Variable Speed Postal Item Gripper for Wear Reduction
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Solution Overview
Problem
Existing apparatuses for processing postal items, such as those designed for banknotes, experience wear, high energy consumption, noise emissions, and reduced capacity when handling larger items due to frequent stopping and restarting of the endless belt.
Innovation Solution
Implementing a system where the speed of the feeding path and the circulation path differ temporarily, allowing for efficient hand-over of postal items to grippers, reducing energy consumption, noise, and wear while enabling higher capacity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the endless belt is repeatedly stopped and restarted to process banknotes, then the hand-over of items can be achieved, but the drive system experiences wear, energy consumption increases, noise emissions increase, and apparatus capacity decreases
Solution Approach 1:
The patent applies dynamics by making the belt speed variable rather than constant. The control unit dynamically adjusts the belt speed based on the processing state, allowing the belt to move faster during transport and slower during hand-over, eliminating the need for repeated stopping and starting while maintaining reliable item transfer
Solution Approach 2:
The patent changes the speed parameter of the endless belt dynamically. By controlling the drive motor to adjust belt speed according to processing requirements, the system achieves both high productivity and drive system reliability without the wear and noise associated with frequent stops and starts
2Reliability
If the endless belt is repeatedly stopped and restarted, then item hand-over can be achieved, but energy consumption increases
Solution Approach 1:
The patent ensures continuous useful action by maintaining continuous belt movement without repeated stops and starts. The control unit maintains appropriate belt speed throughout the processing cycle, eliminating energy waste from acceleration and deceleration phases while ensuring reliable item hand-over through controlled speed variations
3Reliability
If the endless belt is repeatedly stopped and restarted, then item hand-over can be achieved, but noise emissions increase
Solution Approach 1:
The patent uses dynamic speed control to eliminate repeated stops and starts. The control unit continuously adjusts belt speed to match processing requirements, maintaining smooth operation that reduces mechanical noise and vibrations while ensuring reliable item transfer through controlled velocity variations
4Adaptability or versatility
If the belt is dimensioned more heavily for gripping larger items, then capacity for larger items increases, but the drawbacks of repeated stopping and starting are amplified
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting belt speed rather than relying on heavy belt dimensioning. The control unit modifies belt velocity to accommodate different item sizes and handling requirements, allowing the use of a lighter, more durable belt while maintaining the capability to handle various postal items without the wear issues of repeated stops and starts
Data Source
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AI summary
Apparatus (1) for gathering postal items (2) having a postal item feeding path (3) for feeding postal items (2) at a speed of transport and a postal item gripper (8) for gripping and subsequently releasing postal items (2). The gripper (8) is circulatable in a sense of circulation along a circulation path (10) downstream of the feeding path (3). Each time prior to gripping of one of the postal items (2) by the gripper (8), at least the speed of transport of the gripper (8) is temporarily reduced to a reduced speed of transport or the speed of transport of the postal item (2) along the feeding path (3) is temporarily increased to an increased speed of transport. A method for gathering postal items (2) is also described.