Self-Energizing Strap Tensioning Wheel for Adjustable Strap Channels
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Solution Overview
Problem
Existing strapping machines face issues with strap mis-feed and damage when using smaller-width and/or 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 movable between retracted and tensioning positions, and adjustable strap channels to prevent strap wandering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed-width and fixed-thickness strap channels are used to accommodate the widest and thickest strap, then the strapping machine can handle heavy-duty applications, but smaller-width and/or thinner strap cannot be properly guided and tends to wander and snag
Solution Approach 1:
The patent makes the strap channel dimensions dynamic and adjustable rather than fixed. The guide members can be repositioned along the strap channel to change its width and thickness dimensions, allowing the channel to adapt to different strap sizes while maintaining proper guidance and preventing wandering or snagging
Solution Approach 2:
The patent changes the physical parameters of the strap channel by allowing adjustment of guide member positions. This enables the channel width and thickness parameters to be modified according to the specific strap being used, ensuring optimal fit and guidance for each strap size
2Ease of operation
If a tensioning wheel is moved from retracted position into contact with the strap using an actuator, then strap tensioning can be achieved, but the actuator adds space requirements, weight, mechanical complexity, and potential failure points
Solution Approach 1:
The patent implements a self-energizing tensioning wheel mechanism where the strap itself provides the force to engage the tensioning wheel. As the strap is fed through the channel, it automatically contacts and engages the tensioning wheel, eliminating the need for an external actuator to move the wheel into contact with the strap
Solution Approach 2:
The patent removes the actuator component from the system entirely. The function of moving the tensioning wheel into contact with the strap is achieved through the strap's own movement and engagement with the wheel, extracting the unnecessary actuator that added complexity and potential failure points
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 solution ensures proper strap alignment and tensioning across various strap sizes, reducing mis-feed and damage, thereby enhancing operational efficiency and minimizing material waste.
Implementation Method 1
The strap-tensioning assembly then moves a tensioning wheel into contact with the strap and drives the tensioning wheel to tension the strap to a designated strap tension.
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.