Document Conveying Tray With Integrated Lifting Wall Restraint
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Solution Overview
Problem
The challenge in document conveying devices is the potential falling off of the lifting wall part due to external forces like vibration, which can increase costs and complicate assembly, while existing solutions to prevent this often lead to increased component count and complexity.
Innovation Solution
A document conveying device with a sheet feeding tray, discharge tray, lifting mechanism, fixed wall part, and lifting wall part, where the discharge tray includes lowering restriction parts to prevent the lifting wall part from falling off, using a biasing member to maintain the lifting wall part's position and engagement parts for easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lifting wall part is made movable to enable the sheet feeding tray to be lifted and lowered, then the capacity of the sheet feeding tray can be adjusted, but the lifting wall part may fall off due to external forces such as vibration
Solution Approach 1:
The discharge tray includes lowering restriction parts that prevent the lifting wall part from falling off due to external forces such as vibration. This preliminary protective measure counteracts the potential harmful effect before it occurs, allowing the lifting wall part to remain movable for capacity adjustment while preventing it from detaching during operation.
2Reliability
If parts are added to prevent the falling off of the lifting wall part, then the reliability improves, but the cost increases
Solution Approach 1:
The lowering restriction parts are integrated into the discharge tray structure rather than being separate components. This merging of functions allows the discharge tray to simultaneously serve its primary purpose of collecting documents and the secondary purpose of restraining the lifting wall part, thereby improving reliability without increasing the number of parts or manufacturing cost.
3Reliability
If a structure is provided to prevent the lifting wall part from falling off, then the reliability improves, but the easiness of assembly may be impaired
Solution Approach 1:
By integrating the lowering restriction parts into the discharge tray structure, the design avoids adding separate assembly steps for installing restraint mechanisms. The discharge tray is assembled in its normal configuration, and the lowering restriction parts automatically provide the necessary constraint function, maintaining ease of assembly while ensuring reliability.
4Quantity of substance
If the sheet feeding tray capacity is increased, then more documents can be stored, but the device size increases
Solution Approach 1:
The lifting wall part is designed to be movable, allowing the sheet feeding tray capacity to be dynamically adjusted by lifting or lowering the tray. This dynamic configuration enables the system to accommodate varying document storage needs without requiring a permanently large device structure, as the capacity can be optimized based on actual usage requirements.
Data Source
AI summary
A document conveying device includes a sheet feeding tray, a sheet feeding mechanism, a discharge tray, a sheet feeding tray lifting mechanism, a top plate, a fixed wall part, and a lifting wall part. The discharge tray is provided below the sheet feeding tray. The top plate is adjacent to the sheet feeding tray on a downstream side in the sheet feeding direction. The fixed wall part is provided extending downward from an upstream side end portion of the top plate in the sheet feeding direction, and is fixed. The lifting wall part is provided extending upward from a downstream side end portion of the sheet feeding tray in the sheet feeding direction, and lifted and lowered together with the sheet feeding tray. The discharge tray includes a lowering restriction part which comes into contact with the lifting wall part to restrict a lowering of the lifting wall part.