Paper Sheet Processing Apparatus Upward Pressing Mechanism
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Solution Overview
Problem
Conventional paper sheet post-processing apparatuses generate noise and cause curling issues due to the forced bending of paper sheets, leading to instability in the stacking process.
Innovation Solution
A paper sheet processing apparatus with a standby tray and a press member that presses the rear end of a paper sheet along a first direction, using a feed member with a tab to support and a rotary unit to guide the paper sheet, ensuring stable stacking by preventing collision and maintaining the stacked position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the paddle is rotated by 180° to press down the rear end of the paper sheet each time a paper sheet is supplied to the sheet stock unit, then the paper sheets can be stocked in an orderly stacked state, but a relative large noise is generated and the rear end of the paper sheet is curled causing instability in the stacking process
Solution Approach 1:
Instead of pressing down the rear end of the paper sheet from above using a rotating paddle, the invention presses the rear end of the paper sheet from below using a press member that moves upward. This inverted approach achieves the same stacking stabilization effect while avoiding the noise and curling problems caused by downward pressing.
Solution Approach 2:
The invention changes the pressing direction parameter from downward (conventional) to upward (invention). By altering the direction parameter of the pressing action, the invention maintains the functional effect of stabilizing paper sheets during stacking while eliminating the harmful side effects of noise generation and paper curling.
2Reliability
If the rear end of the paper sheet is forcibly bent downward from the conveying path each time a paper sheet is stacked, then the paper sheets can be prevented from colliding, but the rear end of the paper sheet is curled when supplied to the processing tray
Solution Approach 1:
Instead of bending the paper sheet rear end downward from the conveying path, the invention presses the rear end upward from below. This inverted pressing direction prevents collision between paper sheets while maintaining the paper sheet's original shape and preventing curling.
Solution Approach 2:
The press member acts as an intermediary that presses the paper sheet rear end from below rather than forcing it downward. This intermediary action achieves collision prevention without directly deforming the paper sheet shape, thereby avoiding curling.
3Stability of the object's composition
If a paddle is used to press down the rear end of the paper sheet in the conveying direction, then the paper sheets can be stacked in an orderly state, but the position of the already stacked paper sheet is disturbed by collision with the next supplied paper
Solution Approach 1:
Instead of pressing down from above which can disturb the stacked paper position, the invention presses upward from below. This inverted approach maintains orderly stacking while preserving the positional accuracy of already stacked paper sheets by avoiding downward displacement forces.
Data Source
AI summary
A post-processing method involves using a standby tray to receive a paper sheet to be supplied from a digital copier, a processing tray to receive a paper sheet dropped from a standby tray, a feed member which guides the rear end of a paper sheet received in a standby tray in the feeding direction to a processing tray, and scrapes and sends the rear end of a paper sheet dropped onto a processing tray to a stopper, a press member which clamps the rear end of a paper sheet received in a standby tray by cooperating with two feed members, and a stapler to staple the aligned rear ends of paper sheets. When a first paper sheet is supplied to the standby tray, the press member presses the rear end of the first paper sheet, to receive a second paper.