Dock Door Wheel-and-Axle Assembly with Angled Track Sidewalls
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Solution Overview
Problem
Loading dock doors often sustain damage when struck by forklifts due to their robust design, which makes them heavier and more costly, and existing break-away systems are complex and prone to breakage.
Innovation Solution
A dock door system with angled track sidewalls and spring-loaded wheel assemblies that allow the door to self-release from its tracks upon impact, reducing damage and enabling easy reinstallation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If loading dock doors are built stronger using heavier gauge metals and braces to withstand forklift strikes, then the door's strength and durability improve, but the door's weight and cost increase
Solution Approach 1:
The door system is divided into separable components: the door can release from the track system. This segmentation allows the door to be designed without excessive reinforcement, as it can escape damage by detaching rather than absorbing all impact forces through its structure.
Solution Approach 2:
The impact force from forklift strikes, which is harmful to traditional doors, is converted into a beneficial release mechanism. When struck with sufficient force, the door automatically releases from the tracks, using the harmful impact energy to trigger a protective disengagement rather than requiring the door to withstand the full force.
2Strength
If loading dock doors are built stronger using heavier gauge metals and braces to withstand forklift strikes, then the door's strength and durability improve, but the manufacturing cost increases
Solution Approach 1:
By segmenting the door system into detachable components, the door itself can be manufactured with lighter, less expensive materials. The track system serves as the protective element rather than the door, allowing for cost-effective manufacturing of the door while maintaining overall system durability.
Solution Approach 2:
The door is designed as a replaceable component that can be quickly swapped after impact. Rather than investing in expensive, heavily reinforced doors, the system uses a simpler, more economical door that can be replaced if necessary, reducing manufacturing costs while maintaining operational reliability.
3Ease of operation
If wheel assemblies are designed with break-away pivot points to allow door release from tracks, then the door can self-release upon impact, but the wheel assemblies become complicated, expensive and prone to breakage
Solution Approach 1:
The release functionality is extracted from the complex wheel assembly pivot system and implemented through the simple geometric interaction between the wheel and the angled track sidewalls. The release mechanism is taken out of the wheel assembly itself and placed in the track geometry, dramatically simplifying the wheel components.
Solution Approach 2:
Instead of designing complex break-away mechanisms within the wheel assembly, the invention inverts the approach by designing the track to actively push the wheel outward through its angled sidewalls. The release action is initiated by the track geometry rather than by a mechanism within the wheel itself.
4Device complexity
If traditional door systems are used without self-release capability, then the door structure remains simple, but the door sustains damage and cannot be easily opened after being struck
Solution Approach 1:
The door system is segmented into detachable parts, allowing the door to separate from the tracks after impact. This segmentation enables the door to be easily removed and replaced if damaged, rather than requiring complex repairs or adjustments to the door itself or its mounting system.
Solution Approach 2:
The system allows for the discarding of the door from the track system after impact, enabling quick removal of damaged doors and replacement with new or repaired units. The tracks remain in place and can continue to support new doors, recovering the valuable track infrastructure while replacing only the affected door component.
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
The system effectively reduces door damage by allowing self-release from tracks upon strong force impact, facilitating quick reinstallation and maintaining operational integrity without the need for complex and costly components.
Implementation Method 1
Each of the first plurality of wheel-and-axle assemblies comprises a first wheel and a first axle, the first wheel biased to a position on the first axle by a biasing mechanism so as to ride in the first track
Implementation Method 2
The first plurality of wheel-and-axle assemblies is configured to allow each of the first wheels to move out of the first track on the first sidewall if the door is struck with sufficient force
Data Source
AI summary
A system for allowing a loading dock door to release from guide tracks. The dock door includes wheel-and-axle assemblies which are mounted to the door and which include wheels biased towards a position in the tracks. At least one of the tracks has a cross sectional profile which enables the wheels disposed in the one of the tracks to move out of the one of the tracks when the door is struck with sufficient force.