Trackless Shelf Pusher Mechanism to Prevent Tipping and Binding
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Solution Overview
Problem
Existing merchandising systems face issues with debris and sticky substances obstructing the movement of products on inclined shelves and pusher systems, leading to improper product placement and potential tipping or binding of pusher mechanisms.
Innovation Solution
A trackless pusher mechanism that uses a coiled spring and pusher paddle to move products along a surface without tracks, preventing tipping and allowing for adjustable dividers and adaptors to accommodate various product sizes and shapes, ensuring effective product placement on both inclined and horizontal shelves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a track-mounted pusher system is used to push product toward the front of the shelf, then product placement is improved, but the track becomes obstructed with dirt or sticky materials that hinder proper operation
Solution Approach 1:
The invention removes the track component from the pusher system entirely. The pusher mechanism operates without being constrained to a track, eliminating the surface that accumulates dirt and sticky materials. This extraction of the problematic track element resolves the obstruction issue while maintaining the pusher's ability to move product forward.
Solution Approach 2:
The pusher mechanism is designed as a self-contained unit with the spring and paddle integrated, operating independently rather than being guided by an external track. This segmentation separates the pusher function from the track structure, allowing the pusher to move freely along the shelf surface without track-related obstructions.
2Productivity
If a coiled spring pusher mechanism is used, then product is pushed forward effectively, but the pusher paddle may tip or bend backwards causing binding
Solution Approach 1:
The flat coiled spring is positioned and tensioned in advance to exert continuous forward pressure on the pusher paddle. This preliminary action ensures the paddle maintains proper orientation and prevents backward tipping or bending before it can occur during operation, thereby maintaining reliability while preserving productivity.
Solution Approach 2:
The invention specifies using a flat coiled spring rather than a conventional round spring, changing the physical parameters of the spring to provide more stable and uniform force distribution. This parameter change prevents the paddle from tipping or bending backwards by distributing the pushing force more evenly, resolving the reliability issue while maintaining effective product movement.
3Ease of operation
If inclined trays with low friction surfaces are used, then product slides easily toward the front, but debris and sticky substances obstruct sliding and cause products to tip over
Solution Approach 1:
The invention removes the dependent relationship between the pusher and the shelf surface conditions. Instead of relying on the shelf surface to enable sliding (which becomes problematic when obstructed), the pusher mechanism independently pushes product forward using spring force, making it unaffected by debris or sticky substances on the surface.
4Reliability
If a trackless pusher system is implemented, then obstruction issues are eliminated, but the system complexity increases
Solution Approach 1:
The trackless pusher design uses simple, easily replaceable components including a basic flat coiled spring and a straightforward paddle structure. These simple components are easier to manufacture and replace than complex track systems, reducing overall system complexity while maintaining reliability through ease of maintenance and replacement.
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 trackless pusher system ensures consistent and efficient product placement at the front of shelves, reducing obstruction and binding issues, while being adaptable to different product sizes and shapes, and can be retrofitted into existing shelving systems.
Implementation Method 1
A flat coiled spring or other biasing element can be operatively connected behind the pusher paddle
Implementation Method 2
a pusher mechanism with a pusher paddle and a floor that extends forward of the pusher paddle
Implementation Method 3
inclined trays or floors that through gravity will cause the product to move toward the front of the shelf
Data Source
AI summary
A product management display system for merchandising product on a shelf includes using a trackless pusher mechanism that travels along a surface on which product is placed. The pusher mechanism of an exemplary embodiment includes a pusher surface and a pusher floor that extends forward of the pusher surface. A flat coiled spring or other biasing element may be operatively connected behind the pusher mechanism and extend across a divider and to the front of the shelf. In use, the product to be merchandised may be placed on the pusher floor. With this configuration, the pusher surface is prevented from tipping or bending backwards during operation. In an alternative aspect, the end of the coiled spring may be mounted to a retainer, to a divider or, alternatively, directly to the shelf.