Dual Leaf Door Synchronization via Hidden Driver Mechanism
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Solution Overview
Problem
Existing double-leaf door systems with external entrainment flaps suffer from aesthetic impairment and wear issues, as well as requiring additional structural modifications for carrier flaps, which complicates the opening and closing sequences.
Innovation Solution
A driver device is integrated within the frames of the double-leaf door, comprising a driver and rail system that is hidden when closed, using tubular frame profiles and a mandrel mechanism to ensure synchronized opening of both leaves without visible wear, with a return spring for decoupling and a control element for independent operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external entrainment flaps are used on the active leaf, then the active leaf can be opened together with the passive leaf, but the aesthetic appearance is impaired and visible wear is formed
Solution Approach 1:
The entrainment mechanism is extracted from the visible surface of the active leaf and relocated to the frame structure. The driver device is integrated into the frame of the passive leaf, and the rail is integrated into the frame of the active leaf, so that no components are visible on the outer surfaces when the door is closed, thus preserving aesthetic appearance while maintaining the synchronized opening function.
Solution Approach 2:
The driver and rail components are nested within the frame structures. The driver is received within the frame of the passive leaf and can be displaced outward when needed, while the rail is received within the frame of the active leaf. This nesting allows the mechanism to be hidden when not in use, preserving the aesthetic appearance of the door surfaces.
2Ease of operation
If carrier flaps are attached to the fixed leaf, then the active leaf can be pushed open in a defined manner, but additional structural modifications are required and wear is produced on the fixed leaf
Solution Approach 1:
The frame structure serves multiple functions: it provides structural support for the door leaf and simultaneously houses the driver device that controls the opening sequence. The tubular frame profile is designed to accommodate the driver mechanism, eliminating the need for separate carrier flaps and reducing wear on the fixed leaf surface.
3Shape
If the driver device is integrated into the frame, then no visible wear is produced on the leaf surfaces, but the mechanism becomes more complex
Solution Approach 1:
The driver device is merged with the frame structure of the passive leaf, and the rail is merged with the frame structure of the active leaf. This integration eliminates separate components that would require attachment to the leaf surfaces, thereby preventing visible wear while managing complexity through unified design.
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 solution provides a seamless and aesthetically pleasing synchronization of door leaves without visible wear or additional structural requirements, ensuring efficient and reliable opening and closing sequences while maintaining the active and passive leaf independence.
Implementation Method 1
a return spring acts on the rail, which brings it back into the active leaf frame
Data Source
Figure 1
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AI summary
The door has an inactive leaf (12) by which a locking bar (16) in the ceiling or the floor is locked. A fixed leaf (14) is engaged with the inactive leaf. The fixed leaf and inactive leaf are coupled by a driving device. The driving device is provided with a driver (20) that is fixed with a leaf frame (24) which is displaced by a locking rod. The fixed leaf is connected with driver that is coupled with a rail (22), when the leaf frame (26) is retracted. An independent claim is included for entraining device.