|T|
Needle
zigzag
mechanim
DilQvi
1. Whenthe
pulley
O rotates inthe direction ofthe arrow, the rotating movement istransmitted to the reduction
gear O
fixed
on the upper shaft
Q-
2. Thereduction gear©
meshes
with
thesub shaftgear
reduces
therotation oftheuppershaft© by
half,
and
transmits this motion to the sub shaft
©.
3. The
needle
zigzag
cam © is
fixed
to the auxiliaryshaft
©,
and the triangular portion of the
needle
zigzag
cam
fits in the needle zigzag forked link
©.
4. The upper end of the
needle
zigzag
forked
link
© is
fitted
on the
needle
zigzag
link
©,
and an oscillating
movement is transmitted to the needle zigzag lever R © linked with the lower end of the needle zigzag forked
link
©.
5. The needlezigzaglever F © isfixed on the needlezigzaglever R © and causes the needle barframe slideblock
o fitted on the end of the needle zigzag lever F © to oscillate.
6. The needle bar support slide block © fits in the groove of the needle bar support © and causes it to oscillate
back
and
forth.
-2-
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