Rolling Door Lock with Nested Corrugated Surface
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Solution Overview
Problem
Rolling steel doors are susceptible to penetration due to upward bending of slats at the bottom bar, which creates a gap, even when sliding locks are engaged, as the existing configuration lacks sufficient stiffness to prevent this deformation.
Innovation Solution
A locking mechanism with a corrugated surface that is adjustable between unlocked and locked positions, featuring a radial and transverse portion, pivotally connected to the door frame, and including engagement surfaces to resist movement and deformation, and a hasp opening for additional security, ensuring the corrugated surface of the locking mechanism nests with the door structure to prevent undesired bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sliding locks are engaged with frame members, then the door is secured against opening, but the slats can still bend upward creating a gap for penetration
Solution Approach 1:
The locking mechanism features a nested corrugated surface design where the protrusions on the locking mechanism engage with corresponding recesses in the door structure's corrugated surface. This nesting arrangement provides mechanical interlocking that prevents upward bending of slats while maintaining a compact structure.
Solution Approach 2:
The locking mechanism incorporates a corrugated surface with curved protrusions and recesses that match the door structure's corrugated profile. This curved geometry distributes forces more effectively and provides resistance against bending moments applied to the slats.
2Stability of the object's composition
If the locking mechanism engages with the door structure, then deformation is prevented, but the mechanism adds complexity to the door assembly
Solution Approach 1:
The locking mechanism serves multiple functions: it provides lateral locking engagement through the corrugated surface nesting, prevents upward slat bending through the engaged protrusions and recesses, and maintains door structure stability. This multi-functionality reduces the need for separate components.
Solution Approach 2:
The locking mechanism utilizes changes in the geometric parameters of the corrugated surfaces (protrusion height, recess depth, spacing) to achieve effective engagement. By optimizing these parameters, the mechanism achieves high stability with a relatively simple design.
Data Source
AI summary
A locking mechanism for use with a door structure having a corrugated surface includes a main body having a corrugated surface. The locking mechanism is configured to be adjustable between an unlocked position where the corrugated surface of the main body is not nested relative to the corrugated surface of the door structure and a locked position where the corrugated surface of the main body is nested relative to the corrugated surface of the door structure. The corrugated surface of the main body includes a plurality of engagement surfaces. Each of the engagement surfaces is configured to resist movement and/or deformation of the door structure with respect to a direction of movement of the door structure associated with the door structure being moved from a closed position towards an open position.