Sheet Processing Apparatus Vertical Conveyance Stability
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Solution Overview
Problem
Conventional methods for conveying saddle-stitched booklets in a vertical state to prevent edge misalignment and falling during edge trimming reduce productivity due to the need for low conveyance speeds.
Innovation Solution
A sheet processing apparatus with a supporting section that hangs the folded booklet from below, a conveyance section that moves the booklet orthogonally to the folding line, and pressing sections that maintain the booklet's position during conveyance, allowing for faster processing without shifting the folding line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the saddle-stitched booklet is merely placed on the saddle-shaped placement section, then the structure is simple, but the conveyance speed needs to be extremely low to prevent falling down and folding line shifting, reducing productivity
Solution Approach 1:
The pressing section presses the saddle-stitched booklet onto the saddle-shaped placement section before conveyance begins, and continues pressing during the initial phase of conveyance. This preliminary and continuous pressing action prevents the booklet from falling down or shifting during the conveyance process, allowing for higher conveyance speeds without compromising stability
Solution Approach 2:
The pressing section is designed to move dynamically with the conveyance process - it presses the booklet during conveyance and then retreats after conveyance is complete. This dynamic operation allows the system to maintain booklet stability during motion while enabling faster conveyance speeds compared to static placement methods
2Productivity
If the conveyance speed is increased to improve productivity, then output increases, but the saddle-stitched booklet may fall down or the folding line may shift during conveyance
Solution Approach 1:
The pressing section is activated before and during the conveyance operation to secure the booklet in place. This preliminary securing action ensures that even at higher conveyance speeds, the booklet maintains its position and the folding line remains stable, making the operation easier to control
Solution Approach 2:
The pressing section acts as an intermediary between the booklet and the conveyance system. By applying pressure through this intermediary element, the system can control the booklet's position during conveyance more effectively, enabling faster speeds while maintaining ease of operation
Data Source
AI summary
A sheet processing apparatus including: a supporting section over which a sheet is hung to be supported from below, the sheet being folded in a mountain shape with a folding line formed at a central portion; a conveyance section which conveys the sheet supported by the supporting section in a direction orthogonal to the folding line in a horizontal plane including the folding line; a control section which controls a sheet conveyance operation by the conveyance section; a first pressing section which presses the folding line of the sheet supported by the supporting section from above; and a second pressing section which presses the sheet from a rear side in an advancing direction when the conveyance section conveys the sheet.