Automatic envelope sewing machine

Abstract

The present invention relates to the technical field of sewing machines, and specifically relates to an automatic envelope sewing machine. An upper roller feeding structure is used for assisting a pull-over device to realize automatic sewing. According to the technical scheme of the invention, the automatic envelope sewing machine comprises a handpiece and a bottom plate, wherein a mounting plate is arranged on one side of the handpiece, two wire clamping seats are connected to the mounting plate, the wire clamping seats are connected with a motor mounting seat through steel pipes, a motor is connected to the motor mounting seat, a main synchronous belt pulley is connected to the motor, the main synchronous belt pulley is connected with a lower synchronous belt pulley component through a synchronous belt, the lower synchronous belt pulley component is arranged on a main connecting shaft, a first feeding component, a second feeding component and a third feeding component are connected to the main connecting shaft, the first feeding component and the third feeding component are located on a right side of a motor mounting plate, the second feeding component is located on a left side of the motor mounting plate, an auxiliary feeding component is arranged on the left side of a needle plate of the bottom plate, and a pull-over detection component is arranged on the right side of the needle plate of the bottom plate.

Description

technical field [0001] The invention relates to the technical field of sewing machines, in particular to an automatic cover sewing machine. Background technique [0002] Notebooks, certificates, certificates and other covers are referred to as covers. In recent years, in order to pursue beautiful appearance, merchants have used hard or soft leather materials for the outer packaging of some products, such as hotel menus, high-end notebooks, certificates, certificates, etc. Demand Ascension has opened up a new development path for the sewing industry. The cover is generally sewn with four-sided single-thread sewing, which requires beautiful stitches, neat distances from the sidelines, uniform corners, and a few stitches overlap at the beginning and end of sewing to avoid threading. The process is single. Ordinary lockstitch sewing machines can satisfy straight-line sewing, but the corners are not easy to control. The current sewing machine needs to manually operate the four co...

AI Technical Summary

Problems solved by technology

[0002] Notebooks, certificates, certificates and other covers are referred to as covers. In recent years, in order to pursue beautiful appearance, merchants have used hard or soft leather materials for the outer packaging of some products, such as hotel menus, high-end notebooks, certificates, certificates, etc. Demand Ascension has opened up a new development path for the sewing industry. Covers are generally sewn with four-sided single-thread sewing, which requires beautiful stitches, neat distances from the sidelines, uniform corners, and a few stitches overlap at the beginning and end of sewing to avoid threading. The process is single. Ordinary lockstitch sewing machines can satisfy straight-line sewing, but the corners are not easy to control. The current sewing machine needs to manually operate the four corners, and often there is one more stitch or one less turn. The stitch distance from the sideline is not neat, the corners are not uniform, and the labor efficiency is low, and the cost is high. Ordinary lockstitch sewing machines use the feed dog to feed the material, which is easy to scratch the cover and has a high scrap rate.

Images