Lock-type chain stitch sewing machine

Abstract

The lockstitcher is provided with shuttle hook, the shutter hook can revolve around the upright axial cord of the shuttle hook along the rotation direction of the needlework operation process and it composes the shutter body of the bobbin cover which is used to accommodate the supplying source of the shutter thread in the inner part. The knife blade can rotate around the pivot axis of oscillation which is parallel to the axial cord of the shuttle hook between the initial position and take-up position. In the operation process of the needlework, the first rotate-proof stop catch which cooperates with the opposite stop catch of the first bobbin cover avoids the bobbin cover rotating around the axial cord of the shutter hook in the rotation direction. In the opposite direction, the second rotate-proof stop catch which cooperates with the opposite stop catch of the second bobbin cover fixes the bobbin cover. The second rotate-proof stop catch is fixed on the wire-restoring blade. When the shuttle hook rotates along the opposite direction, the location guarantee arrangement in the chucking location fixes the wire-restoring blade on the initial position. At the initial position, the second rotate-proof stop catch cooperates with the opposite catch stop of the second bobbin cover. Therefore it forms the sewing machine which has little critical demand to the whole component room of the line access zone between the bobbin cover and the bearing plate.

Description

technical field

[0001] The present invention relates to a lockstitch sewing machine, in particular to a double thread type lockstitch sewing machine comprising: a shuttle which is rotatable around a vertical shuttle axis in the rotation direction of the sewing operation and which comprises a shuttle body , the shuttle body accommodates the bobbin cover for receiving the supply source of the shuttle thread; the take-up blade that can rotate around the pivot axis parallel to the axis of the shuttle between the initial position and the thread take-up position, the bobbin cover rotates along the sewing operation process The rotation around the axis of the shuttle is limited by the first anti-rotation stopper and the first spool cover opposite stopper, and its rotation in the opposite direction is stopped by the second anti-rotation stopper and the second bobbin cover. block limit. Background technique

[0002] Such a sewing machine is known from DE 101 17 560 C1. The cover bod...

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