Wall Anchor Insert Structure for Load Strength and Thermal Isolation
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Solution Overview
Problem
Existing anchoring methods for attaching objects to walls with thermal insulation layers are either expensive, prone to curvature under stress, or statically unfavorable, especially when used with modern vertical perforated bricks, which are weak against horizontal loads.
Innovation Solution
A steel insert part designed as a hollow profile with a central hollow chamber, where the threaded bolt extends only by the cross-sectional area dimension, and the remaining space is filled with a heat-insulating insert, providing improved static strength and reduced heat transfer, while being simpler and less expensive to produce.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a steel insert part with transverse ribs and multiple openings is used, then static load capacity is improved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The insert part is divided into functionally distinct zones: a first longitudinal region with transverse ribs for mechanical anchoring in masonry, and a second longitudinal region without ribs for clean adhesive bonding to the threaded rod. This segmentation allows each zone to optimize its specific function while using a simpler overall geometry that is easier to manufacture.
Solution Approach 2:
The insert part features local quality variations through the presence of transverse ribs only in the first longitudinal region, while the second longitudinal region remains smooth. This local differentiation provides mechanical interlocking where needed (in masonry) while maintaining a smooth surface for adhesive bonding, eliminating the need for complex features throughout the entire insert.
2Ease of manufacture
If a threaded rod protruding 20 cm into masonry with a glued wood block is used, then material cost is reduced, but static performance deteriorates due to unfavorable leverage effects on perforated bricks
Solution Approach 1:
The invention extracts and eliminates the wood block intermediary component from the anchoring system. Instead, a steel insert part is directly bonded to the threaded rod via adhesive, creating a more efficient load transfer path that avoids the leverage effects and static disadvantages associated with the protruding threaded rod and wood block assembly.
Solution Approach 2:
The anchoring system uses a composite construction combining steel insert part, adhesive bonding material, and threaded rod. This composite approach creates a unified load-bearing assembly where the adhesive acts as a bonding matrix between the steel components, providing superior static performance compared to the traditional wood block assembly while remaining cost-effective.
3Strength
If a steel insert part with large cross-sectional dimensions is used, then static strength is improved, but heat exchange with the wall increases
Solution Approach 1:
The insert part's cross-sectional dimensions are optimized to provide sufficient static strength while minimizing thermal bridge effects. The dimensional parameters are carefully selected to achieve the necessary mechanical performance with reduced material volume, thereby decreasing heat conduction between the interior and exterior through the wall assembly.
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 achieves a high static load capacity with reduced heat exchange and material usage, allowing for a permissible weight load that is significantly higher than traditional methods, while being easier and cheaper to manufacture and assemble.
Implementation Method 1
the insert part extends through the thermal insulation layer into a bore in the solid masonry and is bonded to the solid masonry in the bore
Implementation Method 2
the remaining space is filled with a heat-insulating insert, providing improved static strength and reduced heat transfer
Data Source
Figure 1
AI summary
The invention relates to an anchoring device (4) for fastening an object (13) to a wall (1) consisting of solid masonry (2) and an external thermal insulation layer (3). The anchoring device (4) comprises a threaded bolt (8) and an elongated steel insert (6) rigidly connected thereto, the insert having a longitudinally extending central hollow chamber. The insert (6) is, as intended, inserted into a blind hole in the wall (1) and bonded therein, and the threaded bolt (8) projects beyond the wall (1). The threaded bolt (8) extends into the insert (6) only by a maximum amount equal to the smaller cross-sectional area (15) of the insert (6). A thermal insulation insert (7) is located in the central hollow chamber of the insert (6).