Sheet Conveying Device Rotary Detection Mechanism
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Solution Overview
Problem
Existing sheet conveying devices require multiple detectors and components to accurately detect sheet presence and size, leading to increased costs and complexity.
Innovation Solution
A sheet conveying device with a sheet loader, feeder, optical sensor, and rotary member that detects sheet presence and size using a single optical sensor and rotary member, reducing the number of parts and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detectors are used to detect sheet presence and size, then detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple detection functions into a single detector by integrating a rotary member with detection targets at different positions. The rotary member rotates to present different detection surfaces to the single detector, enabling it to perform both sheet presence detection and sheet size detection that would otherwise require multiple separate detectors.
Solution Approach 2:
The single detector is made multi-functional through the rotary member mechanism. The detector can detect both the presence of sheets and determine sheet sizes by receiving light or no light signals when the rotary member rotates to different positions, making one component perform multiple detection tasks.
2Measurement precision
If multiple detectors are used to detect sheet presence and size, then detection accuracy is improved, but cost increases
Solution Approach 1:
The patent merges multiple detection functions into a single detector system, eliminating the need for multiple separate detectors. This consolidation reduces component quantity and associated costs while maintaining accurate sheet presence and size detection capabilities through the rotary member's multi-position detection targets.
3Device complexity
If a single optical sensor and rotary member are used, then device complexity is reduced, but detection capability must be maintained
Solution Approach 1:
The patent introduces dynamic rotation of the rotary member to enable a single stationary detector to access multiple detection targets at different positions. This dynamic mechanism allows the simplified single-detector system to maintain comprehensive detection capabilities for both sheet presence and size without requiring multiple fixed detectors.
Solution Approach 2:
The rotary member acts as an intermediary between the single optical sensor and the multiple detection requirements. It transfers the detection function to different spatial positions by rotating, allowing one sensor to effectively monitor multiple locations and conditions that would otherwise require multiple sensors.
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 solution effectively detects sheet presence and size with reduced components, enhancing accuracy and lowering costs while maintaining efficient sheet handling.
Implementation Method 1
The optical sensor is configured to detect the sheet at a predetermined position on the sheet loader in a width direction of the sheet and at a predetermined position in a sheet conveyance passage in the width direction of the sheet
Data Source
AI summary
A sheet conveying device includes a sheet loader, a sheet feeder, an optical sensor, and a rotary member. The sheet loader is configured to load a sheet. The sheet feeder is configured to feed the sheet loaded on the sheet loader. The optical sensor is configured to detect the sheet at a predetermined position on the sheet loader in a width direction of the sheet and at a predetermined position in a sheet conveyance passage in the width direction of the sheet. The rotary member is configured to rotate to a first position when the sheet is not at the predetermined position on the sheet loader and a second position when the sheet is at the predetermined position. The rotary member has a detection target portion configured to be detected by the optical sensor when the rotary member is located at the first or second position.