Rotating Downdraft Table for Ergonomic Dust Extraction

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Solution Overview

Problem

Existing machining tables with fixed tool holders require workers to assume ergonomically unfavorable positions and often necessitate re-clamping of workpieces to access all processing sides, while extraction systems like hoods require two-handed operation, limiting flexibility and efficiency.

Innovation Solution

A suction table with a rotatable workpiece holder and integrated suction device allows for 360° rotation, enabling ergonomic positioning without manual adjustment, allowing both hands to remain free for processing, and includes features like height adjustability and articulated side walls for optimal dust collection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the tool holder is fixed at the edge of the table, then the structure is simple, but the capture of fumes and dust is poor and working positions are ergonomically unfavorable

Engineering Contradiction:

Improvestructural simplicityVSAvoidfume and dust capture efficiency

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the conventional arrangement by placing the tool holder in the center of the table rather than at the edge. This central positioning allows the extraction device to surround the workpiece holder, creating a more effective containment zone for fumes and dust while improving ergonomic working positions.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The extraction device is arranged around the workpiece holder in a nested configuration, with the extraction device forming a surrounding structure that contains the workpiece holder within its extraction zone, maximizing capture efficiency.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of manufacture

If the extraction device is stationary, then the structure is simple, but the operator cannot assume optimal working positions and must manually reposition the table

Engineering Contradiction:

Improvestructural simplicityVSAvoidergonomic working position flexibility

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The extraction device is designed to be rotatable around the stationary workpiece holder, transforming the system from static to dynamic. This allows the operator to rotate the extraction device to assume optimal working positions while the workpiece remains centrally clamped.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The operator can automatically move the table along with them by turning their hips around the workpiece, and the extraction device rotates synchronously to maintain its position relative to the workpiece, providing self-adjusting ergonomic support.

Inventive Principle:

Principle #25Self-service

3Ease of manufacture

If the workpiece holder is at the table edge, then the setup is simple, but access to all sides of the workpiece requires frequent re-clamping

Engineering Contradiction:

Improvesetup simplicityVSAvoidworkpiece access efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent inverts the conventional edge placement by positioning the workpiece holder in the center of the table. This central location provides equal access to all sides of the workpiece, eliminating the need for frequent re-clamping while maintaining simple setup procedures.

Inventive Principle:

Principle #13The other way round (Inversion)

4Object-affected harmful factors

If the extraction device surrounds the workpiece holder completely, then dust collection is optimal, but the worker cannot stand close to the workpiece

Engineering Contradiction:

Improvedust collection efficiencyVSAvoidworker access to workpiece

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The extraction device incorporates hinged side walls that can be folded down, transforming the enclosure from completely rigid to dynamically adjustable. This allows the side walls to be opened or folded to provide worker access while maintaining extraction capability when needed.

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

The solution enhances ergonomic working conditions, improves dust and smoke capture, and allows for flexible and efficient processing of workpieces without the need for frequent re-clamping or manual table repositioning, particularly beneficial with hand-held machines.

Implementation Method 1

an extraction device is arranged below and/or next to the workpiece holder, by means of which particles and/or gases can be carried away downwards in an exhaust air stream

Methodology Applied

Scientific EffectSuction airflow: Suction

Data Source

PatentEP3579985B1Downdraft table having a workpiece holder for a workpiece to be held

Publication Date: 2022.12.21 ESTA APPBAU

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AI summary

The invention relates to a downdraft table (1) having a workpiece holder (2) for a workpiece to be held, wherein the workpiece holder (2) is configured in a stationary manner, wherein a suction-extraction device (3) is arranged beneath and/or next to the workpiece holder (2), said suction-extraction device (3) being used to discharge particles and/or gases downward in a waste air flow, wherein the suction-extraction device (3) is arranged around the workpiece holder (2) with respect to the latter and is configured to be rotatable about the workpiece holder (2).