Actuatable Guard Assembly for Cellar Entry Safety
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Solution Overview
Problem
Cellar entries often pose tripping hazards, impose constraints on ingress and egress, and can be aesthetically unappealing and unsafe, violating safety codes and building regulations.
Innovation Solution
An actuatable system comprising a guard assembly that rises from the floor, an opening assembly with doors that open automatically, and an access assembly such as a staircase or elevator, all controlled by an engineered automated system to ensure safety and compliance with codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional cellar entry is used, then access to the cellar is provided, but tripping hazards and safety constraints are created
Solution Approach 1:
The cellar entry system employs dynamic components including movable doors that open automatically, retractable guard assemblies that rise and lower, and adjustable access assemblies that deploy steps or ramps. These dynamic elements allow the system to adapt its configuration based on operational needs, eliminating fixed tripping hazards while maintaining safety through controlled movement and positioning.
Solution Approach 2:
The cellar entry is divided into separate functional assemblies: a door assembly for opening/closing, a guard assembly with rail and gate for safety barriers, and an access assembly for providing ingress/egress pathways. Each assembly operates independently and can be controlled separately, allowing the tripping hazard problem to be addressed by coordinating the movement of these segmented components rather than treating the entry as a single fixed structure.
2Ease of operation
If the cellar entry is opened for access, then ingress and egress are enabled, but additional constraints and safety hazards are imposed
Solution Approach 1:
The guard assembly is configured to rise and deploy safety barriers before the door fully opens, and the access assembly is positioned to provide safe pathways before users need to ingress or egress. This preliminary action ensures that safety measures are in place before the opening operation completes, preventing safety hazards from arising during the transition state when the door is partially open.
Solution Approach 2:
The guard assembly acts as an intermediary safety barrier between the open door and the cellar opening. The retractable gate and rail components provide a controlled interface that mediates user access, allowing ingress and egress while maintaining safety by preventing direct exposure to hazardous conditions at the cellar opening.
3Reliability
If safety features are added to the cellar entry, then compliance with codes is improved, but device complexity increases
Solution Approach 1:
Multiple safety functions are merged into integrated assemblies: the guard assembly combines barrier functions, gating mechanisms, and positioning systems into a single unit; the access assembly integrates step formation, ramp deployment, and pathway creation; the door actuation system coordinates all these components. This merging reduces overall system complexity compared to having separate safety devices for each function while maintaining full code compliance.
Solution Approach 2:
The guard assembly serves multiple safety functions simultaneously: it provides fall protection through the raised rail, controls access through the gate, and defines the safe operational boundary. The access assembly provides both structural support and safe pathways. This multi-functionality reduces the number of separate safety components needed, thereby reducing overall system complexity while achieving comprehensive safety code compliance.
Data Source
AI summary
An example system in accordance with an aspect of the present disclosure includes an opening assembly and a guard assembly installable in a floor above an enclosed region. The opening assembly is actuatable between an open configuration to provide access to the enclosed region, and a closed configuration in which the opening assembly provides a closed surface. A guard assembly is mounted to the opening assembly and actuatable independent of the opening assembly, between a retracted configuration flush with the closed surface of the opening assembly, and a deployed configuration to serve as a guard for the opening assembly.