Universal Rear Anchor for Vertical Formwork Tie Rods
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Solution Overview
Problem
Existing vertical formworks require multiple anchors and tie rods with different core diameters to accommodate varying concrete pressures, necessitating complex and time-consuming adjustments during construction.
Innovation Solution
A vertical formwork design featuring a rear anchor with a threaded hole having two segments with different internal core diameters, allowing the same anchor to accommodate tie rods with either Dywidag® 15 or Dywidag® 20 features, enabling adjustment from one side and reducing the need for multiple anchors and parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple anchors with different core diameters are used to accommodate varying concrete pressures, then the formwork can withstand different concrete pressures, but the device complexity and number of parts increase
Solution Approach 1:
The rear anchor is designed with a universal threaded hole that accepts both Dywidag® 15 and Dywidag® 20 tie rods through a multi-segment threaded structure. The threaded hole contains a first segment with coarser threads for Dywidag® 15 tie rods and a second segment with finer threads for Dywidag® 20 tie rods, allowing a single anchor to perform multiple functions and accommodate different concrete pressure requirements without needing multiple specialized anchors.
Solution Approach 2:
The threaded hole of the rear anchor is divided into multiple segments along its length, with each segment having different thread characteristics (pitch and diameter). The first segment has coarser threads suitable for Dywidag® 15 tie rods, while the second segment has finer threads for Dywidag® 20 tie rods. This segmentation allows the same physical anchor to interface with different tie rod types based on which segment the tie rod engages with.
2Adaptability or versatility
If multiple tie rod types with different core diameters are used, then the formwork can be adapted to different concrete pressures, but the adjustment time and operation complexity increase
Solution Approach 1:
The rear anchor's threaded hole is designed to universally accept both Dywidag® 15 and Dywidag® 20 tie rods without requiring operator intervention to switch anchors or reconfigure the anchor itself. The multi-segment threaded structure automatically adapts to the inserted tie rod type, reducing adjustment time and simplifying the operation while maintaining adaptability to different concrete pressure requirements.
3Ease of operation
If anchors are fixed to formwork panels before panels are arranged in concreting position, then the formwork can be adjusted from one face, but the thread configuration must accommodate different tie rod types
Solution Approach 1:
The rear anchor is designed as a universal component that maintains one-face adjustment capability while simultaneously accommodating both Dywidag® 15 and Dywidag® 20 tie rod types. The threaded hole's multi-segment structure with different thread pitches allows the anchor to interface with either tie rod type without requiring different anchor configurations, thus preserving ease of operation from one face while achieving broad tie rod compatibility.
Data Source
AI summary
According to one embodiment a vertical formwork is provided that includes at least one front formwork panel and one rear formwork panel that are arranged facing one another. The vertical form work also includes a rear anchor fixed to the rear panel, a front anchor fixed to the front formwork panel, and one tie rod (6) fixed to the front anchor and to the rear anchor. The rear anchor includes a support configured to be fixed to the rear formwork panel, and a nut coupled to said support. The nut includes a threaded hole configured for housing the threaded end of a tie rod. The threaded hole of the nut includes a first segment with an internal thread with a first core diameter and a second segment with an internal thread with a second core diameter, the first core diameter being greater than the second core diameter.