JPH07205737A - Air bag for vehicle - Google Patents

Abstract

PURPOSE:To reduce a sewing spot in a gas flow path controlling cloth, in a vehicle use air bag providing the gas flow path controlling cloth attached so as to cover an opening part for an inflater and controlling a flow of gas of the inflater. CONSTITUTION:A reinforcing cloth 6 and a gas flow path controlling cloth 5, superposed on each other in the periphery of an opening part 4 of an air bag, are formed in a partly continued integral shape, to stitch the reinforcing cloth 6 to the periphery of the opening part 4 and on the other hand, to sew the gas flow path controlling cloth 5, folded back in a continued part 7, to an inflater side cloth 1.

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 a vehicle air bag device, and more particularly to a vehicle air bag in which a gas flow of an inflator is controlled by an internal cloth.

[0002]

2. Description of the Related Art An air bag as described above has an outer shape formed by, for example, superposing two circular cloths, an inflator-side cloth and an occupant-side cloth, and stitching the outer peripheral edges thereof. An opening into which the head of the inflator is inserted is formed at approximately the center of the inflator-side base cloth.

As shown in FIGS. 4 and 5, this airbag is for controlling the gas flow path so as to cover the opening 4 between the inflator side cloth 1 and the passenger side cloth (not shown). A cloth 9 is additionally provided, and the outer peripheral portion of the gas flow path control cloth 9 is partially sewn to the inflator-side cloth 1 by sewing 10.

That is, in the above-mentioned air bag, the jet gas G discharged from the inflator 1 hits the gas passage control cloth 9 and radially flows to the outer peripheral portion, and further the gas passage control cloth 9
The air bag is inflated into a flat shape through the flow path 12 formed between the sewn portions.

[0005]

However, in the above-mentioned conventional airbag, in order to form the gas passage, the gas passage control cloth is sewn in a plurality of intermittently divided states. Moreover, since the sewing must be performed firmly against the gas pressure of the inflator, the intermittent sewing pattern is a disadvantageous condition in the number of man-hours and the processing time when manufacturing the airbag.

The present invention copes with the above situation and integrally forms a reinforcing cloth and a gas flow path controlling cloth in the opening, thereby reducing the number of interrupted stitches and thereby improving the airbag. The purpose is to improve the production efficiency of.

[0007]

That is, the feature of the airbag of the present invention which meets the above-mentioned object is that the opening for attaching the inflator is formed in the inflator side cloth, and the gas flow path control is performed so as to cover the opening. An air bag for controlling the flow of gas of the inflator, which is additionally provided with a cloth, and a reinforcing cloth that polymerizes around the opening and the gas flow path controlling cloth are formed in a partially continuous integral shape, The reinforcing cloth is sewn around the opening, and the gas flow path control cloth is folded back at the continuous portion and sewn to the inflator side cloth.

[0008]

In the air bag of the present invention, the reinforcing cloth sewn around the opening and the gas flow path controlling cloth are formed in a continuous shape, so that the continuous portion with the reinforcing cloth is gas flow. As a substitute for strong sewing as a fixed part of road control cloth,
As a result, it is possible to reduce the number of the intermittent stitches for fixing the gas flow path control cloth by 1 to 2 places as compared with the conventional case.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a main part of an airbag according to an embodiment of the present invention, FIG. 2 is a sectional view of the same, and FIG. 3 is a plan view of a gas flow path control cloth. As shown in FIG. 1, in this airbag, the outer shape of the airbag is formed by stitching the outer peripheral edge portions of the inflator side cloth 1 and the passenger side cloth 2, and the inflator is approximately located at the center of the inflator side cloth 1. An opening 4 into which the head (not shown) is inserted, and a vent hole 3 is formed on the outer peripheral side thereof. As shown in FIG. 2, the opening 4 is formed on the inner surface of the airbag.
A gas flow path control cloth 5 is additionally provided so as to cover the inflator and controls the gas flow of the inflator.

Further, in the embodiment of the present invention, as shown in FIG. 3, the gas flow path controlling cloth 5 and the reinforcing cloth 6 which is superposed around the opening 4 are formed in a continuous shape in a part. Then, as shown in FIGS. 1 and 2, the entire inner and outer peripheral portions of the reinforcing cloth 6 are sewn around the opening 4 as usual, while the gas flow control cloth 5 is reinforced with the reinforcing cloth 6. It is folded back at the continuous portion 7 and is sewn to the two sides on the front end side by strong sewing 8.

That is, the gas flow path control cloth 5 is
Three places are equally fixed to the inflator side cloth 1 by the sewn portions 8 and the continuous portion 7 connected to the sewn reinforcing cloth 6. And these sewing 8 and continuous part 7
A space 12 is a flow path 12 for the inflator gas.

As the gas flow path control cloth 5 integrated with the reinforcing cloth 6, a pulling cloth such as one side silicone rubber of 66 nylon woven cloth or 66 nylon woven cloth can be used.

Further, the width of the continuous portion 7 of the gas flow path control cloth 5 and the reinforcing cloth 6 can be changed as appropriate, but the width is made wide as required and the vent hole 3 is formed as shown in FIG. By arranging the inflator gas in the shadow of the continuous portion 7, it is possible to prevent excess inflator gas from escaping from the vent hole 3 when the airbag is deployed.

However, in the airbag of the embodiment of the present invention, the reinforcing cloth 6 sewn around the opening 4 and the gas flow path controlling cloth 5 are formed so as to be partially continuous. As a result, the continuous portion 7 with the reinforcing cloth 6 serves as a fixed portion of the gas flow path control cloth 5 instead of strong sewing, whereby intermittent sewing 8 for fixing the gas flow path control cloth 5 is performed. Can be reduced to 1 or 2 places as compared with the conventional 4 places to 2 or 3 places.

The embodiment of the present invention has been described above.
8'indicates a planned sewing position.

[0017]

As described above, the vehicle air bag of the present invention is an air bag in which a gas flow path control cloth is attached so as to cover the opening of the inflator and the gas flow of the inflator is controlled. A part of the reinforcing cloth superposed around the opening and the gas flow path control cloth are continuously formed, and the reinforcing cloth is sewn around the opening, while the gas flow path control is performed. The fabric is folded back at the continuous portion and sewn to the inflator side fabric, and the reinforcing fabric sewn all around and the gas flow path control fabric are continuously and integrally formed to provide the reinforcement. The continuous part with the cloth serves as a fixed part instead of strong sewing, which reduces the number of intermittent sewing points for fixing the gas flow path control cloth, and reduces the man-hours and processing time at the time of manufacturing the airbag. Improve the production efficiency of It is intended to achieve the effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an airbag according to an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a plan view of a gas flow path control cloth.

FIG. 4 is a cross-sectional view showing a main part of a conventional airbag.

FIG. 5 is a plan view of the same.

[Explanation of symbols]

 1 cloth for inflator 2 cloth for passenger side 3 vent hole 4 opening 5 cloth for gas flow control 6 reinforcing cloth 7 continuous section 8 sewing

Continuation of front page (72) Inventor Tomohiro Sugiura 3 Miyoshi-cho, Nishikamo-gun, Aichi Large number Uchikoshi, Ikagayama Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center

Claims (1)

[Claims] 1. An air bag for a vehicle, wherein an opening for attaching an inflator is formed in the inflator side cloth, and a gas flow path control cloth is attached to cover the opening to control the flow of gas in the inflator. In the above, the reinforcing cloth superposed around the opening and the gas flow path controlling cloth are formed into a continuous part, and the reinforcing cloth is sewn around the opening, and the gas flow path is formed. An airbag for a vehicle, wherein a control cloth is folded back at the continuous portion and sewn to the inflator side cloth.