Trackless Shelf Pusher Mechanism That Resists Debris Jamming
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Solution Overview
Problem
Existing merchandising systems face issues with debris and sticky substances obstructing inclined trays and pusher systems, causing products to tip over or fail to move forward, and pusher paddles bending or tipping, which hinders effective product display and accessibility.
Innovation Solution
A trackless pusher mechanism with a pusher paddle and a coiled spring attached to a tray, where the spring passes through a notch in the pusher floor, preventing the paddle from tipping and using the product weight to ensure proper pushing, and a surface with apertures and ribs for easy product movement and debris passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a track-mounted pusher system is used, then the pusher can effectively push product forward, but the track becomes obstructed with debris and sticky materials over time, hindering proper operation
Solution Approach 1:
The patent removes the track component from the pusher system entirely. The pusher paddle is no longer mounted to a track but instead moves freely along the shelf surface, eliminating the track that accumulates debris and causes operational failures.
Solution Approach 2:
The pusher system is segmented into independent components: the pusher paddle, the spring mechanism, and the mounting structure. This segmentation allows the pusher to operate without a continuous track, with the spring providing the pushing force independently.
2Productivity
If a coiled spring is used to urge the pusher paddle forward, then the pusher mechanism can effectively move product, but the pusher paddle may tip or bend backwards causing binding
Solution Approach 1:
The spring is positioned and pre-loaded in a specific configuration before operation begins. The spring is mounted to engage the pusher paddle at a point that prevents backward tipping, and the pre-compression ensures the paddle maintains proper orientation during the pushing action.
Solution Approach 2:
The pusher paddle has different structural properties at different locations - it is reinforced or shaped differently at the spring engagement point versus the product contact point. This local variation in structure prevents tipping and bending while maintaining effective product pushing capability.
3Productivity
If an inclined tray is used to move product forward through gravity, then product can easily slide to the front, but the surface becomes obstructed with debris and sticky substances that inhibit sliding
Solution Approach 1:
The patent eliminates the inclined tray surface that accumulates debris. Instead of relying on a continuous inclined surface for product movement, the system uses the pusher mechanism to periodically advance product, removing the surface that would otherwise become obstructed.
Solution Approach 2:
The pusher paddle acts as an intermediary between the spring force and the product. Rather than relying on gravity and surface friction alone, the pusher provides direct mechanical contact to move product forward, bypassing the debris-contaminated surface issue.
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 solution ensures continuous, obstruction-free product movement towards the front of the shelf, maintaining product accessibility and visibility without the need for tracks or guides, suitable for both gravity-fed and non-gravity-fed systems.
Implementation Method 1
a coiled spring that extends across the pusher floor and that is attachable to a tray at a forward position on the tray. The coiled spring is positioned behind the pusher paddle so as to urge the pusher paddle forward and along the tray
Implementation Method 2
The pusher mechanism of the present invention may be used with gravity-fed merchandise systems (i.e., inclined shelves or trays) and non-gravity-fed merchandise systems
Data Source
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AI summary
A product management display assembly (10, 80) for merchandising product on a shelf. The product management display assembly (10, 80) comprises a tray (12) which is configured to receive product (70) to be displayed, a pusher mechanism (14) mountable on the upper surface (16) of the tray (12) and comprising a pusher paddle (50) with a pusher floor (52) extending forwardly from the pusher paddle (50), and a flat coiled spring (30) attachable to the tray (12) and operatively located behind the pusher paddle (50) so as to urge the pusher paddle (50) forward and along the upper surface (16) of the tray (12). The coiled spring (30) detachably attaches the pusher mechanism (14) to the upper surface (16) of the tray (12).