Maintenance Cart for Push Back Rack Jam Clearing
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Solution Overview
Problem
Push back rack systems in distribution centers often experience jamming issues due to dislodged products, which are difficult to clear safely, leading to reduced storage capacity and potential product expiration, resulting in lost revenue and increased disposal costs.
Innovation Solution
A maintenance and retrieval cart equipped with a base, safety rail, drive mechanism, brake mechanism, and locking system, allowing safe and efficient movement along inclined rails to clear jams and retrieve dislodged items, while ensuring operator safety through adjustable safety features and shelter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual clearing of jams is attempted by climbing into the racking system, then the jam can be cleared, but the risk of falling and injury is extremely high
Solution Approach 1:
The patent introduces a maintenance platform with forklift attachment that serves as an intermediary device between the operator and the racking system. This platform provides safe access to elevated rack locations without requiring operators to climb into the racking structure, thereby eliminating the fall hazard while enabling jam clearing operations at height
Solution Approach 2:
The maintenance system is segmented into distinct functional components: a forklift attachment mechanism for lifting, a maintenance platform for operator positioning, and safety railings for protection. This segmentation allows each component to address specific aspects of the safety problem independently
2Ease of operation
If bridge mounted to forklift is used to reach into racking structure, then front jams can be cleared, but jams located farther back in storage lane cannot be accessed
Solution Approach 1:
The maintenance platform is designed to be dynamically positionable along the inclined rails of the push-back rack system. The platform can be moved to different depths and elevations within the racking structure, allowing operators to access jams at any location rather than being limited to fixed front-access positions
Solution Approach 2:
The maintenance platform serves multiple functions: it can clear jams at various depths, retrieve dislodged products from different locations, and provide safe operator access throughout the racking structure. This multi-functionality replaces the limited single-purpose bridge attachment
3Object-affected harmful factors
If rack sections are taken out of service to clear jams, then operator safety is maintained, but storage capacity is lost and productivity decreases
Solution Approach 1:
The maintenance platform acts as an intermediary that enables safe jam clearing operations without requiring rack sections to be taken offline. By providing safe access to elevated and difficult-to-reach locations, the platform allows continuous operation of the racking system while maintenance is performed
Solution Approach 2:
The system enables preliminary maintenance action to be taken safely before jams cause complete system failure or product expiration. Operators can proactively clear jams and retrieve dislodged products while the rack remains in service, preventing further operational disruption
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 efficient clearing of jams, reducing storage capacity loss and product expiration, thereby enhancing operational efficiency and profitability by allowing safe maintenance and inspection of push back rack systems.
Implementation Method 1
nested racks in the push back rack system allow pallets to be stored up to 6 deep on the nested rack trays which roll on the inclined rails
Implementation Method 2
cart rollers sized and positioned to ride on the inclined rails
Data Source
AI summary
A maintenance and retrieval cart is provided for use with a push back storage rack having a plurality of nested trays riding on a pair of inclined rails. The maintenance and retrieval cart comprises a base with a safety rail secured thereto. The base is supported on an undercarriage which facilitates movement along the inclined rails. A drive mechanism is operatively connected to move the cart along the inclined rails.