Bulk Transfer Conveyor Unloading for Mixed Container Loads

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Solution Overview

Problem

Unloading storage containers with varying item attributes and arrangements poses challenges for mechanization due to the difficulty in consistently identifying and handling items with diverse shapes, weights, and arrangements, leading to time-consuming and physically demanding manual processes.

Innovation Solution

A system comprising a movable chassis with a conveyor and bulk transfer assembly that displaces items without individual handling, using a feeder and collector to transport items en masse onto a conveyor, facilitated by a camera for depth and height adjustments to engage with the item surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual unloading methods are used, then flexibility in handling diverse items is maintained, but labor intensity and time consumption increase significantly

Engineering Contradiction:

Improveflexibility in handling diverse itemsVSAvoidunloading time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent replaces manual mechanical handling with an automated bulk transfer system. A bulk transfer assembly with a feeder mechanism automatically moves items from the container onto a conveyor belt, eliminating the need for manual sorting and handling while maintaining the ability to accommodate diverse item types through automated detection and adjustment systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system performs self-adjustment through automated depth and height modifications. The movable chassis and adjustable bulk transfer assembly automatically position themselves to engage with items of varying sizes and arrangements, allowing the system to adapt to different container loads without human intervention for each adjustment.

Inventive Principle:

Principle #25Self-service

2Manufacturing precision

If individual item handling is used, then precision in item placement is achieved, but device complexity and labor requirements increase

Engineering Contradiction:

Improveitem placement precisionVSAvoidhandling system complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent merges multiple handling operations into a single bulk transfer process. Instead of individually picking, moving, and placing items, the system uses a bulk transfer assembly that moves groups of items together onto the conveyor, reducing the number of separate operations while maintaining placement precision through controlled bulk movement.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bulk transfer assembly serves multiple functions: it detects item depth and height, adjusts the movable chassis position, modifies the bulk transfer assembly height, and executes the transfer operation. This multi-functional design reduces overall system complexity by consolidating what would otherwise require separate specialized devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If automated bulk transfer is implemented, then productivity and staffing reduction are achieved, but adaptability to varying item arrangements must be maintained

Engineering Contradiction:

Improveunloading speedVSAvoidadaptability to varying item arrangements

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The system employs dynamic adjustment mechanisms including a movable chassis that can reposition itself to different depths within the container and a bulk transfer assembly with adjustable height. These dynamic capabilities allow the automated system to adapt to varying item arrangements while maintaining high productivity through continuous operation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses camera-based detection to monitor item depth and height, providing feedback to the control system. This feedback enables automatic adjustment of the movable chassis and bulk transfer assembly positions, ensuring the system adapts to varying item arrangements without reducing productivity.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12606390B2System and method for bulk transfer-based container unloading

Publication Date: 2026.04.21 ZEBRA TECHNOLOGIES CORP

AI summary

A system for unloading items from a container includes: a movable chassis configured for deployment into an open end of the container, to a selectable depth within the container; a conveyor supported by the movable chassis, the conveyor configured to extend from an input end positioned within the container according to the selectable depth to a output end external to the container; and a bulk transfer assembly supported by the movable chassis at the selectable depth and an adjustable height, the bulk transfer assembly including: (i) a feeder configured to engage with the items and displace a portion of the items towards the conveyor, and (ii) a collector configured to receive and direct the displaced items to the input end of the conveyor for transport to the output end of the conveyor.