JP2003072503A - Airbag for side part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the airtightness of a joining part of an airbag cloth, and prevent the joining strength in a window side unfolding type airbag for a side part to which a long unfolding time is required. SOLUTION: In the airbag for the side part in which a bag part 1a is formed by overlapping or folding cloths 8 and 9 which are sealed in a substantially airtight manner by coating layers formed on an inner surface thereof, and joining outer peripheral parts thereof, and the bag part 1a is unfolded toward the side of the window of a vehicle, the outer peripheral parts are joined by providing a sewn part 3 for sewing cloths to joining surfaces 8a and 9a with the coating layers 10 joined with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side airbag which is deployed from a pillar portion or a roof side portion to the side of a vehicle window, and more particularly, the airtightness of an airbag joint portion is increased to extend inflation duration. The present invention relates to a lengthened side airbag.

[0002]

2. Description of the Related Art An airbag device is a device for restraining an occupant by inflating an airbag when a vehicle collides, and generally comprises an inflator which is a gas generator and an airbag which is inflated by the gas of the inflator. .

The above-mentioned airbag device is not limited to one that restrains the occupant from the front, but in recent years, a device that restrains the occupant from the side has been developed. Above all, for the side part for deploying the airbag to the side part of the window of the vehicle. The airbag device needs to store the airbag around the window portion of the vehicle and deploy the airbag along the side surface of the passenger compartment.

Such side airbags are supplied with gas from, for example, an inflator (gas generator) fixed to a base of a front pillar, that is, a side panel of a vehicle, and the front pillar portion, roof side rail portion, The airbag stored in the center pillar and quarter pillars is an airbag that is deployed near the window along the side of the passenger compartment to restrain the occupant. It is possible to consider a mode in which a long inflation time of several seconds is maintained due to restraint of the occupant. In other words, an ordinary airbag has a function of inflating and deploying in a short time of about several msec to several tens of msec and exhausting air while restraining an occupant, whereas the newly proposed side airbag has a function of maintaining inflation time. 1 for the purpose of lengthening a few seconds
I am sorry.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and in a side airbag which is deployed to the side of a window portion of a vehicle, a joint portion of airbag constituent cloths. The present invention aims to increase the airtightness of the airbag and prolong the inflation duration by closely sealing the portion.

[0006]

SUMMARY OF THE INVENTION That is, the side airbag according to the present invention which meets the above-mentioned object is obtained by polymerizing a cloth which is almost airtightly sealed with a coating layer formed on the inner surface as described in claim 1. In the airbag for a side part, which is folded and formed, by joining the outer peripheral portions thereof to each other, and the outer peripheral portion of the bag portion is expanded to the side of the window portion of the vehicle, the outer peripheral portion is adhered to the coating layers. The structure is characterized in that a sewn portion for sewing cloths is provided on the joint surface.

Claims 2 to 4 are specific embodiments of the above constitution, and Claim 2 is that the coating layers are adhered to each other by a rubber paste or a rubber sheet.
According to a third aspect, the coating layers are adhered to each other by directly adhering the coating layers. Further, in the fourth aspect, the coating layer is formed of a rubber coating material such as chloroprene rubber or silicone rubber. Each is characterized by being formed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Referring to the accompanying drawings,
A specific embodiment of the present invention will be described.

FIG. 1 is a perspective view showing an example of a side airbag according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of an essential portion of FIG. 1. The airbag 1 is a front pillar portion of a vehicle. And a roof side rail portion (not shown), respectively, and an inflator (not shown) connected to the opening 2 connects the front pillar portion and the roof side rail portion along the side of the passenger compartment to the window portion of the vehicle. It is designed to expand laterally.

As shown in FIG. 2, the airbag 1 is formed by superimposing two cloths 8 and 9 of the same shape, or a symmetrical shape 1
After folding two pieces of cloth, the outer peripheral edges of the cloths 8 and 9,
That is, the bag portion 1a is formed by stitching the joint surfaces 8a and 9a in the figure, and at least the inner surfaces of the cloths 8 and 9 are coated with a rubber coating material such as chloroprene rubber or silicon rubber as shown in FIG. Coating layer 10 '
Are coated so that these cloths 8 and 9 can be kept airtight.

As shown in FIG. 1, the airbag 1 is sewn by the sewn portion 3 at the outer peripheral edge joint portion, and the remaining margin 4 of the sewn portion 3 is required to be extended at the upper portion of the airbag. A plurality of small holes 5 through which bolts and rivets are inserted are formed in the remaining extension portion while protruding, and mounting portions 6 to the front pillar portion and the roof side rail portion are formed.
Is said.

That is, in this airbag, the bags 8 and 9 which have been sealed in a substantially airtight manner are superposed on each other, and the outer peripheral portions thereof are joined to form the bag portion 1a. The bag portion 1a is developed to the side of the vehicle window. As shown in FIG. 3, a vulcanized rubber coating layer 10 is formed on each of the joint surfaces 8a, 9a of the cloths 8, 9 as shown in FIG. Glued by.
Vulcanized rubber coating layer 10 on the cloth bonding surfaces 8a, 9a
Are formed in the same process as the formation of the vulcanized rubber coating layer 10 'for sealing the cloths 8 and 9.

FIG. 4 is an enlarged cross-sectional view showing a joint portion of the side airbag of the second embodiment, and the cross section showing the entire airbag is the same as that shown in FIG. That is, in this side airbag, the vulcanized rubber coating layer 1 is formed on each of the joint surfaces 8a and 9a of the cloths 8 and 9 that are substantially airtightly sealed.
0, and a belt-shaped unvulcanized rubber sheet 12 is sandwiched between these coating layers 10, and the unvulcanized rubber sheet 12 is vulcanized and bonded to bond the outer peripheral portions of the cloths 8 and 9 to each other. Is going. The rubber coating layer 10 is formed integrally with the rubber coating layer 10 'for sealing the cloth.

Next, FIG. 5 is an enlarged sectional view showing a joint portion of the side airbag according to the third embodiment of the present invention, and the sectional view showing the entire airbag is the same as that shown in FIG. That is, in the side airbag 1, the coating layers 13 of unvulcanized rubber are formed on the joint surfaces 8a, 9a of the cloths 8, 9 that are substantially airtightly sealed, and the coating layers 13 are combined together. The outer peripheral portions of the cloths 8 and 9 are joined by being vulcanized and bonded by heating or pressure molding. In this case, as shown in FIG. 5, the unvulcanized rubber coating layer 13 is applied to the entire joint surfaces 8a and 9a of the cloths 8 and 9 to seal the cloths 8 and 9 and It is also possible to vulcanize and bond only the coating layer 13 on the joint surfaces 8a and 9a by heating or pressing only the joint surfaces 8a and 9a.

FIG. 6 shows a joint portion of a side airbag according to a fourth embodiment of the present invention, in which a coating layer 14 of thermoplastic polyurethane is attached to the joint surfaces 8a of the cloths 8 and 9,
The cloths 8 and 9 are sealed by being applied to the entire 9a side, and by heating only the joint surfaces 8a and 9a, only the coating layer 14 of the joint surfaces 8a and 9a is heat-melted, and the cloths 8 and 9 are It is also possible to join each other.
In any of the side airbags according to the embodiments, after the bonding surfaces 8a and 9a are bonded or bonded, the sewing surfaces 17 are sewn to the bonding surfaces 8a and 9a.

Finally, FIG. 7 is an enlarged cross-sectional view showing the joint portion of the side airbag according to the fifth embodiment of the present invention, and the overall shape of this airbag is the same as FIG. That is, the side airbag has a coating layer 10 of vulcanized rubber formed on each of the joint surfaces 8a, 9a of the airtightly sealed airbag cloths 8, 9 and a belt-like shape between the coating layers 10. The unvulcanized rubber sheet 16 is sandwiched, and the rubber sheet 16 is left unvulcanized and the bonding surface 8
The sewing 3 for sewing the cloths 8 and 9 to each other is applied to a and 9a. The vulcanized rubber coating layer 10 is a cloth 8,
9 is applied to the entire back surface, and the cloths 8 and 9 are sealed by the sealing coating layer 10 '. Therefore, in the method for manufacturing the side airbag of each of these embodiments, it is possible to easily and inexpensively seal the joint portion of the side airbag.

The embodiment of the present invention has been described above.
The term "coating" as used herein means applying a molten rubber or resin to a cloth and covering it with a film.

[0018]

As described above, in the side airbag according to the present invention, cloths hermetically sealed with the coating layer formed on the inner surface are overlapped, the outer peripheral portions thereof are joined, and the inner coating layers are adhered to each other. Since the joined surface is further sewn, the airtightness required for the side airbag can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing one form of a side airbag according to the present invention.

FIG. 2 is a schematic sectional view of a side airbag according to an embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view showing one embodiment of the joint portion of the side airbag according to the present invention.

FIG. 4 is an enlarged cross-sectional view showing a second embodiment of the joint portion of the side airbag according to the present invention.

FIG. 5 is an enlarged cross-sectional view showing a third embodiment of the joint portion of the side airbag according to the present invention.

FIG. 6 is an enlarged cross-sectional view showing a fourth embodiment of the side airbag joint according to the invention.

FIG. 7 is an enlarged sectional view showing a fifth embodiment of the side airbag according to the present invention.

[Explanation of symbols]

1 airbag 1a bag 2 openings 3 sewing section 4 Remaining charges for sewing 5 small holes 6 Mounting part 8,9 cloth 8a, 9a Bonding surface 10 Rubber coating layer 10 'Rubber coating layer for cloth seal 11 rubber glue 12 rubber sheet

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Claims (4)

[Claims] 1. A bag portion is formed by superposing or folding a cloth, which is substantially airtightly sealed with a coating layer formed on the inner surface, and joining the outer peripheral portions thereof, and the bag portion is formed on the window portion side of a vehicle. The side airbag to be deployed in one direction is characterized in that the outer peripheral portion is provided with a sewn portion for stitching cloths on a joint surface where the coating layers are adhered to each other. 2. The side airbag according to claim 1, wherein the coating layers are adhered to each other by a rubber paste or a rubber sheet. 3. The side airbag according to claim 1, wherein the coating layers are directly adhered to each other. 4. The side airbag according to claim 1, wherein the coating layer is formed of a rubber coating material such as chloroprene rubber or silicone rubber.