Door Roller Bearing Prevents Track Dislodgement
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Solution Overview
Problem
Overhead closures in high-traffic areas, such as warehouse and industrial settings, are prone to damage from displacement forces like forklifts and cargo, leading to dislodgement of door rollers from their tracks, resulting in operational downtime and potential need for repair or replacement.
Innovation Solution
A novel door roller design featuring a bearing that rolls on a piece of round stock within a door guide, which contacts the stock when a dislodgement force is applied, preventing the roller from being dislodged and allowing the door to remain operational even when bowed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional door roller design is used in high-traffic areas, then the door can operate normally under light conditions, but the roller will dislodge from its track when struck by heavy objects like forklifts or cargo
Solution Approach 1:
The patent introduces a third dimension of protection by adding a bearing that contacts the round stock perpendicular to the track plane. This creates a dimensional barrier that prevents dislodgement forces from ejecting the roller from the track, allowing the door to deflect and hinge at angles while maintaining operational integrity
Solution Approach 2:
The round stock and bearing combination acts as a pre-positioned cushioning mechanism that engages before catastrophic failure occurs. When dislodgement forces are applied, the bearing contacts the round stock to absorb and redirect the impact, preventing the roller from being ejected from the track
2Strength
If the door is designed to be robust against strikes, then the door can withstand impacts from forklifts and cargo, but the door structure becomes more complex
Solution Approach 1:
The bearing serves multiple functions simultaneously: it supports the roller assembly during normal operation, provides impact absorption during strikes, and enables angular deflection capability. This multi-functionality achieves robust impact resistance without proportionally increasing structural complexity
Solution Approach 2:
The round stock acts as an intermediary element between the track and the bearing, creating a controlled contact point that mediates the interaction between the roller assembly and dislodgement forces. This intermediary mechanism simplifies the overall structure compared to fully rigid reinforced assemblies
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 enhances the resistance of door rollers to dislodgement forces, reducing downtime and the need for repairs by maintaining door functionality despite impacts, enabling the door to hinge at various angles while continuing to roll.
Implementation Method 1
The door roller includes a bearing that rolls on a piece of round stock that is part of a door guide
Data Source
AI summary
A closure is described. In a preferred embodiment a novel door roller is presented that is more resistant to a dislodgement force. The door roller comprises a bearing that rolls on a piece of round stock that is part of a door guide. When a dislodgement force is imposed on the door, the door bows and the bearing contacts the stock preventing dislodgement of the door roller from its track and allow the door to remain operational.