Side cutter lockstitch sewing machine with cutter clutch mechanism

Abstract

The invention discloses a side cutter lockstitch sewing machine with a cutter clutch mechanism, which comprises a machine head, and a panel is connected with the machine head; a knife drop wrench and a knife lift wrench are arranged on the panel; Pull the lever, the lever drives the clutch pin to move laterally, disengages the clutch pin from the hole of the slider, and makes the cutter clutch mechanism enter the separated state. At this time, the cutter cannot work; the falling knife plate assembly is driven downward by the falling knife wrench. Press, the falling knife plate assembly drives the knife bar seat to move downward; when the knife bar seat moves to touch the crank, the crank pushes the lever to rotate through the lever spring, and the lever drives the clutch pin to move in reverse, so that the clutch pin enters the slider In the hole, the cutter clutch mechanism enters the connected state, and the cutter can work at this time. The present invention replaces the cooperation between the cylinder and the groove through the cooperation between the cylinder section of the clutch pin and the slider hole of the slider and the cooperation between the slider plane and the slider groove, avoiding line contact and delaying wear.

Description

technical field [0001] The invention relates to a sewing machine, in particular to a side cutter lockstitch sewing machine with a cutter clutch mechanism. Background technique [0002] The feature of the side cutter lockstitch sewing machine is that the selvedge is trimmed neatly by the cutter while sewing, so it has been widely used in the garment industry. In the process of producing clothes, sometimes it is necessary to trim the edge, and sometimes it is not necessary to trim the edge, so the side cutter lockstitch sewing machine must have a clutch mechanism. [0003] The way of dropping the knife of the existing side cutter lockstitch sewing machine is to manually press the wrench on the upper end of the knife bar. When the cylinder enters the chute of the knife bar seat, the force can be transmitted to the knife bar. The tool bar of this structure must be very long, and the upper end is always exposed above the machine head, and the hand must be raised very high during...

AI Technical Summary

Problems solved by technology

[0004] The clutch mechanism of the existing side cutter lockstitch sewing machine is that the cylinder directly cooperates with the chute. Since the cylinder and the chute are in line contact, the wear is relatively fast; after the knife is lifted, the end of the cylinder and the knife holder are under the action of the spring. Since contact creates friction, it also wears

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