JP2000255376A - Attaching structure of air bag sensor for side-on collision - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently detect side-on collision even in a case where a pole collides with a rear tire and the pole collides with a body rear side surface. SOLUTION: A sensor 12 is fixed to an opening flange 40C of a rocker inner extension 40 in a quarter wheel house connection range 20A of a rocker 20. When a pole collides with a rear tire, a rear chassis pulls the sensor 12 together with the rocker inner extension 40 toward the inside of a compartment. When the pole collides with the body side part, a crash zone is set on the upper wall part 40B of the rocker inner extension 40 by a clearance L between the opening flange 40C and the upper wall part 52B of a rear side member front 52, and the sensor 12 is instantaneously moved to the compartment inside.

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 No. 9119, the airbag sensor 74 is provided inside the mounting portion 70A of the door hinge 72 in the center pillar 70 where a load is easily applied even when the pole collides with the side of the vehicle. 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 pole collides with the front side door or the rocker therebelow from diagonally forward of the vehicle, when these are pressed by the pole and instantaneously move to the vehicle interior side. In addition, the lateral G generated by the side collision can be quickly detected by moving the center pillar 70 toward the vehicle interior.

[0004]

However, in a vehicle equipped with a head-protecting airbag device for front and rear seats, a pole is provided at a rear side of the vehicle from diagonally forward in order to reliably protect an occupant sitting in a rear seat. Side collisions must be detected promptly in the event of a collision with a door or a rocker below it, or a collision of a pole with a quarter pillar diagonally from the front of the vehicle. And the position of the airbag sensor 74 disposed on the center pillar 70 are far from each other, so that it is difficult to detect the side collision efficiently. Also, when the pole collides with the rear tire, even if a large lateral G acts on the rear of the vehicle body, the rear side door and the rocker thereunder do not instantly move to the vehicle interior. It is difficult to efficiently detect a side collision with the airbag sensor 74 provided on the center pillar 70.

In view of the above facts, the present invention provides a side collision airbag sensor that can efficiently detect a side collision even when the pole collides with the rear tire and when the pole collides with the rear side surface of the vehicle body. The purpose is to get the structure.

[0006]

According to a first aspect of the present invention, there is provided a mounting structure of a side collision airbag sensor of a vehicle equipped with front and rear seat airbag devices for protecting front and rear seat occupants in a side collision. The sensor is disposed in the quarter wheel house joint area behind the rocker at the rear side door opening.

Therefore, since the sensor is arranged in the quarter wheel house joint area behind the rocker at the rear side door opening close to the rear tire, even when the pole collides with the rear tire and when the pole collides with the rear side surface of the vehicle body. The side collision can be efficiently detected by the sensor.

According to a second aspect of the present invention, there is provided a mounting structure for a side collision airbag sensor according to the first aspect, wherein the sensor is mounted on a side surface of a vehicle interior of an open nimb flange of a rocker inner, and the upper and lower surfaces of the rocker inner are mounted. A predetermined clearance is set between the front end face of the rear side member connected from the indoor side and the opening flange.

Therefore, when the pole collides with the rear side of the vehicle body such as the rear side door or the rocker at the opening of the rear side door, a crash zone is set on the upper wall of the rocker by the clearance, and the sensor is mounted on the vehicle. It moves instantly to the indoor side. As a result, the side collision of the pole to the rear side surface of the vehicle body can be detected early and reliably, that is, efficiently. On the other hand, when the pole collides with the rear tire, the rear chassis supporting the rear tire pulls the rocker inner toward the vehicle interior via the rear side member.
The opening flange opens inward in the vehicle width direction, and the sensor instantaneously moves to the vehicle interior side. As a result, the lateral G of the entire vehicle body can be detected by the sensor, so that the side collision of the pole with the rear tire can be detected early and reliably, that is, efficiently. In addition, since the sensor is attached to the side of the interior of the open nimb flange of the rocker inner, the sensor is not easily affected by the outside of the vehicle body, and the sensor can be easily replaced.

[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 apparatus 10 according to the present embodiment includes sensors 11 and 12 for detecting a side collision state, an inflator 14 for ejecting gas when activated, an airbag bag body. 16 as a main component. The front sensor 11 is provided near the lower end of the center pillar (B-pillar) 13 and is an acceleration sensor that detects a side collision state when a side collision load of a predetermined value or more acts on the vehicle body side. It is configured. Further, the rear sensor 12 is connected to the quarter wheel house connection area 20A behind the rocker 20 at the rear side door opening 18, and preferably the rear tire 6
4 (point P1 in FIG. 5) and the center of the rocker 20 at the rear of the center pillar connection (point P2 in FIG. 5). Is formed by an acceleration sensor that detects a side collision state when acting on the vehicle.

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 sensors 11 and 12 described above. Therefore, when the sensors 11 and 12 detect the side collision state, the inflator 14 operates.

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 26, the outer side 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, in a quarter wheel house connecting area 20A behind the rocker 20, a rocker having a hat-shaped cross section in which an opening constituting the outer side in the vehicle width direction of the rocker 20 is directed inward in the vehicle width direction. A closed cross section 42 having a rectangular cross section extending in the vehicle front-rear direction by an outer reinforcement 38 and a rocker inner extension 40 having a hat-shaped cross section in which an opening forming an inner portion in the vehicle width direction of the rocker 20 faces outward in the vehicle width direction. Are formed. Specifically, an upper wall portion 38B is formed on the upper end portion of the vertical wall portion 38A of the rocker outer reinforcement 38 toward the inside in the vehicle width direction, and an inner end portion of the upper wall portion 38B in the vehicle width direction. Has a flange portion 38C formed upward. Rocka Outer Reinforcement 38
A lower wall portion 38D is formed substantially inward in the vehicle width direction at the lower end of the vertical wall portion 38A, and a lower flange portion 38E is formed at an inner end in the vehicle width direction of the lower wall portion 38D. Are formed. On the other hand, Rocka Inner Extension 4
An upper wall portion 40B is formed at the upper end of the vertical wall portion 40A toward the outside in the vehicle width direction, and an opening flange 40C is formed at the outer end portion of the upper wall portion 40B in the vehicle width direction. Are formed. Opening flange 40C
A slope 40D is formed at the upper end portion of the vehicle toward the upper side outside the vehicle width, and a flange portion 40E is formed at an outer end in the vehicle width direction of the slope portion 40D toward the upper side. The flange portion 40E is welded to an upper portion of the flange portion 38C of the rocker outer reinforcement 38. The vertical wall 40A of the rocker inner extension 40 is also provided.
A lower wall portion 40F is formed at the lower end portion toward the outside in the vehicle width direction, and a flange portion 40G is formed at an outer end portion in the vehicle width direction of the upper wall portion 40F toward the lower side. The flange portion 40G is welded to the flange portion 38E of the rocker outer reinforcement 38. A gap 44 is formed between the opening flange 40C of the rocker inner extension 40 and the flange 38C of the rocker outer reinforcement 38.

A sensor bracket 46 is fixed to the opening flange 40C of the rocker inner extension 40. The cross-sectional shape of the sensor bracket 46 as viewed from the front and rear of the vehicle is L-shaped, and the vertical wall portion 46A is fixed to the opening flange 40C by a fixing means such as a bolt (not shown). ) Is fixed. At the lower end of the vertical wall portion 46A of the sensor bracket 46, a sensor mounting portion 46B is formed inward in the vehicle width direction, and the sensor 12 is not shown with screws or the like on the upper surface of the sensor mounting portion 46B. Is fixed by the fixing means. Note that the sensor mounting portion 46B of the sensor bracket 46 has the rocker inner extension 4
0 is separated from the upper wall 40B.

As shown in FIG. 4, the front portion 40H of the rocker inner extension 40 is
8 is connected to the rear end portion 48A, and the rear portion 40J of the rocker inner extension 40 is connected to the quarter wheel house inner 50. A rear side member front 52 is disposed substantially inward in the vehicle width direction of the rocker inner extension 40 in the vehicle width direction.

As shown in FIG. 1, the rear side member front 52 has a U-shape with an opening directed outward in the vehicle width direction, and a rectangular closed cross section extending in the vehicle longitudinal direction with the rocker inner extension 40. A portion 54 is formed. Specifically, an upper wall portion 52B is formed at an upper end portion of the vertical wall portion 52A of the rear side member front 52 toward the outside in the vehicle width direction, and an outer end portion of the upper wall portion 52B in the vehicle width direction is formed. Is welded to the inside of the upper wall portion 40B of the rocker inner extension 40 in the vehicle width direction. Therefore, a clearance L is formed between the opening flange 40C of the rocker inner extension 40 and the upper wall portion 52B of the rear side member front 52. Also, the vertical wall 52 of the rear side member front 52
A lower wall portion 52C is formed at a lower end portion of the lower wall portion A toward the outside in the vehicle width direction, and an inner end portion of the lower wall portion 52C in the vehicle width direction is formed as a lower wall portion 40F of the rocker inner extension 40.
Is welded to the outside in the vehicle width direction. Reference numeral 56 in FIG. 1 indicates a rocker portion of the side member.

As shown in FIG. 4, a rear sub-frame front mount bracket 58 and a rear sub-frame rear mount bracket 60 are disposed on the rear side member front 52 at positions spaced apart in the front-rear direction.
A front mount 62A and a rear mount 62B of a rear subframe 62 constituting a rear chassis are connected to the rear subframe front mount bracket 58 and the rear subframe rear mount bracket 60. A rear tire 64 is supported on the rear sub-frame 62 by a known structure, and a rear side member rear 66 is connected to a rear end of the rear side member front 52. Note that reference numeral 68 in FIG.
Indicates a center floor, and reference numeral 70 indicates a rear floor.

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

In the mounting structure of the side collision airbag sensor according to the present embodiment, when the pole collides with the rear side of the vehicle body such as the rocker 20 or the quarter pillar 28 of the rear side door or the rear side door opening 18, the rocker outer reinforcement is used. Mention 38 is in the vehicle interior side direction (direction of arrow A in FIG. 2)
, And the closed section 42 is compressed and deformed. At this time, the opening flange 40C of the rocker inner extension 40 and the upper wall 5
2B, a crash zone is set in a portion of the upper wall portion 40B of the rocker inner extension 40 corresponding to the clearance L, and this portion is located in the vehicle width direction. Compression deformation. Therefore, together with the opening flange 40C of the rocker inner extension 40, the sensor 12 instantaneously moves toward the vehicle interior (the direction of arrow G in FIG. 2). As a result,
A side collision of the pole to the rear side surface of the vehicle body can be detected early and reliably, that is, efficiently.

On the other hand, when the pole collides with the rear tire 64, the rear sub-frame 62 is connected to the rocker inner extension 40 via the rear side member front 52.
Is pulled toward the vehicle interior (in the direction of arrow B in FIG. 1), a gap 44 is opened, and the sensor 12 instantaneously moves toward the vehicle interior (in the direction of arrow G in FIG. 3) together with the opening flange 40C of the rocker inner extension 40. As a result, the lateral G of the entire vehicle body can be detected by the sensor 12, so that the side collision of the pole with the rear tire can be detected early and reliably, that is, efficiently.

In the present embodiment, the sensor 12 is fixed to the inner side surface (the side surface in the vehicle interior) of the opening flange 40C of the rocker inner extension 40 via the sensor bracket 46. In addition to being less affected, it is easy to replace the sensor.

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 gap 44 is formed only in the upper part of the rocker 20, but instead, as shown in FIG. 6, at the outer end in the vehicle width direction of the lower wall part 40F of the rocker inner extension 40, By forming the opening flange 40K downward, and forming the inclined portion 40L downward at the lower end of the opening flange 40K toward the outside of the vehicle width, a gap 72 is also formed at the lower portion of the rocker 20. Sensor 1 in case of collision
A configuration in which the movement of No. 2 is improved may be adopted. Further, in the present 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.
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.

[0026]

The side collision airbag sensor mounting structure according to the first aspect of the present invention efficiently detects a side collision even when the pole collides with the rear tire and when the pole collides with the rear side surface of the vehicle body. It has an excellent effect that it can be performed.

According to the second aspect of the present invention, in addition to the effect of the first aspect, in addition to the effect of the first aspect, the sensor is hardly affected by the outside of the vehicle body, and the sensor replacement operation is easy. Has an excellent effect.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view taken along line 1-1 of FIG.

FIG. 2 is a cross-sectional view corresponding to FIG. 1, showing a body deformation state when a pole collides with a vehicle body side portion in a side collision airbag sensor mounting structure according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view corresponding to FIG. 1 showing a body deformation state when a pole collides with a rear tire in the mounting structure for a side collision airbag sensor according to one embodiment of the present invention.

FIG. 4 is an exploded perspective view showing the mounting structure of the side collision airbag sensor according to the embodiment of the present invention, as viewed from inside the vehicle diagonally forward.

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

FIG. 6 is a cross-sectional view corresponding to FIG. 1, showing a mounting structure of a side collision airbag sensor according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a mounting structure of a conventional side collision airbag sensor.

[Explanation of symbols]

Reference Signs List 10 airbag device 12 sensor 18 rear side door opening 20 rocker 20A quarter wheel house connecting area of rocker 38 rocker outer reinforcement 40 rocker inner extension 40C rocker inner extension opening flange 44 gap 46 sensor bracket 48 rocker inner panel 50 quarter wheel House inner 52 Rear side member front 58 Rear subframe front mount bracket 60 Rear subframe rear mount bracket 62 Rear subframe (rear chassis) 64 Rear tire

Claims (2)

[Claims] In a mounting structure of a side collision airbag sensor of a vehicle equipped with front and rear seat airbag devices for protecting front and rear seat occupants during a side collision, the sensor is mounted in a quarter wheel house behind a rocker at a rear side door opening. A mounting structure for a side collision airbag sensor, wherein the mounting structure is arranged in a joint area. 2. The sensor according to claim 1, wherein the sensor is mounted on a side surface of a cabin of an opening flange of the rocker inner, and a predetermined clearance is set between a front end surface of a rear side member connected to the upper and lower surfaces of the rocker inner from the cabin side and the opening flange. The mounting structure for a side collision airbag sensor according to claim 1, wherein: