Development of Thumb Endurance Curves Applicable for Deadman Switches in Sandblasting Machines

Document Type

Conference Proceeding

Publication Date

1-1-2021

Abstract

Thumb operated deadman switches used in sandblasting machines are designed to prevent serious bodily injury from unintentional discharge of high velocity sand. The force required to hold down the switch is significant, causing fatigue and pain to set in very quickly in operator’s thumb. The objective of this study was to determine the thumb force capacity and muscle fatigue curves for thumb flexion, applicable for design of these devices. Maximum thumb pressing force (MTPF) and endurance times (ET) for holding down at force levels of 10, 20, 40, and 60% of MTPF were measured from 10 male and 10 female participants in a laboratory experiment. The best fit curves of ET as a function of %MTPF were modeled with R2 > 95%. These models should be used in matching the worker strength capacity to the thumb force requirements in deadman switch design to improve safety standards in sandblasting.

Identifier

85111096666 (Scopus)

ISBN

[9783030746100]

Publication Title

Lecture Notes in Networks and Systems

External Full Text Location

https://doi.org/10.1007/978-3-030-74611-7_26

e-ISSN

23673389

ISSN

23673370

First Page

190

Last Page

195

Volume

222 LNNS

Fund Ref

U.S. Department of Health and Human Services

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