Stackable Storage Containers With Automatic Self-Locking Alignment

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Solution Overview

Problem

Existing storage solutions for tools and equipment lack an effective, quick, and easy way to securely attach and detach multiple storage containers, leading to disorganization and loss of tools, especially in environments like construction projects and repair shops.

Innovation Solution

A system of stackable storage boxes with automatic locking mechanisms, including tri-state locks and self-aligning features, that allow containers to lock and unlock easily, ensuring secure stacking and easy detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple storage containers are stacked without an effective attachment mechanism, then the storage system is simple and easy to assemble, but the containers become disorganized and tools may be lost

Engineering Contradiction:
Improvesecurity of container attachmentVSAvoidcomplexity of attachment mechanism
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The stacking system employs self-aligning features where protrusions on one container automatically align with recesses on another container through gravity and geometry, enabling the containers to lock together without manual intervention or complex mechanisms

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The attachment mechanism uses intermediate geometric features (protrusions and recesses) that mediate the connection between containers, providing a simple yet reliable interface that requires no complex fastening operations

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If storage containers use a secure locking mechanism, then the containers are securely attached and tools are protected from loss, but the process of attaching and detaching containers becomes time-consuming

Engineering Contradiction:
Improvesecurity of container attachmentVSAvoidtime to attach and detach containers
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The locking action is performed automatically by the weight of the upper container itself, which causes the protrusions to engage with the recesses without requiring preliminary manual locking operations

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The containers self-lock through their own weight and the geometric design of the attachment features, eliminating the need for separate locking operations or tools

Inventive Principle:
Principle #25Self-service

3Ease of operation

If storage containers are designed for easy stacking, then the containers can be quickly assembled and disassembled, but the locking mechanism may not provide sufficient security

Engineering Contradiction:
Improveease of stacking and unstackingVSAvoidsecurity of container attachment
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The attachment features use asymmetric protrusions and recesses that provide directional guidance and automatic alignment, ensuring that containers can only be stacked in the correct orientation, which simplifies operation while maintaining security

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The system uses the weight of the containers themselves to drive the locking action, with the upper container automatically engaging the locking features when placed on the lower container, providing both ease of operation and secure attachment

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP4364899B1Stackable storage containers with a maintenance cart
Publication Date: 2025.07.09 PANOSIAN MICHAEL H
  • EP4364899B1 patent drawingFigure 1A
  • EP4364899B1 patent drawingFigure 1B
  • EP4364899B1 patent drawingFigure 1C

AI summary

A stack of multiple storage boxes with sliding lock indicator levers. Stack 100 includes a wheeled base container or box 101, other intermediate boxes 102, a top or upper box 103, each box having a handle 108 and a lock status indicator 104, corner slots 105, and a lid 106. The base box 101 may include wheels 107.