Variable Geometry Snow Guard for Roof Protection
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Solution Overview
Problem
Existing snow guards on sloping roof surfaces are difficult to adjust when covered in snow, leading to unsafe and time-consuming maintenance, and they often obstruct the sliding of snow, causing damage to gutters and solar/photovoltaic collectors.
Innovation Solution
A snow guard with variable geometry, featuring rotatable arms and a drive mechanism that allows the grid to pivot from an active overhanging position to a passive position against the roof surface, enabling controlled snow sliding and adjustment parallel to the eaves line, with optional heating and remote operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the snow guard is fixed in an erected position to retain snow, then snow retention effectiveness is improved, but it obstructs pedestrian/vehicle traffic and blocks solar collectors
Solution Approach 1:
The snow guard employs a movable grid structure that can dynamically change position between an erected active position for snow retention and a retracted passive position for unobstructed access. The grid is mounted on rotatable arms that allow it to pivot between these positions, enabling the system to adapt its function based on operational requirements.
2Reliability
If the snow guard remains in the active position to prevent snow sliding, then roof protection is improved, but gutters and solar collectors are damaged by retained snow
Solution Approach 1:
The snow guard operates through periodic position changes, alternating between the active erected position for protection and the passive retracted position to allow controlled snow release. This periodic action enables the system to provide protection when needed while periodically releasing snow to prevent damage to gutters and collectors.
3Adaptability or versatility
If the snow guard structure is made complex to enable movement and adjustment, then adaptability is improved, but device complexity increases
Solution Approach 1:
The snow guard system is divided into modular components: fixed supports attached to the roof, rotatable arms providing movement capability, and the movable grid structure itself. This segmentation allows each component to perform its specific function independently, simplifying the overall design while maintaining adaptability.
4Ease of manufacture
If manual adjustment of the snow guard is required, then ease of manufacture is improved, but maintenance becomes time-consuming and risky
Solution Approach 1:
The manual mechanical adjustment system is replaced with an automated control mechanism that can pivot the grid between positions without requiring personnel to climb onto the roof. This substitution eliminates the safety risks and time consumption associated with manual adjustment while maintaining the position-changed functionality.
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
Enables safe and controlled snow removal without obstructing pedestrian or vehicle traffic, protecting gutters and solar/photovoltaic collectors from snow damage, while allowing for easy adjustment and operation even in snowy conditions.
Implementation Method 1
The movable arms can be heated, for example by means of heating cables, in order to melt any ice that might impede their movement
Data Source
AI summary
The guard has a profile (3), a rod or a grid element, which are supported by arms (2) that are held perpendicular to a roof surface (C) of a roof. The arms are pivoted such that the arms take an active position, which is distant from the active area roof surface, to prevent sliding of snow layer in a direction of eave line. The arms takes a passive position, which lies at the roof surface, to promote spontaneous or provoked slipping of the snow layer, where the guard takes an intermediate positions to decelerate and stooping of sliding of the snow layer.