Sheet Processing Tool Facing Device for Friction Reduction
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Solution Overview
Problem
Conveyance type sheet processing apparatuses lack a stable facing member to prevent deformation of sheets during processing, leading to reduced durability and accuracy due to uneven pressure distribution and friction issues.
Innovation Solution
The apparatus incorporates a tool facing device with rotating rollers that move synchronously with the sheet conveyance, providing a stable facing surface that reduces friction and wear, and a tool moving device that allows processing tools to move orthogonally to the conveyance direction, enabling precise two-dimensional processing without deteriorating the facing members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conveyance type sheet processing apparatus is used to reduce apparatus size, then the apparatus size is reduced, but the facing member deteriorates quickly due to friction and uneven pressure distribution
Solution Approach 1:
The patent applies the dynamics principle by making the processing tool movable in the conveyance direction rather than stationary. The processing tool moves synchronously with the sheet conveyance, which changes the relative motion relationship between the tool and the facing member. This dynamic configuration reduces friction and wear on the facing member while maintaining compact apparatus size, thereby resolving the contradiction between size reduction and facing member durability.
Solution Approach 2:
The patent introduces an intermediary mechanism (the movable processing tool with synchronous conveyance) between the sheet and the facing member. This intermediary allows the processing tool to move in coordination with the sheet, distributing pressure more evenly and reducing direct friction between the facing member and the sheet or tool, thus extending facing member life while maintaining compact size.
2Device complexity
If the processing tool is stationary and the sheet moves, then the apparatus structure is simplified, but processing accuracy deteriorates due to friction and wear on the facing member
Solution Approach 1:
The patent transitions from a static processing tool configuration to a dynamic one where the processing tool moves synchronously with sheet conveyance. This dynamic setup maintains relatively stable pressure distribution and reduces friction-induced positioning errors, thereby improving processing accuracy. The increased structural complexity is justified by the significant improvement in precision and facing member durability.
3Device complexity
If the processing tool moves orthogonally to the conveyance direction only, then the apparatus structure is simplified, but processing capability is limited for arbitrary two-dimensional trajectories
Solution Approach 1:
The patent adds the conveyance direction as an additional dimension of motion for the processing tool. Instead of restricting tool movement to only the direction orthogonal to sheet conveyance, the tool can now move in both the orthogonal direction and the conveyance direction. This two-dimensional tool motion capability enables arbitrary trajectory processing while maintaining reasonable structural complexity through synchronous conveyance mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances processing accuracy and reduces the size of the apparatus while maintaining high durability of the facing members, ensuring efficient and precise sheet processing along desired trajectories.
Implementation Method 1
The facing member includes an elastic member such as a cutter mat
Implementation Method 2
providing a stable facing surface that reduces friction and wear
Data Source
AI summary
A sheet processing apparatus includes a sheet conveyor configured to convey a sheet, a processing tool configured to perform processing to the sheet, a tool contact separation device, a tool moving device, and a tool facing device. The tool contact separation device is configured to contact and separate the processing tool 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 has an opposing face and is disposed at a position at which the tool facing portion faces the processing tool via the sheet. The tool facing device is configured to move to change the tool facing portion in accordance with a relative moving direction of the sheet with respect to the processing tool when the processing tool performs the processing to the sheet.