Sheet Processing Apparatus Regulating Folded Bundle Opening
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Solution Overview
Problem
Conventional sheet processing apparatuses face issues with misalignment and uneven cutting of folded sheet bundles due to frictional resistance and coefficient differences, leading to poor appearance and potential breakage during the saddle stitch binding process.
Innovation Solution
A sheet processing apparatus with a regulating portion to align the sheet bundle and a conveying portion that pushes the bundle from the upstream side, reducing misalignment and ensuring smooth conveyance by regulating the opening of the folded sheet bundle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pressing members are used to enhance the crease line of the sheet bundle, then the space between edges is prevented from opening, but smooth conveyance is interrupted by resistance and the sheet bundle may not be conveyed
Solution Approach 1:
The pressing guides are made movable rather than fixed, allowing them to dynamically adjust their position and pressing force based on the sheet bundle's characteristics. This enables the system to maintain edge alignment while reducing resistance to conveyance, resolving the contradiction between stability and ease of operation
Solution Approach 2:
The pressing force and position parameters of the pressing guides are made adjustable, allowing optimization for different sheet types and bundle configurations. This enables smooth conveyance while maintaining adequate edge alignment, resolving the contradiction between these two requirements
2Reliability
If a claw-shaped pushing member operates at the same speed as the conveying belts to push the sheet bundle, then conveyance is supported, but the front cover sheet may be advanced due to contact friction resulting in misalignment
Solution Approach 1:
The pushing member's speed is made dynamically adjustable rather than fixed at the same speed as conveying belts. By optimizing the pushing speed independently, the system can reliably convey the sheet bundle without causing excessive friction that would advance the front cover sheet and cause misalignment
Solution Approach 2:
The pushing speed parameter is optimized separately from the conveying belt speed, allowing independent control of conveyance reliability and alignment precision. This resolves the contradiction by finding the optimal pushing speed that ensures reliable conveyance without causing front cover sheet advancement
3Strength
If the front cover sheet has higher contact friction with conveying belts than inner sheets, then the front cover sheet is advanced during conveyance, but this causes protrusion from edges and poor appearance
Solution Approach 1:
Different friction characteristics are applied to different parts of the sheet bundle through the regulated opening structure. The pressing guides apply localized pressure to inner sheets without affecting the front cover sheet's friction characteristics, preventing differential advancement and edge misalignment
Solution Approach 2:
The regulated opening allows dynamic adjustment of how friction forces are distributed through the sheet bundle during conveyance. This prevents the front cover sheet from being disproportionately advanced due to higher friction, maintaining edge alignment precision while preserving necessary frictional grip
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 apparatus effectively conveys folded sheet bundles without misalignment, ensuring even cutting and reducing the risk of breakage, resulting in a better appearance and improved processing efficiency.
Implementation Method 1
the coefficient of friction between the conveying belts and the front cover of the sheet bundle T is low. Therefore, the sheet bundle T sometimes will not be conveyed due to its sliding
Data Source
AI summary
A conveying apparatus includes a regulating portion which regulates the opening of the folded sheet bundle, and a conveying portion which pushes the sheet bundle from an upstream side in a conveying direction in a state that the regulating portion regulates the opening of folded sheet bundle.