Dismountable Wall Bars with Removable Rungs and Rotational Locking
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Solution Overview
Problem
Conventional wall-mounted ladders require significant space and are cumbersome, necessitating unscrewing for disassembly, complicating user experience and limiting flexibility of use.
Innovation Solution
A trellis system with retractable bars that engage into notches on uprights, featuring cylindrical engagement portions with parallel flats and rotational locking, allowing easy mounting and dismounting, and ensuring secure hold through notches and secondary locking means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bars are screwed to uprights to remain in position, then the hold is secure, but disassembly requires essential unscrewing which complicates user experience and reduces flexibility
Solution Approach 1:
The engagement portion is segmented into a cylindrical body with parallel flats, allowing the bar to be inserted through the access path and then rotated to engage the flats with the notch walls, creating a secure hold that can be easily released by reversing the rotation
Solution Approach 2:
Instead of using threaded screws that require unscrewing, the invention uses a reverse-action mechanism where the bar is inserted normally and then rotated to lock, with removal achieved by rotating in the opposite direction - inverting the conventional screw operation sequence
2Stability of the object's composition
If conventional wall-mounted ladders are used, then structural stability is maintained, but significant space is required and bulk is increased
Solution Approach 1:
The ladder structure is segmented into removable bars that can be independently inserted and removed from the uprights, allowing the structure to be configured in different patterns or completely disassembled for compact storage, significantly reducing space occupation while maintaining structural stability when assembled
Solution Approach 2:
The system transitions from a static fixed structure to a dynamic reconfigurable structure where bars can be easily inserted and removed, allowing the ladder to adapt between being assembled for use and disassembled for compact storage, optimizing space utilization
3Ease of operation
If access path width is increased to allow easy insertion, then ease of operation improves, but rotational locking capability is compromised
Solution Approach 1:
The engagement portion has different local geometries: the cylindrical body with parallel flats provides the locking feature, while the access path is specifically dimensioned to be wide enough for easy insertion but narrow enough to prevent the bar from being removed without rotation, creating localized functional zones with different dimensional requirements
Data Source
Figure 1
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AI summary
The present invention relates to a trellis (2) comprising: - two uprights (4) each provided with notches (6) distributed along said upright; - bars (8) capable of retractably engaging in the notches of the uprights; remarkable in that each of the bars comprises at each of the two ends (8.1) of said bar a cylindrical engagement portion (9) of diameter D with two parallel flats at a distance M from each other; and each of the notches comprises a notch bottom (6.2) of circular shape and an access path (6.1) to the notch bottom having a width (W) greater than or equal to the distance M and less than the diameter D, so as to allow sliding of the flats along the access path into the notch bottom followed by rotation of the bar preventing said bar from exiting from said notch bottom, and vice versa.