Rotating Fastening Plate for Insulation Thermal Bridging
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Solution Overview
Problem
Existing fastening systems for insulating materials face issues with inconsistent dowel length due to varying plaster thickness, leading to inadequate penetration of screws into the dowel expansion area and high heat transfer coefficients, especially when the polygonal head is fixed non-rotatably, which complicates installation and increases thermal bridging risks.
Innovation Solution
A fastening system featuring a rotatable holding plate with a telescopic mechanism allowing the polygonal screw head to move within a lifting channel, ensuring deep penetration into the dowel and adapted cross-sections for torque transmission, combined with co-rotation locks and a dowel design with axially extending webs for stability and heat insulation, and a sealing plug for corrosion protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the polygonal head is fixed non-rotatably in the contour-adapted recess, then the screw is securely positioned, but the heat transfer coefficient increases and installation becomes complicated
Solution Approach 1:
The patent applies the dynamics principle by making the polygonal head rotatable within the contour-adapted recess instead of being fixed non-rotatably. The holding plate can rotate along with the polygonal head, allowing the screw to telescope along a lifting channel. This dynamic mechanism enables the system to adapt during installation while maintaining secure positioning, and reduces heat transfer by allowing optimal positioning of the polygonal head relative to the insulating material surface.
2Adaptability or versatility
If the dowel length is non-predeterminable due to varying plaster thickness, then the system adapts to different substrates, but the screw cannot penetrate sufficiently deep into the dowel expansion area
Solution Approach 1:
The patent applies dynamics by enabling the holding plate and sleeve part to rotate together, which telescopes the screw along the lifting channel. This rotational movement allows the screw to achieve sufficient penetration depth into the dowel expansion area regardless of the varying plaster thickness, while maintaining adaptability to different substrate conditions.
Solution Approach 2:
The patent applies the nested doll principle through the telescopic mechanism where the screw can move within the lifting channel of the sleeve part, and the holding plate rotates within the sleeve part. This nested structure allows compact storage and flexible deployment to achieve the required penetration depth.
3Object-affected harmful factors
If a screw with a large plastic head is used by overmoulding, then heat transfer is reduced, but the manufacturing process becomes complicated and expensive
Solution Approach 1:
The patent applies segmentation by separating the screw head from the screw shaft, with the polygonal head being rotatable and the screw shaft being anchored in the dowel. This segmentation allows the polygonal head to be made of metal for strength while the holding plate provides the insulating function, avoiding the need for complex overmoulding processes while still reducing heat transfer.
Solution Approach 2:
The patent applies composite materials by combining metal components (screw, polygonal head) with plastic components (holding plate, sleeve part). This composite construction achieves both mechanical strength and thermal insulation properties without requiring overmoulding, simplifying the manufacturing process while maintaining low heat transfer characteristics.
4Length of moving object
If the polygonal head takes up too small a distance from the insulating material surface, then the assembly is compact, but the point-related heat transfer coefficient is insufficient
Solution Approach 1:
The patent applies dynamics by making the polygonal head rotatable rather than fixed, allowing it to be positioned at an optimal distance from the insulating material surface. The rotational movement enables the polygonal head to telescope along the lifting channel, providing flexibility in positioning to maintain both compactness and sufficient heat insulation.
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 system achieves a low heat transfer coefficient, enhanced load-bearing capacity, and stability, allowing for flush or countersunk installation with reduced dowel density, meeting safety and insulation standards, and accommodating various insulation thicknesses with modular flexibility.
Implementation Method 1
a fastening element that can be anchored in the supporting substrate with a dowel
Implementation Method 2
with the rotation of the holding plate, the polygonal head and thus the screw are mounted telescopically along a lifting channel within the through-bore downwards
Implementation Method 3
co-rotation locks and a dowel design with axially extending webs for stability
Implementation Method 4
a sealing plug for corrosion protection
Implementation Method 5
taking into account the insulation values... avoid cold or thermal bridges through the expansion element or at least to limit the heat transfer coefficient
Data Source
AI summary
The fastening system (1) has a sleeve part (2) with a plate-shaped holding plate (3) and a holding plate shaft (4), and a fastening element that is coupled in the supporting substrate. The head of a screw (7) is formed as polygonal head (11). A through hole (6) is arranged within the sleeve part and the holding plate and has a cross-section that is adapted at the polygonal head of the screw. The sleeve part is made of polypropylene, a plug (13) is made of polyamide and the screw is made of galvanized steel.