JP3396595B2 - Head protection side airbag device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention causes a gas to be ejected from an inflator when a predetermined high load is applied to a side portion of a vehicle body, and the gas causes the air bag body to form a curtain along the roof side rail portion from the pillar portion. The present invention relates to a head protection side airbag device to be inflated.

[0002]

2. Description of the Related Art An airbag bag stored in a folded state extending from a front pillar portion to a roof side rail portion in order to improve a passenger's head protection performance when a predetermined high load is applied to a vehicle body side portion. An occupant protection device that expands the body like a curtain along the windshield has already been proposed. In the following, WO9 disclosing an occupant protection device of this type
The structure shown in 6/26087 will be described.

As shown in FIG. 14, the occupant protection device 100 has a long duct 10 extending from a front pillar portion 102 to a roof side rail portion 104.
6, an airbag bag 112 that is stored in the duct 106 in a folded state and is fixed to the vehicle body side at a front end fixing point 108 and a rear end fixing point 110, and a hose 114.
An inflator 116 that is connected to the rear end of the duct 106 via a pipe and ejects gas when a predetermined high load acts on the vehicle body side, and one end is fixed to the vehicle body side and the other end is an airbag bag. The belt-shaped strap 118 fixed to the rear end of the body 112 is a main component. Further, the air bag body 112 is configured by connecting a plurality of cells 120, each of which is formed in a substantially cylindrical shape and is arranged with the substantially vehicle up-down direction as a longitudinal direction.

With the above structure, when a predetermined high load is applied to the side portion of the vehicle body, gas is ejected from the inflator 116. For this reason, the gas ejected from the hose 114
And through the duct 106 into the cells 120 of the airbag bag 112 in the folded state. As a result, each cell 120 expands into a substantially cylindrical shape with the vehicle up-down direction as the longitudinal direction, whereby the airbag bag 112 expands in a curtain shape along the windshield 122. Further, the strap 118 is provided at the rear end of the airbag 112.
The rear end side of the air bag body 112 is surely arranged inside the upper part of the center pillar portion 124 because it is connected to the vehicle body side via the.

[0005]

However, in the head protection side airbag device as described above, since the airbag bag body folded and stored in a small size is instantly deployed, the airbag is initially inflated. The internal pressure of the bag rises instantly. In particular, since the internal pressure becomes extremely high at a portion close to the inflator, a large impact load is likely to act on the joint portion of the base fabric forming the airbag bag at this portion, and the base portion is used as the starting point. It is conceivable that the cloth may be torn or misaligned.

In view of the above facts, an object of the present invention is to provide a head protection side airbag device which can prevent the base cloth from being torn and misaligned when the airbag bag is deployed.

[0007]

According to a first aspect of the present invention, base fabrics are joined in a bag shape and front and rear end portions are fixed to the front and rear of a vehicle side portion, respectively, and the front and rear fixing points are connected. An inflator in which a curtain-shaped airbag bag having a plurality of substantially parallel cylindrical inflating portions that cross a tension line is stored while straddling a pillar and a roof side rail, and is disposed below a belt line of the pillar at the time of a side collision. Is a head protection side airbag device that inflates and deploys between an occupant's head and a vehicle side portion, in a portion of the airbag bag body close to the inflator, along the pillar mounting portion. A shock absorbing portion that absorbs a shock when the airbag bag is deployed , the shock absorbing portion being outside the connecting portion of the base cloth.
Rupture due to deployment of the airbag bag at
It is characterized in that it is a folded portion sewn with a thread .

Accordingly, the air bag body initially deployed, the portion adjacent to the inflator of the air bag body, when an impact load is applied by the gas pressure, folding provided along the pillar mounting portion at a site close to the inflator Broken yarn
Is broken and part of the impact load is absorbed. As a result,
The impact load acting on the joint portion of the base cloth is reduced, and the base cloth can be prevented from breaking and misalignment. Also, the strength of the broken yarn
The impact absorption capacity of the impact absorption part can be changed by changing the degree and the number.
Easy to adjust.

[0009]

[0010]

[0011] According to a second aspect of the invention, the head protection side air bag device according to claim 1, wherein the folded portion mounting portion to the pillar upper and said inflator-side edge of the air bag body It is characterized in that it is set on the side of the inflator from the vicinity of the center of.

Therefore, since the folded-back portion is not set in the upper portion of the pillar that may come into contact with the head of the occupant, this portion can be reliably covered by the expanded airbag bag.

[0013]

[0014]

[0015]

[0016]

According to a third aspect of the present invention, a plurality of base fabrics are joined together in a bag shape, front and rear end portions thereof are respectively fixed to the front and rear of the vehicle side portion, and a plurality of tension lines crossing the front and rear fixing points are crossed. A curtain-shaped airbag bag having substantially parallel cylindrical inflating portions is stored while straddling a pillar and a roof side rail, and at the time of a side collision, an inflator arranged below the belt line of the pillar is operated to operate the occupant's head. A head protection side airbag device that inflates and deploys between a vehicle portion and a vehicle side portion, and has an auxiliary cloth disposed in a portion of the airbag bag proximate to the inflator. The auxiliary gas supply passage is formed by a connecting means that is adjacent to the base cloth connecting portion and is broken when the airbag bag is deployed, and the auxiliary gas supply passage has a cross-sectional circumference of the base cloth on the outer periphery thereof. Gas supply formed Is characterized in that the is smaller than the cross-sectional circumference.

Therefore, when the airbag bag is deployed, the folded and stored airbag bag body is deployed from the inflator side. At this time, the cross-sectional circumference of the auxiliary gas supply passage formed by the auxiliary cloth arranged in the vicinity of the inflator in the airbag bag is equal to the cross-sectional circumference of the gas supply passage formed by the base cloth on the outer peripheral portion thereof. Since it is set smaller than the length, the impact load first acts on the joining means of the auxiliary cloth, the joining means breaks, and a part of the impact load is absorbed. As a result,
The impact load acting on the joint portion of the base cloth is reduced, and the base cloth can be prevented from breaking and misalignment. Further, by providing the auxiliary cloth, the airbag bag can be reinforced and the sealing property is improved.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a head protection side airbag device of the present invention will be described with reference to FIGS.

In the figure, an arrow FR indicates a vehicle front direction, an arrow UP indicates a vehicle upward direction, and an arrow IN indicates a vehicle width inner direction.

As shown in FIG. 3, the head-protecting side airbag apparatus 10 of the first embodiment has a sensor 12 for detecting a side collision state and a columnar inflator for ejecting gas when actuated. 14 and an airbag bag body 16 folded by a predetermined folding method as main constituent elements. The sensor 12 is a center pillar (B
It is arranged near the lower end of the pillar 18 and detects the side collision state when a side collision load of a predetermined value or more acts on the side portion of the vehicle body.

The inflator 14 is arranged near the connecting portion between the front pillar (A 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 activated.

As shown in FIG. 1, the airbag bag body 16
Is a single base cloth 17 folded in two at the lower end, and the vicinity of the overlapped peripheral edge portion 17A and the rear portion 17B are attached to the suture thread 1
It is formed by sewing 9 together.

As shown in FIG. 3, the airbag bag body 16
Are formed in a substantially parallelogram shape. Further, in a side view of the airbag body 16 in the vertical direction, a tension line T connecting a front end fixing point and a rear end fixing point of the airbag body 16 is traversed and a vertical direction of the airbag body is defined as a longitudinal direction. The plurality of non-inflatable portions 24 are formed at predetermined intervals so that the non-inflatable portions 24 form a plurality of substantially parallel cylindrical inflatable portions that cross the tension line T when the airbag bag is deployed. It has become.

As shown in FIG. 1, the airbag bag body 16
The non-inflatable part 24 is formed by suturing with a suture thread 25.

As shown in FIG. 2, the airbag bag body 16
Is folded in a predetermined folding manner to have a long shape, and is accommodated across the front pillar garnish 26 and the roof lining or roof side rail garnish (not shown). The folded airbag bag 16 may be housed in a case (not shown) so as to straddle the front pillar garnish 26 and the roof lining or the roof side rail garnish.

As shown in FIG. 4, the airbag bag body 16
The front end portion 16A of the is disposed at the inflator-arranged position so that the gas ejected from the inflator 14 flows in,
The intermediate portion 16B is arranged along the front pillar 20 and the roof side rail 28, and the rear end portion 16C is arranged near the quarter pillar (C pillar) 30.

As shown in FIG. 2, the front pillar 20.
The pillar outer panel 32 having a hat-shaped cross section arranged on the outside of the vehicle compartment and a substantially flat plate-shaped pillar inner panel 34 arranged on the vehicle interior side have a closed cross-section structure. The front portion of the bag bag body 16 is attached. Specifically, the mounting hole 33 formed in the pillar inner panel 34, and the airbag bag 16
And a weld nut 37 that is screwed into the bolt 36. The bolt 36 is inserted through the mounting hole 35 formed at the upper edge of the
Thus, the front portion of the airbag bag body 16 is fixed to the pillar inner panel 34. Similarly, the upper edge portion of the airbag bag 16 is also attached to the inner panel of the roof side rail 28.

As shown in FIG. 1, the airbag bag body 16
A shock absorbing portion 38 that absorbs a shock at the time of deploying the airbag bag is formed along a mounting hole 35 for mounting the front pillar, at a position close to the inflator 14.

As shown in FIG. 2, this shock absorbing portion 38
On the outer side of the sewn portion 42 as the joint portion of the base cloth 17, the folded portion 46 is sewn by the rupture thread 44 ruptured by the expansion of the airbag body 16.

Next, the operation of the first embodiment will be described.
In the head protection side airbag device of the first embodiment,
When an impact load is applied to a portion of the airbag bag body 16 in the vicinity of the inflator 14 by the gas pressure at the initial stage of the airbag bag deployment, the impact absorption provided along the front pillar mounting portion in the portion of the airbag bag body 16 in the vicinity of the inflator 14 is absorbed. The broken yarn 44 of the folded-back portion 46 as the portion 38 is broken, and a part of the impact is absorbed.

As a result, as shown in FIG.
4 is broken (TL), the stitched portion 42 of the base cloth 17 is
Since the rise of the impact F that acts on the base cloth 17 is suppressed,
The maximum value F1 of the impact load (tensile load) F acting on the sewn portion 42 is the binding of the base fabric of the airbag bag, which is not shown in FIG. It becomes smaller than the maximum value S1 of the impact load S acting on the part.

Therefore, in the first embodiment, the base cloth 17
The impact acting on the sutured portion 42 is reduced, and the base cloth 17 can be prevented from being torn or misaligned. Therefore, the internal pressure holding time of the airbag bag 16 can be extended. Further, by changing the strength and the number of the broken yarns 44, the shock absorbing portion 3
The shock absorption capacity of No. 8 can be easily adjusted.

In the first embodiment, the folded portion 46 sewn by the breaking thread 44 that breaks due to the expansion is formed in the entire airbag bag 16 along the attachment portion to the front pillar 20. Instead of this, as shown in FIG. 6, the folded portion 46 sewn by the breaking thread 44 is provided near the center between the front end 16D of the airbag bag 16 on the inflator 14 side and the attachment portion 16E to the upper end of the front pillar. It may be set only in the region L closer to the inflator 14. In this case, since the folded-back portion 46 is not set in the airbag bag body 16 in the upper portion of the front pillar that may come into contact with the head of the occupant, the airbag bag body in which this portion is deployed is provided. It can be surely covered by 16.

Further, in the first embodiment, the shock absorbing portion 3
8 is composed of the folded-back portion 46 sewn by the breaking thread 44 that breaks due to the expansion of the airbag bag 16,
The impact absorbing portion 38 is not limited to this, and the airbag bag 1
It may be composed of a folded portion joined by an adhesive which is broken by the development of 6. Also, the shape of the folded portion is also shown in FIG.
The shape is not limited to.

Further, as shown in FIG. 7, the shock absorbing portion 3
8 may be formed of a mounting hole 47 formed in the upper edge portion of the airbag body 16. Specifically, the mounting hole 47 includes a large diameter portion 47A through which the bolt 36 penetrates, and a long small diameter portion 47B formed continuously with the large diameter portion 47A. Bag bag body 16 has 3 bolts
6 is moved in the direction of arrow A in FIG. 7, and when it reaches the position of the chain double-dashed line, the small diameter portion 4 of the mounting hole 47 is
7B is spread and absorbs the shock, and the base cloth 17
The impact acting on the sutured portion 42 may be reduced. In FIG. 7, in order to facilitate understanding,
It is shown in a state where the bolt 36 is moved in the opposite direction.

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

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

As shown in FIGS. 8 and 9, in the second embodiment, the airbag bag 50 is formed by folding one base cloth 52 into two at the lower end, and a predetermined portion of the base cloth 52. The front pillars 20 are joined by connecting the
Further, a passage portion 50A extending along the roof side rail 28 and a plurality of substantially parallel cylindrical expansion portions 50B extending downward from the passage portion 50A and crossing a tension line connecting front and rear fixing points are formed. . Therefore, the gas from the inflator 14 is supplied to each cylindrical inflating portion 50B through the passage portion 50A, and the airbag bag body 50 is inflated and deployed between the occupant head portion and the vehicle side portion. ing.

As shown in FIG. 9 (A), inside the passage portion 50A of the air bag body 50, as a stress relieving means that is adjacent to the joint portion 54 of the base cloth 52 and breaks when the air bag body is deployed. , The opposing base fabrics 52 are connected by the breaking yarn 56 having a predetermined length, and as shown in FIG. 9B, the breaking yarn 56 is tensioned immediately before the airbag bag 50 is completely deployed. As a result, the broken yarn 56 is broken as shown in FIG. 9 (C). In the cylindrical inflating portion 50B of the airbag 50, a rupture thread 56 of a predetermined length is provided as a stress relieving means which is adjacent to the connecting portion 54 of the base cloth 52 and ruptures when the airbag is deployed. Opposing base fabrics 52 are connected.

Next, the operation of the second embodiment will be described.
In the second embodiment, the gas from the inflator 14 is
As shown in FIG. 9 (B), when the air bag body 50 is supplied to each cylindrical inflating portion 50B via the passage portion 50A and inflates and deploys between the occupant head portion and the vehicle side portion. Immediately before the airbag 50 is completely deployed, tension is applied to the breaking yarn 56, and as shown in FIG.
Breaks.

As a result, as shown in FIG. 10, the base cloth 5
The impact load (tension) P acting on the breaking yarn 56 of No. 2 reaches the breaking impact load value F2 and the breaking yarn 56 breaks, but the breaking of the breaking yarn 56 causes the shock load acting on the joint portion 54 of the base cloth 52. Since a part of the air bag 50 is absorbed,
The maximum value F1 of the impact load F acting on the joint portion 54 of the base cloth 52 when the sheet is completely deployed can be suppressed to be lower than the breaking impact load value F2 of the joint portion 54 of the base cloth 52. Therefore, it is possible to prevent the base cloth 52 from being torn or misaligned.

The broken line in FIG. 10 shows the impact load S acting on the joint portion 54 of the base cloth 52 when the joint by the broken yarn 56 is not performed.

Further, in the second embodiment, since the air bag body 50 is made of one base cloth 52, as compared with the case where the air bag body is made of two base cloths, the base cloth 52 is bonded. The part 54 is reduced. As a result, it is possible to reduce the area where the broken yarn 56 is provided, and the productivity is improved. Further, in the second embodiment, the airbag bag body 50 is configured by folding one piece of the base cloth 52 in two at the lower end and joining the peripheral edge portions by stitching or bonding. It can also be applied to a so-called knitting bag constructed by knitting.

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

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

As shown in FIG. 11, in the third embodiment, the auxiliary cloth 60 is arranged in the airbag bag 16 at a position close to the inflator 14.

As shown in FIG. 12, the auxiliary cloth 60 is folded in two at the lower end and is sewn together with the base cloth 17 with the suture thread 19. Further, the auxiliary cloth 60 is the joint portion 54 of the base cloth 17.
Adjacent to the auxiliary gas supply passage 62 by a breaking thread 61 as a breaking connecting means that breaks when the airbag bag is deployed,
63 is formed. This auxiliary gas supply path 62, 63
The cross-sectional circumference lengths L1 and L2 of the gas supply passages 64 and 65 formed by the base cloth 17 formed on the outer peripheral portion of the
It is set smaller than 3 and L4.

Next, the operation of the third embodiment will be described.
In the third embodiment, when the airbag bag is deployed, the folded and stored airbag bag body 16 is deployed from the inflator side. At this time, the cross-sectional circumferential lengths L1 and L of the auxiliary gas supply passages 62 and 63 formed by the auxiliary cloth 60 arranged at the portion close to the inflator 14 in the airbag body 16
2 is set to be smaller than the sectional circumferential lengths L3 and L4 of the gas supply passages 64 and 65 formed on the outer peripheral portions thereof, the impact load due to the gas pressure first acts on the joint portion of the auxiliary cloth 60 by the breaking yarn 61. The broken yarn 61 is broken and part of the impact load is absorbed.

As a result , the auxiliary fabric 60 is formed by the broken yarn 61.
The impact load acting on the sewn portion reaches the maximum value (breakage value) at a predetermined time T1 and the breakage yarn 61 breaks. Due to the breakage of the breakage yarn 61, the impact load acting on the joint portion 54 of the base cloth 17 is reduced. Partly absorbed. Therefore, as shown in FIG.
As described above, the maximum value of the impact load F acting on the joint portion 54 of the base fabric 17 by the completion of the deployment of the airbag bag body 16 (T2) is the same as that of the third embodiment shown by the broken line in FIG. It becomes smaller than the maximum value S1 of the impact load S that acts on the joint portion of the base cloth of the airbag bag that does not have it.

Therefore, in the third embodiment, the base cloth 17
The impact load acting on the joint portion 54 is reduced, and the base cloth 17 can be prevented from breaking and misalignment. Also, the auxiliary cloth 6
By providing 0, the airbag bag 16 can be reinforced and the sealing property is improved.

In the above, the present invention has been described in detail with respect to specific embodiments, but the present invention is not limited to such embodiments, and various other embodiments within the scope of the present invention. It is obvious to a person skilled in the art that For example, the air bag body may be formed by bonding two base cloths around each other by bonding, stitching or the like, and the shape is not limited to the substantially parallelogram shape. Further, the airbag bag may be extended rearward to protect the heads of passengers seated in the front seats and the rear seats. Further, a head protection airbag device for the rear seats, in which the airbag bag is stored while straddling the quarter pillar (C pillar) and the roof side rail, and the inflator is disposed below the belt line of the quarter pillar. Is also applicable. The belt line
Is the lower end of the side window of the vehicle, that is, the door panel.
A line passing through the upper end of the line.

[0053]

According to the first aspect of the present invention, a plurality of base cloths are joined in a bag shape, front and rear end portions thereof are fixed to the front and rear of the vehicle side portion, and a plurality of tension lines crossing the front and rear fixing points are crossed. The curtain-shaped airbag bag body having substantially parallel cylindrical inflating parts is stored while straddling the pillar and the roof side rail, and at the time of a side collision, the inflator arranged below the belt line of the pillar is operated to operate the occupant's head. A head protection side airbag device that is inflated and deployed between a vehicle part and a vehicle side part,
An impact absorbing part that absorbs the impact load when the airbag bag is deployed is provided along the pillar mounting part near the inflator of the airbag bag , and the impact absorbing part joins the base fabric.
Breaks due to the expansion of the airbag bag on the outside of the section
Since the folded portion is sewn with the breaking thread, it has an excellent effect of preventing the base cloth from being torn and misaligned when the airbag bag is deployed. Also shock absorption
It has an excellent effect that the shock absorption capacity of the parts can be easily adjusted.
Have fruit.

[0054]

[0055] According to a second aspect of the invention, near the center of the head protection side air bag device according to claim 1, the folded portion is attachment to the end portion and the pillar upper end of the inflator side of the air bag body Since it is set on the side closer to the inflator, in addition to the effect described in claim 2, it is possible to reliably cover the upper part of the pillar that may come into contact with the head of the occupant with the expanded airbag bag. Have the effect.

[0056]

[0057]

According to a third aspect of the present invention, the base fabrics are joined together in a bag shape, the front and rear end portions thereof are fixed to the front and rear of the vehicle side portion respectively, and a plurality of substantially crossing tension lines connecting the front and rear fixing points are formed. A curtain-shaped airbag body having parallel cylindrical inflatable portions is stored while straddling a pillar and a roof side rail, and at the time of a side collision, an inflator arranged below the belt line of the pillar is actuated to act as an occupant's head. A head protection side airbag device that expands and deploys between a vehicle side portion and an auxiliary cloth disposed in a portion of the airbag bag close to an inflator, and a base cloth is bonded to the auxiliary cloth. The auxiliary gas supply passage is formed by a connecting means that is ruptured at the time of deploying the airbag bag adjacent to the portion, and the cross-sectional circumferential length of the auxiliary gas supply passage is the outer periphery of the gas supply passage formed by the base cloth. Smaller than cross section circumference Because it is constant, it has an excellent effect that it is possible to prevent breakage of the base fabric when the air bag body deploying, the misalignment. In addition, the airbag bag can be reinforced and the sealing performance is improved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an airbag bag body of a head protection side airbag device according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is a schematic configuration diagram showing a state where an airbag bag body is inflated in the head protection side airbag device according to the first embodiment of the present invention.

FIG. 4 is a schematic configuration diagram showing a disposition portion of the head protection side airbag device according to the first embodiment of the present invention when viewed from the side.

FIG. 5 is a graph showing the relationship between the airbag bag deployment time and the impact load acting on the joint portion of the base fabric in the head protection side airbag device according to the first embodiment of the present invention.

FIG. 6 is a schematic side view showing an airbag bag body of a head protection side airbag device according to a modified example of the first embodiment of the present invention.

FIG. 7 is an enlarged side view showing a partial cross section of a shock absorbing portion of a head protection side airbag device according to a modification of the first embodiment of the present invention.

FIG. 8 is a schematic configuration diagram showing a disposition portion of a head protection side airbag device according to a second embodiment of the present invention when viewed from the side.

9 (A) to 9 (C) are operation explanatory views showing respective deployed states of the airbag bag in a cross section taken along line 9-9 of FIG.

FIG. 10 is a graph showing the relationship between the airbag bag deployment time and the impact load acting on the joint portion of the base cloth in the head protection side airbag device according to the second embodiment of the present invention.

FIG. 11 is a schematic side view showing an airbag bag body of a head protection side airbag device according to a third embodiment of the present invention.

FIG. 12 is an enlarged cross-sectional view taken along line 12-12 of FIG. 11 showing an initial deployment state of the airbag bag.

FIG. 13 is a graph showing the relationship between the airbag bag deployment time and the impact load acting on the joint portion of the base fabric in the head protection side airbag device according to the third embodiment of the present invention.

FIG. 14 is a schematic side view showing a head protection side airbag device according to a conventional embodiment.

[Explanation of symbols]

10 Head Protective Side Airbag Device 14 Inflator 16 Airbag Body 17 Base Fabric 18 Center Pillar 20 Front Pillar 22 Instrument Panel 24 Non-Expanding Part 28 Roof Side Rail 38 Impact Absorbing Part 42 Base Fabric Stitching Part (Base Fabric 44 ) Breaking thread 46 Folding section 47 Mounting hole 50 Air bag 50A Passage section 50B Cylindrical inflating section 52 Base cloth 54 Base cloth joining section 56 Breaking thread (stress relaxation means) 60 Auxiliary cloth 61 Breaking thread (breaking) Coupling means) 62 Auxiliary gas supply passage 63 Auxiliary gas supply passage 64 Gas supply passage 65 Gas supply passage

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Yamada 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Toshinori Tanase, Kasuga Town, Nishikasugai District, Aichi Nagachi 1, Ochiai, Toyoda Gosei Co., Ltd. In-house (72) Inventor Hajime Terazawa Hajime Ochiai, Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Toyoda Gosei Co., Ltd. (56) References JP-A-10-166991 (JP, A) JP-A-6-344841 (JP, A) JP-A-7-164997 (JP, A) JP-A-7-125584 (JP, A) Actual Kaihei 6-18110 (JP, U) US Patent 5605346 (US, A) West German Utility Model 29616904 (DE, B) West German Patent Application Publication 4307175 (DE, A1) ( 58) Fields surveyed (Int.Cl. ⁷ , DB name) B60R 21/22 B60R 21/20

Claims (3)

(57) [Claims] 1. A plurality of substantially parallel cylindrical inflating portions, in which a base cloth is joined in a bag shape, front and rear end portions thereof are fixed to the front and rear of a vehicle side portion, and which cross a tension line connecting the front and rear fixing points. A curtain-shaped airbag bag having is stored while straddling a pillar and a roof side rail, and at the time of a side collision, an inflator arranged below the belt line of the pillar is actuated to operate the occupant's head and the side of the vehicle. A head protection side airbag device that inflates and deploys between, and absorbs an impact at the time of deploying the airbag bag body at a portion of the airbag bag body close to the inflator, along the pillar mounting portion. A shock absorbing portion is provided , and the shock absorbing portion is provided .
However, on the outside of the joint portion of the base cloth, the airbag bag body
Folds sewn by a breaking thread that breaks due to the deployment of
Head protection side air bag device which is a phloem. 2. The folded portion is in front of the airbag bag body.
The end portion on the inflator side and the attachment portion to the upper end of the pillar
Be sure that it is set closer to the inflator than near the center of
The head protection side airbag device according to claim 1, wherein: 3. The base cloth is joined in a bag shape, and the front and rear ends are respectively
It is fixed to the front and rear of the vehicle side, and the front and rear fixing points are
A plurality of substantially parallel cylindrical bulges that cross the tie line.
The curtain-shaped airbag bag with the stretched part
If the vehicle is stowed over the roof side rail and stored,
The inflator installed below the belt line
The head restraint that expands and deploys between the occupant's head and the side of the vehicle.
A protective side airbag device, which is a portion of the airbag bag adjacent to the inflator
An auxiliary bag disposed at a position, the auxiliary bag being adjacent to the connecting portion of the base cloth, the airbag bag.
Auxiliary gas supply passage is provided by the connecting means that breaks when the body is deployed.
Is formed, and the cross-sectional circumference of the auxiliary gas supply passage is
From the cross-sectional circumference of the gas supply passage formed by the base cloth on the outer periphery
Head protection side airbag device characterized by being set small .