Patents Assigned to THK Co., LTD
  • Publication number: 20190076972
    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: Application
    Filed: January 12, 2017
    Publication date: March 14, 2019
    Applicant: THK CO., LTD.
    Inventors: Akimasa Yoshida, Hiroyuki Kishi, Satoshi Kashiwagura
  • Publication number: 20190033696
    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: Application
    Filed: January 13, 2017
    Publication date: January 31, 2019
    Applicants: THK CO., LTD., SEIKO EPSON CORPORATION
    Inventors: Noriaki Chikamoto, Hiroyuki Furui, Akira Nemura
  • Publication number: 20190024713
    Abstract: Provided is a rolling guide device which is capable of directly recognizing an operation condition of a moving member with respect to a track member or a circulation state of rolling elements in an endless circulation path, the rolling guide device including: a track member having a rolling surface; and a moving member, which is assembled to the track member through intermediation of a large number of rolling elements which roll on the rolling surface, and has an endless circulation path for the rolling elements, the moving member including: a main body member having a load rolling surface and a no-load return path for the rolling elements, the load rolling surface being opposed to the rolling surface of the track member to define a load path for the rolling elements, a pair of covers, which have direction change paths for allowing the rolling elements to move between the load path and the no-load return path, and is mounted to the main body member; and a measurement plate, which is interposed at least betwee
    Type: Application
    Filed: January 11, 2017
    Publication date: January 24, 2019
    Applicant: THK CO., LTD.
    Inventors: Kaoru Hoshide, Toshiro Tojo, Yoshiyuki Honjo, Ryuji Furusawa, Ayako Miyajima
  • Publication number: 20190028042
    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: Application
    Filed: January 10, 2017
    Publication date: January 24, 2019
    Applicant: THK CO., LTD.
    Inventors: Yuki Nomura, Tsuyoshi Inda, Hideya Nakayama
  • Patent number: 10183690
    Abstract: This rotation-linear motion conversion apparatus (10) includes: a pinion shaft (20) in which a pinion gear (22) is formed; a rack bar (30) in which a rack gear (32) that engages with the pinion gear (22) and a support surface (31) along a longitudinal direction are formed; and a support part (40) that supports the rack bar (30) movably along the support surface (31). The support part (40) prevents a movement of the rack bar (30) in a direction X perpendicular to a surface (30a) in which the rack gear (32) is formed.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: January 22, 2019
    Assignee: THK CO., LTD.
    Inventors: Toshiro Minami, Yuji Tachikake, Toshihisa Sakamoto, Kazuhiko Akiyama
  • Patent number: 10174787
    Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: January 8, 2019
    Assignee: THK CO., LTD.
    Inventors: Junichi Sakai, Kaoru Hoshide, Shigeo Tomita, Yuki Nakamura, Nobuyuki Maki, Muten Iwamoto, Kazuya Horike, Kenji Narata, Katsunori Yamamura, Fukuji Nakano, Shigemi Nakamura, Yosuke Irie
  • Patent number: 10167652
    Abstract: A vertical seismic isolation device includes: a fixed frame; a movable frame arranged on the fixed frame; a support guide mechanism which allows only vertical movement of the movable frame; and a restoration member which maintains a constant distance between the movable frame and the fixed frame. The support guide mechanism includes: a track rail provided on the fixed frame; a moving block assembled to the track rail through rolling elements; a support leg, which has one end coupled to the moving block and another end coupled to the movable frame, and converts vertical movement of the movable frame into a motion of the moving block; and an auxiliary leg, which is half as long as the support leg, and has one end coupled to the support leg at an intermediate position in a longitudinal direction of the support leg and another end coupled to the fixed frame.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: January 1, 2019
    Assignee: THK CO., LTD.
    Inventors: Keisuke Nakakubo, Yoshihito Watanabe, Hiroaki Asakura, Tomokazu Oku, Tetsuya Fukumoto, Ryoji Tomono, Junichi Washida
  • Publication number: 20180375447
    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: Application
    Filed: December 21, 2016
    Publication date: December 27, 2018
    Applicant: THK CO., LTD.
    Inventors: Yuki Nomura, Takeo Karaushi, Hideya Nakayama, Tsuyoshi Inda
  • Publication number: 20180355917
    Abstract: The rotary table device includes a base, a motor, a rotary drive shaft and a cross-roller bearing. An outer ring is rotationally driven through engagement of a pinion gear formed at a shaft end of the rotary rive shaft with a rack gear formed on the outer ring and transmission of a rotary drive force from the rotary drive shaft to the outer ring. The outer ring is formed in a hollow cylindrical shape covering a side of an inner ring, includes a table capable of mounting an external member on one side of the hollow cylindrical shape, and is integrated with the rack gear formed over an entire circumference of the other side thereof. With such a configuration, a rotary table device that can realize reduction in height, size and weight can be provided.
    Type: Application
    Filed: November 15, 2016
    Publication date: December 13, 2018
    Applicant: THK CO., LTD.
    Inventors: Makoto Iizumi, Takahiro Mochizuki, Toshiyuki Mukaiyama, Kentaro Nishimura
  • Publication number: 20180355915
    Abstract: Provided is a motion guide device, which alleviates a tensile force acting on a holding belt when the holding belt circulates in an endless circulation path together with rolling elements, thereby being capable of preventing uneven wear of the holding belt.
    Type: Application
    Filed: December 1, 2016
    Publication date: December 13, 2018
    Applicant: THK CO., LTD.
    Inventors: Shinji Aoki, Hiroki Irikawa
  • Publication number: 20180355959
    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: November 22, 2016
    Publication date: December 13, 2018
    Applicant: THK CO., LTD.
    Inventors: Kazuto Homma, Akimasa Yoshida, Daisuke Yatsushiro, Takuya Iguchi
  • Publication number: 20180340569
    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: Application
    Filed: October 14, 2016
    Publication date: November 29, 2018
    Applicant: THK CO., LTD.
    Inventors: Hiroaki Mochizuki, Keisuke Hagiwara
  • Publication number: 20180328411
    Abstract: The lubricating oil supply device including: a storage body, which has a large number of air gaps thereinside, and is configured to retain the lubricating oil in the air gaps; a casing, which includes an accommodating chamber for the storage body, has an opening facing the raceway shaft and opening the accommodating chamber, and is fixed to the slide member; and a coating body, which is arranged in the opening of the casing to be held in abutment against the raceway shaft, and receives the lubricating oil to be supplied from the storage body, wherein the storage body has a cutout portion corresponding to the opening of the casing, and wherein the coating body has an air gap ratio smaller than an air gap ratio of the storage body and is sandwiched in the cutout portion of the storage body to push outward the cutout portion.
    Type: Application
    Filed: November 30, 2016
    Publication date: November 15, 2018
    Applicant: THK CO., LTD.
    Inventors: Masahiko Yoshino, Yuji Kubota, Yohei Amemiya
  • Patent number: 10125813
    Abstract: A motion guide apparatus ensures that a retaining portion retains a rolling element. A rolling element retainer having retaining portions that prevent a rolling element from falling out of a movable body, the retaining portions extending along a loaded rolling element rolling portion, is incorporated in the movable body of the motion guide apparatus. End plates are formed integrally with the retaining portions. Fall prevention portions to reduce the widths of openings between the retaining portions are provided to center parts of the retaining portions in a length direction thereof. The fall prevention portions are padding portions integrated with the retaining portions, the padding portions rising in such a manner as to reduce the widths of the openings, and/or projections integrated with the retaining portions, the projections touching the movable body in such a manner that the center parts of the retaining portions bend toward a track member.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: November 13, 2018
    Assignee: THK CO., LTD.
    Inventors: Junichi Sakai, Kaoru Hoshide, Shigeo Tomita, Yuki Nakamura, Nobuyuki Maki, Muten Iwamoto, Kazuya Horike, Kenji Narata, Katsunori Yamamura, Fukuji Nakano, Shigemi Nakamura, Yosuke Irie
  • Patent number: 10118290
    Abstract: A support structure for an upper half body of a robot includes: a columnar backbone pan extending in an upward direction from a haunch bone part of a robot; an upper half body support part connected to the backbone part; and a driving unit on which an arm unit of the robot is rotatably mounted and which has an accommodation space receiving at least a predetermined actuator for driving said arm unit to rotate from the outside of the arm unit, wherein the driving unit is connected to the upper half body support part and the haunch bone part at a first connection point on the upper half body support part which is away a predetermined distance from a connection point of the upper half body support part and the backbone part to a side thereof, and at a second connection point on the haunch bone part, respectively.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: November 6, 2018
    Assignee: THK CO., LTD.
    Inventor: Masaki Nagatsuka
  • Publication number: 20180305922
    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: Application
    Filed: October 19, 2016
    Publication date: October 25, 2018
    Applicant: THK CO., LTD.
    Inventors: Yoshihito Watanabe, Ryoji Tomono, Takusho Nakamura, Makoto Nakamura
  • Publication number: 20180290295
    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: Application
    Filed: October 27, 2015
    Publication date: October 11, 2018
    Applicant: THK Co., Ltd.
    Inventor: Masaki NAGATSUKA
  • Publication number: 20180291999
    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: Application
    Filed: September 9, 2016
    Publication date: October 11, 2018
    Applicant: THK CO., LTD.
    Inventors: Kazuto Homma, Kenichi Hasebe, Toshihisa Maeda, Junichi Sakai, Nobuyuki Maki, Kaoru Hoshide
  • Publication number: 20180283444
    Abstract: Provided is a seal member or a ball joint capable of satisfactorily maintaining sealing performance between a ball portion of a ball shank and a ball receiving portion of a holder for a long time even when the ball shank is used under a condition that the ball shank is pivoted repeatedly with respect to the holder at a large pivot angle and at high speed. The seal member includes: a base portion having an annular ring shape and is to be fixed to the holder; a retaining portion formed on an inner peripheral side of the base portion integrally with the base portion and is recessed into a conical shape toward the holder; and a lip portion formed along an inner peripheral edge of the retaining portion so as to be held in sliding contact with a spherical surface of the ball portion of the ball shank.
    Type: Application
    Filed: March 22, 2018
    Publication date: October 4, 2018
    Applicants: FANUC CORPORATION, THK CO., LTD.
    Inventors: Yunfeng Wu, Satoshi Kashiwagura
  • Patent number: D835492
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: December 11, 2018
    Assignee: THK CO., LTD.
    Inventors: Hiroaki Mochizuki, Eiji Hosaka, Hiroomi Kuribayashi, Akito Kaneko, Keisuke Hagiwara