Windable Canvas Protection System with Mobile Pulley Guidance
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Solution Overview
Problem
Existing canvas protection systems face challenges in achieving a fluid movement of the canvas while reducing mechanical constraints and preventing water accumulation when partially unrolled.
Innovation Solution
A wrapable canvas protection system featuring parallel guide bars, a transverse load bar with guidance rollers, and a mechanism with draw links connected inside the load bar, including a mobile pulley with a bearing plane and a rainwater evacuation channel to facilitate smooth movement and water drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the canvas is unrolled using traditional articulated arms or guide bar mechanisms, then the canvas can be deployed for protection, but mechanical constraints and friction increase, reducing movement fluidity
Solution Approach 1:
The system divides the canvas into multiple independent sections that can move and fold separately. Each section is connected through articulated joints that allow independent movement, reducing the mechanical constraints on the entire canvas and improving movement fluidity by allowing segments to navigate obstacles independently.
Solution Approach 2:
The canvas deployment mechanism transitions from traditional planar movement to three-dimensional articulated folding. The canvas can now move through multiple dimensions using articulated joints, allowing it to wrap around irregular surfaces and obstacles more effectively, reducing mechanical constraints by distributing movement across multiple spatial dimensions.
2Object-affected harmful factors
If the canvas is positioned horizontally or with slight inclination, then it provides effective sun and rain protection, but rainwater accumulates on the canvas surface causing harmful effects
Solution Approach 1:
The canvas positioning system transitions from static horizontal placement to dynamic adjustable inclination. The articulated mechanism allows the canvas to be positioned at varying angles depending on weather conditions, enabling optimal water drainage during rain while maintaining effective sun protection during clear weather, thus eliminating water accumulation without compromising positioning stability.
Solution Approach 2:
The system changes the inclination angle parameter of the canvas based on environmental conditions. By adjusting the angle of the canvas surface, the system optimizes water drainage during rainfall while maintaining effective sun protection during clear weather, thus preventing water accumulation without compromising the stability of canvas positioning.
3Reliability
If the canvas is wrapped tightly around the drum, then it maintains tension and proper positioning, but the mechanical constraints increase during unrolling and wrapping operations
Solution Approach 1:
The canvas is divided into multiple segments connected by articulated joints, allowing each section to move independently during unrolling and wrapping operations. This segmentation reduces the mechanical constraints on the entire canvas while maintaining proper tension through the coordinated movement of individual segments, improving unrolling fluidity without compromising canvas tension reliability.
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 system ensures a fluid and efficient movement of the canvas while maintaining tension and preventing water accumulation, enhancing operational robustness and fluidity.
Implementation Method 1
the mobile pulley with a bearing plane and a rainwater evacuation channel to facilitate smooth movement
Implementation Method 2
a rainwater evacuation channel to facilitate smooth movement and water drainage
Data Source
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AI summary
The invention relates to a protection system comprising: - At least one rollable canvas (1) comprising a first edge and a second edge opposite to the first edge, - Two guide bars (3a, 3b), positioned to define a guide plane (P) of the canvas, - A winding drum (10) to which the first edge of the canvas (1) is fixed, - A transverse load bar (5) fixed to the second edge of the canvas (1) to pull the canvas (1), - At each end of the load bar (5), a movable return pulley (71) is arranged between two guide rollers (50) and positioned to return a pulling link (7) along said guide plane (P), - The load bar (5) comprising, over at least part of its length, a support surface (54) of the canvas (1) located in the guide plane (P).