Paper Sheet Processing Device Winding Speed Control
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Solution Overview
Problem
Existing sheet processing apparatuses face limitations in maximizing storage capacity within storage units.
Innovation Solution
A sheet processing apparatus comprising a winding-type storage unit, a transport unit, and a control unit that manages transport and winding speeds to optimize storage efficiency, allowing for slower transport from one storage unit to another and slower winding speeds within the first storage unit compared to transport speeds, thereby reducing intervals between sheets and increasing storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If sheets are stored by being wound around a drum together with a tape in a winding-type storage unit, then the storage capacity is increased, but the intervals between sheets remain large reducing storage efficiency
Solution Approach 1:
The patent applies dynamics by varying the transport speed during the sheet storage process. The transport unit operates at a first transport speed when moving sheets from the first storage unit to the second storage unit, then switches to a second transport speed (slower than the first) when transporting sheets from the second storage unit back to the first storage unit. This speed variation allows sheets to be wound more closely together, reducing intervals and increasing storage efficiency while maintaining the winding storage configuration.
Solution Approach 2:
The patent changes the transport speed parameter to optimize storage efficiency. By switching between two different transport speeds (first transport speed and second transport speed where second < first), the system adjusts the winding density of sheets on the drum. The slower second transport speed allows for tighter winding and reduced intervals between sheets, directly addressing the storage efficiency problem while preserving the winding storage method's capacity benefits.
2Productivity
If transport speed is increased to improve processing speed, then productivity increases, but the winding speed must also increase causing larger intervals between sheets
Solution Approach 1:
The system dynamically adjusts transport speed based on the direction of sheet movement. When sheets are transported from the first storage unit to the second storage unit, a faster first transport speed is used to improve processing speed. When sheets are transported from the second storage unit back to the first storage unit, a slower second transport speed is used to reduce winding intervals and increase storage density. This dynamic speed adjustment resolves the contradiction between processing speed and storage density.
Solution Approach 2:
The patent implements periodic action by alternating between two transport speed modes depending on the operational phase. The transport unit periodically switches between the first transport speed (for high-speed processing) and the second transport speed (for high-density storage). This periodic speed variation allows the system to achieve both high processing speed and high storage density at different times in the operational cycle, resolving the contradiction between these two parameters.
Data Source
Figure 1
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Figure 4A~4B
AI summary
A paper sheet processing device comprising: a first storage unit that is a winding type storage unit for storing paper sheet in a state of being wound around a drum together with tape; a second storage unit that stores the paper sheet; a transport unit that transports the paper sheet to the second storage unit at a first transport speed and that transports the paper sheet from the second storage unit to the first storage unit at a second transport speed; and a control unit that controls the first storage unit, the second storage unit, and the transport unit so that the second transport speed is less than the first transport speed and so that the winding speed when the paper sheet is wound by the first storage unit is a first winding speed that is less than the second transport speed.