motor measured by the angle measuring unit conforms to a command value. The rotation angle of the shaft member is controlled by controlling the rotation angle of the rotor of the rotary motor.
    Type: Application
    Filed: February 18, 2014
    Publication date: June 12, 2014
    Applicant: THK CO., LTD.
    Inventors: Toshiyuki ASO, Shuhei YAMANAKA, Takayuki KUZE
  • Patent number: 8686603
    Abstract: Provided is a linear and rotary actuator capable of bearing moment and load from a movable body and downsizing its radial dimension. A spline shaft is held in housings to be movable linearly in the axial direction and rotatable about the axis. The spline shaft is connected to a mover shaft of a linear motor. The spline shaft is surrounded with a hollow rotor of a rotary motor. The rotor is connected to a spline nut which transmits rotation of the rotor to the spline shaft by rotating together with the rotor and allows linear movement of the spline shaft. The rotor of the rotary motor is rotated by a stator of the rotary motor. The spline nut, the stator of the rotary motor and a stator of the linear motor are arranged in this order from an end of the spline shaft and mover shaft along the axial direction.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: April 1, 2014
    Assignee: THK Co., Ltd.
    Inventors: Toshiyuki Aso, Shuhei Yamanaka, Takayuki Kuze
  • Patent number: 8390153
    Abstract: Provided is a linear motor capable of simplifying assembling of a coil unit and stabilizing a coil pitch and the overall length of the coil unit. The linear motor has a rod 1 having magnets 3, a plurality of coils 4 arranged in the axial direction of the rod 1, a housing 2 covering the coils 4, and a coil holder 5 holding the coils 4 in the housing 2. The coil holder 5 includes a holder main body 5a elongating in the coil arrangement direction and a plurality of spacer portions 5b made of resin and each interposed between each adjacent two of the coils 4 to insulate the coils 4 from each other, the spacer portions 5b being formed integrally with the holder main body 5a.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: March 5, 2013
    Assignee: THK Co., Ltd.
    Inventors: Toshiyuki Aso, Shuhei Yamanaka, Kazuya Horiike, Taro Miyamoto, Yukitaka Ikeya, Tadao Yoneta
  • Patent number: 8362720
    Abstract: A position detection system includes a linear motor having a rod in which magnetic poles of N pole and S pole are arranged alternately in an axial direction and a plurality of coils surrounding the rod a magnetic sensor for detecting change in the direction of the magnetic field of the rod caused by linear movement of the rod relative to the coils to output a sine wave signal and a cosine wave signal which are 90° phase shifted with respect to one another, and a position detecting circuit for detecting a position of the rod relative to the coils. As the magnetic sensor detects the change in the direction of the magnetic field of the rod, the sine wave signal and the cosine wave signal output from the magnetic sensor hardly vary even when the distance between the rod and the magnetic sensor is changed.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: January 29, 2013
    Assignee: THK Co., Ltd.
    Inventors: Toshiyuki Aso, Shuhei Yamanaka, Toshiro Tojo