Banknote Conveyance Roller Guide Plate Deformation
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Solution Overview
Problem
The existing bank note processing devices with roller conveyance sections face reliability issues due to deformation of the guide plates under reaction forces, leading to conveyance troubles and reduced reliability.
Innovation Solution
A medium conveyance device design that includes adjacent conveyance paths with drive and driven rollers, and contact-pressure portions to apply forces, along with support portions to receive and cancel out reaction forces, preventing guide plate deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the shaft is fixed to the guide top plate via ribs rather than to the frame, then the number of members is reduced and space is saved, but the guide top plate bends under reaction force causing conveyance troubles
Solution Approach 1:
The invention merges the support function into the guide top plate by forming a support protrusion directly on the guide top plate that engages with the shaft. This integration eliminates the need for separate support members while maintaining structural integrity and preventing plate bending under reaction forces.
Solution Approach 2:
The invention adds a vertical dimension to the support structure by forming a support protrusion that extends upward from the guide top plate surface. This three-dimensional feature provides structural reinforcement without adding separate horizontal components, thereby reducing overall device complexity while preventing deformation.
2Device complexity
If the guide top plate is used to support the shaft, then the structure is simplified, but the plate bends under reaction force leading to conveyance path deformation
Solution Approach 1:
The invention segments the guide top plate structure by creating a distinct support protrusion feature that is formed as an integral part of the plate. This segmentation allows the plate to maintain its simplified overall structure while incorporating a localized reinforcement element that prevents bending and maintains conveyance path precision.
3Device complexity
If fewer support structures are used, then device complexity is reduced, but the guide plate deforms under reaction forces
Solution Approach 1:
The invention applies local quality by creating a support protrusion with specific geometric characteristics (height, width, engagement features) at the precise location where the shaft contacts the guide top plate. This localized structural enhancement provides the necessary stability and rigidity exactly where needed, without requiring additional support structures throughout the entire device.
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 design enhances the reliability of medium conveyance by canceling out reaction forces that cause deformation, ensuring stable bank note conveyance without additional parts or materials.
Implementation Method 1
Coiled portions 40, which are front and rear direction center sections of single metal rods of springs 38 that are torsion bar springs, are coiled around a cylindrically shaped shaft 36
Implementation Method 2
springs 38 that are torsion bar springs
Implementation Method 3
first drive rollers that contact the medium and that cause the medium to move by rotation
Data Source
AI summary
The present invention provides a medium conveyance device whose reliability is enhanced. Namely, a roller conveyance section uses support parts to couple together an upper side shaft, which receives a first reaction force produced in accordance with a first contact-pressure force that urges first driven rollers toward first drive rollers, and a lower side shaft, which receives a second reaction force produced in accordance with a second contact-pressure force that urges second driven rollers toward second drive rollers. Because of this, the medium conveyance device of the present invention may cancel out the two reaction forces that cause an upper side guide and a lower side guide to bend in two bank note conveyance paths adjacent to one another.