Medium Feeding Device Suppression Unit for Accurate Paper Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the post-feeding period, media movement downstream in the delivery direction is not effectively suppressed when air is blown towards a stored media stack, which can lead to decreased feeding accuracy if a new feeding job instruction is provided before the media settles.
Innovation Solution
A medium feeding device with a suppression unit that includes a stopper wall or a raising/lowering mechanism to prevent media from advancing towards the delivery unit side during air blowing, using air separation mechanisms or vacuum suction to maintain media position, ensuring accurate feeding when the next job instruction is given.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If air is blown toward the stored media stack during the post-feeding period to fluff the media, then the media separation is improved, but the media moves downstream toward the delivery unit which decreases feeding accuracy
Solution Approach 1:
The suppression unit applies a counteracting force (downward air blowing or mechanical pressure) to prevent the harmful effect of media moving downstream during the post-feeding period, while allowing the fluffing unit to blow air upward for media separation. This preliminary anti-action resolves the contradiction by simultaneously achieving media separation and preventing downstream movement.
Solution Approach 2:
The air blowing function is segmented into two independent units: the fluffing unit that blows air upward to separate media, and the suppression unit that blows air downward or applies mechanical pressure to prevent downstream movement. This segmentation allows both functions to operate simultaneously without interfering with each other, resolving the contradiction between media separation and feeding accuracy.
2Stability of the object's composition
If air blowing is performed during the post-feeding period to maintain media fluffing, then media separation is maintained, but media continues to move downstream causing positioning errors
Solution Approach 1:
The suppression unit applies downward air blowing or mechanical pressure during the post-feeding period to counteract the downstream movement caused by upward air blowing, while the fluffing unit continues to maintain media fluffing. This preliminary anti-action ensures both media fluffing and accurate positioning are achieved simultaneously.
Solution Approach 2:
The suppression unit acts as an intermediary element that mediates between the fluffing unit's upward air blowing and the media's tendency to move downstream. By introducing this intermediary suppression force, the system achieves both media fluffing and accurate positioning without direct conflict.
3Productivity
If the feeding cycle is shortened to increase productivity, then output is improved, but media does not have sufficient time to settle after air blowing causing accuracy degradation
Solution Approach 1:
The suppression unit operates continuously during the post-feeding period alongside the fluffing unit, ensuring that media positioning is maintained throughout the entire feeding cycle. This continuous action allows the feeding cycle to be shortened without sacrificing accuracy, as the suppression force prevents downstream movement even during rapid cycling.
Solution Approach 2:
The suppression unit is activated in advance during the post-feeding period to prevent downstream movement before the next feeding operation begins. This preliminary action ensures media is properly positioned and settled, enabling shorter feeding cycles without accuracy degradation.
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
The suppression unit effectively prevents media movement during air blowing in the post-feeding period, maintaining feeding accuracy and ensuring smooth operation when transitioning to the next feeding job.
Implementation Method 1
a transfer unit that is disposed above the storage unit and that adheres by suction to each of the media stored in the storage unit and transfers the media to the delivery unit
Implementation Method 2
a fluffing unit that is disposed beside the media stored in the storage unit in a direction intersecting the medium delivery direction, and that fluffs an upper-side region of the media in a state of being separated by blowing air toward a side of the media
Data Source
AI summary
A medium feeding device includes a storage unit that stores media in a form of a sheet, a delivery unit that is disposed downstream in a medium delivery direction relative to the media stored in the storage unit and that delivers the media individually, a transfer unit that is disposed above the storage unit and that adheres by suction to each of the media stored in the storage unit and transfers the media to the delivery unit, and a fluffing unit that is disposed beside the media stored in the storage unit in a direction intersecting the medium delivery direction. The fluffing unit fluffs an upper-side region of the media in a state of being separated, by blowing air toward a side of the media during a feeding job of the media and during a post-feeding period that is a predetermined period after completion of the feeding job. The medium feeding device further includes a suppression unit that suppresses movement of the media toward the delivery unit side during air blowing performed by the fluffing unit in the post-feeding period.