Medium Discharge Device Push-Down Portion Catch Prevention
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Solution Overview
Problem
Medium processing apparatuses face issues with medium discharge, where the upstream end of the medium is caught on the processing tray or pulled back during discharge to a stacking tray, leading to incomplete transfer.
Innovation Solution
A medium discharge device with a push-down portion that deviates from the discharge section in the width direction, supporting the medium at an advanced position and pushing it down below the downstream end of the first medium receiving surface, and a support portion that displaces between retracted and advanced positions to prevent catching and ensure proper discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the medium is pushed out by a pushing member to discharge from the processing tray to the stacking tray, then the medium can be discharged, but the processed medium may be pulled back to the processing tray together with the pushing member and may not be properly discharged
Solution Approach 1:
The push-down portion is positioned laterally offset from the discharge section, pushing the medium in a direction perpendicular to the discharge direction. This lateral push-down action creates a dimensional change that prevents the medium from being pulled back by the returning pushing member, while still allowing forward discharge to the stacking tray.
Solution Approach 2:
The push-down portion acts as an intermediary element between the pushing member and the medium. By positioning it laterally offset and using it to push the medium down, it mediates the interaction to prevent the medium from being caught on the processing tray edge or pulled back, ensuring reliable discharge.
2Productivity
If the medium is discharged from the processing tray to the stacking tray, then the processed medium can be transferred, but the rear end of the processed medium may be caught on the processing tray and may not be properly discharged
Solution Approach 1:
Instead of pushing the medium directly forward in the discharge direction, the push-down portion pushes the medium laterally offset from the discharge section. This lateral push-down action in a different dimension ensures the medium clears the processing tray edge completely, preventing the rear end from being caught.
3Ease of operation
If a pushing member is used to discharge medium, then discharge function is achieved, but the pushing member may pull back the processed medium to the processing tray when returning
Solution Approach 1:
The push-down portion serves as an intermediary that modifies the interaction between the pushing member and the medium. By positioning it laterally offset, it prevents the pushing member from directly contacting and potentially pulling back the medium during its return stroke, while still achieving the discharge function.
Solution Approach 2:
The push-down portion operates in a lateral dimension offset from the discharge direction, creating a separation between the pushing member's return path and the medium's discharge path. This dimensional separation prevents the pushing member from pulling back the medium while maintaining discharge effectiveness.
Data Source
AI summary
A medium discharge includes a first tray having a first medium receiving surface, a second tray having a second medium receiving surface for receiving the medium discharged from the first tray, a discharge section that discharges the medium disposed on the first tray to the second tray, and a push-down portion that is located downstream of a downstream end of the first medium receiving surface in the medium discharge direction, and that is located at a place deviated from the discharge section in a width direction that is a direction intersecting with the medium discharge direction, and pushes down a part of an upstream end of the medium to be discharged in the medium discharge direction.