Adaptive Stairway Support Structure for Variable Rough Openings
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Solution Overview
Problem
Existing automatic ladders for attic access require custom sizing for each Rough Opening (RO) dimension, leading to increased manufacturing costs due to the need for specific supporting structures and motorized systems.
Innovation Solution
An adaptive supporting structure for stairways comprising a forward and rear structural module, with cantilever arms and a motorized system, allowing adjustable positioning to accommodate various RO dimensions, reducing the need for custom manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed supporting structure is designed for each Rough Opening dimension, then the stairway provides stable support and proper fit, but the manufacturing cost increases due to customization requirements
Solution Approach 1:
The supporting structure incorporates adjustable components that allow it to dynamically adapt to different Rough Opening dimensions. The angle-adjustable mechanism enables the structure to be configured for various ceiling angles and opening sizes, replacing the need for custom-built structures for each dimension while maintaining structural stability through proper mechanical engagement.
Solution Approach 2:
The structure utilizes adjustable parameters including angle adjustment mechanisms and reconfigurable support elements that can be modified to match different Rough Opening dimensions. This parameter adjustability allows a single structure design to accommodate multiple installation scenarios without requiring custom manufacturing for each dimension.
2Ease of manufacture
If the supporting structure is made adjustable to accommodate various RO dimensions, then manufacturing cost decreases, but the device complexity increases
Solution Approach 1:
The supporting structure is divided into modular segments including separate angle-adjustable components, support beams, and connection elements. This segmentation allows each module to be independently manufactured and then assembled in different configurations to match various Rough Opening dimensions, reducing overall device complexity while maintaining adjustability.
Solution Approach 2:
The structure employs universal components that can serve multiple functions across different installation scenarios. The angle-adjustable mechanism, for example, serves both as a structural support element and as a configuration tool for adapting to different ceiling angles, reducing the need for specialized components for each application.
3Ease of manufacture
If a single supporting structure design is used for all RO dimensions, then manufacturing cost decreases, but the fit and proper support for specific dimensions may be compromised
Solution Approach 1:
The structure incorporates dynamic adjustment capabilities that allow it to be precisely configured for each specific Rough Opening dimension during installation. The angle-adjustable mechanisms and reconfigurable support elements enable the single design to achieve precise fit and proper support for various dimensions through field adjustment rather than requiring pre-customization.
Data Source
AI summary
An adaptive supporting structure of a stairway for accessing space above or below an elevated structure. The adaptive structure includes a forward structural and a rear structural module. The forward module holds the system that limits the opening angle of the module and is hinged on the supporting structure that surrounds the Rough Opening in the ceiling. The spacing between the rear structural module and the forward structural module can be adjusted to whatever length of the Rough Opening in the ceiling. The rear structural module holds all the components of the automated ladder apparatus. The fixed section of the automated ladder is mechanically bridging both structural modules while the bottom part of the structural modules supports a cover that cooperates with a fixed fairing mechanically attached to a portion of the framing that surrounds the Rough Opening in the ceiling.