JP4371896B2 - Airbag device mounting structure - Google Patents

Description

In the present invention, an airbag module for storing a folded airbag is disposed along the side edge of the roof, and the airbag that is inflated at the time of a vehicle collision is deployed downward along the inner surface of the side portion of the passenger compartment . The present invention relates to a structure for mounting an airbag device .

When cutting the airbag fabric that is deployed in a curtain shape from the side edge of the roof along the inner surface of the passenger compartment, a non-inflatable part is integrally formed on the upper part of the inflatable airbag body and folded. An airbag device for attaching an airbag to a vehicle body so that the non-inflatable portion is interposed between the airbag main body portion and the vehicle body panel is known from Patent Document 1 below. According to this airbag device, since the airbag main body portion that is inflated at the time of a vehicle collision is prevented from directly rubbing against the vehicle body panel by the non-inflatable portion, even if there is a burr on the edge of the vehicle body panel, The burr can prevent the airbag body from being damaged.
Japanese Patent Laid-Open No. 2002-12124

  However, in the above-described Patent Document 1, when the base fabric of the airbag is cut, it is necessary to integrally form a non-inflatable portion on the airbag main body. There is a problem that not only the cost increases due to the portion, but also the volume of the folded airbag increases by the amount of the non-inflatable portion, and a large installation space is required.

  To avoid this, burrs generated at the edge of the vehicle body panel located near the folded airbag can be removed with a grinder. However, this process takes a lot of time and increases costs. There is.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to avoid damage to an airbag due to burrs generated at an edge of a vehicle body panel with a simple and low-cost structure.

In order to achieve the above object, according to the first aspect of the present invention, an airbag module that accommodates a folded airbag is disposed along a side edge of the roof, and an airbag that inflates at the time of a vehicle collision is provided. In the mounting structure of the airbag device that is deployed downward along the inner surface of the side portion of the passenger compartment, the airbag module is attached so as to cover the compartment-side surface of the connecting portion between the roof inner and the pillar inner. is fixed to a gusset which is arcuately curved to be, the air bag device characterized by its lower edge of the gusset located in the vicinity of the air bag module, to form a curved portion which is curved in a direction away from the air bag to be inflated A mounting structure is proposed .

According to the first aspect, the air bag module for housing the folded airbag I tatami, secured to gusset covering the surface of the cabin side of the connecting portion between the roof inner and the pillar inner, a side edge of the roof together arranged along, the lower edge of the gusset located in the vicinity of the air bag module, so to form a curved portion which is curved in a direction away from the air bag inflates, the side inner surface of the passenger compartment at the time of collision of the vehicle It is possible to prevent the airbag that is deployed downward along the front side from being caught by the lower edge of the gusset and being damaged. In addition , since it is only necessary to curve the lower edge of the gusset for fixing the airbag module, the cost is lower than when deburring the edge of the vehicle body panel or providing a special protective member.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

  1 to 3 show an embodiment of the present invention, FIG. 1 is a view showing the inner surface of a vehicle compartment provided with an airbag device, and FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. FIG. 3 is an operation explanatory diagram corresponding to FIG.

As shown in FIG. 1, the vehicle side of the vehicle, a door opening 14 for the front door 13 is attached is formed between front pillar 11 and center pillar 12, rear door 16 is mounted between the center pillar 12 and rear pillar 15 A door opening 17 is formed. An airbag module 19 is provided along a side edge of the roof 18 that extends from the upper end of the front pillar 11 to the upper end of the rear pillar 15. When acceleration of a predetermined value or more is detected at the time of a side collision or rollover of the vehicle, the airbag 21 accommodated in the airbag module 19 is inflated by the high-pressure gas supplied from the inflator 20 disposed inside the rear pillar 15. The inner side of the vehicle body, that is, the front pillar 11, the center pillar 12, the rear pillar 15, the door glass 13a of the front door 13 and the door glass 16a of the rear door 16, and an occupant sitting on the front seat and the rear seat are shielded. It develops in a curtain shape downward from the side edge of the roof 18.

  In addition, although the airbag apparatus of the substantially same structure is each provided in the right-and-left both sides of the vehicle body, the thing provided in the right side of the vehicle body as the representative is demonstrated below.

  As shown in FIGS. 1 and 2, the roof 18 is composed of a roof outer 31 and a roof inner 32, and the center pillar 12 is composed of a pillar outer 33 and a pillar inner 34, which are along the side edges of the roof 18. And welded. The roof side rail portion 33a at the upper end of the pillar outer 33 and the roof side rail portion 34a at the upper end of the pillar inner 34 extend in the longitudinal direction of the vehicle body toward the upper portion of the front pillar 11 and the upper portion of the rear pillar 15, and below that. The pillar outer 33 and the pillar inner 34 are columnar and extend in the vertical direction. The upper and lower ends of the arcuately curved gusset 30 are welded so as to cover the surface of the connecting portion between the roof inner 32 and the pillar inner 34 on the side of the passenger compartment 35.

  A surface of the roof inner 32 on the side of the passenger compartment 35 and a surface of the roof inner rail 34 a of the roof inner rail portion 34 a on the side of the passenger compartment 35 are covered with a roof lining 38 made of synthetic resin. The surface of the pillar inner 34 on the side of the passenger compartment 35 is covered with an upper pillar garnish 36 and a lower pillar garnish 37 made of synthetic resin. An airbag module 19 for storing the folded airbag 21 is fixed to the gusset 30 of the pillar inner 34 with a bolt 40, and the rear end of the airbag 21 is connected to the inflator 20 in the rear pillar 15.

  The upper pillar garnish 36 includes a boss portion 39a protruding toward the pillar inner 34, and the clip 41 attached to the boss portion 39a engages with the clip hole 34b of the pillar inner 34. An end edge 38a of the roof lining 38 is engaged from above with a roof lining engagement groove 39b formed in the U-shaped upper end of the upper pillar garnish 36. A stepped airbag deployment guide wall 39c extends from the upper end portion of the roof lining engagement groove 39b toward the center pillar 12 and its lower surface is reinforced by crank-shaped reinforcing ribs 39d.

  A locking projection 39e extends upward from the upper end of the airbag deployment guide wall 39c. By engaging the locking projection 39e with a locking hole 34c formed in the pillar inner 34, the upper pillar garnish 36 is pillared. It is fixed to the inner 34.

  The airbag module 19 is disposed at a position sandwiched between the roof side rail portion 34a of the pillar inner 34 and the roof lining 38, and an airbag deployment guide wall 39c facing the lower surface of the airbag module 19 is provided in the vehicle. Since it is inclined downward toward the chamber 35 side, the airbag 21 that is inflated by the high-pressure gas generated by the inflator 20 at the time of a side collision of the vehicle or the like is caused by the reaction force received from the roof side rail portion 34a of the pillar inner 34. It is guided toward the vehicle compartment 35 along the upper surface of the airbag deployment guide wall 39c. As a result, as shown in FIG. 3, the end edge 38 a of the roof lining 38 is separated from the roof lining engagement groove 39 b of the upper pillar garnish 36, and the airbag 21 is deployed in the vehicle interior 35 through the opening formed there. To do.

  Thus, by forming the airbag deployment guide wall 39c integrally with the upper pillar garnish 36, the number of parts and the number of assembling steps can be reduced as compared with the case where the airbag deployment guide wall 39c is formed of a separate member. Can do. In addition, since the airbag deployment guide wall 39c is reinforced by the reinforcing ribs 39d, the airbag 21 can sufficiently withstand the pressure of inflation.

  By the way, since the airbag module 19 is disposed in the vicinity of the lower edge of the gusset 30 welded to the pillar inner 34, it is inevitable that the airbag 21 rubs against the lower edge of the gusset 30 when the airbag 21 is inflated. However, in the present embodiment, the curved portion 30a is formed at the lower edge of the gusset 30 and curved in the direction away from the airbag 21, so that the inflating airbag 21 is caught by the lower edge of the gusset 30 and damaged. It is possible to prevent the air bag 21 and to deploy the airbag 21 reliably.

  The curved portion 30a of the gusset 30 can be processed at the same time when the gusset 30 is punched out of the steel sheet by pressing, so that the processing man-hour is reduced and the cost is reduced as compared with the case where the edge of the gusset 30 is deburred. Can contribute to down. In addition, since a special protective member for protecting the airbag 21 from the burrs at the edge of the gusset 30 is not required, the number of parts and the number of assembling steps can be reduced to further reduce the cost.

  Although the embodiments of the present invention have been described above, various design changes can be made without departing from the scope of the present invention.

For example, although the center pillar 12 has been described in the embodiment, the present invention can also be applied to the front pillar 11 and the rear pillar 15 .

The figure which shows the inner surface of the compartment of the motor vehicle provided with the airbag apparatus 2-2 line enlarged sectional view of FIG. Action explanatory diagram corresponding to FIG.

18 Roof
19 air bag module 21 the air bag 30 Gase' preparative <br/> 30a curved portion
32 roof inner
34 Pillar inner 35 Car compartment

Claims (1)

An airbag module (19 ) for storing the folded airbag (21) is disposed along the side edge of the roof (18), and the airbag (21) that is inflated at the time of a vehicle collision is disposed on the side of the vehicle compartment (35). In the mounting structure of the airbag device adapted to be deployed downward along the inner surface,
The airbag module (19) is fixed to an arcuately curved gusset (30) attached so as to cover a surface of the connecting portion between the roof inner (32) and the pillar inner (34) on the side of the passenger compartment (35). With
Airbag, characterized in that the lower edge of the gusset (30) located in the vicinity of the air bag module (19) to form a curved portion which is curved in a direction away from the air bag (21) for expanding the (30a) Device mounting structure.

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