Guide Rail Fastening With Integral Latch for Oven Side Grates

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Solution Overview

Problem

Existing fastening arrangements for fixing guide rails to side rails in pull-out guides, such as those in ovens, are complex and costly due to the need for additional holding elements that require welding, complicating manufacturing and assembly.

Innovation Solution

The guide rail incorporates integrally formed fastening means, including slots and a flexible latching web, allowing for secure attachment and alignment with bent end sections of the side rail without additional components, enabling easy manufacturing and assembly, and providing locking mechanisms to prevent accidental detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional holding elements are used to fix the guide rail to the side rail, then the attachment is secure, but the manufacturing complexity and cost increase due to welding requirements

Engineering Contradiction:
Improveattachment securityVSAvoidmanufacturing complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The holding elements are integrated directly into the guide rail as integral formations, merging two separate components (guide rail and holding elements) into one unified structure. This eliminates the need for separate welding operations while maintaining secure attachment to the side rail.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The guide rail serves multiple functions: it provides the structural support for the pull-out guide and simultaneously incorporates the holding elements for attachment to the side rail. This multi-functionality reduces the need for additional specialized components and welding processes.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If additional holding elements are welded to the guide rail, then the attachment is secure, but the assembly process becomes more complex and time-consuming

Engineering Contradiction:
Improveattachment securityVSAvoidassembly ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The holding elements are formed as integral parts of the guide rail, combining the attachment function with the guide rail structure itself. This allows the guide rail to be installed as a single component without separate welding steps, significantly simplifying the assembly process.

Inventive Principle:
Principle #5Merging (Combining)

3Reliability

If separate holding elements are used, then the attachment function is provided, but the manufacturing cost increases due to additional components and welding

Engineering Contradiction:
Improveattachment functionVSAvoidmanufacturing cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The holding elements are manufactured as integral formations of the guide rail, merging the attachment function into the main component. This eliminates the need to manufacture, supply, and weld separate holding elements, thereby reducing manufacturing costs.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The complex welding process and separate holding element components are extracted from the manufacturing system by integrating the attachment function directly into the guide rail formation process, simplifying the overall manufacturing operation.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentEP2403379B1Fastening arrangement
Publication Date: 2015.09.23 PAUL HETTICH GMBH & CO KG
  • EP2403379B1 patent drawingFigure 1
  • EP2403379B1 patent drawingFigure 2
  • EP2403379B1 patent drawingFigure 3~4

AI summary

The invention relates to a fastening arrangement for fixing a guide rail (8) of a pull-out guide (6) to a side grate (1), in particular for a backing oven, wherein the side grate (1) comprises at least one horizontal rod (4) having end sections (5) that are bent at an angle and that are each fixed to a post (2, 3), and the guide rail (8) is fixed to the rod (4), wherein fastening means for fixing the guide rail (8) to the rod (4) are integrally formed with the guide rail (8).