Method of manufacturing cushion for front passenger seat air bag device

Abstract

Achieved is a cushion for a front passenger seat air bag device such that the capacity is reduced, and that moreover, coaction during inflation and deployment is stabilized. Disclosed is a method of manufacturing the cushion (10) for the front passenger seat air bag device (1) such that base fabrics constitute a main panel (12) and left and right side panels (14), and that the side edges of the main panel (12) and those of the left and right side panels (14) are sewn together, with the result that the cushion (10) is provided with a shape portion having an arbitrary radius of curvature. The main panel (12) and the side panels (14) are sewn together in such way that a rectangular opening is formed in the portion where the main panel (12) and the side panels (14) start to be sewn together and where this sewing operation is completed, the length of the short sides of the rectangular opening being equal to the width of the ends of the side panels (14), and the length of the long sides of the rectangular opening being equal to the width of the ends of the main panel (12). Subsequently, the short sides are tucked into the opening. Thereafter, the short sides and the long side are sewn together, and thereby the shape portion having the arbitrary radius of curvature is formed.

Description

technical field [0001] The present invention relates to a method of manufacturing a shock absorber of an airbag device, and more particularly to a method of manufacturing a shock absorber of an airbag device for a passenger's seat. Background technique [0002] Usually, the airbag device for the passenger seat is housed in the instrument panel of the vehicle. When the vehicle stops suddenly due to a collision or the like, the airbag device receives the supply of gas from the inflator mounted on the airbag device, and the airbag device is set on the instrument panel. The deployment door on the upper surface of the panel starts to inflate and expand between the windshield (front window) and the passenger in the passenger seat to protect the passenger in the passenger seat. [0003] This airbag device for a passenger's seat is in contact with a windshield or an upper surface of an instrument panel when inflated and deployed, thereby stabilizing its behavior. However, in the ca...

AI Technical Summary

Problems solved by technology

[0016] However, when sewing the base fabrics constituting the main panel and the side panels, at first the ends of the main panel are sewed together, and in this state, the side edges of the side panels are overlapped on the side edges of the main panel. If the seam is sewn, even if there is a misalignment between the base fabrics during sewing, the misalignment cannot be absorbed. Therefore, wave-like undulations (wrinkles) are generated on the above-mentioned seamed part, and when the gas from the inflator is filled, gas leakage occurs, or extreme In the case that the part breaks and other problems occur

[0017] In particular, when sewing along a joining line with a small curvature, misalignment is likely to occur between the base fabrics constituting the main panel and the side panels. In the above-mentioned sewing method, for example, the above-mentioned protrusion cannot be formed.

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