Adjustable Trailing-End Fences for Uniform Staple Depth
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Solution Overview
Problem
Conventional sheet processing apparatuses face challenges in aligning binding positions in the sub-scanning direction due to mechanical errors during assembly, leading to uneven binding depths when binding sheets from different sides.
Innovation Solution
A sheet processing apparatus with movable alignment members and a position changing unit that adjusts the alignment of trailing-end reference fences in the sheet conveying direction, ensuring equal binding positions for front-side and back-side binding by changing the relative positions of these members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the trailing-end reference fences are fixed in position, then the structure is simple and easy to manufacture, but the binding positions cannot be adjusted in the sheet conveying direction
Solution Approach 1:
The reference fences are made movable in the sheet conveying direction through a driving mechanism that shifts their positions dynamically. This allows the system to adapt to different binding positions while maintaining a relatively simple overall structure, resolving the contradiction between adjustability and complexity.
Solution Approach 2:
The position parameter of the reference fences is made variable through the driving mechanism. By changing the positional parameter of the reference fences in the sheet conveying direction, the system achieves binding position adjustment without requiring a completely complex reconfigurable structure.
2Manufacturing precision
If the pressing amount of leading-end stoppers is made variable, then some alignment adjustment is possible, but the inclination of sheets cannot be eliminated when positional deviations exist
Solution Approach 1:
Instead of varying the pressing amount of leading-end stoppers, the invention makes the reference fences themselves movable in position. This dynamic positioning approach eliminates sheet inclination caused by assembly deviations more effectively while avoiding the complexity of variable pressing mechanisms.
Solution Approach 2:
The invention uses a symmetric pair of reference fences that can be independently positioned. By coordinating the positions of the front and back reference fences, the system compensates for assembly deviations and eliminates sheet inclination, achieving higher alignment precision without complex pressing mechanisms.
3Manufacturing precision
If front and back trailing-end reference fences have positional deviations, then assembly errors are introduced, but the binding depths become unequal in the conveying direction
Solution Approach 1:
The system detects the positional relationship between the front and back reference fences and uses this feedback information to adjust their positions independently. This feedback mechanism compensates for assembly errors and ensures equal binding depths, maintaining manufacturing precision while keeping the assembly process relatively simple.
Solution Approach 2:
The positions of the front and back reference fences are made independently adjustable through the driving mechanism. By changing the position parameters of each reference fence based on their relative relationship, the system compensates for assembly deviations and achieves aligned binding depths without complicating the assembly process.
Data Source
AI summary
A sheet processing apparatus is disclosed which includes front and back trailing-end reference fences that are movable and on which the sheet trailing-end abuts to align the sheet trailing-end; a side-stitching stapler that moves along the sheet trailing-end and binds a bundle of sheets aligned; a length-direction moving mechanism that moves the trailing-end reference fences in a sheet conveying direction; and a position changing unit that drives the length-direction moving mechanism to change the position of one of the trailing-end reference fences in the sheet conveying direction relative to the position of the other one. The front and back trailing-end reference fences are moved to change binding positions such that the distances from the sheet trailing-end to staple positions are made equal in front-side binding and in back-side binding.