Paper Sheet Shutter Mechanism for Foreign Object Blocking
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Solution Overview
Problem
Existing paper sheet handling apparatuses, such as banknote insertion/withdrawal units in ATMs, require complex structures with motors and power transmission mechanisms to prevent foreign objects from entering through opening portions, complicating the design.
Innovation Solution
A paper sheet handling apparatus with movable facing sections and integrated shutter mechanisms that open and close opening portions using meshing gears and racks, eliminating the need for motors and power transmission mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If motors and power transmission mechanisms are used to close opening portions and prevent foreign objects, then foreign object prevention is improved, but device complexity increases
Solution Approach 1:
The shutter mechanism opens and closes automatically through meshing gears and racks integrated into the movable facing section, eliminating the need for external motors or power transmission mechanisms. The system uses its own structural movement to drive the shutter operation.
Solution Approach 2:
The shutter mechanism is merged with the movable facing section structure itself. The gears and racks are integrated into the facing section, combining the shutter function with the existing mechanical structure rather than adding separate motor-driven components.
2Extent of automation
If motors and power transmission mechanisms are installed to operate shutters, then shutter operation is automated, but ease of repair deteriorates
Solution Approach 1:
The shutter operates automatically through the mechanical meshing of gears and racks that are part of the movable facing section's own structure, eliminating external automation systems that would require complex maintenance.
Solution Approach 2:
The mechanism uses simple, mechanically robust gears and racks instead of complex motor assemblies, creating a system that is easier to maintain and replace if needed.
3Object-affected harmful factors
If fixed facing sections are used with opening portions, then foreign object prevention is improved, but adaptability deteriorates
Solution Approach 1:
The facing section is made movable rather than fixed, allowing it to change position while maintaining foreign object prevention through the integrated shutter mechanism that opens and closes based on the section's movement state.
Solution Approach 2:
The shutter mechanism is combined with the movable facing section, allowing the same structural component to perform both positioning and foreign object prevention functions dynamically.
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
Prevents foreign object entry while simplifying the apparatus structure by using movable facing sections with integrated shutter mechanisms, reducing complexity and potential failure points.
Implementation Method 1
the first facing section and the conveyance section include first shutter opening/closing units which open the first opening portion by meshing with each other to open the first shutter when the first facing section moves from the insertion position to the conveyance position
Data Source
AI summary
A paper sheet handling apparatus includes: a first facing section and a second facing section which are arranged so as to face each other in a facing direction with an insertion space interposed therebetween; and a conveyance section that conveys a paper sheet. The first facing section includes a first shutter that openably closes a first opening portion, and is disposed so as to be movable, in the facing direction, to an insertion position at a time when the paper sheet is inserted and a conveyance position at a time when the paper sheet is conveyed. The first facing section and the conveyance section include first shutter opening/closing units which open the first opening portion by meshing with each other to open the first shutter when the first facing section moves from the insertion position to the conveyance position.