Patents Assigned to THK Co., LTD
  • Patent number: 10968956
    Abstract: Provided is a diagnosis method of appropriately recognizing a state of a rolling surface of a track member of a rolling guide device or a lubrication state of rolling elements using a sensor mounted to the rolling guide device. The diagnosis method is applied to a rolling guide device including: a track member having a rolling surface extending along a longitudinal direction of the track member; and a moving member, which is assembled to the track member through intermediation of a plurality of rolling elements configured to roll on the rolling surface so that the moving member is movable along the track member, and has an endless circulation path for the rolling elements.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: April 6, 2021
    Assignee: THK CO., LTD.
    Inventors: Kaoru Hoshide, Toshiro Tojo, Yoshiyuki Honjo, Ryuji Furusawa, Ayako Miyajima
  • 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
  • Publication number: 20210089045
    Abstract: A mobile robot includes a driving unit which changes a moving velocity and a traveling direction, a detection unit which detects a plurality of detection objects disposed along a traveling path to a target point, and a control unit which acquires a distance and a direction to the detection object detected by the detection unit, calculates a traveling direction in which the distance to the detection object and the direction of the detection object satisfy a predetermined relationship, and controls the driving unit based on the calculated traveling direction.
    Type: Application
    Filed: July 20, 2017
    Publication date: March 25, 2021
    Applicant: THK CO., LTD.
    Inventors: Hitoshi Kitano, Takashi Naito
  • Patent number: 10958195
    Abstract: A control device for a linear motor is disclosed which is provided with a current limiter and a driver. The current limiter outputs either a target current value or a limiting current command value. When the target current value is output as the current command value, the driver applies a voltage to the linear motor based of the value obtained by multiplying a first proportional gain by the difference between the current value of the current flowing to the linear motor and the current command value. When the limiting current command value is output as the current command value, the driver applies a voltage to the linear motor based of the value obtained by multiplying a second proportional gain, which is greater than the first proportional gain, by the difference between the current value of the current flowing to the linear motor and the limiting current command value.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: March 23, 2021
    Assignee: THK CO., LTD.
    Inventors: Yuki Nomura, Tsuyoshi Inda, Hideya Nakayama
  • Publication number: 20210070438
    Abstract: A flying robot comprising: a flying body unit; a propulsion portion comprising a plurality of propulsion units configured to cause propulsion to occur by driving rotor blades, the plurality of propulsion units being provided on the flying body unit; a working body unit; a manipulator unit configured to be capable of executing predetermined work and comprising one or more work manipulators provided on the working body unit; and connection units provided on the working body unit and the flying body unit so as to enable the flying body unit to be connected with and disconnected from the working body unit; wherein the flying robot executes the predetermined work by the work manipulators in a state in which the working body unit and the flying body unit are connected at the connection units. The flying robot is caused to execute a wide range of content of work as far as possible.
    Type: Application
    Filed: March 5, 2019
    Publication date: March 11, 2021
    Applicant: THK CO., LTD.
    Inventor: Kaoru Hoshide
  • Patent number: 10935074
    Abstract: Provided is a linear-motion bearing, including: an outer cylinder member made of a synthetic resin, the outer cylinder member having a plurality of endless steel ball circulation paths each including an outer-peripheral-side steel ball circulation path and an inner-peripheral-side steel ball circulation path, and having sheet-like spaces in regions that are opposed to the endless steel ball circulation paths, respectively; a plurality of steel balls accommodated and arrayed in the endless steel ball circulation paths; and a synthetic resin plate, which has an arc cross section, and is fitted to each of the sheet-like spaces, the synthetic resin plate including a metal piece at a position at which the synthetic resin plate is held in contact with a steel ball row in the inner-peripheral-side steel ball circulation path, the metal piece having an elongated shape in a direction along the steel ball row in the inner-peripheral-side steel ball circulation path, in which the elongated metal piece is curved so as to
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: March 2, 2021
    Assignee: THK CO., LTD.
    Inventors: Hiroto Fukutome, Hailian Yin
  • Patent number: 10935116
    Abstract: A seal member for a ball screw device, which is fixed to an axial end surface of a nut member of the ball screw device and is configured to seal a gap between the nut member and the screw shaft, the seal member including: a plurality of base plates which each have a through hole having an inner diameter larger than an outer diameter of the screw shaft; a spacer plate, which is sandwiched between two base plates adjacent to each other, and has a seal accommodation hole having an inner diameter larger than an inner diameter of a through hole of the base plates; and a seal plate, which has a shaft-fitting hole corresponding to a sectional shape of the screw shaft in a direction perpendicular to an axial direction, and is arranged in the seal accommodation hole of the spacer plates.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: March 2, 2021
    Assignee: THK CO., LTD.
    Inventors: Yuji Kubota, Futoshi Nakamura, Tetsuhiro Nishide, Kotaro Kawai, Bin Zhao, Tomoyuki Sugiyama
  • Publication number: 20210047035
    Abstract: A flying robot executing predetermined work, the flying robot comprising: a body unit; and a propulsion portion comprising a plurality of propulsion units configured to cause propulsion to occur by driving rotor blades, the plurality of propulsion units being provided on the body unit; the flying robot further comprising: a contact support unit configured to contact a predetermined contact surface to be capable of supporting at least a part of the body unit; a sensor configured to detect an inclination of the body unit; and a control unit configured to, when the contact support unit contacts the predetermined contact surface, and the predetermined work is being performed, execute posture control to drive at least one of the plurality of propulsion units based on the inclination of the body unit detected by the sensor so that the inclination of the body unit is kept within a predetermined angle range.
    Type: Application
    Filed: March 5, 2019
    Publication date: February 18, 2021
    Applicant: THK CO., LTD.
    Inventor: Kaoru Hoshide
  • Patent number: 10920825
    Abstract: Provided is a motion guide device load measuring system that can accurately measure loads acting on a motion guide device in use. The load measuring system includes a position detecting unit (4) for detecting the position of a sliding member (12) relative to a track member (11) in a direction of relative movement, and at least one sensor (2a-2d, 3a-3d) for detecting the relative displacement of the sliding member (12) relative to the track member (11) in a radial direction and/or a horizontal direction. A calculating unit (6) calculates loads acting on the motion guide device (1), in association with the position of the sliding member (12), on the basis of position information detected by the position detecting unit (4) and displacement information detected by one or more of the sensors (2a-2d, 3a-3d).
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: February 16, 2021
    Assignee: THK CO., LTD.
    Inventors: Yusuke Asano, Tetsuhiro Nishide, Takuya Horie, Shinji Aoki, Hiroyuki Takizawa
  • Patent number: 10920849
    Abstract: Provided is a damping member which can be easily mounted to a rolling guide device already in use, can avoid an increase in size of the rolling guide device, and can easily enhance a damping force in an axial direction exerted by the rolling guide device. The damping member is applied to the rolling guide device in which a moving block is assembled to a track rail through intermediation of a plurality of rolling elements, is provided to the track rail in series with the moving block, and includes: a friction member which includes a sliding contact pad in contact with at least the track rail; and a fixing holder, which includes a holding portion configured to cover the friction member so as to press the sliding contact pad against the track rail, and is configured to couple the friction member to the moving block.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: February 16, 2021
    Assignee: THK CO., LTD.
    Inventors: Keisuke Nakakubo, Junichi Washida, Tetsuya Fukumoto, Noriaki Chikamoto, Tadashi Nakano
  • Patent number: 10914341
    Abstract: The motion guide device includes a lubricant supply passage provided in at least one of a pair of cover members provided to a movable member and configured to supply lubricant to an endless circulation passage, in which the lubricant supply passage includes at least a first lubricant supply passage ? formed to extend in a direction orthogonal to a longitudinal direction of the track member from at least one of a left side surface and a right side surface of the cover member, and a second lubricant supply passage ? connected to the first lubricant supply passage ?, and a passage shape in a place connected to the first lubricant supply passage ? of the second lubricant supply passage ? is configured as a diameter-expanded hollow section having a diameter more expanded than a passage shape of another place. Thus, a new form of a cover member is provided.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: February 9, 2021
    Assignee: THK CO., LTD.
    Inventors: Hiroyuki Kishi, Mitsumasa Wada, Hiroyoshi Yasutake, Eriko Oshima
  • Patent number: 10913536
    Abstract: This linear movement guide device is provided with a track rail, a slider block attached to the track rail so as to be capable of movement relative thereto via a plurality of rolling bodies, and a position-determining pin which restricts the relative movement between the slider block and the track rail, wherein: the track rail is provided with a securing hole for securing the track rail to a base member, and a position-determining hole into which the position-determining pin is inserted; the slider block is provided with a rocker bearing part having an attachment hole into which a rocker shaft is inserted, and also provided with a connecting hole into which the position-determining pin is inserted; and the attachment hole and the connecting hole are each positioned in a location that avoids the center of the slider block in the lengthwise direction thereof.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: February 9, 2021
    Assignee: THK CO., LTD.
    Inventors: Hiroaki Mochizuki, Eiji Hosaka, Hiroomi Kuribayashi, Toshiro Minami, Akito Kaneko
  • Patent number: 10914365
    Abstract: A ball screw spline with reduced size and weight includes: a shaft formed in such a manner that a helical ball screw groove and a straight ball spline groove intersect each other; a ball screw nut having a helical ball screw groove facing the ball screw groove in the shaft, the ball screw nut being configured to allow recirculating a screw ball fitting in the ball screw groove in the shaft; and a ball spline outer race having a straight ball spline groove facing the ball spline groove in the shaft, the ball spline outer race being configured to allow recirculating a spline ball fitting in the ball spline groove in the shaft. The ball screw groove in the shaft is made as deep as or deeper than the ball spline groove in the shaft, and the screw ball is made smaller in diameter than the spline ball.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: February 9, 2021
    Assignee: THK CO., LTD.
    Inventor: Yohei Amemiya
  • Patent number: 10900519
    Abstract: A ball housing band is provided which can encourage increases in precision and rigidity of a motion guide apparatus and make the motion guide apparatus compact. A ball housing band includes: a housing band including a band formed with ends, the band having at least two rows of opening portions, and a plurality of spacers placed between the opening portions of the rows; and at least two rows of balls housed in the at least two rows of the opening portions. One of adjacent rows of and the other row of the balls are placed in a staggered arrangement in a state where the spacers are disposed between the balls and between the balls. The one row of the balls overlap the other row of the balls as viewed in the length direction of the ball housing band.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: January 26, 2021
    Assignee: THK CO., LTD.
    Inventors: Toru Takahashi, Ryuichi Yamakoshi
  • Publication number: 20200408275
    Abstract: Provided is a damping member which can be easily mounted to a rolling guide device already in use, can avoid an increase in size of the rolling guide device, and can easily enhance a damping force in an axial direction exerted by the rolling guide device. The damping member is applied to the rolling guide device in which a moving block is assembled to a track rail through intermediation of a plurality of rolling elements, is provided to the track rail in series with the moving block, and includes: a friction member which includes a sliding contact pad in contact with at least the track rail; and a fixing holder, which includes a holding portion configured to cover the friction member so as to press the sliding contact pad against the track rail, and is configured to couple the friction member to the moving block.
    Type: Application
    Filed: February 15, 2018
    Publication date: December 31, 2020
    Applicant: THK CO., LTD.
    Inventors: Keisuke Nakakubo, Junichi Washida, Tetsuya Fukumoto, Noriaki Chikamoto, Tadashi Nakano
  • Publication number: 20200408290
    Abstract: A seal member for a ball screw device, which is fixed to an axial end surface of a nut member of the ball screw device and is configured to seal a gap between the nut member and the screw shaft, the seal member including: a plurality of base plates which each have a through hole having an inner diameter larger than an outer diameter of the screw shaft; a spacer plate, which is sandwiched between two base plates adjacent to each other, and has a seal accommodation hole having an inner diameter larger than an inner diameter of a through hole of the base plates; and a seal plate, which has a shaft-fitting hole corresponding to a sectional shape of the screw shaft in a direction perpendicular to an axial direction, and is arranged in the seal accommodation hole of the spacer plates.
    Type: Application
    Filed: January 5, 2018
    Publication date: December 31, 2020
    Applicant: THK CO., LTD.
    Inventors: Yuji Kubota, Futoshi Nakamura, Tetsuhiro Nishide, Kotaro Kawai, Bin Zhao, Tomoyuki Sugiyama
  • Patent number: 10876575
    Abstract: A motion guide device is formed of: a track member including a base portion extending along a longitudinal direction, and a pair of wall portions erected from both edges of the base portion in a width direction, and having rolling element rolling grooves formed along a longitudinal direction; and a moving member which is assembled in a movable manner along the longitudinal direction between the wall portions, and to which a pair of guide members are assembled, load rolling element rolling grooves which correspond to the rolling element rolling grooves being formed in the guide members, wherein at least either one of the guide members is equipped with a biasing member on a surface of the guide member on a side opposite to a surface of the guide member on which the load rolling element rolling groove is formed.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: December 29, 2020
    Assignee: THK CO., LTD.
    Inventors: Kazuto Homma, Kenichi Hasebe, Toshihisa Maeda, Junichi Sakai, Nobuyuki Maki, Kaoru Hoshide
  • Publication number: 20200401158
    Abstract: This image processing device includes: a detection object including cells having first cells capable of reflecting emitted light and second cells incapable of reflecting the emitted light, the cells being squares or rectangles, the first cells and the second cells being arranged in an a×a or a×b (where a, b=3, 4, 5, 6, . . . ) matrix on a two-dimensional plane; and a detector including: an illuminator emitting light; imagers imaging, by a camera, light reflected from the first cells after the first cells and the second cells constituting the detection object are illuminated with the light emitted from the illuminator; and a calculator obtaining information set on the detection object 11, based on imaged data items taken by the imagers. Such a configuration can accurately identify a compact marker and measure the distance, and achieve a system inexpensively.
    Type: Application
    Filed: November 15, 2018
    Publication date: December 24, 2020
    Applicant: THK CO., LTD.
    Inventors: Hitoshi Kitano, Tsubasa Usui
  • Publication number: 20200391390
    Abstract: In order to extend a life span of a flexible cable passing through a movable portion, provided is a hand mechanism which has a plurality of fingers and grips an object with the fingers, including: a flexible cable; a joint which flexes or extends with the grip of the object, has a path for the flexible cable, and has a first surface and a second surface that is a surface bending from the first surface at a bending portion in the path; and a sheet which is provided between the first surface and the flexible cable to have flexibility and is formed such that a gap is provided between the second surface and the sheet.
    Type: Application
    Filed: September 21, 2018
    Publication date: December 17, 2020
    Applicant: THK CO., LTD.
    Inventors: Yoshimasa Endo, Kenji Hidaka
  • Publication number: 20200386270
    Abstract: A motion guide apparatus is provided which can make a carriage compact without reducing a rated load and an allowable load. The motion guide apparatus includes: a track member (1) and a carriage (2) that moves along the track member (1). A circulation path (7) of the carriage (2) includes a loaded path (C1), a return path (C2) parallel to the loaded path (C1), and a substantially U-shaped turn path (C3) connected to the loaded path (C1) and the return path (C2). At least a part of the turn path (C3) bends in side view in a direction where the loaded path (C1) and the return path (C2) coincide.
    Type: Application
    Filed: March 14, 2018
    Publication date: December 10, 2020
    Applicant: THK CO., LTD.
    Inventors: Toru Takahashi, Ryuichi Yamakoshi