Sorting Paddle Pressure Control via Elastic Feedback
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Solution Overview
Problem
Existing high-speed sorting systems for flat items face complexity in precise adjustment of stacking pressure, leading to potential item jamming due to errors in stack pressure sensing.
Innovation Solution
A simplified stacking system with a dual-pressure mechanism using a paddle and driving device with endless belts and a movement control module, allowing synchronous and separate adjustment of stacking pressure without precise sensing, ensuring optimal item alignment and reduced jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a constant force spring and brake/clutch system are used to provide urging force and drag to the paddle, then heavy mail pieces are supported more effectively, but the system becomes complex and requires precise adjustment of stacking pressure
Solution Approach 1:
The patent removes the complex brake/clutch system and constant force spring mechanism from the stacking system. Instead, it uses a simple elastic element (spring) that provides automatic pressure adjustment based on stack weight, eliminating the need for complex adjustable mechanisms while maintaining effective support for heavy mail pieces.
Solution Approach 2:
The elastic element in the stacking system automatically adjusts the stacking pressure according to the weight of the mail piece batch. The system self-regulates without requiring external control mechanisms or precise adjustment, as the spring force naturally adapts to the load, making heavy mail piece support effective without complex device architecture.
2Adaptability or versatility
If a brake/clutch system is used to provide adjustable drag to the paddle, then stacking pressure can be adjusted for different mail piece weights, but measurement precision errors lead to item jamming
Solution Approach 1:
The elastic element provides automatic feedback-based pressure adjustment. As mail pieces are stacked and the batch weight increases, the elastic element compresses and automatically adjusts the stacking pressure accordingly. This eliminates the need for separate measurement and control systems, preventing jamming by naturally adapting to the actual load without measurement errors.
Solution Approach 2:
The patent replaces the mechanical brake/clutch adjustment system with a purely elastic mechanical element. This substitution eliminates the need for complex adjustment mechanisms and measurement systems, providing reliable adaptability to different mail piece weights through simple elastic deformation that naturally prevents over-compression and jamming.
3Manufacturing precision
If stack pressure sensing is implemented for precise pressure adjustment, then stacking accuracy is improved, but the system complexity and potential for sensing errors increase
Solution Approach 1:
The elastic element serves as both the stacking mechanism and the pressure regulation mechanism. It automatically senses and responds to batch weight through its elastic deformation, providing precise pressure adjustment without requiring separate pressure sensors or control systems. The element self-regulates the stacking pressure based on the actual load, maintaining high stacking accuracy while minimizing system complexity.
Data Source
AI summary
A system for improving stacking of flat items stacked on edge and forming a batch of items in a sort bin (200a) of the type comprising a stacking deck (210) for supporting the batch of items, a paddle (220) movably connected to a shaft (224) mounted on the stacking deck for registering the batch of items while applying a first stacking pressure to the batch of items, a driving device (228) for applying at least another adjustable pressure to the batch of items for refining their registering against the paddle, and a movement control module (229) for controlling the driving device so as to adjust pressure in the batch of items, wherein the batch of items and the paddle are driven synchronously and separately.