Hollow Slat Shaft Tensioning Cable for Beam Bulging
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Solution Overview
Problem
Slat roofs with rotatable slats face issues of beam bulging under the weight and bending of slats, leading to increased material costs and aesthetic concerns when using heavier slats or larger covers.
Innovation Solution
Incorporating a hollow slat shaft with a tensioning cable that is fixed to the beams, allowing the slats to rotate while counteracting bulging, and using tensioning means to adjust the cable tension for optimal support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If beams are designed to be sturdier to prevent bulging, then beam strength is improved, but material cost and device complexity increase
Solution Approach 1:
The beam support system is segmented into multiple tensioning cables distributed across the slat roof structure, with each cable independently tensioned to counteract local bulging forces. This segmentation allows the use of thinner, less expensive beams while maintaining overall structural integrity through distributed reinforcement.
Solution Approach 2:
Tensioning cables are introduced as intermediary elements between the beams and the slats, acting as mediators to transfer and distribute the loads. These cables prevent beam bulging by providing tensile reinforcement without requiring the beams themselves to be made sturdier or more expensive.
2Strength
If heavier slats are used to increase durability, then slat strength is improved, but beam bulging increases
Solution Approach 1:
The tensioning cables provide an upward counteracting force that balances the downward weight of heavy slats. By pre-tensioning the cables, the system creates a counterweight effect that offsets the gravitational load on the beams, allowing heavy durable slats to be used without excessive beam stress or bulging.
3Stability of the object's composition
If beams are placed at an incline to counter bulging, then beam stability is improved, but connection difficulty increases
Solution Approach 1:
Instead of inclining the beams to counter bulging (which creates connection difficulties), the invention inverts the approach by keeping beams horizontal and introducing tensioning cables at an angle or with pre-tension to provide the counteracting force. This maintains ease of beam connection while still preventing bulging through the cable tension mechanism.
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
This solution effectively prevents beam bulging while maintaining the slats' rotatability and aesthetic appeal, allowing for adjustable tensioning to accommodate varying slat weights and sizes without increasing material costs.
Implementation Method 1
at least one slat shaft is hollow and wherein the slat roof comprises at least one corresponding tensioning cable which is inserted through said hollow slat shaft and the ends of which are fixed to the respective beams
Implementation Method 2
Using such a tensioning cable, it is possible to keep the beams in place in a simple manner counter to the bulging caused by the weight and bending of the slats
Data Source
AI summary
A slat roof (1) comprising beams (2), a plurality of slats (3) arranged parallel to one another therebetween and slat shafts (4) by means of which the slats (3) are rotatably fixed to the respective beams (2), wherein at least one slat shaft (4) is hollow and wherein the slat roof (1) comprises at least one corresponding tensioning cable (5) which is inserted through said hollow slat shaft (4) and the ends of which are fixed to the respective beams (2). In addition, a method for adapting a slat roof.