Patents Assigned to Daido Kogyo Co., Ltd
  • Patent number: 10850925
    Abstract: A chain for a vacuum conveyor, includes a plurality of links each having a flat front surface for placing a conveyance object and a back surface facing to a suction portion. A plurality of adsorption holes each having a large opening area on the front surface and a small opening area on the back surface is formed in the link.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: December 1, 2020
    Assignee: DAIDO KOGYO CO., LTD.
    Inventors: Hayato Iguchi, Daigo Sawada
  • Patent number: 10794455
    Abstract: A tensioner includes a power spring, and a backup member being in contact with the power spring and supporting the power spring by acting an urging force in a direction opposite to a radial shift of the power spring in a direction in which the power spring is wound. The power spring is unwound in a condition in which an inter-plate frictional force of the power spring is small in a case where an urging force acting from a power spring to a tension member is greater than a load acting from the tensioner arm to the power spring and the power spring is wound in a condition in which the inter-plate frictional force of the power spring is large in a case where the urging force acting from the power spring to the tension member is smaller than the load acting from the tension member to the power spring.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: October 6, 2020
    Assignees: DAIDO KOGYO CO., LTD., NHK SPRING CO., LTD.
    Inventors: Hideaki Seki, Yoshio Yamada, Takao Kobayashi, Kazuhito Hiraoka, Shuji Takahashi
  • Patent number: 10443686
    Abstract: A chain includes a plurality of inner links and a plurality of outer links. Each of the inner links includes a pair of inner plates each having a bush hole and a bush. The bush includes both end portions which are press-fitted into bush holes of the pair of the inner plates. Each of the outer links includes a pair of outer plates and a pin. A diametric dimension in a pitch direction of an inner diametric surface of the bush is constant along an entire axial length of the bush. A diametric dimension in a height direction of the inner diametric surface at each of the both end portions of the bush is smaller than a diametric dimension in the height direction of the inner diametric surface at an intermediate part of the bush located between the pair of inner plates.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: October 15, 2019
    Assignee: DAIDO KOGYO CO., LTD.
    Inventors: Motoki Tanaka, Yurie Koami, Hiroki Nakagawa, Yuma Osaka
  • Patent number: 9352710
    Abstract: An anti-collision component consisting of a metal hollow profile for automobiles includes a collision side flange, a body side flange, and a web connected to the flanges. The hollow profile has a longitudinal end at which a cross-sectional configuration is deformed by swaging to reduce a dimension between the flanges. The following relations are established: tW>TW RCI?(tW?TW) where tW is a wall thickness of the web at the end, TW is a wall thickness of the web at a portion where the cross-sectional configuration is not deformed, and RCI is an inside corner radius of a corner formed of the web and each flange at the portion.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: May 31, 2016
    Assignees: Kobe Steel, Ltd., DAIDO KOGYO CO., LTD.
    Inventors: Hideki Ishitobi, Narikazu Hashimoto, Tsunetake Tsuyoshi, Shingo Shimoaka, Tomomichi Ohtani, Kenji Nakaya, Kei Chino
  • Patent number: 9353829
    Abstract: At least one member composing a chain bearing, such as a pin, includes a surface layer composed of vanadium carbonitride (VCN) coating on a surface of a base material of the at least one member. An oxide (VO) film having a predetermined thickness is also formed on a surface of the surface layer such that the oxide film is interposed between the surface layer and another member, such as a pin hole, composing the chain bearing.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: May 31, 2016
    Assignee: DAIDO KOGYO CO., LTD.
    Inventors: Masashi Nishikawa, Yoshio Okumura, Yuma Ohsaka, Motoki Tanaka
  • Publication number: 20160114747
    Abstract: An anti-collision component consisting of a metal hollow profile for automobiles includes a collision side flange, a body side flange, and a web connected to the flanges. The hollow profile has a longitudinal end at which a cross-sectional configuration is deformed by swaging to reduce a dimension between the flanges. The following relations are established: tW>TW RCI?(tW-TW) where tW is a wall thickness of the web at the end, TW is a wall thickness of the web at a portion where the cross-sectional configuration is not deformed, and RCI is an inside corner radius of a corner formed of the web and each flange at the portion.
    Type: Application
    Filed: October 20, 2015
    Publication date: April 28, 2016
    Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), DAIDO KOGYO CO., LTD.
    Inventors: Hideki Ishitobi, Narikazu Hashimoto, Tsunetake Tsuyoshi, Shingo Shimoaka, Tomomichi Ohtani, Kenji Nakaya, Kei Chino
  • Patent number: 9290042
    Abstract: A spoke receiving hole extends through a flange formed on a rim so as to incline by a predetermined angle in a radial direction with respect to a line perpendicular to a wheel center plane. A head of a spoke seats on a seating surface provided on one side surface of the spoke receiving hole in contact at a region I on the side closer to a rim body, and a head straight portion of the spoke contacts with an edge portion K of an opening on the side distant from the rim body to which a hole portion directly opens on the side opposite from the seating surface of the spoke receiving hole.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: March 22, 2016
    Assignee: DAIDO KOGYO CO., LTD.
    Inventor: Tomo Miyamoto
  • Patent number: 9222545
    Abstract: A back face of each inner link plate of the chain is curved convexly. Heights from a pitch line connecting centers of pin holes of inner and guide link plates to the convex apex portion of the inner link plate and to an apex portion of the guide link plate are equalized. The convex apex portions are brought into contact with a guide face of the chain guide per every pitch and the ear apex portions are brought into contact with the chain guide per every pitch while being shifted by a half pitch from the convex apex portions.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: December 29, 2015
    Assignee: DAIDO KOGYO CO., LTD.
    Inventors: Motoki Tanaka, Hiroaki Oku
  • Patent number: 8932164
    Abstract: There is provided a wear-resistant chain having a high durability even in severe use environments such as those of a timing chain of an engine even though it is highly efficient and productive. A miniaturizing agent containing silicon is doped in a vanadium cementation process of a base material of steel. Vanadium carbide forming a surface-hardened layer contains a secondary phase composed of an amorphous structure containing silicon within crystal grains and a crystal grain size of the vanadium carbide is miniaturized to 1 ?m or less.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: January 13, 2015
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Yoshio Okumura, Mitsuru Yasuta, Yukihiro Kishi
  • Patent number: 8888632
    Abstract: A silent chain using double-sided driving link plates having symmetrical upper and lower teeth has a problem that it is unable to assure a required risky sectional area of the plates because a width between upper and lower crotches is narrow. The invention provides a silent chain using double-sided driving link plates whose required risky sectional area is maintained by using link plate whose back side is undercut and whose upper and lower parts are unsymmetrical even though its front side has a shape of a normal link plate. A distance from a line connecting centers of pin holes to a bottom of an upper-side crotch is equal to or more than ½ of a diameter of the pin hole to assure the risky sectional area. Teeth of the back side are cut away to form a flat surface to assure a contact area with a shoe and others.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: November 18, 2014
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Mitsuru Yasuta, Yukihiro Kishi, Nobuyuki Matsui
  • Patent number: 8783006
    Abstract: A chain includes a plurality of sliding members that moves relative to each other. At least one of sliding members is formed of a martensitic stainless steel, and contains, in a superficial layer thereof, elemental substances of carbon and nitrogen at a range from 0.17 to 0.50 mass % in total, while a precipitation amount of carbide and nitride is 0.05 mass % or less in total.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: July 22, 2014
    Assignee: Daido Kogyo Co., Ltd.
    Inventor: Jun Baba
  • Publication number: 20140141912
    Abstract: A chain includes a plurality of sliding members that moves relative to each other. At least one of sliding members is formed of a martensitic stainless steel, and contains, in a superficial layer thereof, elemental substances of carbon and nitrogen at a range from 0.17 to 0.50 mass % in total, while a precipitation amount of carbide and nitride is 0.05 mass % or less in total.
    Type: Application
    Filed: November 13, 2013
    Publication date: May 22, 2014
    Applicant: Daido Kogyo Co., Ltd.
    Inventor: Jun BABA
  • Publication number: 20140141914
    Abstract: A back face of each inner link plate of the chain is curved convexly. Heights from a pitch line connecting centers of pin holes of inner and guide link plates to the convex apex portion of the inner link plate and to an apex portion of the guide link plate are equalized. The convex apex portions are brought into contact with a guide face of the chain guide per every pitch and the ear apex portions are brought into contact with the chain guide per every pitch while being shifted by a half pitch from the convex apex portions.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 22, 2014
    Applicant: Daido Kogyo Co., Ltd.
    Inventors: Motoki TANAKA, Hiroaki OKU
  • Patent number: 8678519
    Abstract: Large impacts act on a spoke wheel and spokes fastened by nipples tend to be loosened when a racing off-road motorcycle and the like repeatedly jumps and lands. A hub is connected with a rim by using deformed spokes each having a deformed portion. The deformed spoke is fastened while being elastically deformed so that the deformed portion extends by the nipple. As compared to a straight spoke, the deformed spoke has low longitudinal elastic modulus and substantially the same stiffness with a spoke having an equal diameter.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: March 25, 2014
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Toshihiro Yamamoto, Akiyoshi Komeya
  • Patent number: 8578829
    Abstract: There is provided a punching unit capable of punching holes in high-performance by increasing a punching force and by rotating a punch. A guide hole that guides the punch in the vertical direction is formed to have a narrow upper part, a wider lower part and inclined surfaces between them. An actuation pin engages with a cam and the punch moves up and down to punch a hole when a cam member reciprocates. The actuation pin abuts with the inclined surface of the guide hole at the punching position, so that the punch is rotated and a cam inclined angle is reduced by an inclined angle of the guide hole, allowing a large punching force.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: November 12, 2013
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Toshiyuki Majima, Kazuo Nishimura
  • Patent number: 8257212
    Abstract: A chain tensioner has a plunger (14) slidably fitted in a bottomed cylinder (12) formed in a housing (11), and configured to resiliently urge the plunger (14) by a return spring (13) in the direction along which the plunger (14) is projected out from the cylinder (12), wherein the chain tensioner is configured to attach an engagement clip (19) to the opening of the cylinder (12), and to provide an engagement portion engageable with the engagement clip (19) to the end of the plunger (14) on the projection side thereof, so as to allow the engagement clip (19) and the engagement portion to engage with and disengage from each other corresponding to the position of rotation of the plunger (14).
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: September 4, 2012
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Toshimitsu Yoshimura, Hitoshi Hamano, Yoshio Kurokawa, Hideaki Seki
  • Patent number: 8197370
    Abstract: A chain tensioner (1) having a plunger (12) slidably assembled in a cylinder portion (13) together with a return spring (11), the chain tensioner (1) further has a stopper plate (22) having a through-hole (22a) formed therein, through which the plunger (12) is inserted; and a biasing member (24) disabling movement of the plunger (12), by applying a biasing force to the end of the stopper plate (22) so as to incline the stopper plate (22), the chain tensioner is configured to apply a hydraulic pressure of a hydraulic oil of an engine to the stopper plate (22), so as to reduce the inclination of the stopper plate (22) against the biasing force applied by the biasing member (24), to thereby allow movement of the plunger (12).
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: June 12, 2012
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Takehiko Hirose, Hitoshi Hamano, Toshimitsu Yoshimura
  • Patent number: 8146340
    Abstract: A bush is pressed into a link plate in a turning link rank that turns relatively with a pin. The bush is molded into a seamless cylindrical shape by cold-forging and is coated with a metal carbide layer formed by cementation of chrome, vanadium and other metals and having Vickers hardness of 1300 Hv or more similarly to the pin. Afterwards, the bush is treated by a quenching, tempering or isothermal transformation process. Thereby, wear resistance of the pins and the link plates of a silent (link) chain is improved, productivity is improved and associated costs are reduced.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: April 3, 2012
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Yoshihiro Shimada, Nobuyuki Matsui
  • Patent number: 8146472
    Abstract: A paper cutting device, for cutting multiple sheets of paper stacked in layers on a table, comprises a paper retainer (2) descending from an upper side along a guide and a cutter (3) diagonally ascending from the lower side. A receiving part (18) is mounted on the lower surface of a paper retaining frame (20). The receiving part (18) is formed by joining a base plate (36) with a large elastic modulus such as a metal to a resin receiving plate (37). A slip prevention structure is installed on the junction surfaces of the base plate (36) and the receiving plate (37) to suppress the extension/retraction of the receiving part of the paper retainer so as to prevent wrinkles from occurring in the paper near a blade receiving surface when the paper is cut off.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: April 3, 2012
    Assignee: Daido Kogyo Co., Ltd.
    Inventors: Kazuo Nishimura, Toshiyuki Majima
  • Patent number: 8011497
    Abstract: A greasing through hole is perforated through one outer link plate, and greasing device is attached to the through hole. Degreasing through-holes are perforated through an outer link plate or an inner link plate on the side distant from the outer link plate with a bearing section A between the link plates, and degreasing device 22 is attached to those through-holes. Lubricant injected from the greasing device is supplied to the bearing section A through a gap c between the sealing device and the outer link plate, and used lubricant within the bearing section A is discharged out of the degreasing device through another gap c.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: September 6, 2011
    Assignee: Daido Kogyo Co., Ltd.
    Inventor: Takuma Ono