Canvas Frame with Segmented Corner Slats and Crossbars
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Solution Overview
Problem
Traditional canvas framing methods are cumbersome for assembly, disassembly, storage, and transport, especially for large formats, and the frame remains visible when hung, lacking a tool-free disassembly method.
Innovation Solution
A canvas frame design featuring machined wooden or composite uprights with diagonal cuts, corner grooves, and corner slats that allow for tool-free assembly and disassembly by folding corner tabs and using oversized crosspieces to tension the canvas, masking the support when hung.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional canvas framing methods are used with pre-assembled frames and staples, then the canvas is securely fixed, but the assembly and disassembly processes become cumbersome and require tools
Solution Approach 1:
The frame is divided into separate components (uprights, crosspieces, corner pieces) that can be easily assembled and disassembled without tools. The corner pieces act as modular connectors that join the uprights and crosspieces through simple insertion and locking mechanisms, enabling tool-free assembly and disassembly while maintaining structural integrity.
Solution Approach 2:
Corner pieces serve as intermediary elements that facilitate the connection between uprights and crosspieces. These corner pieces include integrated locking mechanisms and recesses that receive the canvas corners, acting as mediators that simplify the attachment process and eliminate the need for staples or specialized tools.
2Ease of operation
If the frame structure is made visible to support the canvas, then the canvas is securely mounted, but the aesthetic appearance is compromised when hung on the wall
Solution Approach 1:
The canvas is nested within the frame structure in such a way that the frame serves as a concealed support. The corner pieces and crosspieces are positioned to hold the canvas from behind, allowing the artwork to be displayed without the structural elements being visible from the front, thus maintaining aesthetic appearance while providing secure mounting.
3Reliability
If the frame is designed for secure mounting and storage, then the canvas is protected, but mobility and transport become difficult especially for large formats
Solution Approach 1:
The segmented frame design allows the structure to be easily disassembled into smaller components for transport. The corner pieces and crosspieces can be separated from the uprights, reducing the overall size and making it easier to move large-format canvases. The modular nature maintains security during assembly while improving mobility during transport.
4Stability of the object's composition
If traditional assembly methods with mortises and tenons are used, then the frame structure is stable, but the assembly process requires precise machining and tools
Solution Approach 1:
The frame is segmented into standardized components with simplified connection points. The corner pieces include pre-formed recesses and locking features that receive uprights and crosspieces without requiring precise mortise and tenon joints. This segmentation maintains structural stability while dramatically simplifying the assembly process and reducing machining requirements.
Data Source
Figure 1~2
Figure 3~4
AI summary
The stretched canvas frame for painting or printed canvas comprises a pre-cut canvas (4A) and a frame with four profiled uprights (4B), each with a mortise. The frame also includes four corner slats and at least two flexible crossbars adapted to fit into the mortises. The uprights (4B), which have a mitered cut and a corner groove at each end, include projecting elements (4C) to allow the canvas (4A) to be hung by wrapping around the outer perimeter of the frame. Holes are formed along the edges and in corner tabs provided at each corner of the canvas to cooperate with the projecting elements (4C). Disassembly is permitted. Hanging the canvas (4A) on the uprights (4B) can be accomplished in a sequence of manual actions without tools, while ensuring effective tensioning through the combined action of the corner slats and crossbars.