Through-Opening Fastener for Concrete Anchoring
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Solution Overview
Problem
Existing fastening elements for hard constructional components like concrete and masonry are costly to manufacture due to complex engagement means at the receptacle bottom, limiting their suitability for mass production and inability to function as self-drilling elements in hard materials.
Innovation Solution
The engagement means is formed as a through-opening in the bottom section of the fastening element, allowing for flexible manufacturing and enabling the space behind the element to be filled with mortar, with the load application means extending up to the engagement point to facilitate torque transmission, and a conical or spherical transition region for enhanced bit engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engagement means is formed at the bottom of the receptacle as in prior art, then the fastening element can be anchored in hard constructional components, but the manufacturing costs increase and manufacturing possibilities are limited
Solution Approach 1:
The engagement means is segmented into two functional parts: a through-opening in the bottom section for setting bit engagement, and a receptacle for load application. This segmentation allows the through-opening to be formed independently during manufacturing, simplifying the production process while maintaining anchoring capability.
Solution Approach 2:
Instead of forming the engagement means as a blind hole at the bottom of the receptacle (prior art), the invention inverts the approach by creating a through-opening that passes completely through the bottom section. This inversion allows the engagement means to be formed during the base body manufacturing process itself, rather than requiring additional post-processing steps.
2Reliability
If complex engagement means are used at the receptacle bottom, then anchoring in hard components is achieved, but mass production economy is compromised
Solution Approach 1:
The through-opening forming process is merged with the base body manufacturing process. The engagement means is created as an integral part of the base body formation, eliminating separate manufacturing steps and enabling economical mass production while maintaining reliable anchoring strength in hard constructional components.
3Reliability
If the fastening element is designed for hard constructional components, then it can be anchored in concrete and masonry, but it cannot function as a self-drilling element
Solution Approach 1:
The fastening element achieves multi-functionality by combining a self-tapping thread for anchoring in hard components with a through-opening engagement means that can accommodate various setting bits. This design allows the same element to be used both for self-tapping installation in concrete/masonry and for insertion into pre-drilled holes, eliminating the need for separate self-drilling and non-self-drilling variants.
Data Source
AI summary
A fastening element for hard constructional components such as concrete, masonry, and the like, includes a cylindrical base body (22; 42; 62) having an inwardly located engagement element (28; 48; 68) for the setting bit and formed as a through-opening (31; 51; 71) in the bottom section (23; 43; 63) which is provided at the first end of the base body, a receptacle (29) opening toward the second end (25), remote from the first end and adjoining the engagement element (28; 48; 68) in a direction toward the second end (25), and provided with load application means (30; 50); and a self-tapping thread (27) provided, at least regionwise, on an outer surface (26) of the base body (22, 42; 62).