Sliding Fastener for Drain Cover Assembly

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Solution Overview

Problem

Existing drainage system cover devices for roof drainage systems are difficult to assemble and often require tools, leading to potential loss of fastening elements and increased complexity.

Innovation Solution

A covering device with a slidably mounted fastening element that can be moved from a release to a locking position without tools, featuring a latching connection and pivotable design, ensuring easy assembly and protection from environmental influences.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a separate fastening element is used to secure the cover part to the drain element, then the cover part can be firmly fixed, but the fastening element may be lost during assembly and the assembly process becomes more complex

Engineering Contradiction:

Improvefixing reliabilityVSAvoidassembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The fastening element is integrated into the cover part as a unified component. The cover part contains a receptacle for the fastening element, and the fastening element is retained by a retention element formed as an integral part of the cover part. This merging eliminates the risk of losing separate fastening elements during assembly and simplifies the overall device structure while maintaining reliable fixing.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a separate fastening element is used to secure the cover part, then the cover part can be firmly fixed, but tools are required for assembly

Engineering Contradiction:

Improvefixing reliabilityVSAvoidassembly ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The fastening element is designed to be manually operable without requiring external tools. The retention element features a free end that can be accessed from the outer side of the cover part, allowing the fastening element to be inserted, positioned, and locked into place by hand. This self-service design enables tool-free assembly while ensuring reliable fixing of the cover part to the drain element.

Inventive Principle:

Principle #25Self-service

3Reliability

If the fastening element is arranged on the underside of the cover part, then it can secure the cover part effectively, but it becomes inaccessible and difficult to assemble

Engineering Contradiction:

Improvefixing reliabilityVSAvoidaccessibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Instead of placing the fastening element on the underside of the cover part (traditional arrangement), the invention inverts the arrangement by positioning the fastening element in a receptacle on the outer side of the cover part. The retention element's free end is accessible from the outer side, allowing the fastening element to be operated from the outside. This inverted arrangement maintains effective securing while dramatically improving accessibility and ease of assembly.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP2703576B1Covering device for covering the pipe entry of a drain element of a drainage system

Publication Date: 2015.07.01 GEBERIT INT AG

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AI summary

A cover (1) for covering the pipe inlet (2) of a drain element (3) of a drainage system comprises a cover (4) for covering a pipe inlet (2), at least one passage (5) through which water can be supplied to the pipe inlet, and at least one fastening element (6) for fastening the cover (4) to the drain element (3). The fastening element (6) is slidably mounted on the cover (1), in particular on the cover (4), wherein the fastening element (6) is movable from a position releasing the cover (4) to the drain element (3) to a position locking the cover (4) to the drain element (3).