Patents Assigned to THK Co., LTD
  • Publication number: 20190353991
    Abstract: A projector apparatus that can effectively reduce bending of a base plate supporting a lens shifting unit thereon and facilitates replacement of unit parts in the event of a failure is provided. The projector apparatus includes: a base plate attached inside a projector body; a lens supporting unit attached to the base plate and supporting a projection lens so as to be movable relative to the base plate; guiding mechanisms for guiding the lens supporting unit so as to be freely movable in a horizontal direction and a normal direction relative to the base plate; and fixing devices which fix the base plate to the projector body. The fixing devices include a plurality of first fixing devices provided at a peripheral edge of the base plate, and second fixing devices provided on an inner side of the plurality of first fixing devices.
    Type: Application
    Filed: November 2, 2017
    Publication date: November 21, 2019
    Applicants: THK CO., LTD., NEC DISPLAY SOLUTIONS, LTD.
    Inventors: Marie Shimamura, Jun Hirota, Hajime Fukushima, Kunitaka Furuichi
  • 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
  • Publication number: 20190345963
    Abstract: A device fixing apparatus, which is capable of suitably changing a fixing position of the device with respect to, for example, a floor surface of the structure, the device fixing apparatus including: a track rail, which is provided to the structure, has a plurality of rolling surfaces extending in a longitudinal direction of the track rail, and has a plurality of positioning holes at constant intervals along the longitudinal direction; a fixing terminal, which includes a plurality of guide wheels configured to roll on the track rail, and is configured to freely move by the guide wheels in the longitudinal direction of the track rail; and a restriction stud, which is mounted to the fixing terminal, and is suitably fitted to the positioning holes of the track rail to restrict movement of the fixing terminal with respect to the track rail.
    Type: Application
    Filed: December 13, 2017
    Publication date: November 14, 2019
    Applicant: THK CO., LTD.
    Inventors: Hiroaki Mochizuki, Eiji Hosaka
  • Publication number: 20190339483
    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: Application
    Filed: October 26, 2017
    Publication date: November 7, 2019
    Applicant: THK CO., LTD.
    Inventors: Jun Hirota, Marie Shimamura, Hirokazu Tatsuzuki, Hajime Fukushima
  • Patent number: 10465776
    Abstract: There is provided an actuator capable of downsizing the actuator in axial and radial directions of a motor. The actuator includes a motor having an output shaft, a motor housing into which the motor is housed, an outer race, an inner race assembled with the outer race to be rotatable, a cross-roller bearing supporting an object to be rotatable so that the object member is constituted to be rotatable, wherein the outer race is mounted to the motor housing, the inner race is clamped by a support member rotating in accordance with the rotation of the output shaft and the object member fixed to the support member.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: November 5, 2019
    Assignee: THK CO., LTD.
    Inventors: Masaki Nagatsuka, Yasuto Shiigi
  • Publication number: 20190315473
    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: Application
    Filed: December 15, 2017
    Publication date: October 17, 2019
    Applicant: THK CO., LTD.
    Inventors: Hiroaki Mochizuki, Eiji Hosaka, Hiroomi Kuribayashi, Toshiro Minami, Akito Kaneko
  • Patent number: 10444302
    Abstract: A foreign matter detecting device comprises a first yoke portion and a second yoke portion which adjoin a permanent magnet respectively. The both yoke portions are arranged while interposing a reference space therebetween. Further, a detour yoke portion is arranged. A magnetic resistance of the first detour space being smaller than a magnetic resistance of the predetermined reference space, and magnetic resistances of the second detour space and the first detour space being larger than the magnetic resistance of the predetermined reference space. A detection signal in relation to the foreign matter is outputted on the basis of a magnetic flux density provided in at least any one of spaces of the reference space and the first detour space, corresponding to an amount of retention of the foreign matter in a retaining portion which is provided so that the foreign matter is retained in the second detour space.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: October 15, 2019
    Assignee: THK CO., LTD.
    Inventor: Yoshinobu Moriyuki
  • Patent number: 10442149
    Abstract: This pressing device includes an actuator, a pressing unit provided on a movable element of the actuator, a movement quantity detector for detecting a movement quantity of the movable element and outputting movement quantity information indicating the movement quantity, and a drive device that moves the pressing unit to press a pressed object by supplying a drive current to the actuator based on the movement quantity information. The drive device controls an operation of the pressing unit using position control processing based on current information indicating the drive current and the movement quantity information. When the speed of the pressing unit is decelerated down to a predetermined lower limit speed, the drive device controls the speed of the pressing unit to be constant based on the current information, and when the current reaches a predetermined current value, determines that the pressing operation is performed.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: October 15, 2019
    Assignee: THK CO., LTD.
    Inventors: Yuki Nomura, Takeo Karaushi, Hideya Nakayama
  • Patent number: 10436248
    Abstract: Provided is a motion guide device, which includes: a track rail; rolling elements; a moving block, which has an endless circulation path; and a holding belt having pockets, wherein the holding belt has a pair of end portions opposed to each other through intermediation of a free rolling element in the endless circulation path, and wherein a condition of (X?Y)√óZ>(B+C)?A>0 is satisfied, where: A represents a path length of the endless circulation path; B represents a total length of the holding belt; C represents a diameter of the free rolling element; X represents a diameter of each of the pockets; Y represents a diameter of each of the rolling elements; and Z represents the number of the rolling elements arrayed in the holding belt.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: October 8, 2019
    Assignee: THK CO., LTD.
    Inventors: Shinji Aoki, Hiroki Irikawa
  • Patent number: 10436298
    Abstract: Provided a screw feeding device, in which a buffer mechanism is incorporated between a rod member and a nut member. The screw feeding device includes: a screw shaft; the nut member, which has a flange portion, the rod member, which has a mounting portion facing the flange portion and a hollow portion; and a buffer mechanism, which connects the flange portion and the mounting portion, in which the buffer mechanism includes: a plurality of shafts, a pair of separators, through which the plurality of shafts pass, and which is movable along the plurality of shafts; and an elastic member, provided between the pair of separators, in which the plurality of shafts include: a shaft, fixed to the flange portion; and a shaft fixed to the mounting portion.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: October 8, 2019
    Assignees: HIRATA CORPORATION, THK CO., LTD.
    Inventors: Bungo Matsumoto, Yuji Kubota, Tomoya Uchikoshi
  • Patent number: 10428872
    Abstract: A guide apparatus is provided which can increase a holding force that holds a table, a drawer, a cabinet, a device, or the like at a predetermined position. An engagement body (43) is placed on a second member (42b). A pair of plate spring portions (44a and 44b) is placed on a first member (41) in such a manner as to sandwich the engagement body (43). The pair of plate spring portions (44a and 44b) bend in such a manner that a minimum dimension between the pair of plate spring portions (44a and 44b) is smaller than a dimension (length) of the engagement body (43).
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: October 1, 2019
    Assignee: THK CO., LTD.
    Inventor: Hiroomi Kuribayashi
  • Patent number: 10422014
    Abstract: A heat-treatment device 10 includes a table 11 on which a ring-shaped workpiece W can be placed, and a pair of heat processing units 20 for heat-processing the peripheral surface of the workpiece W. The heat-treatment device 10 is used for obtaining the workpiece W having desired properties by the heat-processing the workpiece W while the pair of heat processing units 20 move in opposite directions along the peripheral surface of the workpiece W. The heat-treatment device 10 is configured in such a way that a pair of revolving arms 30 movable relative to the table 11 oscillate the pair of heat processing units 20 relative to the workpiece W, thereby heat-processing the peripheral surface of the workpiece W. By adopting such a configuration, it is possible to obtain a heat-treatment device heat-processing the entire circumference of a ring-shaped workpiece.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: September 24, 2019
    Assignees: THK CO., LTD., Denki Kogyo Company, Limited
    Inventors: Junzo Shimbe, Hiroshi Nakabayashi, Takayuki Sakanoue, Kazuki Yoshiya, Hiroyuki Kai, Shuji Masubuchi, Makoto Nagata
  • Patent number: 10422377
    Abstract: A rolling device includes: an inner member that has a raceway face; an outer member that has a raceway face facing the raceway face; and rolling elements that are disposed between both raceway faces in a rollable manner, wherein at least one of the inner member and the outer member has a space formed therein. Further, a method for manufacturing a rolling device including an inner member that has a raceway face, an outer member that has a raceway face facing the raceway face, rolling elements that are disposed between both raceway faces in a rollable manner, and a space that is formed inside at least one of the inner member and the outer member by a 3D printer.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: September 24, 2019
    Assignee: THK CO., LTD.
    Inventors: Eiji Hosaka, Hiroomi Kuribayashi
  • Patent number: 10415640
    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: November 22, 2016
    Date of Patent: September 17, 2019
    Assignee: THK CO., LTD.
    Inventors: Kazuto Homma, Akimasa Yoshida, Daisuke Yatsushiro, Takuya Iguchi
  • Patent number: 10411527
    Abstract: Disclosed is a linear motor that can exert a high propulsive force and reduce cogging. A stator has a plurality of core units in a stroke direction. Each of the core units has a first core having a first magnetic pole and a second magnetic pole, which is different in polarity from the first magnetic pole, coils wound around the first core, a second core having a third magnetic pole and a fourth magnetic pole, which is different in polarity from the third magnetic pole, and coils wound around the second core. The third magnetic pole faces the first magnetic pole, and the fourth magnetic pole faces the second magnetic pole. A movable element is sandwiched between the first magnetic poles and the third magnetic poles, and between the second magnetic poles and the fourth magnetic poles.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: September 10, 2019
    Assignee: THK Co., Ltd.
    Inventors: Hitoshi Shibata, Hiroshi Kaneshige, Katsuya Fukushima, Masashi Sugiura, Koichiro Morita
  • 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
  • Patent number: 10391629
    Abstract: An air pump apparatus is provided which uses an electric actuator that can electrically operate a pneumatic device such as a suction pad or air chuck. The air pump apparatus includes an air cylinder having a built-in piston, and an electric actuator configured to move the piston linearly and relatively to the air cylinder, using the electric motor as a drive source. Air under negative pressure and/or positive pressure generated by the electric actuator causing the piston of the air cylinder to move linearly is used to operate a pneumatic device.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: August 27, 2019
    Assignee: THK CO., LTD.
    Inventors: Koji Ozawa, Masaki Nagatsuka, Munehiro Iwata, Aiko Tagawa, Miki Tobita, Takashi Naito
  • Patent number: 10393243
    Abstract: There is provided an actuator capable of downsizing the actuator in axial and radial directions of a motor. The actuator includes a motor having an output shaft, a motor housing into which the motor is housed, an outer race, an inner race assembled with the outer race to be rotatable, a cross-roller bearing supporting an object to be rotatable so that the object member is constituted to be rotatable, wherein the outer race is mounted to the motor housing, the inner race is clamped by a support member rotating in accordance with the rotation of the output shaft and the object member fixed to the support member.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: August 27, 2019
    Assignee: THK CO., LTD.
    Inventors: Masaki Nagatsuka, Yasuto Shiigi
  • Patent number: 10393244
    Abstract: This rolling device 10 includes an inner member 11 provided with a rolling element rolling groove 11a, and an outer member 21 attached to the inner member 11 to be relatively movable via a plurality of rolling elements 12. The outer member 21 includes an outer member main body portion 22 including a loaded rolling element rolling groove 25 forming a loaded rolling element rolling raceway in cooperation with the rolling element rolling groove 11a and a non-loaded rolling element rolling raceway 33 arranged to correspond to the loaded rolling element rolling groove 25, and a pair of lids 24 attached to both end surfaces of the outer member main body portion 22 in a relatively-moving direction and having at least a part of a direction changing raceway 35 connecting one end of the loaded rolling element rolling raceway to one end of the non-loaded rolling element rolling raceway 33. Each of the lids 24 is provided with a projection portion 24b including at least the part of the direction changing raceway 35.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: August 27, 2019
    Assignee: THK CO., LTD.
    Inventors: Kazuya Horiike, Soshi Miyahara, Masakazu Takahashi
  • Publication number: 20190258023
    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: Application
    Filed: October 26, 2017
    Publication date: August 22, 2019
    Applicant: THK CO., LTD.
    Inventors: Jun Hirota, Marie Shimamura, Hajime Fukushima