| 摘要 |
PROBLEM TO BE SOLVED: To provide a needle-threading device of a sewing machine which can easily insert a thread through a thread hole of a looper and dispenses with the removal of the looper when the thread is blocked. SOLUTION: A needle-threading device 100 of a sewing machine is provided with a thread guiding means 1 which has an end as a thread insertion slot 1a, the other end as a thread outlet 1b and an inner thread pathway through which the thread can be inserted, a thread guide moving means 2 which moves the thread guiding means so that it can move between a threading position where the thread outlet coincides with a thread hole 202a of a looper 202 and an evacuation position apart from the threading position, an air spraying means 3 which is arranged opposite to the thread insertion slot when the looper is in a predetermined position and sprays air to the thread insertion slot and an air supplying means 5 which supplies air to the air spraying means. COPYRIGHT: (C)2006,JPO&NCIPI
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