Aerial Work Platform Extension Deck and Storable Step
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Solution Overview
Problem
Existing self-propelled scissors lifts face limitations in reaching high areas through small overhead openings, such as drop ceilings, due to fixed platform heights and lack of maneuverability, leading to unsafe working practices and inefficiencies in utility maintenance tasks.
Innovation Solution
A work platform with a main deck and extension deck, featuring raiseable guardrails and a moveable step, allowing for adjustable height and improved maneuverability on self-propelled aerial work apparatus, enabling safer and more efficient access to high areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a vertical access platform attachment is added to reach higher areas, then worker access to utilities above drop ceilings is improved, but the apparatus becomes significantly longer and less maneuverable in tight spaces
Solution Approach 1:
The platform is divided into two main segments: a main deck and an extension deck. The extension deck can be independently extended to provide additional height when needed, but can also be retracted to maintain a compact profile for maneuverability in tight spaces. This segmentation allows the platform to adapt its length according to the specific work requirements.
Solution Approach 2:
The extension deck is designed to be dynamically adjustable rather than fixed. It can be extended vertically to reach utilities above drop ceilings and then retracted back to the main deck level when not needed, allowing the platform to transition between different height configurations to optimize both access capability and maneuverability.
2Length of moving object
If the platform is elevated above the suspended drop ceiling, then worker access to utilities is improved, but the guardrails restrict further elevation due to safety requirements
Solution Approach 1:
The platform structure is segmented into a main deck with fixed guardrails and an extension deck that can be positioned above the drop ceiling. This segmentation allows the main platform to remain at a safe height with intact guardrails while the extension deck provides the necessary additional height for accessing utilities above the ceiling.
Solution Approach 2:
The extension deck acts as an intermediary element between the main platform and the utilities above the drop ceiling. It provides the additional height needed to reach overhead utilities while the main platform with its guardrails remains at a safe, stable elevation, thus mediating between safety requirements and access needs.
3Adaptability or versatility
If a specialized push around personnel lift is used, then access through small openings is improved, but the platform cannot be re-positioned without moving the entire lift and re-deploying outriggers
Solution Approach 1:
The platform incorporates an extendable extension deck that can be deployed from the main deck to provide access through small openings. This segmentation allows the main lift body to remain stationary while only the extension deck needs to be positioned, eliminating the need to re-position the entire lift and re-deploy outriggers for minor adjustments.
Solution Approach 2:
The extension deck is designed with dynamic positioning capabilities, allowing it to be extended, retracted, and repositioned independently of the main lift body. This dynamic design enables workers to adjust the platform position and extension deck configuration without moving the entire lift, significantly improving re-positioning flexibility and operational efficiency.
4Reliability
If the extension deck and moveable step are added to the platform, then worker access and safety are improved, but the overall weight of the platform increases
Solution Approach 1:
The moveable step is designed to be collapsible and storable when not in use. It can be folded against the extension deck or main platform, reducing the overall weight that needs to be supported during operation and minimizing the impact on lift capacity. This dynamic storage capability allows the safety features to be present when needed but compact when not required.
Data Source
AI summary
A self-propelled aerial work platform apparatus includes a chassis and elevating work platform with operator controls thereon. The work platform includes a main deck, an extension deck and a storable work step at one end of the extension deck to allow a worker to access utilities through openings in drop ceilings. The step and attached legs are moveable together from a horizontal work position of the step to a vertically extending storage position with step and legs alongside the step close to guardrails at the end of the extension deck.