RV Slide-Out Flange Corner Piece with Extrusion Receiving Pockets
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Solution Overview
Problem
The existing trim flange system for slide-out rooms in RVs requires precise measurement and attachment, leading to potential leaks and aesthetic issues due to mitered corners and the need for external fasteners, which complicates manufacturing under time pressure.
Innovation Solution
A flange system with corner pieces that receive extrusions, allowing for squared cuts with a wide tolerance band and eliminating the need for external fasteners, using channels at 90 degrees to align and secure the extrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If mitered corners are used on the extrusion, then the aesthetic appearance is improved, but the manufacturing precision and time requirements increase significantly
Solution Approach 1:
The corner treatment is segmented into two separate components: the main extrusion body and the decorative trim piece. This allows the extrusion to be cut with simple square ends using standard equipment, while the aesthetic corner appearance is achieved through separate L-shaped trim pieces that are attached to the corners. This segmentation eliminates the need for complex mitering operations on the main extrusion.
Solution Approach 2:
The decorative trim piece serves as an intermediary element that bridges the gap between the functional extrusion (which needs simple square cuts) and the aesthetic requirement (which needs finished corner appearances). The trim piece is attached to the corner of the extrusion using screws, providing both the visual finish and structural completion without requiring precise mitering of the main extrusion.
2Strength
If external fasteners are used to attach trim pieces, then the attachment strength is improved, but the device complexity and risk of seal damage increase
Solution Approach 1:
The fastening function is merged with the decorative trim piece itself. The trim piece is designed to be attached to the extrusion corner, and the same attachment mechanism (screws) that secures the trim also provides the structural reinforcement needed. This eliminates the need for separate external fasteners that would require additional drilling and tapping operations, reducing complexity while maintaining attachment strength.
3Manufacturing precision
If precise measurement and attachment are used for mitered corners, then the fitment quality is improved, but the manufacturing time and skill requirements increase
Solution Approach 1:
Instead of trying to achieve precise corner fitment through complex mitering of the main extrusion, the approach is inverted: the main extrusion is cut with simple square ends using standard equipment, and the precise corner appearance is achieved by attaching pre-fabricated L-shaped trim pieces. This inversion of the problem-solving approach eliminates the need for high-precision mitering operations while maintaining aesthetic quality.
Data Source
AI summary
A flange corner piece is provided that is used to provide decoration and sealing to the perimeter of a slide-out room. The slide-out room has an outside wall with a perimeter edge. Elongate extrusions are attached to the perimeter. The extrusions have terminal ends that are located proximate corners on the outside wall. Terminal ends of the extrusions are received by first and second receiving pockets in the flange corner piece. The receiving pockets are made up of walls that overlay portions of the extrusions and constrain it. The first and second receiving pockets affix neighboring extrusions and conceal the corners of the slide-out room.