[U LOWER
SHAFT
AND
ROTARY HOOK
MECHANISM
1. When
puiley
O turns inthe arrowdirection, its
rotating
motion
is
conveyed
to uppershaft O toturn
timing
beltwheel
upper
O'
2. The motion is conveyed to timing belt wheel lower 0 via timing belt
O.
3.
As
lower shaft O which is connected to timing belt wheel lower O rotates, spiral gear O is turned.
4. Rotary hook rotates via pinion gear O which is connected to rotary hook base
O-
(Opener)
1. Opener crank 0 moves in the
shape
of an arc via rotary hook 0 and
opener
link
©.
2. Opener 0 which is connected to opener crank 0 moves in the shape of an arc.
• The
LS2-B837
sewing
machine
does
not
contain
a left
side
rotary
hook. etc.
because
of
the
one
needle.
E FEED
MECHANISM
m.
When
pulley O turns in the arrow direction, its rotating motion is conveyed to upper shaft O to turn timing belt wheel
upper
O.
The motion is conveyed to timing belt wheel lower O via timing belt
O.
Eccentric wheel O which Is
connected
to lower shaft O rotates via timing belt wheel lower O
and
lower shaft
O.
Level feed arm 0 moves in the
shape
of an arc via eccentric wheel
O.
level feed connecting rod 0
and
level feed
connecting
link
0.
Feed bar 0 moves
back
and
forth via feed rock
shaft
0
Feed bar fork 0 moves up and down by vertical feed eccentric wheel 0 which is
connected
to lower shaft
©.
The
movement
of feed
dog
is fixed by
the
combination
of
movements
in item 5
and
item
6.
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