JP2001171478A - Side collision air bag sensor fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently detect a side collision in either case of a wheel house side member or a rocker side member coming into side collision with a pole. SOLUTION: When a rear part of a rocker 24 or a rear side door comes into side collision with a pole, load is instantaneously transmitted to a sensor body 51 through a fixed point of a sensor bracket 50 set to the rear end of a flange 30A of a rocker inner rear 30 and the flange 32A of a rocker outer rear 32. When a rear wheel house 26 comes into side collision with a pole, load is instantaneously transmitted to the sensor body 51 through the fixed point of the sensor bracket 50 set to a flange 40A of a wheel house inner 40 and a flange 42A of a wheel house outer 42.

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 Japanese Patent No. 9119, the airbag sensor 74 is provided inside the mounting portion 70A of the door hinge 72 in the center pillar 70 to which a load is easily applied even when the vehicle body side collisions with the pole. The operation of the airbag device is controlled based on a detection signal from the airbag sensor 74. That is, in this side collision airbag sensor mounting structure, for example, when the vehicle collides with the pole, the pole collides with the vehicle from the diagonally forward to the front side door or the lower side rocker, When these are pressed by the poles and instantaneously move toward the vehicle interior, the acceleration generated in the airbag sensor 74 can be quickly detected by the movement of the center pillar 70 toward the vehicle interior.

[0004]

However, in a vehicle equipped with at least a rear seat airbag device, a rear side door and a rocker below the rear side door are provided in order to reliably protect an occupant sitting in the rear seat. It is necessary to detect the side collision promptly when the vehicle strikes the pole, and when the quarter pillar and the wheel house part collide with the pole.However, in these cases, the side Since the side collision position is separated from the position of the airbag sensor 74 provided on the center pillar 70, the side collision detection time by the airbag sensor 74 becomes longer. As a configuration to improve this, it is considered to additionally set an airbag sensor near the rear wheel house inside the vehicle,
In such a configuration, when a member on the rocker side having high rigidity collides with the pole, the side collision can be detected effectively, but the wheel house having relatively low rigidity is provided with a pole. When a side collision occurs, the wheel house is easily deformed, so that it is difficult to quickly transmit the acceleration at the side collision to the airbag sensor, and it is difficult to detect the side collision efficiently.

The present invention has been made in consideration of the above-described facts, and a side collision airbag sensor capable of efficiently detecting a side collision regardless of which of a wheel house side member and a rocker side member collides with a pole. The purpose is to obtain a mounting structure.

[0006]

According to the present invention, there is provided a side collision airbag sensor mounting structure for a vehicle equipped with a rear seat airbag device for protecting at least a rear occupant during a side collision. Wherein at least one of the fixed points of the sensor is fixed to a member on the wheel house side, and at least another of the fixed points of the sensor is fixed to a member on the rocker side. .

Therefore, when a member on the rocker side collides with the pole, the acceleration at the time of the side collision can be quickly transmitted to the sensor via a fixing point with the member on the rocker side. For this reason, the side collision of the member on the rocker side with the pawl can be detected early and reliably. On the other hand, when a member on the rear wheel house side collides with the pole, acceleration at the time of a side collision can be quickly transmitted to the sensor via a fixed point with the member on the wheel house side. For this reason, the side collision of the member on the wheel house side with respect to the pole can be detected early and reliably. As a result, the side collision can be efficiently detected even when either the wheel house side member or the rocker side member collides with the pole.

According to a second aspect of the present invention, in the mounting structure of the side collision airbag sensor according to the first aspect, a connecting flange between the wheel house inner panel and the wheel house outer panel, a rocker inner reinforcement and a rocker outer reinforcement. Each fixing point of the sensor is set on an inner side surface in a vehicle width direction of a joint flange with the sensor.

Therefore, in addition to the contents described in the first aspect, the sensor is hardly affected by the outside of the vehicle body, and the replacement work of the sensor is easy.

[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. 3, an airbag device 10 according to the present embodiment includes sensors 12 and 14 for detecting a side collision state, an inflator 16 for ejecting gas by operating, an airbag bag body. 18 as a main component. The front sensors 12 are disposed near the lower ends of the left and right center pillars (B pillars) 20, respectively, and are used to detect 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 sensors. The rear sensor 14 is provided at the joint between the rocker 24 and the rear wheel house 26 in the left and right rear side door openings 18, so that when a side impact load of a predetermined value or more acts on the side of the vehicle body. It is constituted by an acceleration sensor for detecting a side collision state.

As shown in FIG. 1, the rear portion of the rocker 24 is constituted by a rocker inner rear 30 and a rocker outer rear 32, and has a closed cross-sectional structure extending in the vehicle longitudinal direction.

As shown in FIG. 2, the rocker inner rear 30
A flange 30A formed on the upper part of the rocker outer rear 32 is joined to a flange 32A formed on the upper part of the rocker outer rear 32, and a sensor mounting hole 34 is formed in the rear end of the flanges 30A and 32A. A weld nut 36 is coaxially fixed to the sensor mounting hole 34 on the outer side surface of the flange 30 </ b> A in the rocker inner rear 30 in the vehicle width direction. Note that a flange 30B is formed at the rear edge of the rocker inner rear 30, and a flange 32A is also formed at the rear edge of the rocker outer rear 32.

The rear wheel house 26 is composed of a wheel house inner 40 and a wheel house outer 42, and forms a wheel accommodating portion 43 extending in an arch shape. A flange 42A formed at the vehicle width direction inner end of the wheel house outer 42 is joined to an upper front end of a flange 40A formed at the vehicle width direction outer end of the wheel house inner 40. At the front end of the flange 40A of the wheel house inner 40, a sensor mounting hole 44 is formed. The sensor mounting hole 44 is also formed at the flange 42A of the wheel house outer 42. Flange 42A in wheel house outer 42
A weld nut 46 is coaxially fixed to the sensor mounting hole 44 on the outer surface in the vehicle width direction. The upper end edge of the flange 30B of the rocker inner rear 30 is joined to the front lower end edge 40B of the wheel house inner 40, and the flange 32A of the rocker outer rear 32 is formed.
Are joined to a front lower portion 42B of the wheel house outer 42.

The sensor 14 includes a long rigid plate-shaped sensor bracket 50 and a sensor bracket 5.
And a sensor main body 51 fixed to a substantially central portion of the control unit 0, and is connected to a control circuit by a harness (not shown). A mounting hole 52 is formed in the front end of the sensor bracket 50, and a mounting hole 54 is formed in the rear end of the sensor bracket 50. These mounting holes 5
Bolts 56 and 58 are inserted into the mounting holes 52 and 54 from the inside in the vehicle width direction. The bolts 56 inserted into the mounting holes 52 are attached to the sensor mounting holes 34 formed in the rocker 24.
And is screwed to the weld nut 36. The bolt 58 inserted into the mounting hole 54 is screwed into the weld nut 46 through the sensor mounting hole 44 formed in the rear wheel house 26.

As shown in FIG. 3, the front end portion 18A of the airbag bag 18 is disposed at the inflator arrangement position so that the gas ejected from the inflator 16 flows in. The upper edge is arranged along the front pillar 60 and the roof side rail 62,
The rear end portion 18C is arranged near the lower part of the quarter pillar (C pillar) 64. That is, the airbag body 18 of the airbag device 10 of the present embodiment protects the occupants 66 and 68 in the front and rear seats at the time of a side collision, as shown by the two-dot chain line in FIG.

The airbag bag 18 is folded in a bellows shape in a substantially vertical direction to be elongated, and is straddled over the front pillar garnish, the outer portion of the roof head lining in the vehicle width direction, and the quarter pillar garnish. Is housed.

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 rear side door as a member on the rocker side or the rear portion of the rocker 24 collides with the pole, the rocker 24 moves in the vehicle interior direction. Is pressed. At this time, the flange 30A of the rocker inner rear 30 and the rocker outer
The load is instantaneously transmitted to the sensor bracket 50 and the sensor main body 51 via the fixing point of the sensor bracket 50 set at the rear end of the second flange 32A. As a result,
The acceleration at the time of the side collision can be quickly transmitted to the sensor main body 51 via the fixing point of the sensor bracket 50 with the member on the rocker side. For this reason, the side collision of the member on the rocker side with the pawl can be detected early and reliably.

On the other hand, when the rear wheel house 26 as a member on the side of the wheel house collides with the pole, the wheel house inner 40 and the wheel house outer 42 are easily crushed, and the rocker 24 quickly accelerates the acceleration. Although it is difficult to surely transmit the sensor bracket 50, in the present embodiment, the sensor bracket 50 and the sensor body 51 are fixed via the fixing points of the sensor bracket 50 set on the flange 40A of the wheel house inner 40 and the flange 42A of the wheel house outer 42.
The load is transmitted instantaneously. As a result, the side collision of the wheel house side member with the pole can be detected early and reliably.

Therefore, in the mounting structure of the side collision airbag sensor according to the present embodiment, the side collision can be efficiently detected regardless of which of the wheel house side member and the rocker side member collides with the pole. Can be.

In this embodiment, the sensor bracket 50 is fixed to the inner side surface (inside of the vehicle interior) of the rocker 24 and the rear wheel house 26 in the vehicle width direction. The replacement work of 14 is also easy.

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 sensor bracket 50
Is a long plate, and the front end of the sensor bracket 50 is fixed to the rocker 24 at one point, and the rear end of the sensor bracket 50 is fixed to the rear wheel house 26 at one point.
The shape of the sensor bracket 50 and the number of fixing points are not limited thereto. For example, the sensor bracket 50 has a triangular plate shape and a plurality of fixing points on the rear wheel house 26 side which are easily deformed and hard to transmit acceleration. Another configuration such as a configuration may be used.

In this embodiment, the fixing point of the sensor bracket 50 on the rocker 24 side is changed to the rocker inner rear 30.
30A and the flange 3 of the rocker outer rear 32
2A, the fixing point of the sensor bracket 50 on the rocker 24 side is not limited to this part, but may be other parts, for example, a flange 30B formed on the rear end edge of the rocker inner rear 30. Alternatively, it may be set at another part such as a flange 32A formed at the rear end edge of the rocker outer rear 32.

In this embodiment, the fixed point of the sensor bracket 50 on the rear wheel house 26 side is set at the front end of the joint between the flange 40A of the wheel house inner 40 and the flange 42A of the wheel house outer 42. , Rear wheel house 26 of sensor bracket 50
The fixing point on the side is not limited to this portion, and other portions, for example, the front lower edge 40B of the wheel house inner 40,
It may be set at another portion such as the front lower portion 42B of the wheel house outer 42.

Further, in this embodiment, the head protection airbag device 10 for the front and rear seats is used, but the head protection airbag device 10 for the front and rear seats is replaced with a side seat provided on a seat, a side door or the like. Another rear seat airbag device such as an airbag device may be used.

[0028]

According to the first aspect of the present invention, the side collision airbag sensor mounting structure of the present invention can reduce the side collision regardless of which of the wheel house side member and the rocker side member collides with the pole. It has an excellent effect that detection can be performed well.

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 can be easily replaced. Has an excellent effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mounting structure of a side collision airbag sensor according to an embodiment of the present invention, as viewed from the front inward in the vehicle width direction.

FIG. 2 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 the front inward in the vehicle width direction.

FIG. 3 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. 4 is a perspective view showing a mounting structure of a conventional side collision airbag sensor.

[Explanation of symbols]

Reference Signs List 10 airbag device 14 sensor 16 inflator 18 airbag bag 24 rocker (member on rocker side) 26 rear wheel house (member on wheelhouse side) 30 rocker inner rear (member on rocker side) 30A flange of rocker inner rear 32 rocker outer rear (Rocker side member) 32A Rocker outer rear flange 34 Sensor mounting hole 40 Wheel house inner (wheel house side member) 40A Wheel house inner flange 42 Wheel house outer (wheel house side member) 42A Wheel house outer flange 44 Sensor Mounting hole 50 Sensor bracket 51 Sensor body 52 Mounting hole for sensor bracket 54 Mounting hole for sensor bracket

Claims (2)

[Claims] 1. A mounting structure for a side collision airbag sensor of a vehicle equipped with a rear seat airbag device for protecting at least a rear seat occupant during a side collision, wherein at least one of the fixing points of the sensor is a wheel. A side-collision airbag sensor mounting structure, being fixed to a house-side member, wherein at least one of the fixing points of the sensor is fixed to a rocker-side member. 2. The fixing point of each of the sensors is set on an inner side surface in a vehicle width direction of a joint flange between a wheel house inner panel and a wheel house outer panel and a joint flange between a rocker inner reinforcement and a rocker outer reinforcement. The mounting structure for a side collision airbag sensor according to claim 1, wherein: