Sewing machine for hemming

Abstract

The invention provides a sewing machine for hemming. The sewing machine comprises a stitch length adjusting device, an operation platform, a ranging device and a mechanical arm and is characterized in that the operation platform is provided with a feed dog and a sewing needle, the ranging device comprises a first sensor in linkage with the stich length adjusting device, the first sensor is arranged on the conveying path of a to-be-sewn material and can sense the edge of the to-be-sewn material, the mechanical arm is provided with a dragging part, the dragging part can be driven by the mechanical arm to translate along the operation platform, the dragging part can telescope towards or away from the operation platform, and the dragging part can be coordinated with the operation platform to drag the to-be-sewn material. The sewing machine is capable of automatically adjusting stich length and changing the sewing direction of the to-be-sewn material, high in production efficiency and stable in product quality.

Description

technical field [0001] The present invention relates to a sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to pass through sewing needles to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. It usually includes a sewing machine body. The sewing machine body includes an operating table, a sewing needle and a stitch adjustment device. As shown in the Chinese invention (publication number: CN204455534U), the distance adjusting device includes a needle distance screw, a needle distance connecting rod and a needle distance seat. , to form an axial push on the needle distance seat, and drive the needle distance connecting rod to swing through the needle distance seat, so as to realize the adjustment of the needle distance. In the process of sewing, it is necessary to sew multiple edges of the sewing material, and After one edge of the sewing material is stit...

AI Technical Summary

Problems solved by technology

It usually includes a sewing machine body. The sewing machine body includes an operating table, a sewing needle and a stitch adjustment device. As shown in the Chinese invention (publication number: CN204455534U), the distance adjusting device includes a needle distance screw, a needle distance connecting rod and a needle distance seat. , to form an axial push on the needle distance seat, and drive the needle distance connecting rod to swing through the needle distance seat, so as to realize the adjustment of the needle distance. In the process of sewing, it is necessary to sew multiple edges of the sewing material, and After one edge of the sewing material is stitched, the sewing material needs to be rotated accordingly, and then continue to sew to the next corner position. During the process of sewing the edge of the sewing material, the operator adjusts the distance between the sewing needle drop points. The spacing, especially the landing point at the corner of the sewing material, directly affects the appearance of the finished product, and it needs to be adjusted according to the different sewing materials, especially in the sewing process of products such as complex stitches and high-end clothing. The difficulty of adjusting the stitch distance is further increased, which leads to complicated operation of the sewing machine and high technical requirements for the operators, and the products produced by manual operation are affected by the skills of the operators, and the quality of the products is unstable.

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