JP2007099006A - Air bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a sewing process by reinforcing a sewn part without adding a separate part and eliminating the work of positioning reinforcing cloth, etc. in the sewing process by providing a ground fabric constituting an air bag with an article equivalent to the reinforcing cloth in advance. <P>SOLUTION: This air bag is constituted by forming overturning parts 6, 6' on a connecting part of the end of the ground fabric 1 constituting the air bag, connecting terminal ends of the overturning parts 6, 6' to the end of the other ground fabric 2 and increasing widths of the overturning parts 6, 6' by a connecting flap of the end of the ground fabric 1 at the terminal end. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an airbag for a passenger's seat in which an air bag device for protecting an occupant in the event of a vehicle collision is improved at a joint portion when the airbag is manufactured.

The airbag device is deployed in the event of a vehicle collision and is equipped to protect an occupant from impact.
For this reason, it is desirable that the airbag body be thicker when inflated, and that it is easy to sew when manufacturing the airbag.
As a conventional technique, there is an airbag formed by stitching two substantially trapezoidal panels, and an airbag for a passenger seat is sewn along each side by stitches of the two panels (for example, Patent Document 1). Reference) exists.
Japanese Unexamined Patent Publication No. 2000-25544 (see claims, paragraphs {0013} to {0031} of {DETAILED DESCRIPTION OF THE INVENTION} in the section of the detailed description of the invention, and FIGS. 1 to 10)

In the conventional technique, stress is applied at the time of deployment, and weak portions are generated at each corner stitching portion of the airbag. Therefore, another part is prepared as a reinforcing cloth and is reinforced. However, when another part such as a reinforcing cloth is added, it is necessary to consider the alignment of the parts in the sewing process, and there is a risk of forgetting to attach the parts. is there.
An object of the present invention is to provide an airbag that simultaneously solves the above two problems.

A first invention of the present invention for solving the above-described problems is an airbag as described in claim 1, and is as follows.
An inversion portion is formed at a joint portion between the base fabric end portion and the other base fabric end portion constituting the airbag, and the end portion of the reverse portion is further joined to another base fabric end portion, and the base fabric end The joining joint of the part has a configuration in which the width of the inversion part is increased at the terminal part.

Since the airbag according to the present invention is configured as described above, the following effects are achieved.
(1) Since the base fabric constituting the airbag is provided in advance with the one corresponding to the reinforcing fabric, the sewn portion can be reinforced without adding another part.
(2) Work such as the positioning of the reinforcing cloth is eliminated during the sewing process, and the sewing process can be simplified.

  An inversion portion is formed at a joint portion between the base fabric end portion and the other base fabric end portion constituting the airbag, and a terminal portion of the inversion portion is further joined to another base fabric end portion, and the base fabric end The joining joint of the part is an airbag in which the width of the inversion part is increased at the terminal part.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view showing an embodiment of a base fabric on the side of a gas generator for sewing the airbag of the present invention, and FIG. 2 is one side base fabric opposite to the base fabric for sewing the airbag of the present invention. FIG. 3 is a front view showing an embodiment, and FIG. 3 is an enlarged view of a main part showing details of a sewing site when the airbag of the present invention is sewn.

The present invention is characterized in that a shape that can be used as a reinforcing cloth is imparted to the base cloth portion that exists only as a seam allowance in the prior art.
The shape of the base fabric forming the airbag has, for example, a mushroom shape as shown in FIGS.
As shown in FIGS. 1 and 2, the shape of the airbag base fabric is different because it is asymmetric in side view, that is, one side is larger when the airbag is deployed, and the other is smaller, so that any part of the occupant is further protected. This is because it is possible to change the occupant protection characteristics, and even if the base fabric has the same shape, there is no problem.
This base fabric portion is designed so that effective sewing is performed on the weak portion of the sewed airbag that seems to be stressed by a gas generator having a high gas pressure when the airbag is deployed. .

Next, the sewing process of the airbag of the present invention will be described with reference to the drawings.
(1) The point a in FIG. 1 and the point a ′ in FIG. 2, and the point b in FIG. 1 and the point b ′ in FIG. 2 are combined, opposite to the base fabric 1 and the gas generator on the gas generator side. The base fabrics 1 and 2 of the side base fabric 2 are overlapped.
(2) Sewing is performed so that the sewing line 3 in FIG. 1 and the sewing line 3 ′ in FIG. 2 overlap.
(3) The point c in FIG. 1 and the point c ′ in FIG. 2, the point d in FIG. 1 and the point d ′ in FIG. 2 are combined, and the sewing line 4 in FIG. 1 and the sewing line 4 ′ in FIG. Sewing on.
(4) The point a and the point c in FIG. At this time, the reversing part 6 is formed so that the outer side V on the base fabric side and the outer side W on the reversing part side completely overlap each other by folding back along the line e. Further, the point a ′ and the point c ′ in FIG. 2 are combined, and at the same time, the reversing part 6 ′ is bent so as to be outside when the airbag is completed. 1 and 2 are overlapped with the sewing lines 5 and 5 ', and the sewing lines 9 and 9' in the reversing portions 6 and 6 'are connected to the sewing lines 5 and 5'. Sew together in layers. At this time, the reversing part 6 in FIG. 1 and the reversing part 6 ′ in FIG. 2 which have a large sewing allowance intentionally according to the present invention are folded down so as to be understood in FIG.
(5) Further, similarly, the reverse parts 7 and 7 'on the opposite side are similarly folded to overlap the sewing lines 8 and 8', and further, the sewing lines 10 and 10 'in the reverse parts 7 and 7'. Are stitched together with the stitching lines 8 and 8 'to complete the sewing of the airbag.

At the time of (4) in the above procedure, when the reversing part 6 is bent, the reversing part 6 is folded along the line e so that the outer side V on the base fabric side and the outer side W on the reversing part side completely overlap. Is formed.
This is formed so that all the inversion parts 6, 6 ′, 7 and 7 ′ overlap in the same manner.

  As described above, the reversing portion 6 according to the present invention is tilted and sewn, thereby reinforcing the stitched portion of the airbag that is greatly affected by the gas pressure of the gas generator when the airbag is deployed. An air bag having high strength can be provided without sewing a cloth.

In addition, the inversion direction of the inversion part of the said Example may incline together in the same direction (refer FIG. 3).
Moreover, in the said Example, although the inversion part 6 is provided in total four places by two places on each base fabric, even if it provides only in the base fabric of one side, there is no problem.
Furthermore, the location of the reversing part is not limited to the location shown in FIGS. 1 and 2, but can also be provided around the points a and a ′ and around the points c and c ′.
That is, it is only necessary that the reversing unit 6 is provided in a portion that can reinforce a portion that is greatly affected by the gas pressure from the gas generator when the airbag is deployed.

  In an airbag device incorporated in a vehicle and inflated and deployed at the time of a collision or the like, not only a passenger seat, but also an airbag mounted on all seats and inner wall surfaces can be used.

It is a front view which shows one Example of the base fabric by the side of the gas generator which sews the airbag of this invention. It is a front view which shows one Example of the base fabric on the opposite side of the said base fabric which sews the airbag of this invention. It is a principal part enlarged view which shows the detail of the sewing site | part at the time of sewing of the airbag of this invention.

Explanation of symbols

1 .... Gas generator side base fabric 2 .... Gas generator side opposite base fabric 3 .... Sewing line 3 '... Sewing line 4 .... Sewing Wearing line 4 '... Sewing line 5 ... Sewing line 5' ... Sewing line 6 ... Reversing part 6 '... Reversing part 7 ... Reversing part 7 '... Reversing part 9 ... Sewing line in reversing part 9' ... Sewing line 10 in reversing part 10 ... Sewing line in reversing part 10 '... In reversing part Sewing line e .... Reversal line V .... Outer side of base fabric side W .... Outer side of reversing part side

Claims (1)

An inversion portion is formed at a joint portion between the base fabric end portion and the other base fabric end portion constituting the airbag, and a terminal portion of the inversion portion is further joined to another base fabric end portion, and the base fabric end The airbag is characterized in that the width of the reversing portion is increased at the terminal portion of the joint white of the portion.

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