Rubber Edge Fastening Profile for Roller Shutters
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Solution Overview
Problem
Existing roller door and shutter systems face issues with lateral sliding of lamellae during operation, leading to deformation, noise, and low speed, and require complex and costly assembly and maintenance due to multiple components.
Innovation Solution
A one-piece, flexible, and foldable U-form edge fastening profile made of rubber is mounted along the edges of lamellae to prevent lateral sliding, reduce friction, and facilitate easy assembly and disassembly, using guide recess and protrusion forms and mounting holes to ensure secure connection and smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If stoppers are used to connect lamellae on door shutter edges, then the shutter can be assembled, but it can only work at significantly low speed (below 1.2 m/s) and works very loudly
Solution Approach 1:
The patent uses a flexible rubber edge fastening profile instead of rigid stoppers. The rubber material allows the lamellae to move smoothly without rigid contact, enabling high-speed operation (above 1.2 m/s) while reducing noise and friction. The flexible profile accommodates movement while maintaining connection.
Solution Approach 2:
The invention changes the material parameter from rigid (stoppers) to flexible (rubber), and changes the connection method from point contact to surface contact along the edge. This parameter change allows the system to operate at higher speeds without generating excessive noise or friction.
2Ease of manufacture
If the coil method is used to connect lamellae individually, then the shutter can be assembled, but the production duration is very long and assembly/disassembly is difficult
Solution Approach 1:
The patent merges multiple individual connection points into a single continuous edge fastening profile that runs along the entire edge of the shutter. This eliminates the need to individually connect each lamella, significantly reducing assembly time and simplifying both assembly and disassembly processes.
Solution Approach 2:
The edge fastening profile serves multiple functions simultaneously: it connects all lamellae along the edge, provides lateral guidance, prevents deformation, and enables easy assembly/disassembly. This multi-functional design replaces the complex coil system with a single versatile component.
3Stability of the object's composition
If side rails are used to guide the door leaf, then lateral sliding is prevented, but the shutter mechanism becomes very complex and assembling/disassembling is significantly hard
Solution Approach 1:
The patent extracts the lateral guidance function from the complex side rail system and integrates it into the edge fastening profile itself. The guide recess and protrusion features are built into the rubber profile, eliminating the need for separate side rails while maintaining lateral stability.
Solution Approach 2:
The guidance mechanism is nested within the edge fastening profile structure. The guide recess in the rubber profile receives the guide protrusion, creating a compact integrated guidance system that prevents lateral sliding without requiring external side rails.
4Reliability
If lamellae are connected with multiple pieces and stoppers, then the shutter can be assembled, but maintenance and repair expenses increase and production period extends
Solution Approach 1:
The patent combines multiple separate connection components (stoppers, individual connectors) into a single integrated edge fastening profile. This reduces the number of parts that can fail, improving reliability while simultaneously reducing assembly time and production costs.
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 enables faster and quieter operation of roller door shutters at higher speeds, reduces maintenance costs, and allows for easy replacement of damaged components, while minimizing production time and labor expenses.
Implementation Method 1
to reduce tension and noise in the mechanism
Implementation Method 2
A one-piece, flexible and foldable edge fastening profile (3) made of a flexible material such as rubber
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to an edge fastening profile (3) for roller door shutter (1) having lamellae (2) that run vertically and that are opened and closed by winding onto a drum (4). The invention is characterized in comprising, a front sidewall (3.1) and back sidewall (3.2) that grip at least one edge of the mentioned lamellae (2) on two sides; at least one guide protrusion (3.3) provided on the body of one of the mentioned front sidewall (3.1) or back sidewall (3.2); at least one guide recess (3.4) that is provided on the body of the other one of the mentioned front sidewall (3.1) or back sidewall (3.2) and that prevents the edge fastening profile (3) from sliding laterally by housing the guide protrusion (3.3) when edge fastening profile (3) is wound onto the drum (4).