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Titolo:
TOOL DESIGN, USER CHARACTERISTICS AND PERFORMANCE - A CASE-STUDY ON PLATE-SHEARS
Autore:
KILBOM A; MAKARAINEN M; SPERLING L; KADEFORS R; LIEDBERG L;
Indirizzi:
NATL INST OCCUPAT HLTH,DIV APPL WORK PHYSIOL S-17184 SOLNA SWEDEN ERGOMA AB GOTHENBURG SWEDEN LINDHOLMEN DEV AB GOTHENBURG SWEDEN
Titolo Testata:
Applied Ergonomics
fascicolo: 3, volume: 24, anno: 1993,
pagine: 221 - 230
SICI:
0003-6870(1993)24:3<221:TDUCAP>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Keywords:
FATIGUE; HAND SIZE; HANDGRIP STRENGTH; PLATE-SHEARS; PRODUCTIVITY; TOOL DESIGN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social Sciences Citation Index
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
A. Kilbom et al., "TOOL DESIGN, USER CHARACTERISTICS AND PERFORMANCE - A CASE-STUDY ON PLATE-SHEARS", Applied Ergonomics, 24(3), 1993, pp. 221-230

Abstract

Performance, grip forces and fatigue were studied in six male and sixfemale subjects while cutting with plate-shears. Three types of plate-shears were used, one standard and two modified, either with a springgrip, or with a spring grip in combination with a reduced grip span. In addition, three types of plate - easy, moderately difficult and difficult to cut - were used. Male subjects used around 40% of their maximal grip force and female subjects around 60% with the moderately difficult plate; the male subjects produced more than twice as long a cutting distance as the females. Neither EMG analysis (frequency shifts) nor subjective exertion or reduction of handgrip MVC indicated a more pronounced fatigue in women than in men, probably because the female subjects used about a 50% lower cutting rate than the men. Productivity (in cm cut per min) was strongly related to measures of hand size and to the relative grip force used. Thus in a multiple regression analysis using metacarpal hand circumference and relative grip force as independant variables, R2 was 0.77. The two types of modified plate-shears were preferred by all and gave a roughly 30% higher productivity in the male subjects but did not improve productivity in the females. However, with a spring grip and reduced grip span, the female subjects reduced the relative grip force used from around 65 to 50%. The total work(force-time integral) per cm cut was not influenced by type of plate-shear.

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Documento generato il 05/07/20 alle ore 23:04:13