Sheet Loading Device Single Drive Pressing Restriction
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Solution Overview
Problem
Existing sheet loading devices for post-processing apparatuses face issues with curls in recording sheets causing rear ends to depart from the tray, leading to transport path blockages and disrupted loading order, and current solutions involving separate drive mechanisms for pressing and claw members increase device costs.
Innovation Solution
A sheet loading device with a guide member that moves between positions to press the rear end of recording sheets against the tray and a restriction member that is biased to prevent departure, using a single drive source to manage both functions, ensuring smooth loading and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate drive mechanisms are used for the pressing member and claw member, then the recording sheets can be reliably pressed and restricted at different timings, but the device cost increases
Solution Approach 1:
The patent combines the pressing member and claw member into a single integrated assembly that is driven by a single drive mechanism. The pressing member and claw member move together as one unit, allowing both functions to be performed simultaneously while reducing the number of drive sources from two to one, thereby lowering device cost while maintaining operational reliability
Solution Approach 2:
The integrated assembly serves multiple functions: the pressing member presses the recording sheet against the tray surface, the claw member restricts the rear end of the sheet, and both actions are coordinated through a single drive mechanism. This multi-functional design eliminates the need for separate drive systems while achieving the same operational goals
2Device complexity
If the rear end of curled recording sheets is not restricted, then the device structure remains simple, but the transport path gets blocked and loading order is disrupted
Solution Approach 1:
The integrated pressing and restriction assembly is positioned to act on the recording sheet before it fully enters the transport path. By pressing the sheet against the tray and restricting its rear end in advance, the system prevents curling and blocking issues before they occur, ensuring smooth transport and correct loading order
Solution Approach 2:
The integrated assembly acts as an intermediary mechanism between the sheet feeding system and the transport path. It mediates the potential problem of sheet curling by providing both pressing and restriction functions, ensuring that sheets are properly positioned and restrained before entering the transport path, thus preventing blocking and maintaining loading order
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 prevents rear ends of recording sheets from blocking the transport path, maintains the loading order, and significantly reduces device costs by utilizing a single drive source for both the guide and restriction mechanisms.
Implementation Method 1
a bias mechanism configured to apply a bias force to bias the restriction member towards the third position from the fourth position
Data Source
AI summary
A sheet loading device that includes a tray having a sheet loading surface, transports sheets one by one to the tray along a transport path, and loads the sheets one by one onto the sheet loading surface, comprising: a guide member for guiding a sheet to the tray along the transport path; a drive member; a restriction member; and a bias mechanism. Along a course of movement for pressing a loaded sheet against the sheet loading surface, the guide member engages with the restriction member, causes the restriction member to move to a position for restricting forming of a curl on the loaded sheet, and thereby prevents the transport path from being blocked by the curl. When the engagement between the guide member and the restriction member is released, the restriction member returns to an initial position by bias force applied by the bias mechanism.