Ladder Locking Panel With Longitudinal Movement
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Solution Overview
Problem
Existing ladder access control systems are inadequate for preventing unauthorized access, particularly for inclined ladders, and may not securely lock the ladder when not in use, posing risks during storms.
Innovation Solution
A device with a locking panel that attaches to the rear of ladder rungs, featuring a degree of freedom in translation parallel to the ladder's longitudinal direction, and a lever mechanism for controlled access, ensuring the panel remains firmly attached and prevents unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a panel is used to mask the rungs of the ladder, then unauthorized access is prevented, but the panel may be unintentionally detached during storms
Solution Approach 1:
The connecting means incorporates a limited degree of freedom in translation parallel to the longitudinal direction of the ladder, allowing the panel to move dynamically in response to external forces such as wind during storms, while maintaining its locked position under normal conditions. This dynamic capability prevents unintentional detachment while preserving secure attachment.
2Stability of the object's composition
If the panel is firmly attached to the ladder, then the risk of accidental detachment is reduced, but unauthorized access may still occur through the sides of the ladder
Solution Approach 1:
The invention addresses side access by providing connecting means that extend along the longitudinal direction of the ladder, creating a multi-dimensional attachment system. The panel is not only attached transversely to mask the rungs but also secured longitudinally, preventing removal from either side of the ladder while maintaining firm attachment.
3Reliability
If a locking mechanism is added to prevent side access, then access control reliability is improved, but the device complexity increases
Solution Approach 1:
The connecting means serves multiple functions simultaneously: it attaches the panel to the ladder, provides limited longitudinal movement to prevent side access, and maintains secure attachment during storms. By integrating these functions into a single mechanism rather than adding separate locking components, the solution improves access control reliability without significantly increasing device complexity.
Data Source
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AI summary
The invention relates to a device for regulated access to an upper protected area, comprising a ladder (1) extending between a lower area from which a user can freely access and said upper protected area, and a means for prohibiting or preventing the use of at least some of the rungs (4) of this ladder, this means comprising a panel (5) and means for connecting it to the ladder which maintain the panel, in a first state, applied against the rear (B) of the rungs (4) of the ladder relative to its access face (A) and in a second state remote from these rungs (4), characterized in that the aforementioned connecting means (6) have at least one limited degree of freedom, in translation parallel to the longitudinal direction of the ladder (1) and which is exerted after the end of the movement of the panel when it passes from its second state to the first and before the start of the reverse movement.