Pharmaceutical Packaging Roll Remaining Sheet Estimation
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Solution Overview
Problem
Existing medicine packaging apparatuses face challenges in accurately determining the remaining amount of medicine packaging sheet rolls due to variations in roll cutting and manufacturing processes, leading to inaccuracies in calculating the number of packages that can be made from the remaining sheet.
Innovation Solution
A medicine packaging apparatus that includes a roll support section with a rotating shaft, a rotation amount information outputting section, an information writing/reading section, and a remaining sheet amount estimation section, which calculates the remaining sheet amount based on rotation information and dimensional data without requiring the thickness of the sheet or air layers, allowing for precise estimation of the remaining sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the remaining amount is calculated by subtracting used length from original length, then the calculation is simple, but the measurement precision deteriorates due to variations in roll cutting and manufacturing
Solution Approach 1:
The patent replaces mechanical measurement methods (physical measurement of roll dimensions) with an information-based system that uses stored rotation count data and calculated sheet lengths. The core tube stores rotation count information, and the control unit calculates remaining amount based on this stored information rather than physical measurement, eliminating the need for complex mechanical measurement systems while achieving high precision.
Solution Approach 2:
The system continuously monitors and stores rotation count information during the packaging process, using this feedback data to calculate the remaining sheet amount. By accumulating rotation count data throughout the packaging operation and using this feedback to update the remaining amount calculation, the system achieves accurate real-time determination without requiring complex measurement systems.
2Loss of information
If the thickness of the sheet or air layers is measured to calculate remaining amount, then more information is available, but the device complexity increases
Solution Approach 1:
The core tube itself stores the necessary information (rotation count) required for calculating the remaining sheet amount. The system uses the core tube's own stored data rather than requiring external measurement devices or complex information gathering mechanisms. The control unit processes this self-provided information to calculate the remaining amount, eliminating the need for additional sensors or measurement systems.
3Measurement precision
If rotation amount information is stored and used to calculate remaining sheet, then measurement precision improves, but the device complexity increases due to additional components
Solution Approach 1:
The core tube serves multiple functions: it supports the packaging sheet roll, stores rotation count information, and provides dimensional information for calculations. By making the core tube a multi-functional component that handles both mechanical support and information storage, the patent avoids adding separate dedicated information storage devices, thereby limiting the increase in device complexity while achieving high measurement precision.
Data Source
AI summary
Medicine packaging apparatuses and methods for accurately determining a remaining sheet amount of a medicine packaging sheet are described. The apparatus includes: a roll support section to which a core tube of a medicine packaging sheet roll is attached; a sensor disposed in the roll support section for outputting a count value according to a rotation amount; a wireless reader-writer unit for writing information to a core tube IC tag and reading said information; an information generation section for generating information to be written to the core tube IC tag; a remaining sheet amount estimation section for estimating a current amount of remaining sheet based on the information and dimensional information of the core tube; and a controller which selectively performs an operation if a reference time-point count value is not yet written to the core tube IC tag and another operation if the count value is already written thereto.