Weighted Shelf Pusher Assembly for Light Package Advancement

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional shelving systems, particularly those with spring-loaded pusher members and gravity-actuated roller pins, face issues such as package damage, difficulty in restocking, high installation costs, and inefficiency in advancing lighter merchandise packages, which often result in merchandise falling backward during restocking.

Innovation Solution

A weighted pusher assembly with a solid plate or hollow weighted member, collapsible arms, and a fastener mechanism that uses gravity to advance merchandise packages along an inclined shelf, allowing for easy restocking and minimizing backward falls of lighter packages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a spring-loaded pusher member is used to advance items on the shelf, then items are automatically advanced when one is removed, but the force exerted on items makes it difficult to remove or insert items and can cause package damage

Engineering Contradiction:

Improveautomatic item advancementVSAvoiddifficulty to remove or insert items

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

Instead of using a spring-loaded pusher that exerts continuous force on items, the patent uses a gravity-actuated roller system where the shelf itself is inclined. The gravity force naturally pushes items forward when space is created, eliminating the need for active pushing mechanisms and reducing resistance to item removal and insertion.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the spring-loaded mechanical pusher system with a gravity-based system using an inclined shelf and rollers. This substitution eliminates complex mechanical components (springs, pushers) and uses the simpler, more reliable force of gravity combined with rolling friction to achieve automatic item advancement.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If a spring-loaded pusher member is used to advance items, then items are automatically advanced, but the force can result in package damage particularly when inserting packages

Engineering Contradiction:

Improveautomatic item advancementVSAvoidpackage damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The inclined shelf design and roller mechanism provide a controlled, gradual advancement of items rather than sudden forceful pushes. This cushioning effect prevents damage by distributing the advancing force over a longer distance and time period, especially protecting the front-most package during insertion.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Productivity

If a gravity actuated roller pin system is used, then items advance on the shelf, but the system requires numerous parts (18 to 24 parts) that must be assembled, increasing labor and cost

Engineering Contradiction:

Improveitem advancementVSAvoidnumber of parts to assemble

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges multiple separate components into integrated assemblies. The roller track is formed as a single piece with built-in support structures, eliminating the need for separate backing supports, individual roller housings, and multiple fasteners. This reduces the part count from 18-24 parts to a much smaller number of integrated components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The roller track assembly serves multiple functions simultaneously: it provides structural support for the shelf, guides item movement, and enables gravity-actuated advancement. This multi-functionality eliminates the need for separate components for each function, reducing overall system complexity and assembly requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If conventional gravity roller shelving systems with retainer strips are used, then rollers are secured to the base, but if one roller needs replacement, the retainer strip must be removed which frees all rollers and can cause others to accidentally dislodge

Engineering Contradiction:

Improveroller securingVSAvoiddifficulty to replace individual roller

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The patent segments the roller mounting system into individual, independently replaceable units. Each roller is mounted in its own discrete holder or channel on the roller track, allowing one roller to be removed and replaced without affecting the security or position of other rollers. This eliminates the need to remove a common retainer strip that secures all rollers simultaneously.

Inventive Principle:

Principle #1Segmentation

5Adaptability or versatility

If thinner, light-weight and/or small merchandise packages are used, then more variety can be displayed, but they tend to not advance forward correctly along the rollers because they have insufficient weight

Engineering Contradiction:

Improveproduct variety displayVSAvoidmerchandise advancement

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent modifies the physical parameters of the shelf system, specifically the incline angle and roller spacing, to optimize for lighter packages. The incline is adjusted to provide sufficient gravitational force component along the shelf surface, and roller spacing is optimized to ensure proper engagement and advancement of smaller, lighter items without requiring excessive weight.

Inventive Principle:

Principle #35Parameter changes

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 weighted pusher assembly effectively advances lighter merchandise packages without damaging them, facilitates easy restocking, and reduces installation costs by simplifying the design and operation, ensuring that merchandise remains upright during restocking.

Implementation Method 1

A weighted pusher assembly for advancing a merchandise package by gravity along an inclined shelf surface

Methodology Applied

Scientific EffectGravity: Gravitation

Implementation Method 2

a collapsible member collapsible between a first extended position and a second collapsed position

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS9375098B2Weighted pusher rolling shelving assembly

Publication Date: 2016.06.28 SUNGAL CORP

AI summary

Disclosed is a weighted pusher assembly for advancing merchandise packages by gravity along an inclined shelf surface. The weighted pusher assembly includes a first end comprised of a weighted member, a second end comprised of a fastener and, disposed between the first and second ends, a collapsible member that is collapsible between a first extended position and a second collapsed position. The weighted member is adapted to be disposed proximal to the merchandise package and a first edge of the shelf and the fastener is adapted to be disposed distal the merchandise package and fastened to a second edge of the shelf. The collapsible member is preferably adapted to collapse substantially completely in a direction substantially perpendicular to the inclined shelf surface. The weighted member may be a hollow structure that is filled with a material to give it mass, but can also be a solid structure.