Retractable Overturn Prevention Arm for Narrow-Passage Conveyance

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Solution Overview

Problem

Conventional overturn prevention devices for conveyance devices often obstruct passages due to their width, restricting the conditions under which they can be used, especially in indoor settings like factories.

Innovation Solution

The design incorporates a rotatable overturn prevention arm that can retract into the vehicle body, reducing lateral width and allowing the device to move freely, while still protruding outward to prevent overturning, thus minimizing energy consumption and avoiding obstruction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the overturn prevention device projects outward in the width direction to reliably prevent overturning, then the overturn prevention effectiveness is improved, but the lateral width increases causing obstruction in passages

Engineering Contradiction:

Improveoverturn prevention effectivenessVSAvoidlateral width

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The overturn prevention arm is designed to be movable between a retracted state (during travel) and a protruding state (during work operations). This dynamic configuration allows the device to adapt its lateral width based on operational requirements, reducing passage obstruction during movement while maintaining overturn prevention capability during stationary work.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The overturn prevention function is separated from the main vehicle body through a detachable, movable arm structure. This segmentation allows the overturn prevention component to be independently positioned - retracted when not needed and extended when required - without permanently increasing the vehicle's lateral width.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the overturn prevention arm rotates on a horizontal axis to move upward against gravity, then the arm can protrude outward, but the energy consumption increases

Engineering Contradiction:

Improveoverturn prevention capabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The overturn prevention arm rotates on a vertical axis rather than a horizontal axis, allowing the arm to move horizontally without changing its vertical position. This eliminates the need to work against gravitational force, significantly reducing energy consumption while maintaining the ability to protrude outward for overturn prevention.

Inventive Principle:

Principle #12Equipotentiality

Data Source

PatentUS20250018902A1Overturn prevention device and conveyance device

Publication Date: 2025.01.16 NABTESCO CORP

AI summary

An overturn prevention device relating to an embodiment includes an overturn prevention arm supported on a vehicle body such that the overturn prevention arm is rotatable on an axis of rotation extending in a top-bottom direction, the overturn prevention arm being configured to prevent the vehicle body from overturning. The overturn prevention arm moves between a retracted state where the overturn prevention arm is retracted into the vehicle body and a used state where the overturn prevention arm protrudes beyond the vehicle body.