| 摘要 |
<p>Provided is a device for threading the lower looper of a sewing machine, the device being capable of safe and reliable threading of the lower looper by reliably preventing the rotation of the main shaft when the lower looper is being threaded. Below a needle plate (100), a looper thread (20) is threaded through a looper hole (16) of a lower looper (15). Provided are: a first moving part (11) wherein a threading part (17), which has a hook (18) that can be inserted into the looper hole (16) of the lower looper (15), is fixed on one end; a second moving part (13) connected so as to be movable in the direction opposite to the first moving part (11) and to which an operator part (14) is connected on the same side as the hook (18); and a lock lever (30) having a protrusion (32) below that engages with a groove (42) in a grooved cam (41) fitted on the main shaft (40) and a protrusion (31) above that contacts the operator part (14). When the protrusion (32) of the lock lever (30) engages with the groove (42), the operator part (14) and the protrusion (31) of the lock lever (30) separate and do not restrict the movement of the second moving part (13).</p> |
