Automatic shuttle replacement device and method and sewing machine

Abstract

The invention provides an automatic shuttle replacement device for replacing a first shuttle with the insufficient allowance of threads and a first shuttle case. The automatic shuttle replacement device comprises a main board, a shuttle case limiting shaft, a shuttle grabbing mechanism, a shuttle remaining thread removal mechanism, a shuttle winding and threading mechanism and a thread cutting mechanism, wherein the shuttle case limiting shaft is sleeved with a second shuttle wound by threads sufficiently and a second shuttle case; the shuttle grabbing mechanism comprises a hook claw base, a shuttle grabbing driving source and a shuttle grabbing hook claw, the shuttle grabbing hook claw is used for hooking a shuttle case plate on the first shuttle case or the second shuttle case; the shuttle remaining thread removal mechanism comprises a fixing shaft, a driving wheel unit and a driven wheel unit which are installed on the main board, and a thread clamping space; the shuttle and windingthreading mechanism comprises a winding shaft and a clamping base, a clamping interval and an interval inlet are formed in the clamping base; the cutting mechanism comprises a thread cutting edge arranged on the clamping base. The second shuttle wound by threads sufficiently and the second shuttle case can be replaced in a rotating shuttle, and automatic remaining thread removal, winding, threading and cutting can be performed on the replaced first shuttle and the second shuttle case, so that the automatic degree is quite high, and then the sewing efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of sewing machines, in particular to an automatic bobbin core changing device and method. [0002] The invention also relates to a sewing machine. Background technique [0003] The rotary hook of the sewing machine is equipped with a bobbin case and a bobbin. The bobbin is wound with sutures, and the amount of sutures wound on the bobbin is limited. Empty needles will destroy the fabric or a certain seam, which will cause the seam to stop halfway, and the part of the seam that has been sewn must be removed. Therefore, in actual operation, the turner will stop sewing after sewing for a period of time according to experience, then take out the bobbin in the rotary hook, and pull out all the remaining sutures on the bobbin, and then rewind the bobbin full of sutures. Putting it into the rotary hook and then continuing to sew, it takes a long time, the operation is cumbersome, and the efficiency is low, which eventually...

AI Technical Summary

Problems solved by technology

But, the bobbin and the bobbin case quantity that are placed on the turntable are limited, still need the workman regularly to take off the bobbin and bobbin case that change on the turntable, then remove the remaining suture thread on the bobbin, bobbin after bobbin is wound. put into the bobbin case and thread, and place the bobbin and the bobbin case on the turntable, so the above-mentioned automatic bobbin changing device does not greatly reduce the labor intensity of workers and improve sewing efficiency

[0005] Further, in the automatic bobbin changing device, the manipulator is mainly used to replace the manpower, and to simulate manual shuttle changing, winding, threading and secant, so the structure of the manipulator is very complicated and the efficiency is low.

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