Directional Switches Using Magnetic Attraction for Guideways

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Solution Overview

Problem

Existing directional switches for guideways require frequent spring replacements and can accumulate dust, posing hygiene issues in food-handling environments, and have a complex structure.

Innovation Solution

The use of permanent magnets or ferromagnetic masses to move and maintain deviation arms in directional switches, eliminating the need for springs by leveraging magnetic attraction or repulsion for position changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If springs are used in directional switches, then the deviation arms can be maintained in stable equilibrium positions, but the springs require frequent replacement and accumulate dust causing hygiene problems

Engineering Contradiction:

Improveservice life of directional switchVSAvoiddust accumulation in springs

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical spring system with an electromagnetic system consisting of a permanent magnet mounted on the control pin and a ferromagnetic mass mounted on the deviation arm. The magnetic attraction force substitutes for the mechanical spring force, eliminating the need for springs while maintaining the same functional effect of holding the deviation arm in stable positions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the physical state and properties of the system by introducing magnetic fields. The permanent magnet creates a magnetic field that interacts with the ferromagnetic mass, changing the mechanism from purely mechanical (springs) to electromechanical (magnetic attraction), thereby resolving the hygiene issue while maintaining reliability.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If springs are used in directional switches, then the deviation arms can be moved between positions, but the structure becomes complex requiring multiple components

Engineering Contradiction:

Improvemovement of deviation armsVSAvoidstructure of directional switch

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent simplifies the structure by replacing the complex mechanical spring system with a more compact electromagnetic system. The permanent magnet and ferromagnetic mass configuration eliminates the need for separate spring components, mounting brackets, and adjustment mechanisms, thereby reducing overall device complexity while maintaining operational ease.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Extent of automation

If manual operation is used to move deviation arms, then the structure can be simple, but the operation requires manual intervention

Engineering Contradiction:

Improveautomatic movement of deviation armsVSAvoidmanual operation requirement

Core Design Contradiction:

Extent of automationVSEase of operation

Solution Approach 1:

The patent enables automatic operation by replacing the manual mechanical system with an electromagnetic system. The permanent magnet and ferromagnetic mass configuration allows the deviation arm to be automatically attracted to and held in the correct position based on the orientation of the control pin, eliminating the need for manual intervention while maintaining ease of operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 magnetic-based solution extends the lifespan of directional switches, prevents dust accumulation, and simplifies the structure, reducing maintenance and hygiene concerns while ensuring smooth operation of guideways.

Implementation Method 1

the deviation arms are dragged or thrust into their other position and maintained therein by the action of magnetic attraction or repulsion

Methodology Applied

Scientific EffectMagnetic attraction or repulsion: Magnetism

Implementation Method 2

maintained therein by the action of magnetic attraction or repulsion

Methodology Applied

Scientific EffectMagnetic attraction or repulsion: Magnetism

Data Source

PatentEP1777175B1Directional switches for overhead conveyors

Publication Date: 2008.01.23 ITALMODULAR

AI summary

The two-way (110) or three-way (10) directional switch for guideways, for moving miscellaneous products by suspension means slidable along the guideway, comprises a body (18, 20, 22) and a control mechanism (36, 40) including a vertical control pin (36) and, respectively, one (144) or three (42-44) horizontal deviation arms pivoted to the body such as to be able to rotate, about a relative vertical axis, from one to the other of two end angular positions as a result of rotating the control pin (36) between two end angular positions. One permanent magnet (56) or one ferromagnetic mass for each deviation arm (42-44; 144) is fixed to the lower end of the control pin (36), the deviation arm (42-44; 144) presenting respectively a ferromagnetic mass or a permanent magnet (54), or alternatively two permanent magnets (54, 56) are provided, one (56) rigid with the control pin (36) and the other (54) with the relative deviation arms (42-44; 144), such that when the control pin (36) is moved from one to the other of its two angular positions (Figures 1 and 2), the deviation arms (42-44; 144) are dragged or thrust into their other position and maintained therein by the action of magnetic attraction or repulsion.