~
DOUBLE CHAIN STITCH LOOPER MECHANISM
1) Double chain stitch looper back and
forth
movement mechanism
• In case that crank shaft 0 may rotate to the direction indicated with arrow, with longitudinal eccentric cam
8,
longitudinal feed driving rod • moves up and down.
• Longitudinal feed lever slide borck • with longitudinal feed lever e
is
fitted into the
top
end
of
longitudinal feed
driving rod
• and gets back and forth movement making longitudinal feed lever shaft •
as
a fulcrum.
• Longitudinal feed lever slide block • connected between thrust collar
(;)
upon longitudinal feed shaft
fj
and set
collar
• ' it carrys to double chain stitch looper m
with
the intermediate action
of
longitudinal feed shaft • and
double chain stitch looper holder
(0
.
2) Double chain stitch oscillating mechanism
• Chain stitch driving lever
~
is
conveyed the oscillating motion
by
under looper connecting lever
41
with the
intermediate action
of
under looper connecting lever pin
f)
, chain stitch link
41
and chain stitch driving lever pin
••
• Its oscillation motion
is
conveyed to longitudinal feed shaft
fj,
double chain stitch looper holder C) and double
chain stitch looper
m .
~
KNIVES MECHANISM
1) Upper knife mechanism
· In case
that
crank shaft 0 may rotate to the direction indicated with arrow, with needle bar and upper knife eccentric
cam
8,
upper knife driving rod • moves up and down.
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