Thread winding and threading mechanism and method for cop latches and sewing machine

Abstract

The invention provides a thread winding and threading mechanism for cop latches. The mechanism comprises a main plate with the fixed position, a winding shaft which is driven by a winding driving source to rotate and used for fixing the first cop latch, a thread clamping base which is driven by a thread clamping driving source to rotate and a shuttle grabbing hook claw which is driven by a shuttlegrabbing driving source to rotate and used for grabbing a first shuttle shell. The shuttle grabbing hook claw and the shuttle grabbing driving source are arranged on a hook claw base, the hook claw base can move in the axial direction of the first cop latch and is provided with a thread clamping gap and a gap inlet which is formed in one end of the thread clamping gap, the winding shaft and / or the thread clamping base can move in the axial direction of the first cop latch, and the winding shaft, the thread clamping base and the hook claw base can be supported by the main plate. According to the thread winding and threading mechanism for the cop latches, winding is achieved through cooperation of the winding shaft, the thread clamping base and the hook claw base, then threading is achievedaccording to a simplified manual threading track, winding and threading can be accurately conducted accordingly, and the mechanism does not need a mechanical arm and is simple in structure and easy to control.

Description

technical field [0001] The invention relates to the field of sewing machines, in particular to a bobbin winding and threading mechanism 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

Therefore, the success rate of bobbin winding and threading in this way is low, and it is also necessary to ensure that the pre-wound sutures are overlapped, otherwise, after the official winding starts, the previously pre-wound sutures will loosen and cannot be wound. Moreover, the use of manipulators to grab, wind and thread threads not only has a more complex structure, but also requires higher requirements for the control of the manipulator's winding process.

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