Patents Assigned to Chuo Hatsujo Kabushiki Kaisha
  • Patent number: 10809054
    Abstract: Provided is a shape measurement device that measures a shape of a spiral spring formed in a spiral shape. The shape measurement device is provided with an input means and a function calculation means. The input means inputs a captured photographic image depicting the spiral spring or measurement data produced by measuring the shape of the spiral spring. The function calculation means uses the input photographic image or measurement data to calculate at least an inter-coil space function representing the space between neighboring coils of the spiral spring, a pitch function representing the distance between coil cores of neighboring coils of the spiral spring, or a coil thickness function representing the thickness of coils of the spiral spring.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: October 20, 2020
    Assignee: Chuo Hatsujo Kabushiki Kaisha
    Inventor: Hideyo Takeuchi
  • Publication number: 20200088321
    Abstract: A cable supporting device can suppress a coil spring from protruding toward an inner circumferential side of a tubular portion of a main body, and can apply, to a nut member, a rotational force in a direction toward a stopper. The cable supporting device includes: a main body including a tubular portion in which a through hole is formed and on which an external thread is formed; a nut member; a stopper arranged on one side in the first direction with respect to the external thread and opposed to the nut member; and a coil spring applying, to the nut member, a rotational force in a direction approaching the stopper. An engagement portion that engages a first end portion of the coil spring is formed in the nut member, and an insertion groove is formed on the outer circumferential surface of the tubular portion.
    Type: Application
    Filed: September 18, 2019
    Publication date: March 19, 2020
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventor: Atsuhiko HATTORI
  • Patent number: 10022778
    Abstract: A method for forming a wire into a coil spring includes winding the wire around a coiling mandrel to form the wire into a cylindrical coil shape, clamping one end of the wire formed into the cylindrical coil shape, clamping an intermediate portion of the wire spaced from the clamped one end of the wire; and moving the clamped one end of the wire relative to the clamped intermediate position at least in an axis direction of the cylindrical coil shape, whereby a pigtail having a desired shape is formed.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: July 17, 2018
    Assignee: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Takashi Goto, Shinsuke Okura, Takashi Yamashita
  • Patent number: 9915284
    Abstract: A terminal supporting apparatus is provided with: a hub that is attached to an end of the outer cable and is provided with a flange on an outer periphery; a cushion member that is provided to surround the outer periphery of the hub and abuts on the flange at both a front surface and a back surface of the flange; and a housing that houses the cushion member. The cushion member includes a large-diameter portion that abuts on the flange. At least within a range contacting with the hub, at least a part of an outer peripheral surface of the large-diameter portion is fixed to an inner surface of the housing, while a clearance is formed between the cushion member and the inner surface of the housing over an entire region of an end surface of the large-diameter portion in a cable axis direction.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: March 13, 2018
    Assignee: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Masahiko Aoki, Kazuyoshi Nono, Takashi Goto, Yuichi Hirata
  • Publication number: 20170198745
    Abstract: A terminal supporting apparatus is provided with: a hub that is attached to an end of the outer cable and is provided with a flange on an outer periphery; a cushion member that is provided to surround the outer periphery of the hub and abuts on the flange at both a front surface and a back surface of the flange; and a housing that houses the cushion member. The cushion member includes a large-diameter portion that abuts on the flange. At least within a range contacting with the hub, at least a part of an outer peripheral surface of the large-diameter portion is fixed to an inner surface of the housing, while a clearance is formed between the cushion member and the inner surface of the housing over an entire region of an end surface of the large-diameter portion in a cable axis direction.
    Type: Application
    Filed: March 21, 2017
    Publication date: July 13, 2017
    Applicant: Chuo Hatsujo Kabushiki Kaisha
    Inventors: Masahiko Aoki, Kazuyoshi Nono, Takashi Goto, Yuichi Hirata
  • Publication number: 20170175216
    Abstract: A method of producing a spring which reduces time required for a heat treatment step of eliminating a machining strain generated by a forming step is provided. This production method is provided with a forming step (S10) of forming a spring steel material into a spring shape and a heat treatment step (S12) of eliminating a machining strain generated in the spring steel material by the forming step. The heat treatment step is executed by electrically heating the spring steel material by applying a current thereto. The heat treatment step has a first step of heating the spring steel material to a predetermined set temperature and a second step of keeping the spring steel material at the set temperature for a predetermined set time period subsequent to the first step. The set temperature is set to be higher than 430° C. but not higher than 500° C.
    Type: Application
    Filed: March 3, 2017
    Publication date: June 22, 2017
    Applicant: Chuo Hatsujo Kabushiki Kaisha
    Inventors: Yuichi Hirata, Hidekazu Suzuki, Hiroyuki Ogiso
  • Patent number: 9638238
    Abstract: A terminal supporting apparatus is provided with: a hub that is attached to an end of the outer cable and is provided with a flange on an outer periphery; a cushion member that is provided to surround the outer periphery of the hub and abuts on the flange at both a front surface and a back surface of the flange; and a housing that houses the cushion member. The cushion member includes a large-diameter portion that abuts on the flange. At least within a range contacting with the hub, at least a part of an outer peripheral surface of the large-diameter portion is fixed to an inner surface of the housing, while a clearance is formed between the cushion member and the inner surface of the housing over an entire region of an end surface of the large-diameter portion in a cable axis direction.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: May 2, 2017
    Assignee: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Masahiko Aoki, Kazuyoshi Nono, Takashi Goto, Yuichi Hirata
  • Patent number: 9623475
    Abstract: A method of producing a spring which reduces time required for a heat treatment step of eliminating a machining strain generated by a forming step is provided. This production method is provided with a forming step (S10) of forming a spring steel material into a spring shape and a heat treatment step (S12) of eliminating a machining strain generated in the spring steel material by the forming step. The heat treatment step is executed by electrically heating the spring steel material by applying a current thereto. The heat treatment step has a first step of heating the spring steel material to a predetermined set temperature and a second step of keeping the spring steel material at the set temperature for a predetermined set time period subsequent to the first step. The set temperature is set to be higher than 430° C. but not higher than 500° C.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: April 18, 2017
    Assignee: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Yuichi Hirata, Hidekazu Suzuki, Hiroyuki Ogiso
  • Patent number: 9453548
    Abstract: The present application provides a method for adjusting spring characteristics of a spring to desired spring characteristics. In the adjusting method of the present application, first, the spring is compressed until a “load-displacement” measurement line obtained by measuring the load applied to the spring and the displacement of the spring meets a “load-displacement” target line determined based on “load-displacement” characteristics of the spring and the desired spring characteristics (S10-S14). Next, the spring is expanded such that the load applied to the spring decreases along the “load-displacement” target line (S18).
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: September 27, 2016
    Assignee: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Shinsuke Okura, Shuji Kamiya, Yukimasa Kabeya, Junya Narukawa, Takashi Goto
  • Publication number: 20160208875
    Abstract: A spring, fatigue strength thereof is improved is provided. A spring 10 includes a steel layer 12 and a compound layer 14 provided on a surface of the steel layer and containing nitride. The compound layer 14 contains an ? phase, and a compressive residual stress of the ? phase is set to range from 800 to 1400 MPa.
    Type: Application
    Filed: September 2, 2014
    Publication date: July 21, 2016
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventor: Hidetoshi Yoshikawa
  • Publication number: 20160201749
    Abstract: The present application provides a method for adjusting spring characteristics of a spring to desired spring characteristics. In the adjusting method of the present application, first, the spring is compressed until a “load-displacement” measurement line obtained by measuring the load applied to the spring and the displacement of the spring meets a “load-displacement” target line determined based on “load-displacement” characteristics of the spring and the desired spring characteristics (S10-S14). Next, the spring is expanded such that the load applied to the spring decreases along the “load-displacement” target line (S18).
    Type: Application
    Filed: March 22, 2016
    Publication date: July 14, 2016
    Applicant: Chuo Hatsujo Kabushiki Kaisha
    Inventors: Shinsuke Okura, Shuji Kamiya, Yukimasa Kabeya, Junya Narukawa, Takashi Goto
  • Patent number: 9322447
    Abstract: The present application provides a method for adjusting spring characteristics of a spring to desired spring characteristics. In the adjusting method of the present application, first, the spring is compressed until a “load-displacement” measurement line obtained by measuring the load applied to the spring and the displacement of the spring meets a “load-displacement” target line determined based on “load-displacement” characteristics of the spring and the desired spring characteristics (S10-S14). Next, the spring is expanded such that the load applied to the spring decreases along the “load-displacement” target line (S18).
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: April 26, 2016
    Assignee: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Shinsuke Okura, Shuji Kamiya, Yukimasa Kabeya, Junya Narukawa, Takashi Goto
  • Patent number: 9068615
    Abstract: A spring has a Rockwell hardness of HRC 53 to HRC 56 and a dislocation density ? (cm?2) that satisfies the formula ??1.4×1011×H?6.7×1012 in the Rockwell hardness range of HRC 53 to HRC 56, in which H is the Rockwell hardness. The spring also has a prior austenite grain size number of 10 or higher.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: June 30, 2015
    Assignee: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Takanori Kuno, Masami Wakita
  • Patent number: 8936236
    Abstract: A manufacturing method of a coil spring for an automobile suspension includes forming a material into a coil shape; performing a heat treatment step on the material; performing a warm shot peening step on the material, and performing a hot setting step on the material. By performing the warm shot peening step prior to the hot setting step, a stronger compressive residual stress is imparted in a direction along which a large tensile stress acts during actual use of the coil spring, thereby improving sag resistance and durability of the coil spring. A coil spring is also manufactured according to this method.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: January 20, 2015
    Assignee: Chuo Hatsujo Kabushiki Kaisha
    Inventors: Tomohiro Nakano, Takayuki Sakakibara, Takanori Kuno, Shingo Mimura, Masami Wakita
  • Publication number: 20150014464
    Abstract: A storage device for a cable includes: a holder including a socket connected to a power source side; a reel attached to the holder so as to be attachable thereto and detachable therefrom and including a rotary drum to take up the cable; a socket provided on the reel and fitted with the socket of the holder when the reel is attached to the holder; and an elastically-deformable elastic member that is provided on at least one member of the holder and the reel and presses the socket of the one member to the side of the socket of the other member.
    Type: Application
    Filed: February 20, 2013
    Publication date: January 15, 2015
    Applicant: Chuo Hatsujo Kabushiki Kaisha
    Inventors: Hisashi Dohara, Eiji Mizuno, Kenji Iwami
  • Publication number: 20150007683
    Abstract: A terminal supporting apparatus is provided with: a hub that is attached to an end of the outer cable and is provided with a flange on an outer periphery; a cushion member that is provided to surround the outer periphery of the hub and abuts on the flange at both a front surface and a back surface of the flange; and a housing that houses the cushion member. The cushion member includes a large-diameter portion that abuts on the flange. At least within a range contacting with the hub, at least a part of an outer peripheral surface of the large-diameter portion is fixed to an inner surface of the housing, while a clearance is formed between the cushion member and the inner surface of the housing over an entire region of an end surface of the large-diameter portion in a cable axis direction.
    Type: Application
    Filed: October 22, 2012
    Publication date: January 8, 2015
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Masahiko Aoki, Kazuyoshi Nono, Takashi Goto, Yuichi Hirata
  • Publication number: 20140311849
    Abstract: A cable housing apparatus disclosed in the present specification can house a charging cable serving as standard equipment in a trunk room in an organized state without a troublesome task. This cable housing apparatus houses a charging cable having a charging connector provided in one end, a plug provided in the other end, and a CCID provided between the charging connector and the plug. The cable housing apparatus has a holder, and a reel detachably attached to the holder. The reel has an outer peripheral surface on which the charging cable is capable of being wound, and a holding part capable of holding the CCID.
    Type: Application
    Filed: October 26, 2012
    Publication date: October 23, 2014
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Kenji Iwami, Eiji Mizuno, Yuichi Hirata
  • Publication number: 20140274516
    Abstract: A housing device 10 includes a movable pulley unit 20 and a first weight 18. The movable pulley unit 20 is movable among a first position at which a long object is housed within a housing 12, a second position at which the long object is pulled out from the housing, and a third position which is set between the first position and the second position. Whereas the long object is pulled out from the housing when the movable pulley unit 20 moves upward, the long object is housed in the housing when the movable pulley unit moves downward. The first weight 18 is separated from the movable pulley unit when the movable pulley unit moves between the first position and the third position, and moves together with the movable pulley unit when the movable pulley unit moves between the third position and the second position.
    Type: Application
    Filed: August 6, 2012
    Publication date: September 18, 2014
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventor: Akehito Sugiura
  • Publication number: 20140246534
    Abstract: A housing device 10 includes a movable pulley unit 20 and a movable pulley holding mechanism. The movable pulley unit 20 is provided so as to be movable relative to the housing 12 in an up-down direction, and is movable among a first position at which a long object is housed within the housing, and a second position at which the long object is pulled out from the housing. Whereas the long object is pulled out from the housing when the movable pulley unit 20 moves upward, the long object is housed in the housing when the movable pulley unit moves downward. Between the first position and the second position, the movable pulley holding mechanism switches between a state where the movable pulley is movable downward and a state where the movable pulley is immovable downward.
    Type: Application
    Filed: August 6, 2012
    Publication date: September 4, 2014
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Akehito Sugiura, Masakazu Ichihara
  • Publication number: 20140224914
    Abstract: A housing device 10 includes a movable pulley 20, (first weights 18), and a guide mechanism. The movable pulley is movable among a first position at which the long object is housed within a housing 12, a second position at which the long object is pulled out from the housing, and a third position which is set between the first position and the second position. The long object is pulled out from the housing when the movable pulley 20 moves upward, and the long object is housed in the housing when the movable pulley moves downward. The first weights 18 are separated from the movable pulley when the movable pulley moves between the first position and the third position, and moves together with the movable pulley when the movable pulley moves between the third position and the second position.
    Type: Application
    Filed: August 6, 2012
    Publication date: August 14, 2014
    Applicant: CHUO HATSUJO KABUSHIKI KAISHA
    Inventors: Akehito Sugiura, Takashi Tomoto