Guide Rail Fire Door Layout for Low-Vibration Transport Travel

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Solution Overview

Problem

Existing transport facilities with fire doors and guide rails experience vibrations when transport vehicles pass cut portions, compromising the stability and protection of the transport vehicle and its cargo.

Innovation Solution

A transport facility design featuring a guide rail with two rail bodies and a fire door that moves along the wall surface, incorporating grooves and a notch to ensure seamless travel faces, an auxiliary door to close the notch, and heat-resistant materials to minimize contact and gaps, thereby reducing vibrations and enhancing stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the fire door is disposed to diagonally cross two guide rails to prevent wheels from passing cut portions simultaneously, then vibrations are reduced, but the wheels still pass the cut portions causing vibrations

Engineering Contradiction:
Improvestability of transport vehicleVSAvoidvibrations
Core Design Contradiction:
Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The fire door is divided into multiple sections: an upper closing section, a lower closing section, and a connecting section. This segmentation allows the fire door to selectively close regions above and below the guide rails while incorporating a notch that prevents contact with the rails, thereby eliminating vibrations caused by wheels passing through cut portions.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The fire door is designed with different functional regions: the upper and lower closing sections provide fire protection, while the connecting section with the notch provides a vibration-reducing feature by preventing contact with the guide rails. This local differentiation allows each part to serve its specific function optimally.

Inventive Principle:
Principle #3Local quality

2Object-affected harmful factors

If the fire door moves along the wall surface in the arrangement direction of the rail bodies, then contact between the fire door and guide rails is avoided, but the notch width must be reduced

Engineering Contradiction:
Improvecontact between fire door and guide railVSAvoidnotch width
Core Design Contradiction:
Object-affected harmful factorsVSShape

Solution Approach 1:

The fire door is configured to move along the wall surface in the arrangement direction of the rail bodies (horizontal movement), rather than moving perpendicular to the rails. This dimensional change in movement direction allows the notch to be positioned optimally to prevent contact with the guide rails while maintaining appropriate width for structural integrity.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Stability of the object's composition

If the upper and lower closing sections close regions above and below the rail bodies, then seamless continuity of travel faces is achieved, but the fire door structure becomes more complex

Engineering Contradiction:
Improvecontinuity of travel facesVSAvoidfire door structure
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The fire door is segmented into an upper closing section, a lower closing section, and a connecting section with a notch. This segmentation enables the fire door to close regions above and below the guide rails to achieve seamless continuity of travel faces, while the modular segmented structure actually simplifies the overall design compared to a monolithic door requiring similar functionality.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS12534954B2Transport facility
Publication Date: 2026.01.27 DAIFUKU CO LTD
  • US12534954B2 patent drawing
  • US12534954B2 patent drawing
  • US12534954B2 patent drawing

AI summary

A transport facility includes a guide rail which is disposed along a travel path extending in a travel direction through an opening of a wall and which is configured to guide traveling of a transport vehicle, and a fire door configured to open and close the opening. The fire door is configured to, in closing the opening, move toward a first side in an arrangement direction from an open position to a closed position. The fire door includes a notch penetrating the fire door in the travel direction and open on the first side to prevent the fire door from coming into contact with the first rail body and the second rail body while the fire door is moving from the open position to the closed position.