Cantilever Cupboard Wall Support with Pin-Dowel Load Distribution
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Solution Overview
Problem
Existing supports for cantilever furniture are prone to yielding and falling due to severe combined shear and tensile stress from the weight of cupboard contents, which are not adequately resisted by conventional fixing means.
Innovation Solution
A support system utilizing a combination of dowels and pins, with expansion screws, positioned strategically on a metal plaque to resist vertical and horizontal forces, ensuring effective resistance to shear and tensile stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fixing means (single dowel) are used, then the device complexity is low, but the resistance to combined shear and tensile stress is insufficient
Solution Approach 1:
The fixing system is segmented into two distinct components: a dowel for resisting shear stress and a pin for resisting tensile stress. This segmentation allows each component to be optimized for its specific function, with the dowel positioned to handle vertical loads and the pin positioned to handle horizontal loads, thereby resolving the contradiction between strength and complexity by addressing each stress type separately rather than relying on a single complex fixing mechanism
Solution Approach 2:
The support plaque acts as an intermediary element that distributes and transfers the combined shear and tensile stresses from the cupboard to the two separate fixing points (dowel and pin) on the wall. This intermediary structure enables the effective combination of multiple fixing mechanisms working together to resist the composite stress state, solving the contradiction by introducing a mediating component that coordinates the action of multiple simple fixings
2Reliability
If the support is positioned to optimize stress distribution, then the reliability improves, but the ease of operation during installation decreases
Solution Approach 1:
The support plaque is designed with pre-drilled holes at the optimal positions for the dowel and pin, allowing installers to directly insert the fixing elements without requiring complex measurements or calculations. The holes are positioned in advance to ensure proper stress distribution, thereby maintaining reliability while significantly improving ease of operation by eliminating the need for precise现场 positioning during installation
Solution Approach 2:
The support plaque features localized reinforcement and strategically positioned holes at specific locations to optimize stress distribution. The plaque's geometry and hole positions are designed with local quality variations that concentrate structural strength where needed while maintaining overall simplicity, allowing reliable stress distribution without complicating the installation process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The support system significantly enhances the resistance to shear and tensile stress, preventing the failure of cantilever furniture by distributing the load more effectively across the fixing points, thereby ensuring the stability of the cupboard.
Implementation Method 1
The dowel is expanded by means of a screw passing through a hole of the plaque
Data Source
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AI summary
A support (30;30A;30B;30C;30D;30E) for the wall (P) assembly of a cantilever cupboard (M) comprises a plaque (31;31A;31B;31C;31D;31E) suitable for being fixed to said wall (P) by at least any fixing means (34;34A;34B,134B;34C;34D;34E,134E,234E), said plaque (31;31A;31B;31C;31D;31E) also having at least one raised section (32;32A;32B;32C;32D;32E) with respect to said wall (P) with at least one window (33;33A;33B;33C;33D;33E) for the connection of a hook (G) of a hanging bracket device (R) fixed to said cupboard (M). According to the invention, at least one pin (35;35A,135A;35B,135B;35C;35D;35E) integral with said plaque (31;31A;31B;31C;31D;31E) and suitable for being introduced into a hole (37) of said wall (P), cooperates with said at least one fixing means (34:34A;34B,134B;34C;34D;34E,134E,234E).