Downward-Sloped Sheet Delivery Surface for Curl Interference
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Solution Overview
Problem
Existing conveyance apparatuses face issues with sheet interference and order disruption due to sheet curling, which are not adequately addressed by complex sheet pressing mechanisms, leading to stockability problems.
Innovation Solution
A conveyance apparatus with a sheet conveyance path and delivery port design featuring an upstream and downstream upper surface portion, where the downstream portion is positioned lower than the upstream, combined with a sheet guiding frame and delivery rollers to prevent sheet interference with a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex sheet pressing mechanism is used to suppress sheet curl, then sheet warp suppression is improved, but device complexity increases
Solution Approach 1:
The invention changes the approach from suppressing sheet curl through complex mechanical pressing to utilizing gravitational force by designing the delivery port surface with a downward slope in the sheet conveyance direction. This dimensional change in surface geometry allows sheets to naturally follow the slope and prevents curl interference without requiring complex pressing mechanisms.
Solution Approach 2:
The invention changes the physical parameter of the delivery port surface from a flat or upward-sloping design to a downward-sloping design in the sheet conveyance direction. This parameter change in surface inclination angle allows sheets to be guided naturally by gravity, suppressing curl and improving reliability without increasing device complexity.
2Device complexity
If the delivery port surface is flat or upward-sloping, then structural simplicity is maintained, but sheet interference and stockability problems occur
Solution Approach 1:
The invention introduces a slope dimension to the delivery port surface, making it downward-sloping in the sheet conveyance direction. This dimensional change transforms the surface from a static flat structure to a dynamic guide that actively prevents sheet curl and interference, improving stockability while maintaining structural simplicity.
Solution Approach 2:
The downward-sloping surface creates a gravitational potential gradient that naturally guides sheets toward the delivery position. This equipotentiality principle uses gravity as a continuous guiding force, ensuring sheets follow the intended path without requiring additional mechanical intervention, thus improving reliability without complicating the structure.
3Device complexity
If sheet curl is not suppressed, then device complexity remains low, but sheet order and delivery accuracy deteriorate
Solution Approach 1:
The invention changes the delivery port surface inclination parameter to create a downward slope in the sheet conveyance direction. This parameter change ensures sheets maintain proper orientation and follow the intended path, improving delivery accuracy and sheet order without requiring complex conveyance systems.
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 sheet interference and allows for efficient stacking and delivery without complex mechanisms, enabling apparatus downsizing and maintaining sheet order.
Implementation Method 1
The downstream upper surface portion is located in a lower position than the upstream upper surface portion
Data Source
AI summary
A conveyance apparatus includes a sheet conveyance path, a delivery port, and a delivery upper surface portion. A sheet is conveyed on the sheet conveyance path. The sheet conveyed on the sheet conveyance path is delivered to the delivery port. The delivery upper surface portion is continuous with an upper surface of the sheet conveyance path and constitutes an upper surface of the delivery port. The delivery upper surface portion includes an upstream upper surface portion and a downstream upper surface portion. The upstream upper surface portion is located on an upstream side in a direction in which the sheet is conveyed. The downstream upper surface portion is located on a downstream side in the direction in which the sheet is conveyed. The downstream upper surface portion is located in a lower position than the upstream upper surface portion.