Anti-crease arrangement for flat seamer

Abstract

This invention provides the anti-crease mounting of even seamer, and it relates to the subunit construction of seamers including needle plate, presser feet and feeding teeth. Wherein the front end of feeding teeth pivotally connected with teeth stand looped on feeding axis, the rear end pivotally connected with feed lifting block, which clipped in joint yoke of Y-type feed lifting crank pivotallyconnected with feed lifting axis, an aperture opened at the rear end of feed aperture slot, feed lifting axis clipped with pendulum rod,the other end of the rod connected with push rod which can passthrough the aperture and contact with presser feet floor. When feeding teeth is feeding, and the push rod, driven by drive axle, passes through the aperture and clamp the shell fabric with presser feet floor. The lower shell fabric stretches with the effect of feeding teeth and push rod and keeps synchronizing with upper shell fabric. This method avoids the puckering phenomena in tailoring thin cloth, soft cloth, and satin shell fabric such as silk cloth, so can reduce the work difficulty of operators, decrease the amount of work of topical finishing, with high productive efficiency and low cost of production.

Description

Technical field: [0001] The invention relates to a component structure of a sewing machine, in particular to an anti-wrinkle device of a lockstitch sewing machine. Background technique: [0002] The structure of the sewing part of the existing lockstitch sewing machine is shown in Figure 1. For the convenience of expression, the front, rear, left and right directions are set with reference to the operator. The upper end of the needle plate 2 is a presser foot 4 that can be moved up and down, and the feed tooth 3 below the tooth hole groove 2.2 of the needle plate 2 is installed in the middle of the tooth frame seat 11. Teeth slider 8 is clamped in the fork groove of the fork-shaped tooth-lifting crank 7 that is fixedly connected with tooth-lifting shaft 12; Hole is fixedly connected with feeding shaft 9. [0003] The feeding shaft 9 drives the tooth frame seat 10 and drives the feeding tooth 3 to move back and forth through the tooth frame 11, and the tooth lifting shaft 1...

AI Technical Summary

Problems solved by technology

However, when sewing thin materials, soft fabrics, silk and other slippery fabrics, the lower fabric moves forward under the drive of the feed dog 3, and the friction of the upper and lower fabrics is relatively small and easy to slide relative to each other, so it is difficult for the lower fabric to drive the upper fabric. Synchronous forward movement, resulting in less feeding of the upper layer and more feeding of the lower layer, resulting in curling, dislocation of the upper and lower layers of fabrics, and wrinkles, and some are even wavy

The above situation not only increases the work difficulty of the sewing operators, but also increases the post-sewing finishing and ironing work, resulting in a high rate of defective products, increased production costs, and reduced work efficiency.

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