Adjustable Door Closer Arm for Accurate Hinge-Pivot Alignment
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Solution Overview
Problem
Existing door closer installations are prone to inaccuracies due to difficulties in positioning the hinge axis and pivot axis, leading to suboptimal performance and requiring re-drilling of holes, which complicates and increases costs.
Innovation Solution
An adjustable arrangement for a door closer that allows for post-fixation adjustment of the pivot axis distance relative to the hinge axis, enabling accurate installation and flexible mounting for different door widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If paper templates or mounting plates are used to guide hole drilling, then manufacturing precision of hole positions is improved, but device complexity and installation time increase
Solution Approach 1:
The door closer arm is designed with adjustable positioning capabilities, allowing the pivot axis position to be dynamically adjusted after installation. This eliminates the need for precise pre-drilling guidance tools while maintaining accurate positioning through post-installation adjustment mechanisms.
Solution Approach 2:
The system allows changing the position parameter of the pivot axis after installation by adjusting the arm's position relative to the door leaf. This parameter adjustment capability replaces the need for complex guidance tools during the installation process.
2Manufacturing precision
If paper templates are used to guide drilling, then hole position accuracy is improved, but installation time is increased due to folding, taping, and adapting the template
Solution Approach 1:
The guidance function is extracted from the installation process itself and integrated into the door closer arm structure. The adjustable positioning features of the arm provide inherent guidance during installation, eliminating the need for separate paper template preparation and application steps.
3Manufacturing precision
If mounting plates are used to assist drilling, then hole position accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The mounting plate function is merged with the door closer arm structure itself. The arm incorporates adjustable positioning features that serve both as the functional component and as the installation guidance mechanism, eliminating the need for separate mounting plates.
4Measurement precision
If holes are drilled with tight tolerances to ensure accurate door closer positioning, then pivot axis positioning accuracy is improved, but installation time and difficulty increase
Solution Approach 1:
The system transitions from a static positioning approach (requiring precise pre-drilled holes) to a dynamic adjustment approach. The door closer arm can be adjusted after installation to achieve accurate pivot axis positioning, making the installation process more forgiving and easier to perform.
Data Source
AI summary
An arrangement for closing an access member rotatable relative to a frame about a hinge axis, the arrangement comprising a primary element for fixation to either the frame or the access member; a secondary element for fixation to the other of the frame and the access member; a connection device arranged between the primary element and the secondary element and engaging the secondary element; and a force device comprising a drive element rotatable about a pivot axis and engaging the connection device, the force device being arranged to force rotation of the connection device relative to the primary element about the pivot axis, wherein a position of the force device relative to the primary element is adjustable after fixation of the primary element and the secondary element to adjust a distance between the pivot axis and the hinge axis. An access member system and a method are also provided.