Polymeric Retail Cart Assembly for Lightweight Rigid Stocking
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Solution Overview
Problem
Traditional metal-framed retail carts are heavy and require special tooling for assembly and mobility, making them difficult to maneuver and assemble without tools.
Innovation Solution
A polymeric retail cart with a base unit and side attachment members featuring mobile transport rollers, stabilizers, and slideable shelving units, allowing for easy assembly and disassembly without tools, while maintaining structural rigidity through injection molded thermal reinforced plastic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal frame assemblies are used to provide structural rigidity, then the cart has sufficient strength and rigidity, but the cart becomes heavy and requires special tooling for assembly
Solution Approach 1:
The patent changes the material parameter from metal to polymeric material, specifically using injection molded thermal reinforced plastic. This parameter change reduces the weight of the cart while maintaining the necessary structural rigidity through the inherent properties of the thermally reinforced polymeric material and its molded structural design.
Solution Approach 2:
The patent employs composite materials by using thermally reinforced plastic, which combines polymeric base material with reinforcing elements. This composite structure provides the necessary strength and rigidity comparable to metal while significantly reducing the overall weight of the cart assembly.
2Stability of the object's composition
If metal frame assemblies are used, then the cart has sound structure, but it requires special tooling to assemble and attach the frame
Solution Approach 1:
The polymeric cart components are designed to self-assemble without requiring special tooling. The injection molded parts incorporate integrated attachment features that allow workers to assemble the cart using simple manual operations, eliminating the need for specialized assembly tools while maintaining structural integrity.
Solution Approach 2:
The patent merges multiple functions into single polymeric components. The injection molding process integrates structural support, attachment mechanisms, and stabilizer integration into unified parts, simplifying the assembly process while ensuring structural stability.
3Force
If traditional metal carts are used, then the cart provides adequate support, but it is difficult to maneuver due to weight
Solution Approach 1:
By changing the material parameter from metal to polymeric material, the patent reduces the cart's weight while maintaining load-bearing capacity. The thermally reinforced plastic provides sufficient structural support for merchandise while making the cart easier to maneuver and reposition.
Data Source
AI summary
A retail cart for use in storing and stocking merchandise and, more particularly, to a mobile polymeric retail cart which is easily assembled and disassembled without the need for tools having opposing forces in its construction lending rigidity to the overall structure and a plurality of slideably received shelving units.