Dome Plate Anchor Rod Locking Device for Misaligned Concrete Wall Forms
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Solution Overview
Problem
Existing anchor systems for concrete wall forms face difficulties in aligning anchor insertion holes, leading to oblique anchor rod insertion and concentrated loading on locking devices, which complicates the assembly and increases the risk of damage during concrete casting.
Innovation Solution
A locking device with a dome plate and screw nut element providing radial play and a tubular guidance facility, allowing the screw nut element to pivot and distribute compressive forces evenly, along with an anti-rotation lock for secure screwing without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If anchor rods are inserted through misaligned anchor insertion holes, then the assembly process can proceed without precise alignment, but the anchor rod becomes oblique and forces are concentrated at one point on the locking device
Solution Approach 1:
The locking device incorporates a spherical bearing surface that allows the anchor rod to be inserted at various angles. The spherical geometry enables angular adjustment and accommodation of misaligned holes while maintaining stable contact and distributing forces across the spherical interface rather than concentrating them at a single point.
Solution Approach 2:
The locking device is designed with dynamic adjustment capabilities, allowing it to adapt its orientation and position to accommodate oblique anchor rod insertion. The device can rotate and tilt to match the angle of the inserted rod, transforming a static rigid connection into a dynamic adaptable joint that maintains force distribution integrity.
2Manufacturing precision
If locking devices are rigidly fixed to form elements, then positioning precision is improved, but the device cannot accommodate misaligned anchor holes and forces concentrate at one point
Solution Approach 1:
The spherical bearing surface provides a precisely manufactured reference geometry that maintains positioning accuracy while enabling angular adaptation. The spherical shape is manufactured with high precision to ensure consistent contact and force distribution, yet its geometric properties allow the device to accommodate various insertion angles without compromising positioning integrity.
Solution Approach 2:
The locking device is divided into separable components with independent degrees of freedom. The spherical bearing surface acts as an intermediate element that can rotate and adjust independently from the main body, allowing the device to maintain precise positioning while adapting to misaligned holes through controlled movement of the segmented spherical component.
3Force
If the screw nut element is rigidly positioned in the dome plate, then force transmission is direct and efficient, but the device cannot accommodate oblique anchor rod insertion
Solution Approach 1:
The spherical bearing surface creates a point contact between the screw nut element and the dome plate that allows rotational movement. This spherical interface maintains efficient force transmission through direct contact while enabling the screw nut element to rotate and adjust its orientation to accommodate oblique anchor rod insertion angles.
Solution Approach 2:
The spherical bearing surface acts as an intermediary element between the screw nut element and the dome plate. It mediates the interaction by allowing rotational adjustment while maintaining force transmission, serving as a flexible interface that accommodates angular misalignment without compromising the efficiency of force transfer from the anchor rod to the locking device.
Data Source
AI summary
A locking device (20,21) for an anchor rod (2) of an anchor system of a concrete wall form, has a screw nut element for screwing the anchor rod through a screw thread of the screw nut element. A dome plate can be fastened to a back of a form element (5,6) of the concrete wall form by means of fastening elements (30) and has a spherically shaped plate section with an opening in which the screw nut element is arranged so as to have radial play. The screw nut element has a groove-type radial seat which accommodates the edges of the opening in the spherical plate sections.