Sleeper Transfer Wagon With Fixed Frame to Replace Gantry Cranes

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Solution Overview

Problem

Existing railway construction and renewal processes using gantry cranes for sleeper transfer are hazardous due to high-speed movements alongside wagons, posing safety risks to personnel and requiring complex spatial arrangements.

Innovation Solution

A sleeper transfer wagon with a fixed frame and transfer mechanism that transfers sleepers longitudinally between receiving and conveying platforms, eliminating the need for gantry cranes by ensuring safe, continuous, and compact operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a gantry crane is used for sleeper transfer between wagons, then the transfer operation can be performed, but safety risks increase due to high-speed back-and-forth movements alongside personnel

Engineering Contradiction:

Improvesleeper transfer efficiencyVSAvoidsafety risks to personnel

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Instead of using a gantry crane that moves back and forth alongside wagons, the patent inverts the approach by placing a fixed transfer mechanism on one wagon that transfers sleepers laterally to adjacent wagons. This eliminates the need for high-speed gantry movements and associated safety risks while maintaining transfer functionality.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces an intermediate transfer wagon equipped with a fixed transfer mechanism that acts as a mediator between sleeper storage wagons and laying equipment. This intermediary system enables sleeper transfer without requiring a traditional gantry crane, thereby eliminating safety hazards to personnel.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If a gantry crane moves at high speed alongside wagons, then transfer operations are efficient, but complex spatial arrangements and safety precautions are required

Engineering Contradiction:

Improvetransfer operation speedVSAvoidspatial arrangement complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent inverts the traditional gantry crane approach by making the transfer mechanism stationary on a wagon rather than moving. This simplifies the spatial arrangement requirements while maintaining transfer efficiency, as the fixed mechanism only needs to operate laterally to adjacent wagons.

Inventive Principle:

Principle #13The other way round (Inversion)

3Adaptability or versatility

If a traditional gantry crane system is used, then sleepers can be transferred between wagons, but the system requires large spatial footprint and movement clearance

Engineering Contradiction:

Improvesleefer transfer capabilityVSAvoidspatial footprint

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent inverts the gantry crane concept by placing the transfer mechanism on a wagon itself, transforming it into a mobile fixed platform. This approach maintains sleeper transfer capability while significantly reducing the spatial footprint and clearance requirements compared to a traditional gantry crane system.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP3892775B1Carriage for transferring sleepers and associated railway vehicle

Publication Date: 2025.12.24 MATISA MATERIEL INDUSTRIEL SA

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AI summary

The invention relates to a sleeper transfer wagon (100) intended to equip a railway vehicle of the type comprising equipment for laying new sleepers (21) and/or removing worn sleepers (22), the transfer wagon (100) comprising a chassis (110) supported by at least one set of wheels (112), the transfer wagon (100) being notable in that it comprises at least one transfer unit (50) supported by a frame (60), the frame (60) being supported by the chassis (110) and fixed relative to the chassis (110), the transfer unit (50) being configured to transfer sleepers from at least one receiving area (Z1, Z2) to at least one conveying platform (P2).