Method for manufacturing air bag, air bag, and seat device for vehicle

Abstract

Provided is a method for manufacturing an air bag having excellent durability. For an air bag (40), a welding die (60) is pressed against two sheets (41, 42) arranged in an overlapping manner from the overlapping direction of the sheets (41, 42), thereby forming a bag part (45) surrounded by a welding part (50) extending in a ring shape. Furthermore, the deposition die (60) is pressed against the outer surface (42s) of the sheet (42), thereby forming a deposition section (50) of the two sheets (41, 42), the deposition section (50) having a deposition bead section (80) between the two sheets (41, 42), the deposition bead section (80) protruding toward the inside of the pocket section (45). Furthermore, on the pressing surface (70) of the deposition die (60) with respect to the sheet (42), an inclined surface section (75) facing the overlapping direction of the sheets (41, 42) and the direction of the inside of the pocket section (45) is provided on the outer side of the pocket section (45) with respect to the formation position of the deposition bead section (80).

Description

technical field [0001] The present invention relates to a method for manufacturing an air bag, an air bag, and a vehicle seat device. Background technique [0002] Conventionally, for example, as shown in Patent Document 1, there is a vehicle seat device configured to expand and contract an air bag provided on the inner side of the seat skin to obtain the desired airflow of a passenger seated in the seat. relaxing effect. In addition, among the air bags used in such vehicle seats, for example, as disclosed in Patent Document 2, there is an air bag having a bag portion constituted by bonding two sheets. Furthermore, the use of such an air bag enables simplification of the structure. [0003] Patent Document 1: Japanese Patent No. 4305663 [0004] Patent Document 2: Japanese Patent Laid-Open No. 2015-96403 [0005] However, in the above-mentioned air bag, when the bag is filled with air and the bag is expanded, stress tends to concentrate on the portion where the sheets ar...

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned air bag, when the bag is filled with air and the bag is expanded, stress tends to concentrate on the portion where the sheets are joined together, that is, the peripheral portion of the bag.

Therefore, in the case where an excessive load is applied to the bag portion, there is a possibility that a rupture may be formed at the peripheral edge portion, so there is still room for improvement in this proposal.

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