Pallet Assembly Double-Walled Column Design

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Solution Overview

Problem

Plastic pallets suffer significant damage due to impacts from forklift tines, particularly affecting the columns and outer periphery.

Innovation Solution

A pallet assembly design featuring upper and lower column portions with a double-walled reinforcement structure, where the upper column portions have slots for receiving the lower column portions, providing enhanced structural integrity through the integration of optional lateral and longitudinal reinforcement members.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If single-walled columns are used in plastic pallets, then manufacturing is simpler and cost is lower, but the columns and outer periphery suffer significant damage from forklift tine impacts

Engineering Contradiction:
Improvedamage resistanceVSAvoidcolumn structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a nested column structure where an inner column is received within an outer column, creating a double-walled configuration. The inner column is positioned within the outer column's interior space, with the outer column's walls providing additional protective layers around the inner column. This nesting arrangement provides enhanced damage resistance while maintaining a compact overall structure.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent creates a composite structural system by combining inner and outer column portions made of plastic material. The composite nature of this nested arrangement provides superior impact resistance compared to single-walled columns, as the multiple walls work together to absorb and distribute impact forces from forklift tines.

Inventive Principle:
Principle #40Composite materials

2Reliability

If double-walled columns are implemented throughout entire height, then impact resistance is significantly improved, but manufacturing complexity and cost increase

Engineering Contradiction:
Improveimpact resistanceVSAvoidmanufacturing process
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent segments the column structure into distinct upper and lower portions, each with specific wall configurations. The upper portion features double-walled construction for maximum impact protection, while the lower portion may have different configurations. This segmentation allows optimized manufacturing processes for each section while achieving overall enhanced impact resistance where needed.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies double-walled construction specifically to regions experiencing the highest impact forces, such as the upper portion of columns and outer periphery areas. This localized application of enhanced structural quality provides maximum impact resistance at critical locations while avoiding the unnecessary manufacturing complexity and cost of double-walled construction throughout the entire column height.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS8770115B2Pallet assembly
Publication Date: 2014.07.08 REHRIG PACIFIC CO INC
  • US8770115B2 patent drawing
  • US8770115B2 patent drawing
  • US8770115B2 patent drawing

AI summary

A pallet assembly includes an upper portion and a lower portion. The upper portion includes an upper deck for supporting items thereon and upper column portions extending downward from the upper deck. The upper column portions include a first upper column portion having a slot defined by a pair of slot walls. The lower portion includes a plurality of lower column portions including a first lower column portion. The first lower column portion includes a peripheral wall and a support structure having a pair of walls extending inward from the peripheral wall. One of the first upper column portion and the first lower column portion is received within the other, with the support structure received in the slot between the slot walls.