Trackless Pusher Mechanism for Merchandise Display
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Solution Overview
Problem
Existing merchandising systems face issues with product placement on shelves due to obstruction by debris or sticky substances, which hinder the movement of products towards the front, and pusher mechanisms often malfunction due to dirt or sticky materials, as well as product size and weight-related issues.
Innovation Solution
A trackless pusher mechanism that uses a pusher paddle and a coiled spring to move products forward, with a design that prevents the paddle from tipping and includes notched or cut-out portions for spring alignment, allowing it to work on both inclined and non-inclined surfaces, and can be retrofitted into existing shelving systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a track-based pusher system is used, then directional control and reliability are improved, but device complexity and susceptibility to obstruction increase
Solution Approach 1:
The patent removes the track component from the pusher system, extracting the source of obstruction problems. The pusher mechanism operates without a track, eliminating the issue of debris accumulation in tracks while maintaining directional control through the angled surface geometry and pusher paddle design.
Solution Approach 2:
The pusher system is segmented into independent functional components: the pusher paddle for applying force, the spring for storing and releasing energy, and the angled surface for providing directional guidance. This segmentation allows each component to perform its specific function without requiring a complex integrated track system.
2Productivity
If an inclined tray system is used, then product movement to the front is improved, but obstruction by debris and sticky substances worsens
Solution Approach 1:
The patent eliminates the inclined tray surface that accumulates debris by using a vertical or near-vertical shelf face with a pusher mechanism. This extraction removes the problematic surface where sticky substances and debris accumulate, while maintaining product movement capability through the pusher system.
Solution Approach 2:
The pusher paddle acts as an intermediary between the spring force and the product, transferring force directly to the product without requiring a continuous inclined surface. This intermediary mechanism avoids contact with debris-contaminated surfaces that would otherwise hinder product movement.
3Force
If a pusher paddle is used, then product pushing capability is improved, but bending and binding issues worsen
Solution Approach 1:
The pusher paddle is designed with dynamic characteristics, allowing it to flex slightly during operation to accommodate variations in product positioning and size. This dynamic design prevents binding and maintains stability by adapting to different product configurations rather than requiring rigid precision.
Solution Approach 2:
The pusher system parameters such as spring force, paddle angle, and paddle dimensions can be adjusted based on product characteristics. This parameter flexibility allows the system to maintain optimal pushing force while preventing paddle bending or binding for different product sizes and weights.
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
Ensures efficient and consistent product movement towards the front of the shelf, reducing obstructions and mechanical failures, and accommodates various product sizes and weights, maintaining product visibility and accessibility.
Implementation Method 1
include a pusher paddle and a coiled spring to urge the product forward
Implementation Method 2
utilizing a pull strip and alignment shoes for low-friction sliding
Implementation Method 3
works with gravity-fed merchandise systems (i.e., inclined shelves or trays)
Data Source
Figure 1~2
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Figure 5~6
AI summary
A merchandise display system having a pusher structure (14500, 14700) slidably-coupled to a track (14516). The pusher structure (14500) comprises a lock arm (14506) configured to selectively engage with a ratchet rack (14600) to allow for selective unidirectional motion of the pusher structure (14500) along the track (14516). Selective disengagement of the lock arm (14506) from the ratchet rack (14600) is facilitated by actuation of a pull strip (14512). Alternatively, the pusher structure (14700) comprises a lock arm (14506) configured to selectively engage with a rack gear (14706) to prevent motion of the pusher structure (14700) in both longitudinal directions (14526, 14528) of the track (14516). Selective disengagement of the lock arm (14506) from the rack gear (14706) is facilitated by actuation of a pull strip (14512).