Post-Processing Device S-Shaped Transport Path Crease Formation
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Solution Overview
Problem
Current post-processing devices for image forming apparatuses face challenges in efficiently processing and handling recording media, particularly in forming creases and cutting, due to limitations in transport path design and processing unit placement, which can lead to inefficiencies and potential jamming issues.
Innovation Solution
The device incorporates a unique S-shaped transport path with dedicated crease forming and cutting units, featuring rotatable blocks for crease direction control and dual cutting units with rotary cutters and pressing mechanisms, along with loop absorption units to prevent jamming, enabling precise crease formation and cutting while accommodating unnecessary media portions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional linear transport path is used, then the device structure is simple, but processing efficiency decreases and jamming issues occur
Solution Approach 1:
The transport path is designed with S-shaped curved sections instead of linear segments. The curved transport path allows recording media to follow a smooth trajectory through the processing units, preventing abrupt directional changes that cause jamming while maintaining continuous material flow for efficient processing.
Solution Approach 2:
The transport path transitions from a two-dimensional planar layout to a three-dimensional S-shaped configuration with vertical and horizontal components. This spatial arrangement allows multiple processing operations to occur in sequence without requiring excessive horizontal space, improving productivity while managing device footprint.
2Productivity
If processing units are densely arranged, then processing capacity increases, but media jamming increases
Solution Approach 1:
Curved transport sections provide gradual transitions between processing units, allowing media to navigate tight spaces without abrupt stops or sharp angles that would cause jamming. The curvature radius is optimized to maintain media tension while preventing contact between adjacent processing components.
Solution Approach 2:
The transport path is divided into distinct segments with dedicated functions (crease forming section, cutting section, transport sections). Each segment is optimized for its specific operation, allowing high-density arrangement of processing units while maintaining sufficient clearance through the S-shaped routing that prevents media interference between segments.
3Adaptability or versatility
If the transport path is extended to accommodate multiple processing units, then processing functionality increases, but media tension control becomes difficult
Solution Approach 1:
The S-shaped curved path creates natural tension distribution along the media length. The curvature sections act as tensioning zones that maintain consistent media tension throughout the extended transport path, preventing slack formation while accommodating multiple processing units at different positions.
Data Source
AI summary
Provided is a post-processing device including a transport path that includes a first transport path which is bent in one direction and a second transport path which is continuous from the first transport path and is bent in the other direction, and that is directed vertically downward while being bent, a first processing unit that is disposed in the first transport path, a second processing unit that is disposed in the second transport path, and a third transport path that is continuous from the second transport path and that is directed vertically upward.