Sheet Processing Unit Damping for High-Speed Insertion

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Solution Overview

Problem

Existing sheet processing apparatuses face issues with draw-out units colliding with the apparatus frame due to high-speed insertion, leading to malfunctions or breakages, particularly when heavy units are suddenly stopped by braking mechanisms.

Innovation Solution

A sheet processing apparatus equipped with a braking mechanism that slows down the draw-out unit upon high-speed insertion and a damper mechanism to absorb the impact, preventing collisions and reducing stress on the braking mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a braking mechanism is used to stop the draw-out unit at high speed, then collision with the frame is prevented, but a large load is applied to the braking mechanism causing malfunction

Engineering Contradiction:
Improvecollision preventionVSAvoidload on braking mechanism
Core Design Contradiction:
ReliabilityVSForce

Solution Approach 1:

The patent introduces a damper mechanism that operates before the braking mechanism to absorb the impact energy of the draw-out unit. The damper includes a damper rod connected to the draw-out unit and a damper spring that expands to cushion the impact, thereby preventing the full force from reaching the braking mechanism and avoiding its malfunction

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

2Productivity

If the draw-out unit is inserted at high speed, then operation efficiency is improved, but collision with the frame or internal parts occurs causing malfunction or breakage

Engineering Contradiction:
Improveinsertion speedVSAvoidcollision-free operation
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The damper mechanism is positioned to activate before the draw-out unit reaches the frame or internal parts, cushioning the impact in advance and preventing collision damage while allowing high-speed insertion

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

3Ease of operation

If the draw-out unit is suddenly stopped by braking, then insertion position control is improved, but the sudden stoppage causes large load on the braking mechanism

Engineering Contradiction:
Improveposition controlVSAvoidload on braking mechanism
Core Design Contradiction:
Ease of operationVSForce

Solution Approach 1:

The damper spring is pre-configured to expand and absorb impact energy before the braking mechanism engages, providing a cushioned deceleration that maintains position control while reducing the force burden on the braking mechanism

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

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 solution effectively prevents collisions and reduces the risk of mechanical damage, ensuring smooth operation and prolonging the lifespan of the apparatus components.

Implementation Method 1

a damper mechanism configured to absorb an impact on the braking mechanism in a case where the braking mechanism act, by applying a load to the processing unit moving in the direction from the drawn-out position toward the accommodated position

Methodology Applied
Scientific EffectImpact absorption: Damping

Data Source

PatentUS20250214802A1Sheet processing apparatus, sheet accommodating apparatus, and image forming system
Publication Date: 2025.07.03 CANON FINETECH NISCA INC
  • US20250214802A1 patent drawing
  • US20250214802A1 patent drawing
  • US20250214802A1 patent drawing

AI summary

A sheet processing apparatus includes a processing unit, a braking mechanism, and, a damper mechanism. The processing unit is movable to a drawn-out position and an accommodated position. The drawn-out position is a position where the processing unit is drawn out from the sheet processing apparatus. The accommodated position is a position where the processing unit is accommodated in the sheet processing apparatus. The braking mechanism acts to brake the processing unit in a case where the processing unit is inserted in a direction from the drawn-out position toward the accommodated position at a speed equal to or higher than a predetermined speed. The damper mechanism absorbs an impact on the braking mechanism in a case where the braking mechanism act, by applying a load to the processing unit moving in the direction from the drawn-out position toward the accommodated position.