Sheet Type Determining Device with Arc Regulators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet type determining devices face challenges in accurately identifying sheet types, especially with thin paper, due to issues like sheet jams caused by excessive pressure contact and inadequate regulation of conveyance position, leading to erroneous determinations and reduced productivity.
Innovation Solution
A sheet type determining device with a guide and regulators that protrude in an arc shape from the guide surfaces, regulating the displacement range between the guides to stabilize the sheet's position at the detection point, allowing non-contact determination using light sensors for accurate sheet type identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressing member applies pressure contact to the sheet guide to regulate sheet position, then the positional relationship between the sensor and sheet is stabilized, but sheet jams occur when thin paper is used due to excessive pressure contact force
Solution Approach 1:
The pressing member is designed to move in the sheet conveyance direction rather than applying static pressure contact. This dynamic movement allows the member to guide thin sheets without exerting excessive force that would cause jams, while still regulating sheet position sufficiently for accurate sensor detection
Solution Approach 2:
Instead of applying pressure in the direction perpendicular to the sheet surface (which causes jams with thin paper), the pressing member exerts force in the sheet conveyance direction (longitudinal dimension). This dimensional change allows position regulation without compromising sheet conveyance reliability
2Stability of the object's composition
If pressure contact force between pressing member and sheet guide is excessive, then sheet position is regulated, but thin paper cannot enter between the pressing member and sheet guide causing sheet jam
Solution Approach 1:
The pressing member moves dynamically in the conveyance direction rather than maintaining static pressure contact. This allows the member to guide sheets into position while minimizing continuous force application that would prevent thin sheets from entering the conveyance path
3Reliability
If pressure contact force between pressing member and sheet guide is insufficient, then sheet jam is prevented, but conveyance position of thick paper cannot be fully regulated causing erroneous determinations
Solution Approach 1:
The pressing member's dynamic movement in the conveyance direction provides sufficient guidance for thick papers without requiring excessive pressure contact force. The motion-based guidance mechanism ensures accurate sheet positioning for sensor detection while maintaining reliability across different paper types
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
This configuration enhances the accuracy of sheet type determination while preventing sheet jams, ensuring reliable operation even with thin paper, and maintaining productivity by stabilizing the positional relationship between the sheet and sensors.
Implementation Method 1
a light emitting element and a light receiving element, the light receiving element receiving light reflected from the sheet
Implementation Method 2
the light receiving element receiving light transmitted through the sheet
Data Source
AI summary
A sheet type determining device including a guide that guides a sheet along a sheet conveyance path to a destination. The sheet conveyance path is between a first guide surface and a second guide surface facing each other across an interval. The sheet type determining device further includes a determiner that determines a sheet type when the sheet is in the sheet conveyance path, without having contact with the sheet in conveyance, and one or more regulators that regulate a displacement range of the sheet at a determining position, the displacement range being in a direction of the interval of the first and the second guide surfaces. Each of the regulators is a member that protrudes in an arc shape from the first or the second guide surface toward the guide surface opposite, and is spaced from the guide surface or another one of the regulators opposite.