Kabushiki Kaisha Tokai Rika Denki Seisakusho

Toyota Jidosha Kabushiki Kaisha

Tomonori Nagata

Seiji Hori

Yasuho Kitazawa

Kazuhiko Aihara

Katsuki Asagiri

Hitoshi Takamatsu

Shinji Mori

Masaki Yasuda

Akira Sumiyashiki

Toshio Nakashima

Keiichi Kato

Keisuke Imai

Masaru Ukita

Shinichi Okubo

Seiji Nishide

Tatsuo Yamashita

Yusuke Hirokawa

Hiroaki Yamazoe

Toshimasa Yamamoto

Wataru Yanagawa

Makoto Sekizuka

Takuhiro Saito

Takuya Nezaki

Motoki Sugiyama

Kiyoka Matsubayashi

Fuminori Komiya

Yasutaka Watanabe

Tetsushi Muromachi

Toshio Saito

Takeaki Kato

Shigekazu Imanaka

Keiichi Katoh

Yoshio Umezawa

Tomohiro Okuhira

Tomonori Kimura

Yasunori Murayama

Kenji Gotou

Naoki Urakawa

Shuichi Harada

Hiroaki Yamazohe

When disassembling after a gas being supplied into a tube member, the gas in the tube member is discharged before the tube member and a moving member become separable. In a webbing take-up device, a cover plate cannot be removed from a frame and thereafter a cylinder and a piston inside the cylinder cannot be separated before covering of a fixing screw with a covering section of a plate being released by removing a screw from an exhaust port of the cylinder and by removing the plate from the cylinder. Thus, after a high-pressure gas being supplied into the cylinder, the high-pressure gas inside the cylinder can surely be discharged by removing the plate from the cylinder and the exhaust port is opened by the screw before the cylinder and the piston being separated.

Webbing take-up device

A pretensioner comprising a gas generating unit; a pretensioner body to whose inside the gas is supplied; a spool driving member disposed inside the pretensioner body and causing a spool to rotate to retract webbing onto the spool; a gas flow rate adjusting portion disposed in the spool driving member and whose inner peripheral shape is set in accordance with a flow rate of the gas to be passed through the gas flow rate adjusting portion; and a filter unit having a vent portion that is communicated with a space between the gas generating unit and the spool driving member and is also communicated with the gas flow rate adjusting portion. The open shape of the gas flow rate adjusting portion has a portion that does not coincide in a plan view with the open shape of the vent portion, and the overall open area of the vent portion is set larger than the open area of the gas flow rate adjusting portion.

Pretensioner

A webbing take-up device that can regulate displacement of a held part such as clutch while suppressing or preventing a drop in the assembility of the held part such as clutch. A projection is formed on a bridge portion in a wall portion on the opposite side of a holding portion side. When a cover plate is attached to a frame, a base portion of the cover plate contacts a distal end of the wall portion, but at the portion where the projection is formed, the based portion presses the projection and bends the bridge portion. By the bridge portion bending, a touching surface of the holding portion contacts a base portion of a clutch plate and regulates displacement of the clutch plate. Moreover, in a state where the bridge portion is not bending, a clearance is formed between the touching surface and the base portion when the clutch plate is disposed, so the clutch plate can be also be easily attached.

A pretensioner mechanism comprising webbing capable of restraining a vehicle occupant; a cylinder member into which gas is supplied when specific conditions occur; a movement member provided so as to be capable of moving inside the cylinder member, the movement member being formed with a communication hole that communicates a first side and a second side of the movement member; a closure member that is inserted into the communication hole and substantially closes off the communication hole to such an extent that pressure from the gas supplied into the cylinder member causes the movement member to move towards the first side and the restraining force of the webbing on the occupant is increased; and a communication groove formed between the communication hole and the closure member to communicate a first side of the closure member with a second side of the closure member.

Pretensioner mechanism

Provided is a webbing winding device capable of mounting a holding member for holding a pretensioner on a frame easily. The webbing winding device has a holder which is mounted on a leg plate only by applying loads to tip ends (upper ends) of load receiving pieces and pushing the tip end (bent portion) sides of engagement claws into hole portions. With this structure, the operation of mounting the holder on the leg plate is easy and does not need any component such as screw. As no fastening component such as screw for mounting the holder on the leg plate is required, the cost for components is reduced and as no fastening step of screw is required, such cost is also reduced.

Webbing winding device

In the present pretensioner, press contact portions are formed further to a side of an open end of a packing housing section than central portions of opposing faces along a depth direction of the packing housing section. Accordingly, when a packing is being fitted into the packing housing section, no great resistance is imparted to a curved face side of the packing from a press contact wall of a housing section body and the opposing face, and the packing is fitted comparatively smoothly therein. Consequently, even when fitting the packing into the packing housing section, a packing main body is largely resilient-deformed, such that a large collapse in a through hole can be prevented, and the sealing ability of the seal due to deformation of the packing main body can be effectively enhanced.

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.

A webbing retractor is provided that reduces the amount of webbing that is pulled-out after operation of a pretensioner mechanism. In a webbing retractor, a lock pawlis set in a non-meshable state in which it cannot mesh with a lock gear. At a time when a pretensioner mechanismoperates and a clutch platerotates in a take-up direction, a lock stopperrotates together with the clutch plateand releases engagement with the lock pawl. Therefore, the lock pawlis rotated by a compression coil springand changed to a meshable state. In this way, immediately after rotational force in a pull-out direction is applied to the lock geardue to load from a vehicle occupant after operation of the pretensioner mechanism, the lock pawlmeshes with the lock gear, and pulling-out of a webbingis impeded. Therefore, an amount of the webbingwhich is pulled-out can be reduced.

Webbing retractor, webbing retracting method, and vehicle

A webbing take-up device () is disclosed, wherein a motor () is provided directly below a take-up shaft () between a pair of leg plates () with a rotary shaft () of the motor () disposed perpendicularly to the take-up shaft (), and a clutch () is provided at one side of one leg plate (). Further, a gear () of a motor gear portion () is removably connected to a worm gear () in a clutch gear portion (), and a mounting stay () is detachably attached to a case () with screws (), so that the motor () and the motor gear portion () can be detached independently of the case () while still being assembled together. Still further, a pretensioner mechanism () and a sensor mechanism () are provided at one end side of a spool (), and an urging mechanism () is disposed at the other end side thereof.

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.

Pretensioner device

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.

Webbing retractor

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.

Fixture and webbing take-up device

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.

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.

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.

Growing community of inventors

Aichi-ken, Japan

Tomonori Nagata