Sheet Material Arrangement With Pivotable Edge Member
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Solution Overview
Problem
Existing sheet material arrangements, such as awning cloths, experience distortion and waviness when rolled up onto a cylindrical shaft due to differences in tensile forces and material thickness across the edge regions.
Innovation Solution
A sheet material arrangement featuring a flexible primary sheet material and edge members with pivotable band-like legs, where the edge members can transition between a configuration for guiding the sheet material in a guide rail and a configuration for rolling up onto a winding shaft without distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sheet material has thicker edge regions with zip-fastener weltings for guidance in lateral guides, then the guidance function is improved, but the space requirement when rolled up increases and distortion occurs
Solution Approach 1:
The edge member incorporates a pivotable connection between the first leg (connected to sheet material) and the second leg (guide element). This dynamic joint allows the edge member to adapt its configuration: extending perpendicular to the sheet material when engaged in lateral guides for stable guidance, and folding parallel to the sheet material when rolled up to minimize thickness and prevent distortion.
2Stability of the object's composition
If the edge member is made rigid for stable guidance in lateral guides, then the guidance stability is improved, but the ability to roll up without distortion worsens
Solution Approach 1:
The pivotable connection creates a dynamic structure that transitions between stable extended configuration during guidance and compact folded configuration during rolling, resolving the contradiction between rigidity for stability and flexibility for adaptability.
Solution Approach 2:
The edge member is divided into two functional legs connected by a pivot joint. The first leg provides connection to the sheet material while the second leg provides the guide element, allowing each segment to perform its function independently while adapting to different operational states.
3Reliability
If the edge member extends perpendicular to the sheet material for guide rail engagement, then the guidance function is improved, but the thickness in edge regions increases causing distortion when rolled up
Solution Approach 1:
The pivotable connection enables the edge member to dynamically change its spatial configuration, extending perpendicular to the sheet material when guidance is required and folding parallel to minimize thickness during rolling operations.
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 sheet material arrangement can be rolled up onto a cylindrical shaft with minimal distortion, maintaining flatness and preventing the formation of waves or folds, while also providing secure guidance in lateral guide rails.
Implementation Method 1
The edge member (3) comprises two band-like legs (9, 11) that are connected to one another so as to be pivotable about a common pivot axis (A1)
Data Source
AI summary
A sheet material arrangement having a flexible primary sheet material and an edge member with two legs pivotably connected together. The first leg has two outer portions of a band-shaped secondary sheet material and is connected to the primary sheet material along an edge portion. A central portion of the secondary sheet material is looped around an insert transversely to the longitudinal direction of said secondary sheet material and, together with this insert, forms a second leg which is connected to the first leg so as to be pivotable about a pivot axis. In a pivoting position, with the legs arranged approximately parallel, the edge member and the sheet material can be rolled up on a winding shaft. In a further pivoting position, the legs form an angle of inclination different than 0°, with the result that the second leg is useable for guided displacement in a guide rail.