Guide Unit for Substrate Transport with Rotating Rings
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Solution Overview
Problem
In substrate manufacturing for flat panel displays, precise positioning of side rollers is crucial to prevent damage and friction-induced damage during substrate transportation, as improper alignment can cause collisions and shaking, leading to substrate damage.
Innovation Solution
A substrate transporting apparatus with a guide unit featuring an outer ring and inner ring configuration, including bearings and a guide protruding from the outer ring to contact the substrate, which supports the substrate's side and prevents shaking, while being easily installable and adjustable to extend its lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the position of the side roller is not provided precisely, then the manufacturing cost and installation complexity are reduced, but the substrate is liable to collide against the side roller to damage the substrate
Solution Approach 1:
The guide unit is divided into an outer ring and an inner ring that can rotate relative to each other. The inner ring is coupled to the shaft while the outer ring contacts the substrate, allowing independent rotation of each component to accommodate positioning variations without compromising substrate protection.
Solution Approach 2:
The inner ring is designed to rotate relative to the shaft, transforming the static positioning problem into a dynamic solution. This rotation capability allows the guide unit to self-adjust to substrate position variations, maintaining precise guidance without requiring extremely precise initial installation.
2Manufacturing precision
If the side roller position is not precisely controlled, then the installation and maintenance become easier, but friction is generated between the substrate and side roller to damage the substrate
Solution Approach 1:
The rotatable inner ring design allows the guide unit to dynamically adapt to substrate position variations during operation. This eliminates the need for extremely precise static positioning while maintaining effective substrate guidance and minimizing friction throughout the operational lifecycle.
Solution Approach 2:
The system changes from a fixed positional parameter to a dynamic rotational parameter. Instead of requiring precise initial positioning, the inner ring's rotation angle becomes the adjustable parameter that automatically optimizes the contact point with the substrate during operation.
3Duration of action of stationary object
If a fixed guide unit structure is used, then the device complexity is reduced, but the guide unit lifespan is limited due to wear from substrate contact
Solution Approach 1:
The rotatable inner ring continuously changes its rotational position as the shaft rotates, distributing the wear from substrate contact across the entire circumferential surface of the inner ring over time. This dynamic wear distribution significantly extends the guide unit's operational lifespan compared to a fixed structure where wear concentrates at a single point.
Solution Approach 2:
The continuous rotation of the inner ring ensures that no single point on its surface remains in constant contact with the substrate. This continuous movement maintains the guidance function while preventing localized wear accumulation, thereby extending the overall service life of the guide unit.
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 guide unit effectively prevents substrate damage by ensuring precise linear movement and adjustable installation, enhancing the reliability and longevity of the transportation process.
Implementation Method 1
a plurality of bearings provided between the outer ring and the inner ring
Data Source
AI summary
An apparatus for transporting substrates and a guide unit are disclosed herein. A guide unit can prevent a substrate from shaking in a side direction when the substrate is transported by the rotation of a transporting roller. The guide unit includes an inner ring and an outer ring. The outer ring includes a ring-shaped guide protruding from an outer circumferential surface of the outer ring in a side direction. The outer circumferential surface of the outer ring comes in contact with the bottom edge of a substrate to support the substrate, and a side surface of the guide comes in contact with the side of the substrate to prevent the substrate from traveling in a side direction. The inner ring rotates with the shaft, and the outer ring rotates by a friction force with the substrate.