Paper Sheet Inlet Shutter Coupling to Block Foreign Object Entry
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Solution Overview
Problem
Existing banknote insertion/withdrawal units in automatic transaction machines are prone to foreign object entry through opening portions, requiring motors and power transmission mechanisms for closure, complicating the structure.
Innovation Solution
A paper sheet handling apparatus with a first and second facing section that face each other, featuring a movable first shutter to openably close the first opening portion, meshing with a conveyance section shutter to prevent foreign object entry without the need for motors or power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shield member and motor are arranged to close the opening portion to prevent foreign object entry, then foreign object prevention is improved, but device complexity increases due to motor and power transmission mechanism
Solution Approach 1:
The conveyance section serves dual functions: it conveys paper sheets and simultaneously opens/closes the shutter to prevent foreign object entry. The shutter is mechanically coupled to the conveyance section so that the conveyance operation itself controls the shutter opening/closing without requiring separate actuation mechanisms.
Solution Approach 2:
The shutter opening/closing function is merged with the conveyance function. The same mechanical movement that conveys the paper sheet also actuates the shutter to open or close, combining two functions into one mechanism and eliminating the need for separate motors and power transmission systems.
2Reliability
If a motor and power transmission mechanism are used to drive the shield member, then shutter opening/closing reliability is improved, but ease of manufacture deteriorates due to complex assembly
Solution Approach 1:
The conveyance section automatically controls the shutter through mechanical coupling. The movement required for paper sheet conveyance inherently actuates the shutter, eliminating the need for separate control systems while maintaining reliable operation through direct mechanical linkage.
Solution Approach 2:
The shutter is positioned as an intermediary element between the conveyance section and the insertion space. It is mechanically coupled to the conveyance section, allowing the conveyance movement to indirectly control the shutter position without requiring direct motor actuation of the shutter itself.
3Ease of operation
If the opening portion remains open to allow paper sheet conveyance, then ease of operation is improved, but foreign object entry risk increases
Solution Approach 1:
The shutter is designed to dynamically change its state between open and closed positions based on the operational phase. It opens during paper sheet insertion to facilitate easy operation, then closes during conveyance to prevent foreign object entry, adapting its state to the current operational requirement.
Solution Approach 2:
The shutter closes in advance before foreign objects can enter the insertion space through the opening portion. The mechanical coupling ensures that as soon as the paper sheet is inserted and conveyance begins, the shutter automatically closes to prevent any foreign object entry risk.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A paper sheet handling apparatus (100) includes: a first facing section (10) and a second facing section (20) which are arranged so as to face each other in a facing direction (D1) with an insertion space (S1), into which a paper sheet (B) is inserted, interposed therebetween; and a conveyance section (40) that conveys the paper sheet in a state of protruding to the insertion space from a first opening portion (11a) of the first facing section. The first facing section includes a first shutter (12) that openably closes the first opening portion, and is disposed so as to be movable, in the facing direction, to an insertion position (P11) at a time when the paper sheet is inserted and a conveyance position (P12) at a time when the paper sheet is conveyed. The first facing section and the conveyance section include first shutter opening/closing units (13, 14, 15, 42) 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.