Thread breaking device of automatic hosiery sewing machine

Abstract

The utility model discloses a thread breaking device of an automatic hosiery sewing machine, which comprises a base, a cutting part and a driving part are arranged on the base, the driving part drives the cutting part to move so as to be close to or close to a raw material sewing thread to be cut, the cutting part comprises a bearing plate and a fusing plate, and a heating wire is arranged on the fusing plate; the driving part comprises a first reciprocating part and a second reciprocating part, the first reciprocating part drives the bearing plate and the fusing plate to move forwards or backwards together, and the second reciprocating part drives the heating wire to move forwards or backwards relative to the fusing plate. According to the utility model, an original shearing mode is replaced by a heating fusing mode, so that the workload of maintenance is reduced; even if the heating wire breaks down, the heating wire is convenient to replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of knitting machinery, in particular to an automatic sock sewing machine after knitting socks, in particular to a thread breaking device of the automatic sock sewing machine. Background Art

[0002] After the socks are knitted, another stitch is needed to sew the toe of the socks, and the stitch is cut after the stitching is completed. For example, Chinese patent ZL200980120878.6 discloses an automatic sock sewing machine, which includes a scissor-shaped cutting piece, which cuts the stitch after the stitching is completed. This is also the mainstream technical solution on the market.

[0003] However, the stitches used to sew the toes of socks are usually quite tough, and after long-term use of scissors, they will inevitably wear out, and the blades need to be disassembled and re-sharpened, which will bring a relatively large workload. Summary of the invention

[0004] The purpose of the utility model is to overcome the above defects and provide a thread cutting device for an automatic sock sewing machine which is more convenient to use.

[0005] The utility model adopts such a technical scheme: the thread cutting device of the automatic hosiery machine comprises a base, on which a cutting piece and a driving piece are arranged, the driving piece drives the cutting piece to move to approach or the thread of the raw material to be cut, and is characterized in that: the cutting piece comprises a supporting plate and a fuse plate, and a heating wire is arranged on the fuse plate; the driving piece comprises a first reciprocating piece and a second reciprocating piece, the first reciprocating piece drives the supporting plate and the fuse plate to move forward or backward together, and the second reciprocating piece drives the heating wire to move forward or backward relative to the fuse plate.

[0006] Furthermore, an insulation tube is fixed on the fuse plate, a heating wire guide is arranged inside the insulation tube, and the heating wire extends out of the front end of the heating wire guide; the second reciprocating member drives the heating wire guide to move relative to the insulation tube, so that the heating wire extends out of the insulation tube or retracts into the insulation tube.

[0007] The base has a through long groove inside, through which the supporting plate and the fuse plate pass and move; the middle of the long groove has upward and downward depressions, and the two depressions are offset front and back; the middle of the fuse plate has upward and downward arc-shaped protrusions, which match the depressions.

[0008] The first reciprocating member includes a first cylinder and a first spring, and the second reciprocating member includes a second cylinder and a second spring; the two cylinders push the corresponding components forward, and the two springs are responsible for resetting backward.

[0009] The heating wire is an electric heating wire, and the current on and off of the heating wire is controlled by a circuit.

[0010] The working process of the utility model is as follows: when the suture needs to be cut, the first cylinder drives the supporting plate and the fuse plate to advance to the working position, and at the same time the second cylinder drives the heating wire to extend out of the insulation tube, the supporting plate supports the suture so that it does not float disorderly, and the heating wire contacts the suture to melt it; then the second spring and the first spring drive the heating wire, the supporting plate and the fuse plate to reset, waiting to move forward again for cutting.

[0011] In the present invention, the direction close to the suture is called the front, and the opposite direction is called the back; the front and back directions are horizontal, and the vertical directions are called up and down.

[0012] The utility model replaces the original shearing method with a heating and fusing method, thereby reducing the maintenance workload; even if the heating wire fails, it is very convenient to replace it. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is an exploded schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] In this embodiment, the sock sewing machine has a large needle 2, a small needle 3, and a steel needle 1. The large needle and the small needle move together to form a stitch on the steel needle. 4 is an imaginary stitch shape. The actual stitch shape is more complicated and has a certain droop, so it needs to be supported.

[0016] This embodiment is arranged near the stitch formed above to facilitate cutting of the stitch. This embodiment includes a base 5, which is formed by correspondingly merging a front plate 51 and a rear plate 52, and a through groove 53 is milled on the front plate 51; it also includes a support plate 6 and a fuse plate 8, which can move forward and backward in the through groove 53 after being combined. A heat insulation tube 7 is fixed on one side of the fuse plate, and an electric heating wire 10 and a heating wire guide 9 are built into the heat insulation tube 7. The electric heating wire 10 and the heating wire guide 9 are fixed to each other and can move forward and backward relative to the heat insulation tube 7.

[0017] The driving member of this embodiment includes a first cylinder 11, a second cylinder 12, a first spring body 13 and a second spring 14. The first cylinder 11 is used to push the supporting plate 6 and the fuse plate 8 (including the insulation tube 7, the electric heating wire 10 and the heating wire guide body 9) forward together, and the reset of the above components is completed by pushing the first spring body 13 backward; the second cylinder 12 is used to push the electric heating wire 10 and the heating wire guide body 9 forward relative to the insulation tube, and their reset is completed by pushing the second spring 14 backward.

[0018] The middle of the through slot 53 has an upward and downward depression, and the two depressions are offset front and back; the middle of the fuse plate 8 has an upward and downward arc-shaped protrusion 81, and when the fuse plate is at different positions in the through slot, the upward protrusion is inserted into the upward depression or the downward protrusion is inserted into the downward depression, thereby making the fuse plate have different angles relative to the through slot. Therefore, when the support plate 6 and the fuse plate 8 move forward and backward, they can also simulate the opening and closing action of scissors.

[0019] When this embodiment is working, the first cylinder 11 pushes the support plate 6 and the fuse plate 8 (including the insulation tube 7, the electric heating wire 10 and the heating wire guide 9) forward, and the electric heating wire 10 starts to be powered on for heating. At the same time, the second cylinder 12 pushes the electric heating wire 10 and the heating wire guide 9 forward relative to the insulation tube, so that the electric heating wire 10 is exposed from the insulation tube; at this time, the fuse plate rotates a certain angle under the action of the protrusion 81, including the insulation tube 7, the electric heating wire 10 and the heating wire guide 9 also rotate, the support plate 6 holds the stitch 4, and the electric heating wire 10 fuses it. Then the electric heating wire is powered off, and the first spring 13 and the second spring 14 push all components to reset.

Claims

1. A thread cutting device for an automatic hosiery machine, comprising a base, a cutting member and a driving member are arranged on the base, the driving member drives the cutting member to move close to or close to the thread to be cut, characterized in that: The cutting piece includes a supporting plate and a fuse plate, and a heating wire is arranged on the fuse plate; the driving piece includes a first reciprocating piece and a second reciprocating piece, the first reciprocating piece drives the supporting plate and the fuse plate to move forward or backward together, and the second reciprocating piece drives the heating wire to move forward or backward relative to the fuse plate.

2. The thread breaking device of the automatic sock sewing machine according to claim 1, characterized in that: An insulation tube is fixed on the fuse plate, a heating wire guide is arranged inside the insulation tube, and the heating wire extends out of the front end of the heating wire guide; the second reciprocating member drives the heating wire guide to move relative to the insulation tube, so that the heating wire extends out of the insulation tube or retracts into the insulation tube.

3. The thread breaking device of the automatic sock sewing machine according to claim 1, characterized in that: The base has a through long groove inside, through which the supporting plate and the fuse plate pass and move; the middle of the long groove has upward and downward depressions, and the two depressions are offset front and back; the middle of the fuse plate has upward and downward arc-shaped protrusions, which match the depressions.

4. The thread breaking device of the automatic hosiery sewing machine according to claim 1, characterized in that: The first reciprocating member includes a first cylinder and a first spring, and the second reciprocating member includes a second cylinder and a second spring; the two cylinders push the corresponding components forward, and the two springs are responsible for resetting backward.

5. The thread breaking device of the automatic sock sewing machine according to any one of claims 1 to 4, characterized in that: The heating wire is an electric heating wire, and the current on and off of the heating wire is controlled by a circuit.

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