Roll Screen Guide Member Spring Support
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Solution Overview
Problem
Existing horizontally-sliding roll screen devices face issues with deformation and sagging due to the weight of large screens, which can impede smooth operation and apply excessive load on fastener-like members, especially when installed in building openings with larger dimensions.
Innovation Solution
The roll screen device incorporates a guide member with flange portions and protruding walls in the upper horizontal frame, supported by an urging member like a spring, allowing the guide member to bend upward and distribute the weight evenly, preventing deformation and ensuring smooth operation without excessive load on fastener-like members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a larger screen is used to fit building openings with larger opening widths or areas, then the screen can cover the opening, but the weight of the screen increases causing deformation, warping, or straining of the guide member
Solution Approach 1:
An urging member (spring) is introduced to apply an upward force on the guide member, counteracting the downward force caused by the screen's weight. This prevents the guide member from deforming under the load of large screens, allowing the screen area to be increased without compromising the guide member's structural integrity.
2Strength
If the guide member is made thicker to support heavier screens, then the guide member can bear more weight, but the structure becomes more complex and may impede smooth movement of the operation stile
Solution Approach 1:
Instead of increasing the guide member's thickness to handle heavier screens, an urging member (spring) is used to provide upward support. This maintains the guide member's original simple structure while enabling it to support heavier screens, thus avoiding increased device complexity and preserving smooth operation stile movement.
3Stability of the object's composition
If the guide member is rigidly fixed to prevent bending, then deformation is prevented, but the fastener-like member experiences excessive load and operation becomes difficult
Solution Approach 1:
The guide member is designed with dynamic characteristics, allowing it to bend within certain limits while an urging member (spring) provides restoring force. This dynamic design prevents excessive load on the fastener-like member during operation while maintaining sufficient stability to prevent deformation, enabling smooth operation stile movement.
Solution Approach 2:
The urging member (spring) is pre-installed to provide cushioning support to the guide member before operation. This beforehand cushioning prevents the guide member from experiencing sudden excessive loads during operation, protecting both the guide member from deformation and the fastener-like member from excessive stress.
4Temperature
If a thicker screen is used to increase weight per unit area for better insulation, then insulation performance improves, but the screen weight increases causing sagging and deformation
Solution Approach 1:
The urging member (spring) applies an upward force to counteract the increased weight of thicker screens used for better thermal insulation. This prevents sagging and deformation of heavy screens while allowing the use of thicker materials for improved temperature insulation performance.
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 effectively prevents warping or straining of the guide member and screen, maintaining smooth operation and preventing unsightly sagging, while allowing for easy installation and maintenance by facilitating adjustments and compact folding of the inner horizontal frame.
Implementation Method 1
an urging member that applies an upward urging force to the guide member is provided between a corresponding one of the flange portions of the guide member and one of the protruding walls facing the flange portion
Implementation Method 2
The roll screen device incorporates a guide member with flange portions and protruding walls in the upper horizontal frame, supported by an urging member like a spring, allowing the guide member to bend upward and distribute the weight evenly
Data Source
Figure 1
Figure 2
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AI summary
[Object] To provide a screen device that is capable of preventing deformation such as loosening of a horizontally-sliding roll screen due to the weight of the screen. [Solution] A guide member 50 has a slit 51 that allows a fastener-like member 11 at an upper end of the screen 10 to be slidably engaged therewith in a retained state. In a state in which a space A, which allows bending in the vertical direction, is formed above the guide member 50, both end portions 50a and 50b of the guide member 50 are fixed to an upper horizontal frame 20 of a screen frame, flange portions 53 of the guide member are positioned above protruding walls 24 in the upper horizontal frame 24, and spring members 70 that apply upward urging forces to the guide member are provided between the protruding walls and the flange portions. Thus, deformation of a suspended shape of the screen in a spread state due to the weight thereof is suppressed by using the guide member.