| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently secure the remaining length of a needle thread in a sewing needle after thread cutting and to surely perform thread cutting. SOLUTION: The needle plate 20 of a sewing machine is provided with a thread cutter 110 for cutting the needle thread, and a shuttle mechanism 103 provided under the thread cutter 110 for passing a bobbin thread through a loop of the needle thread. Besides, the thread cutter 110 is equipped with a moving scalpel 111 for forward movement of a reciprocating and turning action along with an approximately horizontal direction to sort the needle thread to be the upstream side of the shuttle mechanism 103 and for backward movement to carry a needle thread U1 which is on the downstream side of the shuttle mechanism 103, to a cutting position, and a thread hauling member 112 for locking the needle thread U1 selected by the moving scalpel 111 to be located on the upstream side. The needle plate 20 of the sewing machine is then equipped with a needle hole 23 where a sewing needle 15 is inserted and on its lower side surface, a thread guide groove 24 is provided approximately along with the same direction from a terminal portion of the needle hole 23 on the side of a reciprocating direction F of the moving scalpel 11. COPYRIGHT: (C)2004,JPO&NCIPI
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