Sheet Processing Apparatus Aligning Unit Retraction
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Solution Overview
Problem
Conventional sheet processing apparatuses experience prolonged waiting times before sheets can be stacked due to inefficient alignment and conveying processes, leading to reduced productivity in producing sheet bundles.
Innovation Solution
A sheet processing apparatus with a conveying unit, a tray for stacking sheets, an aligning unit for aligning the front end of the sheet bundle, and a sheet bundle conveying unit that holds and conveys the rear end, where the aligning unit is retracted from the conveying path after aligning the front end and emerges behind the conveying unit to facilitate smoother sheet bundle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the front end of the sheet bundle is pushed toward the rear end fence side by using the rear surface of the discharge claw, then the rear end alignment accuracy is improved, but the waiting time until the sheet is put into the staple tray becomes long
Solution Approach 1:
The patent divides the alignment and conveying functions into separate units: an aligning unit for aligning the front end of sheet bundles and a sheet bundle conveying unit for conveying them. This segmentation allows each unit to operate independently and simultaneously, eliminating the sequential waiting time in conventional systems where one operation had to complete before the next began.
Solution Approach 2:
The aligning unit performs alignment of the front end of sheet bundles in advance, before the sheet bundle conveying unit begins its conveying operation. By preparing the alignment beforehand, the system eliminates idle waiting time and enables continuous operation, thereby improving productivity while maintaining alignment accuracy.
Solution Approach 3:
The patent ensures continuous operation by having the aligning unit and sheet bundle conveying unit work simultaneously and independently. The aligning unit prepares sheet bundles while the conveying unit transports them, and both operations can overlap in time. This continuous workflow eliminates idle periods and maximizes productivity without sacrificing alignment precision.
2Manufacturing precision
If the aligning unit remains in the conveying path during sheet bundle movement, then the alignment function is maintained, but the sheet bundle conveying is blocked
Solution Approach 1:
The aligning unit is designed to be movable, allowing it to dynamically change its position between the alignment position and the retracted position. This dynamic capability enables the aligning unit to move out of the conveying path when not actively aligning, thereby eliminating blockages and allowing smooth, uninterrupted sheet bundle conveying while maintaining alignment functionality when needed.
Solution Approach 2:
The patent resolves the spatial conflict between the aligning unit and sheet bundle conveying unit by positioning them in different spatial dimensions or locations. The aligning unit operates in one area while the conveying unit operates in another, allowing both functions to coexist without interference. This spatial separation enables simultaneous operation without blockages.
Data Source
AI summary
An aligning unit aligns a front end of a sheet bundle stacked in a tray in a discharging direction. A sheet bundle conveying unit holds a rear end of the sheet bundle and conveys the sheet bundle in the discharging direction. The aligning unit is arranged to be retracted from a conveying path of the sheet bundle after aligning the front end of the sheet bundle and to come out in the conveying path of the sheet bundle behind the sheet bundle conveying unit after a movement of the sheet bundle conveying unit.