JP2012153332A - Curtain airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain airbag device that can maintain, while preventing slotting of the curtain airbag developed the inflation at a side impact into between the pillar garnish and the vehicle body side part pillar, the distance to the vehicle body side by curving the bracket attachment surface standing between the ceiling member and the curtain airbag by the shock outside the vehicle at the side impact.SOLUTION: The bag body 12 is arranged to span a car interior side pillar 5, while a bracket 1 with the concavo-convex parts 1a and 1b having contact with the bag body 12 and placed via a crevice on the ceiling member 3 is arranged between the bag body 12 and the ceiling member 3 on the upper side UP of the car interior side pillar 5.

Description

  In the present invention, for example, the side surface of the own vehicle and another vehicle collide, or the side surface of the own vehicle collides with a facility such as a guard rail (hereinafter referred to as “side”, whether it is an active collision or a passive collision). The present invention relates to a curtain airbag device that protects the head of an occupant of the own vehicle at the time of a collision.

  In the conventional curtain airbag device, a bead extending in the front-rear direction has a curtain airbag body body side pillar (generally referred to as a center pillar, B pillar, or 2nd pillar) and the vehicle body side section. This prevents the bead from entering the space between the pillar garnish that covers the pillar from the indoor side, and when the occupant is restrained, the bead can be a starting point of bending toward the outside of the vehicle to ensure an impact absorbing effect (preceding) Technical Reference 1) Or the extension portion of the airbag is rotated using the deploying force of the airbag, and the pillar garnish front end portion is engaged with the opening provided in the extension portion so that the side pillar of the vehicle body What is known as the prior art is that which can prevent entry into the space between the garnish and the pillar garnish (prior art document 2).

JP 2010-083418 A JP 2008-049874 A

  However, since this prior art document 1 does not deal with an impact from the outside of the vehicle at the time of a side collision, there is a risk of deformation in accordance with the curvature of the bracket mounting surface on the vehicle body side. In addition, since the prior art document 2 has a complicated structure and there is a risk that the manufacturing cost may rise, it does not cope with the impact from the outside of the vehicle at the time of a side collision, so it deforms to the inside of the vehicle and rotates the bracket. May have an effect.

  In order to solve the above-mentioned problems, the present invention is directed to a ceiling by an impact from the outside of a vehicle at the time of a side collision while preventing a curtain airbag inflated and deployed at the time of a side collision from entering between the pillar garnish and the vehicle body side pillar. The present invention provides a curtain airbag device in which a bracket attachment surface interposed between a member and a curtain airbag is curved so that the distance from the vehicle body attachment surface can be maintained.

  In order to solve the above-mentioned problem, the curtain airbag device according to claim 1 of the present invention has a bag shape along the ceiling member, the upper end portion is supported by the ceiling member, and the portion excluding the upper portion is formed. A bag body that is normally wound, and a bag body that is communicated with the upper portion of the bag body and filled with gas in the event of a side collision to unwind the bag body and curtain the entire bag body The bag main body is arranged so as to straddle the vehicle interior side pillar, and the bag main body and the ceiling member above the vehicle inner side pillar. A bracket having an uneven portion that is in contact with the bag main body and is disposed on the ceiling member through a gap is disposed between the brackets.

  The curtain airbag device according to claim 2 of the present invention is characterized in that the uneven portion of the bracket according to claim 1 has a substantially trapezoidal shape when viewed from the front.

  Further, in the curtain airbag device according to claim 3 of the present invention, the surface portion on the vehicle inner side of the bracket according to claim 1 or 2 is inclined in a direction away from the vehicle inner side in a state of being attached to the vehicle body. It is characterized by becoming.

  According to invention of Claim 1, the said bag main body is distribute | arranged so that the vehicle inside part pillar may be straddled, and the said bag between the said bag main body and the said ceiling member above the said vehicle inside part pillar. Since the bracket having a concavo-convex portion that is in contact with the main body and disposed on the ceiling member via a gap is disposed, the concavo-convex portion provided on the bracket at the time of a side collision is not deformed by the vehicle. Even if it does not reach, the bracket is pressed against the vehicle body by the input from the bag body, and there is an effect that no gap is generated between the bracket surface and the fitting member that covers the interior side pillar of the vehicle interior side pillar.

  According to the second aspect of the present invention, the uneven portion of the bracket is characterized in that the shape of the front view is substantially trapezoidal, so that it can be adapted to various collision modes of side collision.

  According to a third aspect of the present invention, the surface portion of the bracket on the vehicle interior side is inclined in a direction away from the vehicle interior when attached to the vehicle body. Serves as a spacer between the vehicle body and the bag body, and the distance from the bracket surface to the fitting member can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS The side view of the curtain airbag apparatus which shows the state which removed the armoring member from the indoor side part of the motor vehicle based on Example 1 of this invention, and the wound bag main body. The perspective view of the bracket of FIG. Sectional drawing which shows the relationship between the bag main body formed by the bracket and winding, and the rigging member in the cross section which cut the principal part of FIG. 1 horizontally. FIG. 4 is a cross-sectional view corresponding to FIG. 3 in a side collision.

  Hereinafter, embodiments of the present invention will be described in detail. In the present invention, immediately after the start of the inflation, the vertical inflation is performed first, while the curtain airbag that is inflated and deployed during the vertical inflation side collision is prevented from entering between the pillar garnish and the vehicle body side pillar. Provided is a curtain airbag device in which a bracket mounting surface interposed between a ceiling member and a curtain airbag is curved by an impact from outside the vehicle at the time of a side collision so that the distance from the vehicle body mounting surface can be maintained. The bag body is formed in a bag shape along the ceiling member, the upper end portion is supported on the ceiling member, and the portion other than the upper portion is normally wound, and the bag body communicates with the upper portion of the bag body. And a gas generator capable of unwinding the bag body by filling the bag body with gas at the time of a side collision and deploying the entire bag body in a curtain shape The bag body is disposed so as to straddle the vehicle interior side pillar, and is in contact with the bag body between the bag body and the ceiling member on the upper side of the vehicle interior part pillar and on the ceiling member This was realized by arranging a bracket having an uneven portion arranged through a gap. Embodiments of the present invention will be described below with reference to the drawings.

  A structure according to the first embodiment of the present invention will be described with reference to FIGS. The automobile shown in FIG. 1 has a center pillar (also called a B pillar or 2nd pillar) 5 and a rear pillar (also called a C pillar or 3rd pillar) 4 corresponding to an “inner side pillar” disposed on the side of the vehicle. And a ceiling member. The ceiling member includes a side roof rail 3 whose side portions are continuously arranged from the front side FR to the rear side RR, a rear roof rail 15 in which the rear side RR of the side roof rail 3 is arranged in the left-right direction, and the side roof rail. 3 and the roof panel 14 covering the upper side UP of each of the rear roof rails 15. Of course, there are other constituent members of the automobile than these members.

  A bracket 1 is attached to the side roof rail 3 with bolts 11 and nuts 17. The bracket 1 is formed by alternately forming concave portions 1b disposed on the side roof rail 3 through a gap and convex portions 1a protruding inward from the position of the concave portion 1b in the longitudinal direction. In this embodiment, there are four convex portions 1a and three concave portions 1b. Attachment portions 1c and 1c are formed at the front and rear end portions at positions in contact with the side roof rail 3, respectively. Through holes 10 for the bolts 11 are formed in the mounting portions 1c and 1c. The convex portion 1a and the concave portion 1b are each formed in a substantially trapezoidal shape in a front view shown in FIG.

  Reference numeral 2 denotes a curtain airbag device, in which a bag body 12 is arranged so as to straddle the center pillar 5, is unfolded in a curtain shape, hangs down, and is a head of an occupant (not shown) seated on the front seat 18. Can be protected. That is, when the bag body 12 is not filled with gas, it is wound as shown in FIG. The seat back 6 of the front seat 18 shown in FIG. 1 is in a state of being tilted to the front side FR so that the center pillar 5 can be easily seen, and reference numeral 7 is supported on the upper end of the seat back 6 via a stay 8. It is a headrest.

  The curtain airbag device 2 includes a sensor (not shown) that detects sudden braking or the like close to a side collision, a gas generator 13 that can eject gas by a signal indicating that the sensor has detected, And a bag body 12 that can be inflated and deployed by the gas ejected from the gas generator 13. In a state where the gas is not sealed (referred to as normal), a portion except the upper portion of the bag body 12 is wound, and as shown in FIG. 1, a cloth that can be broken when a predetermined tension is applied to the bracket 1. It is held by tape 9.

  The bag body 12 has a bag shape along the side roof rail 3, and the gas generator 13 provided on the rear pillar 4 and the rear end portion of the bag body 12 flow in the gas from the gas generator 13. It is communicated by a possible pipe 19. The gas that has flowed into the bag body 12 can be guided in the front FR direction, and when the gas is filled, the winding is released and the gas can be inflated and deployed in a curtain shape.

  Next, the operation of the first embodiment will be described.

  The bag body 12 is arranged so as to straddle the center pillar 5, is in contact with the upper part of the bag body 12 at the upper side UP of the center pillar 5, and has a convex portion via a gap with the side roof rail 3. Since the bracket 1 having alternately the la and the concave portion 1b is disposed, the convex portion 1a and the concave portion 1b provided on the bracket 1 due to the impact load F applied from the outside to the center pillar 5 at the time of a side collision Even if the deformation of the center pillar does not reach, the bracket 1 is pressed against the side roof rail 3 which is the vehicle body by the input from the bag body 12, and the center pillar is a “fitting member” which covers the bracket 1 and the center pillar 5 from the indoor side. There is an effect that a gap is not generated between the garnish molding 16 and the like.

  Moreover, since the convex part 1a and the recessed part 1b of the bracket 1 have a substantially trapezoidal shape when viewed from the front, they can be adapted to various collision modes of side collision. That is, as shown in FIG. 2, the convex portion 1a widens the upper bottom, the concave portion 1b narrows the upper bottom, and the surfaces connecting the convex portion 1a and the concave portion 1b in the vehicle width direction are inclined to each other. Therefore, one surface (either the indoor facing surface of the convex portion 1a, the vehicle facing surface of the concave portion 1b, or the inclined facing surface inclined) is positive with respect to an impact load from a certain angle. However, since any other surface has an oblique relationship, all the surfaces are facing directly or directly at the same time with respect to the impact load from a specific direction (the direction of the load and the surface). In the same direction), and good crushing deformation is possible for collision loads from various angles.

  Further, the surface portion on the vehicle inner side of the bracket 1, that is, the convex portion 1 a is inclined in a direction away from the vehicle inner side in the attached state to the side roof rail 3 that is a “ceiling member”. The bracket 1 serves as a spacer between the side roof rail 3 and the bag body 12, and the distance from the bracket 1 surface to the center pillar garnish molding 16 can be suppressed.

  In the above embodiment, the bag body 12 wound in a state where gas is not sealed has been described as being supported by the side roof rail 3 at the normal time. It may be supported by the roof panel 14 or the door sash.

DESCRIPTION OF SYMBOLS 1 Bracket 1a Convex part of bracket 1b Concave part of bracket 2 Curtain airbag device 3 Side roof rail (ceiling member)
5 Center pillar (pillar inside the car)
12 Bag body 14 Roof panel (ceiling member)
15 Rear roof rail (ceiling member)
16 Center pillar garnish molding (fitting)
LWR Lower side

Claims (3)

A bag body which is formed in a bag shape along the ceiling member and has an upper end supported by the ceiling member, and a portion other than the upper part is normally wound, and a bag body which communicates with the upper portion of the bag body and in a side collision In a curtain airbag device comprising a gas generator capable of unwinding the bag body by filling the bag body with gas and deploying the entire bag body in a curtain shape,
The bag main body is arranged so as to straddle the vehicle inner side pillar, and is in contact with the bag main body and between the bag main body and the ceiling member above the vehicle inner side pillar and has a gap in the ceiling member. A curtain airbag device comprising a bracket having a concavo-convex portion disposed therebetween. The curtain airbag device according to claim 1,
The curtain airbag device according to claim 1, wherein the uneven portion of the bracket has a substantially trapezoidal shape when viewed from the front. The curtain airbag device according to claim 1 or 2,
The curtain airbag device according to claim 1, wherein a surface portion of the bracket on the vehicle inner side is inclined in a direction away from the vehicle inner side in a state of being attached to the vehicle body.

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