Kabushiki Kaisha Tokai Rika Denki Seisakusho

Toyota Jidosha Kabushiki Kaisha

Yasutaka Watanabe

Kenji Matsui

Fuminori Teraoka

Takashi Kawaharazaki

Shinji Mori

Hitoshi Iwata

Toshimasa Yamamoto

Tomonori Nagata

Yuji Nishimura

Masaru Ukita

Noritada Yoshitsugu

Shinichi Okubo

Keiichi Tamura

Katsuki Asagiri

Keisuke Imai

Yasuho Kitazawa

Hiroshi Tsuge

Hideki Tanaka

Kohbun Tanaka

Keiichi Kato

Shigeru Kotama

Yusuke Hirokawa

Akio Numazawa

Hiroaki Yamazoe

Hiroaki Yamazohe

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

When gas is generated in an emergency situation of a vehicle and a cylinder is driven, one of wires rotates a pulley via a small diameter portion of the pulley. For this reason, the other wire connected to a large diameter portion of the pulley has a length wound around the large diameter portion, which is longer than that of the one wire. A drive stroke of the cylinder is increased and transmitted to a seat belt buckle. As a result, even if the cylinder is of a small size, a long pulling stroke is applied to a seat belt.

Buckle retractor

A shoulder anchor height adjusting apparatus movably adjusts the height of a shoulder anchor. The shoulder anchor is attached to a slider, which is supported by a rail extending from the upper portion of the side wall of the vehicle in the vertical direction so as to be guided along the rail. Further, the slider moves in the vertical direction of the vehicle so as to move the shoulder anchor in a likewise direction. A long bolt is disposed between the slider and the rail and at the upper portion of the side wall of the vehicle. The long bolt has an axis in the vertical direction of the vehicle, and is provided so as to be rotatable about the axis. An elevator nut is screwed into the bolt, and is moved in the vertical direction of the vehicle by rotation of the bolt. An arm outwardly extends from the slider in the transverse direction of the vehicle, has a contact portion for contacting the elevator nut. The arm moves the slider in the vertical direction of the vehicle since the contact portion is pushed by the elevator nut as the elevator nut moves in the vertical direction.

Shoulder anchor height adjusting apparatus

A preloader for use in a webbing retractor for retracting an occupant-restraining webbing forcibly onto a takeup shaft at the time of a sudden deceleration of a vehicle. The preloader includes a angular shaft rotating integrally with the takeup shaft; a deformable member disposed around the angular column shaft; and a wire connected to the deformable member and wound therearound. The wire is tightly wound around the deformable member at the time of a sudden deceleration of the vehicle, thereby causing the deformable member to undergo deformation and engage with the angular shaft. The angular shaft is hence rotated integrally with the deformable member so as to positively rotate the takeup shaft in a taking-up direction.

Preloader for a webbing retractor

A shoulder anchor height adjusting apparatus is provided to adjust height of a shoulder anchor. A long bolt disposed at an upper portion of a side wall of a vehicle, has its axis in a vertical direction of the vehicle, and is provided so as to be rotatable about the axis. A nut is screwed to the long bolt, and moved in the vertical direction of the vehicle according to rotation of the long bolt. A slider fitted to the shoulder anchor, is supported by the nut, and moves in the same direction as moving direction of the nut as the nut moves in the vertical direction of the vehicle so as to move the shoulder anchor in the vertical direction. An engaging apparatus is provided between a slider and the long bolt. Normally, the engaging apparatus is in a disengaged from the slider. When the vehicle rapidly decelerates, load applied to the shoulder anchor causes the nut to displace the slider in the vertical direction of the vehicle resulting in the engaging apparatus being in an engaged with the slider so as to prevent the slider from moving in the vertical direction of the vehicle.

Shoulder anchor weight adjusting apparatus

A preloader for use in a webbing retractor for retracting an occupant-restraining webbing onto a webbing takeup shaft, and adapted to allow a webbing to be applied to a vehicle occupant with appropriate tightness. An engaging shaft is coaxially coupled with the takeup shaft, and a rotating drum is disposed around the engaging shaft at a fixed distance from the engaging shaft. The rotating drum is held by a plate, and a wire is tightly wound around the outer periphery of the rotating drum. A clamp member is disposed swingably in a direction in which the clamp member engages the webbing and in a direction in which the clamp member moves away therefrom. An urging member is provided for constantly urging the clamp member in a webbing-clamping direction. A trigger member is disposed between the clamp member and the plate, and holds the clamp member in spaced-apart relationship with the webbing. A driving force is imparted to the wire when the vehicle suddenly decelerates, and the wire is tightly wound around the drum, thereby allowing the rotating drum and the engaging shaft to rotate integrally in a webbing-taking-up direction. As the plate rotates with the rotating drum, the state in which the clamp member is held by the trigger member in spaced-apart relationship with the webbing is canceled. Consequently, the webbing is clamped by the clamp member, thereby preventing the tight winding of the webbing and restraining the occupant reliably.

Preloader for use in a webbing retractor

Disclosed herein is an automatic seat belt system. A guide rail is mounted on a vehicle body, and a driving tape is disposed along the length of the guide rail. A drive means is energized to move a slider to either one of two positions where a webbing restrains an occupant or releases the occupant therefrom. One end of the webbing used for restraining the occupant is supported to the slider which is maintained in engagement with each of the openings defined in the tape. In addition, the slider is movable in the longitudinal direction of the guide rail, and disposed movably with respect to the guide rail. A stopper is maintained in engagement with the slider in the webbing-restraining position so as to prevent the slider from being moved in the direction to which the webbing is pulled. When the load in the upward direction of the vehicle is applied to the slider so as to move the slider upward, an engagement portion of the slider is brought into engagement with an end of the stopper in the lower direction of the vehicle so as to prevent the slider from being moved along the guide rail.

Automatic seat belt system

In an automatic seat belt apparatus, a first tape is connected to a drive source. A second tape is connected to a slider and transmits a driving force from the drive source to the slider via the first tape. When a webbing is applied, a slide piece abuts a stopper. The slide piece moves relatively with respect to a lock plate against an urging force of a compression coil spring. Along with movement of the slide piece, the maintenance of the tapes at a connected position of the lock plate is cancelled. The lock plate rotates due to the urging force of the compression coil spring, and a separated position, at which the first tape and the second tape are separated, is maintained.

Automatic seat belt apparatus

A preloader adapted to forcibly pull a webbing in a taking-up direction when the vehicle suddenly decelerates, so as to allow the webbing to be applied closely around an occupant. A clamp member for clamping the webbing is provided to prevent a subsequent tight winding of the webbing. The clamp member is constantly urged in a webbing-clamping direction by an urging member, and is normally held in a position spaced apart from the webbing against an urging force of the urging member. As the holding is canceled after the forcible taking up of the webbing, the clamp member is capable of clamping the webbing.

Preloader

An automatic seat belt system in which a slider supported by a guide rail and adapted to be worn by a vehicle occupant is moved from a webbing-application canceling position to a webbing applying position so as to apply the webbing around the occupant. The automatic seat belt system includes a slider holding portion for retaining the slider at the webbing applying position and movable along the guide rail in the retaining state, and a lock pin for retaining the slider holding member onto a chassis by being inserted in a hole provided in the chassis and for setting the slider holding member in a movable state as the lock pin is pulled out of the hole. Also provided is a controller for moving the slider by a predetermined distance from the webbing applying position toward the webbing-application canceling position by reversely rotating the motor before the lock pin is pulled out of the hole. Accordingly, when the lock pin is pulled out of the hole, a large frictional force does not act between the lock pin and an inner peripheral portion of the hole.

A webbing retractor which, when a webbing is drawn out instantaneously, prevents the drawing out of the webbing by operating a lock mechanism. In addition, when a vehicle is decelerated suddenly, the drawing out of the webbing is also instantaneously prevented by causing a pawl to engage with a lock wheel preventing the lock wheel from rotating. The webbing retractor includes a lever which is swung in such a manner as to be movable between a first position in which the pawl is made unengageable with the lock wheel and a second position in which the pawl is made engageable with the lock wheel. The webbing retraction also includes a lever swing member which causes the lever to be located in the first position as the take-up shaft rotates in a webbing taking-up direction and to be situated in the second position as the take-up shaft rotates in a webbing draw-out direction. Accordingly, the pawl is prevented from engaging with the lock wheel at a take-up limit of the webbing.

Webbing retractor

An apparatus for driving an intermediate portion of a webbing for use in a seatbelt system for restraining an occupant of a vehicle by means of a webbing having one end accommodated in a webbing accommodating device through a biasing force is arranged to withdraw the webbing from the accommodating device in opposition to the biasing force. Accordingly, when an occupant is to apply the webbing to himself by withdrawing it from the accommodating device, the webbing can be withdrawn and applied with a small manual force.

Growing community of inventors

Aichi, Japan

Yasutaka Watanabe