JPH07267032A - Air bag device for front passenger seat - Google Patents

Abstract

PURPOSE:To improve sewing manhours, material cost, the housing volume and a folding up method or the like of an air bag. CONSTITUTION:Partition cloth 10 to change a passage of inflator gas is arranged inside of an air bag, and both side parts 10a of this partition cloth 10 are respectively sewn on an upper surface part 4 or the like of the air bag so as to become almost parallel to the longitudinal direction of an air bag case 7, and a base end part 10b of this partition cloth 10 is superposed on a mouth part 3c of an air bag under surface part 6, and is fixed to the air bag case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger seat airbag device, and more particularly to a passenger seat airbag device in which a partition cloth for controlling a gas flow of an inflator is provided in the airbag.

[0002]

2. Description of the Related Art An air bag device is a safety device that protects an occupant by instantly inflating an air bag in the event of a vehicle collision, and usually includes an inflator which is a gas generator and an air bag which is inflated by the gas of the inflator. I have it. Then, in this airbag device, the gas ejected from the inflator fills the inside of the airbag to generate an internal pressure, and the airbag is deployed by this internal pressure.

By the way, the above-mentioned airbag device is not limited to the driver's seat, but a passenger's seat airbag device has been developed in recent years. Such an airbag device for a passenger seat is an airbag case containing an airbag bag body and an inflator. Is fixed in the instrument panel of the vehicle.

As one of such passenger seat devices, there is an airbag device disclosed in Japanese Patent Laid-Open No. 5-262195. In this device, another inner bag is arranged inside the airbag body. The gas from the inflator is first ejected to the inner bag, and then the gas is ejected again from the hole formed in the inner bag. As a result, the flow path of the inflator gas is regulated.

[0005]

However, in the above-mentioned conventional air bag, another one is provided inside the original air bag.
Since it has a double bag structure with an inner bag for the body, it requires a lot of sewing man-hours and the material cost is also high, and there are also problems with the folding storage capacity and folding method of the airbag. is doing.

The present invention addresses the above-mentioned actual situation, and instead of the conventional inner bag, a partition cloth for changing the flow path of the inflator gas is arranged in the airbag bag body by a predetermined method to sew. An object of the present invention is to provide an airbag that is significantly advantageous over the conventional airbag in terms of man-hours, material cost, storage volume, and folding method.

[0007]

That is, the feature of the airbag device of the present invention which meets the above object is that the mouth of the airbag is fixed to the opening of the airbag case, and the airbag is blown by the gas of the inflator. In a passenger side airbag device that is deployed in front of an airbag case, a partition cloth that changes the flow path of the inflator gas is arranged inside the airbag, and both sides of the partition cloth are substantially aligned with the front-back direction of the airbag case. They are sewn to the upper surface and / or the side surface of the airbag so that they are parallel to each other, and the base end of this partition cloth is overlapped with the mouth of the lower surface of the airbag and fixed to the airbag case. .

Furthermore, in the second airbag device of the present invention, a partition cloth for changing the flow path of the inflator gas is arranged inside the airbag as in the above, and the tip end portion or both side portions of the partition cloth is air-sealed. The upper surface and / or the side surface of the bag is sewn by temporary sewing to cut by the predetermined deployment pressure of the airbag, and the base end of the partition cloth is superposed on the mouth of the lower surface of the air bag. It is characterized by being fixed to the bag case.

In each of the airbags of the present invention, one to a plurality of gas circulation holes are formed in the partition cloth,
Alternatively, the both sides of the partition cloth are sewn in a U-shape or a U shape in which the front end side of the partition cloth is substantially continuous, and the partition cloth is sewn with an airbag to form a bag-like bag. It is also preferable to carry out the sewing together with or for the remaining margin of the sewing.

[0010]

In each of the above-described airbag devices of the present invention, the partition cloth that extends upward from the mouth portion of the airbag allows
The inflator gas preferentially flows into the upper part of the air bag body between the tip of the partition cloth and the upper surface of the air bag or through the gas flow hole. As a result, the airbag can be deployed in a predetermined design shape.

In the above airbag device of the present invention,
Since the partition cloth is sewn on the upper surface or the side surface of the airbag and the base end of the partition cloth is fixed to the airbag case together with the mouth of the airbag, the airbag can be folded. It is the same as a general passenger seat airbag that does not have a gas flow path control function, and there is no significant difference in terms of storage volume, material cost, or sewing man-hours compared to the general airbag.

[0012]

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

FIG. 1 is a perspective view showing an airbag device according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

In the airbag of this embodiment, two substantially triangular side surface cloths 2 are sewn on both sides of a body cloth 1 bent in a U shape, and a mouthpiece 3 is provided as a top as a whole. It has a pyramidal shape. Four cylindrical mouth portions 3a formed on the respective bases of the upper surface portion 4, the side surface portions 5, and the lower surface portion 6
3d is fixed to each side of the rectangular opening of the airbag case 7 via a retainer 8 with a bolt. This airbag is deployed in front of the airbag case 7 in the shape as shown by the gas of the inflator 9 inserted in the airbag case 7.

In the embodiment of the present invention, a trapezoidal partition cloth 10 for changing the gas flow path of the inflator 9 is arranged inside the airbag, and both side portions 10a of the partition cloth 10 are arranged.
Are sewn from the side surface portion 5 of the airbag to the upper surface portion 4 so as to be substantially parallel to the front-rear direction of the airbag case 7 by sewing 11 as shown in the drawing, and the base end portion 10b of the partition cloth 10 is attached to the airbag. It is adapted to be superposed on the mouth portion 3c of the lower surface portion 6 and fixed to the airbag case 7.

The area where both side portions 10a of the partition cloth 10 are overlapped and sewn may be only the upper surface portion 4 or both side surface portions 5 of the airbag, and the base end portion 10b is the mouth portion 3c of the airbag. It is also possible to sew it on in advance, or to separate it from the mouth portion 3c when the airbag is a single body so as to be tightened together by the retainer 8 when the case is attached. In the example shown in FIG. 1, the partition cloth base end part 10b is sewn on the outer periphery of the mouth part 3c so as to form another tubular shape.

Inflator gas flow G in this embodiment
As shown in FIG. 2, it generally passes between the tip end portion 10c of the partition cloth 10 and the airbag upper surface portion 4, and preferentially flows into the upper portion of the airbag.

On the other hand, the airbag device shown in FIGS. 3 and 4 is the second embodiment of the present invention, and the same members as those in the previous embodiment are designated by the same reference numerals and the description thereof will be omitted.

That is, in the airbag of this embodiment, both side portions 10a of the partition cloth 10 disposed in the airbag are arranged on both sides of the upper surface portion 4 of the airbag so as to be substantially parallel to the front-back direction of the airbag case 7. Each part is sewn by sewing 11. Then, the base end portion 10b of the partition cloth 10 is superposed on the mouth portion 3c of the airbag lower surface portion 6 to form the airbag case 7
It is fixed to.

The partition cloth 10 has two gas flow holes 12
Therefore, the flow of the gas G in this embodiment passes through the gas flow hole 12 other than between the tip portion 10c of the partition cloth 10 and the airbag upper surface portion 4 as shown in FIG. become.

5 and 6 show an airbag device according to the third embodiment of the present invention, in which the same members are designated by the same reference numerals and the description thereof is omitted.

That is, in the airbag of this embodiment, both side portions 10a of the partition cloth 10 arranged in the airbag are placed above the both side surface portions 5 of the airbag so as to be substantially parallel to the front-back direction of the airbag case 7. The two sewing pieces 11 (one of which is not shown) are sewn to each other by sewing 11, and the two pieces of sewing 11 (one of which is not shown) are provided in a U-shape which is continuous by sewing 11 'on the tip end side of the partition cloth 10. This U-shaped sewing does not necessarily have to be completely continuous. The base end portion 10b of the partition cloth 10 is also the mouth portion 3 of the airbag lower surface portion 6.
It is superposed on c and fixed to the airbag case 7.

As in the second embodiment, the partition cloth 10 is provided with two gas circulation holes 12, and therefore the flow of the gas G in this embodiment is as shown in FIG. Since the tip portion 10c of the
Will only pass through.

7 and 8 show an airbag device according to a fourth embodiment of the present invention, in which the same members are designated by the same reference numerals and the description thereof is omitted.

That is, in the airbag of this embodiment, both sides 10a of the partition cloth 10 arranged in the airbag are sewn by the sewing 11 which also serves as the sewing of the body cloth 1 and the side cloth 2 of the airbag. The both side portions 10a are sewn so that they are substantially parallel to the front-back direction of the airbag case 7. Then, the base end portion 10b of the partition cloth 10 is lowered downward as shown in FIG. 7, and is superposed on the mouth portion 3c of the airbag lower surface portion 6 and fixed to the airbag case 7.

A general development view of the body cloth 1 of this airbag is as shown in FIG. 8, and as shown in this figure, the partition cloth 1 is shown.
It is also possible to sew both side parts 10a of 0 to the sewing allowance of the main body cloth 1 in advance before sewing to the side cloth 2. The gas flow of the airbag of this embodiment is almost the same as that of the airbag of the first embodiment.

Further, FIG. 9 and FIG. 10 show an airbag of the airbag apparatus of the fifth embodiment of the present invention, which is formed of a one-piece cloth as seen from the development view shown in FIG. There is. That is, the airbag as shown in FIG. 9 is formed by stitching the corresponding sides of the three side surface triangular fabrics 13, 14, 15 formed on both sides of the airbag fabric of FIG. 10, respectively. To be done. Then, in this embodiment, as in the case of the fourth embodiment, both side portions 10a of the partition cloth 10 are sewn to the both side surface portions 5 of the airbag by the sewing 11 which also functions as the sewing of the side surface triangular cloths 13 and 14. And the base end 10 of the partition cloth 10
b is superposed on the mouth portion 3c of the lower surface portion 6 of the airbag and fixed to an airbag case (not shown).

In this embodiment as well, as in the fourth embodiment, both side portions 10a of the partition cloth are presewn to the airbag cloth as shown in FIG. 10 before sewing for forming the side surface portion. It is also possible.

Finally, FIG. 11 shows an airbag device according to a sixth embodiment of the present invention, and the same members are designated by the same reference numerals.

That is, the airbag of this device is the partition cloth 1
No. 0 tip portion 10c is sewn to the upper surface portion 4 of the airbag by temporary stitching 16 for cutting by the predetermined deployment pressure of the airbag when the inflator is actuated, and the base end portion 10b of the partition cloth 10 is attached to the lower surface of the airbag. Mouth part 3 of part 6
It is designed to be superposed on c and fixed to the airbag case 7. The partition cloth 10 has a width enough to laterally partition the airbag, and the temporary sewing 16 is applied to both sides of the partition cloth on the upper surface portion 4 or the side surface portion 5 of the airbag or both. It is possible.

Also in the airbag of this embodiment, as in the previous embodiment, one to a plurality of gas circulation holes are formed in the partition cloth 10, or temporary sewing of both sides of the partition cloth is performed. The partition cloth 10 is provided in a U-shape or a U shape that is substantially continuous on the tip side, and the temporary sewing of the partition cloth 10 with the airbag is performed together with the sewing for forming the airbag into a bag shape. Alternatively, it is also preferable to carry out the remaining margin of the sewing.

In the airbag of this embodiment, the temporary sewing 16 is cut by the deployment pressure of the airbag after the inflator 7 is actuated, but the partition cloth is present inside the airbag as shown in FIG. 2, for example. The inflator gas preferentially flows into the upper part of the airbag.

[0033]

As described above, in the passenger airbag device of the present invention, the partition cloth for changing the flow path of the inflator gas is disposed inside the airbag, and the tip end side of the partition cloth is air-sealed. It is sewn to the upper surface of the bag, etc., and the base end of this partition cloth is fixed to the airbag case by superimposing it on the mouth of the lower surface of the airbag, and it is passed upward from the mouth of the airbag. The partition cloth allows the inflator gas to pass through the space between the tip of the partition cloth and the upper surface of the airbag and to preferentially flow into the upper side of the airbag bag.

Further, according to the present invention, the partition cloth is sewn on the upper surface or the side surface of the airbag while having the above action.
Moreover, since the base end portion of the partition cloth is fixed to the airbag case together with the mouth portion of the airbag, the airbag folding method does not have a gas flow path control function for general passenger airbags. In the same way, the storage capacity, material cost, and sewing man-hours are almost the same as those of the above-mentioned general airbag, so that it is possible to manufacture an airbag significantly more advantageously than a gas flow control airbag having a conventional inner bag. It has a remarkable effect.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing an airbag device according to a second embodiment of the present invention.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a perspective view showing an airbag device according to a third embodiment of the present invention.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a perspective view showing an airbag device according to a fourth embodiment of the present invention.

FIG. 8 is a development view of the body cloth of the apparatus airbag.

FIG. 9 is a perspective view showing an airbag device according to a fifth embodiment of the present invention.

FIG. 10 is a development view of the airbag cloth of the device.

FIG. 11 is a perspective view showing an airbag device according to a sixth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body cloth 2 Side cloth 3,3a-3d Mouth part 4 Upper surface part 5 Side part 6 Lower surface part 7 Airbag case 8 Retainer 9 Inflator 10 Partition cloth 10a Partition cloth side part 10b Partition cloth base end part 10c Partition cloth tip part 11 Sewing 12 Gas flow holes 13, 14, 15 Triangular cloth 16 Temporary sewing

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toru Ozaki No.3 Ikugayama, Uchikoshi, Miyoshi-cho, Nishikamo-gun, Aichi Toyo Tire & Rubber Co., Ltd. Automotive Parts Technology Center

Claims (8)

[Claims] 1. An airbag device for a passenger seat, comprising a mouth portion of an airbag fixed to an opening portion of the airbag case, and a gas of an inflator for deploying the airbag in front of the airbag case. A partition cloth for changing the flow path of the inflator gas is arranged, and both side portions of this partition cloth are sewn to the upper surface portion or side surface portion of the airbag or both of them so as to be substantially parallel to the front-back direction of the airbag case. An airbag device for a passenger seat, characterized in that a base end portion of this partition cloth is superposed on a mouth portion of a lower surface portion of the airbag and fixed to an airbag case. 2. The airbag apparatus for a passenger seat according to claim 1, wherein at least one gas flow hole is formed in the partition cloth. 3. The airbag apparatus for a passenger seat according to claim 2, wherein the both sides of the partition cloth are sewn in a U-shape or a U-shape which is substantially continuous at the tip side of the partition cloth. 4. The sewing method according to claim 1, wherein the partition cloth is sewn with the airbag together with the sewing for forming the airbag into a bag shape or for the remaining margin of the sewing. Airbag device for passenger seat. 5. An airbag device for a passenger seat in which an opening of an airbag is fixed to an opening of the airbag case and the airbag is inflated in front of the airbag case by a gas of an inflator. A partition cloth that changes the flow path of the inflator gas is arranged, and the tip end or both sides of this partition cloth are cut on the upper surface and / or the side surface of the airbag by temporary sewing to cut the airbag with a predetermined deployment pressure. An airbag device for a passenger seat, which is sewn and fixed to an airbag case by superimposing a base end portion of the partition cloth on a mouth portion of a lower surface portion of the airbag. 6. The airbag apparatus for a passenger seat according to claim 5, wherein at least one gas flow hole is formed in the partition cloth. 7. The airbag apparatus for a passenger seat according to claim 6, wherein the temporary sewing of the partition cloth is performed in a U shape or a U shape. 8. The passenger seat according to claim 5, 6 or 7, wherein the temporary sewing of the partition cloth is performed together with the sewing for forming the airbag into a bag shape or for the remaining margin of the sewing. Airbag device.