JPH03136941A - Air bag device - Google Patents

Abstract

PURPOSE:To enhance pressure resistance by making a sewing margin large for the sewing-on section of an outer circumferential periphery the direction of which is perpendicularly intersected with or in parallel with the longitudinal and transverse weave patterns of a ground fabric forming the rear side and front side members of an air bag main body, and thereby making the sewing-on section of the outer circumferential periphery uniform in strength. CONSTITUTION:Out of the sewing-on sections 16 of the outer circumferential peripheries of a front side member 12 and a rear side member 13, a sewing margin 17 the direction of which is perpendicularly intersected or in parallel with the longitudinal and transverse weave patterns of a ground fabric, is made larger than the sewing margin 18 of the sewing-on section 16 in the bias direction. This thereby enables the sewing-on section 16 of the outer circumferential periphery to be uniform in strength over the whole of a circumference, thereby making it possible to enhance pressure resistance remarkably.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an airbag device that protects occupants in the event of a collision of a vehicle, etc. More specifically, the present invention relates to an airbag device that protects occupants in the event of a collision of a vehicle, etc. The present invention relates to an airbag device comprising:

[Conventional technology]

2. Description of the Related Art Airbag devices have been known as protection devices for occupants of vehicles and the like. This air bag device is disclosed in Japanese Patent Publication No. 56-43890 and Japanese Utility Model Publication No. 61-18564.
Publication No. 2 etc. exist.

Further, as shown in FIG. 4, a gas generator 2 is fixed to a base plate 1 attached to a fixed side of a steering wheel, etc., and an airbag body 3 having a gas inlet 4 is attached to a retainer 5.
When the gas generator is activated under predetermined conditions, gas instantaneously flows into the airbag body 3, causing the airbag body 3 to inflate instantaneously. .

The airbag main body 3 is formed by sewing together the outer peripheries of a front side member 3a and a rear side member 3b, which are made of two circular base fabrics such as cloth materials. The gas inlet 4 is formed.

The outer peripheral edges of the front side member 3a and the rear side member 3b are left with a seam allowance 6 of a uniform width regardless of the vertical and horizontal weave directions of the base fabric forming the front side member 3a and the rear side member 3b. It was cut and sewn. In FIG. 3, reference numeral 7 indicates a sewn portion.

[Problem to be solved by the invention]

However, since the conventional airbag body 3 is cut leaving a seam allowance 6 of a uniform width regardless of the weave direction of the base fabric, sewing in a direction perpendicular or parallel to the weave direction of the base fabric is not possible. The strength of the parts 7a, 7a was lower than that of the sewn part 7b in the direction inclined to the weave direction of the base fabric, that is, in the bias direction. Therefore, when the airbag body 3 is inflated, the sewn portion 7 is located in a direction perpendicular or parallel to the weave direction of the base fabric.
There was a risk that parts a and 7a would break.

An object of the present invention is to provide an airbag device that can obtain a sewn portion of uniform strength regardless of the weave direction of the base fabric, has significantly improved pressure resistance, and is excellent in safety.

[Means to solve the problem]

The present invention has been made in view of the above-mentioned problems, and includes an airbag device including an airbag main body connected to a gas generator, in which the airbag main body is fixed to a gas injection port side of the gas generator. It consists of a rear side member in which an inlet is formed and a front side member sewn along the outer periphery of the rear side member, and the base fabric forming the rear side member and the front side member of the airbag main body is Also, the seam allowance of the sewn portion of the outer peripheral edge in a direction perpendicular to or parallel to the horizontal weave direction is formed to be large.

[Effect]

According to the present invention, the seam allowance of the sewn portion of the outer peripheral edge in the direction perpendicular or parallel to the vertical and horizontal weave directions of the base fabric forming the rear side member and the front side member of the airbag main body is formed large. However, since the strength of the seams in the direction perpendicular or parallel to the weave direction has been increased, the strength of the seams on the outer periphery of the rear side member and front side member of the airbag body can be made uniform. It is something that can be done.

〔Example〕

The airbag device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 schematically shows an embodiment of an airbag device according to the present invention, and shows an airbag body 1 of the airbag device.
1 is formed from a front side member 12 that comes into contact with the passenger side, and a rear side member 13 in which a gas inlet 14 is formed.

The airbag main body 11 is configured such that the gas inlet 14 side of the rear side member 13 is fixed to the gas outlet side of a gas generator (not shown).

The front side member 12 and the rear side member 13 of the airbag main body 11 are formed from a base fabric made of cloth or the like coated with a synthetic resin sheet, and the outer peripheral edges of the front side member 12 and the rear side member 13 are sewn together. An airbag body 11 is formed.

In the embodiment shown in FIG. 1, the vertical and horizontal weave directions of the base fabric forming the front side member 12 and the rear side member 13 are shown in the same direction, and in this state, the base fabric The seam allowance 17 of the sewn portion 16 on the outer peripheral edge in the direction perpendicular or parallel to the vertical and horizontal weave directions (vertical direction and horizontal direction in the figure) is formed to be large. In this embodiment, the sewing part 1
Although the case in which the sewn portion 6 is circular is shown, the sewn portion 16 is not limited to a circular shape and may be oval or polygonal.

Of the sewn parts 16 on the outer peripheral edges of the front side member 12 and rear side member 13, the seam allowance 17 in the direction perpendicular or parallel to the vertical and horizontal weave directions of the base fabric is used as the sewn part 16 in the bias direction. By forming the seam allowance larger than the seam allowance 18, the strength of the sewn portion 16 on the outer peripheral edge can be made uniform over the entire circumference, and the pressure resistance can be significantly improved. FIG. 2 shows a different embodiment of the present invention, in which the weave direction of the front side member 12 and rear side member 13 of the airbag body 11 is set at 45°.
The seam allowance 17 in the direction perpendicular or parallel to the weave direction of the base fabric of the front side member 12 and the rear side member 13 is formed larger than the seam allowance 18 in the bias direction, as in the above-mentioned embodiment. It is similar to

〔Effect of the invention〕

The above is the configuration of one embodiment of the airbag device according to the present invention. By forming a large seam allowance at the seam portion of the outer periphery in the direction perpendicular or parallel to the weave direction, the strength of the seam portion in the direction perpendicular or parallel to the weave direction is increased, so that the rear side member of the airbag body The strength of the sewn portion on the outer peripheral edge of the front side member can be made uniform, the pressure resistance can be significantly improved, and an airbag device with excellent safety can be obtained.

[Brief explanation of the drawing]

Figures 1 and 2 schematically show an embodiment of an airbag device according to the present invention, with Figure 1 being a rear view of the airbag body, and Figure 2 being a rear view of a modified example of the same. , FIG. 3 is a rear view of a conventional airbag main body, and FIG. 4 is a cross-sectional explanatory view of a conventional airbag device. In the figure, 11...Airbag body, 12...Front side member, 13...Rear side member, 14...Gas inlet, 16...Sewn part, 17.18...Seam allowance .

Claims (1)

[Claims] (1) In an airbag device including an airbag main body connected to a gas generator, the airbag main body includes a rear side member formed with a gas inlet fixed to the gas outlet side of the gas generator; It consists of a front side member sewn along the outer periphery of the rear side member, and is perpendicular or parallel to the vertical and horizontal weave directions of the base fabric forming the rear side member and front side member of the airbag body. An airbag device characterized in that the seam allowance of the sewn portion of the outer peripheral edge in the direction is formed to be large.