above the support arms 36a each of the adjusting cams 37 has a groove with which each of the support pins 38 is operatively engaged as may be seen in fig8 and 10 each of the waiting levers 27a 32a and 34a is pivotally moved through rotation of the first waiting cam 31a the second waiting cam 33a and the third waiting cam 35a all fitted on the driving shaft 30a respectively pivotal movement of each of the waiting levers 27a 32a and 34a permits the first engaging piece 5ba connected to the needle bar the second engaging piece 11a connected to the nipple bar and the third engaging piece 20a connected to the pressing bar to move vertically when the fulcra s of swing of the waiting levers 27a 32a and 34a are vertically adjusted through rotation of the adjusting cams 37 the levels of vertical movements of the forward ends of the waiting levers 27a 32a and 34a or the contacting positions with the needle bar nipple bar and pressing bar are vertically adjusted as the operation of the second embodiment is almost the same as that of the first embodiment the explanation will be omitted referring to fig1 to 14 shown therein is a modified mechanism for raising the needle bar numeral 51 designates a support bracket disposed at the forward end of the machine head h a vertically movable needle bar 52 is rotatably carried by the support bracket 51 a needle 53 is secured to the lowermost end of the needle bar 52 and an interlocking piece 54 is attached to the top.