Panel Door Linkage Design Without Torsion Springs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing panel door designs, such as those using torsion springs, pose safety hazards, require excessive reinforcement of building structures, and necessitate frequent maintenance due to spring failures.
Innovation Solution
A swing/link arm system with a base coupling point and upper/lower connectors, coupled to a column, is used to raise and lower the door, eliminating the need for torsion springs and transferring vertical loads directly to the foundation, and incorporating a truss or W-stabilizer for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a torsion spring design is used to open and close panel doors, then the door can be raised and lowered, but safety is compromised due to constant tension on the spring
Solution Approach 1:
The patent removes the torsion spring from the door operation system entirely. Instead of using a spring-based mechanism, the invention employs a link arm system with a pivot point that allows the door to be raised and lowered through mechanical linkage and counterweight, eliminating the dangerous constant tension associated with torsion springs.
Solution Approach 2:
The patent replaces the torsion spring mechanical system with a link arm and pivot mechanism. The new system uses a link arm connected to a pivot point on the building structure, with the door attached to the other end of the link arm, substituting the spring-based lifting mechanism with a mechanical linkage that provides safer operation.
2Ease of operation
If a torsion spring design is used, then the door can be operated, but building reinforcement is excessive due to force transfer to the building frame
Solution Approach 1:
The patent extracts the force transfer mechanism from the building frame by removing the torsion spring system. The link arm design allows the door to be operated through a pivot mechanism that reduces the direct force transfer to the building structure, thereby minimizing the need for extensive reinforcement.
Solution Approach 2:
The patent employs a counterweight mechanism that balances the door's weight, reducing the net force that must be transferred to the building frame. The counterweight offsets the door's weight, allowing the link arm system to operate with minimal force transfer to the building structure.
3Ease of operation
If a torsion spring design is used, then the door can be raised and lowered, but maintenance frequency increases due to spring failures
Solution Approach 1:
The patent removes the torsion spring component entirely from the door operation system. By eliminating the spring-based mechanism, the invention removes the source of frequent failures and maintenance requirements, providing a more reliable system with fewer moving parts that can fail.
Solution Approach 2:
The patent replaces the torsion spring mechanical system with a link arm and pivot mechanism that has fewer failure-prone components. The new system uses robust mechanical linkages and pivot points that are more reliable and require less maintenance compared to the constant-tension spring system.
4Reliability
If a swing/link arm system is used, then safety is enhanced and building reinforcement is reduced, but device complexity increases
Solution Approach 1:
The patent divides the door operation system into distinct functional segments: the link arm, the pivot point, the counterweight, and the door assembly. This segmentation allows each component to perform its specific function independently, simplifying the overall design while maintaining safety and reducing building reinforcement requirements.
Data Source
AI summary
A panel door with a swing/link arm system attached to a base coupling point with upper and lower connectors coupled to a column attached to the panel door. The former assembly creates a unique geometry that allows for easily raising and lowering a panel door. Further, it includes raising and lowering the panel door using a linear actuator or a hydraulic cylinder. The oversized doors must be stabilized using a truss or a W-stabilizer.