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Feed Of The Arm Machine
By:APAR SINGH (03)NAMIT KUMAR (07)
SANJIT PANDEY (16)
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Identification/Description
Components Identification
Existing Layout
Problems associated with existing layout
Physical Psychological
Physiological
Effect of human-machine and environment w.r.t to
each other Suggestions
Conclusion
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The selected work space works on production offelled seams.
This type of seam is commonly seen as the inseamin denims.
The Commonly used machine for this type of seamis Feed of the arm machine.
A single operator is required for the process.
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Pick up the first piece
Place it through the folder under the pressurefoot.
Pick the second piece
Place it through the folder under the pressurefoot.
Hold both the pieces with hand applyingpressure tangentially to let the fabric pieces
pass through the folder. Stitch
Dispose
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Assembly tasks have many differentcomponents that
Must be considered in an ergonomicassessment including:
Supply and removal of garments,
Sewing table,
Chair,
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Floor surface,
Foot pedals,
Lighting,
Hand tools and
Work organization.
We will look at ergonomic problems andsolutions for
Each of these components.
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Existing Outline Plan
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Table Dimensions length*width*height = 25.5*20.5*29.5
Chair Dimensions length*width*height = 16*12*19
Gap between two consecutive machines = 21 All Dimensions are in inches
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Basic Considerations - Do the employee have sufficient strenght to
perform the task?
Do the employee report significant musclefatigue performing the work?
Do the employee become physicallyexhausted performing the work?
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Are there any work-related musculoskeletaldisorders?
Are there psychomotor and cognitivedemands that may cause accidents?
Do the workstation layout cause limits onmotion, excessive motion or postural fatigue?
Are there environmental conditions, such asheat, cold, vibration, noise or inadequateillumination, that may reduce performance?
Checklist for elements of ERGONOMICS.
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Condition Concern
POSTURES
Prolonged sitting (with poor back support) Yes
Prolonged crouching Yes
Trunk bending or twisting (front/back/side) Yes
Neck bending or twisting (front/back/side) Yes
Reaching in front, side and behind Yes
Forearm rotation Yes
Feet bent up/down left/right Yes
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Condition Concern
REPETITION
High-speed process lines/ production drivenwork
Yes
Similar motions every few seconds Yes
Observed signs of fatigue Yes
WORKSTATION DESIGN
Work surface too high or low No
Location of material promotes reaching yes
Table/bench lack adequate toe/ leg space No
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Condition Concern
Table/equipment places sharp edges on limbs,torso
No
Chair lacks adequate lumbar support Yes
Chair lacks adequate/adjustable seat height Yes
Lack of adequate footrest, antifatigue support
mat
Yes
FORCE
Awkward dynamic (rapid) application of force Yes
Long-duration exertions (static work) Yes
Wide grasping or pinching grips Yes
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Condition Concern
ENVIRONMENTAL
Room temparature/ equipment/ objects toohot/cold
No
Lighting too bright/dim No
Noisy area/ Not isolated from noise Yes
Vibrations in work area Yes
OTHER
Inappropriate work techniques Yes
PPE equipment needed and not used No
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Condition Concern
Tool size or design inappropriate No
Tools require high force or create torue/vibration No
Tools cause non-neutral wrist/elbow/ shoulderpositions
Yes
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Physical Reach (up/down/side/front)
Force (grip/ atmospheric condition)
Twisting
Height of the workstation Chair movement
Area of workspace
Orientation of display and control w.r.toperator
Ingress/ Outgress
Auxiliary Equipment and Tools
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Psychological Stress
Loss of concentration Headache
Physiological Back Pain
Shoulder Pain
Neck Pain
Wrist Pain
Eye problems Foot pain
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There are no boxes for material handling. Tables are in poor location
No attachments
Non-Ergonomic Chairs
Foot Pedals are improper
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Shoulders Elbow
Neck
Back Wrist
Fingers
Knees
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Myalgiamuscle pain Chronic myofascial pain syndromechronic pain in
the muscles
Tendinitisinflammation of a tendon (e.g.,
shoulder tendinitis, tennis elbow) Tenosynovitisinflammation of a tendon and its
sheath (e.g., in the wrists,hands, or fingers)
Carpal tunnel syndromeswelling and entrapment
of the median nerve in the wrist
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Thoracic outlet syndromesqueezing of the nervesand blood vessels between the neck and shoulder.
Hand-arm vibration syndromedamage to blood
vessels and nerves in the hands and arms. Degenerated, bulging, or ruptured (herniated) disks
in the neck or back
Sciaticabulging or ruptured disks in the lower
back causing lower back pain that also extends tothe legs and feet
Degenerative or osteoarthritiswear and tear onthe spine, joints, vertebrae, and disks, associated
with long-term physical loads on spinal structures
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The dimensions of the sewing table thatshould be considered are the:
Height, size, shape, (adjustible)
Tilt (tilted 10 to 25 towards the operator)
And leg room.
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The best chairs have these features: A stable 5-point base of support;
Firm cushioning on the backrest and seatpan;
The seat can be adjusted in height and tiltquickly and easily;
The seat does not have a hump on the front
edge;
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The backrest can be adjusted in height andfrom front to back;
The seat pan is large enough to support theoperator but small enough so that he or shecan use the backrest;
The backrest does not interfere with the
movement of the shoulder blades or arms; The chair can swivel when operators have to
turn sideways frequently; and
The chair has castors only where appropriate,and not where it makes operators slide awayfrom their workstation.
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Use proper tools Keep repetitive motions to a minimum
Avoid awkward postures
Get proper rest
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