Zero Velocity Stacking Band Mechanism
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Solution Overview
Problem
Existing stacking technologies require significant human labor and risk repetitive strain injuries, and often result in product jamming due to non-zero velocity during stacking, especially when using automated systems like robotic arms, which can be complex and costly to manufacture and program.
Innovation Solution
A stacking apparatus utilizing a band that orbits and rotates around a path with rollers, allowing items to be stacked with approximately zero velocity by negating orbital movement through rotational swaps and engagement with guides, reducing the risk of jamming and the need for additional slowing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a robotic arm with suction mechanism is used for automated stacking, then automation is improved, but device complexity increases
Solution Approach 1:
The patent extracts the essential function of automated stacking from complex robotic arms and suction mechanisms, reducing it to a simple belt-driven system that delivers products directly to the stacking point without requiring complex gripping or positioning mechanisms
Solution Approach 2:
Instead of using a moving robotic arm to reach the stacking point, the patent inverts the approach by bringing the stacking point (stacker) to the product through the orbital motion of the belt system, eliminating the need for complex robotic manipulation
2Productivity
If products are moved towards the stacking point with non-zero velocity, then productivity is improved, but product jamming increases
Solution Approach 1:
The patent employs periodic orbital motion of the belt system, where the belt accelerates to deliver products efficiently, then decelerates to zero velocity precisely at the stacking point, creating a rhythmic cycle that balances productivity with reliable product placement
Solution Approach 2:
The system dynamically changes the velocity parameter of product delivery, transitioning from non-zero velocity during transport to zero velocity at the stacking point, thereby maintaining both productivity and reliability
3Reliability
If additional mechanisms are added to slow product momentum, then product jamming is reduced, but device complexity increases
Solution Approach 1:
The belt system serves its own velocity control function through its orbital mechanics, naturally decelerating to zero velocity at the stacking point without requiring external braking or slowing mechanisms
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
A stacking apparatus, comprises a roller set (120; 220) having at least first and second portions (122, 124; 222, 224, 226a,226c;222,224,226b,226d); a band (102; 202) passing against said first portion and said second portion of said roller set; and a mechanism (142, 144, 110; 242, 244) for causing said band to orbit along a path (112; 212), wherein said mechanism is arranged to cause said band to receive a stackable item and to move said stackable item to a predetermined location, wherein at said predetermined location, said band releases said stackable item by continuing to orbit along said path, but with approximately zero total velocity, and wherein at said predetermined location, said band has a rotation that is essentially negated by its orbital movement.