JP6717177B2 - Curtain airbag system for vehicles - Google Patents

Description

The present invention relates to a vehicle curtain airbag device.

The following Patent Document 1 discloses a vehicle curtain airbag device. This vehicle curtain airbag device is provided on a roof side rail, and in the event of a side collision of the vehicle, the curtain airbag is inflated and deployed in a curtain shape between a vehicle side portion and a seated occupant to thereby cause the occupant's head. Restrain.

JP, 2012-35696, A

By the way, when a collision load is input centering on the center pillar of the vehicle during a side collision, the roof side rail is deformed outward in the vehicle front-rear direction about the center pillar. Therefore, in the configuration disclosed in Patent Document 1, since the curtain airbag deploys along the roof side rails, the curtain airbag that inflates and deploys at the time of a side collision has a vehicle front-rear direction outer side portion of the curtain airbag that is a vehicle plane. It is tilted outward in the vehicle width direction. Further, the vehicle lower side from the lower end of the roof side rail of the curtain airbag is displaced outward in the vehicle width direction, whereby the vehicle front-rear direction outer portion of the curtain airbag is tilted further outward in the vehicle width direction. That is, the inclination of the outer side portion of the curtain airbag in the vehicle front-rear direction to the outer side in the vehicle width direction becomes large. Therefore, when the head of the occupant comes into contact with the outer side of the curtain airbag in the vehicle front-rear direction, a rotational moment may be generated in the head of the occupant, and the head of the occupant may not be sufficiently protected. Therefore, the above-mentioned prior art has room for improvement in this respect.

In view of the above facts, an object of the present invention is to provide a curtain air bag device for a vehicle, which can sufficiently protect the head of an occupant during a side collision of the vehicle.

The vehicle curtain airbag apparatus according to the first aspect of the invention is housed in a state of being rolled along the roof side rails, and receives gas supply during a side collision to provide a space between a vehicle side portion and a seated occupant. A curtain airbag that is inflated and expanded in a curtain shape, and is attached to the vehicle front-rear direction outer side from a position corresponding to the head of the seated occupant on the roof side rail, and at least the tip is made of a material having dilatancy characteristics. and are bent along an outer surface of the curtain airbag is roll-folded, the curtain the tip portion during inflation and deployment of the curtain air bag is positioned on the vehicle lower side from the lower end of the roof side rail A guide member that supports the airbag from the outside in the vehicle width direction.

According to the first aspect of the present invention, the curtain airbag is accommodated along the roof side rail, and inflates and deploys in a curtain shape between the vehicle side portion and the seated occupant upon receiving gas supply during a side collision. To be done. A guide member is attached to the roof side rail. The guide member has a front end located below the lower end of the roof side rail in the vehicle when the curtain airbag is inflated and deployed, and supports the curtain airbag from the outside in the vehicle width direction. Therefore, when the curtain airbag is inflated and deployed, the front end portion of the guide member can prevent the curtain airbag from moving outward in the vehicle width direction from the lower end portion of the roof side rail.

Here, the guide member is provided outside the vehicle front-rear direction from a position corresponding to the seated occupant on the roof side rail. Therefore, when the outside of the roof side rail in the vehicle front-rear direction is deformed outward in the vehicle width direction around the center pillar during a side collision, the vehicle front-rear direction outer side of the head of the seat occupant in the curtain airbag is the lower end of the roof side rail. The movement from the outside to the vehicle width direction is suppressed. In other words, it is possible to reduce the angle of this inclination when the portion of the curtain airbag outside the head of the seated occupant in the vehicle front-rear direction inclines outward in the vehicle width direction in the vehicle plan view. Therefore, it is possible to suppress the occurrence of a rotation moment on the head of the occupant when the head of the occupant comes into contact with the curtain airbag.

The vehicle curtain airbag device according to the first aspect of the present invention has an excellent effect that the occupant's head can be sufficiently protected in the case of a side collision of the vehicle.

FIG. 1 is a perspective view showing a state in which a side surface of a vehicle having a vehicle curtain airbag device according to an embodiment is viewed from a vehicle rear side toward a vehicle front side. FIG. 1A is a cross-sectional view showing a state of a vehicle side portion of a vehicle having a vehicle curtain airbag device according to an embodiment in a normal state as seen from the vehicle upper side, and FIG. It is sectional drawing which shows the state of a vehicle side part at the time of a side collision. FIG. 1A is an enlarged cross-sectional view showing a state in which the normal curtain airbag in FIG. 1 is cut along the line AA, and FIG. 1B is a rear view of the normal curtain airbag and the guide member. It is a perspective view showing the state seen toward the vehicle front side. FIG. 3A is an enlarged sectional view corresponding to FIG. 3A showing the curtain airbag at the time of inflation and deployment, and FIG. 3B is corresponding to FIG. 3B showing the curtain airbag and the guide member at the time of inflation and deployment. FIG. It is sectional drawing which shows the state at the time of the side collision of the vehicle which has the curtain airbag apparatus for vehicles which concerns on the contrary.

An embodiment of a vehicle curtain airbag device (hereinafter, referred to as “curtain airbag device”) 10 according to the present invention will be described below with reference to FIGS. 1 to 4. In these figures, the arrow FR indicates the vehicle front-rear direction front side, the arrow OUT indicates the vehicle width direction outer side, and the arrow UP indicates the vehicle up-down direction upper side. The curtain airbag device 10 according to the present embodiment is basically symmetrically configured (symmetrically with respect to the vehicle front-rear direction line passing through the middle of the vehicle width direction), and therefore, in FIG. One side (the left side of the vehicle) is shown, and the following description will be made mainly on the one side in the vehicle width direction.

As shown in FIG. 1, a curtain airbag device 10 is provided inside a vehicle width direction of a roof side rail 14 that constitutes a part of a vehicle side portion of a vehicle 12. The curtain airbag device 10 includes an inflator (not shown) that generates gas when a side collision occurs, a curtain airbag 16 that is connected to the inflator and inflates and deploys by supplying gas from the inflator, and a vehicle width of the curtain airbag 16. And a guide member 18 provided on the outside in the direction.

The inflator is formed in a substantially columnar shape having the longitudinal direction in the vehicle front-rear direction, and is arranged inside the roof side rail 14 in the vehicle width direction. The inflator is electrically connected to an airbag ECU (not shown), and the inflator is activated by the control of the airbag ECU.

The curtain airbag 16 is roll-folded inward in the vehicle width direction (see FIG. 3A), and is folded in a long shape with the vehicle front-rear direction as a longitudinal direction. 14 and the rear pillar 22 are continuously arranged. The curtain airbag 16 is configured as a rectangular cloth-shaped member having a size capable of covering both the front side window 24 and the rear side window 25 when viewed from the side of the vehicle. More specifically, the curtain airbag 16 includes a gas introduction part (not shown) into which the tip side of the inflator is inserted, and a gas supply (not shown) linearly extending in the vehicle front-rear direction along the upper edge of the curtain airbag 16. A curtain airbag main body portion 26 is provided corresponding to the front seat and the rear seat on the road and on the vehicle lower side of the gas introduction portion. The curtain airbag main body 26 has a plurality of fixing members extending upward from the vehicle for fixing to the inner panel 14A of the roof side rail 14 via a base end portion 28 of a guide member 18 described later. The part 27 is formed.

A plurality of guide members 18 (two in this embodiment) are provided on the front pillar 20 side of the roof side rail 14 at intervals in the vehicle front-rear direction. As shown in FIG. 3B, each of the guide members 18 is formed in a rectangular plate shape whose longitudinal direction is substantially the vehicle vertical direction when viewed from the side of the vehicle, and the base end portion 28 side is the roof side rail 14 side. The inner panel 14A is fastened to the inner panel 14A by fastening with bolts and nuts (not shown), and the intermediate portion 30 to the tip portion 32 in the vehicle up-down direction are bent along the outer surface of the rolled curtain airbag 16. Has been. In the extended state as shown in FIG. 4(A), the guide member 18 is configured such that a part of the base end portion 28 and the intermediate portion 30 is made of normal resin as an example, and the roof of the intermediate portion 30 is formed. From the portion corresponding to the lower end portion 34 of the side rail 14 to the tip portion 32, for example, a high-concentration suspension (dilatant fluid) in which fine powder such as resin beads is suspended at a high concentration or a dilatancy characteristic (speed dependence) is provided. It is made of resin or the like. Therefore, from the portion corresponding to the lower end portion 34 of the roof side rail 14 of the intermediate portion 30 of the guide member 18 to the tip portion 32, the increase rate of the shear stress (resistance to displacement) increases as the shear (displacement) speed increases. It is configured to be. That is, from the portion corresponding to the lower end portion 34 of the roof side rail 14 of the intermediate portion 30 of the guide member 18 to the front end portion 32, there is speed dependency in the ease of deformation, and for input at low speeds. While it is easily deformed, it is difficult to deform for high-speed input.

The airbag ECU is electrically connected to a side collision sensor (not shown) provided on the side of the vehicle. The side collision sensor includes, for example, a pressure sensor or an acceleration sensor (in-door sensor) arranged in the front side door and the rear side door, and an acceleration sensor (in-pillar sensor) arranged in the B pillar. It is configured to detect a side collision of a vehicle. When the side collision sensor outputs a detection value indicating a side collision to the airbag ECU, the airbag ECU determines that the side collision occurs and operates the inflator.

(Action/effect)
Next, the operation and effect of this embodiment will be described.

The operation and effect of the present embodiment will be described using the contrast ratio shown in FIG. It should be noted that the same components as those of the present embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 5, the roof side rail 14 of the vehicle 12 is provided with a curtain airbag device 100 including an inflator (not shown) and a curtain airbag 16. In this curtain airbag device 100, when the vehicle 12 collides sideways, the curtain airbag 16 inflates in a curtain shape between the roof side rail 14 forming a part of the vehicle side portion and an occupant D seated on a front seat (not shown). By being deployed, the head H of the occupant D is restrained.

By the way, when a collision load is input centering on the center pillar 38 of the vehicle 12 during a side collision, the roof side rail 14 is positioned outside the center pillar 38 in the vehicle front-rear direction, that is, on the front pillar 20 side and the rear pillar 22 side. Deforms to the outside in the width direction. Therefore, in the proportional configuration, when the curtain airbag 16 is deployed along the roof side rail 14, the curtain airbag 16 expands and deploys at the time of a side collision. 42 is tilted outward in the vehicle width direction in a plan view of the vehicle. Furthermore, the vehicle lower side of the lower end portion 34 of the roof side rail 14 of the curtain airbag 16 is displaced outward in the vehicle width direction (see the two-dot chain line in FIG. 4A), whereby the vehicle front side portion of the curtain airbag 16 is formed. 40 and the vehicle rear side portion 42 are inclined further outward in the vehicle width direction. That is, the inclination of the vehicle front side portion 40 and the vehicle rear side portion 42 of the curtain airbag 16 toward the outer side in the vehicle width direction becomes large. Therefore, when the head H of the occupant D comes into contact with the vehicle front side portion 40 and the vehicle rear side portion 42 of the curtain airbag 16, the rotational moment of the head H from the position indicated by the chain double-dashed line in the figure to the position indicated by the solid line. May occur and the head H may not be sufficiently protected.

On the other hand, in the present embodiment, as shown in FIG. 1, the curtain airbag 16 is housed along the roof side rail 14 and receives gas supply at the time of a side collision to receive the gas supply from the vehicle side portion and the seated occupant. It is expanded and deployed like a curtain between D and D. A guide member 18 is attached to the roof side rail 14. As shown in FIG. 4B, when the curtain airbag 16 is inflated and deployed, the guide member 18 is positioned such that the tip end portion 32 is located below the lower end portion 34 of the roof side rail 14 on the vehicle lower side and the curtain airbag 16 is not moved. Support from the outside in the vehicle width direction. Therefore, the tip end portion 32 of the guide member 18 can prevent the curtain airbag 16 from moving outward from the lower end portion 34 of the roof side rail 14 in the vehicle width direction when inflated and deployed.

Here, as shown in FIG. 1, the guide member 18 is provided outside the vehicle front-rear direction from a position corresponding to the seated occupant D on the roof side rail 14. Therefore, at the time of a side collision, the front pillar 20 side and the rear pillar 22 side of the roof side rail 14 are deformed outward from the position shown in FIG. 2(A) around the center pillar 38 as shown in FIG. 2(B). In this case, the vehicle front side portion 40 of the curtain airbag 16 is suppressed from moving from the lower end portion 34 of the roof side rail 14 to the vehicle width direction outside. That is, it is possible to reduce the angle of inclination of the portion of the vehicle front side portion 40 of the curtain airbag 16 that is inclined outward in the vehicle width direction in the vehicle plan view. Therefore, when the head H of the occupant D comes into contact with the curtain airbag 16, it is possible to suppress the occurrence of a rotational moment in the head H of the occupant D. As a result, the head H of the occupant D can be sufficiently protected in the case of a side collision of the vehicle.

The portion of the guide member 18 corresponding to the lower end portion 34 of the roof side rail 14 of the intermediate portion 30 and the tip portion 32 are made of a material having a dilatancy characteristic. Therefore, the guide member 18 can be normally folded together with the curtain airbag 16 and is less likely to be deformed in response to a high-speed input due to the inflation and expansion of the curtain airbag 16 when the curtain airbag 16 is inflated and deployed. Thus, the curtain airbag 16 can be supported so as not to be displaced outward in the vehicle width direction.

In addition, in the present embodiment, the guide member 18 is configured to be provided on the front pillar 20 side of the roof side rail 14, but not limited to this, the vehicle rear side from the head of the rear seat occupant (not shown), In other words, the roof side rail 14 may be provided on the rear pillar 22 side.

Further, although two guide members 18 are provided, the present invention is not limited to this, and one guide member 18 or three or more guide members 18 may be provided.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be carried out without departing from the gist of the present invention. Of course.

10 Curtain airbag device (curtain airbag device for vehicles)
14 Roof Side Rail 16 Curtain Airbag 18 Guide Member 32 Front End 34 Bottom End D Seated Occupant H Head

Claims (1)

A curtain airbag that is stored in a state of being rolled along the roof side rails and is inflated and expanded in a curtain shape between a vehicle side portion and a seated occupant by receiving gas supply at the time of a side collision,
On the outer surface of the curtain airbag, which is attached to the vehicle front-rear direction outer side from the position corresponding to the head of the seated occupant on the roof side rail, at least the tip end portion is made of a material having a dilatancy property, and is roll-folded. and bent along a guide member for supporting the curtain airbag the curtain airbag positioned the tip portion during inflation and deployment within the vehicle lower side from the lower end of the roof side rail from the vehicle width direction outside ,
Curtain airbag device for vehicle.