Cargo Roller Tray Shear Fitting Adjustable Fastening
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Solution Overview
Problem
The existing methods for attaching cargo roller trays to structural supports require drilling and alignment of holes, leading to re-work when predrilled components do not align, increasing the assembly time and complexity.
Innovation Solution
A shear tie system with a base plate and lugs, featuring slots and openings that allow for adjustable positioning, enabling the cargo roller tray to be securely fastened to a support without the need for precise hole alignment, using a base plate attached to the support and a lug attached to the tray, allowing for shifting along the support's length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If predrilled components are used to speed assembly, then assembly time is reduced, but re-work is required when holes do not align
Solution Approach 1:
The shear tie incorporates slots instead of fixed holes, allowing dynamic adjustment of the fastening position. The slot geometry enables the fastener to be positioned at different locations along the slot length, accommodating variations in predrilled hole positions without requiring re-drilling or re-work.
Solution Approach 2:
The invention changes the geometric parameter from a fixed hole to a slot with extended length. This parameter change allows the fastening location to vary within the slot boundaries, providing tolerance compensation for predrilled component alignment variations while maintaining assembly efficiency.
2Reliability
If traditional fastening with backing plates is used, then secure attachment is achieved, but assembly complexity increases
Solution Approach 1:
The invention extracts and eliminates the backing plate component from the fastening system. The shear tie design integrates the attachment function directly into the tie structure itself, using the slot and lug configuration to provide secure fastening without requiring separate backing plates, thereby reducing assembly complexity.
Solution Approach 2:
The shear tie combines multiple functions into a single integrated component. The base plate with slots and the lug with opening work together as one unified fastening element, eliminating the need for separate backing plates and simplifying the overall fastening system while maintaining secure attachment.
Data Source
AI summary
A cargo roller tray shear fitting that may be used to fasten a cargo roller tray to a floor beam. The shear fitting may include a back plate having at least one slot. A lug extends from the back plate and has a lug opening.