JP2914423B2 - Airbag body of airbag device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag body of an airbag device for protecting an occupant in the event of a collision of a vehicle or the like.
More specifically, the present invention relates to an airbag body of an airbag device which is inflated when a gas generator is actuated, wherein the airbag body is formed in a bag shape by sewing a plurality of base fabrics by sewing. The present invention relates to an airbag body of an airbag device provided.

[0002]

2. Description of the Related Art Conventionally, an airbag device has been known as a protection device for a passenger such as a vehicle. This airbag device is disclosed in Japanese Utility Model Laid-Open No. 2-123445,
43747, Japanese Utility Model Laid-Open No. 5-71063, JP-A-5-16751, JP-A-6-1188,
JP-A-3-248945 and the like exist.

[0003] A suspension belt, strap or tether for shape control is attached to the airbag body of the conventional airbag device. For example, the suspension belt prevents the airbag body 3 from expanding in one direction toward the occupant's face when the gas generator is activated. A conventional suspension belt of an airbag body is sewn to a front fabric or a rear fabric via a belt catch or the like.

[0004]

When a suspension belt, strap, or tether for shape control is provided on an airbag body of a conventional airbag device, the suspension belt, strap, or tether is provided separately from the airbag body. And these are joined by sewing.Because a suspension belt, strap, or tether is located inside the airbag body, sewing work is complicated and workability is poor, and component costs increase. The economy was lacking.

An object of the present invention is to form a strap for regulating the shape of the airbag body integrally with the base fabric of the airbag body, to reliably regulate the shape of the airbag body, and to sew the airbag body and the strap. The purpose of the present invention is to provide an airbag body of an airbag device which can reduce costs, improve economic efficiency and is excellent in safety by simplifying the method.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an airbag body of an airbag device according to the first aspect of the present invention comprises a plurality of base fabrics sewn to form a bag. In an airbag body of an airbag device formed in a shape and inflated when the gas generator is actuated, the airbag body refracts a plurality of square base fabrics into a substantially U-shape. The U-shaped ends of the other square-shaped base fabrics are sewn to the ends near the U-shaped central portion of the square-shaped base fabric in a continuous state, and the first square-shaped base fabric is sewn in a continuous state. The U-shaped both ends of the base cloth are sewn together, and a communication hole is formed in the U-shaped central part of the base cloth located inside the bag body among the plurality of base cloths, and the inside of the bag body is formed. , A U-shaped central portion of the base fabric is formed on a strap for shape regulation.

Further, the airbag body of the airbag device according to the second aspect of the present invention is formed in a bag shape by sewing a plurality of base cloths, and is swelled when the gas generator is operated. In the airbag body of the airbag device, the airbag body refracts a plurality of square base fabrics into a substantially U-shape, and is provided at an end near the center of the U-shape of the first square base fabric. The U-shaped ends of the other square-shaped base fabrics are sewn in a continuous state by sewing, and the U-shaped ends of the first square-shaped base fabric are sewn to each other. A communication hole is formed in the U-shaped central portion of the base cloth located inside the bag body of the base cloth, and the U-shaped central portion of the base cloth located inside the bag body is a strap for shape regulation. And upper and lower base fabrics are sewn to upper and lower opening portions of the bag body, respectively.

[0008]

According to the airbag body of the airbag device according to the first aspect of the present invention, the plurality of square base cloths are bent into a substantially U-shape, and the first square base cloth is formed into a U-shape. The U-shaped ends of the other square base fabrics are sewn in a continuous state by sewing the U-shaped ends of the other square base fabrics to the end portions near the center portion, respectively, and the U-shaped ends of the first square base fabric are joined together. Is sewn, a communication hole is formed in the U-shaped central portion of the base cloth located inside the bag body among the plurality of base cloths, and the U-shaped base cloth positioned inside the bag body is formed. Since the center part is formed on the strap for shape regulation,
There is no need to separately form a strap for shape regulation, and the operation of sewing the strap to the airbag body can be omitted, and the sewing operation can be performed simply and quickly.

According to the airbag body of the airbag device according to the second aspect of the present invention, the plurality of square base fabrics are bent in a substantially U-shape, and the first square base fabric is formed into a U-shape. The U-shaped ends of the other square base fabrics are sewn in a continuous state by sewing the U-shaped ends of the other square base fabrics to the end portions near the center portion, respectively, and the U-shaped ends of the first square base fabric are joined together. Is sewn, a communication hole is formed in the U-shaped central portion of the base cloth located inside the bag body among the plurality of base cloths, and the U-shaped base cloth positioned inside the bag body is formed. The central portion is formed on a strap for shape regulation, and upper and lower base fabrics are sewn to upper and lower open portions of the bag body, respectively.
There is no need to separately form a strap for shape regulation, and the operation of sewing the strap to the airbag body can be omitted, and the sewing operation can be performed simply and quickly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An airbag body of an airbag device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 (a),
(B), FIGS. 2 and 3 schematically show an embodiment of an airbag body of an airbag device according to the present invention. The airbag device 11 has a fixed side on which a base plate is attached to a door 10 side. Is shown, but it can be on the instrument panel side or the steering side, and it is attached to an appropriate position such as the back of the seat back.

As shown in FIG. 3, the airbag device 11 has a gas generator 13 fixed to a base plate by fixing members such as bolts and nuts. Airbag body 2
Reference numeral 1 is fixed to a base plate by a fixing member such as a bolt or a nut via a retainer similarly to the gas generator 13.

As shown in FIGS. 1A and 1B, the airbag body 21 of the airbag device 11 is formed in a bag shape from a plurality of rectangular base fabrics 23. In the present embodiment, as the plurality of base cloths 23, three square base cloths 23a, 23
Although 3b and 23c are used, four or more base cloths 23 can be used.

The plurality of square base cloths 23 are bent or curved in a substantially U-shape, respectively, and the first square base cloth 2 is formed.
The next square base cloth 23b is provided on the U-shaped central part 25 of 3a.
The end portions 26a of the U-shaped side portions 26 are sewn in a continuous state.

A plurality of communication holes 28 are formed in the U-shaped central portion 25 of the base fabrics 23a and 23b in which the central portion 25 is located inside the bag.
A U-shaped central portion 25 of a and 23b is formed on a strap 27 for shape control.

In this embodiment, three square base cloths 2 are used.
Although 3a, 23b and 23c are formed in substantially the same shape, they may be formed in different sizes. For example, only the square base cloth 23a can be formed larger than the other base cloths so that the bag body does not become smaller when the both ends 26a, 26a are sewn. Also, both ends 26a, 26a
A base cloth having the same size as the strap 27 can be sewn to the bag 27 so that the size of the bag defined by the strap 27 can be made uniform. Further, the size, shape, and the like of the plurality of communication holes 28 are not limited to those shown in the drawings, and various modifications can be made.

A gas ejection opening 31 is formed below the central base cloth 23b, and a small hole 32 for bolt insertion is formed along the outer periphery of the gas ejection opening 31. The gas generator 13 is attached to the gas ejection opening 31.

As shown in FIG. 1 (b), an end 25a of the U-shaped central portion 25 of the first square base cloth 23a is attached to one side 26 of the next square base cloth 23b. End 26a
Is sewn to form a sewn portion 41, and then the base fabric 23b
The end 26a of the U-shaped one side 26 of the next square base cloth 23c is sewn to the end 25a of the U-shaped central portion 25 to form a sewn portion 42.

Next, the end 26b of the U-shaped side 26 of the next square base cloth 23c is sewn to the end 25b of the U-shaped central part 25 of the base cloth 23b. 43 is formed, and the end 26b of the U-shaped one side portion 26 of the next square base fabric 23b is sewn to the end 25b of the U-shaped central portion 25 of the first square base fabric 23a. The sewn portion 44 is formed.

As shown in FIG. 2, the first square base fabric 2
The ends 26a and 26b of the U-shaped side portions 26 of 3a are sewn to form a sewn portion 46. The upper and lower open portions 51 and 52 on the side of the bag body are sewn to form sewn portions 53 and 54, and the airbag body 21 is formed in a bag shape.

It is also possible to sew a reinforcing cloth separately formed on the gas ejection opening 31 on the lower side of the central base cloth 23b.

4 and 5 show different embodiments of the present invention. Parts corresponding to those of the above-described embodiment are denoted by the same reference numerals, and further detailed description is omitted.
Upper and lower base cloths 5 are provided at upper and lower opening portions 51 and 52 on the side portions of the bag body.
6 and 57 are sewn, and the gas ejection opening 3 is
It has the same configuration as that of the above-described embodiment, except that a small hole 1 and a small hole 32 for bolt insertion are formed.

The U-shaped central portion 2 of the base fabrics 23a and 23b located inside the bag body constituting the airbag body 21
5 is formed on the shape regulating strap 27, it is not necessary to separately form the shape regulating strap 27, and the work of sewing the strap 27 inside the airbag body 21 can be omitted. Wearing work can be performed simply and quickly.

[0023]

The above is the configuration of one embodiment of the airbag body of the airbag apparatus according to the present invention. According to the airbag body of the airbag apparatus according to the first aspect of the present invention, a plurality of airbag bodies are provided. The square base fabric is bent into a substantially U-shape, and the U-shaped ends of the other square base fabrics are sewn to the end near the center of the U-shape of the first square base fabric, respectively. Sewn in a continuous state, the U-shaped both ends of the first square base fabric are sewn together, and the U-shaped base fabric of the plurality of base fabrics located inside the bag body. A communication hole is formed at the center of the bag, and the U-shaped center of the base cloth located inside the bag body is formed on the strap for shape regulation. Therefore, it is necessary to separately form a strap for shape regulation. This eliminates the need to sew the strap onto the airbag body, making it easier and faster to sew. Can.

Further, according to the airbag body of the airbag device according to the second aspect of the present invention, the plurality of square base cloths are bent in a substantially U-shape, and the first square base cloth is bent. The U-shaped ends of the other square base fabrics are sewn to the ends near the center of the U-shape, respectively, and sewn in a continuous state, and the U-shaped ends of the first square base fabric are sewn. Parts are sewn together, a communication hole is formed in a U-shaped central portion of the base cloth located inside the bag body among the plurality of base cloths, and a U-shape of the base cloth positioned inside the bag body is formed. The central part of the shape is formed on the strap for shape regulation,
Since the upper and lower base cloths are sewn to the upper and lower opening portions of the bag body, it is not necessary to separately form a strap for shape regulation, and the work of sewing the strap to the airbag body can be omitted. Wearing work can be performed simply and quickly.

According to the present invention, the strap for regulating the shape of the airbag body is formed integrally with the airbag body, the shape of the airbag body can be reliably regulated, and the sewing operation of the airbag body and the strap is simplified. Thus, the cost can be reduced, the economic efficiency can be improved, and the airbag body of the airbag device excellent in safety can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of an airbag body of an airbag device according to the present invention, in which (a) is a front view before sewing a base cloth, and (b) is a state in which side parts of the base cloth are sewn. FIG.

FIG. 2 is a perspective view of the airbag device according to the present invention in a state where upper and lower opening portions on side portions of an airbag body are sewn.

FIG. 3 is a sectional view showing a state where the airbag device according to the present invention is incorporated in a vehicle.

FIG. 4 is an exploded perspective view showing a different embodiment of the airbag body according to the present invention.

FIG. 5 is a perspective view showing a different embodiment of the airbag body according to the present invention.

DESCRIPTION OF SYMBOLS 10 Door 11 Airbag device 13 Gas generator 21 Airbag body 23 Base cloth 23a Base cloth 23b Base cloth 23c Base cloth 25 Central part 26 Side part 27 Strap 28 Communication hole 31 Gas ejection opening 41 Sewing part 42 Sewing part 43 Sewing part 44 Sewing part 46 Sewing part 51 Opening part 52 Opening part 53 Sewing part 54 Sewing part 56 Base cloth 57 Base cloth

Claims (2)

(57) [Claims] 1. A bag formed by sewing a plurality of base fabrics,
In the airbag body of the airbag device adapted to inflate when the gas generator is activated, the airbag body refracts a plurality of square base fabrics into a substantially U-shape to form an initial square base fabric. The U-shaped ends of the other square-shaped base cloths are sewn to the end near the U-shaped central part of the cloth, respectively, and are sewn in a continuous state, and the U-shape of the first square-shaped base cloth is sewn. The two ends of the base cloth are sewn to each other, a communication hole is formed in a U-shaped central portion of the base cloth located inside the bag body among the plurality of base cloths, and the base cloth positioned inside the bag body is formed. An airbag body of an airbag device, wherein a U-shaped central portion of the shape is formed on a strap for regulating the shape. 2. A bag formed by sewing a plurality of base fabrics,
In the airbag body of the airbag device adapted to inflate when the gas generator is activated, the airbag body refracts a plurality of square base fabrics into a substantially U-shape to form an initial square base fabric. The U-shaped ends of the other square-shaped base cloths are sewn to the end near the U-shaped central part of the cloth, respectively, and are sewn in a continuous state, and the U-shape of the first square-shaped base cloth is sewn. The two ends of the base cloth are sewn to each other, a communication hole is formed in a U-shaped central portion of the base cloth located inside the bag body among the plurality of base cloths, and the base cloth positioned inside the bag body is formed. An airbag body of an airbag device, wherein a U-shaped central portion is formed on a strap for shape control, and upper and lower base fabrics are sewn to upper and lower open portions of the bag body, respectively.