JP2002053005A - Deploying structure of head part protective air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the expanding direction of an air bag body and improve the impact absorbing performance. SOLUTION: The air bag body 16 is expanded toward the inside of a cabin while guided by a guide wall 42A of a slide having the strength enough to not easily deformed by expanding force of the air bag body 16 in expanding the air bag body 16. As a result, the expanding direction of the air bag body 16 is stabilized. In the case when the impact load acts toward the guide wall 42A of the slide base 42 from the cabin inside direction, the guide wall 42A is easily plastically deformed by a cutout part 60 formed on the guide wall 42A to effectively absorb the impact load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head protection airbag device, and more particularly to a head protection device provided with a deployment auxiliary member 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 an airbag device.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. H11-321527 discloses an example of 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. It is proposed in the gazette.

[0003] In such an arrangement structure of a head protection airbag device, an airbag bag body covered with a roof head lining in a folded state deploys the roof head lining into a vehicle interior with a 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 bag 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 in the above to a strength that is not easily deformed by the deployment force of the airbag body, and to stabilize the deployment direction of the airbag body (stabilization of the airbag body deployment direction). 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 a first aspect of the present invention, there is provided a head protection air including a roof side rail having a metal deployment assisting member having a guide wall extending toward an upper end portion of a pillar garnish. In the arrangement structure of the bag device, a notch is formed in a guide wall of the deployment assisting member.

Accordingly, the deployed airbag bag is guided toward the vehicle interior by being guided by the guide wall of the deployment assisting member set to a strength that is not easily deformed by the deployment force of the airbag bag. As a result, the deployment direction of the airbag bag is stabilized, and the airbag bag is smoothly deployed without getting into the gap between the upper end of the pillar garnish and the body or being caught by the upper end of the pillar garnish. In addition, when an impact load acts from the interior of the vehicle toward the deployment assisting member, the notch formed in the guide wall allows the guide wall to be easily plastically deformed and effectively absorb the impact load. 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 folded airbag body is rupturable at the notch formed in the guide wall. The unfolding member is held by the unifying member.

Therefore, in addition to the contents described in claim 1,
Since the folded airbag body is held by a breakable binding member in a notch formed in the guide wall of the deployment assist plate, the folded airbag body can be brought into close contact with the deployment aid plate. As a result, the airbag bag is deployed by breaking the binding member from a state in which the airbag bag is in close contact with the deployment auxiliary plate.
For this reason, since the deployment reaction force of the airbag body can be reliably received by the deployment assistance plate, the deployment direction of the airbag body can be further stabilized.

According to a third aspect of the present invention, there is provided the head protection airbag device according to any one of the first and second aspects, wherein the guide wall is provided at one end of the guide wall along the vehicle longitudinal direction. Is characterized in that a stepped portion is formed, and the airbag bag folded at the stepped portion is held by the deployment assisting member by a breakable binding member.

Therefore, in addition to the contents described in any one of the first and second aspects, the folded airbag body is provided at two positions of the notch portion and the stepped portion on the guide wall of the deployment assist plate. Can be securely held.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a structure for arranging a head protection airbag device 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. 6, a head protection airbag apparatus 10 according to this embodiment includes a sensor 12 for detecting a side collision or a rollover state, an inflator 14 for ejecting gas when activated. , Airbag bag 1
6 as a main component. Sensor 1
2 is arranged, for example, near the lower end of the center pillar (B pillar) 18.

The inflator 14 is disposed on a quarter pillar (C-pillar) 20, and the inflator 14 is connected to the sensor 12 described above. Therefore, the sensor 12
Detects the side collision or the rollover state, the inflator 14 is activated.

The airbag bag 16 is connected to the inflator 14.
As shown by the two-dot chain line in FIG. 6, the gas flows in along the side of the cabin to protect the head of the front seat occupant and the head of the rear seat occupant. A plurality of non-inflating portions 19 are set in the deployed airbag bag body 16 at intervals in the vehicle front-rear direction, and between these non-inflating portions 19 are these non-inflating portions. 19 form a plurality of inflatable portions 21.

The airbag bag 16 is folded in a bellows shape to be elongated, and is housed over a front pillar (A-pillar) garnish, a roof head lining, and a C-pillar garnish. 16A is arranged near the vertical wall portion 22A of the A pillar 22. Also,
The intermediate portion 16B of the airbag bag 16 is the A pillar 2
2. Arranged along the roof side rail 28 and the C-pillar 20, and the rear end 16 </ b> C is arranged at a position where the inflator 14 is disposed so that gas ejected from the inflator 14 flows in. A plurality of mounting portions 3 having mounting holes (not shown) formed in the upper edge portion of the airbag bag 16.
0 is protrudingly formed.

As shown in FIG. 4, the roof side rail 28 includes a roof side outer panel 32 having a hat-shaped cross section disposed outside the vehicle compartment, a roof side inner panel 34 disposed inside the vehicle compartment, and a roof side outer panel. The roof side reinforcement 33 having a substantially hat-shaped cross section is disposed between the roof 32 and the roof side inner panel 34 in a sandwiched state, thereby forming a closed cross section structure. In addition,
An opening weather strip 38 is elastically fitted to a lower end flange portion of the roof side rail 28.

A roof head lining 26 is disposed on the interior side of the inner panel 34 in the roof side rail 28 described above. When the airbag bag is deployed, the opening weather strip 38 and the roof head lining 26 Tip 26 of outer end 26A in the vehicle width direction
B is disengaged from the airbag bag B, and the outer end 26A of the roof head lining 26 in the vehicle width direction is pushed and expanded toward the vehicle interior.

As shown in FIG. 2, a substantially central portion in the longitudinal direction of the vehicle body of the airbag bag 16 folded in a bellows shape and elongated is provided with a slide 42 as a metal deployment assisting member.
The slide 42 is disposed over the upper end 49A of the B pillar garnish 49 in the front-rear direction. Note that the slide 42 is set to a strength that does not easily deform due to the deployment force of the airbag body.

As shown in FIG. 1, the slide 42 has a guide wall 42A extending from the mounting surface 34A of the roof side inner panel 34 toward the upper end 49A of the B-pillar garnish 49, and a downwardly directed tip of the guide wall 42A. And a vertical wall portion 42B formed by
At the outer end in the vehicle width direction of A, a bent portion 42C
Are formed. At both ends in the front-rear direction of the bent portion 42C, mounting flange portions 42D and 42E protruding upward are formed. In addition, these mounting flange portions 42
D and 42E are fixed to the roof side inner panel 34 by bolts 39 and nuts 37.

A mounting portion 30 of the airbag bag 16 is attached to a mounting flange portion 42E on the rear side of the vehicle body of the slide 42.
Are bolts 39 and nuts 3 via a metal reinforcing plate 40.
7 together.

As shown in FIG. 5, a through hole 44 through which a bolt 39 is inserted is formed substantially at the center of the reinforcing plate 40 at a position coaxial with the mounting hole 36 of the mounting portion 30 of the airbag body 16. A through hole 45 through which a bolt 39 is inserted is formed at a substantially central portion of the mounting flange portion 42E of the slide 42 at a position coaxial with the mounting hole 36 of the mounting portion 35 of the airbag body 16.

The mounting flanges 42E of the reinforcing plate 40 and the slide 42 are located near both sides in the front-rear direction of the through hole 44 of the reinforcing plate 40 and near both sides in the front and rear directions of the through-hole 45 of the mounting flange 42E of the slide 42. And the airbag 1
6, caulking portions 46 and 48 are formed to prevent the mounting portion 30 of the airbag body 16 from rotating between the reinforcing plate 40 and the slide 42 while being fixed to the mounting portion 35.

Further, the reinforcing plate 40 has a claw-shaped convex portion 50 formed at the rear side edge thereof by cutting and raising. The protrusion 50 is provided on the roof side inner panel 34.
Is inserted into the hole 52 formed in the
By engaging with the slide 2, the slide 42 and the reinforcing plate 40 are prevented from rotating relative to the roof side inner panel 34 (body).

The other parts of the roof side inner panel 34 and the inner panel of the A pillar 22 are provided with weld nuts 37 in a state where the mounting portion 30 of the airbag body 16 is sandwiched between two reinforcing plates 40. And a bolt 39 for fastening.

As shown in FIG. 1, a rectangular cutout 60 is formed in the vicinity of the front end of the guide wall 42A of the slide 42 from the interior side of the vehicle compartment (in the direction of the arrow A in FIG. 1). When a shock load acts on the guide wall 42A from the (direction) to the guide wall 42A, the guide wall 42A is easily plastically deformed.

As shown in FIG. 3, the airbag bag body 16 folded in the direction along the guide wall 42A (the direction of arrow B in FIG. 3) is provided in the notch 60 of the guide wall 42A. The folded airbag bag 16 is held in close contact with the slide 42 by a binding tape 62 as a binding member that is sometimes breakable.

Further, the guide wall 4 of the slide 42
At the rear end of 2A, there is formed a stepped portion 64 in which a corner inside the vehicle compartment is cut out in a rectangular shape, and also in this stepped portion 64, the folded airbag bag body 16 is provided. A binding tape 6 as a binding member that can be broken when the bag is opened.
2. Therefore, the folded airbag bag body 16 is securely held by the slide 42 at two locations of the notch 60 and the stepped portion 64 in the guide wall 42A of the slide 42.

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

In the present embodiment, when the airbag bag 16 is deployed, the guide wall 4 of the slide 42 set to a strength that does not easily deform due to the deployment force of the airbag bag 16.
Guided by 2A, the airbag bag body 16 is deployed toward the vehicle interior. As a result, the deployment direction of the airbag bag body 16 is stabilized, and it is possible to prevent the deployed airbag bag body 16 from contacting the upper end portion 49A of the B pillar garnish 49, and the deploying airbag bag body 16 There is no dive into the gap between the upper end 49A of the pillar garnish 49 and the body, and no catch on the upper end 49A of the B pillar garnish 49. As a result, the airbag bag 16
Can be smoothly deployed and the B-pillar garnish 49 can be prevented from coming off when the airbag bag is deployed.

In the present embodiment, when an impact load acts on the guide wall 42A of the slide 42 from the vehicle interior side (the direction of the arrow A in FIG. 1), the guide wall 42A
The guide wall 42A is easily plastically deformed by the cutout portion 60 formed in the above. As a result, the slide 4
The impact load acting toward the second guide wall 42A can be effectively absorbed.

Therefore, in the arrangement structure of the head protection airbag device of the present embodiment, both the stabilization direction of the airbag body deployment direction and the shock absorbing performance can be achieved.

In the present embodiment, the folded airbag bag 16 is held in the cutout portion 60 of the guide wall 42A by the binding tape 62 which can be broken when the airbag bag is deployed. The bag bag body 16 can be brought into close contact with the slide 42. As a result, the airbag bag 16 is deployed by breaking the binding tape 62 from a state in which the airbag bag 16 is in close contact with the slide 42.
6 can be reliably received by the slide 42, so that the deployment direction of the airbag bag 16 can be further stabilized.

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, 2
Although the mounting flange portions 42D and 42E are formed at the locations, the configuration may be such that the mounting flange portions are formed at three or more locations along the front-rear direction of the slide 42 instead. In the present embodiment, the present invention is applied to the B pillar garnish 49, but the present invention can be applied to other pillars. In the present embodiment, the present invention is applied to the C pillar 2.
Although the present invention is applied to the arrangement structure of the head protection airbag device in which the inflator 14 is disposed on the head 0, the present invention is applied to a head protection airbag device in which the inflator 14 is disposed in another portion such as an A pillar or a B pillar. It is also applicable to the arrangement structure of. Note that a plurality of notches may be formed in the guide wall of the deployment reinforcing member.

[0036]

According to the first aspect of the present invention, there is provided a head protection airbag device in which a metal deployment auxiliary member having a guide wall extending toward an upper end portion of a pillar garnish is provided on a roof side rail. In the installation structure, since the notch is formed in the guide wall of the deployment assisting member, there is an excellent effect that both the stabilization direction of the airbag body deployment direction and the 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, a foldable bundling portion is formed at a notch formed in the guide wall with the folded airbag body. Since the holding member is held by the deployment assisting member, in addition to the effect described in claim 1, there is an excellent effect that the deployment direction of the airbag body can be further stabilized.

According to a third aspect of the present invention, in the arrangement structure of the head protection airbag device according to any one of the first and second aspects, one end of the guide wall along the longitudinal direction of the vehicle body is provided. The stepped portion is formed, and the airbag bag folded at the stepped portion is held by the deployment assisting member by a breakable bundling member. Therefore, it has an excellent effect that the folded airbag bag can be securely held on the deployment assisting plate.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an arrangement structure of a head protection airbag device according to an embodiment of the present invention, as viewed obliquely from the front inside a vehicle.

FIG. 2 is a side view showing a part of the arrangement structure of the head protection airbag device according to one embodiment of the present invention, as viewed from the inside of the vehicle.

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

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 6;

FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a schematic side view showing an arrangement structure of a head protection airbag device according to one embodiment of the present invention.

[Description of Signs] 10 Head protection airbag device 14 Inflator 16 Airbag bag body 18 Center pillar (B pillar) 20 Quarter pillar (C pillar) 22 Front pillar (A pillar) 28 Roof side rail 34 Roof side member inner panel 42 Slide (deployment assisting member) 42A Slide guide wall 42B Vertical wall of slide 42C Bend of slide 49 B pillar garnish 49A Upper end of B pillar garnish 60 Cutout of slide 62 Binding tape (bundling member) 64 Step of slide Appendix

Continuation of the front page (72) Inventor Takashi Yamamoto 1 Ochiai Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture F-term (reference) in Toyoda Gosei Co., Ltd. 3D054 AA02 AA03 AA07 AA18 BB21 BB24 BB26 CC04 CC08 CC50 EE20 EE25 FF16 FF17

Claims (3)

[Claims] 1. A head protection airbag device comprising a roof side rail and a metal deployment auxiliary member having a guide wall extending toward an upper end portion of a pillar garnish. An arrangement structure of a head protection airbag device, wherein a notch is formed in a guide wall. 2. The head protection according to claim 1, wherein the folded airbag body is held by the deployment assisting member by a breakable bundling member in the notch formed in the guide wall. Arrangement structure of airbag device. 3. A stepped portion is formed at one end of the guide wall along the front-rear direction of the vehicle body, and the airbag bag folded at the stepped portion is unfolded by a binding member that can be broken. 3. The arrangement structure of the head protection airbag device according to claim 1, wherein the head protection airbag device is held by an auxiliary member.