Corner Fitting Clamping Force via Nested Engagement Area
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Solution Overview
Problem
Existing corner fittings for glass doors struggle to provide sufficient clamping force to securely hold heavier door elements without increasing the size of the fitting, which can lead to thread tearing when high tightening torque is applied.
Innovation Solution
The corner fitting features a first and second attaching means with an engagement area that extends beyond the construction depth of the fitting elements, allowing for increased tightening torque and clamping force without altering the fitting's dimensions, using a profiled exterior contour and multi-edged surface to enhance stability and torque application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the dimensions of the fitting are increased to provide larger locating surfaces, then the clamping force is improved, but the size of the fitting increases
Solution Approach 1:
The engagement area extends in the longitudinal direction between the fitting elements, utilizing the space between them rather than increasing the transverse dimensions of the fitting. This allows the second attaching means to act over a longer engagement area without increasing the overall fitting size, thereby increasing clamping force while maintaining compact dimensions.
Solution Approach 2:
The engagement area is nested within the space between the fitting elements, with the second attaching means extending into this intermediate space. This nesting approach allows the attaching means to achieve longer engagement length without increasing the external dimensions of the fitting structure.
2Force
If the tightening torque is increased to hold heavier door elements, then the clamping force is improved, but the thread tears out of the fitting elements
Solution Approach 1:
The engagement area extends longitudinally between the fitting elements, providing a longer thread engagement path. This extended engagement area distributes the tightening torque over a longer distance, reducing the stress concentration on any single point of the thread and preventing thread tearing while maintaining high clamping force capability.
3Force
If the construction depth of the fitting is increased to accommodate higher clamping forces, then the clamping force is improved, but the structural depth increases considerably
Solution Approach 1:
Instead of increasing the construction depth (height) of the fitting, the solution extends the engagement area in the longitudinal dimension between the fitting elements. This dimensional shift allows the clamping force to be increased without adding to the structural depth, maintaining a compact profile while achieving higher load capacity.
Data Source
AI summary
A corner fitting for a door element to be disposed on a center of rotation or an axis, including first and second fitting elements, which, at least sectionwise, each include a locating portion for the abutment against the door element, and are interconnectable while restraining the door element in a restraining area. The fitting elements delimit the restraining area, including at least one attaching unit for reliably clamping the door element between the fitting elements. The attaching unit includes first attaching means, disposed at the first fitting element and/or at the second fitting element, and second attaching means, disposed at the second fitting element and/or at the first fitting element. The attaching means are non-positively and/or positively interconnected.The first attaching means includes an engagement area, into which the second attaching means acts, wherein the engagement area extends at least partially into the restraining area via the locating.