Roll Paper Storage Near-End Detection Guide
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Solution Overview
Problem
Existing paper sheet storage devices struggle to accurately detect the near end of a roll paper sheet due to curling issues, especially when the roll becomes lighter and its diameter smaller.
Innovation Solution
A paper sheet storage device equipped with a near end detection unit and a pressing unit that presses the roll paper sheet in the direction of the detection unit, minimizing curling and ensuring accurate detection as the roll diameter decreases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drop-in type roll paper sheet that is not pivotally supported is used, then ease of operation is improved, but the roll paper sheet curls in various directions making near end detection difficult
Solution Approach 1:
A guide member is introduced as an intermediary component between the roll paper sheet and the storage device walls. This guide member constrains the roll paper sheet to follow a predetermined path, preventing it from curling in various directions while maintaining the ease of drop-in loading. The guide member acts as a mediator that resolves the conflict between operational simplicity and detection accuracy.
2Ease of manufacture
If the roll paper sheet is not constrained, then ease of manufacture is improved, but the roll paper sheet curls as diameter decreases making accurate detection difficult
Solution Approach 1:
The storage device is segmented into multiple functional components: a storage chamber for holding the roll paper sheet, a guide member to control the paper path, and a near-end detection device. This segmentation allows the guide member to specifically address the curling problem without complicating the overall manufacturing process, as each component can be manufactured independently and assembled together.
3Device complexity
If the roll paper sheet is allowed to move freely, then device complexity is reduced, but curling occurs when diameter becomes smaller than threshold
Solution Approach 1:
The guide member serves as a simple intermediary structure that provides minimal constraint to the roll paper sheet. It follows the roll paper sheet along a predetermined path without requiring complex mechanisms, motors, or sensors. This simple guide structure is sufficient to prevent curling and maintain stability while adding minimal complexity to the overall device.
Data Source
AI summary
In general, according to one embodiment, a paper sheet storage device that is capable of accurately detecting a near end of a stored roll paper sheet is provided. A paper sheet storage device in an embodiment includes a storage unit configured to store a roll paper sheet obtained by winding a long paper sheet, a near end detection unit configured to detect a near end since a diameter of the roll paper sheet stored in the storage unit becomes smaller, and a pressing unit configured to press the roll paper sheet stored in the storage unit in a direction of the near end detection unit.