JP4979298B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device that protects an occupant by absorbing an impact during a collision.

  In the airbag device, when a sensor detects a collision, gas is filled in the airbag that is exploded by the inflator and is deployed and inflated between the vehicle and the occupant. And after stopping the passenger | crew receiving with the inflated airbag, the gas which flows out from the exhaust hole provided in the airbag absorbs the impact which acts on the passenger | crew.

  Such an air bag has many parts and man-hours due to the presence of the exhaust holes, and the thickness and strength of the air bag are different between the exhaust hole part and other parts, making it difficult to fold.

Therefore, as shown in FIG. 4, one base fabric 1 in which a notch portion 1a is formed on a part of the outer periphery and the other base fabric 2 on which the notch portion is not formed on the outer periphery are overlapped to remove the notch portion 1a. Patent Document 1 proposes an airbag 3 having a cutout portion 1a as an exhaust hole by sewing an outer peripheral portion. In addition, 4 in FIG. 4 shows an outer periphery sewing line, 5 shows the opening part for attaching to an inflator.
JP-A-9-11845

  The airbag proposed in Patent Document 1 is easy to manufacture and can be easily folded even if there is an exhaust hole.

  However, when the exhaust hole is formed with a notch as in the airbag 3 proposed in Patent Document 1, the shape is not stable, and the sewing work on the outer peripheral portion becomes unstable. Moreover, since the notch is formed in the outer periphery of one base fabric, alignment with the other base fabric is difficult. Furthermore, since the outer peripheral sewing portion has one base cloth, it is difficult to stabilize the quality of the sewing pitch.

  The problems to be solved by the present invention are that the conventional airbag that is easy to manufacture and easy to fold becomes unstable in the sewing work on the outer periphery, makes it difficult to align the base fabrics, and further increases the sewing pitch. The quality of the is not stable.

The airbag apparatus of the present invention is
An airbag and an inflator for injecting gas into the airbag;
The airbag is
Consisting of at least two base fabrics,
1) Exhaust openings are provided on the outer periphery of the at least one base cloth near the outer periphery sewing line, and at least the outer periphery sewing line extends from both sides of the exhaust opening toward the outer periphery. A slit reaching up to
Or
2) An exhaust cutout extending from the outer periphery of at least one base fabric to the inside beyond the outer periphery sewing line is provided , and an auxiliary base fabric is provided at a position of the cutout portion covering at least the outer periphery sewing line , The auxiliary base fabric and the base fabric are to be the outer periphery sewing portion ,
Is the most important feature.

  In the airbag device of the present invention, since there is no single base cloth in all the outer periphery sewing line portions, the outer peripheral portion can be stably sewn. Moreover, the quality of the sewing pitch is stabilized.

  In addition, in the case of the configuration 1) (hereinafter referred to as the former), the base fabrics to be sewn can be easily aligned. Further, when the gas flows out from the exhaust hole, the exhaust opening extends to the outer periphery sewing line, so that the impact acting on the occupant is more easily absorbed.

  In the former invention, the slit reaching at least the outer periphery sewing line includes not only the slit reaching the outer periphery sewing line but also a slit provided to the vicinity of the outer peripheral edge beyond the outer periphery sewing line.

  On the other hand, in the airbag device of the present invention having the configuration of 2) (hereinafter referred to as the latter), the length of the auxiliary base fabric in the outer peripheral direction at least at the outer peripheral sewing line position matches the cutout portion. In this case, since the sewing part of the auxiliary base fabric has two base cloths to be sewn as well as the other parts, it does not become difficult to fold.

  According to the present invention, even when an exhaust hole is formed in an airbag that does not increase the number of manufactured parts and manufacturing man-hours and is easy to fold, the shape is stable and the outer periphery can be stably sewn. In addition, since the sewing part does not have one base cloth, the quality of the sewing pitch is stabilized.

Hereinafter, various embodiments and best modes for carrying out the present invention will be described with reference to FIGS.
FIG. 1 is a view showing the vicinity of an exhaust hole of an airbag apparatus of the present invention having the former configuration, and FIGS. 2 and 3 are views showing the vicinity of an exhaust hole of the airbag apparatus of the present invention having the latter configuration. .

  In FIG. 1, reference numeral 11 denotes an airbag constituting the airbag device of the present invention, in which two base fabrics 12 and 13 made of, for example, woven cloth of the same shape are overlapped, and the vicinity of the outer peripheral edge is sewn to form a bag body. It is what became. In addition, 14 in FIG. 1 is the outer periphery sewing line which sewn the outer peripheral part vicinity of the said 2 base fabrics 12 and 13. FIG.

  In the present invention, one of the two base fabrics 12, 13, on the opposite outer peripheral side in the vicinity of the outer peripheral sewing line 14 of the base fabric 12, that is, on the bulging center side of the airbag 11 filled with gas from the inflator, For example, a rectangular exhaust opening 15 is provided.

  The exhaust openings 15 are preferably provided at positions where the outflowing gas does not directly hit the passenger, and the number thereof is determined by the size of the exhaust openings 15 to be provided.

  In such an airbag 11, there are not many production parts and production steps, and since only the two base fabrics 12 and 13 are overlapped and the outer peripheral edge is sewn, folding can be easily performed. Further, since the exhaust opening 15 can be arranged at the center of the bulge of the airbag 11, in the case of a side airbag, it is possible to prevent the exhaust hole from being blocked by a door trim or the like.

  In addition, since the shapes of the two base fabrics 12 and 13 are the same, it is possible to easily perform alignment at the time of overlapping. Moreover, since the shape is stable, the sewing work of the outer peripheral portion can be performed stably. Furthermore, the sewing part on the outer periphery does not have a single base cloth, so that the quality of the sewing pitch is stabilized.

  Further, in the present invention, the slit 16 reaching the outer peripheral edge of the exhaust opening 15 from both sides in the outer peripheral direction toward the outer peripheral edge, for example, beyond the outer peripheral sewing line 14 is provided. Since such a slit 16 is provided, in addition to the above-described effect, when gas flows out from the exhaust opening 15, the outer peripheral edge of the exhaust opening 15 extends to the outer periphery sewing line 14 and acts on the occupant. Can be absorbed more easily.

  As shown in FIG. 1, the airbag device of the present invention is not limited to the one provided with the exhaust opening 15 on the outer peripheral edge side in the vicinity of the outer peripheral sewing line 14 of one base fabric 12. For example, instead of the exhaust opening 15, as shown in FIG. 2, a rectangular cutout portion 17 is provided from the outer peripheral edge of one base fabric 12 to the inside beyond the outer peripheral sewing line 14. Further, an auxiliary base cloth 18 may be provided in a portion covering the outer periphery sewing line 14.

  In the example shown in FIG. 2, the shapes of the two base fabrics 12 and 13 are not the same, so the alignment at the time of superposition is slightly worse than in the example shown in FIG. 1. Further, since the outer peripheral sewing parts are the base cloths 12 and 13 and the auxiliary base cloth 18, it becomes slightly difficult to fold. However, except for the above two points, it has the same effect as the example shown in FIG.

  Further, as shown in FIG. 3, if the length of the auxiliary base fabric 18 in the outer peripheral direction at least at the outer peripheral sewing line 14 is made to coincide with the length of the cutout 17 in the outer peripheral direction, the outer peripheral sewing is performed. The part becomes two sheets of the base cloth 13 and the auxiliary base cloth 18. Therefore, it is possible to eliminate the disadvantage that the folding becomes slightly difficult.

  In the present invention, it is needless to say that the embodiment may be appropriately changed within the scope of the technical idea described in the claims, such as the exhaust opening 15 and the cutout portion 17 are not limited to a rectangular shape as described above. Yes.

  In the above example, the airbag apparatus employing the structure of the present invention has been described as being installed in an automobile. However, the airbag apparatus may be provided in a vehicle such as an aircraft or a ship other than a vehicle. Further, it can be applied not only to the driver seat and the passenger seat but also to the side airbag.

It is the figure which showed the principal part of the 1st example of the airbag which comprises the airbag apparatus of this invention. It is the figure which showed the principal part of the 2nd example of the airbag which comprises the airbag apparatus of this invention. It is the figure which showed the principal part of the 3rd example of the airbag which comprises the airbag apparatus of this invention. It is the figure which showed the airbag which comprises the conventional airbag apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Air bag 12, 13 Base fabric 14 Outer periphery sewing line 15 Exhaust opening 16 Slit 17 Cut-out part 18 Auxiliary base fabric

Claims (3)

An airbag and an inflator for injecting gas into the airbag;
The airbag is
Consisting of at least two base fabrics,
An exhaust opening is provided on the side of the outer periphery near the outer periphery sewing line of at least one base fabric,
An air bag device comprising a slit that reaches at least the outer peripheral sewing line from both sides of the exhaust opening toward the outer peripheral edge. An airbag and an inflator for injecting gas into the airbag;
The airbag is
Consisting of at least two base fabrics,
Providing an exhaust cutout extending from the outer peripheral edge of at least one base fabric to the inside beyond the peripheral sewing line;
This cutout, an auxiliary base fabric in a position to cover at least the outer peripheral sewing line, the airbag device the base fabric with the auxiliary base fabric, characterized in that as the outer peripheral sewing portion. The airbag apparatus according to claim 2, wherein a length of the auxiliary base fabric in an outer peripheral edge direction at least at an outer peripheral sewing line position matches the cutout portion.

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