Sheet Processing Apparatus Tool Facing Device
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Solution Overview
Problem
Existing sheet processing apparatuses face challenges in maintaining the position of sheets during processing, leading to inaccuracies and potential 'sag' or 'deviation', especially when performing cut or crease processes, due to the way sheets are gripped and conveyed.
Innovation Solution
The proposed sheet processing apparatus incorporates a tool facing device with rotary members and gripping rollers that grip the sheet at specific positions, maintaining its position during processing by moving in synchronization with the conveyance rollers, ensuring accurate processing by preventing positional deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the sheet is conveyed using conventional gripper mechanisms, then the sheet can be moved through the processing apparatus, but the sheet position deviates and sags during processing
Solution Approach 1:
The patent applies the dynamics principle by making the sheet conveying system movable rather than stationary. The conveying rollers are mounted on a movable carrier that can move in the width direction of the sheet, allowing the gripper to dynamically adjust its position and maintain optimal contact with the sheet during processing, thereby preventing position deviation and sag.
Solution Approach 2:
The patent implements feedback control through a position detection device that continuously monitors the sheet position and a control device that adjusts the carrier position based on the detected information. This closed-loop feedback system ensures the sheet maintains accurate positioning throughout the processing operation, preventing deviation and sag.
2Adaptability or versatility
If the processing tool moves in a direction intersecting the conveyance direction, then two-dimensional processing can be performed on the sheet, but maintaining sheet position becomes difficult
Solution Approach 1:
The patent applies dynamics by enabling the conveying rollers to move in the width direction of the sheet through a movable carrier mechanism. This dynamic adjustment capability allows the system to maintain accurate sheet positioning even when processing tools move in intersecting directions, supporting versatile two-dimensional processing while preserving position accuracy.
Solution Approach 2:
The feedback control system detects sheet position during two-dimensional processing and automatically adjusts the carrier position to compensate for any deviation. This real-time feedback ensures position accuracy is maintained regardless of the processing tool's movement pattern, enabling versatile processing operations.
3Productivity
If conventional sheet gripping methods are used, then the sheet can be conveyed, but sag and deviation occur during cut and crease processes
Solution Approach 1:
The patent applies dynamics by implementing a movable carrier that allows the conveying rollers to dynamically adjust their position in the width direction. This dynamic positioning prevents sag and deviation during cut and crease processes while maintaining continuous sheet conveyance, thereby preserving both processing efficiency and precision.
Solution Approach 2:
The feedback control device continuously monitors sheet position during cut and crease operations and adjusts the carrier position to prevent sag and deviation. This real-time correction maintains processing precision without interrupting the conveyance flow, preserving productivity while eliminating positioning errors.
Data Source
AI summary
A sheet processing apparatus includes a sheet conveyor, a processing tool, a tool contact separation device, a tool moving device, and a tool facing device. The sheet conveyor is configured to convey a sheet. The processing tool is configured to perform processing to the sheet. The tool contact separation device is configured to contact and separate the processing tool with respect to the sheet. The tool moving device is configured to move the processing tool in a direction intersecting a conveyance direction of the sheet. The tool facing device includes a tool facing portion and a sheet gripper. The tool facing portion includes a rotary member supported by a shaft and is disposed at a position facing the processing tool via the sheet. The sheet gripper includes a rotary member supported by a shaft and is configured to grip the sheet with the tool facing portion.