Window Sash Load Alleviation with Tension Display
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Solution Overview
Problem
Existing window and door sash load transfer devices require precise assembly and prestressing of spring arrangements, making it difficult to ensure correct preload and check if the correct tension is achieved, especially when parts are assembled imprecisely.
Innovation Solution
A relief arrangement with a clamping display to monitor and adjust the spring arrangement's pretension, featuring a tensioning mechanism with an adjusting screw and visual or acoustic indicators to ensure correct preload, allowing for easier assembly and alignment of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring arrangement is pre-tensioned during assembly, then the load transfer function is achieved, but the assembly process becomes complex and requires precise alignment
Solution Approach 1:
The patent applies preliminary action by providing a tensioning mechanism that enables the spring arrangement to be pre-tensioned before final assembly. The stationary abutment part includes a tensioning mechanism with an adjusting screw that can compress the spring arrangement against the movable abutment part, establishing the correct preload state before the load transfer element is fully installed. This ensures the load transfer function is already active when needed.
Solution Approach 2:
The patent uses an intermediary approach by introducing a display element that mediates between the spring arrangement's tension state and the assembler's knowledge. The display element provides visual feedback about the pretension status, allowing assemblers to verify correct installation without requiring expert judgment or complex measurement tools, thus simplifying the assembly process while ensuring reliability.
2Measurement precision
If precise assembly is required for correct spring pretension, then the load transfer is accurate, but the ease of assembly deteriorates
Solution Approach 1:
The patent implements feedback by providing a display element that visually indicates the pretension state of the spring arrangement. The display element is positioned to be visible through a viewing opening, allowing assemblers to continuously monitor whether the spring arrangement has been correctly pre-tensioned. This feedback mechanism eliminates the need for precise manual measurement and verification, making the assembly process easier while maintaining accuracy.
Solution Approach 2:
The patent applies self-service by designing the tensioning mechanism and display system to automatically indicate when correct pretension is achieved. The adjusting screw mechanism, when operated, automatically compresses the spring arrangement to the correct degree, and the display element automatically shows when the proper tension is reached. This eliminates the need for external measurement tools or expert intervention, allowing any assembler to achieve correct pretension through simple operation.
3Ease of operation
If the spring arrangement is tensioned after assembly, then assembly is simplified, but verification of correct preload becomes difficult
Solution Approach 1:
The patent resolves this contradiction by providing a display element that gives real-time visual feedback about the spring arrangement's tension state. Whether the spring is tensioned before or after assembly, the display element continuously monitors and visually indicates the pretension level through the viewing opening. This allows assemblers to simplify the assembly process while simultaneously having easy verification of correct preload through the visual display.
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 correct prestressing of the spring arrangement to be set and checked, even with imprecise assembly, simplifying the assembly process by allowing the spring arrangement to be tensioned later, reducing the need for precise alignment of the load transfer element during assembly.
Implementation Method 1
a spring arrangement which always brings about a vertically acting spring force component which is directed against a vertical weight force component
Implementation Method 2
a spring arrangement which always brings about a vertically acting spring force component which is directed against a vertical weight force component
Data Source
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AI summary
In a relief arrangement with which at least part of the sash load of a sash (45) of a window, a door or the like can be transferred to a fixed frame (47), with a frame-side and a sash-side abutment (11, 46) and a load transfer element (20) arranged between the abutments (11, 46), wherein at least one of the abutments (11) has a stationary abutment part (12) and an abutment part (13) movable relative to the stationary abutment part (12) and a spring arrangement (21) is arranged between the abutment parts (12, 13), a tension indicator is provided to indicate the tension state of the spring arrangement (21).