Sheet Stacker Guide Lines for High-Speed Conveyance Stability
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Solution Overview
Problem
The increase in sheet conveyance rate for improved productivity leads to conveyance failures due to the leading end of the sheet rising and being caught by the upper structure, particularly in low-rigidity sheets.
Innovation Solution
A sheet stacker design with a guide that includes multiple lines extending in the conveyance direction above the guide path, inclined relative to the conveyance direction, to restrict the rising of the sheet's leading end and prevent it from being caught by the upper structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sheet conveyance rate is increased to improve productivity, then the output per unit time is improved, but conveyance failure occurs due to the leading end of the sheet rising and being caught by the upper structure
Solution Approach 1:
The patent introduces lines as intermediary elements between the guide and the upper structure. These lines act as mediators that prevent the sheet's leading end from rising and being caught by the upper structure, thereby enabling high-speed conveyance without conveyance failure
Solution Approach 2:
The patent changes the physical parameters of the guide system by adding lines at specific positions and angles. This modifies the constraint conditions on the sheet, allowing it to be conveyed at higher speeds without rising and causing conveyance failure
2Productivity
If the sheet conveyance rate is increased to improve productivity, then the output per unit time is improved, but conveyance failure occurs
Solution Approach 1:
The lines serve as intermediary elements that stabilize the sheet during high-speed conveyance. By positioning these lines above the guide path, they prevent the sheet from rising and being caught by the upper structure, ensuring stable operation at high productivity levels
3Reliability
If the blower blows air downward to the sheet, then the sheet conveyance is stabilized, but the leading end of the sheet may still rise and be caught by the upper structure at high conveyance rates
Solution Approach 1:
The patent adds lines that extend in a direction inclined relative to the conveyance direction, creating a new dimensional constraint. This inclined configuration prevents the sheet's leading end from rising in the vertical dimension while allowing high-speed horizontal conveyance
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 conveyance failures by stabilizing the sheet's landing pose, enhancing productivity and ensuring stable sheet conveyance.
Implementation Method 1
a blower disposed above the guide path of the guide to blow air downward to the sheet
Data Source
AI summary
A sheet stacker includes: a loader to which a sheet bundle is to be loaded; a guide to receive a leading end of a sheet conveyed to an area above the loader, and guide the sheet along a guide path above the loader in a conveyance direction; a blower disposed above the guide path of the guide to blow air downward to the sheet; and multiple lines: disposed above the guide path of the guide; and extending in a direction inclined relative to the conveyance direction.