Sectional Door Impact Bar Assembly for Forklift Protection

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Solution Overview

Problem

Sectional overhead doors in high-traffic industrial settings are prone to damage from accidental impacts by forklifts and cargo, leading to operational downtime due to lack of effective protection.

Innovation Solution

An impact bar assembly is fixedly mounted to the door panel, comprising a bumper bar pivotally mounted to an impact guide bracket with a compression spring, which absorbs initial impacts and directs forces away from the door panel, using panel spacers to transfer loads to the wall, minimizing stress on the door.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If no protection is installed on the door panel, then the device complexity is low, but the door is vulnerable to damage from forklift impacts

Engineering Contradiction:
Improvedoor damage resistanceVSAvoidprotection system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

An impact bar assembly is introduced as an intermediary protective element between the forklift and the door panel. The assembly includes a bar member with bumper elements that intercept impact forces before they reach the door, while allowing the door to remain relatively simple in structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The impact bar assembly is pre-installed on the door panel to provide beforehand protection against potential forklift impacts. The bumper elements are positioned to absorb and redirect impact forces before they can damage the door panel, preventing damage in advance.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

2Reliability

If a rigid protection structure is installed on the door panel, then the protection effectiveness is high, but the stress on the door panel increases during impact

Engineering Contradiction:
Improveimpact protection effectivenessVSAvoidstress on door panel
Core Design Contradiction:
ReliabilityVSStress or pressure

Solution Approach 1:

The impact bar assembly incorporates movable and adjustable elements that allow it to dynamically respond to impact forces. The bar member can move independently of the door panel, and the bumper elements can be adjusted in position and orientation to optimize impact absorption while minimizing stress transmission to the door.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The protective system allows for changes in physical parameters such as the position of the bar member, the orientation of bumper elements, and the spacing between components. These parameter adjustments enable the system to adapt to different impact scenarios while controlling stress on the door panel.

Inventive Principle:
Principle #35Parameter changes

3Device complexity

If the door panel is directly protected without an intermediate structure, then the protection is simple, but the impact forces are transmitted directly to the door causing damage

Engineering Contradiction:
Improveprotection structure simplicityVSAvoidimpact force transmission
Core Design Contradiction:
Device complexityVSObject-affected harmful factors

Solution Approach 1:

The impact bar assembly serves as an intermediary structure that intercepts impact forces before they reach the door panel. The bar member with its bumper elements creates a protective barrier that absorbs and redirects impact forces, preventing direct transmission to the door while maintaining relatively simple overall structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

The solution effectively prevents damage to sectional overhead doors, reducing downtime by absorbing and redirecting impact forces, thus extending the door's operational life and reducing the need for repairs or replacements.

Implementation Method 1

an impact guide bracket with a compression spring that absorbs initial impacts and directs forces away from the door panel

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS9644419B2Sectional door protector
Publication Date: 2017.05.09 CORNELLCOOKSON LLC
  • US9644419B2 patent drawing
  • US9644419B2 patent drawing
  • US9644419B2 patent drawing

AI summary

A sectional overhead door protector is described. In a preferred embodiment an impact bar assembly is fixedly mounted to a door panel to protect the sectional overhead door from inadvertent impact. When the impact bar assembly is struck a force vector is generated inward towards a wall and biased to an outside of the door panel preventing stress on the door.