Collapsible Crate Base Projections for Stable Stacking

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Solution Overview

Problem

Collapsible crates cannot be stacked reliably on larger containers due to their larger footprint, which prevents interlocking with the pegs and platforms of the larger containers, resulting in instability during stacking.

Innovation Solution

The collapsible crate features a base with downwardly protruding projections or 'tabs' that interlock with the ribs on the platform of the larger container, providing a stable stacking mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If collapsible crates use a larger footprint design, then they provide more storage capacity, but they cannot be stacked reliably on larger containers due to inability to interlock with pegs and platforms

Engineering Contradiction:
Improvestorage capacityVSAvoidstacking reliability
Core Design Contradiction:
Volume of moving objectVSReliability

Solution Approach 1:

The base of the collapsible crate is segmented with multiple projections or tabs distributed across its surface. These segmented elements individually engage with corresponding recesses or features on the larger container's platform, distributing the stacking load and improving reliability despite the crate's larger overall footprint

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The projections or tabs on the crate base act as intermediary elements that mediate the connection between the collapsible crate and the larger container. These intermediate features enable interlocking without requiring direct contact between the crate's main body and the container's support structures

Inventive Principle:
Principle #24Intermediary (Mediator)

2Volume of moving object

If collapsible crates are designed with a larger footprint, then they can hold more items, but they destabilize when stacked on larger containers due to lack of interlocking mechanism

Engineering Contradiction:
Improvestorage capacityVSAvoidstacking stability
Core Design Contradiction:
Volume of moving objectVSStability of the object's composition

Solution Approach 1:

The base is divided into multiple engagement points through projections or tabs, creating multiple stable contact zones with the larger container. This segmentation distributes the crate's weight and prevents tipping, enhancing stacking stability despite the larger footprint

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention adds a vertical dimension to the stacking interface by extending projections downward from the base. This creates interlocking engagement in the vertical dimension, preventing lateral movement and improving stability while maintaining the crate's horizontal storage capacity

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS8056723B2Collapsible container
Publication Date: 2011.11.15 REHRIG PACIFIC CO INC
  • US8056723B2 patent drawing
  • US8056723B2 patent drawing
  • US8056723B2 patent drawing

AI summary

A container includes a plurality of walls extending upward from a base. At least one support is movable between a retracted position and a support position. The base includes projections downwardly from each corner of the base for interlocking with a larger container stacked thereunder.