JP2000052905A - Arrangement structure of air bag device for protecting head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the catching to the upper end of the B pillar garnish of an air bag body at the spreading time of the air bag body without increasing the number of part items. SOLUTION: A recessed part 54 extending to a vehicular front/rear direction is formed on the upper end of a B pillar garnish 50 and a recessed part 56 is formed in parallel with the recessed part 54 on the downside of the recessed part 54. The installation parts 58A, 58B of the assist grip 58 for getting on/off are inserted in the recessed parts 54, 56 and the bottoms 54A, 56A of the recessed part 54, 56 and the installation parts 58A, 58B of the assist grip 58 are tightened together on a B pillar inner panel 60. The terminal 42B of the outside 42A of the car width direction of a roof head lining 42 is interposed between the upper surface 58D of the assist grip 58 and air bag body 16 and the upper surface 58D of the installation part 58A is formed to a guide surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inflator in which gas is blown out from an inflator when a predetermined high load is applied to a side of a vehicle body, and the airbag bag housed from a pillar portion along a roof side rail portion by this gas. The present invention relates to an arrangement structure of a head protection airbag device that inflates in a curtain shape.

[0002]

2. Description of the Related Art In order to improve the protection performance of a head of an occupant sitting in a front seat when a predetermined high load is applied to a side portion of a vehicle body, the vehicle extends from a front pillar (A pillar) to a roof side rail. 2. Description of the Related Art A head protection airbag device has been proposed in which an airbag bag body stored in a folded state is inflated in a curtain shape along a side window glass. Hereinafter, a configuration disclosed in WO 96/26087, which discloses this type of head protection airbag device, will be described.

As shown in FIG. 7, a head protection airbag device 100 is an elongated duct 1 disposed from an A pillar 102 to a roof side rail 104.
06, an airbag bag body 112 stored in a folded state in the duct 106 and fixed to the vehicle body at a front end fixing point 108 and a rear end fixing point 110, and a hose 11
4, an inflator 116 connected to the rear end of the duct 106 and ejecting gas when a predetermined high load is applied to the vehicle body side, and one end fixed to the vehicle body and the other end connected to the airbag. A belt-shaped strap 118 fixed to the rear end of the bag body 112 is a main component. Further, the airbag bag body 112 is formed by connecting a plurality of cells 120 each formed in a substantially cylindrical shape and arranged with the longitudinal direction substantially in the vehicle vertical direction.

According to the above configuration, when a predetermined high load is applied to the side of the vehicle body, gas is ejected from the inflator 116. Therefore, the ejected gas is supplied to the hose 114.
Then, the air flows into each cell 120 of the folded airbag bag 112 via the duct 106. As a result, each cell 120 expands in a substantially cylindrical shape with the longitudinal direction substantially in the vehicle vertical direction, whereby the airbag bag body 112 expands in a curtain shape along the window glass 122. Further, the rear end of the airbag bag body 112 has a strap 118.
The rear end side of the airbag bag 112 is reliably connected to the center pillar (B pillar) 1
24 is arranged inside the upper part.

[0005]

However, in the head protection airbag device 100, the airbag bag 11 is not provided.
2 from the A pillar 102 to the roof side rail 10
4 so as to cover, for example, an A-pillar garnish and a roof head lining. As a result, when the airbag bag is deployed, the A-pillar garnish and the roof head lining are deformed, and the airbag bag is deployed toward the passenger compartment from these deformed portions. Further, in the head protection airbag device 100, the rear end 112A of the airbag bag body 112 reaches the rear of the B pillar 124. For this reason, the airbag bag body 112 that deforms the outer end portion of the roof head lining in the vehicle width direction and inflates and deploys in the vehicle interior falls between the garnish of the B pillar portion 124 and the body panel, and the garnish of the B pillar portion 124 It is conceivable that the garnish is caught on the upper end of the garnish or the garnish comes off.

In order to improve this, an invention in which a guide means such as a bracket for guiding the deployment direction of the airbag body in a predetermined direction is proposed (Japanese Patent Application No. 9-261743: not disclosed), In this case, since a guide means such as a bracket is separately required, the number of parts increases,
This will increase costs.

In view of the above, the present invention provides a head protection airbag device capable of preventing the airbag bag from being caught on the upper end of the B pillar garnish when the airbag bag is deployed without increasing the number of parts. The purpose is to obtain an arrangement structure.

[0008]

According to a first aspect of the present invention, there is provided a head protection airbag device having a curtain extending over an A-pillar and a roof side rail. A B-pillar garnish in which the bottom of the formed recess abuts against the inner panel of the B-pillar, and the mounting part inserted in the recess, the getting-on / off assist grip fixed to the inner panel of the B-pillar by fastening means,
The vehicle width direction outer end portion has a roof head lining interposed between the mounting portion of the getting-on / off assist grip and an airbag bag.

Therefore, the assist grip for getting on and off the vehicle
Since the upper end of the B-pillar garnish is fixed to the inner panel of the B-pillar by fastening means, when the airbag bag is deployed, the mounting portion of the getting-on / off assist grip inserted into the recess formed in the upper end of the B-pillar garnish. In addition, the airbag bag body can be prevented from contacting the upper end of the B pillar garnish, and the airbag can be prevented from being caught on the upper end of the B pillar garnish and coming off. Further, since the getting-on / off assist grip, which is an existing interior part, is used, the number of parts does not increase.

According to a second aspect of the present invention, in the arrangement structure of the head protection airbag device according to the first aspect, an upper surface of the assist grip facing the airbag bag is provided.
It is a guide surface that is inclined downward in the vehicle interior.

Therefore, in addition to the contents described in the first aspect, when the airbag bag is deployed, the airbag bag is smoothly deployed toward the vehicle interior along the guide surface formed on the upper surface of the assist grip.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the arrangement structure of the head protection airbag device of 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, a head protection airbag device 10 according to the present embodiment includes a sensor 12 for detecting a side collision state, a column-shaped inflator 14 for ejecting gas when activated. And an airbag body 16 as main components. 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 provided on a quarter pillar (C pillar) 30 and is connected to the sensor 12 described above. Therefore, when the sensor 12 detects the side collision state, the inflator 14 operates.

In a vertically intermediate portion of the inflated and deployed airbag body 16 in a vertical direction, a tension line T connecting a front end fixed point and a rear end fixed point of the airbag body 16 is traversed, and the airbag body is vertically moved. Are formed, and a plurality of substantially parallel cylindrical inflatable portions 24 having the longitudinal direction as the longitudinal direction are formed. The upper ends of these cylindrical inflatable portions 24 communicate with a gas introduction passage 25. The gas introduction path 25 is arranged substantially linearly along the roof side rail 28, and one end 25 </ b> A is connected to the inflator 14 via the gas guide pipe 17. Therefore, the gas ejected from the inflator 14 flows through the gas inflow passage 25 to the cylindrical expansion portion 24.
It is designed to flow into.

The upper end edge of the intermediate portion 16B of the airbag bag body 16 has a roof side rail 28 and a front pillar (A).
The front end 16 </ b> A is disposed near a connection between the A-pillar 20 and the instrument panel 22. At the upper edge of the airbag body 16, mounting portions 35 are formed so as to protrude at predetermined intervals, and the airbag bag body 16 is fixed to the vehicle body by fixing members 36 such as bolts at these mounting portions 35. Fixed on the side.

As shown in FIG. 5, the air bag 16
Is folded in a bellows shape in a substantially vertical direction to be elongated, and is housed over the A-pillar garnish 26 and the outer side portion 42A of the roof head lining 42 in the vehicle width direction.

As shown in FIG. 1, the roof side rail 28 has a rail outer panel 48 having a substantially hat-shaped cross section protruding to the outside of the cabin, and a substantially hat-shaped cross section protruding relatively to the cabin side. , 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. Both ends of the rail outer panel 48, the rail inner panel 40, and the rail reinforcement 49 are joined by welding,
It constitutes a closed section. An outer end 46A of the roof panel 46 in the vehicle width direction is welded to an upper end 28A of the roof side rail 28 formed by the three members.

The airbag bag 16 is folded in a direction substantially perpendicular to a B-pillar garnish 50 disposed on the inside of the vehicle interior of the B-pillar 18, and the folded airbag bag 16 is mounted on a roof head. It is stored between the outer side portion 42A of the lining 42 in the vehicle width direction and the rail inner panel 40.

As shown in FIG. 2, a concave portion 54 extending in the vehicle front-rear direction is formed at the upper end of the B pillar garnish 50, and a concave portion 56 is formed below the concave portion 54 in parallel with the concave portion 54. Have been. In these concave portions 54 and 56, mounting portions 58A and 58B formed at both ends of a U-shaped assist grip 58 for insertion and exit are inserted. The mounting portion 5 of the assist grip 58
8A and 58B are substantially flush with the vehicle interior side surface 50A of the B pillar garnish 50, and a grip portion 58C of the getting-on / off assist grip 58 projects rearward from the B pillar garnish 50.

As shown in FIG. 1, the bottoms 54A, 56 of the recesses 54, 56 formed in the B pillar garnish 50.
A is in contact with the B pillar inner panel 60, and these contact portions are provided with through holes 62, 64, respectively.
Are drilled. Mounting holes 66, 68 are formed in the mounting portions 58A, 58B of the assist grip 58, and bolts 70 as fastening means inserted into these mounting holes 66, 68 are screwed into the bolts 70. Nut 72
As a result, the assist grip 58 and the B pillar garnish 50 are fastened together. The mounting holes 66, 68
Large-diameter portions 66A and 68A are formed in the vehicle interior side, and the head 70A of the bolt 70 is housed in these large-diameter portions 66A and 68A.

Attachment 5 above assist grip 58
The terminal portion 42B of the vehicle width direction outer portion 42A of the roof head lining 42 is interposed between the upper surface 58D of the airbag body 16 and the upper surface 58D of the mounting portion 58A. Is engaged. Also, the mounting portion 58
The upper surface 58D of A is a guide surface that is inclined downward in the vehicle compartment.

Therefore, when the airbag bag 16 is deployed, as shown in FIG. 3, the airbag bag 16 is guided by the upper surface 58D of the mounting portion 58A of the assist grip 58, and smoothly enters the vehicle interior. It is designed to expand.

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

In this embodiment, when a side impact load of a predetermined value or more acts on 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 bag body 16 starts to inflate, and the inflated airbag bag body 16 pushes and opens the pillar garnish 26 of the A pillar 20 and the vehicle width direction outer portion 42A of the roof head lining 42, and the roof side rail 28 Is swelled downward from the vehicle rear side toward the vehicle front side in a curtain shape.

At this time, when the deployment of the airbag bag body 16 reaches the upper part of the B pillar 18, as shown in FIG.
8 and the upper surface 58D of the mounting portion 58A and the airbag bag 16
The terminal portion 42B of the vehicle width direction outer portion 42A of the roof head lining 42 interposed between the terminal portion 42B and the upper surface 58D of the mounting portion 58A is disengaged from the vehicle width direction outer portion 42A of the roof head lining 42. Pushed open. On this occasion,
The airbag body 16 is guided along the upper surface 58D of the mounting portion 58A and smoothly deploys to the vehicle interior.

Therefore, in this embodiment, the upper and lower ends of the B pillar garnish 50 are attached together with the mounting portion 58A of the assist grip 58 by the getting on / off assist grip 58.
Since the airbag body is deployed, the assist grip 58 for getting on and off guides the airbag body 16 in a predetermined direction on the vehicle interior side when the airbag body is deployed.
As a result, it is possible to prevent the airbag bag body 16 from contacting the upper end of the B pillar garnish 50, and prevent the airbag bag 16 from being caught on the upper end of the B pillar garnish 50 and the B pillar garnish 50 coming off. In the present embodiment,
Since the getting-on / off assist grip 50 which is an existing interior part is used, the number of parts does not increase.

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 the above embodiment, the gas from the inflator 14 disposed on the C pillar 30 causes the airbag bag body 16 to be sequentially deployed from the vehicle rear side to the vehicle front side. As described above, the positions of the front ends of the mounting portions 58A, 58B of the getting-on / off assist grip 58 are set to the middle portion in the front-rear direction of the B pillar garnish 50, and the concave portions 54, 56 of the B pillar garnish 50 are also the middle portions in the front-rear direction of the B pillar garnish 50. May be up to.

[0029]

As described above, the arrangement structure of the head protection airbag device according to the first aspect of the present invention can be applied to the airbag bag when the airbag bag is deployed without increasing the number of parts. It has an excellent effect that it can prevent the B-pillar garnish from being caught on the upper end portion and the B-pillar garnish from coming off.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the arrangement structure of the head protection airbag device of the present invention is capable of smoothly deploying the airbag bag body toward the vehicle interior. Has excellent effects.

[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 of the upper part of a B-pillar to which the arrangement structure of the head protection airbag device according to one embodiment of the present invention is applied, viewed from diagonally rear inner side of the vehicle.

FIG. 3 is an operation explanatory view of an arrangement structure of the head protection airbag device according to one embodiment of the present invention.

FIG. 4 is a schematic side view showing a completed deployment state of an airbag body on a driver's seat side of a vehicle cabin to which an arrangement structure of a head protection airbag device according to an embodiment of the present invention is applied.

FIG. 5 is a schematic side view showing a state in which an airbag body is stored in a driver's seat side of a vehicle cabin to which the arrangement structure of the head protection airbag device according to one embodiment of the present invention is applied.

FIG. 6 is a perspective view of the upper part of a B-pillar to which an arrangement structure of a head protection airbag device according to another embodiment of the present invention is applied, as viewed from an obliquely rear inner side of a vehicle.

FIG. 7 is a schematic side view showing a deployment completed state of a head protection airbag bag according to a conventional embodiment.

[Explanation of symbols]

Reference Signs List 10 Head protection airbag device 16 Airbag bag body 18 B pillar 20 A pillar 28 Roof side rail 40 Rail inner panel 42 Roof head lining 42A Outside portion of roof head lining in the vehicle width direction 50 B pillar garnish 54 B recess of B pillar garnish 56 Recessed part of B pillar garnish 58 Assist grip for getting on and off 58A Mounting part of assist grip for getting on and off 58B Mounting part of assist grip for getting on and off 58C Gripping part of assist grip for getting on and off 58D Upper surface of mounting part of assist grip for getting on and off (guide surface) 60 B pillar inner panel

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Kenichi Nakajima 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 3D023 BA01 BA07 BB09 BB14 BC01 BD08 BD10 BE09 BE15 BE24 BE35 3D054 AA02 AA03 AA07 AA16 AA18 BB21 BB30 FF04 FF16 FF17

Claims (2)

[Claims] 1. An arrangement structure of a head protection airbag device which is deployed in a curtain shape across an A pillar and a roof side rail, wherein a bottom portion of a concave portion formed at an upper end portion is formed on an inner panel of a B pillar. A B-pillar garnish that abuts, an assist grip for getting on and off the mounting part inserted into the recess is fixed to an inner panel of the B pillar by fastening means, and an outer terminal in a vehicle width direction mounting the assist grip for getting on and off. And a roof head lining interposed between the portion and the airbag bag body. 2. The head protection airbag device according to claim 1, wherein an upper surface of the assist grip facing the airbag body is a guide surface inclined downward toward the interior of the vehicle. Arrangement structure.