Transport Belt Web Wiping Control for Longer Cleaning Life
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Solution Overview
Problem
Existing liquid discharge apparatuses face a trade-off between increasing the size of the cleaning mechanism to extend web life and increasing the frequency of web replacement, leading to user burden.
Innovation Solution
A liquid discharge apparatus with a cleaning mechanism that includes a web abutting against the transport belt and a driving section to change the wiping surface a predetermined number of times within a cleaning period, effectively extending web life without increasing apparatus size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the total length of the web is increased to extend its life, then the web life is extended, but the cleaning mechanism becomes larger
Solution Approach 1:
The patent applies dynamics by making the web sending operation adjustable and controllable. The control unit dynamically determines when to send the web based on real-time detection of liquid accumulation on the transport belt, rather than using a fixed continuous sending mechanism. This allows the system to extend web life by sending the web only when necessary, while maintaining effective cleaning functionality.
Solution Approach 2:
The patent changes the parameter of web sending frequency and timing based on detected cleaning needs. The control unit adjusts the web sending operation from continuous or fixed-interval to variable-interval based on liquid detection results. This parameter change allows the same web to serve longer without increasing mechanism size, as the web is sent selectively rather than continuously.
2Volume of moving object
If the total length of the web is shortened to reduce apparatus size, then the apparatus size is reduced, but the web life is shortened and replacement frequency is increased
Solution Approach 1:
The patent implements self-service through the detection unit that automatically monitors liquid accumulation on the transport belt and triggers web sending only when cleaning is actually needed. This self-regulating mechanism eliminates the need for manual intervention or fixed-time replacement schedules, allowing a shorter web to serve effectively longer by being replaced only when genuinely necessary based on detected cleaning requirements.
Solution Approach 2:
The detection unit provides feedback to the control unit about the actual cleaning state of the transport belt. This feedback loop allows the system to adjust web sending operations based on real-time conditions, extending the effective life of a shorter web by avoiding unnecessary replacements. The feedback mechanism ensures that web replacement is driven by actual cleaning needs rather than arbitrary time intervals.
3Reliability
If the web is sent continuously to maintain a new wiping surface, then cleaning effectiveness is maintained, but the web life is reduced and replacement frequency is increased
Solution Approach 1:
The patent transitions from continuous web sending to periodic web sending based on detected cleaning needs. Instead of continuously sending the web to maintain a fresh surface, the system periodically sends the web only when the detection unit identifies liquid accumulation that requires cleaning. This periodic action maintains cleaning effectiveness while significantly extending web life by avoiding unnecessary sending operations.
Solution Approach 2:
The patent applies partial action by sending the web only to the extent necessary to address detected liquid accumulation, rather than continuously sending it regardless of actual need. The control unit determines the appropriate web sending amount and timing based on detection results, using just enough web sending to achieve effective cleaning without excessive action that would waste web material and reduce web life.
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 approach maintains the cleaning effectiveness of the transport belt while reducing the frequency of web replacement, thus optimizing maintenance efficiency and user convenience.
Implementation Method 1
a web (66) that abuts against the transport belt (27) and wipes off the liquid on the transport belt (27)
Data Source
AI summary
A liquid discharge apparatus includes a transport belt that transports a medium, a discharge section that discharges a liquid to the medium transported by the transport belt, a cleaning mechanism that cleans the transport belt, and a control section that controls the cleaning mechanism. The cleaning mechanism includes a web that abuts against the transport belt and wipes off the liquid on the transport belt, and a driving section that changes a wiping surface of the web that abuts against the transport belt. The control section performs a first operation of changing the wiping surface of the web that abuts against the transport belt a predetermined number of times within a cleaning period for cleaning the transport belt.