the hand has not been thoroughly considered from an ergonomics standpoint
(Kumar, 2004). Due to the hands complex anatomical structure, and intense usage
(Muralidhar, Bishu, & Hallbeck, 1999) ergonomic interventions are vital (Kumar,
2001). The hand is th
furthest away from the participant), turn the disks over, therefore showing the red
side of the disks, and place the disks into the holes of the bottom board (the board
closest to the participant). Participants began on the right, picking up the bottom
arranged in the form of cells embedded in a Chaku-Chaku system. The control
group consists of 64 workers with an average age of 38,5 years. The workplaces are
arranged like a typical assembly line, with an average cycle time of 85 se
A1 (N=64) A2 (N=18) A3 (N=23)
FIGURE 3: Frequency distribution for the work ability index.
Evidently, the workers of the handbrake lever assembly line that reached the
highest mean work ability index have the least missing data and are the sole group
Mital, A., Kuo, T. & Faard, H.F. (1994). A quantitative evaluation of gloves used
with nonpowered hand tools in routine maintenance tasks. Ergonomics, 37(2):
Muralidhar, A., Bishu, R.R. & Hallbeck, M.S. (1999). The development and
evaluation of an
around general information and physical disorders associated with nine anatomical
regions (neck, shoulder, elbow, hands/wrist, upper back, low back, hips/thighs,
knees, feet/ankles) (Kuorinka et al., 1987).
In the sample population A
the laptop screen.
Participants were requested to maintain a seated posture; ensuring backs were
against the back rest. The chair was positioned such that the participant was within
optimal reaching distance. The handle, which the participants grasped, wa
Belt (fig 2). The action forces have been explained in absolute value (daN) and in
relative one (%MVC).
In the laboratory, the forces were measured with a strain gauge SML-100 MFG
(302422) of a capacity about 50 daN. The forces exercised during the activi
C. (Ed.). pp. 385-396.
Deming, W.E. (1986), Out of the Crisis. Massachusetts Institute of Technology,
Dul, J., and Neumann, W.P. (2009), Ergonomics contributions to company
strategies. Applied Ergonomics, 40(4), pp. 745-752.
Health and Safety E
Internationale dErgonomie Karpacz
Arabi H., Vandewalle H., Kapitaniak B., Monod H., (2000) Evaluation of
wheelchair users in the field and in the laboratory: Feasibility of progressive
tests and critical velocity, Int.J. Ind.Ergonomics, 24, 483-491
Total work ext. rotation
barehanded 0:000117 0:000117
best fit nitrile n.s.
Total work int. rotation
barehanded n.s. n.s:
best fit nitrile n.s.
Average power ext.
barehanded 0:000117 0:000117
best fit nitrile n.s.
Average power int.
Winter, G., Schaub, K., and Landau, K. (2006), Stress screening procedure for the
automotive industry: Development and application of screening procedures in
assembly and quality control. Occupational Ergonomics, 6(2), pp. 107-120.
the leading competitors like Toyota. Therefore, Toyota Production Systems (TPS)
has been copied and adapted in many different ways. The method of
implementation of TPS activities varies in the corporations. Due to the
demographical change, a new discussio
Baudin, M. (2007), Working with machines The nuts and bolts of lean operation
with Jikoda. Productivity Press.
BIBB/BAuA: Erwerbsttigenbefragung 2005/2006. Ausgewhlte Ergebnisse.,
Online: www.arbeitsschutz.nrw.de [March. 2010].
Colombini D. and Occhipinti
Monods curve, which indicates the relationship between duration of exertion and the
percentage of maximum force exerted, as a function of fatigue. The red lines
indicate the 40% MVC recommended for participants to exert for 60 seconds.
SPEED AND ACCURACY
cases, for action forces. Aspects of repetition and exposure times are rarely
considered. Another method used to realize better conceptual ergonomics are
checklists that vaguely help the engineer to identify potential deficits in the design.
questionnaire. In: Costa, G., Goedhard, J.A.W. and Ilmarinen, J. (Eds.).
International Congress Series 1280. Amsterdam: Elsevier.
Occhipinti E. (1998), OCRA: a concise index for the assessment of exposure to
repetitive movements of the upper limbs. Ergono
For the description and evaluation of the risk factors associated with work-related
musculoskeletal disorders of the upper limbs (WMSDs), we used the Occupational
Repetitive Actions method (OCRA), (Occhipinti, 1998). The OCRA-Me
directly above the fixed axis, therefore isolating the required wrist movement for
the test. The participant was instructed to grasp the knob attachment and produce
maximum torque, maintaining a reasonably stationary forearm. This was achieved
An observational technique was used to evaluate working postures made by the
line-filler of the A2 assembly line. The working postures were analyzed by means
of direct observation of the activity. The observation was carried out in two
Although the dissemination of risk assessments may be easier to promote with a
one-for-all-tool, complex work situations in modern production systems require a
set of different tools for appropriate risk assessments. Here, the harmonization
between the to
The hand is the most complex of all of the anatomical structures in the human body.
It has been found that hand injuries are among the most frequent injuries that occur
to the body, predominantly occurring during industrial activities. It has therefore
insertion. The high insertion forces during pinch-grasp, particularly
due to the small friction coefficient in friction fit coupling, can lead to
musculoskeletal disorders and repetitive strain injuries. This study investigates, in
two different experimen
In smaller companies, physical risk factors are usually considered only in the
context of the compulsory risk assessment. Here, physical stress and contributing
work system deficits appear, if considered at all, in short checklists or at best in the
aging from 18 to 55, having no medical limitations due to health. For these
conditions, the standard recommends the acceptable maximal isometric force of the
push of 10.9 daN. Because the gesture implies an evident movement, the standard
recommends a coef
EVALUATION OF THE HARDNESS OF THE
ACTION ON THE TOOL ACCORDING TO NF EN
We applied NF EN 1005 standard: Safety of machinery - Human physical
performance, Part 3: Recommended force limits for machinery operation, Part 4:
(1993) tested various glove types and found that, relative to bare-handed
performance, the gloves which were tested limited the speed at which the work
could be accomplished. This was found to be true for the neoprene glove. Results in
Table 2 agree with
PoM, ReM, AdM, FoM are multipliers for the risk factors connected to the
postures, to the repetitive acts, to the force and the additional factors.
RcM is the multiplier for the risk factor "lack of recovery".
DuM is the multiplier for the total duration
Young J., Armstrong T., Ashton-Miller J., (2009) Active and Passive Forces in
Hand/Work-Object Coupling, XVIII IEA Congress, Pkin
Effect of Grasp-/ContactCharacteristics of Snap
Fasteners on Time
very important risk of MSD.
Keywords: physical workload, EMG, vibrating tools, forces measurement
We realized the observations of professional activity and the measures of working
strengths on the workplaces of foundry during the actions of d
percentage of the registered maximal activity. Taking into account that the used
equipment (Biometrics Datalog) does not allow to record the raw signal of the
EMG, but only the already integrated and averaged signal (avg RMS), this method
of calculation t
then sifted with the software CAPTIV (version 4.3.2.) allowing to synchronize all
the measured parameters with the video and to obtain a quantitative treatment of the
results. A part of the calculation of the muscular activity and the forces was realized
3, almost 4 times as high as the acceptable risk. The results of the measures of
bioelectric activity of muscles engaged during the work with the tool also confirm
an excessive effort (between 25 and 50 % of maximal efforts for the actions over 15
condition or the best fitting nitrile glove. The same was found for target deviation.
During both internal and external rotation in the torque test, the barehanded
condition generated significantly different (p<0.05) peak torque than the best fitting