Hybrid Banknote Handling Shifting Unit Alignment

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Solution Overview

Problem

Hybrid banknotes, combining paper and polymer films, pose handling challenges due to the polymer film's higher stiffness and thickness, leading to uneven winding and skewing issues in automatic cash transaction systems, causing positional displacement and skewing during storage and feeding.

Innovation Solution

A paper sheet handling machine with a transport unit, recognition unit, detection unit, and shifting unit that adjusts the position of hybrid banknotes to ensure proper alignment and overlap with the tape or rollers, preventing skewing and displacement by calculating shift distances based on recognition and detection results.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If hybrid banknotes with polymer film are wound onto a rotating member using a belt-shaped tape, then the banknotes can be stored in the banknote storing and feeding unit, but the polymer film's higher stiffness causes lower pressing force from the tape, resulting in uneven winding and conical shape formation

Engineering Contradiction:

Improvestorage reliabilityVSAvoidwinding uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by detecting the position of the polymer film portion before winding occurs, and pre-calculating the necessary shift amount to compensate for the conical shape that will form during winding. The shifting unit adjusts the banknote position in advance based on detection results, ensuring proper alignment despite the stiffness-induced pressing force reduction.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by using a detection unit to monitor the position of the polymer film portion on the banknote, feeding this information back to the control unit which then calculates and adjusts the shift amount via the shifting unit. This closed-loop control ensures continuous correction of positional deviations caused by the polymer film's stiffness during the winding process.

Inventive Principle:

Principle #23Feedback

2Productivity

If multiple belt-shaped tapes are arranged in alignment in the axial direction of the rotating member, then more banknotes can be wound, but the tape closest to the polymer film expands outward when hybrid banknotes are wound, forming a conical shape

Engineering Contradiction:

Improvewinding capacityVSAvoidbanknote alignment shape

Core Design Contradiction:

ProductivityVSShape

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies local quality by making the shifting amount position-dependent. Different regions of the banknote receive different shift adjustments based on where the polymer film is located. The control unit calculates specific shift amounts tailored to the detected polymer film position, allowing localized compensation for the conical shape formation while maintaining overall winding capacity.

Inventive Principle:

Principle #3Local quality

3Reliability

If the polymer film portion of the hybrid banknote is pressed by the belt-shaped tape, then the banknote can be wound onto the rotating member, but the pressing force is lower compared to paper-only banknotes, causing positional displacement

Engineering Contradiction:

Improvewinding reliabilityVSAvoidpositioning accuracy

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Inventive Principle:

Principle #23Feedback

4Extent of automation

If a banknote storing and feeding unit with rotating member and belt-shaped tape is used, then banknotes can be automatically stored and fed, but hybrid banknotes with polymer film cause skewing and positional displacement during storage and feeding

Engineering Contradiction:

Improveautomatic storage and feedingVSAvoidalignment precision

Core Design Contradiction:

Extent of automationVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP3267404B1Paper processing machine

Publication Date: 2021.12.01 GLORY LTD

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AI summary

A paper sheet handling machine (for example, a banknote handling machine (10)) includes: a storage unit (for example, an escrow unit (20), banknote storages (30), a banknote storage cassette (40)) configured to store a paper sheet transported from a transport unit (16); and a shifting unit (19) provided in the transport unit (16) and configured to shift the paper sheet transported by the transport unit (16), in a width direction orthogonal to a direction in which the paper sheet is transported, according to a position, in the width direction, of a specific member (for example, a tape (136) in the escrow unit (20), a pair of feed rollers of a banknote feeding mechanism (32, 42) provided in the banknote storages (30), a banknote storage cassette (40)) in the storage unit.