Thermal Insulating Fastener Resolves Strength-Insulation Trade-off
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Solution Overview
Problem
Thermal insulation composite systems have a low mechanical load-bearing capacity, making it difficult to attach add-on parts to building walls or roofs without damaging the insulation layer.
Innovation Solution
A fastening device with a base body made of non-thermally conductive material, featuring a receiving space, a distribution element, and rod-shaped elements that allow for force transmission through the insulation layer without creating a cold bridge, along with tension elements and a closing plate for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fastening methods are used to attach components to building walls or roofs, then mechanical strength and attachment capability are improved, but the insulation layer is damaged or compromised
Solution Approach 1:
The patent introduces a base body as an intermediary element that bridges the gap between the insulation layer and the component to be attached. This base body is designed to be mechanically strong enough to support attachment while being thermally insulating to maintain the thermal performance of the wall structure, thus resolving the contradiction between mechanical strength and insulation integrity
Solution Approach 2:
The fastening device employs composite construction combining different materials with complementary properties. The base body uses thermally insulating materials (such as expanded polystyrene, mineral wool, or ceramic) to maintain thermal performance, while metal reinforcement elements provide the necessary mechanical strength for attachment, creating a composite structure that satisfies both requirements
2Temperature
If thicker insulation layers are used to maintain thermal performance, then thermal insulation is improved, but mechanical load-bearing capacity decreases
Solution Approach 1:
The patent segments the fastening function from the insulation layer by introducing a separate base body that provides mechanical strength. This allows the insulation layer to maintain its optimal thickness for thermal performance while the base body independently provides the necessary mechanical support for attachments, decoupling the two functions
Solution Approach 2:
The base body is designed with non-uniform structure featuring a bearing surface area that is at least twice as large as the contact area with the component. This local quality distribution concentrates mechanical loads onto a larger portion of the base body, maintaining insulation integrity while providing sufficient mechanical strength for attachment
3Adaptability or versatility
If attachment components are added to building structures, then functionality is improved, but thermal bridges are created reducing energy efficiency
Solution Approach 1:
The base body serves as a thermal intermediary that breaks the thermal bridge path between the component and the building structure. By using thermally insulating materials in the base body, thermal energy flow is interrupted, preventing energy loss while still providing the necessary mechanical attachment capability
Solution Approach 2:
The patent extracts the thermal bridge effect by separating the attachment function from the thermal path. The base body is designed to minimize thermal conductivity, effectively removing the thermal bridge that would otherwise be created by direct mechanical attachments through the insulation layer
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
Enables the attachment of add-on parts to building structures without damaging insulation, providing a statically load-bearing connection, maintaining insulation integrity, and maintaining load-bearing capacity during fires, with adaptable thickness to suit various insulation layers.
Implementation Method 1
a base body (4) made of a non-thermally conductive material
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a fastening device comprising: a base body in the first end region of which an outwardly open receiving space extending into the interior of the base body is provided; a distribution element inserted into the receiving space, which forms an inner closing surface of the receiving space and is in contact with a bearing surface of the base body; a recess provided in a second end region of the base body opposite the first end region, which extends from the outside of the base body into the receiving space; a rod-shaped element guided through the recess and through the distribution element, connected to the distribution element, one end region of which projects outwards beyond the outside of the base body and the other end region of which extends into the receiving space; and a closing plate attached to the first end region of the base body, which closes the receiving space outwards.which contains one or more connecting elements for accommodating external components.