Pivoting Fastening Element for Adjustable Rafter Attachment
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Solution Overview
Problem
Existing fastening systems for rafters to carriers, such as wall connection brackets, lack variability and adaptability, particularly in accommodating corner angles and varying roof structures, requiring complex adjustments or modifications like sawing rafters at angles.
Innovation Solution
A fastening element with a base plate and a connection device featuring a pivot joint allows the rafter to be pivoted relative to the carrier, enabling adjustable attachment without extending the support structure, and includes a connection device with elongated holes for variable fastening, facilitating assembly and adaptability to different angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed fastening system is used to attach rafters to carriers, then the structure is simple and stable, but it lacks adaptability to different roof geometries and corner angles
Solution Approach 1:
The fastening element incorporates a pivot joint that enables dynamic adjustment of the rafter angle relative to the carrier. The base plate can rotate about a pivot axis, allowing the system to adapt to various roof geometries and corner angles while maintaining a relatively simple fastening structure.
Solution Approach 2:
The fastening element is divided into distinct functional components: a base plate for attachment to the rafter, a connection device for connecting to the carrier, and a pivot joint mechanism. This segmentation allows each component to perform its specific function while providing overall adaptability through the pivot joint.
2Adaptability or versatility
If complex adjustments are made to accommodate corner angles, then adaptability is improved, but assembly difficulty and time increase
Solution Approach 1:
The pivot joint provides a straightforward rotational mechanism that allows installers to easily adjust the rafter angle to accommodate corner angles and different roof geometries without complex procedures or specialized tools.
Solution Approach 2:
The fastening element is designed to be self-adjusting through its pivot joint mechanism, which naturally accommodates different angles without requiring additional adjustment components or complex assembly procedures.
3Adaptability or versatility
If rafters are sawn at angles to fit corners, then adaptability is improved, but manufacturing complexity and time increase
Solution Approach 1:
The pivot joint transfers the adaptability requirement from the rafter itself to the fastening mechanism, allowing rafters to be manufactured in standard straight forms without requiring angle cutting or complex processing.
Solution Approach 2:
The fastening element serves multiple functions: it attaches the rafter to the carrier, provides angular adjustment capability, and accommodates various roof geometries. This multi-functionality eliminates the need for specialized rafter processing while achieving adaptability.
Data Source
AI summary
The attachment element (100) has base element (200) and a connecting unit (300) for connecting attachment element to the support. A hinge is provided between the base plate and the connecting unit by which the base element is movable relative to the connecting unit about a pivot axis (150). An independent claim is included for roofing.