Self-Energizing Strap Tensioning Assembly for Variable Strap Sizes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing strapping machines face issues with strap mis-feed and damage when using smaller-width and thinner straps due to fixed-width and fixed-thickness strap channels, leading to unwanted downtime and material waste.
Innovation Solution
A strapping machine strap-tensioning assembly with self-energizing tensioning wheels and adjustable guide members that accommodate different strap sizes, featuring a tensioning-wheel assembly with a movable tensioning wheel and adjustable strap channel width to prevent strap wandering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed-width and fixed-thickness strap channels are used, then the strapping machine can accommodate the widest and thickest strap, but smaller-width and thinner strap will wander laterally and vertically in the strap channel causing mis-feed
Solution Approach 1:
The patent applies the dynamics principle by making the strap channel dimensions adjustable rather than fixed. The guide members can be repositioned to change the strap channel width and height, allowing the system to adapt dynamically to different strap sizes while maintaining reliable strap feeding without lateral or vertical wandering
Solution Approach 2:
The patent implements parameter changes by allowing modification of the strap channel geometric parameters (width and height) through adjustable guide members. This enables the system to optimize the strap channel dimensions for each specific strap size being used, preventing strap mis-feed while maintaining versatility across different strap specifications
2Power
If a tensioning wheel is moved from retracted position into contact with the strap using an actuator, then the strap can be tensioned, but the actuator takes up space, adds weight, adds mechanical and programming complexity
Solution Approach 1:
The patent applies the self-service principle by designing a self-energizing tensioning wheel mechanism that automatically moves into contact with the strap and engages the tensioning function without requiring an external actuator. The mechanism uses the strap itself or spring force to activate the tensioning wheel, eliminating the need for complex actuators while maintaining effective strap tensioning capability
Solution Approach 2:
The patent extracts the actuator component from the tensioning system, removing the source of mechanical and programming complexity. The tensioning wheel is designed to function independently without an actuator, taking out the problematic component while preserving the essential power function of strap tensioning
3Ease of manufacture
If fixed-width and fixed-thickness strap channels are used, then the structure is simple, but strap wandering causes unwanted downtime and material waste
Solution Approach 1:
The patent applies dynamics by transitioning from fixed to adjustable guide members, allowing the strap channel dimensions to be modified based on the strap size being used. This maintains structural simplicity while eliminating strap wandering issues that cause downtime and material waste, thereby improving operational efficiency
Data Source
AI summary
Various embodiments of the present disclosure provide a strapping machine strap-tensioning assembly with a self-energizing tensioning wheel and features that enable adjustment of the strap-tensioning assemblies for use with different strap sizes.