Patents Assigned to THK Co., LTD
  • Patent number: 10591317
    Abstract: Provided is an encoder device capable of reducing interference between a magnetic field generated in a reference mark and a magnetic field generated in a scale. An encoder device is provided with a reference mark and a head. The reference mark has: a first scale coil; and a second scale coil electrically connected to the first scale coil. The head has: a transmission coil that transmits an electromagnetic wave without any contact to the first scale coil; a reception coil that receives an electromagnetic wave without any contact from the second scale coil; and electric circuits that generate a pulse for generating an origin signal from the electromagnetic wave received by the reception coil, if the transmission coil faces the first scale coil and the reception coil faces the second scale coil.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: March 17, 2020
    Assignee: THK CO., LTD.
    Inventors: Yoshinobu Moriyuki, Takashi Oshida
  • Patent number: 10576624
    Abstract: A rotational driving mechanism for driving a first member and a second member, which are part of a robot, to rotate relatively on a predetermined rotational driving plane by means of a linear motion actuator having a linear motion output shaft, includes: a first link unit with which the output shaft is connected, and which is arranged so as to be rotatable with respect to the first member through a first rotation shaft, and which is also arranged so as to be rotatable with respect to the second member side through a second rotation shaft; a second link unit which is connected with a first support shaft arranged at the first member side, and which is connected with a second support shaft arranged at the second member side, with a center distance between the first support shaft and the second support shaft being made constant.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: March 3, 2020
    Assignee: THK CO., LTD.
    Inventor: Masaki Nagatsuka
  • Patent number: 10571785
    Abstract: Provided is a lens alignment adjustment device capable of suitably correcting an angle accuracy of an optical axis of a lens unit with respect to a projector main body. A lens alignment adjustment device is provided to a projector to retain a projection lens, and is capable of adjusting inclination of an optical axis of the projection lens with respect to the projector. The lens alignment adjustment device includes: a base plate which is retained in a predetermined posture with respect to the projector; and a lens fixing plate to which the projection lens is fixed. The lens fixing plate is rockably coupled to the base plate through intermediation of a first center pin orthogonal to an optical axis of the projection lens. First adjusting means for setting an inclination angle of the lens fixing plate with respect to the base plate about the first center pin is provided.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: February 25, 2020
    Assignees: THK CO., LTD., SEIKO EPSON CORPORATION
    Inventors: Noriaki Chikamoto, Hiroyuki Furui, Akira Nemura
  • Patent number: 10570954
    Abstract: This rotation ring includes an inner ring with a first rolling element travel groove, an outer ring with a second rolling element travel groove that faces the first rolling element travel groove, and a plurality of rolling elements interposed between the first rolling element travel groove and the second rolling element travel groove. The plurality of rolling elements include a plurality of hard rolling elements disposed at intervals in the circumferential direction, and a plurality of soft rolling elements, at least three or more of which are disposed between the hard rolling elements adjacent to each other in the circumferential direction and which are lower in rigidity than the hard rolling elements.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: February 25, 2020
    Assignee: THK CO., LTD.
    Inventors: Hiroaki Mochizuki, Keisuke Hagiwara
  • 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
  • Patent number: 10562140
    Abstract: A press-fitting jig for a closure cap which is configured to press-fit a closure cap into a bolt mounting hole formed in a track rail of a guide device. The press-fitting jig is mounted to a moving block, which is assembled to the track rail through intermediation of a plurality of rolling elements and is configured to move on the track rail. The press-fitting jig includes: a finishing surface which is brought into slide contact with an upper surface of the track rail having the bolt mounting hole opened therein; and a guide surface, which is formed adjacent to the finishing surface and forms a wedge-shaped space with the track rail in a longitudinal direction of the track rail, the guide surface being configured to push the closure cap temporarily placed in the bolt mounting hole into the bolt mounting hole along with movement of the moving block.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: February 18, 2020
    Assignee: THK CO., LTD.
    Inventors: Akimasa Yoshida, Hiroyuki Kishi, Satoshi Kashiwagura
  • Patent number: 10550883
    Abstract: A slider slidably straddling over a guide rail, an attachment plate having a square U-shape attached to an end surface of the slider and including opposite vertical frames and a horizontal frame connecting the vertical frames, and a sliding scraper fitted in a square U-shape groove of the attachment plate and including opposite vertical portions and a horizontal portion connecting the opposite vertical portions, and a groove portion that is in sliding contact with the guide rail are provided, and protrusion portions at which the vertical frames and the vertical portions are in abutment with each other are provided an open end portion of an inner side surface of each of the opposite vertical frames of the attachment plate or an end portion of an outer side surface of each of the opposite vertical portions of the sliding scraper, the end portion facing the relevant open end portion.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: February 4, 2020
    Assignees: NITTA CORPORATION, THK CO., LTD.
    Inventors: Yoji Ishizaki, Atsushi Matsumoto, Kenichiro Aoki, Ryuji Furusawa, Sho Iwashiro
  • Publication number: 20200003255
    Abstract: An object is to provide a mounting structure of a bearing member which enables size and weight reduction of entire apparatus and also contributes to cost reduction thereof. The mounting structure of a bearing member includes: a bearing member for supporting a rotary shaft; a case member to which the bearing member is mounted; and a mounting plate for clamping the bearing member in an axial direction of the rotary shaft in conjunction with the case member, wherein the mounting plate includes a mounting portion of a counter member which is mounted to the case member and clamps the case member in the axial direction in conjunction with the counter member.
    Type: Application
    Filed: February 19, 2018
    Publication date: January 2, 2020
    Applicant: THK CO., LTD.
    Inventors: Jun Hirota, Junichi Iguchi, Hajime Fukushima
  • Patent number: 10520021
    Abstract: A motion guide device including a hollow track base that has a rolling element rolling face formed along a longitudinal direction and has a hollow portion formed to be substantially rectangular in section along the longitudinal direction, and a moving member that has a load rolling element rolling face formed in a position facing the rolling element rolling face, the moving member being assembled movably in the longitudinal direction of the track base via a plurality of rolling elements between the rolling element rolling face and the load rolling element rolling face, wherein in the track base, a heat-treated region in which heat treatment is applied to a region including the rolling element rolling face and a non-heat-treated region to which heat treatment is not applied are formed in a section orthogonal to the longitudinal direction, and the heat-treated region is not superimposed on corner portions of the hollow portion.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: December 31, 2019
    Assignee: THK CO., LTD.
    Inventors: Ryuji Furusawa, Atsuhiro Tanaka
  • Publication number: 20190383327
    Abstract: A machining control system for machining of a workpiece movably supported by a motion guidance device having a track member which extends along a longitudinal direction and a moving member which is arranged so as to oppose the track member via a rolling element being rollably arranged inside a rolling groove and which is relatively movable along the longitudinal direction of the track member, the machining control system including: an acquisition unit which acquires prescribed machining information related to a load applied to the motion guidance device when machining of the workpiece is performed by the machining device; and an output unit which generates machining correction information for correcting a prescribed control parameter for machining of the workpiece by the machining device on the basis of the prescribed machining information acquired by the acquisition unit and which outputs the generated machining correction information to a side of the machining device.
    Type: Application
    Filed: January 15, 2018
    Publication date: December 19, 2019
    Applicant: THK CO., LTD.
    Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
  • Patent number: 10508439
    Abstract: To provide a rotary inertia mass damper, which is capable of reducing an axial reaction force that is generated due to vibration having an excessive acceleration to the extent possible when the vibration is input, and of preventing breakage of the damper itself or a construction, provided is a rotary inertia mass damper, including: a first coupling portion, which is fixed to a first structure; a second coupling portion, which is coupled to a second structure; a screw shaft, which has one axial end connected to the first coupling portion and retained so as to be non-rotatable; a fixed barrel, which has a hollow portion for receiving the screw shaft, and is connected to the second coupling portion; and a rotary body, which is retained so as to be freely rotatable relative to the fixed barrel, is threadedly engaged with the screw shaft, and is configured to reciprocally rotate in accordance with advancing and retreating movement of the screw shaft relative to the fixed barrel.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: December 17, 2019
    Assignee: THK CO., LTD.
    Inventors: Yoshihito Watanabe, Ryoji Tomono, Takusho Nakamura, Makoto Nakamura
  • Publication number: 20190376553
    Abstract: To suitably set a control gain in feedback control while suppressing an increase in apparatus size. A workpiece transport control system includes: one or a plurality of motion guidance devices; a table on which a workpiece is to be placed; an actuator which imparts a driving force to the table; a control unit which performs transport control by feedback control; and a calculation unit which calculates a transport load applied from the workpiece to a moving member of each of the one or a plurality of motion guidance devices, wherein a control gain related to the feedback control in the transport control is adjusted on the basis of the transport load in each of the one or a plurality of motion guidance devices.
    Type: Application
    Filed: January 16, 2018
    Publication date: December 12, 2019
    Applicant: THK CO., LTD.
    Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
  • Patent number: 10495139
    Abstract: This ball join includes a ball stud with a spherical ball section and a shaft-shaped shaft section and a holder that rotatably bolds the ball section, and has a machining surface subjected to cutting in a welded portion obtained by welding the ball section and the shaft section, and the machining surface has a curve-shaped first corner section. In addition, a method for manufacturing this ball joint includes a welding step of welding the ball section and the shaft section and a cutting step of forming the machining surface by subjecting the welded portion obtained by welding the ball section and the shaft section to cutting, and the cutting step executes processing including forming the curve-shaped first corner section on the machining surface. Consequently, a ball joint with a large oscillation angle can be obtained.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: December 3, 2019
    Assignee: THK CO., LTD.
    Inventors: Tetsuhiro Nishide, Takuya Horie, Satoshi Kashiwagura
  • Patent number: 10498263
    Abstract: A control device for a linear motor includes a speed controller that calculates a current command value by an integration operation using a first integral value of a difference between a moving speed of a movable element provided in the linear motor and a speed command value calculated on the basis of a position command value, a current controller that applies a voltage to the linear motor on the basis of the current command value, and a correction value storage unit that stores the first integral value of the speed controller when the movable element remains at a position indicated by the position command value. When resuming control of the linear motor, the speed controller sets the first integral value stored in the correction value storage unit as an initial value for the integration operation before the brake controller turns off the brake device.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: December 3, 2019
    Assignee: THK CO., LTD.
    Inventors: Yuki Nomura, Takeo Karaushi, Hideya Nakayama, Tsuyoshi Inda
  • Patent number: 10495209
    Abstract: An actuator includes a track member provided with a base extending along a longitudinal direction and a pair of walls erected from opposite ends of the base in a width direction, with rolling-element rolling grooves formed along the longitudinal direction; and a moving member assembled movably along the longitudinal direction between the walls, with respective load rolling-element rolling grooves corresponding to the rolling-element rolling grooves being formed in the moving members; and a screw shaft passed through a through-hole formed in the moving member, with a screw rolling-element rolling groove formed in the screw shaft, the screw rolling-element rolling groove being spiral in shape, wherein the moving member has the nut member attached to the through-hole, with the screw load rolling-element rolling groove corresponding to the screw rolling-element rolling groove formed in the nut, the nut member is assembled via a flange member which includes a lubricant supply device.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: December 3, 2019
    Assignee: THK CO., LTD.
    Inventors: Kazuto Homma, Kenichi Hasebe, Toshihisa Maeda, Junichi Sakai, Nobuyuki Maki, Kaoru Hoshide
  • Publication number: 20190360570
    Abstract: A track member or a movable member constituting a motion guide device includes a rolling part formed of a metal material contacting with a plurality of rolling bodies and forming a rolling body rolling surface a, a mounting part formed of a metal material having a mounting hole for mounting an external member, and a track body or a movable body formed of FRP jointed with the rolling part and the mounting part and forming the track member or the movable member, and the mounting part and the track body or the movable body have joint holes, opened in a direction orthogonal to a lamination direction of FRP reinforced fiber sheets S forming the track body or the movable body at a time of the joint, and can be jointed using jointing means. An external member can be securely mounted to the motion guide device formed of FRP.
    Type: Application
    Filed: August 6, 2019
    Publication date: November 28, 2019
    Applicant: THK CO., LTD.
    Inventors: Kazuto Homma, Akimasa Yoshida, Daisuke Yatsushiro, Takuya Iguchi
  • 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
  • Patent number: D870540
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: December 24, 2019
    Assignee: THK CO., LTD.
    Inventors: Shinji Aoki, Takeshi Shimamura
  • Patent number: D875150
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: February 11, 2020
    Assignee: THK CO., LTD.
    Inventors: Hiroyuki Kishi, Mitsumasa Wada, Hiroyoshi Yasutake, Eriko Oshima
  • Patent number: D876209
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: February 25, 2020
    Assignee: THK CO., LTD.
    Inventors: Hiroaki Mochizuki, Hiroomi Kuribayashi, Akito Kaneko