Self-aligning Detection Device for Mail Sorting Receptacles
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Solution Overview
Problem
Existing mail item sorting machines face challenges in reliably detecting the presence of sorting receptacles within the housing, especially when they are offset, which can lead to parcels falling and pose safety risks to operators.
Innovation Solution
A self-aligning detection device comprising two levers mounted on a common pivot, where the second lever pivots to align with the first lever upon insertion of a receptacle, allowing for reliable detection of the receptacle's presence and accommodating positioning tolerance, utilizing a proximity effect such as magnetic detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple proximity sensor is used to detect receptacle presence, then the detection system is inexpensive and simple, but it cannot accommodate positioning tolerances and may give false readings when receptacles are off-center
Solution Approach 1:
The detection device uses a dynamic pendulum mechanism with two levers that can pivot and self-align. The first lever with the detecting element and the second lever with the activating element are mounted on a common pivot, allowing them to automatically adjust their positions to achieve alignment even when the receptacle is off-center. This dynamic adjustment capability enables reliable detection while accommodating positioning tolerances without requiring complex positioning systems.
2Measurement precision
If the detection device requires precise alignment between detecting and activating elements, then detection accuracy is high, but it cannot tolerate positioning variations of receptacles
Solution Approach 1:
The detection device employs a self-aligning mechanism where the two levers automatically adjust their relative positions through pivoting motion. When the receptacle is inserted, even if off-center, the gravitational force and mechanical coupling cause the levers to self-align until the detecting element and activating element are properly positioned relative to each other. This self-service alignment eliminates the need for external positioning mechanisms while maintaining detection precision.
3Ease of manufacture
If conventional proximity detectors are used, then the system is cost-effective and simple, but they can only detect very well-defined geometries like door closing
Solution Approach 1:
By mounting the detecting element and activating element on pivoting levers rather than fixed positions, the system transforms a conventional proximity detector into a versatile detection device. The dynamic pivoting mechanism allows the detector to accommodate various receptacle positions and orientations, extending the application flexibility of simple, cost-effective proximity detectors beyond their traditional fixed-geometry uses.
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
Ensures safe operation by preventing flap opening when a receptacle is not correctly positioned, allowing for safe handling and sorting operations without significant equipment changes or impact on existing methods, using conventional and cost-effective proximity detectors.
Implementation Method 1
the detecting element producing a detection signal by proximity effect when the activating element faces it
Data Source
Figure 1A~1B
Figure 2A~4
AI summary
A detection device comprising an activating element (220) and a detecting element (210) movable relative to each other, the detecting element producing a detection signal by proximity effect when the activating element faces it, a pendulum system with a first lever (212) carrying the detecting element (210) and a second lever (222) carrying the activating element (220), said levers being mounted on a common pivot (230) by being angularly offset from each other, the second lever being designed to pivot from a rest position in the direction of the first lever under the effect of a push until an alignment state where the activating element and the detecting element are aligned and in that said first and second levers are designed so that from the alignment state and under the effect of the push, the second lever pivots the first lever over a certain angular range.