JP2000062560A - Air bag body for air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform rapid vertical or lateral development of an air bag body to regulate a jump-out amount to the passenger side during developing expansion of an air bag body and protect a passenger, to improve passenger protection performance, and to simplify constitution and reduce weight. SOLUTION: This air bag comprises a main base cloth 13 on the passenger side and a main base cloth 15 on the mounting side. The outer peripheral edges 13a and 15a of the main cloth 13 on the passenger and the main base cloth 15 on the mounting side are sewn together to form a sewn part 19. An extension part 21 is formed in a protruding state at the outer peripheral edge 13a or 15a, positioned opposite to each other in a folding state, of the base cloth 13 on the passenger side or the main base cloth 15 on the mounting side or the main base cloth 15 on the mounting side. The extension parts 21 are intercoupled through sewing and a slit is formed in the extension part 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag body of an air bag device for protecting an occupant in the event of a vehicle collision, and more specifically, an air bag formed by sewing a plurality of main base cloths. The present invention relates to an airbag body of a bag device.

[0002]

2. Description of the Related Art Conventionally, an airbag device has been known as a vehicle occupant protection device. As this air bag device, in addition to a device mounted on an instrument panel or a steering wheel, a device mounted on a door, a seat back or the like is known. When the airbag device senses a shock, the gas generator is actuated, the gas momentarily flows into the airbag body, and the airbag body is instantly inflated to the occupant side.

The airbag main body is folded and stored in a normal state, and as a conventionally known technique for folding the airbag main body, there is JP-A-9-263204. Japanese Patent Laid-Open No. 9-263204 discloses a rectifying body having upper and lower gas flow outlet openings when the airbag body is inflated, and the upper and lower sides of the airbag body are folded in a bellows manner to form left and right side portions. A configuration in which a roll is folded is shown.

[0004]

However, the conventionally known airbag body has the drawbacks that the structure is complicated, the weight is increased, and the cost is increased, and the folding work of the airbag body is complicated. It was a thing.

An object of the present invention is to restrict the amount of protrusion to the occupant side when the airbag body is inflated and inflated, and to protect the occupant, the airbag body is rapidly expanded in the up-down direction or the left-right direction, and You can improve the protection performance,
The structure is simple and the weight can be reduced, the sewing work can be performed easily and quickly, the desired bulging shape of the airbag body can be obtained, and the airbag of the airbag device excellent in safety is obtained. The bag body is provided.

[0006]

The present invention has been made in view of the above-mentioned problems, and the airbag main body of the airbag device according to claim 1 of the present invention has a plurality of main base cloths sewn on it. In the airbag body of the airbag device formed as described above, the portions of the plurality of main base fabrics that face each other in a folded state are connected by connecting pieces.

An airbag body of an airbag device according to a second aspect of the present invention comprises an occupant-side main base cloth and a mounting-side main base cloth, and the occupant-side main base cloth and the mounting-side main base cloth are provided. In an airbag body of an airbag device in which outer peripheral edges are sewn together to form a sewn portion, the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth that are opposed to each other in a folded state are connected to each other. It is characterized by having done.

An airbag body of an airbag device according to a third aspect of the present invention includes an occupant-side main base cloth and a mounting-side main base cloth, and the occupant-side main base cloth and the mounting-side main base cloth are provided. In an airbag body of an airbag device in which outer peripheral edges are sewn together to form a sewn portion, the outer peripheral edges of the passenger-side main base cloth or the attachment-side main base cloth are extended to opposite outer peripheral edges in a folded state. The protrusions are formed and the extended portions are connected to each other.

An airbag main body of an airbag device according to a fourth aspect of the present invention comprises an occupant-side main base cloth and a mounting-side main base cloth, and the occupant-side main base cloth and the mounting-side main base cloth are provided. In an airbag body of an airbag device in which outer peripheral edges are sewn together to form a sewn portion, the outer peripheral edges of the passenger-side main base cloth or the attachment-side main base cloth are extended to opposite outer peripheral edges in a folded state. The protrusions are formed, the extending portions are connected to each other by sewing, and a slit is formed in the extending portion.

An airbag body of an airbag device according to a fifth aspect of the present invention comprises an occupant-side main base cloth and a mounting-side main base cloth, and the occupant-side main base cloth and the mounting-side main base cloth are provided. In an airbag body of an airbag device in which outer peripheral edges are sewn together to form a sewn portion, the outer peripheral edges of the passenger-side main base cloth or the attachment-side main base cloth that are opposed to each other in a folded state are connected to each other. It is characterized by being connected by a piece.

An airbag body of an airbag device according to a sixth aspect of the present invention comprises an occupant-side main base cloth and a mounting-side main base cloth, and the occupant-side main base cloth and the mounting-side main base cloth are provided. In an airbag body of an airbag device in which outer peripheral edges are sewn together to form a sewn portion, the outer peripheral edges of the passenger-side main base cloth or the attachment-side main base cloth are extended to opposite outer peripheral edges in a folded state. The protrusions are formed, the weaving direction of the original fabric of the main base fabric of the extending portion is formed in the bias direction, and the extending portions are connected to each other.

According to the airbag main body of the airbag device of the first aspect of the present invention, in the airbag main body of the airbag device formed by sewing a plurality of main base fabrics, the plurality of main substrates are provided. Since the opposing parts of the cloth in the folded state are connected by the connecting piece, the amount of popping out during the deployment process of the airbag body can be reduced, and the breaking of the connecting piece causes the final volume of the airbag body to expand. The number of passengers can be increased in the state, the occupant protection performance can be improved, the structure can be simplified, and the weight can be reduced.

According to the airbag body of the airbag device of the second aspect of the present invention, the outer peripheral edges of the passenger-side main base cloth or the attachment-side main base cloth are connected to each other in a folded state. The amount of protrusion of the airbag main body during the expansion process can be reduced, and the capacity of the airbag main body increases in the final expanded state by breaking the joint portion between the outer peripheral edges, improving the occupant protection performance. Therefore, the structure is simple and the weight can be reduced.

According to the airbag body of the airbag device of the third aspect of the present invention, the extending portions are provided at the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth that are opposed to each other in a folded state. Since the protrusions are formed and the extension portions are connected to each other,
It is possible to reduce the amount of popping out during the deployment process of the airbag main body, and the extension of the outer peripheral edge is broken, so that the capacity of the airbag main body increases in the final expanded state, and the passenger protection performance is improved. The structure is simple and the weight can be reduced.

According to the airbag body of the airbag device of the fourth aspect of the present invention, the extended portion is provided at the outer peripheral edge of the outer peripheral edge of the passenger side main base cloth or the attachment side main base cloth in the folded state. Since the protruding portions are formed, the extending portions are connected to each other by sewing, and the slits are formed in the extending portions, the protrusion amount in the process of deploying the airbag body can be reduced, and the extending portion of the outer peripheral edge can be reduced. By breaking the extended portion by the slit formed in the, the capacity of the airbag body is increased in the final expanded state, the occupant protection performance can be improved, and the configuration can be simplified and the weight can be reduced. .

According to the airbag body of the fifth aspect of the present invention, the outer peripheral edges of the outer peripheral edge of the passenger-side main base cloth or the mounting-side main base cloth that are opposed to each other in a folded state are connected by the connecting piece. Since they are connected, it is possible to reduce the amount of protrusion in the process of deploying the airbag body, and by breaking the connecting piece that connects the outer peripheral edges to each other, the capacity of the airbag body increases in the final expanded state, and The protection performance can be improved, the structure is simple, and the weight can be reduced.

According to the airbag body of the airbag device of the sixth aspect of the present invention, the extended portion is provided at the outer peripheral edge of the passenger side main base cloth or the attachment side main base cloth that is opposed to the outer peripheral edge in the folded state. Since the protrusions are formed, the weaving direction of the original fabric of the main base fabric of the extending portion is formed in the bias direction, and the extending portions are connected to each other, it is possible to reduce the pop-out amount during the deployment process of the airbag body. The main fabric of the extension part has strength because the weave direction of the original fabric of the main fabric of the extension part is formed in the bias direction when the extension part of the outer peripheral edge is broken. The main base fabric does not break, the connecting part of the extended part breaks, the capacity of the airbag body increases in the final bulging state, occupant protection performance can be improved, the structure is simple and the weight is light Can be converted.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An airbag body of an airbag device according to the present invention will be described below in detail with reference to the drawings. Figure 1
1 (a) and 1 (b) to 10 (a) and 10 (b) show embodiments of an airbag body of an airbag device according to the present invention, respectively. And FIG.
As shown in (a) and (b) respectively, this airbag body 1
1 includes an occupant-side main base cloth 13 and a mounting-side main base cloth 15.

The passenger side main base cloth 13 is formed in a substantially circular shape, and the outer peripheral edge of the mounting side main base cloth 15 is formed to be substantially the same as the outer peripheral edge of the passenger side main base cloth 13. A gas inlet 17 is formed inside the. still,
In FIG. 1B, reference numeral 18 is a gas generator. Further, the gas inlet 17 is not limited to that shown in the drawing, and may be omitted.

The outer peripheral edges 13a, 15a of the occupant-side main base cloth 13 and the attachment-side main base cloth 15 are sewn in an annular shape, and an annular sewn portion 19 is formed by double stitching.
A seam allowance 19a is formed on the outer side of the annular sewing portion 19 as shown in an enlarged manner in FIGS. Incidentally, FIG.
As shown in FIGS. 2A and 2A, an exhaust hole 25 is formed in the mounting-side main base cloth 15.

As shown enlarged in FIG. 3, the outer peripheral edge 13 of the passenger side main base cloth 13 or the mounting side main base cloth 15 is shown.
The outer peripheral edge 13a or the outer peripheral edge 15a which face each other in the folded state of a and 15a are connected to each other. In the present embodiment, the extending portion 21 is formed to project on the outer peripheral edge 15a of the attachment-side main base cloth 15, and The installation portions 21 are connected by sewing. The sewn portion 23 between the extended portions 21 is formed by double stitching.

As shown in FIG. 1B, the extending portion 21 formed on the outer peripheral edge 15a of the mounting-side main base cloth 15 projects toward the occupant-side main base cloth 13 opposite to the gas generator 18. Although it is preferable to reduce the influence of the heat of the gas generator 18, the gas generator 18 may be protruded to the gas generator 18 side. The sewn portions 23 between the extending portions 21 are the outer peripheral edges 13a, 1 of the passenger-side main base cloth 13 and the attachment-side main base cloth 15.
5a can be obtained by sewing the 5a to each other in an annular shape, and then reversing the attachment-side main base fabric 15.

2 (a) and 2 (b) show different embodiments of the airbag main body of the airbag device according to the present invention. The airbag main body 11 is a main fabric 13 for the passenger side. And the outer peripheral edge 13a of the mounting side main base cloth 15,
After sewn 15a to each other in an annular shape, the passenger side main base fabric 1
3 or the extended side portions 21 of the outer peripheral edges 13a and 15a facing each other in the folded state of the mounting side main base cloth 15 are connected by sewing, and the mounting side main base cloth 15 is not inverted.

In this embodiment, the sewn portion 23 between the extended portions 21 is the annular sewn portion 19 between the outer peripheral edges 13a and 15a of the passenger side main base cloth 13 and the attachment side main base cloth 15.
It may have the same strength as, or may be sewn weaker than the annular sewing portion 19. For example, a sewing thread thinner than the annular sewing portion 19 may be used, or the sewing pitch may be widened.

As shown in FIG. 3, the weaving direction of the original fabric of the extension portion 21 of the occupant side main base cloth 13 of the extension portion 21 or the attachment side main base cloth 15 is formed in the bias direction 27, respectively. The extension portions 21 are connected to each other.
Since the strength of the extended portion 21 is greater than the fracture of the extended portion 21,
It is formed so as to break the sewn portion 23, which is a connecting portion between them.

FIG. 4 shows a further different embodiment of the airbag main body of the airbag device according to the present invention. The parts corresponding to those of the above-mentioned embodiment are designated by the same reference numerals and further description will be given. Although the detailed description is omitted, the weaving direction of the original fabric of the extending portion 21 of the occupant side main base cloth 13 or the attachment side main base cloth 15 of the extending portion 21 is formed in the forward direction 28, and this extending direction is formed. The slit 31 is formed in the installation portion 21.

Since the extension portion 21 has a low strength and the slits 31 are formed, the slits 31 of the extension portion 21 can be formed without breaking the sewn portion 23 which is a connecting portion between the extension portions 21. The extended portion 21 is formed so as to be broken.

As shown in FIG. 5 (a), the extended portion 2
One slit 31 may be formed obliquely, or as shown in FIG. 5 (b), a substantially V-shaped notch 33 is formed on the side portion of the extended portion 21, and this substantially V-shaped notch 33 is formed. The slit 31 may be formed in the width direction from the notch 33. By using the configuration of the cutout portion 33 and the slit 31, the breaking force of the extension portion 21 can be reduced.

FIG. 6 shows a further different embodiment of the airbag main body of the airbag device according to the present invention. The parts corresponding to those of the above-mentioned embodiment are designated by the same reference numerals and further description will be given. Although detailed description is omitted, the connection is made by using a separately formed connection piece 41 instead of the extension portion 21. This connecting piece 41 is used for the passenger side main base cloth 13 or the attachment side main base cloth 1 of the airbag body 11.
It is formed of a belt-shaped material such as cloth or non-woven fabric having a strength lower than 5.

That is, the end portion 4 of the connecting piece 41 on the outer peripheral edges 13a, 15a of the passenger side main base cloth 13 or the mounting side main base cloth 15 facing each other in the folded state.
1a and 41b are sewn by the sewn portion 43, respectively. The sewn portion 4 of the end portions 41a and 41b of the connecting piece 41
3, and instead of the sewn portion 23 of the extension portion 21, the connecting piece 41 and the extension portion 2 by heat welding of high frequency, ultrasonic waves, or the like.
1 may be connected, or may be joined using an adhesive or the like.

FIGS. 7A, 7B and 8A,
(B) shows respective embodiments of the folded state of the airbag body of the airbag device according to the present invention,
First, the state shown in FIG. 1A, that is, the passenger-side main base fabric 1
3 and the outer peripheral edges 13a, 15a of the mounting-side main base cloth 15 are sewn in an annular shape, and the outer peripheral edges 13a, 1 of the occupant-side main base cloth 13 or the mounting-side main base cloth 15 that face each other in a folded state are sewn together.
After connecting the extended portions 21 of 5a by sewing,
As shown in FIGS. 8 (a) and 8 (b), both side portions are folded along the longitudinal direction of the airbag body 11, and then, as shown in FIG.
As shown in (b), the airbag body 11 is folded in a bellows shape toward the central gas inflow port 17 side from the vertical position in the longitudinal direction.

Therefore, when the airbag body 11 is deployed and expanded, the airbag body 11 can be quickly deployed in the vertical direction,
When the airbag body 11 is expanded and inflated, the amount of protrusion to the occupant side can be regulated and the lower abdomen of the occupant can be protected.
The direction of the airbag body 11 is not limited to the vertical direction,
By rotating it by 0 ° and using it, the deployment in the left-right direction can be speeded up, and the occupant protection performance can be improved.

9 (a), (b), (c) and FIG.
(A) and (b) respectively show different embodiments of the airbag main body of the airbag device according to the present invention. In these embodiments, the present invention is applied to the airbag main body such as a passenger seat. First, FIG. 9 (a),
The embodiment shown in (b) and (c) is an airbag body 1
1 includes a plurality of main base fabrics 14a, 14b, 14c. The main fabrics 14a, 14b, 14c are not limited to a plurality of main fabrics, and a fabric fabric divided into more or less than this may be used.

The plurality of main base fabrics 14a, 14b, 1
4c has a plurality of connecting pieces 51, which face each other in the folded state.
They are connected at 52. One connecting piece 51 is shown in FIG.
As is clear from (c), both ends are the main base cloth 14a.
And sewn between the sewn portions 53, 53 of the main base cloth 14b,
The other connecting piece 52 is sewn between the sewn portions 55, 55 of the main base cloth 14a and the main base cloth 14c, respectively.

As shown in FIGS. 9 (b) and 9 (c), the main base cloths 14a, 14b, 14c of the airbag body 11 are connected by the connecting pieces 51, 52, and are further folded to be stored. As shown in FIG. 9A, the connecting pieces 51 and 52 are broken when the airbag body 11 is inflated.

In the embodiment shown in FIGS. 10 (a) and 10 (b), among the plurality of main base cloths 14a, 14b, 14c,
The main fabrics 14b and 14c on the side are the main fabrics 14a.
Side, and the connecting piece 51 on the outside of the airbag body 11,
In the state where 52 is exposed, one connecting piece 51 is sewn between the sewn portions 53 of the main base cloth 14a and the main base cloth 14b, and the other connecting piece 52 is connected to the main base cloth 14 respectively.
It is sewn between a and the sewn portions 55, 55 of the main base cloth 14c.

Also in such a structure, as shown in FIG. 9A, the connecting pieces 51, 5 are inflated when the airbag body 11 is inflated.
2 is broken, and the airbag body 11 is brought into a predetermined bulging state. It should be noted that the connecting pieces 51, 52 may be formed with slits to facilitate breakage.

[0038]

The above is the embodiment of the airbag main body of the airbag device according to the present invention. Claim 1 of the present invention
According to the airbag main body of the airbag device described in (1), in the airbag main body of the airbag device formed by sewing the plurality of main base fabrics, the plurality of main base fabrics facing each other in a folded state are provided. Since it is connected with the connecting piece, the pop-out amount in the process of deploying the airbag body can be reduced, and the breaking of the connecting piece increases the capacity of the airbag body in the final expanded state, thereby improving the occupant protection performance. It is possible to improve, the structure is simple, and the weight can be reduced.

According to the airbag body of the airbag device of the second aspect of the present invention, since the outer peripheral edges of the passenger side main base cloth or the mounting side main base cloth are folded, the opposing outer peripheral edges are connected to each other. The amount of protrusion of the airbag main body during the expansion process can be reduced, and the capacity of the airbag main body increases in the final expanded state by breaking the joint portion between the outer peripheral edges, improving the occupant protection performance. Therefore, the structure is simple and the weight can be reduced.

According to the airbag body of the airbag device of the third aspect of the present invention, the extending portion is provided at the outer peripheral edge of the passenger side main base cloth or the mounting side main base cloth that is opposed to the outer peripheral edge in the folded state. Since the protrusions are formed and the extension portions are connected to each other,
It is possible to reduce the amount of popping out during the deployment process of the airbag main body, and the extension of the outer peripheral edge is broken, so that the capacity of the airbag main body increases in the final expanded state, and the passenger protection performance is improved. The structure is simple and the weight can be reduced.

According to the airbag body of the airbag device of the fourth aspect of the present invention, the extended portion is provided at the outer peripheral edge of the outer peripheral edge of the passenger side main base cloth or the attachment side main base cloth in the folded state. Since the protruding portions are formed, the extending portions are connected to each other by sewing, and the slits are formed in the extending portions, the protrusion amount in the process of deploying the airbag body can be reduced, and the extending portion of the outer peripheral edge can be reduced. By breaking the extended portion by the slit formed in the, the capacity of the airbag body is increased in the final expanded state, the occupant protection performance can be improved, and the configuration can be simplified and the weight can be reduced. .

According to the airbag body of the fifth aspect of the present invention, the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth that are opposed to each other in a folded state are connected by the connecting piece. Since they are connected, it is possible to reduce the amount of protrusion in the process of deploying the airbag body, and by breaking the connecting piece that connects the outer peripheral edges to each other, the capacity of the airbag body increases in the final expanded state, and The protection performance can be improved, the structure is simple, and the weight can be reduced.

According to the airbag main body of the airbag apparatus of the sixth aspect of the present invention, the extended portion is provided at the outer peripheral edge of the passenger side main base cloth or the attachment side main base cloth which is opposed to the outer peripheral edge in the folded state. Since the protrusions are formed, the weaving direction of the original fabric of the main base fabric of the extending portion is formed in the bias direction, and the extending portions are connected to each other, it is possible to reduce the pop-out amount during the deployment process of the airbag body. The main fabric of the extension part has strength because the weave direction of the original fabric of the main fabric of the extension part is formed in the bias direction when the extension part of the outer peripheral edge is broken. The main base fabric does not break, the connecting part of the extended part breaks, the capacity of the airbag body increases in the final bulging state, occupant protection performance can be improved, the structure is simple and the weight is light Can be converted.

According to the present invention, when the airbag body is inflated and expanded, the amount of protrusion to the occupant side is regulated, and in order to protect the occupant, the airbag body is rapidly deployed in the up-down direction or the left-right direction. You can improve the protection performance,
The structure is simple and the weight can be reduced, the sewing work can be performed easily and quickly, the desired bulging shape of the airbag body can be obtained, and the airbag of the airbag device excellent in safety is obtained. The bag body can be obtained.

[Brief description of drawings]

1A and 1B respectively show an airbag main body of an airbag device according to the present invention, FIG. 1A is a front view of a mounting side main base fabric side, and FIG. 1B is a sectional view of the airbag device.

2A and 2B respectively show different embodiments of an airbag main body of an airbag device according to the present invention, in which FIG. 2A is a front view of a main fabric side on a mounting side, and FIG.

FIG. 3 is a partially enlarged perspective view showing an airbag body of an airbag device according to the present invention.

FIG. 4 is a partially enlarged perspective view showing another embodiment of the airbag body of the airbag device according to the present invention.

5A and 5B respectively show different embodiments of the slits of the extending portion shown in FIG. 4, and FIGS. 5A and 5B are front views of the extending portion.

FIG. 6 is a partially enlarged perspective view showing still another embodiment of the airbag body of the airbag device according to the present invention.

7A and 7B show the respective embodiments of the folded state of the airbag body of the airbag device according to the present invention.
Is a front view of the mounting side main base fabric side, and (b) is a sectional view.

8A and 8B respectively show embodiments of a folded state of an airbag body of an airbag device according to the present invention, in which FIG.
Is a front view of the mounting side main base fabric side, and (b) is a cross-sectional view taken along line YY.

9A and 9B show still another embodiment of the airbag body of the airbag device according to the present invention, wherein FIG. 9A is a perspective view in a bulged state, FIG. 9B is a perspective view before folding, and FIG. Is a cross-sectional view before folding.

FIG. 10 shows still another embodiment of the airbag body of the airbag device according to the present invention, (a) is a perspective view before folding, and (b) is a sectional view before folding.

[Explanation of symbols]

11 Airbag body 13 Main fabric for passengers 13a outer peripheral edge 14a Main base cloth 14b Main base cloth 14c Main base cloth 15 Main fabric on the mounting side 15a outer peripheral edge 17 Gas inlet 18 gas generator 19 Ring sewing part 19a Seam allowance 21 Extension 23 Sewing area 27 Bias direction 28 Forward direction 31 slits 33 Notch 41 connecting piece 41a end 41b end 43 Sewing part 51 connecting piece 52 Connecting piece 53 Sewing area 55 Sewing area

Continued front page    (72) Inventor Toshihiko Kumagai             2-1513 Shin-Yokohama, Kohoku Ward, Yokohama City, Kanagawa Prefecture             No. within Autoliv Japan Co., Ltd. F term (reference) 3D054 AA13 AA14 AA17 AA22 CC04                       CC05 CC11 CC42 FF14 FF16                       FF17

Claims (6)

[Claims] 1. An airbag body of an airbag device formed by sewing a plurality of main base fabrics, wherein the plurality of main base fabrics, which are opposed to each other in a folded state, are connected by connecting pieces. The airbag body of the airbag device. 2. An air comprising a passenger side main base cloth and an attachment side main base cloth, wherein outer peripheral edges of the passenger side main base cloth and the attachment side main base cloth are sewn together to form a sewn portion. In the airbag body of the bag device, the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth that are opposed to each other in a folded state are connected to each other. 3. An air comprising a passenger side main base cloth and a mounting side main base cloth, wherein outer peripheral edges of the passenger side main base cloth and the mounting side main base cloth are sewn together to form a sewn portion. In the airbag body of the bag device, extending portions are formed so as to project at outer peripheral edges facing each other in a folded state of the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth,
An airbag body of an airbag device, wherein the extending portions are connected to each other. 4. An air comprising a passenger side main base cloth and a mounting side main base cloth, wherein outer peripheral edges of the passenger side main base cloth and the mounting side main base cloth are sewn together to form a sewn portion. In the airbag body of the bag device, extending portions are formed so as to project at outer peripheral edges facing each other in a folded state of the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth,
An airbag body of an airbag device, wherein the extending portions are connected by sewing and a slit is formed in the extending portion. 5. An air comprising a passenger side main base cloth and a mounting side main base cloth, wherein outer peripheral edges of the passenger side main base cloth and the mounting side main base cloth are sewn together to form a sewn portion. In the airbag body of the bag device, the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth that are opposed to each other in a folded state are connected by connecting pieces. . 6. An air comprising a passenger side main base cloth and a mounting side main base cloth, wherein outer peripheral edges of the passenger side main base cloth and the mounting side main base cloth are sewn together to form a sewn portion. In the airbag body of the bag device, extending portions are formed so as to project at outer peripheral edges facing each other in a folded state of the outer peripheral edges of the passenger side main base cloth or the attachment side main base cloth,
An airbag main body of an airbag device, wherein a weaving direction of a raw fabric of a main base fabric of the extending portion is formed in a bias direction and the extending portions are connected to each other.