Swingable Sheet Feeder Roller Replacement Mechanism
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Solution Overview
Problem
In conventional twin-roller sheet feeders, the spring clutch unit is fixed to the rotating shaft of the feed roller, making it difficult to replace the delivery roller and feed roller smoothly over time, as they wear out.
Innovation Solution
A sheet feeder design featuring a supporting member that can be swung using a drive source, with arms that pivot around an arm pivot, allowing the feed roller and separation roller to be replaced without removing the first arm from the pivot, facilitating easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring clutch unit is fixed to the rotating shaft of the feed roller, then the feed roller can be driven reliably, but the replacement of the delivery roller and feed roller becomes difficult and time-consuming
Solution Approach 1:
The arm is divided into a first arm and a second arm that can be separated from each other. The spring clutch unit is fixed to the first arm, while the feed roller and delivery roller are mounted on the second arm. This segmentation allows the rollers to be replaced by removing only the second arm, leaving the first arm with the spring clutch unit in place, thus improving replacement ease while maintaining driving reliability.
2Device complexity
If the arm is designed as a single integrated piece, then the structure is simple, but the rollers cannot be replaced without removing the entire arm from the pivot
Solution Approach 1:
The arm is segmented into two separable parts: the first arm that remains fixed to the pivot and contains the spring clutch unit, and the second arm that holds the rollers and can be quickly detached. This segmentation minimizes replacement time by allowing only the necessary second arm to be removed, while maintaining relatively simple structure through the straightforward connection and separation mechanism between the two arms.
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 design enables efficient and time-saving replacement of the rollers, as the arms can be separated and swung to allow access for maintenance, reducing downtime and maintenance complexity.
Implementation Method 1
a spring clutch unit 107 based on a twisted coil spring 113 which is twined on the input hub 111 and the output hub 112
Data Source
AI summary
A sheet feeder comprising: a feed roller which feeds sheet by rotating in contact with the sheet; a separation roller which is disposed at a downstream side of a sheet feeding direction; a supporting member which supports the feed roller and the separation roller, the supporting member is supported so as to be swingable around the rotation axis of the separation roller; a drive source which drives the supporting member so as to swing; an arm pivot which is disposed between the drive source and the supporting member; a first arm which is disposed at a side of the drive source; and a second arm which is disposed at a side of the supporting member, the second arm is able to be separated from the first arm; wherein the first arm and the second arm are integrally swung around the arm pivot by the drive source, thereby the supporting member swinging.