Restraint Hook Scallop for RIG Bar Engagement
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Solution Overview
Problem
Conventional vehicle restraints struggle to securely engage modified Rear Impact Guard (RIG) bars with complex geometries, such as pentagonal shapes, due to premature contact issues, which can prevent proper engagement and lead to incomplete restraint of trailers at loading docks.
Innovation Solution
The vehicle restraint system incorporates a restraint hook with a scallop or recessed feature along its shank, preventing premature contact with the RIG bar, allowing it to reach a raised position for secure engagement with both conventional and modified RIG bars, including those with increased depth and complex cross-sectional shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the restraint hook is designed to engage modified RIG bars with complex geometries, then the adaptability to different RIG bar configurations is improved, but the device complexity increases due to the scallop or recessed feature
Solution Approach 1:
The restraint hook incorporates a scallop or recessed feature at a specific location along its length to create a localized engagement geometry that accommodates modified RIG bar shapes. This local modification allows the hook to adapt to complex geometries without requiring complete redesign of the entire hook structure, thereby improving adaptability while minimizing the increase in overall device complexity.
2Reliability
If the restraint hook reaches a raised position for secure engagement, then the reliability of vehicle restraint is improved, but the risk of premature contact with the RIG bar increases which can prevent proper engagement
Solution Approach 1:
The scallop or recessed feature in the restraint hook is designed to control the sequence of contact during engagement. By creating a specific geometry that allows the hook to reach its raised position without premature contact, the system performs the necessary positioning action in advance, ensuring proper engagement geometry is achieved before the hook contacts the RIG bar, thereby improving reliability while preventing premature contact issues.
Data Source
AI summary
Provided herein are vehicle restraint systems for releasably securing a vehicle having a RIG bar to a loading dock. The vehicle restraint systems can include a vehicle engagement member, such as a restraint hook, that is configured to engage RIG bars having a variety of geometries, including conventional RIG bars having a square cross-sectional area and modified RIG bars having more complex geometries. The engagement member can include an engagement region having a scallop feature configured to provide clearance for the RIG bars during engagement.