Patents by Inventor Tomonori Nagata

Tomonori Nagata 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: 20070290496
    Abstract: An amount of webbing that is pulled-out after operation of a pretensioner mechanism is reduced. In a webbing retractor 10, a lock pawl 78 is set in a non-meshable state in which it cannot mesh with a lock gear 26. At a time when a pretensioner mechanism 34 operates and a clutch plate 42 rotates in a take-up direction, a lock stopper 86 rotates together with the clutch plate 42 and releases engagement with the lock pawl 78. Therefore, the lock pawl 78 is rotated by a compression coil spring 70 and changed to a meshable state. In this way, immediately after rotational force in a pull-out direction is applied to the lock gear 26 due to load from a vehicle occupant after operation of the pretensioner mechanism 34, the lock pawl 78 meshes with the lock gear 26, and pulling-out of a webbing 20 is impeded. Therefore, an amount of the webbing 20 which is pulled-out can be reduced.
    Type: Application
    Filed: March 2, 2005
    Publication date: December 20, 2007
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Hitoshi Takamatsu, Tomonori Nagata, Kazuhiko Aihara, Masaki Yasuda, Toshio Nakashima
  • Publication number: 20070278338
    Abstract: A webbing take-up device (10, 100) is disclosed, wherein a motor (44) is provided directly below a take-up shaft (20) between a pair of leg plates (16, 18) with a rotary shaft (50) of the motor (44) disposed perpendicularly to the take-up shaft (20), and a clutch (26) is provided at one side of one leg plate (16). Further, a gear (76) of a motor gear portion (46) is removably connected to a worm gear (34) in a clutch gear portion (28), and a mounting stay (84) is detachably attached to a case (30) with screws (86), so that the motor (44) and the motor gear portion (46) can be detached independently of the case (30) while still being assembled together. Still further, a pretensioner mechanism (156) and a sensor mechanism (182) are provided at one end side of a spool (118), and an urging mechanism (136) is disposed at the other end side thereof.
    Type: Application
    Filed: March 7, 2005
    Publication date: December 6, 2007
    Applicant: KABUSHIKI KAISHA TOKAI-RIKE-DENKI-SEISAKUSHO
    Inventors: Takuhiro Saito, Katsuki Asagiri, Shuichi Harada, Shinji Mori, Fuminori Komiya, Tomonori Kimura, Hitoshi Takamatsu, Tomonori Nagata, Kazuhiko Aihara, Masaki Yasuda
  • Patent number: 7290730
    Abstract: A pinion of a pretensioner is provided at a side of a torsion shaft, which side is opposite a side connected integrally to a spool via a sleeve. A base lock of a lock mechanism is connected to the pinion. Due to the lock mechanism operating, a leg plate side end portion of the torsion shaft is locked. In this way, due to operation of the pretensioner, the pinion, which is connected to a rotating portion of a sleeve, also is locked by the locking mechanism. Therefore, a piston of the pretensioner is not lowered, and internal pressure of a cylinder does not affect deformation of the torsion shaft.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: November 6, 2007
    Assignees: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho, Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomonori Nagata, Toshimasa Yamamoto, Hitoshi Takamatsu, Yasuho Kitazawa, Takeaki Kato, Makoto Sekizuka, Shigekazu Imanaka, Kiyoka Matsubayashi, Takuya Nezaki
  • Publication number: 20070145174
    Abstract: This webbing retractor has a multi-function gear made as rock gear 70. Pretensioner mechanism 50 has sleeve 72 and sleeve extension 73. Sleeve 72 and sleeve extension 73 are integrally structured at an axial center of rock gear 70, a member of rock mechanism 130. Rock mechanism 130 has rock gear main body 74 and ratchet teeth 76.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 28, 2007
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Hitoshi Takamatsu, Tomonori Nagata, Yasuho Kitazawa
  • Publication number: 20060208475
    Abstract: In a pretensioner device, engaging teeth of a pinion (rotating body) have first projections which project-out toward the other side in the peripheral direction of a cam portion. Meshing claws of a clutch plate have second projections which project-out toward a one side in the peripheral direction of the cam portion, and whose gear portion side end surfaces face the first projections. In a state before operation of the pretensioner device, movement of the clutch plate toward one side in the axial direction with respect to the pinion is restricted due to the second projections engaging with the first projections. Accordingly, in the pretensioner device, in the state before operation, even if some type of external force is applied to the clutch plate, positional offset of the clutch plate toward the one side in the axial direction with respect to the pinion can be prevented.
    Type: Application
    Filed: May 23, 2006
    Publication date: September 21, 2006
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Yasuho Kitazawa, Hitoshi Takamatsu, Masaki Yasuda, Kazuhiko Aihara, Toshio Nakashima, Tomonori Nagata
  • Publication number: 20060186252
    Abstract: A webbing take-up device comprising: a take-up shaft that takes up a webbing belt; a metal frame that axially supports the take-up shaft; and a lock mechanism comprising a lock plate that blocks rotation in the pullout direction of the webbing of the take-up shaft by engaging the take-up shaft directly or indirectly. The lock plate is formed by performing press-punch and press-bend processing on a metal plate and has a connecting portion formed so that one end side thereof is continuous with a lock, which engages the take-up shaft. The connecting portion spans between one side and the other side of the frame.
    Type: Application
    Filed: February 21, 2006
    Publication date: August 24, 2006
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Yasuho Kitazawa, Hitoshi Takamatsu, Masaki Yasuda, Kazuhiko Aihara, Toshio Nakashima, Tomonori Nagata
  • Publication number: 20060186251
    Abstract: A lock plate (46) chatter preventing structure which, under a predetermined condition, directly or indirectly engages with a take-up shaft that takes up a passenger-restraining webbing belt to deter the rotation of the take-up shaft in a webbing belt pullout direction. The lock plate chatter preventing structure includes: a support member that rotatably supports the lock plate (46); and an urging portion (128) formed continuously from the support member. The urging portion includes a leading end (128B) that pressingly contacts one axial-direction end portion (116) of the lock plate and urges the lock plate toward the other axial-direction end.
    Type: Application
    Filed: February 15, 2006
    Publication date: August 24, 2006
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Yasuho Kitazawa, Hitoshi Takamatsu, Masaki Yasuda, Kazuhiko Aihara, Toshio Nakashima, Tomonori Nagata
  • Publication number: 20060186249
    Abstract: A holding structure for holding a member to be held that is provided in a holding element by the holding element. The holding structure comprises a holding pawl which is provided in the holding element, having a basal part positioned on the lateral side of the member to be held as well as a pawl part provided in the tip part of the basal part, and with which the pawl part engages with the member to be held, thereby holding the member to be held; and restriction means which, when the basal part is deformed in a direction in which it separates from the member to be held, engages with the holding pawl for restricting the deformation of the basal part.
    Type: Application
    Filed: January 31, 2006
    Publication date: August 24, 2006
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Yasuho Kitazawa, Hitoshi Takamatsu, Masaki Yasuda, Kazuhiko Aihara, Toshio Nakashima, Tomonori Nagata
  • Publication number: 20060169821
    Abstract: A fixture is disclosed which can reliably attach an attachment member, such as a cylinder, to an attachment site, such as a frame. The fixture includes a fixing portion, which faces the attachment site at the side of the attachment site and is fixed to the attachment site, and a contact portion, which is disposed at the side opposite from the attachment site, with the attachment member therebetween. The contact portion is integrally coupled to the fixing portion, point-contacts or line-contacts the attachment member, and is configured to push the attachment member to the attachment site in a state where the fixing portion is fixed to the attachment site. A webbing take-up device including this fixture is also disclosed.
    Type: Application
    Filed: January 24, 2006
    Publication date: August 3, 2006
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Yasuho Kitazawa, Hitoshi Takamatsu, Masaki Yasuda, Kazuhiko Aihara, Toshio Nakashima, Tomonori Nagata
  • Publication number: 20060163411
    Abstract: A webbing take-up device is disclosed which includes a take-up shaft onto which a webbing is mound, and a mounting member nondetachably mounted to the take-up shaft by screw tightening. The take-up shaft and the mounting member are engaged with each other at a portion other than a portion where the screw tightening is carried out, thereby preventing relative rotation of the take-up shaft and the mounting member.
    Type: Application
    Filed: April 4, 2005
    Publication date: July 27, 2006
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Hitoshi Takamatsu, Tomonori Nagata, Kazuhiko Aihara, Masaki Yasuda
  • Publication number: 20060144983
    Abstract: A webbing retractor which can prevent gas, which is for rotating a take-up shaft in a take-up direction, from affecting other structural parts. In the webbing retractor, when a pretensioner mechanism operates, gas for operation within a cylinder is exhausted toward a pinion via a gas venting hole formed in a flange portion of a piston. Because a blocking wall is provided between the pinion and an acceleration sensor, exhausted gas passes between the pinion and the blocking wall, and is exhausted to an outer side of the webbing retractor from an upper end side of a cover plate or the like. In this way, blowing-out of the exhausted gas onto the acceleration sensor is blocked, and the exhausted gas can be prevented from affecting the acceleration sensor.
    Type: Application
    Filed: January 3, 2006
    Publication date: July 6, 2006
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Yasuho Kitazawa, Tomonori Nagata, Hitoshi Takamatsu, Masaki Yasuda, Toshio Nakashima, Kazuhiko Aihara
  • Publication number: 20050211816
    Abstract: A moving member that causes a take-up shaft to rotate is prevented from passing through a limit position. In a webbing take-up device, a piston rises when a vehicle disposed with the webbing-take device experiences an emergency situation, whereby a pinion, a clutch plate, a lock gear, a torsion shaft and a spool are rotated, and a webbing is taken up. Thus, a flange of the piston abuts against a piston stopper fixed to a frame, and the rising energy of the piston is absorbed. Moreover, an upper end of the piston abuts against an inhibitor portion of a cover plate disposed at a limit position, and the rising of the piston is inhibited. Thus, the upper end of the piston causing the pinion to rotate can be reliably prevented from passing through the limit position.
    Type: Application
    Filed: March 17, 2005
    Publication date: September 29, 2005
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Hitoshi Takamatsu, Tomonori Nagata, Masaki Yasuda, Toshimasa Yamamoto, Kazuhiko Aihara
  • Patent number: 6883742
    Abstract: A webbing retractor includes a take-up shaft, an inertia plate provided integrally and coaxially with the take-up shaft, and an inertial force imparting mechanism. When a webbing for restraining a vehicle occupant is suddenly pulled-out, the take-up shaft takes-up the webbing, and the inertia plate causes a rotational delay with respect to the take-up shaft, and rotation of the take-up shaft in a webbing pull-out direction is thereby locked. Further, the inertial force imparting mechanism that suppresses and deters rotation of the inertia plate in a webbing take-up rotation direction by the inertial force imparting mechanism applying inertial force in a webbing pull-out rotation direction to the inertia plate which attempts to rotate in a webbing take-up direction even after rotation of the take-up shaft in the webbing take-up rotation direction has stopped when a vehicle occupant cancels an applied state of the webbing and the entire webbing is taken-up.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: April 26, 2005
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Akira Sumiyashiki, Tomonori Nagata
  • Patent number: 6834821
    Abstract: A webbing retractor is provided. When assembled, due to a positional relationship which is such that insert-in portions are formed between a tubular portion of a lock base and a spool shaft, grooves are formed at the tubular portion and a portion of the spool shaft. An elastically deformable terminal end portion is formed at a stopper which is press-fit into an insert-in hole. In a state in which the stopper also is installed, not only press-in load in a thrusting direction, but also press-in load in a radial direction is applied between the lock base and a spool such that a structure is fixed.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: December 28, 2004
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Tomonori Nagata, Kazuhiko Aihara, Katsuki Asagiri, Yasuho Kitazawa
  • Publication number: 20040227030
    Abstract: A pinion of a pretensioner is provided at a side of a torsion shaft, which side is opposite a side connected integrally to a spool via a sleeve. A base lock of a lock mechanism is connected to the pinion. Due to the lock mechanism operating, a leg plate side end portion of the torsion shaft is locked. In this way, due to operation of the pretensioner, the pinion, which is connected to a rotating portion of a sleeve, also is locked by the locking mechanism. Therefore, a piston of the pretensioner is not lowered, and internal pressure of a cylinder does not affect deformation of the torsion shaft.
    Type: Application
    Filed: May 14, 2004
    Publication date: November 18, 2004
    Applicant: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventors: Tomonori Nagata, Toshimasa Yamamoto, Hitoshi Takamatsu, Yasuho Kitazawa, Takeaki Kato, Makoto Sekizuka, Shigekazu Imanaka, Kiyoka Matsubayashi, Takuya Nezaki
  • Publication number: 20040079827
    Abstract: A webbing retractor includes a take-up shaft, an inertia plate provided integrally and coaxially with the take-up shaft, and an inertial force imparting mechanism. When a webbing for restraining a vehicle occupant is suddenly pulled-out, the take-up shaft takes-up the webbing, and the inertia plate causes a rotational delay with respect to the take-up shaft, and rotation of the take-up shaft in a webbing pull-out direction is thereby locked. Further, the inertial force imparting mechanism that suppresses and deters rotation of the inertia plate in a webbing take-up rotation direction by the inertial force imparting mechanism applying inertial force in a webbing pull-out rotation direction to the inertia plate which attempts to rotate in a webbing take-up direction even after rotation of the take-up shaft in the webbing take-up rotation direction has stopped when a vehicle occupant cancels an applied state of the webbing and the entire webbing is taken-up.
    Type: Application
    Filed: August 8, 2003
    Publication date: April 29, 2004
    Applicant: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Akira Sumiyashiki, Tomonori Nagata
  • Patent number: 6698678
    Abstract: In a webbing retractor, a wire is inserted through a through-hole of a spool on which a webbing is taken-up and from which the webbing is pulled-out. At an initial stage of a process of absorbing inertial energy of a vehicle occupant, a large force limiter load is generated by adding a rubbing force of the wire at a peripheral portion of the through-hole, to a twisting load of a torsion bar. An energy absorption amount is made large, and an amount of pulling-out of the webbing is kept low. After a predetermined amount of energy has been absorbed, when the wire is completely pulled-out from the through-hole, the rubbing force of the wire is cancelled, the force limiter load is reduced, and force applied to the vehicle occupant via the webbing is reduced.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: March 2, 2004
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Seiji Hori, Tomonori Nagata
  • Patent number: 6676058
    Abstract: A webbing retractor is provided. A wire for increasing force limiter load spans between a spool and a lock base. A concave groove is formed in one end portion of the wire. A push nut of a lock plate cover engages with the concave groove and the wire is fixed. One engagement piece of the push nut is longer than other engagement pieces so as to push the one end portion of the wire toward the other engagement pieces.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: January 13, 2004
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Tomonori Nagata, Katsuki Asagiri, Yasuho Kitazawa, Kazuhiko Aihara, Kenji Gotou
  • Patent number: 6669132
    Abstract: Shear ribs are formed at a bottom portion of a fitting hole of a spool for positioning a lock base, and respective end portions of the positioning portion abuts on a shear rib. Further, ribs are formed between the shear ribs. When the spool rotates in an unwinding direction with respect to the lock base, the end portion of the positioning portion deforms and breaks a shear rib, a rib and then another shear rib in that order. By being able to combine the effects of energy absorption due to deformation of the ribs with that of energy absorption due to twisting deformation of the torsion bar, a force limiter load immediately increases as soon as the spool starts to rotate.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: December 30, 2003
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Tomonori Nagata, Shinji Mori, Yasuho Kitazawa
  • Patent number: 6626388
    Abstract: In a webbing retractor having a pretensioner mechanism and a force limiter mechanism, when a drive member is rotated in one direction by the pretensioner mechanism, a cam plate is disposed at a sleeve side by an inner peripheral surface of a clutch ring. Thus, a roller engages with a sleeve, the sleeve is rotated integrally with the drive member, and a webbing is taken-up. When the sleeve is rotated in another direction by the force limiter mechanism, the cam plate is inserted into a recess portion of the clutch ring, and the cam plate is disposed at a side opposite to a sleeve side. Thus, rotation of the sleeve with respect to the drive member is permitted, and impeding of the pulling-out of the webbing can be prevented. Accordingly, a force limiter load can be determined by only a load required for deforming an energy absorbing member.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: September 30, 2003
    Assignee: Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
    Inventors: Tomonori Nagata, Shinji Mori