Four edge overlock machine

[0009] The following describes the present invention in detail in conjunction with the accompanying drawings. The four-sided lock machine includes a material storage device 1, a side-cutting and side-sewing device 2, a cross-cutting and transverse sewing device 3, and a transmission device 4. The auxiliary materials quilted by the quilting machine enter the lock In the material storage device 1 of the quadrilateral machine, this device is used to connect two machines and store redundant auxiliary materials due to different working efficiencies. When the storage is full or empty, the sensor signal will be triggered to control the quadrilateral machine or quilting machine. Stop and wait, the auxiliary material enters the edge cutting and sewing device 2 for sewing edge creasing, and the sewing machine head performs sewing. There is a cutting knife behind the sewing machine head, which will carry out crimping and edge trimming according to the required margin, and one side of the knif