Patents by Inventor Tomofumi OHASHI
Tomofumi OHASHI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11480236Abstract: The ball screw device includes: a screw shaft having an N number (N is an integer equal to or larger than 2) of rolling grooves having the same lead; balls configured to roll in the rolling grooves; and a nut member, which is assembled to the screw shaft through intermediation of the balls, and includes one or a plurality of endless circulation paths configured to circulate the balls around the screw shaft. Each of the endless circulation paths of the nut member includes: an N number of load portions, which are configured to allow the balls to roll thereon while bearing a load, and correspond to the N number of rolling grooves, respectively; and an N number of no-load portions, which each couple adjacent ones of the load portions, and are configured to allow the balls to move between the N number of rolling grooves.Type: GrantFiled: December 7, 2018Date of Patent: October 25, 2022Assignee: THK CO., LTD.Inventors: Tomofumi Ohashi, Bin Zhao, Sho Iwashiro, Yoshihiro Kudo, Wataru Saito, Mika Oki, Takuya Miyazaki
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Patent number: 11371909Abstract: 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: GrantFiled: December 21, 2017Date of Patent: June 28, 2022Assignee: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Patent number: 11226001Abstract: 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: GrantFiled: January 15, 2018Date of Patent: January 18, 2022Assignee: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Patent number: 10844904Abstract: 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: GrantFiled: January 16, 2018Date of Patent: November 24, 2020Assignee: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Publication number: 20200355250Abstract: The ball screw device includes: a screw shaft having an N number (N is an integer equal to or larger than 2) of rolling grooves having the same lead; balls configured to roll in the rolling grooves; and a nut member, which is assembled to the screw shaft through intermediation of the balls, and includes one or a plurality of endless circulation paths configured to circulate the balls around the screw shaft. Each of the endless circulation paths of the nut member includes: an N number of load portions, which are configured to allow the balls to roll thereon while bearing a load, and correspond to the N number of rolling grooves, respectively; and an N number of no-load portions, which each couple adjacent ones of the load portions, and are configured to allow the balls to move between the N number of rolling grooves.Type: ApplicationFiled: December 7, 2018Publication date: November 12, 2020Applicant: THK CO., LTD.Inventors: Tomofumi Ohashi, Bin Zhao, Sho Iwashiro, Yoshihiro Kudo, Wataru Saito, Mika Oki, Takuya Miyazaki
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Patent number: 10781933Abstract: An actuator includes: a fixed internal gear that is formed in an annular shape, has a tooth on an inner peripheral surface thereof, and is non-rotatably provided; a movable internal gear that is formed in an annular shape, has a tooth on an inner peripheral surface thereof, and is rotatably provided coaxially with the fixed internal gear; a plurality of external gears that mesh with the fixed internal gear and the movable internal gear, and rotate along an inner peripheral surface of the fixed internal gear; and a carrier that is formed in an annular shape, rotatably supports the external gears, has a tooth for receiving a turning force from a drive motor on an outer peripheral surface thereof, transmits a turning force from the drive motor to the external gears, and is rotatably provided coaxially with the movable internal gear.Type: GrantFiled: February 2, 2018Date of Patent: September 22, 2020Assignee: Azbil CorporationInventor: Tomofumi Ohashi
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Patent number: 10754306Abstract: A new position control apparatus is provided which can reduce deviation caused by a non-linear spring characteristic of a rolling apparatus. In a position control apparatus (5) that controls the position of a movable body (1), in a positioning apparatus (9) including a rolling apparatus (2), a deviation e(t) or d of the movable body 1 caused by the non-linear spring characteristic of the rolling apparatus (2) is subtracted from or added to a position command Xref or r of the movable body (1). The deviation d is calculated by carrying out equivalent exchange on a control circuit for a friction force of the rolling apparatus (2), which is set as a quantity of the dimension of displacement.Type: GrantFiled: July 28, 2016Date of Patent: August 25, 2020Assignee: THK CO., LTD.Inventors: Shigeru Futami, Hitoshi Shibata, Tomofumi Ohashi
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Patent number: 10738827Abstract: 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: GrantFiled: December 21, 2017Date of Patent: August 11, 2020Assignee: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Publication number: 20200124091Abstract: 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: ApplicationFiled: December 21, 2017Publication date: April 23, 2020Applicant: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Publication number: 20200103311Abstract: 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: ApplicationFiled: December 21, 2017Publication date: April 2, 2020Applicant: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Patent number: 10605375Abstract: A setting/operating device includes a sun gear that rotates by receiving a rotating force from a driving motor; a first internal gear that has teeth on the inner peripheral surface thereof, the first internal gear being provided rotatably so as to surround the sun gear; a plurality of planetary gears that are disposed between the sun gear and the first internal gear, engaged with the sun gear and the first internal gear, and capable of rotating on axes thereof while revolving around the sun gear; a rotation mechanism that rotates by receiving rotating forces of the plurality of planetary gears; an output shaft that is coupled to the rotation mechanism; a housing that accommodates the sun gear, the first internal gear, the plurality of planetary gears, and the rotation mechanism; and a rotation control mechanism that switches between a rotatable state and an unrotatable state of the first internal gear.Type: GrantFiled: February 2, 2018Date of Patent: March 31, 2020Assignee: Azbil CorporationInventor: Tomofumi Ohashi
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Patent number: 10584800Abstract: A setting/operating device includes a first motor; a sun gear that rotates by receiving a rotating force from the first motor; a first internal gear disposed so as to surround the sun gear; a second motor that applies a force to the first internal gear in a direction in which rotation of the first internal gear is prevented; a plurality of planetary gears disposed between the sun gear and the first internal gear, engaged with the sun gear and the first internal gear, and capable of rotating on the axes thereof while revolving around the sun gear; a rotation mechanism that rotates by receiving rotating forces of the plurality of planetary gears; an output shaft that is coupled to the rotation mechanism; and a spring unit that applies a rotating force to the output shaft when supply of electric power to the first motor and the second motor is stopped.Type: GrantFiled: February 2, 2018Date of Patent: March 10, 2020Assignee: Azbil CorporationInventor: Tomofumi Ohashi
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Publication number: 20190383327Abstract: 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: ApplicationFiled: January 15, 2018Publication date: December 19, 2019Applicant: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Publication number: 20190376553Abstract: 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: ApplicationFiled: January 16, 2018Publication date: December 12, 2019Applicant: THK CO., LTD.Inventors: Akihiro Unno, Yuki Hayashi, Yuki Tanaka, Tomofumi Ohashi, Yusuke Asano, Katsunori Kogure
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Patent number: 10302211Abstract: A setting/operating device includes a sun gear that rotates by receiving a rotating force from a motor; a first internal gear that has teeth on the inner peripheral surface thereof and is provided so as to surround the sun gear; a plurality of planetary gears that are engaged with the sun gear and the first internal gear and capable of rotating on axes thereof while revolving around the sun gear; a rotation mechanism that rotates by receiving rotating forces of the plurality of planetary gears; an output shaft that is coupled to the rotation mechanism; a rotation control member made of a material that expands in response to voltage application; and a housing in which the rotation control member is disposed in a gap between the first internal gear and the housing so as to make contact with the first internal gear and the housing.Type: GrantFiled: February 2, 2018Date of Patent: May 28, 2019Assignee: Azbil CorporationInventor: Tomofumi Ohashi
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Patent number: 10072772Abstract: A setting/operating device including: a sun gear that is rotated by a rotational force from a drive motor; a fixed internal gear fixedly disposed to surround the sun gear and having teeth on an inner peripheral surface; a plurality of planetary gears disposed between the sun gear and the fixed internal gear that rotate in engagement with the sun gear and the fixed internal gear while revolving around the sun gear; a movable internal gear disposed coaxially with the fixed internal gear, having teeth that come into engagement with the planetary gear on an inner peripheral surface, and provided so as to be rotatable; an output shaft coupled to the movable internal gear and configured to rotate the valve stem of the regulating valve; and a manual operation mechanism that rotates the sun gear or the planetary gear by a force applied from the outside of a housing.Type: GrantFiled: October 20, 2016Date of Patent: September 11, 2018Assignee: Azbil CorporationInventor: Tomofumi Ohashi
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Publication number: 20180224020Abstract: A setting/operating device includes a sun gear that rotates by receiving a rotating force from a motor; a first internal gear that has teeth on the inner peripheral surface thereof and is provided so as to surround the sun gear; a plurality of planetary gears that are engaged with the sun gear and the first internal gear and capable of rotating on axes thereof while revolving around the sun gear; a rotation mechanism that rotates by receiving rotating forces of the plurality of planetary gears; an output shaft that is coupled to the rotation mechanism; a rotation control member made of a material that expands in response to voltage application; and a housing in which the rotation control member is disposed in a gap between the first internal gear and the housing so as to make contact with the first internal gear and the housing.Type: ApplicationFiled: February 2, 2018Publication date: August 9, 2018Applicant: Azbil CorporationInventor: Tomofumi OHASHI
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Publication number: 20180224019Abstract: An actuator includes: a fixed internal gear that is formed in an annular shape, has a tooth on an inner peripheral surface thereof, and is non-rotatably provided; a movable internal gear that is formed in an annular shape, has a tooth on an inner peripheral surface thereof, and is rotatably provided coaxially with the fixed internal gear; a plurality of external gears that mesh with the fixed internal gear and the movable internal gear, and rotate along an inner peripheral surface of the fixed internal gear; and a carrier that is formed in an annular shape, rotatably supports the external gears, has a tooth for receiving a turning force from a drive motor on an outer peripheral surface thereof, transmits a turning force from the drive motor to the external gears, and is rotatably provided coaxially with the movable internal gear.Type: ApplicationFiled: February 2, 2018Publication date: August 9, 2018Applicant: Azbil CorporationInventor: Tomofumi OHASHI
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Publication number: 20180224017Abstract: A setting/operating device includes a sun gear that rotates by receiving a rotating force from a driving motor; a first internal gear that has teeth on the inner peripheral surface thereof, the first internal gear being provided rotatably so as to surround the sun gear; a plurality of planetary gears that are disposed between the sun gear and the first internal gear, engaged with the sun gear and the first internal gear, and capable of rotating on axes thereof while revolving around the sun gear; a rotation mechanism that rotates by receiving rotating forces of the plurality of planetary gears; an output shaft that is coupled to the rotation mechanism; a housing that accommodates the sun gear, the first internal gear, the plurality of planetary gears, and the rotation mechanism; and a rotation control mechanism that switches between a rotatable state and an unrotatable state of the first internal gear.Type: ApplicationFiled: February 2, 2018Publication date: August 9, 2018Applicant: Azbil CorporationInventor: Tomofumi OHASHI
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Publication number: 20180224018Abstract: A setting/operating device includes a first motor; a sun gear that rotates by receiving a rotating force from the first motor; a first internal gear disposed so as to surround the sun gear; a second motor that applies a force to the first internal gear in a direction in which rotation of the first internal gear is prevented; a plurality of planetary gears disposed between the sun gear and the first internal gear, engaged with the sun gear and the first internal gear, and capable of rotating on the axes thereof while revolving around the sun gear; a rotation mechanism that rotates by receiving rotating forces of the plurality of planetary gears; an output shaft that is coupled to the rotation mechanism; and a spring unit that applies a rotating force to the output shaft when supply of electric power to the first motor and the second motor is stopped.Type: ApplicationFiled: February 2, 2018Publication date: August 9, 2018Applicant: Azbil CorporationInventor: Tomofumi OHASHI