JP2003231452A - Head part protecting airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain an expansion part for a front seat and an expansion part for a rear seat of an airbag body from moving in the longitudinal direction of a vehicle from a predetermined position in expanding and spreading it, in a head part protecting airbag device. <P>SOLUTION: In this head part protecting airbag device, the airbag body 11 longitudinally has the expansion part 11c for the front seat and the expansion part 11d for the rear seat by interposing an intermediate non-expansion part 11e, and has a communication passage 11b for communicating the upper ends of both the expansion parts 11b and 11c with each other above the non- expansion part 11e. An extensible part S1 (composed by forming elongate holes 11e1, 11e2 and 11e3 extending in the vehicular vertical direction) extensible in the vehicular longitudinal direction in response to the expansion and spread of the expansion part 11c and the expansion part 11d is formed in the non- expansion part 11e of the airbag body 11. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head protection airbag device mounted on a vehicle, and more particularly to an airbag main body which is accommodated along a roof side rail in a folded state and has an intermediate non-inflatable portion. A front seat inflating portion and a rear seat inflating portion are sandwiched in between, and a communication passage communicating the upper end portions of these both inflating portions is provided above the intermediate non-inflatable portion. A head protection airbag device that protects the occupant's head by inflating and expanding downward in a curtain shape by gas supplied to the front seat inflating portion and the rear seat inflating portion through a passage. Regarding

[0002]

2. Description of the Related Art A head protection airbag device of this type is disclosed, for example, in Japanese Patent Laid-Open No. 2000-6749.
In the head protection airbag device of the publication, the airbag main body that is stored along the roof side rail in the folded state has a front seat inflating portion and a rear seat inflating portion, and An airbag bag body having a communication passage for communicating the upper end portion with a substantially rectangular notch in an intermediate portion between the front seat inflation part and the rear seat inflation part, and the notch of the airbag bag body. And a thin cloth which is correspondingly fixed to form an intermediate non-expandable portion.

[0003]

In the above-described conventional head protection airbag device, the inflatable portion for the front seat and the inflatable portion for the rear seat of the airbag body are inflated at the time of expansion and deployment, and thus the inflatable portion for the front seat is provided. The length of the rear seat inflating portion in the vehicle front-rear direction is reduced. Therefore, the front seat inflatable section and the rear seat inflatable section are attracted to each other via the intermediate non-inflatable section, and at least one of the front seat inflatable section and the rear seat inflatable section moves in the front-rear direction from the intended position. There is a risk that the intended protected area may not be secured. In addition, it is possible to secure the desired protection area by enlarging the inflatable part for the front seat and the inflatable part for the rear seat of the airbag body, but in this case, the expected inflatable deployment performance is secured. In order to do this, the inflator also needs to be upsized,
Various problems associated with this will also occur.

[0004]

SUMMARY OF THE INVENTION To solve the above problems, the present invention provides a head protection airbag apparatus of the type described above, wherein the airbag main body is provided with the inflating portion for the front seat and the rear seat. The invention is characterized in that an expandable portion that can be expanded in the vehicle front-rear direction along with the expansion and expansion of the expansion portion is provided (the invention according to claim 1). In this case, the expandable portion is provided in the intermediate non-inflatable portion of the airbag body (the invention according to claim 2), or in front of the front seat inflating portion of the airbag body. It is also possible to provide it in the non-inflatable portion formed in the above or in the non-inflatable portion formed behind the rear seat inflating portion (the invention according to claim 3).

The extendable portion may be formed by providing a plurality of elongated holes or slits extending in the vehicle vertical direction in the base fabric of the airbag body (the invention according to claim 4). Yes, in this case, at least one of the elongated holes or slits extends to the lower end of the airbag body and is opened (claim 5).
Invention related to) is desirable.

Further, the expandable portion provided in the intermediate non-inflatable portion of the airbag body has a slack in the vehicle front-rear direction when the airbag body is accommodated along the roof side rail. It is also possible that the intermediate non-inflatable portion has a base cloth (the invention according to claim 6), and in this case, the slack margin of the base cloth goes from above the airbag body to below. It is desirable that it becomes larger as it goes (the invention according to claim 7).

Further, the middle non-inflatable portion of the airbag body has a trapezoidal shape having a lower bottom longer than the upper bottom, and the front seat inflating portion has a front rising shape for the rear seats. The inflatable portion is formed in a rearward rising shape, and in a state in which both front and rear end portions are bent downward and housed along the roof side rail in a state where the airbag body is folded, the intermediate non-inflatable portion is formed. It is also possible that the base cloth becomes an expandable portion that has a slack in the vehicle front-rear direction and can be expanded, and the slack margin increases from the upper side of the airbag body to the lower side (the invention according to claim 8). is there.

[0008]

In the head-protecting airbag device according to the present invention (the invention according to claim 1), the front and rear of the vehicle are inflated by the inflation and deployment of the inflatable portion for the front seat and the inflatable portion for the rear seat in the airbag body. An extensible portion that can extend in any direction is provided. Therefore, even if the front seat inflatable portion and the rear seat inflatable portion inflate at the time of inflation and deployment, and the front-rear inflatable portion and the rear seat inflatable portion decrease in length in the vehicle front-rear direction, respectively. The expansion of the expandable portion of the bag body suppresses the movement of the front seat inflatable portion and the rear seat inflatable portion in the vehicle front-rear direction from the intended position. Therefore, it is possible to secure a desired protection area without increasing the size of the front seat inflating portion and the rear seat inflating portion.

Further, in the head protecting airbag apparatus according to the present invention (the invention according to claim 2), the expandable portion is provided in the middle non-inflatable portion of the airbag body, that is, in a generally wide area. Therefore, it is possible to sufficiently obtain the extension action of the extendable portion, and it is possible to sufficiently suppress the movement of the front seat inflating portion and the rear seat inflating portion in the vehicle longitudinal direction from the intended positions. is there. Further, since the expandable part is provided in the intermediate non-expandable part between the front seat inflating part and the rear seat inflating part, the expanding action of the expandable part is applied to the front seat inflating part and the rear seat inflating part. It is possible to give it in a well-balanced manner.

Further, in the head protecting airbag apparatus according to the present invention (the invention according to claim 3), the expandable portion is a non-inflatable portion or a rear seat formed in front of the front seat inflating portion in the airbag body. Since it is provided in the non-inflatable part formed behind the inflatable part, the expandable part can obtain the extension action while maintaining the relative positional relationship between the front inflatable part and the rear inflatable part. Is possible.

Further, in the head protection airbag apparatus according to the present invention (the invention according to claim 4), the extendable portion is provided with a plurality of elongated holes or slits extending in the vehicle vertical direction in the base fabric of the airbag body. Since it is configured as described above, it is possible to effectively utilize the base fabric of the airbag body to easily produce the expandable portion.

Further, in the head protection airbag apparatus according to the present invention (the invention according to claim 5), since at least one of the elongated hole or the slit extends to the lower end of the airbag body and is opened, the airbag is protected. It is possible to sufficiently obtain the extension action by the extendable portion at the lower end of the airbag body that is most likely to move in the front-rear direction when the bag body is inflated and deployed.

Further, in the head protecting airbag apparatus according to the present invention (the invention according to claim 6), the airbag main body is stored along the roof side rail (the airbag main body is in a non-inflated and expanded state). Since the expandable portion is formed of the base cloth of the intermediate non-inflatable portion having slack in the vehicle front-rear direction, the expandable portion can be easily produced by changing the shape of the base fabric of the intermediate non-inflatable portion of the airbag body. It is possible.

Further, in the head protecting airbag device according to the present invention (the invention according to claim 7), the slack margin of the base cloth increases from the upper side to the lower side of the airbag main body, and therefore the above-mentioned claim. In addition to the effects of the invention according to 6, it is possible to sufficiently obtain the extension action at the lower end of the airbag body that is most easily moved in the front-rear direction when the airbag body is inflated and deployed.

Further, in the head protection airbag apparatus according to the present invention (the invention according to claim 8), the intermediate non-inflatable portion is formed in a trapezoidal shape in which the lower bottom is longer than the upper bottom, and the front seat is provided. The inflating portion for the front seat is formed in a front rising shape, the inflating portion for the rear seat is formed in a rear rising shape, and both front and rear end portions are bent downward in a state in which the airbag body is folded. In the state of being accommodated along the rail, the base fabric of the intermediate non-inflatable portion becomes a stretchable portion that has a slack in the vehicle front-rear direction and can extend, and the slack margin goes from above the airbag body to below. Grows larger as you go. For this reason, even if the airbag body is flatly woven, or if two plain weave base fabrics are sewn or adhered (heat welded) to make the airbag body, It is possible to make the extendable part.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment in which the present invention is applied to a head protection airbag device for a vehicle of a passenger car type, and the head protection airbag device of this embodiment is provided in a side portion of a vehicle compartment. An airbag 10 for inflating and expanding in a curtain shape to protect the heads of front passengers and the heads of rear passengers (both not shown), and an inflator 22 for supplying gas to the airbag 10 through a diffuser 21 are provided. There is. The airbag 10 includes an airbag main body 11 having an inflatable portion and a non-inflatable portion, and a tension cross 12 assembled to the front end portion of the airbag main body 11 and having no inflatable portion.
It is composed by.

The airbag body 11 is formed of a hollow weave so that the weave direction is in the front-rear direction and the upper-lower direction. The surface of the air-bag body 11 is coated to maintain airtightness, and is provided in the middle portion in the longitudinal direction (front-rear direction). In addition to having a gas introduction portion 11a, a gas communication passage 11b extending below the gas introduction portion 11a in the front-rear direction, and an inflating portion 11c for front seats and an inflating portion 11d for rear seats whose upper ends communicate with each other through the gas communication passage 11b, It has an intermediate non-expandable portion 11e, a front end non-expandable portion 11f, and a plurality of mounting piece portions 11g. Each mounting piece 11g
The roof side rail 31 is provided with a mounting hole 11g1.

The inflatable portion 11c for the front seat includes the front seat (B pillar 3
3 is provided to protect the head of an occupant seated in a seat (corresponding to 3) and has a plurality of vertically extending expansion chambers (see cells shown in FIGS. 1 and 2). There is. On the other hand, the rear seat inflating section 11d protects the head of an occupant seated in the rear seat, and has a plurality of vertically extending expansion chambers (see cells shown in FIGS. 1 and 2). There is.

The intermediate non-inflatable portion 11e is the inflatable portion 11 for the front seat.
It is formed between c and the rear seat inflating portion 11d and is sandwiched in the front-rear direction, and the gas communication passage 11b passes above it. Further, the intermediate non-inflatable portion 11e is provided with three elongated holes 11e1, 11e2, 11e3 extending in the vehicle vertical direction, and the central elongated hole 11e2 extends to the lower end of the airbag body 11 and is opened. There is. As a result, the elongated hole forming portion of the intermediate non-inflatable portion 11e is an extendable portion S1 that can be extended in the vehicle front-rear direction as the front seat inflating portion 11c and the rear seat inflating portion 11d are inflated and deployed.

The tension cloth 12 is formed in a triangular shape (the shape can be appropriately changed) by a non-coated woven cloth (base cloth having no inflatable portion) which is thinner and cheaper than the constituent cloth of the airbag body 11. The end portion 12a is sewn to the front end non-inflatable portion 11f of the airbag body 11,
The A pillar 32 is attached to the mounting hole 12b1 provided in the front end portion 12b.
(See FIG. 1).

In the airbag 10 described above, the airbag body 11 is folded into a bellows shape in the vertical direction as shown in FIGS. 3 and 4, and the side of the roof side rail 31 and the roof head lining 41 side. The space is formed along the roof side rail 31 in a space formed between the roof side rail 31 and the peripheral edge portion. In addition, as shown in FIG. 3, the tension cloth 12 is folded in a bellows shape in a space formed between the A-pillar 32 and the A-pillar garnish 42 that is attached to and covers the A-pillar 32. It is adapted to be stored along the pillar 32. In addition,
The airbag body 11 and the tension cloth 12 that are folded in a bellows shape are held by a sock 14 (see FIG. 4) that breaks due to the inflation and deployment of the airbag 10.

As shown in FIGS. 1 and 3, the diffuser 21 is formed in a substantially cylindrical shape having a closed end, and is formed in a substantially linear shape, and has a gas injection port 22a of the inflator 22.
The male screw portion 22b provided on the base end (rear end) is internally and coaxially connected and fixed to the female screw portion (nut portion) 21a provided on the base end (rear end). A pair of front and rear gas supply holes 21b1, 21b scattered along the
b2.

In the diffuser 21, the front end portion 21b is inserted into the gas introducing portion 11a of the airbag body 11 so that the pair of front and rear gas supply holes 21b1 and 21b2 are open downward. The bag body 11 is airtightly attached to the open end of the gas introduction portion 11a by using a tightening band 23.

The inflator 22 operates at the time of a side collision of the vehicle or at the time of rollover (this state is detected by a sensor (not shown)) to supply gas to the airbag body 11.
Brackets and bolts
(Both not shown) can be attached to the roof side rail 31. Also, the inflator 22
Is the airbag body 11 at the center of the vehicle in the front-rear direction.
Is arranged in the front-rear direction above the roof side rail 31 and is covered by the roof headlining 41.

In the air bag device of this embodiment constructed as described above, the sock 14 (see FIG. 4) in which the air bag body 11 and the tension cloth 12 are normally folded in multiple layers in the vertical direction and can be broken. As shown in FIG. 3, it is housed along the A pillar 32 and the roof side rail 31 in a compactly housed state, and is covered by the A pillar garnish 42 and the roof headlining 41.

In addition, when an inflator 22 operates at an acceleration detected by a corresponding sensor (not shown) at a set value or more during abnormal conditions such as a vehicle side collision or a rollover, the air that is folded and stored is stored. In the gas communication passage 11b of the airbag body 11 of the bag 10, the gas supply holes 21b1 of the inflator 22 to the diffuser 21 are provided.
Gas is supplied through 21b2, and this gas is distributed and supplied toward the front part and the rear part of the gas communication passage 11b. Therefore, as the front and rear inflating portions 11b and 11c of the airbag body 11 are inflated and deployed by the supplied gas, the entire airbag 10 is inflated at the side portion in the vehicle compartment as shown in FIG. It expands and develops like a curtain to protect the heads of front passengers and the heads of rear passengers.

By the way, in this embodiment, the inflatable portion 1 for the front seat is attached to the intermediate non-inflatable portion 11e of the airbag body 11.
1C and the rear seat inflating portion 11d are provided with an extendable portion S1 that can be extended in the vehicle front-rear direction along with the expansion and deployment. For this reason,
The front seat inflating portion 11c and the rear seat inflating portion 11d of the airbag body 11 swell during expansion and deployment, so that the lengths of the front seat inflating portion 11c and the rear seat inflating portion 11d in the vehicle front-rear direction and the vehicle up-down direction. Even if each of them contracts, the expandable portion S1 of the airbag body 11 expands as shown in FIG. 1, so that the movement of the rear seat inflating portion 11d from the intended position in the vehicle front direction is suppressed. .

Therefore, it is possible to secure a desired protected area without increasing the size of the rear seat inflating portion 11d. If the expandable portion S1 is not provided in the airbag body 11, the front seat inflating portion 11c and the rear seat inflating portion 11d of the airbag body 11 should inflate when inflated and deployed, as shown in FIG. By the inflatable portion 11c for the front seat
The lengths of the rear seat inflating portion 11d in the vehicle front-rear direction and the vehicle up-down direction are respectively shortened, and accordingly, particularly the rear seat inflating portion 11d of the airbag body 11 largely moves from the intended position to the vehicle front direction. , It may not be possible to secure the intended protected area.

Further, in this embodiment, since the expandable portion S1 is provided in the intermediate non-inflatable portion 11e of the airbag body 11, that is, generally in a wide area,
It is possible to sufficiently obtain the extension action of the extendable portion S1, and it is possible to sufficiently suppress the movement of the front seat inflating portion 11c and the rear seat inflating portion 11d in the vehicle longitudinal direction from the intended position. is there. Further, the expandable portion S1 is the front seat inflatable portion 1
Since it is provided in the intermediate non-inflatable portion 11e between the rear seat inflating portion 11d and the rear seat inflating portion 11d, the extending action of the extendable portion S1 can be applied to the front seat inflating portion 11c and the rear seat inflating portion 11d in a well-balanced manner. Is.

Further, in this embodiment, since the expandable portion S1 is formed by providing the base cloth of the airbag body 11 with a plurality of elongated holes 11e1, 11e2, 11e3 extending in the vehicle vertical direction, the airbag. Body 11
It is possible to effectively produce the stretchable portion S1 by effectively utilizing the base fabric. Further, since the elongated hole 11e2 extends to the lower end of the airbag body 11 and is opened, the extension by the expandable portion S1 at the lower end of the airbag body 11 that is most easily moved in the front-rear direction when the airbag body 11 is inflated and deployed. It is possible to obtain a sufficient effect.

In the above embodiment, the elongated holes 11e1, 11e2 are formed in the intermediate non-inflatable portion 11e of the airbag body 11.
Although the expandable portion S1 is configured by providing 11e3, the elongated holes 11e1 and 11e1 are formed as shown in FIG.
slits 11e11, 11e1 instead of e2, 11e3
It is also possible to configure and implement the expandable portion S2 by providing 2, 11e13. In addition, in the embodiment of FIG. 5, each slit 11e11, 11e12, 11e1.
A small hole is provided at the closed end portion of 3 to prevent the base cloth from breaking at the same portion.

Further, in the above embodiment, the elongated holes 11e1 and 11e are formed in the intermediate non-inflatable portion 11e of the airbag body 11.
Although the extensible portion S1 is configured by providing e2 and 11e3, as shown in FIG. 6, FIG. 7, or FIG. 8, the tension belt portion integrally formed in front of the airbag body 11 (the above-mentioned Tension cloth 12 of the embodiment
11h, long holes 11h1, 11h2,
By providing 11h3, the expandable portion S3 can be configured and implemented. In these embodiments, it is possible to obtain the extension action by the extendable portion S3 while maintaining the relative positional relationship between the front seat inflating portion 11c and the rear seat inflating portion 11d.

In the embodiment shown in FIG. 7,
An expandable portion S1 is provided on the intermediate non-inflatable portion 11e of the airbag body 11. Further, in the embodiment shown in FIG. 8, a long hole 11i1 (which extends to the lower end of the airbag body 11 and is opened) is formed in the tension belt portion 11i which is integrally formed on the rear side of the airbag body 11. By providing the expandable portion S4.

Further, in the above embodiment, the present invention is applied to the airbag main body 11 employed in the vehicle head protection airbag device of two rows of front and rear seats, but as shown in FIG. The present invention can be similarly applied to the airbag main body 111 employed in the vehicle head protection airbag device of the row seats (the seats in which the rear seats are two rows in the front and rear).

In the embodiment shown in FIG. 9, a long hole is formed in the front intermediate non-inflatable portion 111e (the non-inflatable portion between the front seat inflating portion 111c and the front rear seat inflating portion 111d1) of the airbag body 111. The expandable portion S11 is configured by providing the 111e1 and is formed in the intermediate non-inflatable portion 111j (the non-inflatable portion between the front rear seat inflating portion 111d1 and the rear rear seat inflating portion 111d2) of the airbag body 111. Long hole 1
The expandable portion S12 is configured by providing 11j1, 111j2, and 111j3. It should be noted that the other structure of the airbag body 111 is that the tension belt portion 1
The structure is substantially the same as that of the airbag main body 11 shown in FIG. 2 except that it has 11h, and therefore, like reference numerals in the 100s are used and the description thereof is omitted.

Further, in the above-described embodiment, the intermediate non-inflatable portion 11e of the airbag body 11 extends vertically.
Although the expandable portion S1 is configured by providing the individual elongated holes 11e1, 11e2, 11e3, as shown in FIG. 10, the intermediate non-inflatable portion 11e of the airbag body 11 is shown.
16 elongated holes 11e1 to 11e16 extending vertically
It is also possible to configure and implement the expandable portion S1 by providing one elongated hole 11e17 extending in the front-back direction.

In the above embodiment, the intermediate non-inflatable portion 11e of the airbag body 11 extends vertically.
Although the expandable portion S1 is configured by providing the individual elongated holes 11e1, 11e2, 11e3, as shown in FIG. 11, when the airbag main body 11 is woven, the intermediate non-inflatable portion 11e is removed. The lower bottom is formed in a trapezoidal shape whose length is longer than that of the upper bottom, and the front seat inflating portion 11c is formed in a front rising shape.
The rear seat inflating portion 11d is formed in a rearward rising shape, and both front and rear end portions are bent downward in a state where the airbag body 11 is folded, and as shown in FIG. 3, along the roof side rail 31. In the state in which the intermediate non-inflatable portion 11e is stored, the base fabric of the intermediate non-inflatable portion 11e becomes a stretchable portion S1 that is slack in the vehicle front-rear direction and can be stretched.
It is also possible to carry out by making it larger as it goes from the upper side of 1 to the lower side.

In the embodiment shown in FIG. 11, in the state where the airbag body 11 is accommodated along the roof side rails 31 (the airbag body 11 is in the non-inflated and expanded state), there is a slack in the vehicle longitudinal direction. Since the stretchable portion S1 is composed of the base fabric of the non-inflatable portion 11e, the airbag body 1
It is possible to easily produce the expandable portion S1 by changing the shape of the base fabric of the intermediate non-expandable portion 11e in No. 1. Further, since the looseness of the base fabric of the intermediate non-inflatable portion 11e increases from the upper side to the lower side of the airbag body 11, the lower end of the airbag body 11 that is most likely to move in the front-back direction when the airbag body 11 is inflated and deployed. It is possible to fully obtain the elongation effect in.

Further, in the above embodiment, the airbag body 11 is formed by being flatly woven and then cut into a predetermined shape. However, two plain weave base fabrics are sewn or bonded. It is also possible that the airbag body is manufactured through cutting (heat welding) into a predetermined shape (or cutting into a predetermined shape and then sewing or adhering).

Further, in the above embodiment, the present invention is applied to the head protection airbag device in which the gas introduction portion 11a formed in the airbag body 11 is provided in the middle portion of the airbag body 11, but the airbag is The present invention can be similarly implemented in a head protection airbag device in which the gas introduction portion formed in the main body is provided at the rear end portion or the front end portion of the airbag main body.

[Brief description of drawings]

FIG. 1 is a side view schematically showing an embodiment of a head protection airbag device according to the present invention when an airbag is inflated and deployed.

FIG. 2 is a side view of the airbag shown in FIG. 1 in a non-inflated deployment state.

FIG. 3 is a side view showing a state where the airbag shown in FIG. 1 is stored.

FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG.

FIG. 5 is a side view corresponding to FIG. 2 showing a first modified embodiment of the airbag body.

FIG. 6 is a side view corresponding to FIG. 2 showing a second modified embodiment of the airbag body.

FIG. 7 is a side view corresponding to FIG. 2 showing a third modified embodiment of the airbag body.

FIG. 8 is a side view corresponding to FIG. 2 showing a fourth modified embodiment of the airbag body.

FIG. 9 is a side view corresponding to FIG. 2, showing a fifth modified embodiment of the airbag body.

FIG. 10 is a side view corresponding to FIG. 2 showing a sixth modified embodiment of the airbag body.

FIG. 11 is a side view corresponding to FIG. 2 showing a seventh modified embodiment of the airbag body.

FIG. 12 is a side view corresponding to FIG. 1 of an embodiment in which the present invention is not implemented.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Airbag, 11 ... Airbag main body, 11a ... Gas introduction part, 11b ... Gas communication path, 11c ... Front seat expansion part, 11d ... Rear seat expansion part, 11e ... Intermediate non-expansion part, 1
1e1, 11e2, 11e3 ... elongated hole, 11f ... front end non-expandable portion, 11g ... mounting piece portion, 12 ... tension cross, 2
1 ... Diffuser, 22 ... Inflator, 31 ... Roof side rail, 32 ... A pillar, 33 ... B pillar, 41
... Roof head lining, 42 ... A pillar garnish, S1 ... Extensible part.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuyoshi Ohno             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. F-term (reference) 3D054 AA02 AA03 AA04 AA06 AA07                       AA16 AA20 BB30 CC03 CC08                       CC11 DD14 EE09 EE14 EE20

Claims (8)

[Claims] 1. An airbag main body which is stored along a roof side rail in a folded state has a front seat inflating portion and a rear seat inflating portion on both sides of an intermediate non-inflatable portion, and both of them are provided. A communication passage communicating the upper end portion of the expansion portion is provided above the intermediate non-expansion portion, and is lowered by gas supplied from the inflator to the front seat expansion portion and the rear seat expansion portion through the communication passage. In a head protection airbag device adapted to protect the occupant's head by inflating and deploying in a curtain shape toward, toward the airbag main body, the front seat inflating portion and the rear seat inflating portion are provided. A head protection airbag device, which is provided with an expandable portion that can be expanded in the vehicle front-rear direction when inflated and expanded. 2. The head protection airbag apparatus according to claim 1, wherein the expandable portion is provided in the intermediate non-inflated portion of the airbag body. apparatus. 3. The head protection airbag device according to claim 1, wherein the expandable portion is a non-inflatable portion formed in front of the front seat inflating portion of the airbag body or the rear seat inflating portion. A head protection airbag device, wherein the head protection airbag device is provided in a non-inflatable portion formed behind the portion. 4. The head protection airbag device according to claim 1, 2 or 3, wherein the extendable portion is provided with a plurality of elongated holes or slits extending in a vehicle vertical direction in a base cloth of the airbag body. A head protection airbag device, which is configured by the following. 5. The head protection airbag apparatus according to claim 4, wherein at least one of the elongated hole and the slit extends to a lower end of the airbag body and is opened. Protective airbag device. 6. The head protection airbag device according to claim 2, wherein the expandable portion provided in the intermediate non-inflatable portion of the airbag body has the airbag body attached to the roof side rail. A head protection airbag device comprising a base cloth of the intermediate non-inflatable portion having a slack in a vehicle front-rear direction in a state of being housed along the same. 7. The head protection airbag according to claim 6, wherein the slack margin of the base cloth increases from the upper side to the lower side of the airbag body. apparatus. 8. An airbag main body, which is accommodated along a roof side rail in a folded state, has a front seat inflating portion and a rear seat inflating portion with front and rear portions sandwiching an intermediate non-inflatable portion. A communication passage communicating the upper end portion of the expansion portion is provided above the intermediate non-expansion portion, and is lowered by gas supplied from the inflator to the front seat expansion portion and the rear seat expansion portion through the communication passage. A head protection airbag device configured to protect the occupant's head by inflating and expanding in a curtain shape toward the vehicle, wherein the intermediate non-inflatable portion is formed in a trapezoidal shape in which a lower bottom is longer than an upper bottom. The front seat inflatable portion is formed in a front rising shape, the rear seat inflating portion is formed in a rear rising shape, and both front and rear end portions are bent downward in a state in which the airbag body is folded. The roof When stored along the side rails, the base fabric of the intermediate non-inflatable portion is an extensible portion that is slack in the vehicle front-rear direction and can extend, and the slack margin is from above the airbag body to below. A head protection airbag device characterized by increasing in size as it goes.