Swing Arm Guide Structure for Stable Article Transfer Tilting

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Solution Overview

Problem

The existing article transport vehicles with swing arms used to tilt the placement body for transferring articles often experience wobbling, which can cause articles to fall or reduce the durability of the swing arms, as they lack effective support mechanisms to stabilize the swinging motion.

Innovation Solution

The article transport vehicle incorporates a guide member that sandwiches the swing arm from both sides in the axial direction within a prescribed guide range, preventing wobbling by ensuring the swing arm remains stable as it moves from a reference to a standing position, thereby maintaining the placement body's tilt and ensuring article transfer stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a simple swing arm mechanism is used to tilt the placement body, then the device complexity is reduced, but the swing arm wobbles during operation

Engineering Contradiction:
Improvemechanism simplicityVSAvoidswing arm stability
Core Design Contradiction:
Device complexityVSStability of the object's composition

Solution Approach 1:

A guide member is introduced as an intermediary component between the swing arm and the carriage body. The guide member includes a guide surface that contacts the swing arm and restricts its movement to a predetermined swing path, preventing wobble while maintaining the simplicity of the swing arm mechanism itself

Inventive Principle:
Principle #24Intermediary (Mediator)

2Device complexity

If the swing arm has a small width to maintain simplicity, then the device complexity is reduced, but the swing arm durability is reduced

Engineering Contradiction:
Improvemechanism simplicityVSAvoidswing arm durability
Core Design Contradiction:
Device complexityVSStrength

Solution Approach 1:

The guide member acts as a mediator that provides lateral support to the swing arm during operation. This allows the swing arm to maintain its simple, narrow design while the guide member prevents excessive bending moments and lateral forces that would compromise durability

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of operation

If the swing arm is allowed to move freely to ease operation, then the ease of operation is improved, but the article may fall before sliding to the transfer destination

Engineering Contradiction:
Improveswing arm movement freedomVSAvoidarticle transfer safety
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The guide member serves as an intermediary constraint that allows the swing arm to move freely within the intended swing arc while preventing unwanted lateral movements. The guide surface ensures the swing arm follows a precise path, guaranteeing that articles remain stable and reach the transfer destination safely

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

Instead of constraining the swing arm with complex mechanical joints, the invention uses a guide surface that allows free movement in the desired direction while passively restricting movement in unwanted directions through geometric constraint

Inventive Principle:
Principle #13The other way round (Inversion)

Data Source

PatentUS11834278B2Article transport vehicle
Publication Date: 2023.12.05 DAIFUKU CO LTD
  • US11834278B2 patent drawing
  • US11834278B2 patent drawing
  • US11834278B2 patent drawing

AI summary

A swing arm changes a position of a placement surface of a placement body between a horizontal position and a tilted position by swinging between a reference position at which the swing arm extends along an opposing surface facing a lower surface of the placement body and a standing position at which the swing arm is tilted relative to the opposing surface. The opposing surface is provided with a guide member configured to guide swinging movement of the swing arm, and the guide member is configured to support the swing arm by sandwiching the swing arm from both sides in an axial direction within a prescribed guide range including the reference position in a total swing range of the swing arm.