Formwork Element with Integrated Strip Attachment

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Solution Overview

Problem

Existing stop-end formwork systems require damaging expensive frame formwork to attach concrete cover strips, leading to costly and time-consuming repairs.

Innovation Solution

A stop-end formwork element with a support and fastening device that allows the concrete cover strip to be attached outside the formwork cavity, ensuring correct positioning and secure attachment without damaging the frame formwork, and includes recesses for reinforcing bars to enhance positional security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If concrete cover strips are nailed to side formwork, then the strips can be securely attached, but the expensive frame formwork is damaged and requires costly repairs

Engineering Contradiction:

Improveattachment securityVSAvoidformwork repairability

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The formwork system is segmented into side formwork and end formwork components. The concrete cover strip attachment is relocated from the side formwork to the end formwork element, separating the attachment function from the expensive frame formwork structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The end formwork element acts as an intermediary component that provides the attachment surface for concrete cover strips. This mediator absorbs the attachment function, protecting the side formwork from damage while ensuring secure strip attachment.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If concrete cover strips are attached after side formwork erection, then proper positioning is achieved, but installation time increases

Engineering Contradiction:

Improvestrip positioning accuracyVSAvoidinstallation time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The concrete cover strips are pre-attached to the end formwork element during manufacturing or preparation, rather than being attached on-site after formwork erection. This preliminary action ensures precise positioning while reducing on-site installation time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The attachment of concrete cover strips is merged with the end formwork element assembly, creating a pre-assembled unit that is installed as one component, eliminating separate attachment steps.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If frame formwork is used for high quality construction, then build quality improves, but damage from nailing increases repair costs

Engineering Contradiction:

Improveconstruction qualityVSAvoidformwork damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The harmful nailing action is extracted from the frame formwork system and relocated to the end formwork element. The attachment function is separated from the expensive frame formwork, eliminating the harmful effect while maintaining construction quality.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The end formwork element is designed to absorb the harmful nailing effects, converting potential damage to the expensive frame formwork into a controlled, acceptable effect on the end formwork component that is intended for temporary use.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentEP2199477B1Formwork element

Publication Date: 2017.02.15 FWR SOLUTIONS

AI summary

The element (1) has a formwork wall (2) defining a plane (E), and a supporting and fastening device (3) for supporting a concrete cover strip (4) running transverse to the plane, and provided at an edge-side. The supporting and fastening device protrudes at a side of the plane. The formwork wall is made of expandable metal and bendable material, and an edge area (2d) of the formwork wall is bent for forming a contact surface (5) of the supporting and fastening device. Accommodating recesses (8) are provided in the formwork wall for positioning armoring elements (9).