JP2001080451A - Mounting structure for side collision air bag sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently detect side collision even when a body rear side surface is collided with a pole. SOLUTION: A reinforcing panel 40 is arranged on the part 42A of a rear side door 42 which is a region between an upper rear door inner lock part 34 and the mounting bracket 38 of a lower impact beam 36 across a side collision air bag sensor 12 in a vehicle side view. The reinforcing panel 40 is arranged in the rear part of a door inner panel in the inside part of the rear side door 42. As a result, in the case that a body rear side surface such as a rear wheel house 20 is collided with a pole, the part 42A of the rear side door 42, which is reinforced by the reinforcing panel 40 is hardly deformed, therefore, the side collision air bag sensor 12 arranged in the vertical wall part of a rear wheel house outer is moved in a moment to an interior inner side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side collision airbag sensor mounting structure, and more particularly to a side collision airbag sensor mounting structure for detecting a side collision at the rear of a vehicle.

[0002]

2. Description of the Related Art Conventionally, an example of a mounting structure of a side collision airbag sensor applied to a vehicle such as an automobile is disclosed in
A structure disclosed in Japanese Patent Application No. 0-59119 is known.

[0003] As shown in FIG.
In the mounting structure of the side collision airbag sensor disclosed in JP-A-59119, the door hinge 72 of the center pillar 70 to which a load is easily applied even when the side of the vehicle body collides with the pole.
An airbag sensor 74 is provided inside the mounting portion 70A of the camera, and the operation of the airbag device is controlled based on a detection signal from the airbag sensor 74. That is, in the mounting structure of the side collision airbag sensor, for example, when the vehicle collides with the pole, the pole collides with the vehicle from diagonally forward to the front side door or the rocker thereunder. When the center pillar 70 moves to the vehicle interior side instantaneously when pressed by the pole and moves to the vehicle interior side, the acceleration generated in the airbag sensor 74 can be promptly detected.

[0004]

However, in a vehicle equipped with a head protection airbag device for front and rear seats, in order to surely protect an occupant sitting in a rear seat, the vehicle may collide with a pole. Even when the pole collides with the rear side door or the rocker below it from the vehicle diagonally forward, and when the pole collides with the quarter pillar from the vehicle diagonally forward, it is necessary to detect the side collision promptly. However, in these cases, since the position of the collision of the rear side surface of the vehicle body with the pole is far from the position of the airbag sensor 74 provided on the center pillar 70, the side collision detection by the airbag sensor 74 is performed. The time gets longer. As a configuration to improve this, it is considered to additionally set an airbag sensor near the rear wheel house inside the vehicle,
With such a configuration, the rear side door inner panel, side member outer panel, wheel house outer, etc., which are relatively low in rigidity, are easily deformed at the time of a pole side collision, so that the acceleration at the time of collision is reduced by air. It is difficult to quickly transmit the collision to the bag sensor, and it is difficult to efficiently detect a side collision.

The present invention has been made in view of the above-described circumstances, and has as its object to provide a side collision airbag sensor mounting structure capable of efficiently detecting a side collision even when the rear side of the vehicle body collides with a pole. .

[0006]

According to a first aspect of the present invention, there is provided a front and rear seat airbag device for protecting front and rear seat occupants in a side collision, and a side collision airbag sensor is provided in a rear wheel house inside the vehicle. The mounting structure of the side collision airbag sensor in the vehicle set in the vicinity is an area between the upper rear door inner lock portion and the lower impact beam mounting bracket sandwiching the airbag sensor in a side view of the vehicle. The rear side door is reinforced against crush deformation in the vehicle width direction.

Accordingly, the rear side door portion, which is a region between the upper rear door inner lock portion and the lower impact beam mounting bracket with the airbag sensor interposed therebetween when viewed from the side of the vehicle, is prevented from being crushed in the vehicle width direction. The reinforcement portion does not easily deform even when the rear side surface of the vehicle body collides with the pole. As a result, the acceleration at the time of collision can be quickly transmitted to the airbag sensor via the reinforcing portion. Therefore, a side collision of the rear side surface of the vehicle body with the pole can be detected early and reliably.
That is, even when the rear side surface of the vehicle body collides with the pole, the side collision can be detected efficiently.

According to the second aspect of the present invention, an airbag device for front and rear seats for protecting occupants of front and rear seats in a side collision is mounted,
In the mounting structure of the collision airbag sensor in a vehicle in which the side collision airbag sensor is set near the rear wheel house inside the vehicle, the upper rear door inner lock portion and the lower rear door sandwiching the airbag sensor in a side view of the vehicle. The vehicle is characterized in that a wheel arch portion on the vehicle body side, which is an area between the impact beam mounting bracket and the impact beam mounting bracket, is reinforced against crush deformation in the vehicle width direction.

Therefore, the wheel arch portion on the vehicle body side, which is an area between the upper rear door inner lock portion and the lower impact beam mounting bracket sandwiching the airbag sensor when viewed from the side of the vehicle, is crushed in the vehicle width direction. , So even if the rear side of the vehicle collides with the pole,
The reinforcing portion does not deform easily. As a result, the acceleration at the time of collision can be quickly transmitted to the airbag sensor via the reinforcing portion. Therefore, a side collision of the rear side surface of the vehicle body with the pole can be detected early and reliably. That is, even when the rear side of the vehicle body collides with the pole,
Side collision can be detected efficiently.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a mounting structure for a side collision airbag sensor according to the present invention will be described with reference to FIGS.

In the drawings, an arrow FR indicates a vehicle forward direction, an arrow UP indicates a vehicle upward direction, and an arrow IN indicates a vehicle width inside direction.

As shown in FIG. 5, an airbag device 10 according to the present embodiment includes front and rear airbag sensors 11 and 12 for detecting a side collision state, an inflator 14 for ejecting gas when activated, Airbag bag 1
6 as a main component. The front airbag sensor 11 is disposed near the lower end of each of the left and right center pillars (B pillars) 13, and detects a side collision state when a side collision load of a predetermined value or more acts on the vehicle body side. It is composed of an acceleration sensor for detecting. The rear airbag sensor 12 is disposed at a portion 18A near the rear wheel house 20 inside the vehicle in each of the left and right rear side door openings 18, and a side impact load of a predetermined value or more is applied to the rear side surface of the vehicle body. It is constituted by an acceleration sensor that detects a side collision state when actuated.

The inflator 14 is disposed near a connection between a front pillar (A pillar) 22 and an instrument panel 24, and is connected to the front and rear airbag sensors 11 and 12 described above. Therefore, when the front and rear airbag sensors 11 and 12 detect a side collision state, the inflator 14 is activated.

Further, a front end portion 16A of the airbag bag body 16 is provided.
Are arranged at the inflator arrangement position so that gas ejected from the inflator 14 flows in. The upper end edge of the intermediate portion 16B is arranged along the front pillar 22 and the roof side rail 26, and the rear end 16C is disposed near the lower part of the quarter pillar (C pillar) 28. That is, the airbag device 10 of the present embodiment is a head protection airbag device for front and rear seats that protects the occupants 19 and 21 of front and rear seats at the time of a side collision.

The airbag bag body 16 is folded in a bellows shape in a substantially vertical direction to be elongated, and then the front pillar garnish 29, the outer portion of the roof head lining 30 in the vehicle width direction, and the quarter pillar garnish 32. Is straddled.

As shown in FIG. 1, a portion of the rear side door 42 which is an area between the upper rear door inner lock portion 34 and the mounting bracket 38 of the lower impact beam 36 with the airbag sensor 12 interposed therebetween in a side view of the vehicle. A reinforcement panel 40 made of a metal panel such as iron is provided at 42A.

As shown in FIG. 2, the reinforcing panel 40 is disposed inside the rear side door 42 at the rear of the door inner panel 44.

As shown in FIG. 3, the reinforcing panel 40 includes:
The rear portion of the base portion 44A of the door inner panel 44, the rear side wall portion 4
4B and the rear step portion 44C, and are welded to the back surface (outside surface of the vehicle) of the door inner panel 44.

The rear wheel house 20 includes a rear wheel house outer 46 forming the vehicle outer side of the rear wheel house 20, a rear wheel house inner 48 forming the vehicle inner side of the rear wheel house 20, and a rear wheel house forming the side member outer. It is constituted by a unit 50. At a portion on the vehicle body side opposite to the portion 42A of the rear side door 42 where the reinforcing panel 40 is disposed, a flange 48A formed at the front end edge of the rear wheel house inner 48 is formed by a front edge portion of the rear wheel house outer 46. The rear wheel house portion 5 of the side member outer is joined between the rear wheel house outer 46 and the door inner panel 44.
0 intervenes.

The vertical wall 4 of the rear wheel house outer 46
At the front end of 6A, a wall 46B bent outward of the vehicle compartment is formed, and at the outer end in the vehicle width direction of the wall 46B, a flange 46C is formed toward the front. The flange 46C of the rear wheel house outer 46 is provided with a flange 5 formed at the front edge of the rear wheel house 50.
0A, and a flange 46 formed on the rear end edge of the rear wheel house outer 46 on the vehicle width direction inner side surface of the vehicle outer wall 50B of the rear wheel house 50.
D is joined. As a result, the rear wheel house portion 50 and the rear wheel house outer portion 46 of the side member outer form a wheel arch portion 52 having a closed sectional structure extending in the circumferential direction of the rear wheel house 20.

An airbag sensor 12 is fixed to the front side wall of the outer wall 46A of the rear wheel house outer 46 by fixing means such as screws, not shown. Front end vertical wall portion 50C of rear wheel house portion 50 substantially opposite to the mounting portion
And a gap 52 which is a part of the wheel arch 52.
A is formed.

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

In the mounting structure of the side airbag sensor of the present embodiment, the airbag sensor 12 is viewed from the side of the vehicle.
The reinforcing panel 4 is provided on a portion 42A of the rear side door 42 which is a region between the upper rear door inner lock portion 34 and the mounting bracket 38 of the lower impact beam 36 with the interposition therebetween.
0 is provided. As a result, as shown in FIG.
When the rear portion of the rear side door 42 or the rear side surface of the vehicle body such as the rear wheel house 20 collides with the pole 54, the portion 42A of the rear side door 42 reinforced by the reinforcing panel 40, specifically, the door inner panel 44 The wheel arch portion 52 formed by the rear side wall portion 44B and the rear wheel house portion 50 and the rear wheel house outer portion 46 of the side member outer located rearward is hardly crushed, that is, hardly deformed.

For this reason, when the rear side wall portion 44B and the wheel arch portion 52 of the door inner panel 44 are pressed by the pawl 54 in the vehicle interior direction (direction of arrow A in FIG. 4), the rear wheel house outer 46 The airbag sensor 12 disposed on the vertical wall portion 46A instantaneously moves toward the vehicle interior (the direction of arrow B in FIG. 2). As a result, as shown by the solid line in FIG. 6, the initial acceleration G1 generated in the airbag sensor 12 in the present embodiment is equal to the initial acceleration G2 when the reinforcing panel 40 shown by the two-dot chain line in FIG. 6 is not provided. It will be larger than that. Therefore, in the present embodiment, a side collision of the rear side surface of the vehicle body with the pole can be detected early and reliably. That is, even when the rear side surface of the vehicle body collides with the pole, the side collision can be detected efficiently.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are included in the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, in the present embodiment, the portion 4 of the rear side door 42 which is a region between the upper rear door inner lock portion 34 and the mounting bracket 38 of the lower impact beam 36 with the airbag sensor 12 interposed therebetween in a side view of the vehicle.
2A, the reinforcing panel 40 is provided, but instead of the reinforcing panel 40, as shown in FIGS. 7 and 8, the upper rear door inner lock portion 34 and the lower impact with the airbag sensor 12 interposed therebetween in a vehicle side view. By arranging a plurality of bulkheads 58 at intervals in the vertical direction in the wheel arch portion 52 on the vehicle body side which is an area between the beam 36 and the mounting bracket 38, the wheel arch portion 5
2 may be reinforced. Further, instead of the bulkhead 58, a wheel arch portion on the vehicle body side which is a region between the upper rear door inner lock portion 34 and the mounting bracket 38 of the lower impact beam 36 with the airbag sensor 12 interposed therebetween in a side view of the vehicle. As shown in FIG. 9, a foaming agent 60 such as hard urethane may be filled in the inside 52.

Further, in this embodiment, the head protection airbag device 10 for the front and rear seats is used as the airbag device for the front and rear seats. Alternatively, other airbag devices for front and rear seats such as a side airbag device provided in a side door or the like may be used.

[0027]

According to the first aspect of the present invention, the side collision airbag sensor mounting structure has an excellent effect that a side collision can be detected efficiently even when the rear side surface of the vehicle body collides with a pole. Having.

The mounting structure for a side collision airbag sensor according to the second aspect of the present invention has an excellent effect that a side collision can be detected efficiently even when the rear side surface of the vehicle body collides with a pole. .

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a part of a vehicle body to which a side collision airbag sensor mounting structure according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a rear part of a rear side door of a vehicle body to which a mounting structure for a side collision airbag sensor according to an embodiment of the present invention is applied.

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a cross-sectional view corresponding to FIG. 3 showing a body deformation state in a case where a side surface of the vehicle body collides with a pole in the mounting structure for a side collision airbag sensor according to one embodiment of the present invention.

FIG. 5 is a schematic side view showing a part of a vehicle body to which the mounting structure for a side collision airbag sensor according to an embodiment of the present invention is applied.

FIG. 6 is a graph showing a time change of an acceleration acting on the airbag sensor in the mounting structure of the side collision airbag sensor.

FIG. 7 is a schematic side view showing a wheel arch portion of a vehicle body to which a side collision airbag sensor mounting structure according to another embodiment of the present invention is applied.

FIG. 8 is an enlarged sectional view taken along line 8-8 in FIG. 7;

FIG. 9 is a cross-sectional view corresponding to FIG. 8 of a vehicle body to which a side collision airbag sensor mounting structure according to another embodiment of the present invention is applied.

FIG. 10 is a perspective view showing a mounting structure of a conventional side collision airbag sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Airbag apparatus 12 Airbag sensor 18 Rear side door opening 20 Rear wheel house 34 Rear door inner lock part 38 Impact beam mounting bracket 40 Reinforcement panel 42 Rear side door 44 Door inner panel 46 Rear wheel house outer 48 Rear wheel house inner 50 Side Rear wheel house 52 of member outer 52 Wheel arch 58 Bulkhead 60 Foaming agent

Claims (2)

[Claims] 1. A side collision airbag sensor in a vehicle having a front and rear seat airbag device for protecting front and rear seat occupants during a side collision, wherein the side collision airbag sensor is set near a rear wheel house inside the vehicle. In the mounting structure, the rear side door portion which is a region between the upper rear door inner lock portion and the lower impact beam mounting bracket sandwiching the airbag sensor in a vehicle side view,
A side collision airbag sensor mounting structure reinforced against crush deformation in the vehicle width direction. 2. A front and rear seat airbag device for protecting front and rear seat occupants during a side collision, wherein the side collision airbag sensor is provided near a rear wheel house inside the vehicle. In the mounting structure, the vehicle body side wheel arch portion, which is a region between the upper rear door inner lock portion and the lower impact beam mounting bracket sandwiching the airbag sensor in a vehicle side view, is crushed in the vehicle width direction. A mounting structure of a side collision airbag sensor characterized by being reinforced.