JP2002178870A - Arrangement structure of head protecting air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reconcile the stabilization of the expanding direction of an air bag body and the absorbing performance of an impact. SOLUTION: A guide wall 61B of a jump board 61 receives a large downward force by the expanding pressure of an air bag body 16. An energy absorbing rib 61D riding over from a lower surface 61C of the guide wall 61A to a lower part 61E of the base 61B works as a reinforcing member. Even if a head of an occupant abuts on the jump board 61 when colliding, the energy absorbing rib 61 formed in the lower surface 61C of the guide wall 61B and the guide wall D61B are easily deformed to buffer an impact to be applied to the head of the occupant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of a head protection airbag device arranged on an automobile body, and more particularly to a deployment assist having a guide wall extending toward an upper end portion of a pillar garnish on a roof side rail. The present invention relates to an arrangement structure of a head protection airbag device in which members are set.

[0002]

2. Description of the Related Art Conventionally, an example of an arrangement structure of a head protection airbag device arranged on an automobile body has been proposed in Japanese Patent Application Laid-Open No. 11-91490.

[0003] In such an arrangement structure of the head protection airbag device, the airbag bag body, which is covered with the roof head lining in a folded state, deploys the roof head lining into the vehicle interior with the deployment force. It spreads into the cabin through the gap between the roof head lining and the body. For this reason, in such an arrangement structure of the head protection airbag device, a part of the airbag body at the time of deployment is, for example,
A guide wall extending toward the upper end of the B-pillar garnish on the roof side rail side so as not to get into the gap between the upper end of the B-pillar garnish and the pillar inner panel as a body or to be caught by the upper end of the B-pillar garnish. A metal deployment assisting member is provided.

[0004]

However, as described above, in the configuration in which the metal deployment assisting member having the guide wall extending toward the upper end portion of the B pillar garnish is provided on the roof side rail side, the deployment assisting member is provided. It is necessary to set the guide wall at a strength that does not easily deform due to the deployment force of the airbag body, and to stabilize the deployment direction of the airbag body (hereinafter referred to as "stabilization of the airbag body deployment direction"). It is. On the other hand, it is necessary to effectively absorb the impact load by deforming the guide wall against the impact load from the vehicle interior side. However, this impact absorption performance and the stability of the deployment direction of the airbag body are required. It is difficult to achieve both.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide an arrangement structure of a head protection airbag device capable of achieving both stability in the direction of deployment of an airbag body and shock absorbing performance.

[0006]

According to the present invention, there is provided a head protection airbag apparatus comprising a roof side rail having a deployment assisting member having a guide wall extending toward an upper end of a pillar garnish. In the arrangement structure,
An energy absorbing means is provided on a lower surface of the guide wall of the deployment assisting member, which functions to reinforce the guide wall when the airbag bag is deployed, and to reduce the impact when the occupant's head collides.

Accordingly, the guide wall receives a large downward force due to the deployment pressure of the airbag bag body. However, since the energy absorbing means functions as a reinforcing member, it is possible to suppress the guide wall from being deformed downward, and to stabilize the guide wall. The deployment performance of the airbag bag body thus obtained is obtained. Even if the occupant's head comes into contact with the deployment assisting member, the impact on the occupant's head can be reduced by easily deforming the guide wall together with the energy absorbing means formed on the lower surface of the guide wall. As a result, both stabilization of the deployment direction of the airbag body and shock absorbing performance can be achieved.

According to a second aspect of the present invention, in the arrangement structure of the head protection airbag device according to the first aspect, the deployment assisting member is made of resin, and has a cross-sectional shape of substantially T when viewed from the front and rear direction of the vehicle body. The energy absorbing means is an energy absorbing rib integrally formed on the lower surface of the guide wall.

Therefore, in addition to the contents described in claim 1,
Since the unfolding assisting member is made of a resin integrally molded product, it is easy to manufacture the unfolding assisting member, and the plate thickness of the energy absorbing rib can be set to a minimum thickness that can obtain the reinforcing effect of the guide wall. It is possible.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an arrangement structure of a head protection airbag bag 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. 4, the head protection airbag device 10 includes a sensor 12 for detecting a side collision state,
The main components are a cylindrical inflator 14 that ejects gas when activated, and an airbag bag 16. The sensor 12 is disposed near the lower end of the center pillar (B pillar) 18 and detects a side collision state when a side collision load of a predetermined value or more acts on the vehicle body side.

The inflator 14 is disposed near the upper part of the quarter pillar (C pillar) 20 and is connected to the sensor 12 described above. Therefore, when the sensor 12 detects the side collision state, the inflator 14 is operated.

A front end fixing point P1 of the airbag bag 16 is provided at an intermediate portion in the vertical direction of the airbag bag 16 in a side view.
A plurality of non-inflating portions 24 are formed at predetermined intervals across the tension line T connecting the rear end fixing point P2 and the longitudinal direction of the airbag body. A plurality of substantially parallel inflatable portions crossing the tension line T are formed when the bag bag is deployed.

Further, a rear end portion 16A of the airbag 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 roof side rail 28, and the front portion 16C is a front pillar ( A pillar) 30
Are arranged along.

The airbag bag body 16 is folded in a bellows shape in a substantially vertical direction to be elongated, and then the quarter pillar garnish 21, the outer side portion 42A of the roof head lining 42 in the vehicle width direction, and the front pillar garnish. 26 and is accommodated.

As shown in FIG. 3, the roof side rail 28 has a substantially outer hat-shaped rail outer panel 48 which projects relatively outwardly from the passenger compartment, and slightly projects inward of the rail outer panel 48. A rail inner panel 40 and a rail reinforcement 49 formed in a substantially hat shape in cross section along the rail outer panel 48 and sandwiched between the rail outer panel 48 and the rail inner panel 40 are provided. Both ends of the rail outer panel 48, the rail inner panel 40, and the rail reinforcement 49 are joined by welding to form a closed cross section. The upper end of the roof side rail 28 composed of the three members is joined to the outer end of the roof panel 46 in the vehicle width direction by welding, and the lower end of the roof side rail 28 has an opening weather strip. 53 are fitted.

The airbag bag 16 is folded in the case 50 in a direction substantially perpendicular to the side surface 39A of the vehicle interior of the door glass 39 (the direction of arrow K in FIG. 3).
Is stored between the rail inner panel 40 and the roof head lining 42. When the airbag body 16 is deployed, the case 50 has a corner 50 </ b> A at the lower end on the outer side in the vehicle width direction due to the deployment and inflation force of the airbag body 16.
However, the lid 50B is opened from the V-notch formed inside the case 50 to the interior of the vehicle with respect to the base 50C.

The upper wall 50D of the lid 50B of the case 50 and the upper wall 50E of the base 50C are arranged in parallel with the upper end 16D of the airbag body 16 interposed therebetween. In the upper wall 50D and the upper wall 50E of the case 50,
Through holes are drilled respectively, and these through holes,
A bolt 44 penetrating through the mounting hole of the upper end portion 16D of the airbag bag body 16, and a nut 46 screwed into the bolt 44
As a result, the case 50 is fixed together with the airbag bag body 16 to the side of the rail inner panel 40 in the cabin.

The roof head lining 42 is made of resin,
When the airbag body 16 is deployed, the outer part 42A of the roof head lining 42 in the vehicle width direction is formed by the inflation force of the airbag body 16 when the airbag body 16 is deployed. As shown by the two-dot chain line in FIG. 3, the airbag bag 16 opens into the vehicle interior, and the airbag body 16 is deployed into the vehicle interior through this gap. Note that reference numeral 6 shown in FIG.
4 is a shock absorbing material.

Further, as shown in FIG. 1, when the airbag bag is deployed, a roof formed below the lid portion 50B of the case 50 above the center pillar 18 due to the inflation pressure of the airbag bag 16. Headlining 4
The engagement portion between the center pillar garnish 51 and the upper end 51A of the center pillar garnish 51 is pushed and spread as shown by a two-dot chain line, and the airbag bag body 16 is deployed into the vehicle cabin from the pushed gap.

The center pillar garnish 51 is made of resin, and is composed of a base material and a skin.
B is erected. A clip 70 is locked to the top of the pedestal 51B, and the clip 70 is fixed to a mounting hole 57 formed in the rail inner panel 40. Reference numeral 62 shown in FIG. 2 is a slide plate.

As shown in FIG. 4, a jump table 61 as a deployment assisting member is provided in a region facing the center in the front-rear direction of the folded airbag body 16.
The jump table 61 has a center pillar garnish 51.
Of the center pillar 18 on the inflator 14 side of the center pillar 18 on the roof side rail 28, preferably in the present embodiment, from the position overlapping with the assist grip or card holder attached to the rear side in the present embodiment. It is arranged in a region reaching the upper end 51A.

As shown in FIG. 1, the jump table 61 is made of resin, and has a substantially T-shaped cross section when viewed from the vehicle front-rear direction. Specifically, the guide wall 61A of the jump stand 61 is set up at a substantially right angle from the vertical middle part of the base 61B extending diagonally up and down along the rail inner panel 40 toward the vehicle interior. An energy absorbing rib 61D as energy absorbing means is integrally formed on a lower surface 61C of the guide wall 61A.

As shown in FIG. 2, the energy absorbing ribs 61D of the jumping pedestal 61 are formed at both ends in the longitudinal direction of the jumping pedestal 61 and at predetermined positions along the longitudinal direction of the vehicle at the middle part in the longitudinal direction. Each energy absorbing rib 61D is provided between the lower surface 61C of the guide wall 61A and the base 6C.
It has a triangular shape straddling the lower portion 61E of 1B.

Therefore, the energy absorbing ribs 61D function to reinforce the guide walls 61A when the airbag bag is deployed, and to reduce the impact when the head 72A of the occupant 72 collides.

As shown in FIG. 2, mounting holes 63 are formed in the upper portion 61F of the base 61B of the jump stand 61 at predetermined intervals along the longitudinal direction of the vehicle body.

As shown in FIG. 1, the jump table 61 is
The airbag body 16 and the case 50 are fastened together with the airbag body 16 and the case 50 to the side of the rail inner panel 40 together with a bolt 44 penetrating the mounting hole 63 and a nut 46 screwed to the bolt 44.

Therefore, when the airbag body is deployed, the airbag body 16 is inflated in the vehicle interior side direction (the direction of the arrow A in FIGS. 1 and 3) along the guide wall 61A of the jump stand 61. Has become.

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

In this embodiment, when a side impact load of a predetermined value or more is applied to the side of the vehicle body, the sensor 1 detects that a side collision has occurred.
2 detected. For this reason, the inflator 14 operates and a predetermined amount of gas is ejected. As a result, the airbag body 16 starts to inflate, and the inflated airbag body 16 pushes and opens the quarter pillar garnish 21, the vehicle width direction outer portion 42A of the roof head lining 42 and the front pillar garnish 26 together with the case 50. The swelling bulges below the roof side rail 28 from the vehicle rear side toward the vehicle front side.

At this time, from the time when the deployment of the airbag bag body 16 reaches a position near the rear side of the center pillar 18 in the vehicle, and the time when the airbag bag body 16 reaches a position past the middle part of the center pillar 18 in the vehicle longitudinal direction, the airbag bag body 16 is opened. Is directed along the guide wall 61A of the jump stand 61 toward the vehicle interior (arrow A in FIGS. 1 and 3).
Direction). For this reason, it is possible to prevent the airbag bag 16 from contacting or catching on the upper end 51A of the center pillar garnish 51.

In the present embodiment, the airbag 1
6, the guide wall 61 of the jump table 61
Although A receives a large downward force, the energy absorbing rib 61D straddling the lower surface 61C of the guide wall 61A and the lower portion 61E of the base 61B functions as a reinforcing member. For this reason, it is possible to suppress the guide wall 61A from being deformed downward by the deployment pressure of the airbag bag body 16, and stable deployment performance of the airbag bag body 16 is obtained.

Even if the head 72A of the occupant 72 comes into contact with the jump table 61, the lower surface 61C
The guide wall 61A is easily deformed (crushed) together with the energy absorbing rib 61D formed in the above, so that the impact of the occupant head 72A can be reduced.

As a result, in the present embodiment, it is possible to achieve both the stabilization of the airbag body in the deployment direction and the shock absorbing performance.

Further, in this embodiment, since the jump base 61 is an integrally molded product made of resin, the manufacture of the jump base 61 is easy, and the plate thickness of the energy absorbing rib 61D is reduced by the reinforcing effect of the guide wall 61A. It is possible to set the minimum thickness obtained.

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 within the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, in each of the embodiments, the structure in which the folded airbag body 16 is accommodated in the case 50 is adopted. However, the case 50 is not necessarily required, and the folded airbag body 16 is easily ruptured by a wrapping material. May be partially wrapped, or partially temporarily fixed using a tape-shaped hook-and-loop fastener, so that the shape of the airbag body 16 is held in a folded state.

The structure for arranging the head protection airbag bag of the present invention is also applicable to an airbag device in which an inflator is arranged on the front side of a vehicle, for example, on a front pillar (A pillar) 30. The jump stand 61 is disposed in an area facing the upper end 51A of the center pillar garnish 51, preferably in an area from a position on the roof side rail 28 in front of the center pillar 18 to the upper end 51A of the center pillar garnish 51. Set up.

Further, in the above embodiment, the jump table 61
The cross-sectional shape of the vehicle as viewed from the front-rear direction is substantially T-shaped.
The cross-sectional shape of the jump stand 61 as viewed from the vehicle front-rear direction is not limited to this, and may be another shape. In the above embodiment, the energy absorbing rib 61D is connected to the guide wall 61.
Although the triangular shape straddles the lower surface 61C of A and the lower portion 61E of the base 61B, the cross-sectional shape of the energy absorbing rib 61D is not limited to this and may be another shape.

[0040]

According to the first aspect of the present invention, there is provided an arrangement structure of a head protection airbag device in which a deployment auxiliary member having a guide wall extending toward an upper end portion of a pillar garnish is provided on a roof side rail. An energy absorbing means is provided on the lower surface of the guide wall of the deployment assisting member to reinforce the guide wall when the airbag bag is deployed, and to reduce the impact in the event of an occupant head collision, so that the deployment direction of the airbag bag is stabilized. And excellent impact absorption performance.

According to a second aspect of the present invention, in the arrangement structure of the head protection airbag device according to the first aspect, the deployment assisting member is made of resin and has a substantially T-shaped cross-sectional shape as viewed from the vehicle longitudinal direction. And the energy absorbing means is an energy absorbing rib integrally formed on the lower surface of the guide wall,
In addition to the effects described in the first aspect, there is an excellent effect that manufacturing is easy and the plate thickness can be reduced by the reinforcing effect of the energy absorbing ribs.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a jump table of the head protection airbag device according to one embodiment of the present invention.

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

FIG. 4 is a side view showing the arrangement structure of the head protection airbag device according to the embodiment of the present invention, as viewed from the inside of the vehicle.

[Explanation of symbols]

Reference Signs List 10 Head protection airbag device 12 Sensor 14 Inflator 16 Airbag bag 18 Center pillar 20 Quarter pillar 28 Roof side rail 51 Center pillar garnish 51A Upper end of center pillar garnish 61 Jumping table (deployment assisting member) 61A Guide for jumping table Wall 61B Base of jump table 61C Lower surface of guide wall 61D Energy absorbing rib of jump table (energy absorbing means)

Claims (2)

[Claims] 1. An arrangement structure for a head protection airbag device comprising a roof side rail and a deployment assisting member having a guide wall extending toward an upper end portion of a pillar garnish, wherein the deployment assisting member has a guide wall. An arrangement structure for a head protection airbag device, wherein an energy absorbing means is provided on the lower surface of the airbag bag body to reinforce the guide wall when the airbag bag is deployed, and to provide an impact absorbing function in the event of an occupant head collision. 2. The unfolding assisting member is made of resin, has a substantially T-shaped cross section when viewed from the front and rear direction of the vehicle body, and the energy absorbing means is an energy absorbing rib integrally formed on a lower surface of the guide wall. 2. The method according to claim 1, wherein
The arrangement structure of the head protection airbag device according to the above.