Screen Apparatus Vertical Rails Wind Deflection
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Solution Overview
Problem
Existing screen devices face deflection issues due to wind pressure when the width in the opening and closing direction is large, compromising light blocking and insect-proof functions.
Innovation Solution
The implementation of a screen device with vertical rails connected by a tensioning member, which reinforces the screen's surface strength by sliding parallel to the screen mounting frames, preventing deflection from wind pressure and ensuring stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the width in the opening and closing direction is made large, then the screen device can cover larger openings such as wide windows or doors, but the screen deflects significantly under wind pressure, generating large gaps that impair light blocking and insect-proof functions
Solution Approach 1:
The patent introduces vertical rails that extend in the width direction (perpendicular to the sliding direction) to provide reinforcement. This adds a dimensional element that counteracts wind pressure forces acting on the large-area screen, preventing deflection while maintaining the ability to cover wide openings
Solution Approach 2:
The screen device combines multiple structural elements (screen, sliding guide frames, vertical rails, connecting members) into a composite system. The vertical rails made of rigid material work together with the flexible screen and sliding mechanisms to create a unified structure that maintains rigidity against wind pressure while allowing controlled movement
2Strength
If vertical rails are added to prevent screen deflection, then wind pressure resistance is improved, but the device complexity increases
Solution Approach 1:
The vertical reinforcement is segmented into discrete vertical rails that are distributed across the screen width. These rails are connected by spacing members rather than forming a continuous rigid structure, reducing overall complexity while maintaining sufficient wind pressure resistance
Solution Approach 2:
The vertical rails and connecting members are integrated into the existing sliding guide frame structure. The rails work within the space defined by the sliding mechanism, and connecting members attach the rails to the existing frame components, nesting the reinforcement elements within the overall device architecture
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
In a screen device, a pair of vertical rails 24 arranged on the front and back sides of a screen 8 so as to oppose to each other are connected by connecting members 30 and are fixed between a pair of sliding guide frames 10a and 10b with the intermediary of the screen. The connected vertical rails are integrally slidable in the direction parallel to the direction of sliding movement of a screen mounting frame, so that the screen is restrained from being deflected even when it receives a wind pressure in the closed state when the width in the opening and closing direction is large.