JP3560127B2 - Head protection airbag device for front and rear seats - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to a head protection airbag in which gas is ejected from an inflator when a predetermined high load is applied to a vehicle body side portion, and the gas inflates the airbag bag body from the pillar portion along the roof side rail portion in a curtain shape. Equipment related.
[0002]
[Prior art]
In order to improve the protection performance of the head of the occupant sitting on the front seat when a predetermined high load is applied to the side of the vehicle body, the airbag is stored in a folded state over the front pillar portion and the roof side rail portion. An occupant protection device that expands the bag body in a curtain shape along the side window glass has already been proposed. Hereinafter, a configuration disclosed in WO 96/26087 which discloses this type of occupant protection device will be described.
[0003]
As shown in FIG. 7, the occupant protection device 100 is an elongated member that extends from a front pillar (A-pillar) section 102 through a roof side rail section 104 to a quarter pillar (C-pillar) section 105. Of the duct 106 via a hose 114, 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. An inflator 116 connected to the intermediate portion and ejecting gas when a predetermined high load is applied to the vehicle body side portion is configured as a main component. Further, the airbag body 112 is formed by connecting a plurality of cells 120 each formed in a substantially cylindrical shape and arranged with the vehicle vertical direction as a longitudinal direction.
[0004]
According to the above configuration, when a predetermined high load acts on the vehicle body side, gas is blown from the inflator 116. Therefore, the ejected gas flows into each cell 120 of the folded airbag body 112 via the hose 114 and the duct 106. As a result, each cell 120 expands in a substantially cylindrical shape with the vehicle vertical direction as the longitudinal direction, whereby the airbag bag body 112 expands in a curtain shape along the window glass 122. Further, an intermediate portion of the airbag bag body 112 is arranged inside the upper portion of the center pillar portion 124.
[0005]
[Problems to be solved by the invention]
However, in the head protection airbag device as described above, a configuration in which the rear portion of the airbag bag 112 is stored inside the quarter pillar portion 105 can be considered. In this case, the quarter is opened when the airbag bag is deployed. The pillar section 105 must also be configured to be deployable. For this reason, for example, even if only a part of the quarter pillar garnish, which is a relatively large part, is deployed, the material and structure of the quarter pillar garnish need to be changed, resulting in a significant increase in cost.
[0006]
This problem also occurs in the front pillar (A-pillar) garnish of the front and rear seat head protection airbag device in which the inflator is disposed on the quarter pillar (C-pillar) side.
[0007]
In consideration of the above facts, the present invention does not substantially deploy the pillar garnish on the side where the inflator is not disposed in any one of the A pillar and the C pillar at the time of deployment of the airbag bag. An object of the present invention is to provide a head protection airbag device for front and rear seats in which a tension line can be formed even in a lower portion on a side where an inflator is not provided.
[0008]
[Means for Solving the Problems]
The present invention according to claim 1 is a head protection airbag device for front and rear seats having an airbag bag body that extends from the A pillar via the roof side rail to the C pillar and develops in a curtain shape,
An inflator disposed on one of the A pillar side and the C pillar side,
One end is integrated with the airbag bag body, and the other end is fixed to a body inner panel provided on one of the A-pillar side and the C-pillar side where the inflator is not provided. A tension band stored between the pillar garnish and the body inner panel disposed on the inner side in the vehicle width direction of the inner panel,
A portion of the airbag bag that overlaps with the pillar garnish in a deployed state side view is stored only in the roof side rail portion at a portion on the side where the inflator is not provided, and the tension band-shaped body is provided. Is characterized in that when the airbag bag is deployed, the airbag bag moves toward the vehicle interior from a gap between the stored pillar garnish and the body inner panel .
[0009]
Therefore, when the airbag bag is deployed, the portion of the airbag bag where the inflator is not provided swells from the roof side rail portion due to the gas generated from the inflator, and the portion where the inflator is not provided. Deploy to the interior side of the pillar garnish. On the other hand, the tension band which is fixed to one of the body inner panels on the A-pillar side and the C-pillar side where one end is integrated with the airbag bag body and the other end is not provided with the inflator is stored. The vehicle moves from the gap between the pillar garnish and the body inner panel to the vehicle interior. As a result, during deployment of the airbag bag, the pillar garnish of the one of the A pillar and the C pillar, on which the inflator is not provided, is not substantially deployed, and the side of the airbag bag, on which the inflator is not provided, is provided. A tension line can also be formed in the lower part of the frame.
[0010]
The present invention according to claim 2 is a head protection airbag device for front and rear seats having an airbag bag body that extends from the A pillar via the roof side rail to the C pillar and develops in a curtain shape,
An inflator arranged on the A-pillar side,
A C-pillar garnish, one end of which is integrated with the airbag body, the other end of which is fixed to a body inner panel provided on the C-pillar side, and which is provided inside the body inner panel in the vehicle width direction; A tension band stored between the body inner panel,
And a rear portion of the airbag body overlapping with the C-pillar garnish in an unfolded state side view is stored only in a roof side rail portion at a portion on the side of the C-pillar , and the tension band-shaped member is provided in the airbag. When the bag is unfolded, the bag moves toward the vehicle interior from a gap between the stored C pillar garnish and the body inner panel .
[0011]
Therefore, when the airbag bag is deployed, the portion of the airbag bag on the C-pillar side is swelled from the roof side rail portion by the gas generated from the inflator, and is deployed on the interior side of the C-pillar garnish. On the other hand, the tension band having one end integrated with the airbag body and the other end fixed to the body inner panel on the C-pillar side is inserted into the cabin through the gap between the stored C-pillar garnish and the body inner panel. Move inward. As a result, a tension line can be formed even in the lower portion of the airbag bag on the C-pillar side without substantially deploying the C-pillar garnish when the airbag bag is deployed.
[0012]
According to a third aspect of the present invention, in the head protection airbag device for the front and rear seats according to the first aspect, the airbag bag body has an inflation chamber for a front seat and an inflation chamber for a rear seat, and one end of the strip have been found integrally provided on the intermediate part between the expansion chamber and the rear-seat inflation compartment front seat in the air bag body, and the strip for the tension rear seat expansion chamber And at least one of the front seat expansion chamber and the front seat expansion chamber.
[0013]
Therefore, in addition to the contents described in claim 1, a portion of the deployed airbag bag body on which the inflator is not provided is supported by the tension band even at a position not overlapping with the pillar garnish in the vehicle width direction. You. As a result, since the airbag bag is widely supported by the pillar garnish and the tension band, the outward movement of the airbag bag in the vehicle width direction can be effectively suppressed.
[0014]
According to a fourth aspect of the present invention, there is provided the head protection airbag device for the front and rear seats according to the third aspect, wherein the tension band is formed by a front seat expansion chamber and a rear seat expansion chamber in the airbag body. The intermediate portion itself is cut out and folded back, and the tip is fixed to the body inner panel.
[0015]
Therefore, in addition to the contents described in claim 3, there is no need to manufacture the tension band-shaped body separately from the airbag bag body, and the folded state is obtained by cutting off the middle part itself of the airbag bag body. The volume is reduced. For this reason, it is more advantageous in terms of cost and storability as compared with the case where the tension band is formed separately from the airbag bag.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the head protection airbag device for front and rear seats of the present invention will be described with reference to FIGS.
[0017]
In the drawings, the arrow FR indicates the vehicle forward direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width inside direction.
[0018]
As shown in FIG. 2, the head protection airbag device 10 for front and rear seats includes a sensor 12 for detecting a side collision state, a cylindrical inflator 14 for ejecting gas when activated, and a predetermined folding method. And the airbag bag body 16 folded as a main component. 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.
[0019]
The inflator 14 is provided in the vicinity of the connection between the A-pillar (front pillar) 20 and the instrument panel 22, and is connected to the sensor 12 described above. Therefore, when the sensor 12 detects the side collision state, the inflator 14 operates.
[0020]
The airbag body 16 is formed into a bag shape by weaving or folding one piece of base cloth at the lower end and bonding the periphery thereof by bonding, sewing, or the like, and covering the entire outer surface of the base cloth. In addition, a coating material having an increased tensile strength is applied by mixing fine fibers made of nylon, carbon, or the like into a highly airtight resin, for example, a silicone resin.
[0021]
As shown in FIG. 1, the airbag bag body 16 has a curtain shape in a deployed state, and covers the upper part and the central part of the front side window glass 28, the center pillar 18, and the rear side window glass 30. Further, the airbag bag body 16 has front seat inflation chambers 40, 42, 44, 46 that are deployed on the side of the head 34 </ b> A of the front seated occupant 34 and on the upper side of the center pillar 18 in side view. And expansion chambers 48, 50 for rear seats that are deployed to the side of the head 36A of the rear seated occupant 36. A non-inflatable portion 39 extending substantially vertically is formed at a substantially central portion in the vertical direction of the airbag body 16 between these inflation chambers 40, 42, 44, 46, 48, and 50. Each of the expansion chambers 40, 42, 44, 46, 48, and 50 has a substantially cylindrical shape that extends substantially vertically. Further, the inflator 14 and each of the inflation chambers 40, 42, 44, 46, 48, 50 are connected by a gas supply passage 52, and the gas supply passage 52 is formed along the upper peripheral portion 16 </ b> A of the airbag bag 16. Have been.
[0022]
At the upper peripheral portion 16A of the airbag body 16, mounting portions 16B are formed at predetermined intervals in the front-rear direction. The airbag bag 16 is configured such that the A pillar 20, the roof side It is fixed to the rail 56.
[0023]
As shown in FIG. 3, the airbag bag body 16 is stored in a state of being folded and elongated in a predetermined manner. Further, in a portion where the rear portion of the airbag body 16 is stored, a convex portion 82A having a trapezoidal cross section which bulges into the vehicle interior is formed near the lower portion of the body inner panel 82 where the airbag body is stored. I have. The convex portion 82A is formed substantially in the front-rear direction, and when the airbag body is deployed, the rear portion of the airbag body 16 is guided by the convex portion 82A, and is located in the vehicle compartment (in the direction of arrow A in FIG. 3). ), And the roof head lining 64 is effectively deployed in the vehicle compartment (in the direction of the arrow B in FIG. 3).
[0024]
As shown in FIG. 2, the front part of the folded airbag body 16 is stored in the front pillar garnish 62, and the middle part and the rear part of the folded airbag body 16 are connected to the roof side rail part. It is stored in the roof head lining 64 that constitutes it. Accordingly, at the rear of the airbag bag 16, when the airbag bag is deployed, the airbag bag 16 pushes open only the roof head lining 64 and deploys into the vehicle interior, as shown by the two-dot chain line in FIG. 3. It is supposed to. In FIG. 3, reference numeral 74 denotes a roof panel.
[0025]
As shown in FIG. 1, a belt 80 as a tension band-shaped body which is a separate member from the airbag bag 16 and extends in the front-rear direction is provided at a lower rear portion of the airbag bag 16.
[0026]
As shown in FIG. 5, the front end portion 80A of the belt 80 is formed at a base portion of an intermediate portion 16C between the front seat expansion chamber 46 and the rear seat expansion chamber 48 on the vehicle width direction outer side surface of the airbag bag body 16. The rear end portion 80B of the belt 80 is fixed to a body inner panel 82 disposed outside the vehicle compartment of a C pillar (quarter pillar) garnish 76 by using a cloth alone and fixed to a lower portion where there is no expansion chamber by a sewing or an adhesive. It is fixed by connecting members 84 such as bolts and nuts. In FIG. 5, reference numeral 83 denotes a body outer panel (quarter panel).
[0027]
As shown in FIG. 2, the belt 80 is stored along the front of the C-pillar garnish 76.
[0028]
As shown in FIG. 3, the belt 80 is stored between the C-pillar garnish 76 and the body inner panel 82, and when the airbag bag body 16 is deployed, it is shown by a two-dot chain line in FIG. As described above, the weather strip 86 provided at the connection between the body inner panel 82 and the C pillar garnish 76 is deformed in the vehicle interior (in the direction of arrow C in FIG. 3), and the body inner panel 82 and the C pillar garnish 76 are 3 moves to a position on the vehicle interior side indicated by a two-dot chain line in FIG.
[0029]
As shown in FIG. 5, the belt 80 is disposed on the outer surface in the vehicle width direction of the airbag body 16, so that when the airbag body is deployed, the rear inflation chamber 48 of the airbag body 16 is provided. , 50 in the vehicle width direction.
[0030]
That is, the rear part of the airbag body 16 is stored in the roof head lining 64, and only the belt 80 is stored between the body inner panel 82 and the C-pillar garnish 76. Expands from above into the interior of the C-pillar garnish 76 and the belt 80 moves through the gap between the body inner panel 82 and the C-pillar garnish 76 toward the interior of the vehicle, and the rear seat of the airbag bag 16 The expansion chambers 48 and 50 extend outward in the vehicle width direction along the front-rear direction.
[0031]
Next, the operation of the present embodiment will be described.
[0032]
In the head protection airbag device for the front and rear seats of the present embodiment, when the sensor 12 detects a side collision state, the inflator 14 operates, the airbag body 16 expands, and the airbag bag body 16 enters the vehicle interior. Start deployment. At this time, in the present embodiment, the rear portion of the airbag bag body 16 stored only in the roof head lining 64 pushes only the roof head lining 64 open as shown by a two-dot chain line in FIG. expand.
[0033]
On the other hand, the front end 80A is sewn to the lower portion of the intermediate portion 16C of the airbag bag body 16, the rear end 80B is fixed to the body inner panel 82, and the belt 80 stored between the body inner panel 82 and the C pillar garnish 76. Deforms a weather strip 86 provided at the connection between the body inner panel 82 and the C-pillar garnish 76, and shows a vehicle compartment indicated by a two-dot chain line in FIG. 3 from a gap between the body inner panel 82 and the C-pillar garnish 76. Move to the inner part. Further, as shown in FIG. 5, the belt 80, which has moved toward the vehicle interior from the gap between the body inner panel 82 and the C-pillar garnish 76, is moved in the vehicle width direction by the rear seat inflation chambers 48, 50 as shown in FIG. It is curved outward without slack, and forms a predetermined tension line along the vehicle longitudinal direction.
[0034]
As a result, in the present embodiment, the C-pillar garnish 76 can be substantially prevented from being deployed when the airbag bag is deployed, and the tension line is also formed below the rear portion of the airbag bag 16 by the belt 80. Can be.
[0035]
The belt 80 is located outside the rear inflation chambers 48 and 50 of the airbag 16 when the airbag 16 is deployed, so that the C-pillar garnish 76 The airbag bag 16 is supported by the belt 80 even at a position where it does not overlap with the vehicle width direction. As a result, since the rear part of the airbag body 16 is widely supported by the C-pillar garnish 76 and the belt 80, the rearward movement of the rear part of the airbag body 16 in the vehicle width direction is effectively suppressed. it can.
[0036]
In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to such an embodiment, and various other embodiments are possible within the scope of the present invention. Some will be apparent to those skilled in the art. For example, in the head protection airbag device for the front and rear seats of the present invention, the belt 80 as the tension band is formed as a separate member from the airbag bag 16, but instead of the belt 80, as shown in FIG. The lower portion 80 of the intermediate portion 16C of the airbag bag body 16 between the front-seat inflation chamber 46 and the rear-seat inflation chamber 48 has its opening directed rearward as shown by a two-dot chain line in FIG. It may be configured to be cut out in a U-shape, and the U-shaped inner portion is folded back. In this case, there is no need to manufacture the belt 80 separately from the airbag bag body 16, and the volume of the airbag bag body 16 in the folded state is reduced by cutting off the lower part itself of the intermediate portion 16 </ b> C. For this reason, compared with the case where the belt 80 and the airbag bag body 16 are formed of different members, it is more advantageous in terms of cost and storability.
[0037]
Also, in the present embodiment, the head protection airbag device for front and rear seats in which an inflator is disposed on the front pillar (A pillar) side has been described. However, the present invention provides an inflator on the quarter pillar (C pillar) side. The head protection airbag device for the front and rear seats is also applicable. In this case, the front part of the airbag body 16 is stored only in the roof head lining 64 and the belt 80 is connected to the A pillar garnish and the body. With the configuration stored between the inner panel (A-pillar inner panel) and the inner panel (A-pillar inner panel), the same operation and effect as in the above embodiment can be obtained.
[0038]
【The invention's effect】
As described above, the head protection airbag device for front and rear seats according to the first aspect of the present invention provides a pillar on which the inflator is not disposed in one of the A pillar and the C pillar when the airbag body is deployed. There is an excellent effect that the tension line can be formed even in the lower portion of the airbag body where the inflator is not provided without substantially deploying the garnish.
[0039]
Further, the head protection airbag device for the front and rear seats according to the second aspect of the present invention can be provided at the lower portion of the airbag bag on the C-pillar side without substantially deploying the C-pillar garnish when the airbag is deployed. Also has an excellent effect that a tension line can be formed.
[0040]
According to the third aspect of the present invention, in addition to the effects of the first aspect, the head protection airbag device for front and rear seats can effectively suppress the outward movement of the airbag body in the vehicle width direction. It has an excellent effect of being able to.
[0041]
Further, the head protection airbag device for front and rear seats according to the present invention described in claim 4 has an excellent effect that it is more advantageous in terms of cost and storability in addition to the effect described in claim 3.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing a completed deployment state of an airbag body in a head protection airbag device for front and rear seats according to an embodiment of the present invention.
FIG. 2 is a schematic side view showing a stored state of an airbag body in a head protection airbag device for front and rear seats according to an embodiment of the present invention.
FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2;
FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 1;
FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG.
FIG. 6 is an enlarged side view showing a part of an airbag body in an expanded state in a head protection airbag device for front and rear seats according to another embodiment of the present invention.
FIG. 7 is a schematic side view showing a completed state of deployment of an airbag body in a head protection airbag device according to a conventional embodiment.
[Explanation of symbols]
10 Front and rear seat head protection airbag device 14 Inflator 16 Airbag bag 20 A pillar (front pillar)
34 Front seat occupant 36 Rear seat occupant 40 Front seat expansion chamber 42 Front seat expansion chamber 44 Front seat expansion chamber 46 Front seat expansion chamber 48 Rear seat expansion chamber 50 Rear seat expansion chamber 56 Roof side rail 64 Roof head lining 76 C pillar (quarter pillar) garnish 80 belt (Tension belt)
82 Body inner panel 84 Coupling member 86 Weather strip

Claims (4)

In a head protection airbag device for front and rear seats having an airbag bag body which extends from the A pillar via the roof side rail to the C pillar and extends in a curtain shape,
An inflator disposed on one of the A pillar side and the C pillar side,
One end is integrated with the airbag bag body, and the other end is fixed to a body inner panel provided on one of the A-pillar side and the C-pillar side where the inflator is not provided. A tension band stored between the pillar garnish and the body inner panel disposed on the inner side in the vehicle width direction of the inner panel,
A portion of the airbag bag that overlaps with the pillar garnish in a deployed state side view is stored only in the roof side rail portion at a portion on the side where the inflator is not provided, and the tension band-shaped body is provided. The front and rear seat head protection airbag device is characterized in that when the airbag bag is deployed, the airbag device moves toward the vehicle interior from a gap between the stored pillar garnish and the body inner panel . In a head protection airbag device for front and rear seats having an airbag bag body which extends from the A pillar via the roof side rail to the C pillar and extends in a curtain shape,
An inflator arranged on the A-pillar side,
A C-pillar garnish, one end of which is integrated with the airbag body, the other end of which is fixed to a body inner panel provided on the C-pillar side, and which is provided inside the body inner panel in the vehicle width direction; A tension band stored between the body inner panel,
And a rear portion of the airbag body overlapping with the C-pillar garnish in an unfolded state side view is stored only in a roof side rail portion at a portion on the side of the C-pillar , and the tension band-shaped member is provided in the airbag. The head protection airbag device for front and rear seats, wherein when the bag is deployed, the bag moves toward a vehicle interior from a gap between the stored C pillar garnish and the body inner panel . The airbag body has a front seat expansion chamber and a rear seat expansion chamber, and one end of the tension band is disposed between the front seat expansion chamber and the rear seat expansion chamber in the airbag body. characterized in that the intermediate portion are al provided integrally with the, where and the tension belt-like body is disposed either in the vehicle width direction outer side of the expansion chamber and the front-seat inflation chamber rear seat The head protection airbag device for front and rear seats according to claim 1, wherein: The tension band-shaped body is characterized in that an intermediate portion itself between the front-seat inflation chamber and the rear-seat inflation chamber in the airbag bag body is cut out and folded, and the tip is fixed to the body inner panel. The head protection airbag device for front and rear seats according to claim 3.

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