Multi-staged Destacking Apparatus for Sequential Mail Item Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing item handling systems face challenges in continuously and sequentially destacking items from a stack without causing unwanted or unacceptable movement of following items, especially when the items are unsorted, unjustified, or vary in size and type.
Innovation Solution
A multi-staged destacking apparatus and method that uses friction belts, vacuum portions, and sensors to selectively move leading items in stages, detecting presence, position, and movement information to prevent unnecessary movement of subsequent items, and optionally adjusts force or pressure to optimize destacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-stage destacking mechanism is used, then the device complexity is reduced, but the precision of sequential item output deteriorates causing simultaneous output of multiple items
Solution Approach 1:
The destacking mechanism is divided into three distinct stages: first stage components (initial vacuum application), second stage components (intermediate vacuum application), and third stage components (final vacuum application). Each stage has its own vacuum portions and sensors that activate sequentially to move the leading mail item through different positions, ensuring precise control over the destacking process and preventing simultaneous output of multiple items.
2Productivity
If vacuum force is applied strongly to move the leading item quickly, then the productivity is improved, but the following items experience unwanted movement
Solution Approach 1:
The vacuum application is segmented into three stages with progressively stronger forces. The first stage applies initial vacuum to engage the leading item, the second stage applies intermediate vacuum to move it to an intermediate position, and the third stage applies final vacuum to complete the transfer. This segmented approach allows controlled acceleration while maintaining precision.
Solution Approach 2:
The system performs preliminary detection using sensors (including wheeled encoders and mail item presence sensors) to assess the position and movement of the leading item and following items before applying vacuum force. This allows the control system to adjust the vacuum application timing and intensity to achieve reliable sequential output.
3Measurement precision
If sensors are positioned to detect leading item position accurately, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The system combines multiple sensor types (wheeled encoders for position tracking and mail item presence sensors for detection) into an integrated sensing network. These sensors are strategically positioned at different stages to detect leading edge information, trailing edge information, and transition information, providing comprehensive position detection without requiring overly complex individual sensor systems.
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 system ensures continuous and sequential destacking of items in the correct order, reducing simultaneous output of multiple items and preventing unwanted movement, even when items are unsorted or vary in size and type, thereby maintaining a first-in-first-out format and improving operational efficiency.
Implementation Method 1
a first vacuum portion; a second vacuum portion; a third vacuum portion... The first and second vacuum portions can be operative to be on at all times during the continuous and sequential destacking
Implementation Method 2
Each of said first, second, and third stages of components can include a friction belt portion
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Systems, apparatuses, methods, and computer program products for item handling, including in-feeding and individually out-feeding of items, such as pieces of mail, parcels, or articles of manufacture. Destacking each successive leading item, individually, in a stack or series of items by automatically adapting, in real time, to varying item presentment conditions. Each successive leading item can be moved and output without unwanted or unacceptable movement of any following item or items, by selective activation of components to move and/or assist with moving the leading item for output therefrom. Selective activation can be based on presentment information associated with each leading item in the stack or series, and the leading item can be output after a series of controlled movements thereof.