Roller Shutter Guiding Device for Polygon Effect
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Solution Overview
Problem
High-speed roller shutters with rigid shutter elements experience a polygon effect, leading to shaking, noise, and potential damage due to the mismatch between the coiling device and side rails, limiting speed and lifespan.
Innovation Solution
A separate guiding device is introduced between the side rails and coiling device, adjusting to the changing diameter of the coiling device to maintain continuous guidance and prevent the polygon effect, allowing for increased speed and use of taller, thicker rigid shutter elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the opening and/or closing speed is increased, then productivity is improved, but the polygon effect increases causing shaking, noise and potential damage
Solution Approach 1:
A separate guiding device is introduced as an intermediary between the side rails and the coiling device. This guiding device specifically guides the door leaf in the area between the side rails and the coiling device, preventing the polygon effect while allowing high-speed operation without shaking or noise
Solution Approach 2:
The guiding device is designed to be adjustable to accommodate the changing diameter of the coiling device as the door leaf is rolled up or unrolled. This dynamic adjustment capability ensures continuous effective guidance throughout the entire rolling process, maintaining reliability at high speeds
2Temperature
If the height and/or thickness of rigid shutter elements is increased, then thermal insulation is improved, but the polygon effect increases causing shaking and noise
Solution Approach 1:
The guiding device acts as an intermediary that specifically addresses the polygon effect caused by rigid shutter elements. It provides dedicated guidance in the critical area between side rails and coiling device, enabling the use of tall, thick rigid elements for thermal insulation without generating shaking or noise
Solution Approach 2:
The adjustable guiding device adapts to the changing geometry during rolling, ensuring that rigid shutter elements with increased height and thickness are properly guided throughout the entire process, preventing polygon effect while maintaining thermal insulation performance
3Object-generated harmful factors
If the height of lamellae is reduced, then the polygon effect is reduced, but thermal insulation performance deteriorates
Solution Approach 1:
The guiding device serves as a mediator that allows the use of tall rigid shutter elements by providing specialized guidance. This intermediary structure prevents the polygon effect that would normally occur with high lamellae, enabling both reduced polygon effect and maintained thermal insulation
Solution Approach 2:
The dynamically adjustable guiding device ensures that tall lamellae are properly guided throughout the rolling process, preventing polygon effect while allowing the use of increased lamellae height for thermal insulation without requiring height reduction
4Reliability
If a separate guiding device is added, then the polygon effect is prevented, but device complexity increases
Solution Approach 1:
The guiding device incorporates dynamic adjustment capability to adapt to changing coiling device diameter. This single adjustable component provides continuous effective guidance throughout the rolling process, preventing polygon effect without requiring multiple complex static components
Solution Approach 2:
The guiding device serves multiple functions: it guides the door leaf between side rails and coiling device, accommodates changing coiling diameter, and prevents polygon effect. This multi-functionality in a single adjustable component reduces overall system complexity while achieving reliable polygon effect prevention
Data Source
AI summary
The invention relates to a roller shutter (10, 32, 42, 51) for opening and closing a doorway having a door leaf (11) and side rails (17) for guiding the door leaf (11), and having a coiling device (14) for selectively rolling up the door leaf (11) for opening the doorway and unrolling the door leaf (11) for closing the doorway. For reducing or avoiding the risk of creating a polygon effect and for providing a roller shutter (10, 32, 42, 51) comprising a door leaf having rigid shutter elements with an increased height and/or with the possibility of applying an increased speed for opening and/or closing the door leaf the roller shutter (10, 32, 42, 51) is characterized in that a separate guiding device (21, 33, 43) is provided for guiding the door leaf (11) in the area between the side rail (17) and the coiling device (14), wherein the guiding device (21, 33, 43) is arranged to adjust to an increasing diameter and to a decreasing diameter of the coiling device (14).