Movable End Stopper for Sheet Buckling Prevention
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Solution Overview
Problem
Existing sheet processing apparatuses face issues with sheet buckling and jamming due to excessive conveying force, particularly when handling sheets of varying lengths, leading to alignment failures and increased processing time.
Innovation Solution
A sheet processing apparatus with a storing portion inclined downstream, featuring first and second conveying members and a receiving member that can move along the conveying direction to prevent sheet buckling by adjusting the receiving position based on sheet length, ensuring proper alignment and reducing processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conveying force is excessively increased to reliably convey sheets into the stapler, then the sheet conveying reliability is improved, but the sheet buckles between the conveying roller and the end stopper, resulting in alignment failure
Solution Approach 1:
The end stopper is made movable along the conveying direction instead of being fixed, allowing its position to be dynamically adjusted based on sheet length. This enables the system to adapt conveying conditions for different sheet sizes, preventing buckling while maintaining reliable conveying and precise alignment.
Solution Approach 2:
The position parameter of the end stopper is changed according to sheet length. By adjusting the end stopper position to match different sheet sizes, the system optimizes the conveying distance and force distribution, preventing excessive warping and buckling while maintaining reliable sheet delivery to the stapler.
2Manufacturing precision
If the end stopper is brought close to the conveying roller to prevent sheet buckling, then sheet alignment is improved, but a sheet bundle needs to be conveyed a long distance to the binding position, increasing processing time
Solution Approach 1:
The end stopper position is dynamically adjusted based on sheet length rather than being fixed at a constant distance from the conveying roller. This allows the system to optimize both alignment precision and conveying distance for each sheet size, preventing excessive processing time while maintaining alignment quality.
Solution Approach 2:
The end stopper position parameter is varied according to sheet length. For longer sheets, the end stopper is positioned farther away, allowing adequate conveying distance without excessive buckling. For shorter sheets, it is positioned closer, maintaining alignment precision. This adaptive parameter adjustment resolves the contradiction between alignment and processing speed.
3Device complexity
If the end stopper position is fixed, then the apparatus structure is simple, but sheets of different lengths cannot be properly handled without buckling or excessive conveying distance
Solution Approach 1:
The end stopper is designed as a movable component that can be positioned at different locations along the conveying direction based on sheet length. This dynamic adjustment capability provides adaptability for handling various sheet sizes while maintaining relatively simple apparatus structure through a single movable component rather than multiple fixed positions.
Solution Approach 2:
The movable end stopper serves multiple functions: it prevents sheet buckling for long sheets by being positioned farther away, ensures proper alignment for short sheets by being positioned closer, and can be adjusted to match different sheet lengths. This single movable component replaces what would otherwise require multiple fixed positioning systems, providing versatility while maintaining structural simplicity.
Data Source
AI summary
A saddle stitching portion which can bind the center portion in the conveying direction of a sheet bundle by a stapler and fold it by a pair of folding rollers and a pushout member, includes an end stopper which receives the downstream end of a sheet conveyed by a first conveying roller in a first receiving position on the downstream of the first conveying roller by a length not buckling the sheet on the downstream of the stapler or the downstream end of the sheet conveyed by a second conveying roller in a second receiving position on the downstream of the second conveying roller by the length on the further downstream, wherein the receiving position of the downstream end stopper is selected according to the length in the conveying direction of the sheet.