Door Sash Profile with Non-Positive Screw Mounting
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Solution Overview
Problem
Existing door and window sash designs with all-glass wings face issues with secure and easy fitting due to high forces acting on glass panes during assembly, risk of pane breakage, and complex assembly processes with multiple parts.
Innovation Solution
A sash design featuring a swivel fitting with a screw connection that can be fixed non-positively to a support profile, allowing for adjustment along the profile's longitudinal axis, eliminating the need for additional clamping plates and ensuring secure assembly without accessible screws for dismantling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pane is clamped between the support profile and the fastening section of the swivel fitting, then the swivel fitting can be securely fixed to the pane, but strong forces act on the pane in the small fastening area which can cause the pane to break
Solution Approach 1:
The support profile is divided into two functional parts: a clamping section that contacts the pane and a receiving area that receives the fastening section. This segmentation allows the clamping force to be distributed over a larger area of the pane while the fastening section remains compact, reducing stress concentration on the glass.
Solution Approach 2:
The support profile acts as an intermediary element between the swivel fitting and the pane. Instead of directly clamping the pane with the fastening section, the support profile mediates the connection, distributing forces and protecting the pane from direct high-stress contact.
2Ease of operation
If the screw connection is made accessible from the front side for easy assembly, then assembly is simplified, but the screw connection becomes accessible for dismantling when the sash is closed
Solution Approach 1:
The support profile has different functional zones with different accessibility characteristics. The clamping section is accessible from the front for easy screw tightening, while the receiving area where the fastening section sits is positioned between the panes, making it inaccessible from the outside when the sash is closed, thus preventing dismantling.
3Reliability
If additional clamping plates and components are used to secure the swivel fitting, then the fixing reliability is improved, but the assembly complexity increases due to the large number of individual parts
Solution Approach 1:
The support profile combines multiple functions into a single integrated component: it provides structural support for the glass panes, creates the clamping section for securing the swivel fitting, and forms the receiving area for the fastening section. This eliminates the need for separate clamping plates and reduces the number of individual parts.
Solution Approach 2:
The support profile serves multiple purposes: it acts as a structural element holding the panes together, a mounting structure for the swivel fitting, and a force-distributing element. This multi-functionality reduces the overall number of components needed in the assembly.
Data Source
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AI summary
A leaf for a door or window with two separate parallel panels is disclosed. The panels are retained around the edge by a support profile forming a support frame essentially lying between the panels and connecting the same. The leaf is pivotably mounted on a fixed support construction by means of at least one hinge fitting. The hinge fitting comprises a fitting section which may be fixed in a housing region of the support profile. The fitting section of the hinge fitting passes through a recess in one of the panels which has an embodiment larger than the fixing section. The fixing section of the hinge fitting may be fixed to the support profile with a non-positive fit by means of a screw connection, whereby the screw connection may be made from a front face of the leaf.