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A master thesis from Aalborg University

VIBRASHIFTER: Hand-Arm Vibration Damping Equipment

[VIBRASHIFTER: Dæmpningsudstyr til Hånd-Arm Vibrationer]

Author(s)

Term

4. term

Education

Publication year

2023

Submitted on

2023-05-31

Pages

137 pages

Abstract

Dette speciale i industrielt design omhandler udviklingen af Vibrashifter, et alsidigt, eftermonterbart, vibrationsdæmpende håndtag der bevarer kontrol af en række vibrerende, håndstyrede maskiner i blandt andet byggeri- og anlægsbranchen. Projektets udgangspunkt var identifikationen af Hånd-arm Vibrations Syndrom (HAVS) som et sundheds- og samfundsmæssigt problem, der kan opstå ved blandt andet brugen af vibrerende maskiner, afhængig af styrke og udsættelsestid. Dette kan give operatøren arbejdsskader, der belaster dem, deres arbejdsgiver og samfundet på grund af erstatningskrav, bøder, behandlinger og tidlig pension. HAVS omfatter mange lidelser, men muskelskeletsygdommen karpaltunnelsyndrom og Raynauds syndrom er den hyppigste forekomst. Disse kan medføre gener som fingersmerter, kramper, spasme, tab af førlighed, motorisk kontrol og styrke. Karpaltunnelsyndrom kan kirurgisk behandles, men kræver ofte 3 måneders efterfølgende sygemelding, og arbejdsformen bør ændres for at undgå følgegener. Raynauds syndrom er uhelbredelig og meget udbredt. Det viser sig som anfald udløst af kuldepåvirkning, hvilket jævnligt er del af udendørs arbejde. Sygdommene udbredes da byggelederne ofte stilles i et svært dilemma, hvor de skal vælge mellem at overholde lovgivningen ved at beskytte medarbejdere mod udvikling af HAVS eller at afslutte projektet inden for den altafgørende tidsramme. Konkurrenceevnen er afhængig af tidsramme og pris. Dette betyder, at brugen af især ældre, men funktionelle maskiner nemt overskrider grænseværdierne for vibrations udsættelse. Blandt andet af økonomiske årsager udskiftes de ældre maskiner dog sjældent til nyere modeller for at mindske vibrationer, men benyttes indtil de ikke længere er funktions dygtige. Her er Vibrashifter et alternativ, der kan hjælpe byggelederne med at beskytte deres medarbejdere uden at gå på kompromis med effektivitet.

This industrial design thesis revolves around the design process behind Vibrashifter, a versatile, vibration-damping handle that maintains control of a variety of vibrating, hand-operated machines used industries such as construction. The identification of Hand-arm Vibration Syndrome (HAVS) as a health and societal problem that can arise from, among other things, the use of vibrating machines, depending on magnitude and exposure time, was the starting point of the project. This can result in workplace injuries that burden the operator, their employer, and society as a result of compensation claims, fines, treatments, and early retirement. HAVS encompasses a wide range of disorders. The most common are the musculoskeletal diseases Carpal Tunnel Syndrome and Raynaud's syndrome. These can cause finger pain, cramps, spasms, and a loss of agility, motor control, and strength. Carpal Tunnel Syndrome can be treated surgically, but it often necessitates three months of sick leave afterward, and the way of working should be altered to avoid side effects. Raynaud's Syndrome is both incurable and widespread. It manifests as seizures triggered by cold exposure, which is a regular part of outdoor work. The diseases spread because construction managers are frequently faced with a difficult choice between complying with legislation by protecting employees from HAVS and completing the project within the critical time frame. Since competitiveness is determined by time and price, old machines are still used though they easily exceed the vibration exposure limit values. Vibrashifter is an alternative that can assist construction managers in protecting their employees without sacrificing efficiency.

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