Lifting-Sliding Door Wing Positioner Rain Tightness
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Solution Overview
Problem
Conventional lift and slide doors face issues with driving rain tightness, especially under high wind loads, due to the central area between carriages lacking sufficient support, allowing wind and rain to penetrate.
Innovation Solution
A separate wing positioner, designed as a U-shaped component, is placed between or next to carriages to fix the wing perpendicular to the glazing plane, providing additional support and sealing when the wing is lowered, and can be attached to the wing frame using screws, enhancing rigidity and strength by directing wind loads into the reinforcement profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional carriages with rollers are used to support the movable wing, then the door can be opened and closed horizontally, but the middle area between the carriages lacks sufficient support under high wind loads, allowing driving rain to penetrate
Solution Approach 1:
The support function is segmented by adding a separate wing positioner component between the two carriages. This third support element divides the previously unsupported middle area into additional support zones, ensuring that wind loads are distributed across three distinct support points rather than relying solely on the two carriage locations.
Solution Approach 2:
The wing positioner acts as an intermediary support element between the carriages and the running rail. It mediates the force transmission from the movable wing to the running rail in the middle area, providing additional stabilization and preventing the wing from deflecting under wind pressure, thereby eliminating the driving rain penetration issue.
2Area of stationary object
If the wing is made wider to improve visibility and aesthetics, then the door covers more area, but the middle area between carriages becomes more susceptible to wind load deflection
Solution Approach 1:
By introducing the wing positioner as a separate support element, the long span of wide wings is effectively segmented into shorter support intervals. This creates multiple smaller support zones that collectively stabilize the entire wide wing structure, preventing excessive deflection in the middle area while maintaining the aesthetic and functional benefits of the wide design.
Solution Approach 2:
The wing positioner provides localized reinforcement specifically in the middle area where wind loads cause deflection. Rather than requiring the entire wing structure to be reinforced uniformly, the local quality principle applies support precisely where needed - in the previously unsupported middle section - thereby stabilizing wide wings without compromising their overall design integrity.
3Device complexity
If only two carriages are used to support the movable wing, then the structure remains simple, but the central area lacks adequate guidance and support perpendicular to the glazing plane
Solution Approach 1:
The support system is segmented into three distinct functional zones: the two carriages at the ends and the wing positioner in the middle. This segmentation provides guidance and support at multiple locations along the wing's length, ensuring that the central area receives adequate perpendicular support while maintaining a relatively simple overall structure with modular components.
Data Source
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AI summary
The invention relates to a lifting-sliding door (1), which comprises at least one horizontally movable leaf (2) and a frame (4) with at least one slide rail, wherein means are provided, which when the movable leaf is lowered bring about a fixation of the movable wing in a direction perpendicular to the wing plane. These means are rigidly connected to the movable leaf. Leaf positioners (16, 16') are used as means for fixing the movable leaf, the positioners having a substantially U-shaped recess that is open in the direction of the slide rail, so that the leaf positioner surrounds the slide rail on both sides at least in partial regions when the movable leaf is in the lowered position.