Empty ring sewing up device for cup seaming machine

Abstract

A miss loop sewing-in device for overedger is arranged with two inside-and-outside falling needle slots and two inside-and-outside needle plate claws which are arrayed in the direction which is approximately orthogonal to the sewing advancing direction, a miss loop guiding component is fixed to the lower surface side of the needle plate of the overedger which is arranged with a miss loop holder at the side of the operator that is in the sewing advancing direction of the needle plate, the miss loop guiding component is provided with a guiding surface which abuts on the miss loop that does rotation when the hand drawing part that draws the cloth after the sewing moves, guides the miss loop sliding-contactly from the end back position of the falling needle part of the inner side falling needle slot to the outside position of the sewing advancing direction frontage of the front end part of the outside needle board claw, thereby the easy structure can be made without the using of the movable component and the price is low, and the device causes the pulling effect of the miss loop of the needle plate claw and the moving-in guiding effect of the miss loop in the moving-in guiding to the outside falling needle slot reliable irrespectively with the operation skill of the operator, and always does the scheduled backstitch reliably and excellently.

Description

technical field [0001] The invention relates to an empty ring sewing device of an overlock sewing machine. In detail, it relates to an empty loop sewing device of an overlock sewing machine: after the sewing is finished, the operator pulls the cloth to the front of the sewing direction, and manually pulls it back to the side in front of the operator, Then, pull out the empty loop that is connected to the fabric at the end of sewing when the edge of the fabric is hemmed to the side in front of the operator of the needle plate containing the needle drop, and keep it set in front of the operator. On one side of the empty loop holding unit, the empty loop is cut off from the fabric at the same time. In this state, the empty loop held on the empty loop holding unit is automatically sewn into the stitches of the fabric to be sewn next (hereinafter referred to as back stitching), to prevent the stitches at the beginning of the seam from being unraveled, especially related to a devic...

AI Technical Summary

Problems solved by technology

In addition, since the second guide cam surface for guiding the empty loop where the thread is gathered by the first guide cam surface to move into the outer needle drop groove is formed on the back surface of the fixed protrusion (the surface on the front side in the direction of sewing progress). , Therefore, in order not to forcibly and smoothly transfer the empty ring from the first guide cam surface to the second guide cam surface, the end of the fixed protrusion cannot be protruded too much outward.

[0008] Therefore, the effect of pulling out the empty ring from the claw of the needle plate and the effect of guiding the empty ring into the outer needle drop groove will be affected by the operator's ability to move the fabric after sewing. There is a high possibility that the empty ring is pulled out from the claw of the needle plate smoothly or the empty ring cannot be smoothly guided into the outer needle drop groove, which may hinder the specified return stitching.

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