JPH10329645A - Safety device of seat belt device with pretensioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the release of a safety device from being forgotten after mounted on a car body in a seat belt device with pretensioner in which the safety device is laid in operating state so that a pretensioner is not faultily operated until the mounting on the car body is ended. SOLUTION: This seat belt device comprises a belt winding device having a pretensioner and a belt to be drawn from the belt winding device 1. The safety lever 6 of a safety device for preventing the faulty explosion of the pretensioner has a recessed groove 6a. Thus, when a pillar trim 5 is installed to the pillar 4 after the seat belt device with pretensioner is mounted on the pillar 4, the rear terminal part 5b of the pillar trim 5 is engaged with the recessed groove 6a of the safety lever 6 when the safety lever 6 is in operating position so that the pillar trim 5 can not be mounted on the pillar 4, and the mounting of the pillar trim 5 is allowed by setting the safety lever 6 to release position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a seat belt device with a pretensioner in a vehicle.

[0002]

2. Description of the Related Art A belt winding device (emergency lock retractor) having a function of detecting an impact generated at the time of a collision and locking the movement of the belt in a pull-out direction with a seat belt device of a vehicle, and the belt Conventionally, a pretensioner that rotates a winding device in a winding direction and forcibly tightens a belt is provided to enhance restraint of an occupant.

[0003] The pretensioner is usually mounted integrally with the belt winding device, and when a sensor detects a collision, explosives are exploded and the explosive gas activates an actuator to force the belt winding mechanism in the winding direction. The pre-tensioner is an electric actuation mechanism that operates by the electric signal of the sensor, and the mechanical actuation mechanism that mechanically operates by sensing the impact at the time of collision with the inertial body. It is roughly divided into pretensioners.

[0004] Among the above, the electric actuating mechanism has no danger of erroneous explosion unless the electric circuit is connected, but the pretensioner of the mechanical actuating mechanism has a vibration or the like during the transfer of parts or the mounting work. There is a risk of accidental explosion, and a safety device is conventionally provided to prevent such an accidental explosion.
Then, after the seat belt device having the pretensioner of the mechanical operating mechanism is attached to the vehicle body, the safety device is released.

However, there is a concern that the operator may forget to release the safety device only by instructing that the safety device must be released after the mounting. As a countermeasure, after attaching the belt take-up device with the pretensioner to the vehicle body, use a trim (interior material) attached to the vehicle body so as to cover them, and the safety device of the pretensioner must be released unless the safety device of the pretensioner is released. A type in which the lever interferes to hinder installation of the trim has been conventionally developed.
No. 3 has been published.

[0006]

In the above prior art,
If the safety device is not released, the lever of the safety device protrudes toward the interior of the vehicle, and the tip of the lever hits the rear surface of the trim (interior material) to hinder installation of the trim. A configuration is disclosed in which a plurality of abutting plates are integrally formed so as to protrude so that a lever of the safety device interferes with the plurality of abutting plates and the trim cannot be attached unless the safety device is released.

[0007] Among the above, the conventional structure in which the tip of the lever hits the back surface of the trim and hinders installation of the trim, the trim is damaged by the tip of the lever if the trim is accidentally pressed without releasing the safety device. There is a problem that it may not be possible. In addition, the conventional structure in which a plurality of abutting plates protruding in the form of ribs are integrally protruded on the back surface of the trim not only complicates trimming but increases the cost, but also causes the seat belt to protrude due to the plurality of abutting plates protruding. Since there is a possibility that the belt may interfere with the contact plate and may be damaged, there is a problem that the method cannot be applied if there is not much room in the mounting space of the belt winding device with a pretensioner.

An object of the present invention is to provide a configuration that solves the above-mentioned problems.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a seat belt device with a pretensioner comprising a belt winding device provided with a pretensioner and a belt pulled out of the belt winding device. A safety device for preventing accidental explosion is provided, and a safety lever for switching between an operation position of the safety device and a release position of the safety device is provided, and the seat belt device with the pretensioner is attached to a vehicle body pillar. Then, when attaching the pillar trim to the vehicle body pillar, when the safety device is in the operating position, one of the front and rear ends of the pillar trim is fitted and engaged, and it is impossible to attach the pillar trim to the vehicle body pillar. The safety lever is provided with an engaging portion formed of a concave groove, so that forgetting to release the safety device can be reliably prevented. Even if you forget to release the safety device and press the pillar trim against the pillar, only one of the front and rear ends of the pillar trim will fit into the engaging portion formed by the concave groove of the safety lever. There is no fear. Further, in the above, when the safety device is at the release position, the safety lever has a guide surface which guides the assembly of the terminal portion substantially along the assembling locus of one of the front and rear terminals of the pillar trim, and When the safety lever is correctly switched after the seat belt device is mounted on the vehicle body pillar, the work of mounting the pillar trim can be facilitated by the safety lever.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a belt winding device (emergency lock retractor) integrated with a pretensioner. The belt winding device 1 is stored and attached below a pillar (center pillar or the like) 4. The belt 2 drawn upward from the belt winding device 1 is pulled downward through a belt turning member (belt through) 3 provided at a predetermined height position of a pillar 4, and a lower end of the vehicle body such as a side sill. Fixed at the bottom. A pillar trim 5 is attached to the inside of the vehicle body of the pillar 4 between the belt 2a pulled upward and the belt 2b drawn downward, and the pillar trim 5 moves upward to the belt winding device 1. The configuration of a conventional vehicle seat belt device is so configured that the belt 2a that is routed is partially covered. The pretensioner is of a mechanical operating mechanism and is provided with a safety device so as not to cause an accidental explosion during handling such as transportation and mounting work. In FIG. 1, reference numeral 6 denotes a safety lever of the safety device. is there.

As is conventionally known, the pretensioner integrated with the belt winding device 1 comprises a G sensor composed of an inertial body, a primer, a gas generator, and an actuator such as a cylinder mechanism. When the G sensor moves at the collision acceleration and the tip of the G sensor strikes the primer, the primer operates to explode the explosive in the gas generating portion, and the gas generated by the explosion moves the piston of the actuator, and The belt winding drum is forcibly rotated in the belt winding direction.

The pretensioner is provided with a safety device. The safety device can be switched between a safety device operating position in which the movement of the G sensor is locked and a safety device release position in which the movement of the G sensor is not locked by rotating the safety lever 6. Until the mounting of the seat belt device to the vehicle body is completed, the safety device is held in the operating position so that the pretensioner does not accidentally explode during handling such as transportation and mounting work, and the safety device is mounted on the vehicle body of the seat belt device. When the safety device 6 is mounted, the safety lever 6 is turned by 90 ° to set the safety device to the release position, and then the pillar trim 5 is mounted on the pillar 4.

The safety lever 6 is shown in FIGS. 2 and 3 (A).
As shown in the figure, at the operating position of the safety device, it becomes a position overlapping one of the front and rear of the pillar 4, for example, the inner surface near the rear edge 4 b, and in this state, a concave groove 6 a which is vertically formed on the indoor side surface. ing. Then, as shown in FIG.
A guide surface 6b is formed on a rear surface of the safety device at the release position of the safety device, the guide surface 6b being located along one of the front and rear of the pillar trim 5, for example, an assembling locus of the rear terminal portion 5b.

The pillar trim 5 is mounted, for example, such that the front end 5a is hooked on the front edge 4a of the pillar 4 and the rear end 5b is fixed to the rear edge 4b of the pillar 4. Shall be adopted.

In the above description, when the seat belt device including the belt winding device 1 in which the pretensioner is integrally incorporated in the cross section of the pillar 4 is mounted, and then the pillar trim 5 is mounted, the safety lever 6 of the pretensioner safety device is turned on. If the releasing operation is not performed, as shown in FIG. 3A, the front terminal 5a of the pillar trim 5 is hooked on the front edge 4a of the pillar 4, and the rear terminal 5b of the pillar trim 5 is When the safety lever 6 is positioned on the trailing edge 4b of the safety lever 6, the rear end 5b of the pillar trim 5 is fitted into the groove 6a of the safety lever 6 and engaged therewith. The pillar trim 5 cannot be mounted.

When the safety lever 6 is turned by 90 ° to the release position of the safety device, the guide surface 6b of the safety lever 6 is located at the rear side, and as shown in FIG. Of the front end portion 5a of the pillar 4
When the rear terminal 5b is assembled to the rear edge 4b of the pillar 4, the rear terminal 5b is guided in sliding contact with the guide surface 6b of the safety lever 6, so that the pillar trim 5 can be mounted. It is intended to be easy.

As described above, after the seat belt device is mounted on the pillar 4, if the pillar trim 5 is to be mounted without releasing the safety device of the pretensioner, one of the front and rear of the pillar trim 5 is attached to the safety lever 6 of the safety device. The terminal portion of the safety device is engaged to make it impossible to mount the pillar trim 5, thereby securely preventing forgetting to release the safety device. When the safety lever 6 of the safety device is set to the safety device release position, The safety lever 6 functions as a guide member when the pillar trim 5 is assembled, so that the pillar trim can be easily attached.

Further, even if the pillar trim 5 is pressed against the pillar 4 without forgetting to release the safety device, only one end of the pillar trim 5 is fitted into the concave groove 6a of the safety lever 6, so that the pillar trim 5 itself is not fitted. There is no risk of damage.

[0020]

As described above, according to the present invention, in the seat belt device with the pretensioner, the safety lever for switching the safety device of the pretensioner between the safety device operating position and the safety device releasing position is provided with a safety lever. When the pillar trim is to be mounted on the pillar in the device operating position, one of the front and rear ends of the pillar trim is fitted and engaged to form a groove that makes mounting of the pillar trim impossible. Form a guide surface along the assembling trajectory of one of the front and rear terminals of the pillar trim,
The guide surface of the safety lever guides the assembling of the pillar trim when the pillar trim is attached to the pillar, so that it is possible to reliably prevent forgetting to release the safety device after the seat belt device with pretensioner is attached to the pillar. After the safety device is released, the safety lever can function as a guide member that facilitates the work of attaching the pillar trim, and even if you forget to release the safety device and press the pillar trim against the pillar, There is no danger of the pillar trim being damaged, and in combination with the simple structure and low cost, a great effect can be obtained in practical use.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is an overall perspective view illustrating a state in which a seatbelt device to which the present invention is applied is attached to a vehicle body pillar.

FIG. 2 is an enlarged perspective view showing details of a safety lever shown in FIG. 1;

FIG. 3 shows a state after the seat belt device is mounted on the vehicle body pillar.
FIGS. 4A and 4B are cross-sectional plan views illustrating a state in which a pillar trim is mounted on a vehicle body pillar, wherein FIG. 4A illustrates a state in which the safety device is not released, and FIG. 4B illustrates a state in which the safety device is released.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt winding device 2 Belt 2a Belt pulled up 2b Belt pulled down 3 Belt fold member 4 Pillar 5 Pillar trim 5a Front terminal 5b Rear terminal 6 Safety lever 6a of safety device Groove 6b Guideway

Claims (3)

[Claims] 1. A seat belt device with a pre-tensioner, comprising: a belt winding device having a pre-tensioner; and a belt pulled out from the belt winding device.
A safety device is provided for preventing an erroneous explosion of the pretensioner, and a safety lever for switching between an operation position of the safety device and a release position of the safety device is provided. When attaching the pillar trim to the vehicle body pillar after attaching it to the vehicle body pillar, when the safety device is in the operating position, one of the front and rear ends of the pillar trim is engaged to attach the pillar trim to the vehicle body pillar. A safety device for a seatbelt device with a pretensioner, wherein an engaging portion that makes it impossible is provided on the safety lever. 2. The safety device for a seat belt device with a pretensioner according to claim 1, wherein the engaging portion provided on the safety lever is a concave groove into which one of front and rear ends of the pillar trim is fitted and engaged. A safety device for a seat belt device with a pretensioner, wherein 3. The safety device for a seatbelt device with a pretensioner according to claim 1, wherein the seatbelt device with a pretensioner is mounted on a vehicle body pillar, and then a pillar trim is mounted on the vehicle body pillar. A seat having a pretensioner, wherein a guide surface for guiding the assembling of the terminal portion substantially along the assembling locus of one of the front and rear terminals of the pillar trim when the is at the release position is formed on the safety lever. Belt device safety device.