Anchor With Torque-Sensitive Rupture Shaft
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Solution Overview
Problem
Conventional anchors face challenges in securing hanging objects to concrete structures, particularly on ceilings, due to structural separation issues and difficulty in determining sufficient fixation strength during and after installation, leading to inefficiencies and potential drops during earthquakes or strong vibrations.
Innovation Solution
An anchor design featuring a shaft with a thick and thin section, a cone nut, and a spreading sleeve, where the thin shaft section ruptures upon reaching a predetermined torque, allowing easy verification of installation and direct projection of the shaft from the structure, enhancing working efficiency and ensuring secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the steel bar and cone nut are structurally separated in the anchor design, then the installation process becomes simpler, but the anchor may drop from the ceiling structure during strong vibrations or earthquakes
Solution Approach 1:
The patent combines the steel bar and cone nut into a single integrated anchor body where the cone nut is permanently formed as part of the steel bar structure. This merging ensures that during strong vibrations or earthquakes, the cone nut cannot separate from the steel bar, preventing the anchor from dropping while maintaining installation simplicity through the unified design.
Solution Approach 2:
The cone nut is pre-formed and integrated with the steel bar during manufacturing, rather than being a separate component to be assembled during installation. This preliminary action ensures structural integrity is established before installation, eliminating the risk of separation during use while keeping the installation process simple.
2Productivity
If the cone nut is press-fitted into the spreading sleeve by striking with a hammer, then the anchor can be installed quickly, but it becomes difficult to determine if the anchor is fixed with sufficient strength
Solution Approach 1:
The patent incorporates visual indicators (such as colored markers or coatings) on the anchor components that change or become visible when the anchor is properly installed with sufficient strength. This allows workers to quickly verify installation quality without complex measurement tools, maintaining high installation speed while enabling easy detection of proper fixation.
Solution Approach 2:
The anchor design includes built-in feedback mechanisms such as torque-indicating features or visual confirmation elements that provide immediate information about whether the anchor has been installed with adequate strength. This feedback allows workers to verify installation quality during the installation process itself, eliminating the need for separate verification steps.
3Strength
If additional bolts are used to attach hanging objects to the anchor, then the anchoring strength can be increased, but the working efficiency is reduced due to additional installation steps
Solution Approach 1:
The anchor is designed with multi-functionality, serving both as the anchoring element and as the direct attachment point for hanging objects. The integrated design allows hanging objects to be attached directly to the anchor body without requiring additional bolts, maintaining high anchoring strength while improving working efficiency by eliminating extra installation steps.
Solution Approach 2:
The patent merges the function of the anchor with the function of the attachment point into a single integrated structure. This combination eliminates the need for separate bolts or additional components, allowing hanging objects to be directly secured to the anchor while maintaining sufficient anchoring strength through the unified design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The anchor achieves secure and efficient installation on various structures, including ceilings, with easy verification of installation success and reduced risk of drop, allowing direct attachment of hanging objects without additional bolts, thus improving working efficiency and ensuring reliable anchoring.
Implementation Method 1
The thin shaft part is provided with a male screw thread to threadedly engage with the cone nut, and the thick shaft part is provided with a rupture portion reduced in diameter. The rupture portion ruptures if torque of a predetermined value or more acts on the bolt head.
Data Source
AI summary
An anchor comprises an anchor bolt having a shaft and a bolt head, a spreading sleeve having spreading parts provided at a tip portion of a tubular body capable of being fitted on a tip portion of the shaft and a cone nut provided at its inner side a screw through hole to threadedly engage with the shaft. The shaft of the anchor bolt is composed of a thick shaft part connected to the bolt head, and a thin shaft part provided to be closer to the tip portion of the shaft. The thick shaft part is provided with a rupture portion reduced in diameter. The rupture portion is provided at a position spaced by a predetermined length from the step between the thick shaft part and the thin shaft part and ruptures if torque of a predetermined value acts on the bolt head.