Magnetic Formwork Attachment Device for Prefabricated Construction

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Solution Overview

Problem

Existing fixing devices for shoring pieces in prefabricated construction elements face issues such as rapid wear, limited reusability, and increased manufacturing time due to friction-based or glue-based attachment methods, which require scraping and result in unsightly residue.

Innovation Solution

A fixing device with magnetic structures for secure attachment to both formwork and shoring pieces, eliminating the need for glue or screws, allowing easy installation and removal without mechanical wear, and enabling multiple uses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a friction-based fastening system is used to attach the fixing device to the formwork, then the device can be easily installed and removed, but it wears out quickly and is reusable only a few times

Engineering Contradiction:

Improveease of installation and removalVSAvoidreusability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces the friction-based mechanical fastening system with a magnetic attachment system. The magnetic fixing device uses magnetic attraction forces to attach to the formwork, eliminating mechanical wear while maintaining ease of installation and removal. This substitution of mechanical interaction with magnetic field interaction resolves the contradiction between ease of operation and reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Strength

If a threaded connection is used to attach the mounting sleeve to the fastener, then the connection is secure, but the installation and removal time increases

Engineering Contradiction:

Improveconnection strengthVSAvoidinstallation and removal time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The patent replaces the threaded mechanical connection system with a magnetic attachment system. The magnetic fixing device attaches to the shoring piece through magnetic attraction rather than threading, providing secure connection strength while dramatically reducing installation and removal time. This eliminates the time-consuming screwing and unscrewing operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If glue is used to attach the truncated conical portion to the formwork, then the attachment is strong, but residual glue remains on the wall requiring scraping and increasing manufacturing time

Engineering Contradiction:

Improveattachment strengthVSAvoidmanufacturing time and finish quality

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces the chemical adhesive bonding system with a magnetic attachment system. The magnetic fixing device attaches to the formwork through magnetic attraction forces, providing strong attachment without requiring glue application, drying time, or subsequent scraping operations. This eliminates the harmful residual glue and reduces manufacturing time while maintaining attachment strength.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Reliability

If a metal body with magnet is used for the fastening device, then the device is robust and reusable many times, but it still requires screwing operations that increase installation time

Engineering Contradiction:

Improverobustness and reusabilityVSAvoidinstallation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces the threaded mechanical connection system with a magnetic attachment system at the second interface. The magnetic fixing device attaches to the shoring piece through magnetic attraction rather than threading, maintaining robustness and reusability while eliminating the time-consuming screwing operations. This combines the benefits of magnetic attachment with the structural requirements of the shoring system.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The magnetic fixing device provides a quick, durable, and economical solution for attaching shoring pieces, preventing material flow during construction and facilitating easy removal of formwork, with no tools required, while maintaining a clean finish and reducing manufacturing time.

Implementation Method 1

a magnetic structure (7) for generating a magnetic attraction force

Methodology Applied

Scientific EffectMagnetic attraction force: Magnetism

Data Source

PatentEP3315692B1Device for attaching a supporting part and method for manufacturing a construction element incorporating said attachment device

Publication Date: 2023.12.13 SPURGIN LEONHART SAS

Figure 1A~1B
Figure 2
Figure 3~4

AI summary

The present invention relates to a device for fixing (1) at least one propping piece on at least a part of a formwork surface comprising: a body (4) comprising at least a first interface (5) for interaction with at least a part of a formwork surface of a construction element and a second interface (6) for interaction with at least one propping piece, the fixing device (1) being characterized in that: - the first interface (5) integrates at least a first magnetized structure to generate a first magnetic attraction force, - the second interface (6) includes translational retention means (8).