Facade Clamping Strip with Internal Retaining Pin
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Solution Overview
Problem
Existing attachment assemblies for outside wall cladding elements are vulnerable to burglary as they can be easily forced open or the screws unscrewed, allowing unauthorized access.
Innovation Solution
Incorporating a retaining pin that is secured from the inside and made with hardened materials or designs that prevent tool engagement, combined with a U-shaped profile and hardened strips to enhance security, ensuring the assembly remains intact even after the screw is removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a screw and profile are used to clamp the clamping strip and support profile together, then the assembly can be easily installed and disassembled, but it becomes vulnerable to burglary as the screw can be removed or the profile can be removed with a grinding machine
Solution Approach 1:
The fastening system is divided into two independent parts: a screw for initial assembly and disassembly, and a retaining pin that remains in place after screw removal. The retaining pin is secured from the inside of the support profile, creating separate functions for installation (screw) and security (retaining pin), thus resolving the contradiction between ease of operation and burglar-proof security.
Solution Approach 2:
The retaining pin acts as an intermediary element that provides continuous security even after the screw is removed. It mediates between the need for easy disassembly (screw removal) and the need for ongoing security (retaining pin remains in place), ensuring the assembly cannot be easily forced open without damaging the hardened head.
2Ease of operation
If the head of the retaining pin is made accessible from the outside, then the retaining pin can be removed or engaged using tools, but this reduces the burglar-proof security of the assembly
Solution Approach 1:
Instead of making the retaining pin head accessible from the outside for tool engagement, the invention inverts the arrangement by securing the retaining pin from the inside of the support profile. The head is positioned inside the support profile where it cannot be engaged by external tools, thus achieving burglar-proof security while still allowing the retaining pin to perform its function of preventing forced opening.
3Ease of manufacture
If the support profile has an open cross section to allow easy assembly, then the assembly process is simplified, but the structural integrity and security against forced opening is reduced
Solution Approach 1:
The retaining pin is inserted into the support profile before the final assembly step, and its head is secured from the inside during the assembly process. This preliminary positioning ensures that when the assembly is completed, the retaining pin is already in place to provide structural integrity and resistance to forced opening, while the support profile maintains its simple shape for easy manufacturing.
Data Source
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AI summary
An attachment assembly for an outside wall cladding element to an outside wall, wherein the outside wall cladding element, on at least one of its edges, ha a support profile arranged on the inner side thereof and a clamping strip arranged on the outer side thereof, wherein a fastening pin, such as a screw with a screw head and a threaded shank, engages the clamping strip and the support profile in order to clamp the outside wall cladding element between the clamping strip and the support profile, wherein the screw head is screwed against the clamping strip from the outer side, in such a way that the shank grips into the support profile.