Sheet Binding Device Velocity Control for Consistent Binding Force

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing sheet binding mechanisms face challenges in achieving stable binding due to variations in binding force caused by differences in biting degree, particularly when using projecting-and-recessed surfaces to deform sheet bundles, leading to inconsistent binding quality.

Innovation Solution

A sheet binding device with a pressurizing unit, a drive motor, and a controller that controls the engagement velocity of the pressurizing section with the sheet bundle, ensuring a predetermined setting velocity is maintained to stabilize the binding process and minimize variations in binding force.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If projecting-and-recessed surfaces are used to deform sheet bundles, then binding force is increased, but binding force varies due to difference in biting degree

Engineering Contradiction:

Improvebinding forceVSAvoidbinding consistency

Core Design Contradiction:

ForceVSReliability

Solution Approach 1:

The patent applies parameter changes by controlling the engagement velocity of the pressurizing member with the sheet bundle. The controller adjusts the moving velocity of the pressurizing member to a predetermined setting velocity during engagement, which standardizes the binding process and eliminates variations in binding force caused by differences in biting degree. This velocity parameter control ensures consistent binding force while maintaining the deformation effect of the projecting-and-recessed surfaces.

Inventive Principle:

Principle #35Parameter changes

2Strength

If high pressure is applied to plastically deform sheet material, then sheets are engaged for binding, but binding stability varies due to uncontrolled pressurizing velocity

Engineering Contradiction:

Improvesheet engagementVSAvoidbinding accuracy

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The patent implements feedback control through the controller that monitors and adjusts the engagement velocity of the pressurizing member. The controller receives feedback on the actual velocity and modifies the drive signal to maintain the predetermined setting velocity during the engagement phase. This feedback mechanism ensures that high pressure is applied consistently at the correct velocity, achieving both strong sheet engagement and precise binding accuracy.

Inventive Principle:

Principle #23Feedback

3Productivity

If pressurizing member moves quickly to bind sheet bundle, then productivity is improved, but binding force varies due to velocity variation

Engineering Contradiction:

Improvebinding speedVSAvoidbinding force consistency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies dynamics by implementing variable velocity control during the pressurizing member's movement. The controller adjusts the velocity dynamically based on the engagement stage: higher velocity during approach for productivity, and controlled predetermined setting velocity during actual engagement for consistency. This dynamic adjustment allows the system to maintain both high productivity and reliable binding force consistency.

Inventive Principle:

Principle #15Dynamics

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

The controlled engagement velocity enhances the accuracy and consistency of the binding process, ensuring uniform deformation and engagement of sheets, thereby improving the overall binding quality.

Implementation Method 1

a pressurizing section (pressurizing member 30, 40) that pressurizes the sheet bundle

Methodology Applied

Scientific EffectPressure: Pressure Increase

Implementation Method 2

there occurs a need to plastically deform the sheet material by applying high pressure

Methodology Applied

Scientific EffectPlastic deformation: Plasticity

Implementation Method 3

a drive motor that actuates the pressurizing unit

Methodology Applied

Scientific EffectElectromagnetic conversion: Electromagnetic Induction

Implementation Method 4

a transmission unit that changes rotation of the drive motor to the pressing force

Methodology Applied

Scientific EffectMechanical advantage: Mechanical Advantage

Data Source

PatentUS9751276B2Sheet binding device, post-processing device, and image forming system

Publication Date: 2017.09.05 CANON FINETECH NISCA INC

AI summary

A sheet binding device includes a pressurizing unit that pressurizes a sheet bundle to bind the sheet bundle, a pressurizing section that is disposed in the pressurizing unit and configured to be moved from a waiting position separated from the sheet bundle to a pressurizing position at which the pressurizing section pressurizes the sheet bundle, a drive motor that actuates the pressurizing unit, and a controller that controls the drive motor such that the pressurizing section is engaged with the sheet bundle at a predetermined setting velocity.