Segmented Corner Cut Blade for Inclined Sheet Trimming

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Solution Overview

Problem

Existing sheet processing technologies fail to efficiently cut corners of sheets in an inclined or curved manner and punch holes simultaneously, with existing solutions either requiring manual operation, being unstable, or unable to handle both lead and end edges effectively, and are often bulky due to heavy cut blades.

Innovation Solution

A corner cut apparatus with a support frame that enters and retracts into the sheet transport path, equipped with a cut blade for inclined or curved cutting and a punch blade for punching holes, allowing for automatic cutting of both lead and end edges in a compact and lightweight design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a cut blade longer than the width of the sheet is used to cut corners in an inclined or curved manner, then the cutting capability is improved, but the apparatus size and weight increase

Engineering Contradiction:

Improvecutting capabilityVSAvoidapparatus weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The cut blade is divided into multiple segments that can move independently. Each segment is shorter than the sheet width, but collectively they cover the entire cutting range through coordinated movement. This segmentation allows the apparatus to achieve full corner-cutting capability without using a single long, heavy blade.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cut blade segments are made dynamically movable along the sheet width direction, enabling them to position themselves at different locations as needed. This dynamic positioning allows the apparatus to perform inclined and curved corner cutting with multiple short segments rather than requiring a static long blade.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If a manual operation is used to set cut range and press cut blade, then the apparatus structure is simplified, but the cutting stability and precision deteriorate

Engineering Contradiction:

Improveapparatus structureVSAvoidcutting precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The apparatus is designed to automatically detect sheet positions and control cut blade movements without manual intervention. The system self-regulates the cutting process by coordinating the movement of multiple blade segments, eliminating the need for manual operation while maintaining high cutting precision.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The apparatus incorporates feedback mechanisms that monitor sheet position and adjust cut blade movements accordingly. This closed-loop control ensures precise cutting by continuously comparing actual positions with target positions and making real-time adjustments to blade segment movements.

Inventive Principle:

Principle #23Feedback

3Device complexity

If only the lead edge side of the sheet is cut, then the apparatus structure is simplified, but the functionality is limited

Engineering Contradiction:

Improveapparatus structureVSAvoidcutting coverage

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The apparatus is designed with multi-functional capability to cut both lead edge and end edge corners of sheets. The same segmented cut blade mechanism that cuts lead edge corners is reused to cut end edge corners by repositioning the blades along the sheet width direction, achieving universal corner-cutting functionality without duplicating the entire cutting mechanism.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If a heavy cut blade is used to cut corners in an inclined or curved manner, then the cutting capability is improved, but the drive mechanism size increases

Engineering Contradiction:

Improvecutting capabilityVSAvoiddrive mechanism size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The heavy single blade is segmented into multiple lighter components. Each segment requires less driving force and can be moved by a smaller, more compact drive mechanism. The segmented approach maintains cutting capability while reducing the size of the drive mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The apparatus replaces traditional heavy mechanical blade systems with a lighter segmented blade system actuated by modern drive mechanisms. This substitution reduces the overall size and weight of the drive mechanism while maintaining or improving cutting performance through coordinated segment movement.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10261461B2Apparatus for cutting corners and apparatus for forming images provided with the apparatus

Publication Date: 2019.04.16 CANON FINETECH NISCA INC

AI summary

A corner cut apparatus for entering into a transport path for transporting a sheet in a crossing direction to cut corners of the sheet includes a cut blade frame that supports a cut blade shifting with respect to the sheet surface, a receiving blade frame that supports a receiving blade for receiving the shifting cut blade, and a drive member that causes the cut blade frame and the receiving blade frame to enter into the transport path of the sheet, where blade shapes of the cut blade and the receiving blade are a back-to-back shape with an entry direction as a reference line. By this means, it is possible to provide the apparatus for cutting corners at the lead edge and end edge of the sheet in an inclined or curved manner, only by shifting (up and down) the blade with respect to the sheet surface.