Retractable Step System Pit Safety
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Solution Overview
Problem
Conventional pit systems pose safety hazards due to the risk of users or items falling into the pit when it is not in use, and the frequent need to cover and uncover the pit is cumbersome, leading to reduced diligence and increased hazards.
Innovation Solution
A retractable step system with a frame, platform, floating steps, and a lifting mechanism that moves between elevated and lowered configurations, allowing the floating steps to cover the pit when elevated and form stairs when lowered, providing safe access to the pit while minimizing exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pit is left open for access, then ease of operation is improved, but safety hazards increase due to risk of users or items falling in
Solution Approach 1:
The step assembly is designed to be movable between a retracted position (covering the pit) and an extended position (providing access). The lifting mechanism enables dynamic transformation of the step assembly's position, allowing the system to adapt between safety mode (retracted) and access mode (extended), thus resolving the contradiction between ease of operation and safety hazards
Solution Approach 2:
The step assembly acts as an intermediary element between the open pit and the user. When extended, it provides a safe pathway for access; when retracted, it covers the pit opening. This intermediary structure enables controlled access while maintaining safety, eliminating the need to leave the pit completely open
2Object-affected harmful factors
If the pit is covered to ensure safety, then safety hazards are reduced, but ease of operation deteriorates due to frequent manual covering and uncovering
Solution Approach 1:
The lifting mechanism enables the step assembly to be raised and lowered automatically or with minimal effort, eliminating the need for users to manually cover and uncover the pit. The system serves itself by providing automated positioning of the step assembly between retracted and extended states, thus maintaining safety while improving ease of operation
Solution Approach 2:
The manual mechanical action of covering and uncovering the pit is replaced by an automated lifting mechanism. This mechanism can be electrically or hydraulically actuated, substituting the cumbersome manual process with an automated system that requires minimal user intervention, thereby resolving the contradiction between safety and ease of operation
3Object-affected harmful factors
If a fixed cover is used to cover the pit, then safety is improved, but adaptability deteriorates as it cannot provide access when needed
Solution Approach 1:
The step assembly transforms from a static fixed cover to a dynamic movable structure. It can be positioned in multiple states: retracted to cover the pit for safety, or extended to provide access. This dynamic capability allows the same structure to fulfill both safety coverage and access provision functions, resolving the contradiction between safety and adaptability
Solution Approach 2:
The step assembly serves multiple functions: it acts as a safety cover when retracted, and as an access pathway when extended. This multi-functionality eliminates the need for separate fixed cover and access structures, allowing a single element to provide both safety and adaptability as needed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The retractable step system effectively reduces safety hazards by allowing safe access to the pit when needed and automatically covering it when not in use, enhancing user safety and reducing the need for frequent manual covering and uncovering.
Implementation Method 1
a lifting mechanism operably connected to the frame and configured to move the frame between an elevated configuration, where the platform is positioned to be coplanar with the floor, and a lowered configuration, where the platform is lowered within the pit
Data Source
AI summary
A retractable step system comprising a frame provided within a pit. A platform is connected to the frame with an opening proximate the end of the frame. Floating steps are mounted on the frame adjacent one another and aligned with the opening. A set of stairs is provided within the pit aligned with the opening. A lifting mechanism is configured to move the frame between an elevated configuration, where the platform is coplanar with the floor, and a lowered configuration, where the platform is lowered within the pit. The floating steps are adapted to be coplanar with the platform and the floor when the frame is in the elevated configuration, thereby defining a temporary floor covering the pit. The floating steps are adapted to be sequentially deposited on the set of stairs when moving the frame from the elevated configuration to the lowered configuration to provide access to the pit.