Roller Retractable Stop for Conveyor Article Protection
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Solution Overview
Problem
Conveyors with retractable stops often cause damage to accumulated articles due to back line pressure and sliding friction when blocking and releasing, leading to wear and surface scratches.
Innovation Solution
The use of retractable stops with rolling contact surfaces, such as rollers, that move between blocking and retracted positions without sliding on the articles, reducing friction and preventing damage during accumulation and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flat plate stop mechanism is used to block articles on the conveyor, then articles can be accumulated upstream of the processing station, but the stop mechanism slides on the articles causing surface damage and label scratches
Solution Approach 1:
The patent replaces the flat plate stop with a cylindrical roller stop. The curved surface of the roller allows it to contact the vertical face of articles without sliding, eliminating surface damage and label scratches while maintaining the article accumulation function.
Solution Approach 2:
The patent replaces the sliding mechanical contact of a flat plate with a rolling mechanical contact of a cylindrical roller. This substitution changes the friction mechanism from sliding friction (damaging) to rolling friction (non-damaging), solving the surface damage problem while preserving the blocking and accumulation capability.
2Productivity
If a retractable stop is moved into the blocking position to stop articles, then articles can be accumulated, but back line pressure increases causing article damage and excessive loading of conveyor components
Solution Approach 1:
The cylindrical roller stop distributes contact pressure over a curved surface area rather than a flat plate contact point. This curvature allows better pressure distribution against the vertical face of articles, reducing peak stresses and preventing article damage from excessive back line pressure.
3Productivity
If the stop mechanism slides on articles to retract and release accumulated articles, then articles can be released for downstream processing, but sliding friction scratches or damages article surfaces and labels
Solution Approach 1:
The patent replaces the sliding motion of a flat plate with the rolling motion of a cylindrical roller during retraction. The roller rotates as it moves backward, creating rolling contact instead of sliding contact with the article surfaces, thereby eliminating scratches and damage while enabling smooth article release.
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
Prevents damage to articles and reduces conveyor belt wear by ensuring a rolling contact instead of sliding, effectively managing back line pressure and maintaining conveyor efficiency.
Implementation Method 1
The use of retractable stops with rolling contact surfaces, such as rollers, that move between blocking and retracted positions without sliding on the articles, reducing friction and preventing damage during accumulation and release
Data Source
AI summary
A conveyor having a retractable stop providing a nonsliding contact surface to the leading faces of conveyed articles to prevent damage to the faces of the articles. One version of such a stop has a contact surface defined by the peripheries of rollers that rotate on the accumulated articles as the stop moves from a blocking position accumulating articles on the conveyor to a retracted position releasing accumulated articles to advance downstream along the conveyor.