Patents Assigned to Kitagawa Iron Works Co., Ltd.
  • Patent number: 11000904
    Abstract: An inner circumferential surface of a chuck body (2) has three fitting recesses (22) curved as viewed from a rotational axis (C1). An outward elastic deformation that occurs, through gripping of a work (W1) with top jaws (5), at portions of a plunger (3) which correspond to slide holes (31a) causes the portions deformed by the elastic deformation to slide on the respective recessed portions (22) so that the plunger (3) is moved to cause a symmetry axis (Y1) of the slide hole (31a) to coincide with a symmetry axis (Y2) of a guide groove (25) of the chuck body (2).
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: May 11, 2021
    Assignee: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio Nishimiya
  • Publication number: 20210046557
    Abstract: An object of the present invention is to obtain information corresponding to information, which is readable by sight, but no longer visible. The present invention provides a chuck mechanism comprising: a chuck body including an installation surface and a side surface; and a master jaw provided on the installation surface of the chuck body and configured to move in a radial direction of the chuck body, wherein a first marking is provided on the installation surface of the chuck body, the first marking is product information of the chuck mechanism, the product information has a readable form by sight, and at least one second marking is provided on the installation surface or the side surface of the chuck body, the second marking is information including at least the product information of the first marking, and the information of the second marking has a coded form.
    Type: Application
    Filed: February 7, 2019
    Publication date: February 18, 2021
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventors: Tamio NISHIMIYA, Kyoichi NAKAGAWA
  • Patent number: 10864579
    Abstract: Each jaw includes a master jaw with serrations and a top jaw, with serrations, to be fastened to a T-nut. The support groove includes a first keyway into which the key is fitted, whereas the top jaw includes a second keyway into which a tip of the key is fitted. A gap exists between the key and each of the first keyway and the second keyway. The key is inclined or twisted with respect to both the first keyway and the second keyway.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: December 15, 2020
    Assignee: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio Nishimiya
  • Publication number: 20200368825
    Abstract: The present disclosure improves the accuracy of matching the center of the workpiece with the rotation center of the chuck. It provides a chuck correction method for a chuck including a body, a plunger, and jaws, the body including a rear body and a front body provided in a front side of the rear body, the plunger provided inside the body and configured to move along an axis of the body, and the jaws each configured to move in a radial direction of the axis while guided by the front body along when the plunger moves, the chuck correction method including: a correction step including moving the front body in the radial direction of the axis with a position of the rear body keeping with respect to the axis in a state that a workpiece is clamped in the jaws.
    Type: Application
    Filed: June 15, 2018
    Publication date: November 26, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventor: Tamio NISHIMIYA
  • Patent number: 10835964
    Abstract: The disclosure provides a compact and low-cost gripper which allows an outside diameter of a piston to be increased. Provided is a gripper including a body case having, at one end, a cylinder part having a cylinder chamber which houses a piston so as to slide the piston along a central axis of the piston, and having, at the other end, a plurality of guide parts formed at regular intervals around the center axis and extending in a direction orthogonal to the center axis; a plurality of master jaws, on which top jaws can be removably mounted, guided by each of the guide parts; and a plunger having a plurality of interconnecting means which are respectively interconnected with each of the master jaws and slides along the central axis associated with a sliding operation of the piston.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: November 17, 2020
    Assignee: KITAGAWA IRON WORKS CO., LTD
    Inventors: Makoto Otsuka, Shuuji Fujii
  • Patent number: 10835965
    Abstract: A chuck mechanism of the present invention includes multiple master jaws placed movably in a radial direction on a front surface of a chuck body, and top jaws each detachably attached to front surfaces of the top jaws. Each master jaw and each top jaw have a raised portion and a recessed portion engageable with each other. Each of the raised and recessed portions has conical surfaces formed by part of a conical body. Each top jaw has a gripping surface formed by part of a circular columnar body. Upon work gripping, the center axes of the conical surfaces on a gripping side among the conical surfaces of each master jaw and each top jaw and the center axis of the gripping surface are all coincident with a rotation axis of the chuck body.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: November 17, 2020
    Assignee: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio Nishimiya
  • Publication number: 20200316692
    Abstract: An inner circumferential surface of a chuck body (2) has three fitting recesses (22) curved as viewed from a rotational axis (C1). An outward elastic deformation that occurs, through gripping of a work (W1) with top jaws (5), at portions of a plunger (3) which correspond to slide holes (31a) causes the portions deformed by the elastic deformation to slide on the respective recessed portions (22) so that the plunger (3) is moved to cause a symmetry axis (Y1) of the slide hole (31a) to coincide with a symmetry axis (Y2) of a guide groove (25) of the chuck body (2).
    Type: Application
    Filed: May 25, 2017
    Publication date: October 8, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio NISHIMIYA
  • Publication number: 20200215622
    Abstract: Each jaw includes a master jaw with serrations and a top jaw, with serrations, to be fastened to a T-nut. The support groove includes a first keyway into which the key is fitted, whereas the top jaw includes a second keyway into which a tip of the key is fitted. A gap exists between the key and each of the first keyway and the second keyway. The key is inclined or twisted with respect to both the first keyway and the second keyway.
    Type: Application
    Filed: February 8, 2018
    Publication date: July 9, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio NISHIMIYA
  • Patent number: 10688567
    Abstract: Provided is a retracting chuck that does not rattle even though a moving body can be operated axially, and that enables turning in which the grasp accuracy is increased and vibration and chatter are inhibited. The retracting chuck (100) is provided with: a body (1) comprising a rear body (2) disposed on the axial rear side and a moving body (3) disposed on the axial front side; a plunger (8) moving axially in the body (1); and a master jaw (6) which engages with the plunger (8) and which is caused by a wedge action to move in the radial direction by a slot (3a) formed in the moving body (3). The moving body (3) moves axially relative to the rear body (2). In the rear of body (2), a plate spring (11) is disposed in a bridging manner between seats (2a) provided at a distance from each other, and the plate spring (11) is fastened by a bolt (13) to each of the seats (2a). Between the seats (2a), the plate spring (11) is fastened by a bolt (16) to a seat (3b) of the moving body (3).
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: June 23, 2020
    Assignee: KITAGAWA IRON WORKS CO., LTD
    Inventor: Tamio Nishimiya
  • Publication number: 20200061720
    Abstract: A chuck mechanism of the present invention includes multiple master jaws placed movably in a radial direction on a front surface of a chuck body, and top jaws each detachably attached to front surfaces of the top jaws. Each master jaw and each top jaw have a raised portion and a recessed portion engageable with each other. Each of the raised and recessed portions has conical surfaces formed by part of a conical body. Each top jaw has a gripping surface formed by part of a circular columnar body. Upon work gripping, the center axes of the conical surfaces on a gripping side among the conical surfaces of each master jaw and each top jaw and the center axis of the gripping surface are all coincident with a rotation axis of the chuck body.
    Type: Application
    Filed: April 18, 2018
    Publication date: February 27, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio NISHIMIYA
  • Publication number: 20200023480
    Abstract: The disclosure provides a compact and low-cost gripper which allows an outside diameter of a piston to be increased. Provided is a gripper including a body case having, at one end, a cylinder part having a cylinder chamber which houses a piston so as to slide the piston along a central axis of the piston, and having, at the other end, a plurality of guide parts formed at regular intervals around the center axis and extending in a direction orthogonal to the center axis; a plurality of master jaws, on which top jaws can be removably mounted, guided by each of the guide parts; and a plunger having a plurality of interconnecting means which are respectively interconnected with each of the master jaws and slides along the central axis associated with a sliding operation of the piston.
    Type: Application
    Filed: October 5, 2017
    Publication date: January 23, 2020
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventors: Makoto OTSUKA, Shuuji FUJII
  • Publication number: 20190366448
    Abstract: A projecting part 11A and a recessed part 12A which engage with each other are formed on a master jaw 11 and a top jaw 12. In the master jaw 11, a movable pin 20 movable in an axial direction and a shaft 30 movable in a radial direction is disposed, and the movable pin 20 is engaged with the shaft so that the movable pin 20 can be moved in the axial direction. The top jaw 12 is provided with a pin hole 12c into which the movable pin 20 can be inserted. The movable pin 20 is locked, by rotating the shaft 30 by a predetermined amount, at a first position in which the movable pin 20 is inserted in the pin hole 12c or at the second position in which the movable pin 20 is extracted from the pin hole 12c.
    Type: Application
    Filed: April 3, 2018
    Publication date: December 5, 2019
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventor: Tomonari HIROMOTO
  • Publication number: 20190329327
    Abstract: The present invention provides an inexpensive chuck device that can achieve both a stable gripping operation and a high degree of accuracy in gripping and can also reduce limitations in the gripping of a workpiece. According to the present invention, a chuck device is provided, the chuck device being characterized by comprising a chuck main body and a master jaw, wherein the chuck main body has an oscillation supporting hole, and the oscillation supporting holes are rotatably provided in plurality around a rotational axis of the chuck main body, and wherein the master jaw has a top jaw detachably provided on one end thereof, and is fitted into the oscillation supporting hole while maintaining surface contact therewith to enable sliding contact.
    Type: Application
    Filed: November 24, 2017
    Publication date: October 31, 2019
    Applicant: KITAGAWA IRON WORKS CO., LTD
    Inventors: Naoyuki MASATSUGU, Toshihito NAKAMURA, Tamio NISHIMIYA, Youji YAMAGUCHI, Shuya ISHIKAWA, Yuichi HIRATA, Masanobu MIKAMI, Yujiro OKA
  • Publication number: 20190178771
    Abstract: A new method capable of evaluating wettability of a surface of a material is provided. The method includes the following: applying a gas jet to a surface of a material that is covered with a liquid so as to squeeze the liquid; imaging a surface of a liquid film formed on the surface of the material after squeezing the liquid; and evaluating wettability of the material based on the presence or absence of interference fringes on the surface of the liquid film.
    Type: Application
    Filed: August 18, 2017
    Publication date: June 13, 2019
    Applicants: Riken, Kitagawa Iron Works Co., Ltd.
    Inventors: Nobuyuki Tanaka, Yuki Nakanishi, Junko Takahara, Akane Awazu, Yo Tanaka, Yoshihide Haruzono, Hiromitsu Nasu
  • Publication number: 20120248804
    Abstract: A gripping method for a turbocharger housing used to process a turbocharger housing formed by casting, includes a scroll formed in a spiral shape from an axial center, and a large diameter hole and a small diameter hole provided along an axial direction of the scroll with space therebetween, such as to face each other. After positioning of the turbocharger housing is performed using an end surface of the large diameter hole facing the small diameter hole as a reference surface for positioning in the axial direction, an inner diameter of the large diameter hole is gripped.
    Type: Application
    Filed: June 18, 2012
    Publication date: October 4, 2012
    Applicant: Kitagawa Iron Works Co., Ltd.
    Inventors: Atsunori Monden, Kimihiro Kikkawa, Takumi Hayashi, Teruaki Takahashi, Yasuo Suzuki
  • Patent number: 8220805
    Abstract: [Problems] A gripping method for a turbocharger housing and a work gripping device that can accurately grip an inner diameter using a reference for shape during casting when processing. [Means for Solving Problems] In a gripping method of a turbocharger housing W, an end surface Y of a large diameter hole 22 facing a small diameter hole 25 is used for positioning in an axial direction. The inner diameter of the large diameter hole 22 is then gripped. A work gripping device 1 includes a cylindrical body 2, a plunger 3 that moves back and forth along an axial direction of the body 2, a jaw 4 that moves in a radial direction of the body 2 in tandem with the plunger 3, and a pusher 6 that presses the work W in a direction away from the body 2 in accompaniment with movement of the plunger 3. The jaw 4 includes a gripping surface 24 that grips the work W and a contact surface 5 that projects in an outward radial direction from an end edge of the gripping surface 24 away from the body 2.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: July 17, 2012
    Assignee: Kitagawa Iron Works Co., Ltd.
    Inventors: Atsunori Monden, Kimihiro Kikkawa, Takumi Hayashi, Teruaki Takahashi, Yasuo Suzuki
  • Patent number: 5901624
    Abstract: An apparatus for transferring workpieces to and from the chuck of a machine tool. A gripper arm is mounted to the machine frame for selectively axial and rotational movement on a shaft having helical and longitudinal threads on the surface thereof. A first nut is rotatably mounted to the machine frame for axial advancement of the shaft and a second nut is rotatably mounted for rotational advancement. The apparatus may also include a panel mounted to the machine frame between a transfer station and the chuck. An opening in the panel adjacent the transfer station has surfaces which mate with corresponding surfaces of the gripper arm so as to preclude the passage of debris to the transfer station. The apparatus may also include an apparatus for sequentially transferring a series of workpieces. The apparatus has a two gripper jaws and a compressible pusher plate therebetween which is compressed as it is moved towards an opening in an input chute so that a workpiece may roll between the jaws of the gripper.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: May 11, 1999
    Assignee: Kitagawa Iron Works Co., Ltd.
    Inventor: Yoshio Shiramasa
  • Patent number: 5848795
    Abstract: Even though the shape and size of an aluminum wheel to be chucked for machining is changed, it is possible to easily deal with this situation and to simply chuck the same. In a finger chuck which finger levers 5 are swingably mounted in the radius direction via fulcrum point parts 8 installed at adequately spaced positions in the circumferential direction of the outer circumference of a chuck body, the front end face part of the chuck body front part, which constitutes the front portion of said fulcrum point parts, is eliminated, a plurality of front end face parts 12 which are intended to be selectively replaced and mounted at said eliminated portion are formed integral with each other, and at this time said plurality of front end face parts are provided with a clamp seat 14 and a centering member 23 so that each of said front end face parts can be applied to specified kinds of different workpieces w.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: December 15, 1998
    Assignees: Kitagawa Iron Works Co., Ltd., Okuma Corporation
    Inventors: Naoyuki Masatsugu, Ikuhisa Fujii, Kazuhisa Miyaka
  • Patent number: D513013
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: December 20, 2005
    Assignee: Kitagawa Iron Works Co. Ltd.
    Inventors: Terumi Fujiki, Yoshihiro Kuroda, Hiroki Miyagaki
  • Patent number: D859481
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: September 10, 2019
    Assignee: KITAGAWA IRON WORKS CO., LTD.
    Inventor: Tamio Nishimiya