JP5006853B2 - Curtain airbag device - Google Patents

Description

  The present invention relates to a curtain airbag device that protects the head of an occupant, for example, in the event of a collision from the side of a vehicle (hereinafter abbreviated as a side collision).

  The curtain airbag device deploys an airbag having a plurality of chambers in a curtain shape along the side door glass when a high load is applied from the side of the vehicle body. If this curtain airbag device is installed, it is possible to effectively protect, for example, the head of an occupant seated on the front seat in the case of a side collision.

  By the way, the airbag of the curtain airbag device is stored in a folded state inside a roof trim that covers the roof side rail. On the other hand, an interior product such as an assist grip is attached directly to the inner panel of the roof side rail or via an assist grip bracket with a roof trim interposed therebetween.

  In that case, in order to protect the passenger | crew's head, it is necessary to provide the chamber of an airbag just under the said assist grip, for example. The assist grip having such a positional relationship may be damaged by being pushed strongly against the inside of the vehicle through the roof trim when the airbag is deployed by supplying high-pressure gas injected from the inflator. There are things to do.

Therefore, Patent Document 1 discloses a technique for guiding the deployment of the airbag in a direction away from the assist grip by disposing an engagement release promoting member between the roof trim and the airbag. If the technique disclosed in Patent Document 1 is adopted, the assist grip does not come off the roof trim and scatter when the airbag is deployed.
JP 2008-105583 A

  The disengagement promoting member is configured in a cantilever shape in which a proximal end portion is fixed to the inner panel and a distal end portion can be bent in the vehicle width direction. Therefore, in order to employ the technique of Patent Document 1, it is necessary to have a space that can accommodate the disengagement promoting member having the above-described configuration between the roof side rail and the roof trim, and a narrow layout in which such a space does not exist. In some cases, it cannot be adopted.

  The problem to be solved by the present invention is that the technique of Patent Document 1 cannot be adopted in the case of a narrow layout, so that the assist grip is damaged when the airbag is deployed, and it is possible to prevent dismounting and scattering. It is difficult.

  The curtain airbag device of the present invention is based on such a viewpoint, and aims at effectively preventing disengagement and scattering due to breakage of the assist grip when the airbag is deployed even in a narrow layout. To do.

That is, the curtain airbag device of the present invention is
An inflator,
A curtain airbag device provided with an airbag provided with a plurality of chambers that are supplied with gas ejected from the inflator and deployed between the occupant and the inner surface of the passenger compartment,
Of the airbag housed in a folded state between a roof side rail and a roof trim, roof trim side interior trim mounting position near Utotomoni covered with high strip of softness from the air bag base fabric, interior equipment mounting The most important feature is that the chamber located immediately below the position and the duct for guiding the gas ejected from the inflator to the chamber communicate with the upstream side of the position covered with the belt-like body .

  In the curtain airbag device of the present invention, since the airbag stored in a folded state is only provided with a belt-like body on the roof trim side near the interior product mounting position, the specifications and layout of the roof trim, interior product, etc. There is no need to change.

  In the curtain airbag device of the present invention, the inner article is not strongly pushed to the inside of the vehicle via the roof trim when the airbag is deployed by the action of the band-like body having higher rigidity than the airbag base fabric. Accordingly, it is possible to prevent dismounting due to breakage and scattering.

  Therefore, the chamber located immediately below the interior product mounting position and the duct for guiding the gas ejected from the inflator to the chamber can be communicated upstream of the position covered by the belt-like body. It becomes possible to extend in the direction.

  In the case of such an airbag, energy can be absorbed even in the chamber portion extended upward.

  In the present invention, “in the vicinity of the interior product mounting position” means not only that the interior product is located within the range of the length of the strip in the vehicle front-rear direction, but also a position outside the range of the strip. Even if it exists, it should just be a position which can protect interior goods.

  Further, “bending / softening” is defined by JIS L 1096, 8.19, and in the present invention, it is obtained by the A method (45 ° cantilever method) defined by 8.19.1.

  In the present specification, a portion or direction positioned in the direction toward the ceiling of the vehicle relative to a certain part is expressed as a term including “up” or “up”. In addition, a portion or direction that is positioned in the floor direction of the vehicle relative to a certain part is expressed as a term including “lower” or “lower”.

  In the present invention, since the belt is only provided on the roof trim side of the air bag interior fitting position, it is possible to mount the air bag due to damage to the interior trim without changing the specifications or layout of the roof trim, interior trim, etc. Detachment and scattering can be effectively prevented.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
As shown in FIG. 1, the curtain airbag device 11 of the present invention is developed by an inflator 12 and high-pressure gas ejected from the inflator 12, and protects the head of an occupant seated on the front and rear seats, for example. The configuration includes a bag 13.

  Among these, the airbag 13 has a configuration in which, for example, an airbag main body formed of OPW (one-piece woven) is provided with a chamber 13a that is deployed by the high-pressure gas and a duct 13b that guides the high-pressure gas to each chamber 13a. is there.

  For example, as shown in FIG. 2, the airbag 13 is folded into a roll shape in a substantially vertical direction and is elongated, along with the inflator 12 along the roof side rail 6 portion of the passenger compartment. It is stored between the roof side rail 6 and the roof trim 4.

  Then, when the sensor detects a high load of a predetermined value or more acting on the side of the vehicle body such as a side collision, the high pressure gas ejected from the inflator 12 in response to a signal from the sensor passes through each duct 13b. To be supplied.

  The curtain airbag device 11 of the present invention is made of a cloth thicker than, for example, the airbag 13 base fabric, on the roof trim 4 side of the airbag 13 stored in the folded state, for example, in the vicinity of the mounting position of the assist grip 1. It is set as the structure covered with the strip | belt-shaped body 14 of.

  This belt-like body 14 is for suppressing the force of the airbag 13 in the portion covered by the belt-like body 14 when the airbag 13 is deployed, to control the deployment direction to the vehicle exterior side. is there.

  Accordingly, the belt-like body 14 is required to be higher in rigidity than the airbag 13 base fabric, but the required flexibility is determined by the degree of suppression of the force to be deployed inside the vehicle. Moreover, the angle α of the circumferential direction covered with the strip | belt-shaped body 14 is determined by the expansion direction to control. Furthermore, the position covered with the strip 14 and the length L in the longitudinal direction are determined by the range to be controlled (see FIG. 3).

  The attachment means for the belt-like body 14 is not particularly limited. However, for example, when attaching by sewing as shown in FIG. In addition, 2a in FIG.2 (c) shows a sewing part.

  On the other hand, when attaching to the vicinity of the attachment piece 13c of the airbag 13, the slit 14b may be provided in the strip | belt-shaped body 14, and the said attachment piece 13c may be inserted and attached to this slit 14b.

  The curtain airbag device 11 of the present invention having the above-described configuration provides the assist grip 1 at the time of deployment by providing the belt-like body 14, particularly suppressing the deploying force of the chamber 13 a located at the portion where the belt-like body 14 is provided. Damage is reduced.

  Accordingly, the communication between the chamber 13a and the duct 13b is performed on the upstream side of the position covered with the strip 14 as shown in FIG. 1A, and the conventional airbag 2 shown in FIG. Compared to the above, the chamber 13a can be extended upward.

  In such a chamber 13a, in addition to the range in which the chamber 2a of the conventional airbag 2 can absorb energy, it is possible to absorb high energy up to just below the assist grip 1.

  1 and 5, 5 is an assist grip bracket for attaching the assist grip 1, 2 b in FIG. 5 is a duct, and 3 is an inflator.

  The present invention is not limited to the above examples, and it goes without saying that the embodiments may be appropriately changed as long as they are included in the scope of the technical idea described in each claim.

  That is, the curtain airbag device described above is a preferable example of the present invention, and other embodiments can be implemented or performed by various methods. In particular, the present invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless specifically limited.

  For example, the belt-like body 14 is not limited to a thick cloth and may be made of a resin such as a soft plastic plate as long as the band 14 has higher rigidity than the airbag 13.

  In addition, the position where the belt-like body 14 is attached is not limited to the part where the assist grip 1 is attached, but can be applied to a part where a hook, clip, lamp, sun visor or the like is attached as long as the same problem occurs.

  Furthermore, the airbag body is not limited to one formed by OPW (one-piece woven), but may be one formed by sewing. It may be folded in combination.

  Furthermore, the airbag may protect only the head of an occupant seated on the front seat when applied to a two-seater car.

  Although the curtain airbag device of the present invention is used by being installed in an automobile, it can also be provided on a vehicle such as an aircraft or a ship other than the automobile, and the same effect is exhibited.

BRIEF DESCRIPTION OF THE DRAWINGS It is the principal part schematic of the curtain airbag apparatus of this invention, (a) is the figure after airbag deployment, (b) is the figure of the accommodation state which folded the airbag, (c) is AA of (b). It is sectional drawing. (A) is a schematic view of the curtain airbag device of the present invention in the housed state, (b) is a perspective view of the belt-like body, (c) is an enlarged view of part B of (a) for explaining the attachment state of the belt-like body, d) It is CC sectional drawing of (c). (A) (b) is a figure explaining the length of the longitudinal direction of the strip | belt-shaped body of the curtain airbag apparatus of this invention, and the angle of the circumferential direction. (A) (b) is a figure similar to FIG.2 (c) (d) which shows the other example of a strip | belt-shaped body. It is a figure similar to FIG. 1 of the conventional curtain airbag apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Assist grip 4 Roof trim 6 Roof side rail 11 Curtain airbag device 12 Inflator 13 Air bag 13a Chamber 13b Duct 14 Strip

Claims (3)

An inflator,
A curtain airbag device provided with an airbag provided with a plurality of chambers that are supplied with gas ejected from the inflator and deployed between the occupant and the inner surface of the passenger compartment,
Of the airbag housed in a folded state between a roof side rail and a roof trim, roof trim side interior trim mounting position near Utotomoni the covering with a high band-shaped body having bending resistance from the air bag base fabric, interior equipment mounting A curtain airbag device characterized in that communication between the chamber located immediately below the position and a duct for guiding the gas ejected from the inflator to the chamber is performed upstream of the position covered by the belt-like body. . The curtain airbag device according to claim 1, wherein the strip is made of cloth . The curtain airbag device according to claim 1, wherein the belt-shaped body is made of resin .

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