Multifunctional Ladder with Pivoting Frames for Stepladder and Platform Conversion
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Solution Overview
Problem
The existing stepladders and work platforms are inconvenient and uneconomical to prepare and store due to their separate requirements and storage needs.
Innovation Solution
A combined stepladder and work platform assembly that can easily convert between its functions, featuring a top frame with side rails, pivotally attached back and front frames, link bars, braces, and elastic feet, allowing for easy transformation between stepladder and work platform positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate stepladder and work platform are prepared, then each tool can perform its specific function, but preparation and storage become inconvenient and uneconomical
Solution Approach 1:
The patent combines a stepladder and work platform into a single integrated assembly. The stepladder portion includes side rails with steps, while the work platform portion includes a platform surface and support structure. These components are connected through pivot joints and braces, allowing one device to serve both functions of climbing and working at elevated locations, thereby eliminating the need to maintain separate tools.
Solution Approach 2:
The assembly is designed to perform multiple functions: it can be configured as a stepladder for climbing, as a work platform for accessing elevated areas, or in intermediate positions. The universal design allows a single device to replace multiple specialized tools, improving adaptability while reducing the complexity of preparing and storing separate equipment.
2Adaptability or versatility
If stepladder and work platform are used separately, then each can be optimized for its specific task, but conversion between functions is not possible
Solution Approach 1:
The assembly incorporates pivot joints at multiple locations, including between the stepladder portion and work platform portion, allowing dynamic reconfiguration between different functional states. The braces and linkages are designed to enable smooth transitions between stepladder mode, work platform mode, and intermediate positions, making functional conversion both possible and convenient.
Solution Approach 2:
The stepladder and work platform are divided into separate but connected segments through pivot joints. This segmentation allows each portion to be optimized for its specific function while maintaining the ability to convert between configurations. The modular segmented design enables easy reconfiguration without requiring complete disassembly.
3Ease of manufacture
If both stepladder and work platform are stored separately, then each can be stored in its optimal configuration, but storage space and effort increase
Solution Approach 1:
The stepladder portion and work platform portion are designed to nest within each other when not in use. The collapsible structure allows the components to be compacted into a small storage volume, significantly reducing the storage space required compared to maintaining separate stepladder and work platform configurations.
Solution Approach 2:
By merging the stepladder and work platform into a single integrated assembly, the invention reduces the total quantity of equipment that needs to be stored. Instead of storing two separate devices, only one combined assembly is required, thereby simplifying storage efforts and reducing the storage quantity 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 assembly allows for simple conversion between positions, provides stability and convenience in use, and facilitates easy storage and carrying by folding flat.
Implementation Method 1
The assembly includes an elastic foot attached at the lower end of each of the side rails of the front frame and an L shape elastic foot attached at the lower end of each of the side rails of the back frame
Data Source
AI summary
A combined stepladder and work platform assembly is provided. The assembly comprises a top frame having two side rails and footplate, a back frame pivotally attached to the back side of the top frame and having two side rails, and a front frame pivotally attached to the front side of the top frame and having two side rails. Link bars are provided so that they maintain steps horizontal together with the side rails of the front frame. Four braces secure the back frame and front frame with the top frame at a certain angle when the assembly is used as a work platform. The front frame, the top frame and the back frame form a triangular shape while the back frame is parallel to the floor when the assembly is used as a stepladder.