Bag retaining fixture
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Solution Overview
Problem
Bagging stations designed for plastic bags often struggle to hold paper-type bags in place while they are being filled, as the hooks used for plastic bags are not effective for paper-type bags, leading to movement and instability.
Innovation Solution
A bag retaining fixture comprising an elongate rod and a roller wheel that captures the side of a paper bag between the roller wheel and the side wall of the bagging station, keeping the bag stable and preventing it from falling or moving during filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hooks are used to hold bags at the bagging station, then plastic bags can be held effectively, but paper-type bags cannot be held and move around
Solution Approach 1:
The bag retaining fixture is designed to work with both plastic bags and paper-type bags through a dual-mechanism system. The spring-loaded roller can accommodate bags of different materials and structures, making the fixture universal for various bag types while maintaining reliable holding capability.
Solution Approach 2:
The spring mechanism allows the roller to adjust its pressure and position dynamically. When a bag is placed, the spring compresses to apply appropriate holding force, and the roller position adapts to different bag thicknesses and rigidities, enabling reliable holding across different bag parameters.
2Ease of operation
If paper-type bags are placed on the bagging station top surface, then they can be accessed easily, but they slide and move around
Solution Approach 1:
The roller acts as an intermediary between the bagging station surface and the paper bag. Instead of the bag directly contacting the smooth surface where it would slide, the roller provides a friction-based contact point that prevents sliding while still allowing easy access and operation.
3Stability of the object's composition
If a fixed rigid holder is used to prevent bag movement, then bag stability improves, but ease of bag insertion and removal decreases
Solution Approach 1:
The holder transitions from a static rigid structure to a dynamic spring-loaded system. The spring allows the roller to move and adjust automatically when a bag is inserted or removed, providing stability during holding while facilitating easy operation during bag changes.
Solution Approach 2:
The spring is pre-loaded to be ready to engage bags immediately upon insertion. This preliminary preparation of the spring mechanism ensures that no additional force or adjustment is needed when inserting or removing bags, maintaining both stability and ease of operation.
Data Source
AI summary
Described is a bagging station for use in a retail store to hold paper bags for filling with purchased products. The bagging station includes a bag retaining fixture for holding paper bags instead of hooks for holding plastic bags. The bag retaining fixture includes an elongate rod and a roller wheel. The elongate rod acts as an axle for the roller wheel. The elongate rod is coupled to a side wall of the bagging station. The elongate rod biases the roller wheel against the side wall. A side of a bag placed between the roller wheel and the side wall holds the paper bag in position on the bagging station so the bag can be filled with purchased items, then removed to be carried out of the store.