Sheet Pressing Apparatus with Guide Portion for Buckling Prevention
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Solution Overview
Problem
Conventional sheet pressing apparatuses require increased size and processing time due to the need to move pressing rollers away from the folding sheet to prevent buckling, which decreases productivity and increases costs.
Innovation Solution
A sheet pressing apparatus with a carry-in port, a pressing roller, a nipping roller, and guide portions that position the fold line at the pressing surface, allowing the rollers to move along the fold line without needing to retract significantly, thus maintaining efficiency and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressing roller is moved to a standby position sufficiently separated from the folding processed sheet in the thickness direction to prevent buckling, then the sheet buckling problem is solved, but the distance for the pressing roller to move during additional folding processing increases, causing the entire apparatus to be increased in size and the time required for the additional folding process to be increased
Solution Approach 1:
A guide portion is introduced as an intermediary component between the sheet conveyance path and the pressing roller. This guide portion guides the fold line part of the sheet to the pressing surface, eliminating the need for the pressing roller to retract significantly from the sheet during conveyance. The guide portion acts as a mediator that enables close proximity operation while preventing sheet buckling, thus resolving the contradiction between reliability and productivity.
2Reliability
If the pressing roller is moved to a standby position sufficiently separated from the folding processed sheet in the thickness direction to prevent buckling, then the sheet buckling problem is solved, but the entire apparatus is increased in size
Solution Approach 1:
The guide portion serves as a space-efficient intermediary that enables the pressing roller to operate in close proximity to the sheet conveyance path without causing buckling. By guiding the fold line part to the pressing surface, the guide portion eliminates the need for large clearance space in the thickness direction, thus preventing apparatus size increase while maintaining reliability.
3Reliability
If the pressing roller is moved to a standby position sufficiently separated from the folding processed sheet in the thickness direction to prevent buckling, then the sheet buckling problem is solved, but the distance for the pressing roller to move during additional folding processing increases
Solution Approach 1:
The guide portion is positioned between the sheet and the pressing roller to enable minimal movement distance for the pressing roller. By guiding the fold line part to the pressing surface, the guide portion allows the pressing roller to remain in close proximity to the sheet during conveyance, significantly reducing the movement distance required for additional folding processing while preventing buckling.
Data Source
AI summary
The present invention is to provide an image forming system including a sheet folding processing apparatus and a sheet pressing apparatus capable of performing additional folding processing without decreasing productivity. The sheet pressing apparatus of the present invention includes a pressing roller including a pressing surface configured to press a fold line part of a folding processed sheet conveyed from a carry-in port in a thickness direction of the sheet and a guide portion configured to guide the folding processed sheet so that the fold line part is positioned at the pressing surface, a nipping member configured to nip the fold line part between the pressing surface and the nipping member, a first moving unit configured to move the pressing roller to a nipping position at which the fold line part is nipped between the nipping member and the pressing surface of the pressing roller and a retracting position.