Rackable Fence System With Interlocking Pickets
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Solution Overview
Problem
Existing rackable fence systems are complex and costly to manufacture, particularly when installed on sloping ground, as they require intricate designs to maintain picket parallelism with posts, increasing installation time and effort.
Innovation Solution
A fence system with rails featuring channels and lips that form a secure connection with pickets, allowing for rackable sections that remain parallel while minimizing manufacturing complexity and cost, through the use of apertures and connection regions that prevent picket disengagement without physical joining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fence sections are manufactured with pickets pre-installed on rails to reduce installation time, then productivity improves, but device complexity increases due to the need for specialized connection mechanisms
Solution Approach 1:
The fence system is divided into modular sections, each comprising rails with pre-installed pickets. These segmented sections can be manufactured independently and assembled on-site, significantly improving installation productivity while managing complexity through standardization
Solution Approach 2:
Pickets are pre-installed on rails during manufacturing before delivery to the installation site. This preliminary action eliminates the time-consuming step of individually installing pickets on-site, improving productivity while the standardized connection mechanism keeps complexity manageable
2Adaptability or versatility
If fence sections are designed to be rackable to maintain picket parallelism on sloping ground, then adaptability improves, but manufacturing complexity and cost increase
Solution Approach 1:
The fence section incorporates a racking mechanism that allows the rails to translate relative to each other along the slope while maintaining picket parallelism. This dynamic adjustment capability enables adaptation to varying slopes without requiring completely different fence designs for each terrain condition
Solution Approach 2:
The racking mechanism changes the positional parameter of the rails relative to each other, allowing the fence section to accommodate different slope angles. By adjusting the rail positions rather than changing the entire fence structure, adaptability is improved while manufacturing complexity is kept manageable
3Reliability
If pickets are securely connected to rails with lips forming channels to prevent disengagement, then reliability improves, but device complexity increases
Solution Approach 1:
Lips extending into channels formed by the rail surfaces act as intermediary elements that engage with the pickets. These lips provide a simple yet effective mechanism to prevent picket disengagement while maintaining a relatively simple overall connection structure
Solution Approach 2:
The connection mechanism is designed so that the pickets themselves engage with the lips and channels during installation, providing self-retention without requiring additional fasteners or complex locking mechanisms. The geometry of the lips and channels automatically prevents disengagement
Data Source
AI summary
In certain embodiments, a fence system includes a rail having a first surface having one or more apertures. The rail also includes second and third surfaces opposing one another, the first, second, and third surfaces of the rail forming a channel. The second surface and the third surface of the rail have first and second lips, respectively, the first and second lips extending into the channel. The fence system section also includes one or more pickets inserted through corresponding apertures of the first surface of the rail. Each picket has a first connection region located substantially in the channel formed by the first, second, and third surfaces of the rail such that the first connection region is substantially prevented from passing through the corresponding aperture in the first surface of the rail or between the opening defined by the first and second lips of the rail.