Patents by Inventor Akihiko Fujimoto

Akihiko Fujimoto 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).

  • Publication number: 20200238413
    Abstract: A wire electrical discharge machine includes: a determination unit that determines whether or not a first route and a second route, each including an approach path, a machining path and an escape path in this order, are set in this order as a movement route of a wire electrode; and a wire movement control unit that, when the first route and the second route are determined to be set in a machining program in this order as the movement route of the wire electrode, causes the wire electrode to transition from the machining path of the first route to the machining path of the second route without moving the wire electrode along the escape path of the first route and the approach path of the second route.
    Type: Application
    Filed: January 16, 2020
    Publication date: July 30, 2020
    Inventors: Kousuke Ookubo, Akihiko Fujimoto
  • Patent number: 10500687
    Abstract: A tool magazine (40) is able to move among a machining position where a tool (2) attached to a spindle (30) machines a workpiece, a tool exchange position where the tool (2) attached to the spindle (30) is exchanged, and a retreat position where an automated workpiece carrying device is not disturbed in placing or removing of the workpiece with respect to a workpiece placing part (20). The workpiece is placed on the workpiece placing part (20) from above or removed upward from the workpiece placing part (20) by the automated workpiece carrying device.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: December 10, 2019
    Assignee: FANUC CORPORATION
    Inventors: Gaku Isobe, Akihiko Fujimoto
  • Patent number: 10442046
    Abstract: First and second V-shaped link structures are arranged in an overlapping manner such that a first fixed pin and a second fixed pin of the first V-shaped link structure are positioned relative to a movable pin to one side with respect to the direction parallel to the longitudinal direction of a guide rail while a first fixed pin and a second fixed pin of the second V-shaped link structure are positioned relative to a movable pin to the side opposite to that in the first V-shaped link structure.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: October 15, 2019
    Assignee: FANUC CORPORATION
    Inventors: Ryuutarou Ishikawa, Akihiko Fujimoto
  • Publication number: 20180339384
    Abstract: First and second V-shaped link structures are arranged in an overlapping manner such that a first fixed pin and a second fixed pin of the first V-shaped link structure are positioned relative to a movable pin to one side with respect to the direction parallel to the longitudinal direction of a guide rail while a first fixed pin and a second fixed pin of the second V-shaped link structure are positioned relative to a movable pin to the side opposite to that in the first V-shaped link structure.
    Type: Application
    Filed: May 21, 2018
    Publication date: November 29, 2018
    Applicant: FANUC CORPORATION
    Inventors: Ryuutarou Ishikawa, Akihiko Fujimoto
  • Publication number: 20180333814
    Abstract: A tool magazine (40) is able to move among a machining position where a tool (2) attached to a spindle (30) machines a workpiece, a tool exchange position where the tool (2) attached to the spindle (30) is exchanged, and a retreat position where an automated workpiece carrying device is not disturbed in placing or removing of the workpiece with respect to a workpiece placing part (20). The workpiece is placed on the workpiece placing part (20) from above or removed upward from the workpiece placing part (20) by the automated workpiece carrying device.
    Type: Application
    Filed: April 12, 2018
    Publication date: November 22, 2018
    Applicant: FANUC CORPORATION
    Inventors: Gaku ISOBE, Akihiko FUJIMOTO
  • Patent number: 9037300
    Abstract: A controller (10) for a machine tool (18) for tapping by a main shaft and a feed shaft, comprising an identifier unit (12) for identifying an index of the size of the tap, a temperature detector unit (19b) for detecting the temperature of a motor (19a) for the main shaft, an acceleration storage unit (21) for storing the acceleration of the main shaft corresponding to the index of the size of the tap, a rate storage unit (22) for storing the rate of varying the acceleration of the main shaft depending upon the temperature of the motor, and an acceleration calculation unit (16) for calculating a new acceleration of the main shaft by multiplying an acceleration determined from the index of the size of the tap and from the acceleration storage unit by a rate determined from the detected temperature and from the rate storage unit.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: May 19, 2015
    Assignee: FANUC Corporation
    Inventors: Susumu Maekawa, Akihiko Fujimoto
  • Patent number: 8783434
    Abstract: A hydraulic piston is housed in a cylinder chamber that is provided in a cover plate of a transmission case and that opens toward a pressing arm so that the hydraulic piston is capable of rotating the pressing arm by abutting against a rearward arm portion of the pressing arm, and a hydraulic pipe supplying pressure oil to the cylinder chamber is connected to the cover plate.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: July 22, 2014
    Assignees: Mitsubishi Nichiyu Forklift Co., Ltd., Okamura Corporation
    Inventors: Fujito Aikawa, Akihiko Fujimoto
  • Patent number: 8771132
    Abstract: A brake hub (36) and a second gear shaft (22) are rotatably supported by a bearing (42) and a bearing (43), the bearing (42) interposed between a projection (11D-1) of a support member (11D) disposed on the inner side of a recess (36a) of the brake hub and the inner peripheral surface of the recess, the bearing (43) interposed between a support member (11E) surrounding a top end portion of the brake hub and the top end portion of the brake hub. The transfer further comprises a disc pressing pin (50) inserted through a hole (11D-4) in the support member, a pressing plate (51) disposed on the outer side of the support member, and plate pressing means. The plate pressing means presses the pressing plate, the pressing plate presses the disc pressing pin, and the disc pressing pin presses a press brake disc (35C).
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: July 8, 2014
    Assignee: Mitsubishi Nichiyu Forklift Co., Ltd.
    Inventors: Akihiko Fujimoto, Shigeyoshi Umeda
  • Patent number: 8429997
    Abstract: A feeder for a machine tool adapted to move a table relative to a saddle by rotation of a motor includes a ball thread nut fixed to the saddle and a ball thread shaft that engages with the ball thread nut in a rotatable manner but is immovable in an axial direction of the ball thread shaft relative to the table. The motor is fixed to the table and the ball thread shaft is coupled to the motor. A sum of a movable distance of the table relative to the saddle and a length of the saddle in the axial direction is shorter than a length of the table in the axial direction. The feeder further includes rails fixed to the table on its surface where the motor is fixed and bearings that are fixed to the saddle and bear the rails.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: April 30, 2013
    Assignee: Fanuc Corporation
    Inventors: Akihiko Nagao, Akihiko Fujimoto, Naoki Sato, Akira Funakoshi
  • Patent number: 8405497
    Abstract: An alarm device for a clutch that issues an alarm indicating a lifetime expiration of the clutch that selectively connects and disconnects an input shaft to and from an output shaft, includes: a slip heat release threshold setting unit 104 that establishes a threshold criteria as to a clutch damage or the clutch lifetime, in a form of a relation between a heat release generated in a clutch slip operation and a frequency of the heat release occurrences; and a slip heat release calculator 105 that calculates the heat release during the clutch operation, based on a hydraulic oil pressure in an actual clutch operation and a relative circumferential speed between input and output shafts, the alarm device 11 issues the alarm based on the calculation result through the slip heat release calculating means 105 and the slip heat release threshold setting means 104.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: March 26, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazunari Okabe, Akihiko Fujimoto, Takeshi Harasawa
  • Publication number: 20120318631
    Abstract: A hydraulic piston is housed in a cylinder chamber that is provided in a cover plate of a transmission case and that opens toward a pressing arm so that the hydraulic piston is capable of rotating the pressing arm by abutting against a rearward arm portion of the pressing arm, and a hydraulic pipe supplying pressure oil to the cylinder chamber is connected to the cover plate.
    Type: Application
    Filed: October 25, 2010
    Publication date: December 20, 2012
    Inventors: Fujito Aikawa, Akihiko Fujimoto
  • Publication number: 20120296475
    Abstract: A controller (10) for a machine tool (18) for tapping by a main shaft and a feed shaft, comprising an identifier unit (12) for identifying an index of the size of the tap, a temperature detector unit (19b) for detecting the temperature of a motor (19a) for the main shaft, an acceleration storage unit (21) for storing the acceleration of the main shaft corresponding to the index of the size of the tap, a rate storage unit (22) for storing the rate of varying the acceleration of the main shaft depending upon the temperature of the motor, and an acceleration calculation unit (16) for calculating a new acceleration of the main shaft by multiplying an acceleration determined from the index of the size of the tap and from the acceleration storage unit by a rate determined from the detected temperature and from the rate storage unit.
    Type: Application
    Filed: February 22, 2012
    Publication date: November 22, 2012
    Applicant: FANUC Corporation
    Inventors: Susumu MAEKAWA, Akihiko Fujimoto
  • Publication number: 20110286811
    Abstract: A feeder for a machine tool moves a table relative to a saddle in one axial direction by rotation of a motor. A ball thread shaft is attached in a manner engaging with a nut fixed to the saddle, and rotatable but immovable relative to the table, and is coupled to the motor fixed to the table. A length obtained by adding a relative movement distance S of the saddle relative to the table to a size Ls of the saddle in a direction of movement relative to the table is shorter than a size Lt of the table in a direction of movement relative to the saddle (i.e., (Ls+S)<Lt).
    Type: Application
    Filed: February 25, 2011
    Publication date: November 24, 2011
    Applicant: FANUC CORPORATION
    Inventors: Akihiko NAGAO, Akihiko FUJIMOTO, Naoki SATO, Akira FUNAKOSHI
  • Publication number: 20110275468
    Abstract: An object of the present invention is to provide a transfer incorporating a wet brake which, for example, enables a gear shaft for a second gear and a sun gear to be supported by two bearings without inconveniences such as an increase in the axial dimension of the transfer. Accordingly, a brake hub (36) and a second gear shaft (22) are rotatably supported by a bearing (42) and a bearing (43), the bearing (42) interposed between a projection (11D-1) of a support member (11D) disposed on the inner side of a recess (36a) of the brake hub and the inner peripheral surface of the recess, the bearing (43) interposed between a support member (11E) surrounding a top end portion of the brake hub and the top end portion of the brake hub. The transfer further comprises a disc pressing pin (50) inserted through a hole (11D-4) in the support member, a pressing plate (51) disposed on the outer side of the support member, and plate pressing means.
    Type: Application
    Filed: September 28, 2009
    Publication date: November 10, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akihiko Fujimoto, Shigeyoshi Umeda
  • Patent number: 7836536
    Abstract: A floor section is formed at the rear of a vehicle body, at one side of the vehicle body. A lifting floor device having a floor body lifted and lowered by a lifting drive device is placed above the vehicle body. The floor body has a cutout at the left side of the floor body, at the rear half thereof. The right side of the floor body is used as a passage for a physically handicapped person. A stairway device is provided between the floor body and the floor section as a passage for an able-bodied person, on the floor body side in the cutout, and the stairway device is pivotable in a vertical plane. A lifting table is placed behind the vehicle body, on the left side thereof so that the lifting table can face the rear end of the passage for a physically handicapped person.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: November 23, 2010
    Assignee: TCM Corporation
    Inventors: Kenichi Motohashi, Akihiko Fujimoto, Koji Ichinose, Toru Kikuchi, Koichi Takemoto
  • Publication number: 20100282013
    Abstract: In a gear train in which a gear case encases a first gear meshing with a second gear having a diameter smaller than that of the first gear, a sufficient amount of lubricant is normally supplied to the upper second gear. As a result, it is possible to provide a lubrication structure of a gear train encased in a gear case designed to prevent occurrence of problems such as poor lubrication and seizure of a gear train.
    Type: Application
    Filed: March 17, 2009
    Publication date: November 11, 2010
    Applicant: Mitsubishi Heavy Industries, Ltd.
    Inventors: Akihiko Fujimoto, Kazunari Okabe
  • Publication number: 20100200357
    Abstract: Providing an alarm device for a clutch that issues an alarm the clutch lifetime prior to the clutch lifetime expiration, so that the information regarding the lifetime expiration is informed of; further, the failure protection measures for the clutch are adopted.
    Type: Application
    Filed: October 22, 2008
    Publication date: August 12, 2010
    Applicant: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazunari Okabe, Akihiko Fujimoto, Takeshi Harasawa
  • Publication number: 20090223005
    Abstract: A floor section is formed at the rear of a vehicle body, at one side of the vehicle body. A lifting floor device having a floor body lifted and lowered by a lifting drive device is placed above the vehicle body. The floor body has a cutout at the left side of the floor body, at the rear half thereof. The right side of the floor body is used as a passage for a physically handicapped person. A stairway device is provided between the floor body and the floor section as a passage for an able-bodied person, on the floor body side in the cutout, and the stairway device is pivotable in a vertical plane. A lifting table is placed behind the vehicle body, on the left side thereof so that the lifting table can face the rear end of the passage for a physically handicapped person.
    Type: Application
    Filed: January 31, 2007
    Publication date: September 10, 2009
    Applicant: TCM CORPORATION
    Inventors: Kenichi Motohashi, Akihiko Fujimoto, Koji Ichinose, Toru Kikuchi, Koichi Takemoto
  • Patent number: 7445587
    Abstract: An automatic tool changing method and an automatic tool changing device for a machine tool with a numerical controller capable of reducing the occurrence of impact due to tool exchange with a simple structure. A turret that rotates about a pivot shaft is provided on an arm and holds multiple tools. A swing cam CS that cooperates with a swing roller provided on the turret is provided on a spindle head. As the spindle head descends the turret rotates due to the action of the swing roller and the cam CS and exchanges tools. In order to lessen the impact that occurs at this time, the velocity of the spindle head is controlled. The ideal swing velocity pattern for the turret is obtained, and from this swing velocity pattern the swing position of the turret at each moment is obtained. From the swing roller and cam CS positions at this position the position of the spindle head 34 is obtained.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: November 4, 2008
    Assignee: Fanuc Ltd
    Inventors: Kunio Kojima, Akihiko Fujimoto, Takeru Komiya
  • Patent number: 7418783
    Abstract: For a spring sliding on the drawbar, the coil spring is used; the removal work for keeping the inner diameters of the coil springs aligned is performed such that the clearance between the outer diameter of the drawbar and the inner diameter of the coil spring becomes a minimum; and the coil springs are caused to be guided integrally with the drawbar. By doing so, the movement of the center of gravity of the spring that is caused by repeated rotational operation of the main spindle or repeated tool clamping operation will be reduced and the amplitude by vibration will be made smaller.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: September 2, 2008
    Assignee: Fanuc Ltd
    Inventors: Akihiko Fujimoto, Norio Watanabe, Masahiro Murota