Plasterboard Anchor Bracing for Heavy-Load Fixing Strength
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Solution Overview
Problem
Conventional fixing devices for plasterboard walls and ceilings, such as wall plugs, often fail to provide sufficient strength for heavier loads, leading to the device being pulled out of the wall and damage to the surrounding area, due to insufficient anchor strength and uneven strain distribution.
Innovation Solution
A fixing device with a resiliently flexible elongate bracing member and an external retention mechanism, featuring a concave inner surface and strategically aligned apertures, allows for secure anchoring by distributing load evenly across the plasterboard, using a retention cord or tape to maintain the bracing member in place, and incorporating gripping members to prevent rotation and ensure stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional wall plug is used, then the device is simple and easy to install, but it cannot support heavier loads and gets pulled out of the wall
Solution Approach 1:
The fixing device is divided into distinct functional components: a body for insertion into the wall, a bracing member with gripping elements for anchoring, and an expansion mechanism. This segmentation allows each component to perform its specific function optimally while maintaining overall simplicity of the device.
Solution Approach 2:
The bracing member incorporates resiliently flexible material that dynamically adapts to the wall cavity, and the gripping members can rotate or expand under load to increase anchoring strength. This dynamic behavior allows the device to transition from a simple insertion state to a strongly anchored state under load.
2Strength
If the wall cavity is shallow, then installation is easier, but the full length of the tube cannot be retained reducing anchor strength
Solution Approach 1:
The bracing member features gripping members concentrated at its distal end, providing localized anchoring strength at the critical rear wall surface. This local concentration of gripping elements maximizes anchor strength even when the total retained length is limited by shallow wall cavities.
Solution Approach 2:
The bracing member is made from resiliently flexible material that combines elasticity with structural integrity, allowing it to flex and conform to the wall cavity while maintaining sufficient retained length for adequate anchoring in shallow installations.
3Area of stationary object
If retaining arms are used to engage the rear of the plasterboard, then contact surface area is maximized, but the device complexity increases with multiple moving parts
Solution Approach 1:
The complex rotating shaft mechanism and screw drives are extracted and replaced with a simplified bracing member that directly engages the rear wall surface through gripping members. This extraction eliminates multiple moving parts while maintaining effective rear surface engagement.
Solution Approach 2:
The bracing member with gripping members automatically engages and secures itself to the rear wall surface through resilient flexion and gripping action, eliminating the need for manually operated retaining arms or complex mechanical retention systems.
4Force
If the load is centered on the device, then the strain is concentrated, but this can cause the device to fail under heavy loads
Solution Approach 1:
The bracing member is positioned asymmetrically within the body, with its gripping members engaged at the rear wall surface away from the central load path. This asymmetric arrangement creates an offset that generates a counteracting moment to distribute strain more evenly and prevent concentrated loading.
Solution Approach 2:
The offset positioning of the bracing member creates a counterbalancing moment that acts as a mechanical counterweight to the centered load, distributing the strain across different parts of the device and preventing failure at any single point.
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 solution provides a robust anchor point capable of supporting heavier loads without being pulled out of the wall, distributing the load evenly and preventing mechanical failure, while allowing for use in shallower cavities and standard screw sizes without the need for specialized hardware.
Implementation Method 1
a resiliently flexible, elongate bracing member of length greater than an axial dimension of said body
Implementation Method 2
incorporating gripping members to prevent rotation and ensure stability
Data Source
Figure 1A
Figure 1B~2
Figure 3
AI summary
A fixing device for securing into a hole (30) in plasterboard and providing an anchor point for affixing a load to said plasterboard, the device comprising: - a body (12) configured to be retainable in said hole; and - a resiliently flexible, elongate bracing member (10) of length greater than an axial dimension of said body (12) and having an opening for receiving an external retention device (28, 128) for enabling manual retention of said bracing member (10) in a bracing position with an inner surface thereof against the rear of said plasterboard, in use, after insertion thereof through said hole (30).