Sheet Handling Apparatus with Inclined Shift Rollers
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Solution Overview
Problem
Conventional sheet handling apparatuses face instability and paper jam issues due to the use of skew and straight conveyance rollers, which cause deformation and skewing of paper notes, especially when handling notes of different sizes, and lack effective mechanisms for shift correction and obstruction detection.
Innovation Solution
A sheet handling apparatus with a conveyance path equipped with a shift mechanism that includes inclined rollers and a detection system to align and correct the position of paper notes, ensuring they are sorted correctly into respective receptacles, and features a switching mechanism to manage frictional forces for stable conveyance and shift execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If skew conveyance rollers are used to shift paper notes to the center, then positional adjustment is achieved, but paper notes are deformed by the rollers with different rotation directions causing paper jam
Solution Approach 1:
The conveyance system is divided into separate functional components: straight conveyance rollers for forward movement and skew conveyance rollers for positional adjustment. This segmentation allows each component to perform its specific function without interfering with the other, preventing deformation while maintaining positional adjustment capability
Solution Approach 2:
The straight conveyance roller is retreated before the skew conveyance roller energizes to shift the paper note. This preliminary action creates space and ensures proper timing, allowing the paper note to be shifted without being deformed by simultaneous contact from both rollers
2Manufacturing precision
If the skew conveyance roller is energized midway during conveyance to cause shift, then positional correction is attempted, but the effective shift distance is shorter than the paper note length resulting in small shift magnitude
Solution Approach 1:
The system detects the paper note position in advance and retreats the straight conveyance roller before energizing the skew conveyance roller. This preliminary action allows the full shift distance to be utilized, achieving maximum correction magnitude rather than being limited by the remaining conveyance distance
3Device complexity
If one skew conveyance roller is used for putting to the center, then the structure is simple, but skew is generated due to biased biasing force concentrating pressure on one point
Solution Approach 1:
The biasing forces are intentionally made asymmetric with different magnitudes on each skew conveyance roller. This asymmetric configuration compensates for machining inaccuracies and prevents the paper note from skewing during the putting to center operation, distributing pressure more evenly across the contact points
4Device complexity
If conventional conveyance mechanisms are used without shift correction, then the structure is simple, but obstruction occurs upon storing since shift correction execution is not monitored
Solution Approach 1:
A monitoring system detects whether shift correction has been correctly executed and provides feedback to the control mechanism. This feedback enables real-time detection of improper shift correction, allowing the system to prevent obstructions by identifying and correcting issues before they affect the storing operation
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
The apparatus ensures stable and aligned conveyance of paper notes, preventing deformation and jamming, and allows for accurate sorting and storage even when handling notes of varying widths, with the ability to detect and correct positional shifts, thereby enhancing operational efficiency and reducing obstructions.
Implementation Method 1
a frictional force of the shift means on the sheet at the time of execution of shift is set to be larger than that of the conveyance means on the sheet
Data Source
AI summary
A sheet handling apparatus is proposed to be able to stably shift a position of a sheet. A sheet handling apparatus comprises: conveyance device for conveying a sheet; shift device, rotating in a direction inclined relative to a direction of conveyance of the sheet, for coming into contact with the sheet to shift a position of the sheet in a widthwise direction of conveyance; and shift presence and absence switching device for switching between a shift execution state, in which shift of the sheet is executed by the shift device, and a shift non-execution state, in which the shift is not executed by the shift device; wherein at least a part of that contact portion of the shift device, which comes into contact with a surface of the sheet, is positioned at a side of a shift direction relative to the conveyance device, which has a conveyance force during shift, and a frictional force of the shift device on the sheet at the time of execution of shift is set to be larger than that of the conveyance device on the sheet.