Barrier-Free Sliding Door Leaf Transverse Movement Mechanism
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Solution Overview
Problem
Existing low-barrier sliding doors face challenges in transferring heavy leaf loads due to multiple glazing and increasing size, making transverse adjustment complex and barrier-free sealing difficult.
Innovation Solution
A door design featuring a sill with recesses on the upper side, a leaf that can be displaced parallel to the running rail, and a carriage with a roller part and control cam, allowing for transverse movement of the leaf and effective sealing without barriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the leaf is made larger and heavier due to multiple glazing, then the sealing capability is improved, but the transverse movement becomes structurally complex
Solution Approach 1:
The control cam acts as an intermediary element that converts the longitudinal movement of the driving bar into transverse movement of the roller part. This mechanical intermediary allows the heavy leaf to be moved transversely without requiring complex direct actuation mechanisms, resolving the contradiction between sealing capability and movement structure complexity
Solution Approach 2:
The patent replaces complex mechanical transverse adjustment mechanisms with a simpler cam-based control system. The control cam profile is designed to guide the roller part through the required transverse path, substituting complex multi-component mechanical systems with a single cam element that achieves the same function more efficiently
2Reliability
If stops are provided for the leaf in the region of the sill, then the sealing is improved, but the barrier-free property is reduced
Solution Approach 1:
Instead of providing stops in the horizontal plane (which would create barriers), the patent uses the vertical dimension by allowing the leaf to extend below the sill level. The leaf recess and corresponding protrusions create sealing in the vertical plane, eliminating horizontal stops while maintaining sealing capability and preserving barrier-free access
Solution Approach 2:
Rather than creating stops that prevent movement (traditional approach), the patent inverts the approach by allowing the leaf to move freely horizontally while using vertical engagement (leaf extending below sill) to provide sealing. This inversion transforms the sealing mechanism from horizontal constraints to vertical engagement, eliminating barriers
3Ease of operation
If the upper side of the sill is made flat, then the barrier-free property is improved, but the sealing capability deteriorates
Solution Approach 1:
The patent resolves this contradiction by moving the sealing function to the vertical dimension. The leaf extends below the sill level, creating engagement in the vertical plane rather than relying on horizontal flat surfaces. This allows the upper sill surface to remain flat and barrier-free while maintaining effective sealing through vertical leaf-sill engagement
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 door achieves simple design, reliable sealing, and barrier-free functionality, even with heavy leaf loads, by allowing the leaf to extend below the sill and using recesses and projections for smooth operation and load transfer.
Implementation Method 1
The carriage (18) comprises a roller part (22) with a running roller (68a, b) rolling on the running rail (16)
Implementation Method 2
a control cam (64) running at least in sections at an angle to the main plane (28) of the leaf, wherein the roller part (22) is designed to be movable transversely to the main plane (28) of the leaf
Data Source
AI summary
A door including a barrier-free sill is disclosed. The sill preferably has recesses on its upper side, the width of the recesses being less than 50 mm and/or the depth of the recesses being less than 3 mm. A leaf can penetrate the upper side in a leaf recess. The leaf may fall below the vertically uppermost dimension of a running rail. Using at least one projection of a carriage that extends into a guide groove, it is possible to reliably seal or transversely support the leaf in the event of wind pressure or a break-in attempt. The projection preferably extends further down than a running roller of the carriage. This enables the design of a particularly stable and yet barrier-free door.