Composite Anchor Plates for Concrete Slab Lifting
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Solution Overview
Problem
Existing anchors for lifting concrete slabs are complex and costly to manufacture due to their three-dimensional configurations, often requiring additional steps like welding, which reduces productivity and increases costs.
Innovation Solution
A pair of elongated plates with bent flanges and laterally projecting feet, manufactured through simple processes like stamping and bending, forming a composite anchor that can be easily assembled without complex steps like welding, using thinner metal plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If three-dimensional anchor configurations with wing attachments are used, then lifting strength and pull-out resistance are improved, but manufacturing complexity and cost increase due to additional steps like welding
Solution Approach 1:
The anchor is divided into multiple flat plates (typically three plates) that are positioned at angles to each other within the concrete substrate. Each plate provides pull-out resistance through its orientation, and the segmented design allows for simpler manufacturing of individual flat components that can be assembled without complex welding operations.
Solution Approach 2:
The invention transitions from traditional three-dimensional winged anchor structures to a multi-planar arrangement of flat plates. By distributing the anchor elements across multiple two-dimensional planes at different orientations, the system achieves three-dimensional pull-out resistance while maintaining simpler, flat manufacturable components.
2Strength
If traditional three-dimensional anchors with wing attachments are used, then lifting capability is improved, but manufacturing time and productivity are reduced due to complicated assembly steps
Solution Approach 1:
The anchor system is segmented into multiple independent flat plates that can be manufactured separately using simple processes and then assembled. This segmentation enables parallel manufacturing of components and simplifies assembly operations, thereby improving overall manufacturing productivity while maintaining lifting capability.
Solution Approach 2:
The invention changes the geometric parameters of the anchor from complex three-dimensional winged structures to flat plates with specific orientations. This parameter change allows for faster manufacturing of individual components and simplifies the assembly process, directly improving manufacturing productivity.
3Strength
If anchors are made from bar stock, then strength is improved, but ease of manufacture deteriorates due to difficulty in working the material into three-dimensional configurations
Solution Approach 1:
The invention moves from three-dimensional anchor forms to a multi-planar arrangement of flat plates. These flat plates can be easily manufactured from sheet metal or plate stock using conventional forming and cutting processes, significantly improving ease of manufacture while maintaining structural strength through proper orientation and configuration.
Solution Approach 2:
The material form parameter is changed from bar stock to plate or sheet material. This parameter change enables easier manufacturing through standard cutting, bending, and forming operations, while the strength requirement is met through the multi-planar geometric configuration and material orientation.
Data Source
AI summary
An anchor for embedment in a concrete slab to provide for the lifting of the slab comprises first and second elongate plates adapted to be arranged in facing relationship for form a composite anchor. Each of the first and second plates has a distal end and a proximate end and at one hole between the distal and proximate ends. The proximate end of each plate has a flange bent outwardly of the outer planer face thereof. The distal end of each plate has laterally projecting feet that are bent laterally of a planar face. The side edges of each of the plates have converging side edges that extend downwardly to the feet.