Abrégé

Provided is a double-needle lockstitch sewing machine that can easily sew a fabric rolled into a tubular shape by two rows of lockstitch. The double-needle lockstitch sewing machine includes: a pair of needles (9) that reciprocates in an up-down direction; a pair of loop catchers (40) that is arranged respectively corresponding to the pair of needles (9) and that catch loops of needle threads formed by the needles (9) by rotating about hook shafts (41) extending in the up-down direction; a lower shaft (20) that is disposed in front of the needles (9) and the loop catchers (40) in the cloth feeding direction and extends in the left-right direction and that rotates in conjunction with a main shaft (10) that drives the needles (9); and connecting shafts (30) that extend in the cloth feeding direction and are connected to the lower shaft (20) and the hook shafts (41) in a power transmittable manner to rotate. The loop catchers (40) are rotationally driven in conjunction with an up and down movement of the needles (9) as a rotational power of the lower shaft (20) is transmitted to the hook shafts (41) via the connecting shafts (30). Thus, it is possible to easily sew a tubular article with two rows of lockstitch seams.

Classes IPC  ?

• D05B 1/14 - Coutures à point de chaînette et point de navette alternées ou combinées
• D05B 57/36 - Entraînement pour boucleurs dans les machines à point noué
• D05B 73/06 - Carters inférieurs pour machines à coudre du type à bras libre
• D05B 93/00 - PointsCoutures piquées pour la couture main
• D05B 57/14 - Navettes avec crochets rotatifs