JPH11235965A - Head protection airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the inflating completion time of an airbag body without causing a significant cost increase. SOLUTION: The front end part 16A of an airbag body 16 is disposed at a position where an inflator 14 is disposed, and the section of the airbag body 16 disposed along a front pillar 20 is made to serve as a gas introduction passage 40 for feeding gas to inflating chambers 26, 28, 39, 32 for front seat. A reinforcing liner tube 42 leading to a position beyond front seat inflating chambers 26, 28, 30, 32 on the upstream side from the inflator 14 is provided in the gas introduction passage 40. The gas jetted from the inflator 14 is fed through the reinforcing liner tube 42, starting with the front seat inflating chamber 32 on the downstream side farthest from the inflator 14.

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 a head protection airbag device that inflates in a curtain shape.

[0002]

2. Description of the Related Art In order to improve the head protection performance of an occupant sitting on a seat when a predetermined high load is applied to the side of a vehicle body, the occupant is stored in a folded state over a front pillar portion and a roof side rail portion. There has already been proposed a head protection airbag device for expanding the airbag bag body in a curtain shape along the side window glass. Hereinafter, Japanese Patent Application Laid-Open No. 9-15 / 15 discloses this type of head protection airbag device.
The configuration disclosed in Japanese Patent No. 6450 will be described.

As shown in FIG. 16, in an airbag body 100 of this head protection airbag device, a front pillar mounting portion 100A is fixed to a vehicle interior side of a front pillar 102 of a vehicle by a fixing member 104 such as a bolt. The roof side rail mounting portion 100B is fixed to the vehicle interior side of the roof side rail 106 of the vehicle by a fixing member 104 such as a bolt.

[0004] The airbag body 100 has a front pillar mounting portion 100A and a roof side rail mounting portion 10A.
0B is formed on the same straight line, and a curtain-shaped bag body 100C provided with a plurality of expansion chambers extending substantially vertically in the lower part thereof. An opening 100D is formed at the front end of the airbag body 100, and a gas guide tube is connected to the opening 100D. When the airbag body is deployed, an inflator 108 formed below the front pillar 102 is formed. The airbag body 100 is deployed in a curtain shape along the side window glass 110 by the gas ejected from the airbag.

[0005]

However, in the head protection airbag device as described above, the gas injected from the inflator 108 causes the airbag bag 10 to be closed.
0, a plurality of expansion chambers are located near the inflator 108,
That is, expansion and deployment are performed in order from the expansion chamber on the front pillar side. For this reason, the time required for the airbag bag to completely complete deployment is extended. In particular, when the rear-seat inflation chamber is set in addition to the front-seat inflation chamber, the rear-seat inflation chamber and the inflator are separated from each other, so that the time required for the airbag bag to completely deploy is further increased. . In order to improve this, it is conceivable to arrange an inflator also on the C pillar,
In this case, the cost is significantly increased.

The present invention has been made in view of the above circumstances, and has as its object to provide a head protection airbag device capable of shortening the time required to complete deployment of an airbag bag without significantly increasing costs.

[0007]

According to the first aspect of the present invention, there is provided a single inflator disposed at a lower portion of a pillar, and stored in a manner extending from the pillar to a roof side and fixed to a body side portion. And a curtain-shaped airbag body in which a plurality of inflation chambers are formed by a non-inflation portion in a direction intersecting a tension line connecting the points. In the gas introduction passage to the inflator, a reinforcing liner tube that extends from the connection with the inflator to a position beyond the upstream expansion chamber near the inflator and supplies gas first from the downstream expansion chamber far from the inflator is provided. It is characterized by having.

Therefore, the reinforcing liner tube provides
The gas is supplied first from the downstream inflation chamber far from the inflator, and the airbag bag inflates and deploys from the downstream inflation chamber. In addition, since the upstream inflation chamber is also lowered with the inflation and deployment of the downstream inflation chamber, the time required for completing the deployment of the airbag bag can be reduced. Further, the time required for completing the deployment of the airbag bag can be shortened only by changing the length of the reinforcing liner tube without significantly changing the shape of the airbag bag, and thus there is no significant cost increase.

According to a second aspect of the present invention, in the head protection airbag apparatus according to the first aspect, the inflator is disposed below the A-pillar, and the airbag bag is for a front seat. And

Therefore, in addition to the contents described in the first aspect, the sudden change portion of the gas flow from the gas introduction passage to the inflation chamber can be shifted to the roof lining portion which is more easily deformed than the pillar garnish, so that the airbag bag is provided. The load due to the high-pressure gas on the A-pillar garnish during body expansion and deployment can be reduced.

According to a third aspect of the present invention, in the head protecting airbag device according to the first aspect, the inflator is disposed below the A-pillar, and the airbag bag is provided with a plurality of front seat inflation chambers. A rear seat expansion chamber is provided, and the reinforcing liner tube extends to a position where gas can be supplied to the downstream expansion chamber in the front seat expansion chamber.

Therefore, in addition to the contents of the first aspect, the gas ejected from the inflator is distributed by the reinforcing liner tube to the downstream expansion chamber and the rear expansion chamber in the front seat expansion chamber far from the inflator. Supplied. As a result, the gas is quickly supplied also to the rear-seat inflation chamber, so that the time required for completing the deployment of the airbag bag can be reduced.

According to a fourth aspect of the present invention, in the head protecting airbag device according to the first aspect, the inflator is disposed below the C-pillar, and the airbag bag is provided with a plurality of front seat inflation chambers. A rear seat expansion chamber, wherein the reinforcing liner tube extends beyond the rear seat expansion chamber to a position where gas can be supplied to the upstream expansion chamber of the front seat expansion chamber, and the front seat expansion chamber is provided. A cross-sectional area of the gas introduction passage between the gas supply passage and the rear-seat expansion chamber is larger than a cross-sectional area of the reinforcing liner tube.

Accordingly, in the initial stage of the deployment of the airbag bag, the gas ejected from the inflator is supplied to the upstream inflation chamber of the front inflation chamber far from the inflator by the reinforcing liner tube, and the front inflation chamber is also provided. The gas is also supplied to the rear-seat expansion chamber from a gap between the gas introduction passage and the reinforcing liner tube between the rear-seat expansion chamber and the rear-seat expansion chamber. As a result, even when the inflator is arranged below the C pillar,
The time required to complete the deployment of the airbag bag can be reduced.

According to a fifth aspect of the present invention, in the head protection airbag device according to the first aspect, the inflator is disposed below the C-pillar, and the airbag bag is provided with a plurality of front seat inflation chambers. A rear seat expansion chamber, wherein the reinforcing liner tube extends beyond the rear seat expansion chamber to a position where gas can be supplied to an upstream expansion chamber of the front seat expansion chamber, and the reinforcing liner tube is provided. Is characterized in that a gas supply port for supplying gas to the rear seat expansion chamber is formed.

Accordingly, the gas ejected from the inflator is supplied to the front seat expansion chamber far from the inflator by the reinforcing liner tube, and is supplied to the rear seat expansion chamber from the gas supply port of the reinforcing liner tube. .
As a result, even when the inflator is disposed below the C-pillar, the time required for completing the deployment of the airbag bag can be reduced.

According to a sixth aspect of the present invention, there is provided a single inflator disposed under the pillar, and a tension line which is stored astride the pillar from the roof side and connects the front and rear fixed points to the body side. And a curtain-shaped airbag body having a plurality of inflation chambers formed by non-inflation portions in a direction intersecting with each other. In the head protection airbag device, gas is introduced into the front seat inflation chamber in the airbag bag body. It is characterized in that the passage and the gas introduction passage to the rear seat expansion chamber are independent of each other.

Therefore, the gas is simultaneously supplied from the independent gas introduction passages to the front-seat expansion chamber and the rear-seat expansion chamber, so that the gas can be quickly supplied also to the expansion chamber far from the inflator, and the airbag bag can be supplied. It can shorten the time required to complete the deployment of the body. Further, by adjusting the cross-sectional areas of the independent gas introduction passages, it is possible to easily adjust the respective deployment timings of the front seat expansion chamber and the rear seat expansion chamber. Further, when the inflator is provided below the A-pillar, an independent gas introduction passage is provided along the A-pillar, so that the occupant head protection area of the A-pillar portion is enlarged.

According to a seventh aspect of the present invention, there is provided the head protection airbag apparatus according to the sixth aspect, wherein a gas introduction passage for the front seat expansion chamber and a gas for the rear seat expansion chamber formed in the airbag bag body. The introduction passage is connected to the inflator via a branch pipe having higher rigidity than the base fabric of the airbag bag body.

Therefore, in addition to the contents described in claim 6, in the branch pipe set outside the airbag body and having higher rigidity than the base fabric of the airbag body, the high-pressure gas from the inflator is supplied to the front-seat expansion chamber. And the gas introduction passage of the rear seat inflation chamber, it is possible to prevent the base fabric of the airbag body from being damaged by the high-pressure gas ejected from the inflator.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A head protection airbag device according to a first embodiment of the present invention will be described with reference to FIGS.

In the drawings, an arrow FR indicates a forward direction of the vehicle, an arrow UP indicates an upward direction of the vehicle, and an arrow IN indicates an inward direction of the vehicle width.

As shown in FIG. 1, 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 provided below the front pillar (A-pillar) 20 near the connection between the 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 is operated.

In this embodiment, the airbag 1
Reference numeral 6 denotes a front-seat head protection airbag bag that protects the head 70A of the occupant 70 seated on the front seat 19. The airbag bag 16 includes an airbag at the middle in the vertical direction when viewed from the side. The longitudinal direction extends across the tension line T connecting the front end fixed point and the rear end fixed point of the bag bag body 16, and a plurality of arc-shaped non-inflated bulges toward the upstream side (front side) near the inflator 14. The parts 24 are formed at predetermined intervals. Further, in the airbag bag body 16, a plurality of front-seat inflation chambers 26, 28, 3, which cross the tension line T by the non-inflation portion 24 when the airbag bag body is deployed.
0 and 32 are formed. The airbag bag 16 has a rear side door glass 3.
3 is a non-expandable portion 34.

The front end portion 16A of the airbag bag 16 is located at the position where the inflator is provided, and the upper end edge of the intermediate portion 16B is located at the front pillar 20 and the roof side rail 3.
8 are arranged. In addition, the front pillar 20
The portion of the airbag bag body 16 arranged along is
A gas introduction passage 40 for sending gas into the front seat expansion chambers 26, 28, 30, 32 is provided. In the gas introduction passage 40, the front seat expansion chambers 26, 28 upstream from the inflator 14 are provided. , 30 are provided. Therefore, the gas ejected from the inflator 14 is supplied to the reinforcing liner tube 4.
2, the air is supplied first from the front seat expansion chamber 32 on the downstream side far from the inflator 14. In addition,
The upper edge of the rear end 16 </ b> C of the airbag body 16 is disposed near a quarter pillar (C pillar) 44.

As shown in FIG. 2, the air bag 16
Is folded in a bellows shape in a substantially vertical direction to be elongated, and is housed straddling the front pillar garnish 46 and the outer side portion 48A of the roof head lining 48 in the vehicle width direction. In addition, at the upper end of the airbag bag body 16,
Attachment portions 16D are formed so as to protrude at predetermined intervals, and these attachment portions 16D are attached to fixing members 4 such as clips and bolts.
9 fixed.

As shown in FIG. 3, the air bag 16
Is the interior side 50A of the front side door glass 50
Is folded in a direction substantially perpendicular to. When the airbag bag 16 is deployed, the airbag bag 16 is opened.
Of the front pillar garnish 46
The gap closed by the weather strip 54 between the airbag bag and the front pillar inner panel 52 is expanded, and the airbag bag body 16 is deployed into the vehicle cabin from the expanded gap.

Reference numeral 60 shown in FIG. 3 is a front pillar outer panel, and reference numeral 62 is a front pillar reinforcement.

As shown in FIG. 4, when the airbag body 16 is deployed, the outer side portion 48A of the roof head lining 48 in the vehicle width direction and the roof side inner are caused by the deployment and inflation force of the airbag body 16. The gap closed by the weather strip 58 with the panel 56 is pushed out, and the airbag bag 16 is deployed into the vehicle cabin from the pushed-out gap.

Reference numeral 64 shown in FIG. 4 is a roof panel, reference numeral 66 is a roof side member, and reference numeral 68 is a roof side rail outer reinforcement.

Next, the operation of the present embodiment will be described. In the head protection airbag device of the present embodiment, when a side impact load of a predetermined value or more acts on the vehicle body side, the side collision is detected by the sensor 12. 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 46 of the front pillar 20 and the vehicle width direction outer portion 48A of the roof head lining 48, and opens the front side door glass. The airbag 50 is swelled in a curtain shape along the side surface 50A of the vehicle interior 50 to protect the head 70A of the occupant 70.

At this time, in the head protection airbag apparatus of the present embodiment, the gas ejected from the inflator 14 passes through the reinforcing liner tube 42 and passes through the inflator 14.
The front-side expansion chamber 3 on the downstream side farther from the inflator 14 than the upstream-side expansion chambers 26, 28, 30 near the upstream side.
Supplied from 2 first. As a result, when the downstream front seat expansion chamber 32 expands and deploys along with the downstream front seat expansion chamber 32, the upstream front seat expansion chamber 30,
28, 26 are also lowered. For this reason, the deployment completion time of the airbag bag body 16 can be shortened.

In the head protection airbag apparatus according to the present embodiment, the additional reinforcing liner tube 42 is simply extended rearward without greatly changing the shape of the airbag bag body 16. Since the time required for completing the deployment of the airbag bag body 16 can be reduced, there is no significant cost increase.

In the head protection airbag device of the present embodiment, the liner tube 42 for reinforcement is extended rearward, so that the gas flow suddenly changing from the gas introduction passage 40 of the airbag body 16 to the inflation chamber. The roof head lining 48, which is easier to deform than the front pillar garnish 46.
Can be shifted to the outside portion 48A in the vehicle width direction, so that the load due to the high-pressure gas acting on the front pillar garnish 46 when the airbag body is inflated and deployed can be reduced.

Next, a second embodiment of the head protection airbag device according to the present invention will be described with reference to FIGS.

The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 5, in this embodiment, a plurality of front-seat inflation chambers 26, 28, 3 of the airbag body 16 are provided.
0, 32, the rear inflation chamber 7 with the non-inflation portion 34 interposed therebetween.
4 and 76 are formed, and between the rear-seat expansion chamber 74 and the rear-seat expansion chamber 76, an arc-shaped non-expandable portion 78 swelling upstream (frontward) is formed. A front seat expansion chamber 32 is provided between the front seat expansion chamber 32 and the rear seat expansion chamber 74.
A gas introduction passage 80 is formed which communicates with the rear seat expansion chamber 74.

Accordingly, as shown in FIG. 6, the gas ejected from the inflator 14 is firstly supplied to the downstream front seat expansion chamber 32 and the upstream rear seat expansion chamber 74 by the reinforcing liner tube 42. It is supplied to.

In the present embodiment, the non-expandable portion 2 formed between the front seat expansion chambers 26, 28, 30, 32 is provided.
4 has a circular arc shape bulging to the downstream side (rearward side) far from the inflator 14, and a lower end 16E of a rear end of the airbag body 16 is connected to a lower part of the quarter pillar 44 by a strap 16F.

Next, the operation of the present embodiment will be described. In the head protection airbag device of the present embodiment, in addition to the operation described in the first embodiment, the gas ejected from the inflator 14 is inflated by the reinforcing liner tube 42 for the front seat on the downstream side far from the inflator 14. It is distributed and supplied to the chamber 32 and the rear-side expansion chamber 74 on the upstream side. As a result,
Since the gas is also quickly supplied to the rear-seat inflation chambers 74 and 76 of the airbag bag 16, the deployment completion time of the airbag bag 16 can be shortened.

As shown in FIG. 7, the non-expandable portion 24 formed in the front seat expansion chambers 26, 28, 30, 32 is
As in the first embodiment, the shape may be an arc bulging toward the upstream side (front side) near the inflator 14.

Next, a third embodiment of the head protection airbag device of the present invention will be described with reference to FIGS.

The same members as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 9, in this embodiment, the inflator 14 is disposed below the quarter pillar 44, and a strap 16 G formed at the lower front end of the airbag bag 16 is disposed below the front pillar 20. Fixed.

As shown in FIG. 8, in the present embodiment, a gas introduction passage 40 is formed above the rear end portion 16C of the airbag bag 16, and the reinforcing liner tube 42 in the gas introduction passage 40 is The upstream side near the inflator 14 from the inflator 14 (see FIG. 9) connected to the rear end of the gas introduction passage 40 and beyond the rear-seat expansion chambers 76 and 74 (in the present embodiment, the inflator 14 is located at the rear of the vehicle). Therefore, it reaches the front seat expansion chamber 32).

Accordingly, the gas ejected from the inflator 14 is supplied first by the reinforcing liner tube 42 from the upstream expansion chamber 32 on the upstream side near the inflator 14.

The rear-seat expansion chamber 74 and the front-seat expansion chamber 3
2 is larger than the cross-sectional area S2 of the reinforcing liner tube 42, and the gas introducing passage 80 and the reinforcing liner tube 42 are connected to each other.
The gas flows between and.

Next, the operation of the present embodiment will be described. In the head protection airbag device of the present embodiment, the gas ejected from the inflator 14 disposed below the quarter pillar 44 is supplied to the upstream seat (rear side) near the inflator 14 by the reinforcing liner tube 42. Expansion chamber 32
And then the other front seat expansion chambers 30, 28, 2
6 and also supplied to the rear-seat expansion chambers 74 and 76 through a gap between the gas introduction passage 80 that connects the rear-seat expansion chamber 74 and the front-seat expansion chamber 32 and the reinforcing liner tube 42. You. As a result, the deployment completion time of the airbag bag 16 can be reduced.

Further, in the head protection airbag device of the present embodiment, the additional reinforcing liner tube 42 is simply extended forward without greatly changing the shape of the airbag bag 16. Since the time required for completing the deployment of the airbag bag body 16 can be reduced, there is no significant cost increase.

Next, a fourth embodiment of the head protection airbag device of the present invention will be described with reference to FIG.

The same members as those in the third embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 10, in this embodiment,
The cross-sectional area S1 of the gas introduction passage 80 communicating the rear seat expansion chamber 74 and the front seat expansion chamber 32, and the reinforcing liner tube 4
2 has a small difference from the cross-sectional area S2, but a gas supply for supplying gas to the rear-seat expansion chambers 74 and 76 is provided at a portion opposed to the rear-seat expansion chambers 74 and 76 for the reinforcing liner tube 42. A plurality of holes 82 as openings are formed. These holes 82 are formed over the entire outer periphery of the reinforcing liner tube 42, and
Regardless of the mounting position of the second airbag body 16 on the airbag body 16, any one of the holes 82 is directed substantially toward the bottom of the rear-seat inflation chambers 74 and 76, so that the gas is reliably and promptly supplied to the rear-seat inflation chamber 76. It is to be sent inside.

Accordingly, the gas ejected from the inflator 14 is supplied to the front-seat expansion chamber 32 near the inflator 14 by the reinforcing liner tube 42, and then supplied to the other front-seat expansion chambers 30, 28, 26. As well as
The air is supplied to the rear seat expansion chambers 74 and 76 through the holes 82.

Next, the operation of the present embodiment will be described. In the head protection airbag device of the present embodiment, the gas ejected from the inflator 14 disposed below the quarter pillar 44 is supplied to the upstream seat (rear side) near the inflator 14 by the reinforcing liner tube 42. Expansion chamber 32
And then the other front seat expansion chambers 30, 28, 2
6 and through a hole 82 to the rear inflation chamber 7
4, 76. As a result, the airbag bag 16
Deployment completion time can be shortened.

In the head protection airbag device of the present embodiment, an additional reinforcing liner tube 42 is extended forward to form a hole 82 without significantly changing the shape of the airbag bag 16. By simply doing so, the time required to complete the deployment of the airbag body 16 can be shortened without any significant cost increase.

In the present embodiment, the hole 82 is formed as a gas supply port in the reinforcing liner tube 42. Instead of the hole 82, another gas supply port such as a slit, a notch, or a branch portion is connected to the reinforcing liner tube. It may be formed in the tube 42.

Next, a fifth embodiment of the head protection airbag device of the present invention will be described with reference to FIG.

Note that the same members as those of the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 11, in the present embodiment,
A gas introduction passage 40 of the airbag bag body 16 connected to a single inflator 14 disposed below the front pillar 20 serves to supply gas to the front-seat inflation chambers 26, 28, 30, 32. The first gas introduction passage 84 is divided into a first gas introduction passage 84 and a second gas introduction passage 86 for supplying gas to the rear-seat expansion chambers 74 and 76.
4 and the second gas introduction passage 86 are independent of each other.

Next, the operation of the present embodiment will be described. In the head protection airbag device of the present embodiment, when a side impact load of a predetermined value or more acts on the vehicle body side, the side collision is detected by the sensor 12. For this reason, the inflator 14 operates and a predetermined amount of gas is ejected.

At this time, in the head protection airbag device of this embodiment, the gas ejected from the inflator 14 is supplied to the front seat inflation chamber 26 through the independent first gas introduction passage 84,
At the same time, the air is supplied to the rear expansion chambers 74 and 76 through the second gas introduction passage 86. As a result, gas can be quickly supplied to the rear seat inflation chambers 74 and 76 far from the inflator 14, and the time required to complete deployment of the airbag bag can be reduced.

In the head protection airbag device of the present embodiment, the gas introduction passage 40 is connected to the first gas introduction passage 84 and the second gas introduction passage 86 without largely changing the shape of the airbag bag 16. Since the time required for completing the deployment of the airbag bag body 16 can be easily reduced simply by dividing the airbag bag body into two parts, there is no significant cost increase.

Further, in this embodiment, the cross-sectional areas of the independent first gas introduction passage 84 and the second gas introduction passage 86 are adjusted so that the front seat expansion chambers 26, 28, 3
The deployment timing of the expansion chambers 0, 32 and the rear-seat expansion chambers 74, 76 can be easily adjusted. Furthermore, since the independent gas introduction passage is arranged along the front pillar 20, the area for protecting the occupant head at the front pillar 20 is enlarged.

Next, a sixth embodiment of the head protection airbag device of the present invention will be described with reference to FIG.

Note that the same members as those of the fifth embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 12, in the present embodiment,
The gas introduction passage 40 of the airbag bag body 16 connected to the single inflator 14 disposed below the quarter pillar 44 serves to supply gas to the front seat inflation chambers 26, 28, 30, 32. The first gas introduction passage 88 is divided into a first gas introduction passage 88 and a second gas introduction passage 90 for supplying gas to the rear-seat expansion chambers 74 and 76.
8 and the second gas introduction passage 90 are independent of each other.

Next, the operation of the present embodiment will be described. In the head protection airbag device of the present embodiment, the inflator 1
4 blows out from the first gas introduction passage 88
And at the same time, is supplied to the rear-seat expansion chambers 74 and 76 via the second gas introduction passage 90. As a result, gas can be quickly supplied to the front seat inflation chambers 26, 28, 30, and 32 far from the inflator 14, and the time required to complete deployment of the airbag bag can be reduced.

In the head protection airbag device of the present embodiment, the gas introduction passage 40 is connected to the first gas introduction passage 88 and the second gas introduction passage 90 without greatly changing the shape of the airbag bag 16. Since the time required for completing the deployment of the airbag bag body 16 can be easily reduced simply by dividing the airbag bag body into two parts, there is no significant cost increase.

In this embodiment, the cross-sectional areas of the independent first gas introduction passage 88 and the second gas introduction passage 90 are adjusted to adjust the front seat expansion chambers 26, 28, 3.
The deployment timing of the expansion chambers 0, 32 and the rear-seat expansion chambers 74, 76 can be easily adjusted.

Next, a seventh embodiment of the head protection airbag device of the present invention will be described with reference to FIGS.

The same members as those in the fifth embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 14, in this embodiment,
A branch pipe 92 is provided at a connecting portion between the single inflator 14 and the airbag body 16 disposed below the front pillar 20.
Are arranged.

As shown in FIG. 13, this branch pipe 92
Is made of a material having a higher rigidity than the base fabric of the airbag bag body 16, for example, a metal such as aluminum or iron, a resin, or the like. One end 92 </ b> A of the branch pipe 92 is connected to the inflator 14. I have. Further, a first gas introduction passage 84 of the airbag bag body 16 is connected to one end 92B of the branch pipe 92 branched into two branches, and the other end 92C of the two branches is connected to the other end 92C. The second gas introduction passage 86 of the airbag bag 16 is connected. The first gas introduction passage 84 and the second gas introduction passage 86 are respectively connected to ends 92B and 92C of the branch pipe 92 by a metal ring 94.
Is caulked.

Next, the operation of the present embodiment will be described. In the head protection airbag device of the present embodiment, the inflator 1
The gas blown out from the fourth gas passage 4 communicates with the first gas introduction passage 84 communicating with the front seat expansion chambers 26, 28, 30, 32 and the rear seat expansion chambers 74, 76 via the highly rigid branch pipe 92. And a second gas introduction passage 86. That is, in the present embodiment, since the branch portion of the gas is set to the highly rigid branch pipe 92 provided outside the airbag body 16, the base fabric of the airbag body 16 by the high-pressure gas ejected from the inflator 14 is formed. Damage can be prevented.

In this embodiment, the inflator 14
Is arranged below the front pillar 20. Alternatively, as shown in FIG. 15, the inflator 14 is arranged below the quarter pillar 44, and the inflator 14
And a branch pipe 92 may be provided between the first gas introduction passage 88 and the second gas introduction passage 90 of the airbag bag 16.

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, when configuring the inflated portion and the non-inflated portion of the airbag bag body 16, a predetermined portion of the base fabric may be configured by sewing and bonding, or by changing the weave of the base fabric. You may comprise.

[0078]

According to the first aspect of the present invention, there is provided a single inflator disposed at a lower portion of a pillar and a tension stored between the pillar and a roof side to connect a front and rear fixed point to a body side portion. A curtain-shaped airbag body having a plurality of inflation chambers formed by non-inflation portions in a direction intersecting with the line, wherein a gas introduction passage to each inflation chamber in the airbag bag body is provided. Inside, extending from the connection with the inflator to a position beyond the upstream expansion chamber close to the inflator, and having a reinforcing liner tube for supplying gas first from the downstream expansion chamber far from the inflator, significant It has an excellent effect that the time required for completing the deployment of the airbag bag can be shortened without increasing the cost.

According to a second aspect of the present invention, in the head protection airbag device according to the first aspect, the inflator is disposed below the A-pillar and the airbag bag is for a front seat. In addition to the effects described above, there is an excellent effect that the load due to the high-pressure gas on the A-pillar garnish during the inflation and deployment of the airbag body can be reduced.

According to a third aspect of the present invention, in the head protecting airbag device according to the first aspect, the inflator is disposed below the A-pillar, and the airbag bag body includes a plurality of front seat inflation chambers and a rear seat. And a reinforcing liner tube extending to a position where gas can be supplied to the downstream expansion chamber in the front seat expansion chamber. This also has an excellent effect that the gas can be supplied quickly and the time required for completing the deployment of the airbag bag can be shortened.

According to a fourth aspect of the present invention, in the head protection airbag device according to the first aspect, the inflator is disposed below the C-pillar, and the airbag bag body includes a plurality of front seat inflation chambers and a rear seat. A reinforcing liner tube extending beyond the rear seat expansion chamber to a position where gas can be supplied to the upstream expansion chamber of the front seat expansion chamber, and the front seat expansion chamber and the rear seat Since the cross-sectional area of the gas introduction passage between the air inflation chamber and the reinforcing liner tube is larger than the cross-sectional area of the reinforcing liner tube, even if the inflator is disposed below the C-pillar, the cost is not significantly increased and the airbag bag is not increased. It has an excellent effect that the time required for completing the development of the body can be shortened.

According to a fifth aspect of the present invention, in the head protection airbag device according to the first aspect, the inflator is disposed below the C-pillar, and the airbag bag body includes a plurality of front seat inflation chambers and a rear seat. And a reinforcing liner tube extends beyond the rear seat expansion chamber to a position where gas can be supplied to the upstream expansion chamber of the front seat expansion chamber, and the reinforcing liner tube has a rear seat Since the gas supply port for supplying gas to the inflation chamber is formed, even if the inflator is arranged below the C-pillar, the time required to complete the deployment of the airbag bag body does not increase significantly without increasing the cost. It has an excellent effect that it can be shortened.

According to a sixth aspect of the present invention, there is provided a single inflator disposed below the pillar, and a tension line which is stored astride the pillar from the roof side and connects the front and rear fixed points to the body side. A curtain-shaped airbag body having a plurality of inflation chambers formed by non-inflating portions in a direction intersecting with each other, and a gas introduction passage to the front seat inflation chamber in the airbag bag body. Since the gas introduction passage to the rear-seat inflation chamber is independent of each other, there is an excellent effect that the time required for completing the deployment of the airbag body can be reduced without significantly increasing the cost. In addition, it is easy to adjust the deployment timing of the front-seat expansion chamber and the rear-seat expansion chamber, and when the inflator is disposed below the A-pillar, the area for protecting the occupant head of the A-pillar section is expanded. Has an effect.

According to a seventh aspect of the present invention, in the head protection airbag apparatus according to the sixth aspect, a gas introduction passage for the front seat expansion chamber and a gas introduction for the rear seat expansion chamber formed in the airbag bag body. Since the passage is connected to the inflator through a branch pipe having a higher rigidity than the base fabric of the airbag bag body, in addition to the effect of claim 6, damage to the base fabric of the airbag bag body caused by high-pressure gas ejected from the inflator can be achieved. It has an excellent effect that it can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a state where an airbag body is inflated and deployed in a head protection airbag device according to a first embodiment of the present invention, as viewed from a vehicle interior side.

FIG. 2 is a schematic side view of the head protection airbag device according to the first embodiment of the present invention, showing a stored state of the airbag body, as viewed from a vehicle interior side.

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 of FIG. 2;

FIG. 5 is a side view showing an airbag bag of a head protection airbag device according to a second embodiment of the present invention.

FIG. 6 is a schematic side view showing a state in which an airbag body is inflated and deployed in a head protection airbag device according to a second embodiment of the present invention, as viewed from a vehicle interior side.

FIG. 7 is a side view showing an airbag body of a head protection airbag device according to a modification of the second embodiment of the present invention.

FIG. 8 is a side view showing an airbag bag of a head protection airbag device according to a third embodiment of the present invention.

FIG. 9 is a schematic side view showing a state in which an airbag body is inflated and deployed in a head protection airbag device according to a third embodiment of the present invention, as viewed from a vehicle interior side.

FIG. 10 is a side view showing an airbag bag of a head protection airbag device according to a fourth embodiment of the present invention.

FIG. 11 is a schematic side view showing a state in which an airbag body is inflated and deployed in a head protection airbag device according to a fifth embodiment of the present invention, as viewed from the inside of a vehicle cabin.

FIG. 12 is a schematic side view showing a state where an airbag body is inflated and deployed in a head protection airbag device according to a sixth embodiment of the present invention, as viewed from the inside of a vehicle cabin.

FIG. 13 is an enlarged perspective view showing a connection part by a branch pipe of a head protection airbag device according to a seventh embodiment of the present invention.

FIG. 14 is a schematic side view showing a state in which an airbag body is inflated and deployed in a head protection airbag device according to a seventh embodiment of the present invention, as viewed from a vehicle interior side.

FIG. 15 is a schematic side view of a head-protecting airbag device according to a modification of the seventh embodiment of the present invention, showing a state where an airbag body is inflated and deployed, as viewed from the inside of a vehicle cabin.

FIG. 16 is a schematic side view showing a stored state of an airbag body in a head protection airbag device according to a conventional embodiment.

[Explanation of symbols]

 Reference Signs List 10 head protection airbag device 12 sensor 14 inflator 16 airbag bag 18 center pillar (B pillar) 20 front pillar (A pillar) 22 instrument panel 24 non-inflating section 26 front seat inflating section 28 front seat inflating section 30 front seat inflatable part 32 front seat inflatable part 34 non-inflatable part 38 roof side rail 40 gas introduction passage 42 reinforcing liner tube 44 quarter pillar (C pillar) 46 front pillar garnish 48 roof head lining 74 rear seat expansion chamber 76 rear seat expansion chamber 78 non-expansion part 80 gas introduction passage 82 hole (gas supply port) 84 first gas introduction passage 86 second gas introduction passage 88 first gas introduction passage 90 second gas introduction passage 92 branch pipe

Claims (7)

[Claims] 1. A single inflator disposed at a lower portion of a pillar, and a non-expandable portion in a direction intersecting a tension line which is stored astride the pillar from a roof side and connects a front-rear fixed point to a body side portion. And a curtain-shaped airbag body having a plurality of inflation chambers formed therein. The airbag apparatus further comprising: a connection portion for connecting to an inflator in a gas introduction passage to each of the inflation chambers in the airbag bag body. A headliner airbag device, comprising a reinforcing liner tube extending from the airbag to a position beyond the upstream inflation chamber near the inflator and supplying gas from the downstream inflation chamber far from the inflator. 2. The head protection airbag device according to claim 1, wherein the inflator is disposed below the A-pillar, and the airbag bag is for a front seat. 3. The inflator is disposed below the A-pillar, the airbag bag includes a plurality of front-seat inflation chambers and a rear-seat inflation chamber, and the reinforcing liner tube is a front-seat inflation chamber. 2. The head protection airbag device according to claim 1, wherein the airbag device extends to a position where gas can be supplied to the downstream expansion chamber. 4. The inflator is disposed below a C-pillar, the airbag bag includes a plurality of front-seat inflation chambers and a rear-seat inflation chamber, and the reinforcing liner tube is a rear-seat inflation chamber. And a gas introduction passage extending between the front-seat expansion chamber and the rear-seat expansion chamber so as to supply gas to the upstream-side expansion chamber of the front-seat expansion chamber. 2. The head protection airbag device according to claim 1, wherein the cross-sectional area of the liner tube is larger than the cross-sectional area. 5. The inflator is disposed below a C-pillar, the airbag bag includes a plurality of front-seat inflation chambers and a rear-seat inflation chamber, and the reinforcing liner tube is a rear-seat inflation chamber. And a gas supply port for supplying gas to the rear-seat expansion chamber is formed in the reinforcing liner tube so as to be able to supply gas to the upstream-side expansion chamber of the front-seat expansion chamber. 2. The head protection airbag device according to claim 1, wherein: 6. A single inflator disposed under the pillar, and a non-expanding portion which is stored astride the pillar from the roof side and intersects with a tension line connecting the front and rear fixed points to the body side. And a curtain-shaped airbag body having a plurality of inflation chambers formed therein, wherein a gas introduction passage to the front seat inflation chamber in the airbag bag body, and a rear seat inflation. A head protection airbag device, wherein a gas introduction passage to a chamber is independent of each other. 7. A gas inlet passage of the front seat inflation chamber and a gas inlet passage of the rear seat inflation chamber formed in the airbag bag through a branch pipe having higher rigidity than the base fabric of the airbag bag. The head protection airbag device according to claim 6, wherein the airbag device is connected to an inflator.