Pick-Up Bracket Rotation for Skew Correction in Media Dispensers
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Solution Overview
Problem
Existing automatic media dispensers face issues where a skewed medium interferes with the pick-up roller when conveyed in reverse direction to correct skew, leading to potential folding or crumpling and jamming.
Innovation Solution
A media separating device with a pick-up bracket that rotates away from the push plate when a skew is detected, using an interlocking mechanism involving a one-way bearing and reverse conveying gear to prevent interference, and a skew detecting sensor to control the rotation of rollers for reverse conveying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the feed roller is rotated in reverse direction to convey skewed medium back for re-positioning, then the medium can be re-aligned properly, but the medium interferes with the pick-up roller causing folding or crumpling
Solution Approach 1:
The pick-up bracket is made rotatable relative to the media box, allowing it to dynamically adjust its position. During reverse conveyance of skewed medium, the bracket rotates away from the push plate to prevent interference, then returns to its original position after the medium is re-aligned, thus preventing folding while maintaining alignment capability
Solution Approach 2:
The system detects medium skew beforehand using a sensor before reverse conveyance begins. The pick-up bracket is rotated away from the push plate in advance of the reverse conveyance action, preemptively eliminating the interference condition that would cause folding or crumpling
2Object-affected harmful factors
If the pick-up bracket is rotated away from the push plate during reverse conveying, then medium interference is prevented, but the device complexity increases
Solution Approach 1:
The rotation control of the pick-up bracket is merged with the existing reverse conveyance control system. The interlocking mechanism uses the same sensor that detects medium skew and the same control signals that drive reverse conveyance to also control the bracket rotation, thereby preventing interference without adding independent control systems
Solution Approach 2:
A pick-up bracket interlocking mechanism serves as an intermediary between the push plate and the pick-up roller. This intermediate structure with rotatable bracket and interlocking gear provides a mechanical solution that prevents direct interference while maintaining the simplicity of the overall system architecture
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 medium interference and folding by rotating the pick-up bracket away from the push plate during reverse conveying, ensuring smooth re-introduction into the media box and preventing jamming.
Implementation Method 1
an interlocking means for rotating the pick-up bracket in a direction away from the push plate in response to rotation of a feed roller shaft provided with the feed roller when a skew of the medium is detected and the feed roller is rotated in the direction reverse to a direction in which the medium is conveyed. The interlocking means comprises a one-way bearing provided on the feed roller shaft and rotated together with the feed roller shaft only when the feed roller shaft is rotated in the reverse direction of the medium
Implementation Method 2
a feed roller being in close contact with one surface of the medium to convey the medium by frictional force
Implementation Method 3
The conveying bearing 16 is elastically supported by a spring 18. The spring 18 provides the elastic force in a direction in which the conveying bearing 16 is brought into close contact with the medium m
Data Source
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AI summary
The present invention relates to a media separating device of an automatic media dispenser. In the present invention, a pick-up bracket 34 is rotatably provided so that it is pushed by a push plate 32 for pushing media received in a media box 30. A pick-up roller 38 is rotatably installed to the pick-up bracket 34 to pick up and convey the medium. In addition, a skew of the medium picked up by the pick-up roller 38 is detected by a skew detecting sensor 80. The media picked up by the pick-up roller 38 is separated one by one by a feed roller 50 and a contra-roller 60. The present invention is provided with an interlocking means for rotating the pick-up bracket 34 in a direction away from the push plate 32 in response to rotation of a feed roller shaft 50' provided with the feed roller 50 when a skew of the medium is detected and the feed roller 50 is rotated in a direction reverse to a direction in which the medium is conveyed. According to the present invention, there is an advantage in that when a skew of the medium is detected and the medium on which a skew occurs is conveyed in the reverse direction and then introduced into the media box, a folding or crumpling of an end of the medium caused by interference with the pick-up roller can be prevented, whereby making it possible to prevent the media from being jammed.