Crossover Switch for Sortation Conveyor Intersections

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Solution Overview

Problem

In dual-sided sortation conveyors with laterally aligned spur conveyors, maintaining pushers on the correct divert guide path at intersections is challenging, requiring an effective crossover switch mechanism to ensure accurate diversion of articles.

Innovation Solution

A crossover switch mechanism comprising a guide block with divergent divert guide paths, actuator arms, and a switch assembly that uses pivotable actuators and link members to maintain pushers on the correct path by funneling them through wide entrances and converging surfaces, ensuring smooth transition across intersections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a crossover switch mechanism is implemented to maintain pushers on the correct divert guide path at intersections, then the accuracy of article diversion is improved, but the device complexity increases

Engineering Contradiction:

Improveaccuracy of article diversionVSAvoidcomplexity of crossover switch mechanism

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The crossover switch mechanism is divided into separate functional components including guide blocks with divergent/diverging paths, actuator arms, link members, and pivotable actuators. Each segment performs a specific function in guiding and directing pushers through the intersection, allowing for modular design and maintenance while achieving precise diversion control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Guide blocks serve as intermediary elements that provide wide entrances and converging surfaces to funnel pushers onto the correct divert guide paths. These intermediary structures mediate between the intersecting paths, ensuring smooth transitions and preventing misalignment without requiring complex active control systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If guide blocks with wide entrances and converging surfaces are used to funnel pushers, then the smoothness of transition is improved, but the amount of space required increases

Engineering Contradiction:

Improvesmoothness of pusher transitionVSAvoidspace occupied by guide block

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The guide blocks incorporate curved converging surfaces and divergent paths that smoothly redirect pushers through the intersection. The curved geometry allows for gradual redirection rather than sharp angles, improving transition smoothness while compacting the overall space required compared to straight-line guidance paths.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS7530441B2Sortation conveyor and crossover switch therefor

Publication Date: 2009.05.12 INTELLIGRATED HEADQUARTERS LLC

AI summary

A crossover switch for a sortation conveyor has actuators that extend into the divert guide path which are operable to respond to the travel of a guide element through the path to move the switch element from one position to another.