Adjustable Height Jib for Hook-Lift Hoist

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Solution Overview

Problem

Hook-lift hoists are limited in accommodating containers of varying heights, as they are typically engineered to match a specific container size and height, restricting their versatility in handling different-sized equipment and containers.

Innovation Solution

The hook-lift hoist features a pivoting jib member with two hooks, allowing it to adjust between two working lengths by pivoting 180 degrees about a pivot axis closer to one hook than the other, enabling engagement with containers of different heights without manual or powered adjustments, using a keeper or latch to secure the jib in position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the hoist is engineered to match a specific container size and height, then the loading capacity is optimized for that container, but the versatility to handle different-sized containers is reduced

Engineering Contradiction:

Improveability to handle different container sizesVSAvoidstructural complexity of the hoist system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The jib member is made dynamically adjustable in length through a telescopic mechanism with nested sections that can extend and retract. This allows the hoist to adapt its geometry to match different container heights while maintaining structural integrity and loading capacity optimization for each configuration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The jib member is divided into multiple telescopic sections that can independently extend or retract. This segmentation allows for continuous adjustment of the jib length to accommodate various container sizes without requiring complete redesign of the hoist structure.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the hook height is preset for a specific container, then the engagement precision is maximized, but the ability to engage containers of different heights is limited

Engineering Contradiction:

Improveengagement capability with different container heightsVSAvoidpreset hook height accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The hook height is made dynamically adjustable through the telescopic jib mechanism. The hook can be positioned at multiple height levels corresponding to different container types, maintaining precise engagement capability while providing adaptability to various container heights through mechanical extension and retraction of the jib sections.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If a single truck chassis is used with multiple container types, then the operational versatility is improved, but the time required to adjust between different container configurations increases

Engineering Contradiction:

Improvemulti-purpose container handling capabilityVSAvoidconfiguration adjustment time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The telescopic jib provides rapid dynamic adjustment capability, allowing the operator to quickly extend or retract the jib sections to match different container heights without time-consuming manual reconfiguration. This maintains operational versatility across multiple container types while minimizing configuration change time.

Inventive Principle:

Principle #15Dynamics

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

This design allows a single hook-lift hoist to efficiently load and transport containers of multiple sizes and heights, enhancing versatility and operational flexibility without the need for manual or powered adjustments, thus addressing the limitations of existing systems.

Implementation Method 1

the jib member pivots on the hook-lift arm between an extended and shortened position to engage for loading containers or the like having loading bars that are at different heights

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS7726930B2Adjustable height jib for a hook-lift hoist

Publication Date: 2010.06.01 SWAPLOADER US

AI summary

An adjustable height jib is disclosed for an arm of a hook-lift hoist for loading of equipment, containers or the like onto a truck for transport. The jib has an elongate body with a hook located on each of its opposing end portions. The jib is mounted on the arm for pivotal movement between a first position for loading containers of a first height and a second position for loading containers of a second height. A lock secures the jib in either position. A feature of the adjustable height jib is that, upon release of the lock, it will pivot between a longer position as the hook-lift hoist is operated toward the loading position and a shorter position as the hook lift hoist is operated toward the transport position.