JP2018094928A - Curtain airbag device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform protection of a head part of a passenger sufficiently when side crash of a vehicle happens.SOLUTION: A guide member 18 mounted to a roof side rail 14 supports a curtain airbag 16 from outside of the width direction of the vehicle by a tip end part 32 positioning on more downward side of the vehicle than the roof side rail 14 when the curtain airbag 16 is inflated and deployed. In addition, the guide member 18 is provided from a position corresponding to a seating passenger D in the roof side rail 14 on the outside of the front and rear direction of vehicle. Accordingly, a vehicle front side part 40 in the curtain airbag 16 is suppressed from moving from the roof side rail 14 to the outside of the width direction of the vehicle. That is to say, a portion of the vehicle front side part 40 in the curtain airbag 16 can reduce an inclination angle when inclining to the outside of the width direction of the vehicle at a vehicle plane view. Consequently, a rotation moment can be suppressed from being generated on a head part H of the passenger D when the head part H of the passenger D comes into contact with the curtain airbag 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a curtain airbag device for a vehicle.

  Patent Document 1 listed below discloses a curtain airbag device for a vehicle. The curtain airbag device for a vehicle is provided on a roof side rail, and the curtain airbag is inflated and deployed in a curtain shape between a vehicle side portion and a seated occupant at the time of a side collision of the vehicle. Is restrained.

JP 2012-35696 A

  By the way, when a collision load is inputted around the center pillar of the vehicle at the time of a side collision, the outer side in the vehicle front-rear direction is deformed outward in the vehicle width direction around the center pillar. Therefore, in the configuration disclosed in Patent Document 1, since the curtain airbag is deployed along the roof side rail, the curtain airbag that is inflated and deployed at the time of a side collision is such that the outer side portion of the curtain airbag in the vehicle front-rear direction is the vehicle plane. Tilt outward in the vehicle width direction. Further, the vehicle lower side from the lower end of the roof side rail in the curtain airbag is displaced from the vehicle width direction outer side, so that the vehicle front-rear direction outer side portion of the curtain airbag is further inclined toward the vehicle width direction outer side. That is, the inclination of the curtain airbag in the vehicle longitudinal direction outer side to the vehicle width direction outer side is increased. For this reason, when a passenger | crew's head contacts the vehicle front-back direction outer side part of a curtain airbag, a rotational moment will arise in a passenger | crew's head and there exists a possibility that a passenger | crew's head cannot fully be protected. Therefore, the above prior art has room for improvement in this respect.

  In consideration of the above-described facts, an object of the present invention is to provide a curtain air bag device for a vehicle that can sufficiently protect an occupant's head during a side collision of the vehicle.

  The curtain airbag device for a vehicle according to the first aspect of the present invention is accommodated along the roof side rail, and is inflated and deployed in a curtain shape between the vehicle side portion and the seated occupant upon receiving a gas supply at the time of a side collision. The curtain airbag is attached to the outside in the vehicle front-rear direction from a position corresponding to the head of the seated occupant on the roof side rail, and the front end portion is lower than the lower end portion of the roof side rail when the curtain airbag is inflated and deployed. A guide member that is positioned on the vehicle lower side and supports the curtain 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 is inflated and deployed in a curtain shape between the vehicle side portion and the seated occupant upon receipt of gas supply at the time of a side collision. Is done. A guide member is attached to the roof side rail. The guide member supports the curtain airbag from the outside in the vehicle width direction with the tip end portion positioned on the vehicle lower side from the lower end portion of the roof side rail when the curtain airbag is inflated and deployed. Therefore, when the curtain airbag is inflated and deployed, the leading end of the guide member can suppress the curtain airbag from moving from the lower end of the roof side rail to the outside in the vehicle width direction.

  Here, the guide member is provided on the outer side in the vehicle front-rear direction from a position corresponding to the seated occupant on the roof side rail. Therefore, when the vehicle front-rear direction outer side of the roof side rail is deformed outward in the vehicle width direction around the center pillar at the time of a side collision, the vehicle front-rear direction outer side is the lower end of the roof side rail from the head of the seated occupant in the curtain airbag. To the outside in the vehicle width direction is suppressed. That is, it is possible to reduce the angle of the inclination when the portion of the curtain airbag located on the outer side in the vehicle front-rear direction from the seated occupant's head tilts outward in the vehicle width direction in the vehicle plan view. Therefore, it is possible to suppress the occurrence of a rotational moment on the occupant's head when the occupant's head contacts the curtain airbag.

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

It is a perspective view which shows the state which looked at the side surface of the vehicle which has the curtain airbag apparatus for vehicles which concerns on one Embodiment toward the vehicle front side from the vehicle rear side. (A) is sectional drawing which shows the state which looked at the vehicle side part in the normal time of the vehicle which has the curtain airbag apparatus for vehicles which concerns on one Embodiment from the vehicle upper side, (B) is with respect to (A) It is sectional drawing which shows the state of the vehicle side part at the time of a side collision. (A) is an expanded sectional view which shows the state which cut | disconnected the curtain airbag of the normal time in FIG. 1 along the AA line, (B) is the curtain airbag and guide member of a normal time from a vehicle rear side. It is a perspective view which shows the state seen toward the vehicle front side. (A) is an enlarged sectional view corresponding to FIG. 3 (A) showing the curtain airbag at the time of inflation and deployment, and (B) corresponds to FIG. 3 (B) 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 a comparison.

  Hereinafter, an embodiment of a curtain airbag device for a vehicle (hereinafter referred to as “curtain airbag device”) 10 according to the present invention will be described with reference to FIGS. In these figures, the arrow FR indicates the front side in the vehicle longitudinal direction, the arrow OUT indicates the vehicle width direction outside, and the arrow UP indicates the vehicle vertical direction upper side. Since the curtain airbag device 10 according to the present embodiment is basically symmetrical (symmetric with respect to the vehicle longitudinal direction line passing through the middle in the vehicle width direction), the vehicle width direction in FIG. One side (the left side of the vehicle) is illustrated, and the following description will be mainly described on the one side in the vehicle width direction.

  As shown in FIG. 1, a curtain airbag device 10 is provided on the inner side in the vehicle width direction of a roof side rail 14 constituting a part of the vehicle side portion of the vehicle 12. The curtain airbag device 10 includes an inflator (not shown) that generates gas at the time of a side collision, a curtain airbag 16 that is connected to the inflator and inflates and deploys when supplied with gas from the inflator, and a vehicle width of the curtain airbag 16. And a guide member 18 provided on the outer side in the direction.

  The inflator is formed in a substantially cylindrical shape whose longitudinal direction is the vehicle front-rear direction, and is disposed 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 operated under the control of the airbag ECU.

  The curtain airbag 16 is rolled inward in the vehicle width direction (see FIG. 3A) and folded in a long shape with the vehicle longitudinal direction as the longitudinal direction, and the front pillar 20 and the roof side rail of the vehicle 12 are folded. 14 and the inner side of the rear pillar 22. The curtain airbag 16 is configured as a rectangular cloth-like member having a size capable of covering both the front seat side window 24 and the rear seat side window 25 in a side view of the vehicle. More specifically, the curtain airbag 16 includes a gas introduction portion (not shown) into which the tip side of the inflator is inserted, and a gas supply (not shown) that extends linearly in the vehicle front-rear direction along the upper edge of the curtain airbag 16. A curtain airbag main body portion 26 provided corresponding to the front seat and the rear seat is provided on the road and the vehicle lower side of the gas introduction portion. The curtain airbag main body 26 has a plurality of fixings extended to the upper side of the vehicle so as to be fixed to an inner panel 14A constituting the roof side rail 14 via a base end portion 28 of a guide member 18 described later. A portion 27 is formed.

  A plurality (two in this embodiment) of guide members 18 are provided on the front pillar 20 side of the roof side rail 14 with a space in the vehicle front-rear direction. As shown in FIG. 3 (B), each guide member 18 is formed in a rectangular plate shape with the vehicle vertical direction as a longitudinal direction when viewed from the side of the vehicle, and the base end portion 28 side is the roof side rail 14. Are fixed by being fastened to the inner panel 14A by bolts and nuts (not shown), and the end portion 32 from the intermediate portion 30 in the vehicle vertical direction is bent along the outer surface of the roll-folded curtain airbag 16. It has been. In the extended state as shown in FIG. 4A, the guide member 18 is configured such that a part of the base end portion 28 and the intermediate portion 30 is made of ordinary resin as an example, and the roof of the intermediate portion 30 From the portion corresponding to the lower end 34 of the side rail 14 to the tip 32, for example, a high concentration suspension (dilatant fluid) or dilatancy characteristics (speed dependence) in which fine powders such as resin beads are suspended at a high concentration. It is comprised by the resin etc. which have. Therefore, the rate of increase in shear stress (resistance to displacement) increases as the shear (displacement) speed increases from the portion of the guide member 18 corresponding to the lower end 34 of the roof side rail 14 to the tip end portion 32. It is set as the composition. 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 tip end portion 32, the ease of deformation is speed-dependent, and for input at a low speed. While easily deforming, 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) disposed in the front side door and the rear side door, and an acceleration sensor (in-pillar sensor) disposed in the B pillar. It is comprised and it is the structure which detects the side collision of a vehicle. When a detection value indicating a side collision is output from the side collision sensor to the airbag ECU, the airbag ECU is determined to be a side collision and the inflator is activated.

(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 proportionality shown in FIG. In addition, about the same component as this embodiment, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 5, the roof side rail 14 of the vehicle 12 is provided with a curtain airbag device 100 configured to include an inflator (not shown) and a curtain airbag 16. In the curtain airbag device 100, the curtain airbag 16 inflates in a curtain shape between the roof side rail 14 constituting a part of the vehicle side portion and the occupant D seated on a front seat (not shown) at the time of a side collision of the vehicle 12. By unfolding, the head H of the occupant D is restrained.

  By the way, when a collision load is input about the center pillar 38 of the vehicle 12 at the time of a side collision, the roof side rail 14 is centered on the center pillar 38 and the vehicle front-rear direction outer side, that is, the front pillar 20 side and the rear pillar 22 side are the vehicle. Deforms outward in the width direction. Accordingly, in the proportional configuration, when the curtain airbag 16 is deployed along the roof side rail 14, the vehicle front side portion 40 and the vehicle rear side portion as the vehicle longitudinal direction outer side portion of the curtain airbag 16 that is inflated and deployed at the time of a side collision. 42 is inclined outward in the vehicle width direction in a vehicle plan view. Further, the vehicle lower side of the curtain airbag 16 with respect to the lower end portion 34 of the roof side rail 14 is displaced from the vehicle width direction outer side (see the two-dot chain line in FIG. 4A). 40 and the vehicle rear side portion 42 are further tilted 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 outside in the vehicle width direction is increased. For this reason, when the head H of the occupant D comes into contact with the vehicle front side 40 or the vehicle rear side 42 of the curtain airbag 16, the rotational moment of the head H from the position shown by the two-dot chain line in the figure to the position shown by the solid line. May occur, and the head H may not be sufficiently protected.

  On the other hand, in this embodiment, as shown in FIG. 1, the curtain airbag 16 is housed along the roof side rail 14 and receives a supply of gas at the time of a side collision to receive the vehicle side portion and the seated occupant. It is inflated and deployed in the form of a curtain between D. A guide member 18 is attached to the roof side rail 14. As shown in FIG. 4B, the guide member 18 has the tip 32 positioned on the vehicle lower side than the lower end 34 of the roof side rail 14 when the curtain airbag 16 is inflated and deployed. Support from the outside in the vehicle width direction. Therefore, the leading end portion 32 of the guide member 18 can suppress the curtain airbag 16 from moving outward in the vehicle width direction from the lower end portion 34 of the roof side rail 14 during inflation and deployment.

  Here, as shown in FIG. 1, the guide member 18 is provided on the outer side in 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 from the position shown in FIG. 2 (A) to the outside in the vehicle width direction 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 prevented from moving outward from the lower end portion 34 of the roof side rail 14 in the vehicle width direction. That is, the inclination angle when the vehicle front side portion 40 of the curtain airbag 16 is inclined outward in the vehicle width direction in the vehicle plan view can be reduced. Therefore, when the head H of the occupant D comes into contact with the curtain airbag 16, it is possible to suppress the generation of a rotational moment on the head H of the occupant D. Thereby, the passenger | crew's D head H can fully be protected at the time of the side collision of a vehicle.

  Further, 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 to the tip end portion 32 is made of a material having dilatancy characteristics. Therefore, the guide member 18 can be folded together with the curtain airbag 16 in a normal state, and when the curtain airbag 16 is inflated and deployed, it is difficult to be deformed in response to high-speed input due to the inflation and deployment of the curtain airbag 16. Thus, the curtain airbag 16 can be supported so as not to be displaced outward in the vehicle width direction.

  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 is not limited to this, the vehicle rear side from the head of a 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.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above, and various modifications other than those described above can be implemented without departing from the spirit of the present invention. Of course.

10 Curtain airbag device (Vehicle curtain airbag device)
14 Roof side rail 16 Curtain airbag 18 Guide member 32 Front end 34 Lower end D Seated occupant H Head

Claims (1)

A curtain airbag that is housed along the roof side rail and receives a gas supply at the time of a side collision and is inflated and deployed in a curtain shape between the vehicle side and the seated occupant;
The roof side rail is attached to the outside in the vehicle front-rear direction from a position corresponding to the head of the seated occupant, and the front end portion is located below the lower end portion of the roof side rail when the curtain airbag is inflated and deployed. A guide member for supporting the curtain airbag from the outside in the vehicle width direction,
A curtain airbag device for a vehicle having