Retractable Anti-Drop Member for Multi-Height FOUP Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing SCARA arms are not suitable for supporting and preventing the dropping of both 300 mm and 450 mm FOUPs, as they cannot effectively manage the different heights and prevent taller articles from hindering the prevention of lower articles from dropping.
Innovation Solution
A supporting device with a first and second positioning member to secure the articles, and first and second anti-drop members to prevent elevation and escape, where the anti-drop members are positioned on the same side and retractable to avoid interference, allowing for simultaneous support and transfer of articles of different heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single anti-drop member is used for both 300mm and 450mm FOUPs, then the structure is simplified, but the taller FOUP hinders the anti-drop member from preventing the lower FOUP from dropping
Solution Approach 1:
The anti-drop member is divided into a first anti-drop member for 450mm FOUPs and a second anti-drop member for 300mm FOUPs. These segmented members operate independently at different positions, allowing each to effectively prevent dropping of its designated FOUP size without being hindered by the other size's dimensions.
Solution Approach 2:
The first and second anti-drop members are positioned at different heights corresponding to the different FOUP sizes. The first anti-drop member is positioned higher for the taller 450mm FOUPs, while the second is positioned lower for the shorter 300mm FOUPs. This vertical dimension differentiation resolves the interference problem between different FOUP sizes.
2Reliability
If separate anti-drop members are provided for different FOUP sizes, then dropping prevention reliability is improved, but device complexity increases
Solution Approach 1:
The supporting device integrates multiple functions into a unified structure. The first and second positioning members, along with the first and second anti-drop members, work together in a single supporting device to handle both 300mm and 450mm FOUPs. This multi-functional integration achieves reliable dropping prevention for different sizes without requiring entirely separate systems.
3Manufacturing precision
If positioning members are provided at different heights for different FOUP sizes, then positioning accuracy is improved, but the taller FOUP may interfere with positioning of the lower FOUP
Solution Approach 1:
The second anti-drop member is designed to be movable rather than fixed. It can move to a retracted position when the first FOUP is being positioned, eliminating interference. This dynamic adjustment allows the positioning members to operate at different heights with full positioning accuracy while preventing harmful interference between different FOUP sizes.
Data Source
AI summary
A supporting device includes a supporting member including a first positioning member positioning a bottom of a first article and inhibiting horizontal movement of the first article, and a second positioning member positioning a bottom of a second article and inhibiting horizontal movement of the second article. The first and second positioning members release the articles when elevated. The supporting device includes a first anti-drop member preventing the first article from being elevated and released and a second anti-drop member preventing the second article from being elevated and released. The first positioning member is higher than the second positioning member. The end of the first article closer to the first and second anti-drop members is nearer or equally distant to the first and second anti-drop members than a corresponding end of the second article. The second anti-drop member is retracted from the end of the first article when the first positioning member positions the first article.