Vehicular Airbag Wind-Up Device Groove Alignment
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Solution Overview
Problem
Existing methods for folding and winding vehicular airbags around a jig often result in misalignment, wrinkling, and difficulty in proper folding due to the airbag's length and the need for multiple operators.
Innovation Solution
A wind-up device featuring a base with an elongated plate shape, a rotatable bar with a groove, and movable members that guide and secure the airbag, ensuring proper alignment and winding by inserting the airbag's middle section into the groove and rotating the bar to wind the airbag around it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a long flat plate jig is used to fold and wind the airbag, then the airbag can be wound around the jig, but the airbag may be moved from the correct position or wrinkled during the process
Solution Approach 1:
The patent introduces a positioning member as an intermediary element between the jig and the airbag. This positioning member, which extends in the axial direction of the jig and has a width greater than the jig's width, acts as a mediator to guide and secure the airbag's intermediate portion during the winding process. This prevents the airbag from moving to incorrect positions or becoming wrinkled, while still allowing the winding operation to proceed easily.
2Productivity
If the airbag is folded and wound around the jig by multiple operators, then the airbag can be handled, but the appropriate performance of folding and winding becomes quite difficult
Solution Approach 1:
The positioning member is designed to enable the airbag winding process to be performed independently by a single operator. The positioning member's structure, which extends beyond the jig's width in the axial direction, allows the airbag to be automatically guided and positioned correctly during winding without requiring multiple operators to coordinate their actions. This self-positioning capability simplifies the overall process complexity.
3Ease of operation
If the airbag is placed on the jig for winding, then the winding operation can be performed, but the airbag may move from the correct position during folding and winding
Solution Approach 1:
The positioning member is pre-positioned on the jig before the airbag winding operation begins. This preliminary positioning ensures that when the airbag is placed on the jig, it is immediately guided by the positioning member into the correct position. The positioning member's extended structure creates a physical guide that prevents the airbag from moving to incorrect positions during the subsequent folding and winding operations, ensuring stable positioning throughout the process.
Data Source
AI summary
A wind-up device for winding up a vehicular airbag includes a base, a bar, and a first movable member. The base has an elongated plate shape extending in a first direction and includes a housing section that extends in the first direction. The vehicular airbag is placed on the base. The bar is disposed in the housing section and has a center axis extending in the first direction. The bar is rotatable around the center axis and includes a groove that extends in the first direction and is recessed from an outer surface of the bar toward the center axis. The first movable member extends in the first direction along the bar and is movable to be closer to the bar. The first movable member includes an insertion section that is to be inserted into the groove together with a portion of the airbag that is above the housing section.