Rotatable Stacking Tray for Long Sheet Alignment

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Solution Overview

Problem

Conventional sheet stacking apparatuses face challenges in aligning and stacking long-length sheets due to their weight and large surface area, leading to issues like buckling and interference, especially when trying to maintain alignment characteristics without compromising user convenience.

Innovation Solution

A sheet stacking apparatus with a pair of vertically overlapping sections, including a first stacking section, a rotatably connected second section that extends downstream, and a third section with an elastically deformable linear member, allowing for adjustable length and installation area, and featuring regulation portions to prevent detachment and reduce friction resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If a long stacking tray is provided to stack long-length sheets, then the stacking capability for long sheets is improved, but the tray interferes with downstream apparatuses

Engineering Contradiction:
Improvestacking tray lengthVSAvoidinterference with downstream apparatus
Core Design Contradiction:
Length of moving objectVSObject-affected harmful factors

Solution Approach 1:

The stacking tray is designed to be rotatable about a vertical axis, allowing it to change its extension direction dynamically. This enables the tray to extend in different directions based on the sheet size being stacked, avoiding interference with downstream apparatus while maintaining the ability to stack long-length sheets

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If an inclined discharge tray is provided to enhance alignment characteristics, then sheet alignment is improved, but long-length sheets experience buckling and bowing due to their weight and large surface area

Engineering Contradiction:
Improvesheet alignmentVSAvoidsheet flatness
Core Design Contradiction:
Manufacturing precisionVSStability of the object's composition

Solution Approach 1:

The discharge tray is divided into multiple sections with different inclined angles. The upstream section has a larger inclined angle for alignment, while the downstream section has a smaller inclined angle to support the weight of long-length sheets and prevent buckling. This segmentation allows each section to perform its specific function optimally

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different sections of the discharge tray have different local properties (inclined angles) tailored to specific functional requirements. The upstream portion provides alignment through a steeper angle, while the downstream portion provides support through a gentler angle, creating local quality variations that solve both alignment and stability issues

Inventive Principle:
Principle #3Local quality

3Adaptability or versatility

If a paper supporter is inserted in the sheet discharge part to handle long-length sheets, then the ability to stack long sheets is improved, but the device complexity increases

Engineering Contradiction:
Improvelong sheet handling capabilityVSAvoidstacking apparatus structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The rotatable stacking tray serves multiple functions: it can stack both long-length sheets and standard sheets, and its rotation mechanism allows it to adapt to different sheet sizes and stacking positions. This multi-functionality reduces the need for separate specialized components for different sheet types

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

Enables neat storage and alignment of long-length sheets without affecting downstream apparatuses, reducing buckling and interference, while allowing for easy adjustment and detachment of components for various sheet sizes and weights.

Implementation Method 1

a third stacking section which is attached to the second stacking section, provided to extend from a downstream end of the second stacking section in the sheet transport direction, and which is attachable and detachable with respect to the second stacking section in a rotation direction

Methodology Applied
Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS11667488B2Sheet stacking apparatus and image forming apparatus provided with the same
Publication Date: 2023.06.06 CANON FINETECH NISCA INC
  • US11667488B2 patent drawing
  • US11667488B2 patent drawing
  • US11667488B2 patent drawing

AI summary

In order to provide a sheet stacking apparatus for maintaining alignment characteristics of long-length sheets, the sheet stacking apparatus is a sheet stacking apparatus located above in a pair of sheet stacking apparatuses provided to overlap vertically along a vertical direction, and is provided with a first stacking section for stacking sheets, a second stacking section provided to extend from a downstream end of the first stacking section in a sheet transport direction and connected to the first stacking section rotatably, and a third stacking section which is attached to the second stacking section to extend from a downstream end of the second stacking section in the sheet transport direction, includes an inclined angle with respect to a horizontal surface smaller than in the second placing face, and which is attachable and detachable with respect to the second stacking section in a rotation direction.