CN106283423A - A kind of sewing machine and hook line secant method - Google Patents

Abstract

The invention belongs to the technical field of sewing equipment, and particularly refers to a sewing machine and a thread hooking and cutting method. A suction pipe is arranged on the rear side of the needle plate, and a thread hooking and cutting device is arranged on the front side. The thread hooking and cutting device is composed of a sewing machine The controller controls the thread loosening of the thread loosening device to hook and secant the sutures and braids, and the suction pipe is controlled by the sewing machine controller to suck away the sutures and braids cut by the thread hooking and cutting device; the present invention consists of The power source is driven to hook and cut the line, and the power source is driven by electricity, which avoids the defects of high cost caused by the need for air source in the prior art and cannot be used by small garment factories, and has a wide range of applications.

Description

A kind of sewing machine and thread hook and secant method

Technical field:

The invention belongs to the technical field of sewing equipment, in particular to a sewing machine and a thread hooking and cutting method.

Background technique:

The current reverse sewing machine on the overlock sewing machine, that is, the wrapping head machine, is all for the purpose of sewing the empty loop thread braid, and uses air blowing or air suction to move or keep the empty loop thread braid in a suitable position for the next time. Sewing loops are sewn into the stitches of the fabric to keep the stitches looking good, but there is a big problem with this device, which is the need for an air source. The air source is generally only available in large-scale factories. The cost of this equipment is high, and the corresponding structure is relatively complicated. At the same time, there are many air pipes, which is not conducive to the tidy management of garment factories, especially not suitable for small garment factories without air sources. Therefore, this kind of The use of reverse sewing machines has certain limitations.

Invention content:

The purpose of the present invention is to provide a sewing machine driven by electricity, simple in structure and low in cost.

The present invention is achieved like this:

A sewing machine is provided with a suction pipe on the rear side of a needle plate and a thread hooking and cutting device on the front side, the thread hooking and cutting device is controlled by a sewing machine controller and cooperates with the loosening thread of the thread loosening device to carry out sewing and braiding. Thread hooking, thread cutting, and the suction pipe are controlled by the sewing machine controller to suck away the sutures and thread braids cut by the thread hooking and cutting device.

In the above sewing machine, the thread hooking and cutting device includes a thread hooking device and a thread cutting device, the thread hooking device is located above the needle plate, and the thread cutting device is located on the front side of the needle plate.

In the above-mentioned sewing machine, the thread cutting device includes a thread clamping plate fixed on the front side sewing table of the needle plate, and a thread cutting knife is arranged at one end of the thread clamping plate.

In the above sewing machine, an open slot is provided at one end of the thread clamping plate, and the thread cutter is arranged in the open slot.

In the above-mentioned sewing machine, the thread clamping plate is installed on the sewing table through a mounting bracket, and a bar-shaped hole is arranged on the mounting bracket, and the position of the fastener and the bar-shaped hole is adjusted to adjust the upper and lower positions of the thread clamping plate .

In the above-mentioned sewing machine, the thread hook device includes a power source and several connecting rods, the connecting rod is connected with the thread hook, the thread hook is located above the needle plate, and the power source drives several connecting rods to move and then drives the thread hook to perform hooking. line action.

In the above-mentioned sewing machine, the power source is fixed on the casing through a bracket, and a strip hole is arranged on the bracket, and the upper and lower positions of the power source can be adjusted through the strip hole and the fastener, so as to realize thread hook and The up and down positions of several linkages.

In the above-mentioned sewing machine, the connecting rods include connecting rod one and connecting rod two, one end of connecting rod one and connecting rod two are connected to the power source, and the other end of connecting rod one is hinged with a wired hook, The other end of connecting rod two is hinged with connecting rod four, and the other end of connecting rod four is hinged at the middle part of wire hook.

In the above sewing machine, the power source is a motor or a rotating electromagnet.

Another object of the present invention is to provide a thread hooking and secanting method for a sewing machine. The thread hooking and secanting device is controlled by the sewing machine controller when the needle is at the upper stop position, and when the presser foot is lifted and the thread loosening device loosens the thread , Hook the sutures and braids for secanting, and the cut sutures and braids are sucked away by the suction pipe controlled by the sewing machine controller or taken out with the fabric.

The outstanding advantages of the present invention compared with prior art are:

1. The present invention is driven by a power source to hook and cut lines, and the power source is driven by electricity, which avoids the defects of high cost and unusable use by small garment factories in the prior art that require an air source, and has a wide range of applications;

2. The present invention has simple structure and low cost;

3. The present invention cancels the traditional pneumatic complex reverse sewing structure, and can wrap multiple sutures when sewing, completely solving the problem of braids in the front section of the fabric after sewing.

Description of drawings:

Fig. 1 is a schematic diagram (1) of the present invention;

Fig. 2 is an enlarged schematic diagram of part A of Fig. 1;

Fig. 3 is a schematic diagram (two) of the present invention;

Fig. 4 is the schematic diagram of suction pipe of the present invention;

Fig. 5 is a schematic diagram of the secant device of the present invention;

Fig. 6 is a schematic diagram of the thread hooking and cutting thread device of the present invention using the thread pulling and thread trimming structure currently used on interlock sewing machines;

Fig. 7 is a structural schematic view (1) of the wire pulling and trimming of the present invention;

Fig. 8 is a structural schematic view (two) of the wire pulling and trimming of the present invention;

Fig. 9 is a schematic view of the thread loosening device of the present invention arranged on the casing.

detailed description:

The present invention is further described below with specific embodiment, referring to Fig. 1-9:

A sewing machine is provided with a suction pipe 2 on the rear side of the needle plate 1 and a thread hooking and cutting device on the front side. The thread hooking and cutting device is controlled by the sewing machine controller and cooperates with the thread loosening device to loosen the stitches and threads. The braid is hooked and cut, and the suction pipe 2 is controlled by the sewing machine controller to suck away the suture 5 and the braid cut off by the hook and cut device. Specifically, the time when the controller of the sewing machine controls the action of the thread hooking and cutting device is that when the machine needle 3 is in the upper needle stop position, the presser foot 4 is lifted and cooperates with the thread loosening of the thread loosening device. The suture thread and thread braid that cut can be sucked away by air suction pipe 2, also can be taken out with cloth.

The loosening device of the present invention can adopt following structure:

Comprise a driver, generally select cylinder 17 for use, also can select electromagnet etc. for use, the outer end of the cylinder rod of cylinder 17 is connected with loosening piece 18, is provided with strip hole 19 on the loosening piece 18, and loosening piece 18 passes through Screw 20 is connected on the mounting base 21, and mounting base 21 is motionless, and one end of mounting base 21 is fixed on the cylinder block 22 of cylinder 17, and the other end is connected on the wire clamp 23. Cylinder drives 17 moving thread loosening pieces 18 to move left and right along strip hole 19, drives the lower end of thread loosening piece 18 to snap into between the thread pressing pieces 24 of thread gripper 23 when cylinder rod stretches out, reaches the purpose of loosening thread. The cylinder rod resets, and the lower end of the thread loosening sheet 18 leaves the thread pressing sheet 24 of the thread gripper 23. The action of cylinder 17 is controlled by controller.

The thread loosening piece of the thread loosening device can also be designed to rotate, and the thread loosening piece is driven by a motor or a rotating electromagnet to rotate and snap into or leave the thread pressing piece of the thread clamp to complete the thread loosening action.

Further, the thread hooking and cutting device includes a thread hooking device and a thread cutting device, the thread hooking device is located above the needle board 1 , and the thread cutting device is located on the front side of the needle board 1 .

The thread cutting device includes a thread clamping plate 7 fixed on the front side sewing platform 6 of the needle plate 1 , and a thread cutting knife 8 is arranged at one end of the thread clamping plate 7 . Thread cutter 8 is vertically arranged, and the blade of thread cutter 8 is arranged outwards, is convenient to cut off and is hooked into the suture 5 in the clamping plate 7.

One end of the clamping plate 7 is provided with an open slot 9 , and the thread cutter 8 is arranged in the open slot 9 . The thread cutter 8 can also be directly fixed on one side of the thread clamping plate 7 .

Described clamping plate 7 is installed on the seam platform 6 by mounting bracket, is provided with strip hole on mounting bracket, adjusts the position of fastener and strip hole and then regulates the up and down position of clamping plate 7.

The upper and lower positions of the clamping plate 7 and the secant knife 8 are adjustable, which can avoid interference and make sewing more convenient and smooth.

The clamping plate 7 of the present invention can also be directly fixed on the sewing platform 6 .

The wire hook device includes a power source 10 and several connecting rods, and the connecting rods are connected with the wire hook 11 . The thread hook 11 is located above the needle plate 1, and the power source 10 drives a plurality of connecting rods to drive the thread hook 11 to perform the thread hooking action.

Specifically, the power source 10 is fixed on the casing 13 through a bracket 12, and a bar-shaped hole is provided on the bracket 12, and the upper and lower positions of the power source 10 can be adjusted through the bar-shaped hole and fasteners, thereby realizing the wire hook 11 Up and down position with several linkages. The upper and lower positions of thread hook 11 and some connecting rods are adjustable, which can avoid interference and make sewing more convenient and smooth.

Described several connecting rods comprise connecting rod one 14, connecting rod two 15, and one end of connecting rod one 14 and connecting rod two 15 are all connected on the power source 10, and the other end of connecting rod one 14 is hinged wired hook 11, connects The other end of bar two 15 is hinged with connecting rod four 16, and the other end of connecting rod four 16 is hinged at the middle part of wire hook 11.

The power source 10 is a motor or a rotating electromagnet.

This embodiment takes a four-thread overlock sewing machine as an example.

The thread hook 11 hooks the four sutures, and pulls the suture 5 at the secant knife 8 and the clamping plate 7 in Figure 2. After the thread is secant, the clamping plate 7 clamps the four sutures directly connected with the needle looper. Line, namely the four lines above the line hook 11, the four lines below after cutting are sucked away by the suction pipe 2 or taken away with the cloth, and a flow process is completed at this moment.

Working principle of the present invention:

Firstly, when the machine needle 3 is at the needle stop position, lift the presser foot 4, at this time, a power source 10 drives several connecting rods to drive the thread hook 11 to move, and cooperates with the thread loosening function of the thread loosening device to realize thread hooking and thread hooking. 5 Bring it back to the designated position. During this process, the thread hook 11 passes through the thread cutting knife 8 and the thread clamping plate 7, and cuts off the suture 5. At the same time, it clamps several sutures connected with the machine needle looper. 5. The other end, that is, some sutures that are connected with the braid, will be sucked away by the suction pipe 2 or brought out with the cloth.

The suction of the suction pipe 2 is provided by an air source and a vacuum generator.

In addition to the above-mentioned structure, the thread hooking and cutting device can also adopt the thread pulling and thread trimming structure currently used on interlock sewing machines, as shown in Figures 6, 7 and 8. The thread pulling and thread trimming structure realizes the function of thread hooking, clamping, and thread trimming, and at the same time assists with the functions of thread loosening and air suction to realize the required functions of the present invention. At this time, the wire hook device and the secant device are installed in one piece.

Another object of the present invention is to provide a method for thread hooking and secanting of a sewing machine as described above. The presser foot is lifted, and the thread loosening device is used to loosen the thread. At the same time, the hooking and cutting device is also controlled to hook the sutures and thread braids and then secant them. The cut sutures and thread braids are sucked by the sewing machine controller to control the suction pipe 2 Go or take out with the cloth. At this point a process is complete.

The above-described embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Therefore: all equivalent changes made according to the shape, structure and principle of the present invention should be covered by the present invention. within the scope of protection.

Claims (10)

1. a sewing machine, it is characterised in that: the rear side at needle plate is provided with aspiration channel, front side is provided with hook line thread cutting device, Hook line thread cutting device loose ends of thread-loosening device with sewing machine control controls to carry out hooking line, secant, air draught by suture, line pigtail The suture that pipe is controlled hook line thread cutting device cuts off by sewing machine control siphons away with line pigtail.

A kind of sewing machine the most according to claim 1, it is characterised in that: described hook line thread cutting device includes wired hook device And thread cutting device, described line hooks device and is positioned at above needle plate, and thread cutting device is positioned at the front side of needle plate.

A kind of sewing machine the most according to claim 2, it is characterised in that: described thread cutting device includes before being fixed on needle plate Clamp on latasuture platform, is provided with thread cutter in one end of clamp.

A kind of sewing machine the most according to claim 3, it is characterised in that: one end of described clamp is provided with open slot, Thread cutter is arranged in open slot.

5. according to a kind of sewing machine described in claim 3 or 4, it is characterised in that: described clamp is installed by mounting bracket On seam platform, mounting bracket is provided with bar hole, regulation securing member and the position of bar hole and then regulate the upper of clamp Lower position.

A kind of sewing machine the most according to claim 2, it is characterised in that: described line hooks device and includes power source and some Connecting rod, connecting rod links with line and connects, and line hooks the top being positioned at needle plate, and power source drives some connecting rod actions and then band moving-wire hook to carry out Hook line action.

A kind of sewing machine the most according to claim 6, it is characterised in that: described power source is fixed on casing by support On, support is provided with bar hole, the upper-lower position of power source can be regulated by bar hole and securing member, and then realize line hook Upper-lower position with some connecting rods.

8. according to a kind of sewing machine described in claim 6 or 7, it is characterised in that: described some connecting rods include connecting rod one, connect Bar two, one end of connecting rod one and connecting rod two is both connected on power source, the hinged wired hook of the other end at connecting rod one, connecting rod two The other end is hinged with connecting rod four, the middle part of the hinged online hook of the other end of connecting rod four.

A kind of sewing machine the most according to claim 6, it is characterised in that: described power source is motor or rotating electromagnetic Ferrum.

10. the hook line secant method of a kind of sewing machine as described in any one of claim 19, it is characterised in that: by sewing machine Controller controls to hook line thread cutting device when stopping pin position on eedle is in, coordinate presser feet to lift, thread-loosening device loose ends time, will seam Line, line pigtail hook to come to carry out secant, and the suture cut off is controlled aspiration channel with line pigtail by sewing machine control and siphons away or with cloth material strip Go out.