Plastic Anchor Rod Holder Assembly for Moisture Isolation
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Solution Overview
Problem
Existing reinforced building walls using threaded rods anchored to the foundation face issues with corrosion due to moisture exposure, especially during concrete pouring, which can compromise structural integrity and durability.
Innovation Solution
The development of a plastic-made concrete anchor rod holder with a head and base portion, featuring a moisture barrier and adjustable couplers to protect the rod from corrosion, ensuring proper thread engagement and alignment with concrete structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal rod holders are used to anchor threaded rods to the foundation, then the structural strength and anchoring capability are improved, but the rod holders are susceptible to corrosion from moisture exposure during concrete pouring, compromising durability
Solution Approach 1:
The patent introduces a plastic rod holder as an intermediary component between the threaded rod and the concrete foundation. This plastic holder serves as a mediator that provides both anchoring capability through its design features (flanges, protrusions) and corrosion resistance through its material properties, eliminating the need for metal components that would be exposed to moisture during concrete pouring.
Solution Approach 2:
The patent changes the material parameter of the rod holder from metal to plastic. This material substitution fundamentally alters the corrosion resistance parameter while maintaining or achieving sufficient anchoring capability through design modifications such as adding flanges and protrusions that engage with the concrete and threaded rod respectively.
2Reliability
If the rod holder is elevated from the base portion to protect the rod from moisture, then the corrosion protection is improved, but the alignment precision and positioning accuracy with concrete structures may be compromised
Solution Approach 1:
The patent uses the vertical dimension (elevation) to solve the corrosion protection problem by raising the rod holder above the concrete surface. The alignment precision is maintained through properly designed protrusions and flanges that extend in horizontal dimensions to engage with the threaded rod and concrete structure respectively, thus solving both corrosion protection and alignment precision through multi-dimensional design.
Solution Approach 2:
The rod holder is designed with pre-formed protrusions and flanges that are positioned and sized to ensure proper alignment with the threaded rod and concrete structure before the concrete is poured. This preliminary design ensures that when the concrete cures, the rod holder is automatically aligned correctly, maintaining manufacturing precision while achieving corrosion protection through elevation.
3Strength
If the coupler thread engagement depth is increased to ensure secure connection, then the connection strength is improved, but the adjustability range for height adjustment is reduced
Solution Approach 1:
The coupler is segmented into distinct functional zones: a first portion with deep thread engagement for secure connection to the threaded rod, and a second portion providing height adjustment capability. This segmentation allows the coupler to simultaneously achieve strong mechanical connection and vertical adjustability by distributing different functions to different segments of the same component.
Solution Approach 2:
The coupler design nests multiple functions within a single component structure. The threaded portion for engagement is nested within the overall coupler body, which also contains the height adjustment mechanism. This nested design allows the coupler to provide both deep thread engagement for strength and additional vertical travel for adjustment range within a compact integrated structure.
Data Source
AI summary
A holder for a rod to be embedded in concrete includes a head portion elevated from a base portion by a support portion; the head portion including an opening for receiving an end portion of a rod; and the base portion for being attached to a concrete form surface, the holder being made of plastic to protect from corrosion the end portion of the rod.