Asymmetric Roller Shutter End Plate for Clear Height and Auto-Stop
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Solution Overview
Problem
Conventional roller shutter end plates compromise between the clear height of the door opening and the rigidity of the door curtain, and require manual calibration of the upper end position, which is time-consuming and costly.
Innovation Solution
The end plate is designed with a first end profile on one side of the door curtain facing the winding shaft, shorter than the second end profile on the opposite side, to maximize clear height and rigidity, with the second end profile acting as a stop for automatic upper end position determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the end plate is designed with a relatively flat metal profile to give the door curtain rigidity, then the rigidity of the door curtain is improved, but the clear height of the door opening is reduced
Solution Approach 1:
The end plate is divided into two separate end profiles (first end profile and second end profile) that are attached to opposite sides of the door curtain. This segmentation allows each profile to be optimized independently - the first end profile can be shorter to maximize clear height while the second end profile can be longer to provide sufficient rigidity and deadweight
Solution Approach 2:
The first end profile and second end profile are designed with different lengths, creating an asymmetric configuration. The first end profile has a shorter height to minimize obstruction of the door opening, while the second end profile has a longer height to provide adequate rigidity and deadweight for the door curtain
2Stability of the object's composition
If the end plate extends into the vertical guides to ensure the door curtain remains taut, then the tautness of the door curtain is improved, but the clear height of the door opening is further reduced
Solution Approach 1:
The end plate design applies local quality by having different profile heights at different locations. The first end profile is kept short where it would obstruct the door opening, while the second end profile is extended to provide the necessary tautness and stability. This localized differentiation optimizes both clear height and door curtain stability
3Measurement precision
If manual calibration of the upper end position is performed to ensure proper operation, then the operational precision is improved, but the time and cost required for installation and maintenance increase
Solution Approach 1:
The second end profile serves a dual function: it provides structural support for the door curtain and automatically determines the upper end position of the winding shaft. When the door curtain is fully wound, the second end profile contacts a reference surface, automatically establishing the correct upper end position without requiring manual calibration or intervention
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
This design maximizes usable door opening height while ensuring sufficient rigidity and eliminates the need for manual calibration, enhancing operational efficiency and safety.
Implementation Method 1
the second end profile acting as a stop for automatic upper end position determination
Implementation Method 2
Due to its own weight, the end plate also ensures that the door curtain is taut between the winding shaft and the end plate
Data Source
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AI summary
The invention relates to an end plate (12) for attaching to a leading edge of a door hanging (16) which is arranged on a winding shaft (14), comprising a first end profile (18), which is arranged on a first face of the door hanging (16) and has a lower end edge, a second end profile (20), which is arranged on a second face of the door hanging (16) and has a lower end edge and an upper end edge (22), and to a roller shutter comprising such an end plate (12). In order to resolve the conflict of interest between a maximum clear height HI of the door opening and an inherent weight which is as high as possible and in order to satisfy the preconditions for automatically determining the upper end position, the first end profile (18) and the second end profile (20) have different heights.