Weighing Device for Piece Goods Using Sequential Removal
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Solution Overview
Problem
Existing checkweighers require significant space and increased complexity due to the need for separate handling and adaptation to different sizes of piece goods, leading to inefficiencies in throughput, especially when handling small goods.
Innovation Solution
A weighing device and method that allows for simultaneous or sequential weighing of multiple piece goods on a single scale, using a weighing belt for continuous removal and evaluation of weight differences to determine individual or group weights, eliminating the need for separate handling and sorting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the weighing belt is dimensioned to accommodate the largest unit load, then the device can handle large piece goods, but the belt speed must be increased significantly to maintain throughput when weighing small piece goods
Solution Approach 1:
The invention segments the weighing process into multiple phases: first weighing multiple piece goods together on the weighing belt, then successively removing them one by one. This allows the belt to be optimized for a moderate speed suitable for smaller goods while still accommodating larger total weights during the initial weighing phase, eliminating the need to increase belt speed significantly for small piece goods.
Solution Approach 2:
The invention merges multiple piece goods onto the weighing belt simultaneously for the initial weighing. By combining several smaller piece goods into a single weighing group, the system can use a moderate belt speed while still achieving efficient throughput, as the weight measurement captures the combined weight which is then allocated to individual items through sequential removal.
2Measurement precision
If piece goods are separated for individual weighing, then accurate weight measurement is achieved, but the effort and space requirement increase
Solution Approach 1:
The invention segments the weighing process temporally rather than spatially. Multiple piece goods are weighed together in one phase, then separated and removed sequentially in subsequent phases. This temporal segmentation allows accurate weight measurement without requiring complex separation equipment before weighing, as the separation occurs after the weighing event.
Solution Approach 2:
The invention performs the weighing action preliminarily on multiple piece goods before their final separation and distribution. By weighing the group first and then removing items sequentially while tracking the weight changes, the system achieves accurate individual weight measurements without requiring pre-separation of each piece good, thereby reducing device complexity.
3Productivity
If multiple piece goods are weighed together simultaneously, then throughput increases, but the ability to handle different sizes of piece goods decreases
Solution Approach 1:
The invention makes the weighing system dynamic by allowing flexible combinations of piece goods to be placed on the weighing belt based on their sizes and weights. The system can adapt each weighing cycle to accommodate different sizes of piece goods by selecting appropriate groups, while maintaining high throughput through the efficient sequential removal process. The weighing belt dimensions and speed can be optimized for the typical combined weight rather than individual maximum sizes.
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
This approach enables efficient processing of a wide range of piece goods sizes, increases throughput, and simplifies the production line by eliminating the need for upstream separating devices, allowing for dynamic weight detection during movement and reducing operational complexity.
Implementation Method 1
a scale with a weighing receptacle for two or more piece goods
Data Source
Figure 1~4
Figure 5~8
AI summary
Disclosed are a weighing device for a production machine or facility and a method for weighing part loads from a production machine or facility. Said device and method can be implemented in a compact manner and/or allow part loads to be processed within a large range at the size of the part loads. In order to do so, the weight of two or several part loads (7', 7 ) as well as the weight modified by subsequently adding or removing an individual part load (7 ) or a number of part loads that are to be weighed together are detected. The weight of an individual part load (7') or a number of part loads that are to be weighed together can be determined from the difference between the weights detected.