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.

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.

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.

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.

Abstract: A pretensioner device in which, at a time of rapid deceleration of a vehicle such as a collision, a gas generator generates gas and the pretensioner device moves a piston in a direction of tensing a webbing. When, due to delayed detection by an acceleration sensor, the gas generator operates after a stretch-out load has been applied to a wire, high-pressure and high-temperature gas within a gas chamber contacts a guard pipe, which is formed of a material having a high thermal conductivity and is disposed within the gas chamber, and is cooled, and passes through a clearance and a pin hole communicating regions to a front and rear of the piston, and is discharged into a cylinder.

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.

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.

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.

Abstract: A pretensioner device in which, at a time of rapid deceleration of a vehicle such as a collision, a gas generator generates gas and the pretensioner device moves a piston in a direction of tensing a webbing. When, due to delayed detection by an acceleration sensor, the gas generator operates after a stretch-out load has been applied to a wire, high-pressure and high-temperature gas within a gas chamber contacts a guard pipe, which is formed of a material having a high thermal conductivity and is disposed within the gas chamber, and is cooled, and passes through a clearance and a pin hole communicating regions to a front and rear of the piston, and is discharged into a cylinder.

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.