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Thread cutting device for overedger

An overlock sewing machine and thread cutting technology, which is applied in the sewing machine to cut off the thread mechanism, sewing machine components, sewing equipment, etc., can solve the problems of thread cutting, thread damage, wear, etc., and achieve the effect of high efficiency and simple structure

Inactive Publication Date: 2014-05-07
ZHEJIANG SHANGGONG GEM SEWING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses the eccentric spindle to drive the tangent movable knife to swing and mesh with the tangent fixed knife to achieve the purpose of tangent. There will be wear between them, which will cause the bite force between the fixed knife and the movable knife to decrease, and cause the thread to be broken instead of cut when the thread is cut, causing damage to the thread and affecting product quality. In severe cases, cutting will occur. The situation of continuous thread will affect the stability of high-speed overlock sewing machine

Method used

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  • Thread cutting device for overedger
  • Thread cutting device for overedger
  • Thread cutting device for overedger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as Figure 1 to Figure 3 As shown, a thread cutting device of an overlock sewing machine, the overlock sewing machine includes a frame 111, a main shaft, a tooth frame 121, a driving mechanism, a fixed knife 211, a moving knife 311, a moving knife rest 411 and a fixed knife rest 511, and the main shaft is worn On the frame 111, the drive mechanism can drive the tooth frame 121 to do elliptical motion, such as figure 1 , figure 2 As shown, the tooth frame 121 is arranged on the frame 111, the fixed knife 211 and the moving knife 311 all have blades, the fixed knife 211 is fixed on the frame 111 by an L-shaped fixed knife rest 511, and one end of the fixed knife rest 511 is for installation. End one, the other end of the fixed knife rest 511 is the installation end two, the installation end one of the fixed knife rest 511 is fixed on the frame 111, the fixed knife 211 is fixed on the installation end two of the fixed knife rest 511, and the fixed knife 211 is provi...

Embodiment 2

[0032] The structure and principle of this embodiment are basically the same as that of Embodiment 1. The difference is that the connection structure includes connection hole 1 provided on the connection end of the movable tool holder 411, connection hole 2 provided on the bracket 121 and connection One end of the connecting pin acts on the first connecting hole, and the other end of the connecting pin acts on the second connecting hole. Connecting hole one is elongated, tooth frame 121 drives transmission pin 431 when moving, and connecting pin drives movable knife rest 411 to slide back and forth in connecting hole one when swinging, guarantees that movable knife rest 411 rotates smoothly along the hinge.

Embodiment 3

[0034] The structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference is that the driving mechanism includes a connection hole, a motor, a cam, a camshaft and a connecting rod provided on the tooth frame 121, and the motor is fixed on the frame 111 One end of the camshaft is fixedly connected with the output shaft of the motor, one end of the cam is fixed on the other end of the camshaft, one end of the connecting rod is fixed on the other end of the cam, and the other end of the connecting rod is fixed in the connecting hole of the tooth bracket 121.

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Abstract

The invention provides a thread cutting device for an overedger, belongs to the technical field of a sewing machine and solves the technical problems of condition that a thread is not cut off and the like of by a thread cutting device of an existing overedger, and the like. According to the thread cutting device for the overedger, the overedger comprises a rack; a tooth frame and a driving mechanism for driving the tooth frame to swing in an oval shape are arranged on the rack; the thread cutting device comprises a moving cutter rest, a fixed cutter with a cutting edge and a moving cutter with a cutting edge; the fixed cutter is fixed on the rack; the middle part of the moving cutter rest is a hinged part; one end of the moving cutter rest is a fixed end; the other end of the moving cutter rest is a connecting end; the hinged part of the moving cutter rest is hinged on the rack; the moving cutter is fixed at the fixed end of the moving cutter rest; the moving cutter and the fixed cutter are arranged in a staggered manner and can be abutted against each other in the thread cutting process; and a connecting structure capable of enabling the fixed end of the moving cutter rest to swing along with the tooth frame is arranged between the connecting end of the moving cutter rest and the tooth frame. The thread cutting device has the advantage that the moving cutter is always abutted against the fixed cutter so as to ensure the bite force between the moving cutter and the fixed cutter.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to an overlock sewing machine, in particular to a thread cutting device of an overlock sewing machine. Background technique [0002] In the prior art, the thread trimmers of high-speed overlock sewing machines are generally divided into two types: electric control thread trimmers and pneumatic control thread trimmers. Among them, the power source used by the electric control thread trimming device is the electromagnet to drive the moving knife. Due to the bite problem between the moving knife and the fixed knife, if the moving knife and the fixed knife bite too tightly, the electromagnet has insufficient resilience and the moving knife cannot return to its position. Moreover, the electromagnet needs related supporting devices, so the structure of this device is complicated, the manufacturing precision is high, and therefore the production cost is also relatively high. The pne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B65/00
Inventor 陈军省陈又洪
Owner ZHEJIANG SHANGGONG GEM SEWING TECH CO LTD