Removable Stop Locking Device for Variable Wall Formwork Thickness

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Solution Overview

Problem

Existing anchoring systems for wall formworks in concrete casting require multiple anchor rods of different lengths and often need a second person to connect the anchor rod ends correctly, limiting efficiency and versatility.

Innovation Solution

A locking device with removable stops allows the end of an anchor rod to be fixed at two specified positions without visual inspection, enabling the anchor rod to be inserted to varying lengths through opposite wall formworks, thus increasing the effective length of the anchor rod and allowing for wall thicknesses up to 40 cm using a single type of anchor rod.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the anchor rod is made longer to accommodate thicker walls, then the wall thickness range is increased, but the handling and connection difficulty increases

Engineering Contradiction:
Improvewall thickness rangeVSAvoidhandling and connection
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The locking device is segmented into modular components including a body, a removable stop, and a locking mechanism. This segmentation allows the anchor rod to be connected at different positions along its length by simply removing or repositioning the stop, rather than requiring complex adjustment mechanisms for different wall thicknesses

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The stop is designed to be removable and repositionable, transforming a static locking device into a dynamic one that can adapt to different anchor rod lengths and wall thicknesses. This dynamic feature enables a single locking device type to handle multiple wall thickness scenarios without compromising ease of operation

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If multiple anchor rod lengths are provided to accommodate different wall thicknesses, then the adaptability is improved, but the device complexity and inventory requirements increase

Engineering Contradiction:
Improvewall thickness accommodationVSAvoidinventory management
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The locking device is designed with universal applicability through the removable stop mechanism, allowing a single type of locking device to serve multiple wall thickness requirements (15-40 cm). This eliminates the need for multiple specialized locking device types and simplifies inventory management while maintaining full adaptability

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

Solution Approach 2:

The effective length of the anchor rod is made variable by changing the position of the removable stop rather than changing the anchor rod length itself. This parameter change approach allows the same anchor rod and locking device to accommodate different wall thicknesses, reducing inventory requirements

Inventive Principle:
Principle #35Parameter changes

3Adaptability or versatility

If the anchor rod is inserted deeper into the locking device to increase effective length, then the wall thickness capability is improved, but the precision of positioning deteriorates

Engineering Contradiction:
Improveeffective length adjustmentVSAvoidpositioning accuracy
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The removable stop replaces complex mechanical positioning systems that would be needed to ensure precise anchor rod positioning at different depths. The stop provides a simple, reliable mechanical reference point that ensures accurate positioning without requiring sophisticated adjustment mechanisms, maintaining manufacturing precision while enabling effective length variation

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP2875194B1Locking device having stop for anchor rod and process
Publication Date: 2025.05.14 HUENNEBECK GMBH
  • EP2875194B1 patent drawingFigure 1~3

AI summary

The Invention relates to a locking device for an anchor rod of a wall formwork. Moreover the invention relates to an anchoring system having an anchor rod and a locking device; as well as a process for mounting a wall formwork. The locking device for an anchor rod of a wall formwork comprises a thread for the insertion of one end of the anchor rod and a stop which is removable from its stop position for an anchor rod end which is screwed into the thread.