Patents Assigned to THK Co., LTD
  • Patent number: 10738827
    Abstract: In a management system which manages user equipment installed in a prescribed space managed by a user, the user equipment including a plurality of motion guidance devices each including a track member, a moving member, and a plurality of displacement sensors which detect displacements of the moving member in a prescribed number of displacement directions in the moving member, on the basis of lifespan-related information corresponding to each of the plurality of motion guidance devices, a lifespan exhaustion ratio of each motion guidance device is calculated and, on the basis of the calculated lifespan exhaustion ratio, replacement object devices to be replaced within a prescribed period which constitute a part of or all of the plurality of motion guidance devices are determined. In addition, a user is notified of a replacement timing at which all of the determined replacement object devices in the user equipment are to be replaced.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: August 11, 2020
    Assignee: THK CO., LTD.
    Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
  • Patent number: 10724607
    Abstract: Provided is a speed reduction or speed increasing apparatus where the rotational stiffness can be increased, including a housing, a first crown gear, a support unit placed radially outward of the first crown gear to support the first crown gear to be capable of wave motion and incapable of rotation with respect to the housing, a second crown gear configured to be rotatable with respect to the housing, the second crown gear having a different number of teeth from the first crown gear, the second crown gear facing the first crown gear, and a cam unit configured to incline the first crown gear with respect to the second crown gear in such a manner that the first crown gear engages with the second crown gear, and to cause the first crown gear to undergo wave motion in such a manner that the location of contact moves.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: July 28, 2020
    Assignee: THK CO., LTD.
    Inventors: Hideo Saito, Yuichi Mizutani
  • Patent number: 10718927
    Abstract: A lens moving mechanism includes a lens mount unit on which a lens for projecting light is mounted, a lens guide unit which supports the lens mount unit and guides the lens mount unit in at least one axis direction among three orthogonal axis directions including an optical axis direction of the light, and a lens guide fixing unit to which the lens guide unit is fixed. The lens guide unit includes a plurality of linear motion guide devices each including a track body fixed to the lens guide fixing unit and a moving body moving along the track body. A plurality of track bodies are coaxially disposed in the lens guide fixing unit.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: July 21, 2020
    Assignee: THK CO., LTD.
    Inventors: Jun Hirota, Marie Shimamura, Hirokazu Tatsuzuki, Hajime Fukushima
  • Patent number: 10718378
    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: Grant
    Filed: August 6, 2019
    Date of Patent: July 21, 2020
    Assignee: THK CO., LTD.
    Inventors: Kazuto Homma, Akimasa Yoshida, Daisuke Yatsushiro, Takuya Iguchi
  • Patent number: 10712528
    Abstract: A lens moving mechanism includes a first lens guide unit which guides a lens mount, on which a lens for projecting light is mounted, in two orthogonal axis directions among three orthogonal axis directions including an optical axis direction of the light. The first lens guide unit includes a first track rail and a second track rail which are disposed to intersect each other in the two orthogonal axis directions, and one or a plurality of slider blocks which are mounted to be relatively movable on both or either of the first track rail and the second track rail. The one or plurality of slider blocks are disposed at an intersecting portion between the first track rail and the second track rail in one axis direction orthogonal to the two orthogonal axis directions, or are disposed to at least partially overlap each other in the one axis direction.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: July 14, 2020
    Assignee: THK CO., LTD.
    Inventors: Jun Hirota, Marie Shimamura, Hajime Fukushima
  • 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
  • Patent number: 10711838
    Abstract: This mobile-object-holding tool is mounted in place of a track body on a mobile object which moves along the track body, wherein the mobile object includes at least a pair of rolling element load rolling grooves through which a plurality of rolling elements roll and the mobile-object-holding tool includes a pair of holding parts which face the pair of rolling element load rolling grooves and hold the plurality of rolling elements, a biasing linking part which links the pair of holding parts together and biases the pair of holding parts away from each other, and a deformation regulating part which regulates a mounted contraction amount by which the biasing linking part is capable of contracting after being mounted on the mobile object to a predetermined value or less.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: July 14, 2020
    Assignee: THK CO., LTD.
    Inventors: Kaoru Hoshide, Katsuya Iida, Soshi Miyahara, Masakazu Takahashi, Shigeo Tomita
  • Publication number: 20200200217
    Abstract: A multi-row rolling element housing band is provided which can promote an increase in the degree of precision of a guide. At least three rolling element rows (17) to (19) are arranged in a band (15). Each second rolling element (18a) of the second rolling element row (18) is displaced by P/n in a length direction of the band (15) from each first rolling element (17a) of the first rolling element row (17). Each third rolling element (19a) of the third rolling element row (19) is displaced by P/n in the length direction of the band (15) from each second rolling element (18a) of the second rolling element row (18). P is the pitch between the first rolling elements (17a), and n is the number of rows.
    Type: Application
    Filed: May 14, 2018
    Publication date: June 25, 2020
    Applicant: THK CO., LTD.
    Inventors: Toru Takahashi, Yoshihiro Hamada, Ryuichi Yamakoshi
  • Patent number: 10690183
    Abstract: In this motion guide device (10), a track member (20) has a recess or protrusion (51) that is formed in a longitudinal direction, and a moving member (30) has a holding protrusion or holding recess (53) that corresponds to the recess or protrusion (51) formed in the track member (20). When force is applied in a direction that would cause relative separation of the moving member (30) and the track member (20), the holding protrusion or holding recess (53) holds onto the recess or protrusion (51) such that the moving member (30) and the track member (20) are unable to be separated. With this configuration, a motion guide device that is both compact and capable of withstanding a strong external load can be obtained.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: June 23, 2020
    Assignee: THK CO., LTD
    Inventors: Hiroaki Mochizuki, Eiji Hosaka, Hiroomi Kuribayashi, Toshiro Minami, Akito Kaneko
  • Publication number: 20200191199
    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: Application
    Filed: March 26, 2018
    Publication date: June 18, 2020
    Applicant: THK CO., LTD.
    Inventors: Toru Takahashi, Ryuichi Yamakoshi
  • Publication number: 20200171677
    Abstract: In a configuration in which a plurality of pressure sensors axe arranged on each finger portion of a hand mechanism, a state of contact between the finger portion and an object, a contact position in which the finger portion contacts the object, and so on are recognized more accurately. In a hand mechanism that includes a plurality of finger portions and grips an object using the finger portions, a plurality of pressure sensors are mounted on the outer surface of each finger portion, and two adjacent pressure sensors, among the plurality of pressure sensors, are arranged close to each other. Further, a flexible cover formed from a flexible, membranous member is attached to each finger portion so as to cover the plurality of pressure sensors. According to this configuration, even when the object contacts a dead zone, contact between the finger portion and the object can be detected accurately.
    Type: Application
    Filed: August 7, 2018
    Publication date: June 4, 2020
    Applicant: THK CO., LTD.
    Inventor: Yoshimasa Endo
  • Publication number: 20200171652
    Abstract: A hand mechanism grips an object more favorably, regardless of the attitude and surrounding conditions of the object. When an object is to be gripped by a hand mechanism having three or more finger portions, at least one finger portion among the three or more finger portions functions as a state-altering finger portion for altering the attitude or the position of the object while contacting the object, and at least two finger portions among the finger portions other than the finger portion functioning as the state-altering finger portion function as gripping finger portions for gripping the object in a state where the attitude or the position has been altered by the state-altering finger portion.
    Type: Application
    Filed: May 15, 2018
    Publication date: June 4, 2020
    Applicant: THK CO., LTD.
    Inventors: Shinji Kawabata, Yoshimasa Endo, Fumiya Koizumi, Yoshikazu Matsuo, Yuki Nomura, Toshiya Watanabe, Kenji Hidaka
  • Patent number: 10662999
    Abstract: This mobile-object-holding tool is mounted in place of a track body on a mobile object which moves along the track body, wherein the mobile object includes at least a pair of rolling element load rolling grooves through which a plurality of rolling elements roll and the mobile-object-holding tool includes a pair of holding parts which face the pair of rolling element load rolling grooves and hold the plurality of rolling elements, a biasing linking part which links the pair of holding parts together and biases the pair of holding parts away from each other, and a deformation regulating part which regulates a mounted contraction amount by which the biasing linking part is capable of contracting after being mounted on the mobile object to a predetermined value or less.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: May 26, 2020
    Assignee: THK CO., LTD.
    Inventors: Kaoru Hoshide, Katsuya Iida, Soshi Miyahara, Masakazu Takahashi, Shigeo Tomita
  • Publication number: 20200158172
    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: Application
    Filed: May 23, 2018
    Publication date: May 21, 2020
    Applicant: THK CO., LTD.
    Inventors: Hiroyuki Kishi, Mitsumasa Wada, Hiroyoshi Yasutake, Eriko Oshima
  • Publication number: 20200124091
    Abstract: In a management system which manages user equipment installed in a prescribed space managed by a user, the user equipment including a plurality of motion guidance devices each including a track member, a moving member, and a plurality of displacement sensors which detect displacements of the moving member in a prescribed number of displacement directions in the moving member, on the basis of lifespan-related information corresponding to each of the plurality of motion guidance devices, a lifespan exhaustion ratio of each motion guidance device is calculated and, on the basis of the calculated lifespan exhaustion ratio, replacement object devices to be replaced within a prescribed period which constitute a part of or all of the plurality of motion guidance devices are determined. In addition, a user is notified of a replacement timing at which all of the determined replacement object devices in the user equipment are to be replaced.
    Type: Application
    Filed: December 21, 2017
    Publication date: April 23, 2020
    Applicant: THK CO., LTD.
    Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
  • Publication number: 20200114508
    Abstract: A gripping system for gripping an object using a hand mechanism having at least two finger portions includes a specification unit that specifies a contactable portion and an unexposed portion, the contactable portion being a portion of the object that can be contacted by at least a first finger portion constituting one of the finger portions and the unexposed portion being a portion that is not exposed at the time of the determination, a first operation control unit that exposes the unexposed portion of the object, and a second operation control unit that grips the object in a state where the unexposed portion is exposed by bringing the first finger portion or the second finger portion into contact with the unexposed portion and bringing a finger portion other than the finger portion contacting the unexposed portion into contact with a predetermined surface of the object other than the unexposed portion.
    Type: Application
    Filed: May 15, 2018
    Publication date: April 16, 2020
    Applicant: THK CO., LTD.
    Inventors: Shinji Kawabata, Yoshikazu Matsuo, Yuki Nomura, Toshiya Watanabe
  • Patent number: 10612633
    Abstract: A screw apparatus with a seal ring is provided which has a reduced number of components and is easy to be assembled. The screw apparatus includes a screw shaft, a nut that includes a through-hole penetrated by the screw shaft and threadedly engages with the screw shaft via a rolling element, seal rings that include holes fitting the shape of a cross-section of the screw shaft, the cross-section being perpendicular to an axis thereof, and prevent the entry of dust into the inside of the nut, and/or prevent the leaking of lubricant in the nut, and a cap attached to the nut, the cap including protrusions fitted into indentations of the seal rings to effect positioning of the seal rings in a circumferential direction, the cap including a step in contact with the seal rings to effect positioning of the seal rings in an axial direction.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: April 7, 2020
    Assignee: THK CO., LTD.
    Inventors: Tetsuhiro Nishide, Masahiko Yoshino, Toshiaki Shinohara
  • Publication number: 20200103311
    Abstract: A lifespan diagnosis device for a motion guidance device including: a stress calculating means which calculates stresses during movement for each of virtual segments, the stresses during movement being stresses that occur in each segment during a movement of the moving member; a counting means which counts, for each of the segments, on the basis of the amount of displacement, the number of occurrences of the stresses during movement which repetitively occur with waving during a movement of the moving member along the track; and a diagnostic means which calculates, for each of the segments, a lifespan exhaustion ratio on the basis of magnitudes of the stresses during movement and the number of occurrences of the stresses during movement, and which diagnoses the lifespan of the motion guidance device on the basis of the calculated lifespan exhaustion ratios of the respective segments.
    Type: Application
    Filed: December 21, 2017
    Publication date: April 2, 2020
    Applicant: THK CO., LTD.
    Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
  • Patent number: 10606024
    Abstract: A lens moving mechanism includes a guide section which supports a lens mount unit on which a lens for projecting light is mounted and guides the lens mount unit in three orthogonal axis directions including an optical axis direction of the light, and a base member which supports a saddle guide unit of the guide section and is fixed to a projector main body. The saddle guide unit includes first linear motion guide devices which are fixed to the base member and guide the lens mount unit in an orthogonal-to-optical axis direction orthogonal to the optical axis direction.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: March 31, 2020
    Assignee: THK CO., LTD.
    Inventors: Jun Hirota, Marie Shimamura, Hajime Fukushima
  • 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