Ladder Rack Hinge Guide Assemblies for Vehicle Roof Loading
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Solution Overview
Problem
Conventional ladder racks for vehicles require awkward and dangerous lifting and manipulation, leading to potential damage and injury during loading and unloading, as they are often complex, expensive, and bulky, making it difficult to move ladders between storage and loading/unloading positions.
Innovation Solution
A ladder rack with a frame assembly and a bed platform connected by hinge guide assemblies that allow for sliding and pivoting movements, enabling easy transfer of ladders between stowage and loading/unloading positions without lifting the full weight, using extendible and pivotable hinged guide assemblies to position the ladder along the side of the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional ladder racks are used for vehicle roof mounting, then ladder storage capacity is achieved, but the complexity and bulkiness of the system increases
Solution Approach 1:
The ladder rack system is divided into separate functional components: a base assembly mounted to the vehicle, a bed assembly that can move independently, and hinge guide assemblies that connect them. This segmentation allows each component to be optimized independently and simplifies the overall system while maintaining storage capacity.
Solution Approach 2:
The bed assembly is designed to be movable rather than fixed, transitioning between a stowage position (for storage) and a loading/unloading position (for access). This dynamic capability eliminates the need for complex fixed structures while maintaining both storage and access functions.
2Quantity of substance
If conventional ladder racks require lifting ladders onto high positions, then storage capacity is achieved, but the difficulty and danger of manual manipulation increases
Solution Approach 1:
The hinge guide assemblies and bed platform configuration create a near-ground level loading position, eliminating the need to lift ladders to high positions. The bed assembly can be positioned at ground level or close to it, making loading and unloading as easy as placing the ladder on a flat surface.
Solution Approach 2:
The bed assembly acts as an intermediary platform between the ground and the vehicle roof storage position. It provides a stable, near-ground loading surface that transitions to the elevated stowage position, eliminating direct lifting to height while maintaining storage capacity.
3Ease of operation
If the bed platform is extended downward for easy loading, then ease of operation improves, but the weight and complexity of the rack system increases
Solution Approach 1:
The hinge guide assemblies enable the bed platform to dynamically extend downward only when needed for loading/unloading, then return to a compact position during transport. This dynamic extension eliminates the need for permanently extended heavy structures while maintaining ease of operation.
Solution Approach 2:
The extension capability is extracted as a separate functional feature provided by the hinge guide assemblies, rather than being built into the entire rack structure. Only the necessary components extend, minimizing additional weight while providing the loading advantage.
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
Facilitates safe and easy loading and unloading of ladders by distributing the weight and reducing manual lifting effort, preventing injury and damage, while allowing for efficient movement between storage and loading positions.
Implementation Method 1
hinge guide assemblies which are both slidingly and pivotally coupled to the frame assembly
Implementation Method 2
hinge guide assemblies which are both slidingly and pivotally coupled to the frame assembly
Implementation Method 3
at least one of the hinge assemblies being extendible in a pivoted position with respect to the frame assembly
Data Source
AI summary
A ladder rack for supporting a ladder in a stowage position and for moving the ladder between the stowage position and a loading/unloading position at which the ladder can be loaded onto the rack or unloaded from the rack. The ladder rack includes a frame assembly which is mounted on a support structure such as a vehicle roof and a bed platform having opposite ends that are coupled to the frame assembly for sliding and hinged movement with respect to the frame assembly. At least one of the ends of the bed platform is configured to be extendible when pivoted downward into a loading or unloading position.