Anchor Box With Ribbed Steel Halves For High Pull-Out Forces
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Solution Overview
Problem
Existing anchor boxes fail to securely anchor scaffolding and formwork panels in concrete structures, particularly under high pull-out forces without additional reinforcing iron, and often struggle with water ingress and complex installation processes.
Innovation Solution
An anchor box design featuring two steel shell halves connected via flanging or welding, with an unequally long insertion area and ribbed side walls to absorb pull-out forces, and a plug-in cover with a labyrinth seal for water protection, allowing secure anchoring and efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If plastic shell halves are used with welding connection, then manufacturing precision is improved, but strength is insufficient for high pull-out forces
Solution Approach 1:
The patent uses composite construction by combining plastic shell halves with steel reinforcement elements (flanges and connection pieces). The plastic provides sealing and corrosion resistance while the steel components provide the necessary tensile strength to withstand high pull-out forces of several tons, resolving the contradiction between manufacturing precision and strength.
2Ease of manufacture
If symmetric shell halves are used, then ease of manufacture is improved, but adaptability is reduced for different installation orientations
Solution Approach 1:
The patent employs asymmetric design in the connection pieces that extend from the shell halves. The connection pieces have different geometries and attachment configurations that allow adaptation to various installation orientations and structural requirements, while the basic symmetric shell halves maintain ease of manufacture. This resolves the contradiction by applying asymmetry only where needed for adaptability.
3Strength
If reinforcing iron is added to absorb pull-out forces, then strength is improved, but device complexity increases
Solution Approach 1:
The patent integrates the reinforcement function directly into the shell structure by incorporating flanges and connection pieces as integral parts of the anchoring system. The flanges extend from the shell halves and provide embedded surfaces that directly transfer pull-out forces to the concrete, eliminating the need for separate reinforcing iron elements and reducing overall device complexity while maintaining high strength.
4Object-affected harmful factors
If cover is added to close the anchoring box, then protection against water ingress is improved, but device complexity increases
Solution Approach 1:
The patent uses a flexible sealing mechanism where the cover incorporates sealing elements that conform to the anchoring box opening. The sealing is achieved through elastic deformation and pressure contact rather than rigid mechanical joints, providing effective water ingress protection while keeping the cover design simple and the overall device complexity low.
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 design enhances pull-out force absorption and production efficiency, ensuring secure anchoring without reinforcing iron and preventing concrete water ingress, while allowing easy installation and high extraction forces.
Implementation Method 1
The pull-out forces can be derived and taken over by ribs or humps from the side walls essentially over the entire height of the anchor box at a maximum distance from the surface of the partial structures
Implementation Method 2
A plug-in cover is shown in perspective from behind. A cover plate with a conical edge can be seen with reference number 35, which edge serves to be able to easily detach the insert cover from the wall after the insert cover has been concreted in a part of the building
Data Source
Figure 1~6
Figure 7
AI summary
The anchoring box (1) is constructed from two shell halves (13, 15) which are joined together. Preferably, the shell halves (13, 15) are made of a stamped and formed steel part or of a high-strength plastic.