CN203593870U - Sewing machine sewing starting device with fixed thread cutting device - Google Patents

Abstract

The utility model belongs to the technical field of sewing machines, and particularly refers to a sewing machine sewing device with a fixed thread cutting device, which includes a thread clamping device that clamps the end of the upper thread after the thread trimming is completed after sewing is completed sequentially, and the sewing thread is clamped after the next sewing starts. The thread cutting device is used to cut off the thread end to eliminate the residual thread ball. The structure of the thread cutting device is: a cutter is arranged on the bottom plane of the presser foot and the rear side of the needle drop hole, and the bottom plane of the cutter is flush with the bottom plane of the presser foot or the cutter The bottom plane of the presser foot is located within the bottom plane of the presser foot. The thread clamping device provided by the utility model can clamp the thread end after thread trimming, which eliminates the problem that the upper thread is off when the seam is started; the thread trimmer cuts the upper thread when the seam is started. Residual threads at the beginning of the seam fundamentally eliminate the problem of seam balls (bird's nest phenomenon) on the sewing material.

Description

A kind of Sewing machines with fixing thread cutting device plays seam device

Technical field:

The utility model belongs to sewing machine technique field, refers in particular to a kind of Sewing machines with fixing thread cutting device and plays seam device.

Background technology:

Non-off-line in order to have guaranteed seam when flat seam machine plays seam, need to keep sufficiently long the end of a thread at the line nose end of pin.This end of a thread major part in sewing process can remain in cloth and play seam place, forms a ball of string (being commonly called as Bird's Nest), affects sewing attractive in appearance.

In current flat seam machine, in order to solve the impact of a ball of string (being commonly called as Bird's Nest), on head threading path, be provided with electronics tension disk (few Bird's Nest electromagnet), by clamp line in the time stitching, a ball of string be pressed onto to the sewing back side, guarantee the attractive in appearance of sewing front.But using electronics tension disk is local change ball of string problem, still has a ball of string at the sewing back side.

Summary of the invention:

The purpose of this utility model is to provide a kind of clamps upper thread the end of a thread once sewing after having finished trimming, sews next time after starting the end of a thread is cut off, and plays seam device with the Sewing machines with fixing thread cutting device of eliminating a residual ball of string.

The utility model is achieved in that

A kind of Sewing machines with fixing thread cutting device plays seam device, include and finished the thread cutting device clamping the wire-clamping device of upper thread the end of a thread after trimming and suture the end of a thread is cut off to eliminate a residual ball of string after next time, sewing started by sewing successively, the structure of described thread cutting device is: the rear side at pressing sole plane, needle falling hole is provided with cutting knife, within baseplane concordant with pressing sole plane or cutting knife, the baseplane of cutting knife is positioned at pressing sole plane.

Above-mentioned wire-clamping device is independent wire-clamping device, concrete structure is: include the mount pad being connected with head, mount pad is positioned at a side of presser feet, on mount pad, be provided with driver and clamp, the outer end of clamp is provided with opening, the moved end of driver arranges wired hook, the front end of line hook is hook portion, the hook portion of line hook and the outer end of clamp are all near presser feet setting, line is hooked in that the opening stretching out under the control of driver on clamp hooks suture and the opening of the clamp of retracting is clipped in suture in clamp, and the action of described driver is by controller control.

The side that one end of above-mentioned mount pad is fixed on the baseplane at presser bar place on head, the other end is positioned at presser feet, be installed with driver mount pad at the other end of mount pad, on driver mount pad, be provided with driver, on the baseplane of the driver mount pad of driver one side, be installed with clamp.

Above-mentioned wire-clamping device is presser foot clamping line apparatus, concrete structure is: one end of steel wire rope is connected with the movable end of the driver that is arranged on base plate baseplane, the other end is successively through base plate, head, support, depression bar and mount pad are fixed on oscillating deck, described mount pad is positioned at a side of presser feet handle, on mount pad, be hinged with oscillating deck, the lower end of oscillating deck is connected with slide head, one end of slide-bar is connected with slide head, the other end is arranged on the pilot hole of presser feet base plate, the described steel wire rope between swing arm fork and mount pad is set with back-moving spring outward, wired hook is also set on slide head, the other end of line hook is arranged on the upper plane of presser feet base plate, the moving direction of line hook is parallel with the axis of slide-bar, in the upper plane of presser feet base plate, the top of line hook is installed with tension disc, driver drives steel wire rope, steel wire rope pulls oscillating deck to rotate and then drives the slide head that is positioned at oscillating deck lower end, slide-bar action, slide-bar moves axially band moving-wire hook and moves and realize the action of hook line, driver resets, steel wire rope reset strap moving-wire uncinate gyrus contracting under the effect of back-moving spring is clipped between line hook and tension disc suture and realizes gripping action, the action of described driver is by controller control.

Above-mentioned oscillating deck is fixed on mount pad and is realized and being articulated and connected by axial screw.

Above-mentioned support is fixed on the front end face of head, is provided with the cable-through hole passing through for steel wire rope in the lower end of support.

In above-mentioned depression bar, be axially provided with endoporus, be provided with the through hole of endoporus UNICOM on the upper end of depression bar, the outer wall of lower end, steel wire rope passes the through hole of depression bar upper end, the endoporus of depression bar successively, and stretches out outside depression bar through the through hole of depression bar lower end.

One end of above-mentioned slide head is provided with opening, is provided with joint axis in opening, and the lower end of oscillating deck is provided with prong, and the lower end of oscillating deck is arranged in the opening of slide head, and joint axis is arranged in the prong of oscillating deck.

The upper end of above-mentioned oscillating deck is provided with screw, and the end of screw is connected with mount pad, on the screw rod between head and the oscillating deck of screw, is provided with nut.

Above-mentioned driver is cylinder or electromagnet.

The advantage that the utility model is given prominence to is compared to existing technology:

1, wire-clamping device of the present utility model can be realized and after trimming, clamp the end of a thread, has stopped the problem of upper thread off-line in the time playing seam;

2, thread cutting device of the present utility model cuts off upper thread and plays the residual the end of a thread of seam playing when seam, has fundamentally eliminated and on sewing, has played suture group (Bird's Nest phenomenon) problem.

Accompanying drawing explanation:

Fig. 1 is one of schematic diagram of embodiment 1;

Fig. 2 be embodiment 1 schematic diagram two;

Fig. 3 is the schematic diagram of embodiment 2;

Fig. 4 is the schematic diagram that the steel wire rope of embodiment 2 is connected with electromagnet;

Fig. 5 is one of structural representation of the presser feet part of embodiment 2;

Fig. 6 is the partial schematic diagram that the steel wire rope of embodiment 2 is connected with support and depression bar;

Fig. 7 is the partial cutaway schematic that the steel wire rope of embodiment 2 is connected with support and depression bar;

Fig. 8 be the presser feet part of embodiment 2 structural representation two;

Fig. 9 be the presser feet part of embodiment 2 structural representation three;

Figure 10 is the schematic diagram of the oscillating deck of embodiment 2.

The specific embodiment:

With specific embodiment, the utility model is further described below,

Embodiment 1: referring to Fig. 1-2:

What the wire-clamping device of the present embodiment adopted is independent wire-clamping device:

A kind of Sewing machines with fixing thread cutting device plays seam device, include and finished the thread cutting device clamping the wire-clamping device of upper thread the end of a thread after trimming and suture the end of a thread is cut off to eliminate a residual ball of string after next time, sewing started by sewing successively, the structure of described thread cutting device is: be provided with cutting knife 2 at the rear side of pressing sole plane 1, needle falling hole, within baseplane concordant with pressing sole plane 1 or cutting knife 2, the baseplane of cutting knife 2 is positioned at pressing sole plane 1.Cutting knife 2 is fixed in pressing sole plane 1 by screw 3.

Above-mentioned wire-clamping device is independent wire-clamping device, concrete structure is: include the mount pad 5 being connected with head 4, mount pad 5 is positioned at a side of presser feet 6, on mount pad 5, be provided with driver 7 and clamp 8, the outer end of clamp 8 is provided with opening 9, the moved end 10 of driver 7 arranges wired hook 11, the front end of line hook 11 is hook portion, hook portion is arranged in the opening 9 of clamp 8, the outer end of the hook portion of line hook 11 and clamp 8 all arranges near presser feet 6, line hook 11 stretches out under the control of driver 7 that opening 9 on clamp 8 hooks suture and the opening 9 of the clamp 8 of retracting is clipped in suture in clamp 8, the action of described driver 7 is by controller control.

The side that one end of above-mentioned mount pad 5 is fixed on the baseplane 13 at head 4 upperpush rod 12 places, the other end is positioned at presser feet 6, be installed with driver mount pad 14 at the other end of mount pad 5, on driver mount pad 14, be provided with driver 7, on the baseplane of the driver mount pad 14 of driver 7 one sides, be installed with clamp 8.

Above-mentioned driver 7 is cylinder or electromagnet.Line hook 11 is arranged on the cylinder rod of cylinder or on the iron core of electromagnet.

The operation principle of the present embodiment is:

In the course of the work, when the front trimming of once having sewed finishes, driver 7 promotes line hook 11 and stretches out, and by the end of a thread uncinate gyrus on pinprick, is clipped in clamp 8.

In the time that next time, sewing started, line is sewn in cloth, simultaneously because the end of a thread is sandwiched in clamp 8.The end of a thread is strained on the edge of a knife of cutting knife 2 by clamp 8 and sewing, because continuous feeding, the end of a thread will be cut off by the edge of a knife of cutting knife 2 in the time being tightened to a certain degree, forms the effect of having cut off suture head.

Embodiment 2: referring to figure: 3-10:

The difference of the structure of the present embodiment and embodiment 1 is: the wire-clamping device of the present embodiment is presser foot clamping line apparatus:

Above-mentioned wire-clamping device is presser foot clamping line apparatus, concrete structure is: one end of steel wire rope 15 is connected with the movable end of the driver 17 that is arranged on base plate 16 baseplanes, the other end is successively through base plate 16, head 4, support 18, depression bar 12 and mount pad 19 are fixed in the fork 24 of oscillating deck 20, described mount pad 19 is positioned at a side of presser feet handle 21, on mount pad 19, be hinged with oscillating deck 20, the lower end of oscillating deck 20 is connected with slide head 27, one end of slide-bar 22 is connected with slide head 27, the other end is arranged on the pilot hole of presser feet base plate 23, outside steel wire rope 15 between swing arm fork 24 and mount pad 19, be set with back-moving spring 25, wired hook 26 is also set on slide head 27, the hook portion of line hook 26 is arranged on the upper plane of presser feet base plate 23, the moving direction of line hook 26 is parallel with the axis of slide-bar 22, in the upper plane of presser feet base plate 23, the top of line hook 26 is installed with tension disc 28, driver 17 drives steel wire rope 15, steel wire rope 15 pulls oscillating deck 20 to rotate and then drives the slide head 27 that is positioned at oscillating deck 20 lower ends, slide-bar 22 moves, slide-bar 22 moves axially band moving-wire hook 26 and moves and realize the action of hook line, driver 17 resets, steel wire rope 15 reset strap moving-wire hook 26 retractions under the effect of back-moving spring 25 are clipped between line hook 26 and tension disc 28 suture and realize gripping action, the action of described driver 17 is by controller control.

Above-mentioned oscillating deck 20 is fixed on mount pad 19 and is realized and being articulated and connected by axial screw 29.

Above-mentioned support 18 is fixed on the front end face 30 of head, is provided with the cable-through hole 31 passing through for steel wire rope 15 in the lower end of support 18.

The interior endoporus 32 that is axially provided with of above-mentioned depression bar 12, on the upper end of depression bar 12, the outer wall of lower end, be provided with the through hole 33,34 of endoporus 32 UNICOMs, steel wire rope 15 passes the through hole 33 of depression bar 12 upper ends, the endoporus 32 of depression bar 12 successively, and stretches out outside depression bar 12 through the through hole 34 of depression bar 12 lower ends.

One end of above-mentioned slide head 27 is provided with opening, is provided with joint axis 35 in opening, and the lower end of oscillating deck 20 is provided with prong 36, and the lower end of oscillating deck 20 is arranged in the opening of slide head 27, and joint axis 32 is arranged on the prong interior 36 of oscillating deck 20.

The upper end of above-mentioned oscillating deck 20 is provided with screw 37, and the end of screw 37 is connected with mount pad 19 contacts, on the screw rod between head and the oscillating deck 20 of screw 37, is provided with nut 38.Screw 37 is spacing use, the final position that restraining line hook 26 is retracted.Oscillating deck 20 is reset spring 25 while pressing, and the end of screw 37 is pushed up on mount pad 19 spacing, and screw 37 is screwed into back-outs that any can adjust the final position of line hook 26.Nut 38 is lock-screw 37 use.

Above-mentioned driver 17 is cylinder or electromagnet.The movable end of electromagnet is connected with loose ends seat, and one end of steel wire is fixed on loose ends seat 39.

The operation principle of the present embodiment:

In the course of the work, front once sewing when trimming, electromagnetic actuation promotes loose ends seat 39 and swings, and pulls steel wire rope 15; Steel wire rope 15 pulls oscillating deck 20 to swing around axial screw 29 center; The prong 36 of oscillating deck 20 acts on and in joint axis 35, promotes joint 27 and move; The line hook 26 being fixed on joint 27 stretches out forward along with joint 27; While completing to trimming, electromagnet discharges, and line hook 26 toward retraction, by the end of a thread uncinate gyrus on pinprick, is clipped in tension disc 28 times under the effect of back-moving spring 25.

In the time that next time, sewing started, line is sewn in cloth, simultaneously because the end of a thread is sandwiched in nip line plate 28 times.The end of a thread is strained on the edge of a knife of cutting knife 2 by tension disc 28 and sewing, because continuous feeding, the end of a thread will be cut off by the edge of a knife of cutting knife 2 in the time being tightened to a certain degree, forms the effect of having cut off suture head.

Above-described embodiment is only one of preferred embodiment of the present utility model; not limit practical range of the present utility model with this; therefore: all equivalences of doing according to shape of the present utility model, structure, principle change, within all should being covered by protection domain of the present utility model.

Claims (10)

1. A sewing machine sewing device with a fixed thread trimming device is characterized in that: it includes a thread clamping device that clamps the thread end of the upper thread after the completion of thread trimming in sequence and cuts off the thread end after the next sewing starts to eliminate The thread cutting device for the residual thread ball, the structure of the thread cutting device is: a cutting knife is arranged on the bottom plane of the presser foot and the rear side of the needle drop hole, the bottom plane of the cutting knife is flush with the bottom plane of the presser foot or the bottom plane of the cutting knife is located within the plane of the sole of the presser foot. 2. A sewing machine sewing device with a fixed thread cutting device according to claim 1, characterized in that: said thread clamping device is an independent thread clamping device, and the specific structure is: it includes a mounting seat connected to the machine head , the mounting seat is located on one side of the presser foot, the driver and the clamping plate are arranged on the mounting seat, the outer end of the clamping plate is provided with an opening, the moving end of the driver is provided with a wire hook, the front end of the wire hook is a hook, The hook part of the hook and the outer end of the clamping plate are set close to the presser foot. Under the control of the driver, the thread hook extends out of the opening of the clamping plate to hook the suture and retracts the opening of the clamping plate to clamp the suture in the clip. In the line board, the action of the driver is controlled by the controller. 3. A sewing machine sewing device with a fixed thread cutting device according to claim 2, characterized in that: one end of the mounting base is fixed on the bottom plane where the presser foot bar on the machine head is located, and the other end is located on the bottom plane where the presser foot bar is located. On one side of the foot, a driver mount is fixed at the other end of the mount, a driver is arranged on the driver mount, and a clamping plate is fixed on the bottom plane of the driver mount on the driver side. 4. A sewing machine sewing device with a fixed thread cutting device according to claim 1, characterized in that: the thread clamping device is a presser foot clamping device, and the specific structure is: one end of the wire rope is connected to the bottom of the bottom plate The movable end of the planar driver is connected, and the other end is fixed on the swing plate through the base plate, machine head, bracket, pressing rod and mounting seat in sequence. The mounting seat is located on one side of the presser handle, and is hinged on the mounting seat. Swing plate, the lower end of the swing plate is connected with a sliding head, one end of the sliding shaft is connected with the sliding head, the other end is set on the guide hole of the presser foot plate, and the wire rope between the fork of the swing rod and the mounting seat is covered with a return spring , there is also a thread hook on the sliding head, the other end of the thread hook is set on the upper plane of the presser foot plate, the moving direction of the thread hook is parallel to the axis of the sliding shaft, and the upper plane of the presser foot plate and above the thread hook are fixed. There is a pressure plate, the driver drives the wire rope, the wire rope pulls the swing plate to rotate, and then drives the sliding head and the sliding shaft located at the lower end of the swing plate to move, the axial movement of the sliding shaft drives the wire hook to move to realize the hooking action, the driver resets, and the wire rope moves under the return spring. Under the action, the reset drives the wire hook to retract, so that the suture is clamped between the wire hook and the thread pressing plate to realize the thread clamping action, and the action of the driver is controlled by the controller. 5 . A sewing machine sewing device with a fixed thread cutting device according to claim 4 , characterized in that: the swing plate is fixed on the mounting base by axial screws to realize hinged connection. 6 . 6. A sewing machine sewing device with a fixed thread cutting device according to claim 4, characterized in that: said bracket is fixed on the front end of the machine head, and a thread passing wire rope is provided at the lower end of the bracket hole. 7. A sewing device for sewing machines with a fixed thread cutting device according to claim 4, characterized in that: said pressure rod is provided with an inner hole in the axial direction, and the outer walls of the upper and lower ends of the pressure rod are provided with The through hole of the inner hole Unicom, the steel wire rope passes through the through hole at the upper end of the pressure bar, the inner hole of the pressure bar successively, and passes through the through hole at the lower end of the pressure bar to stretch out of the pressure bar. 8. A sewing machine sewing device with a fixed thread cutting device according to claim 4, characterized in that: one end of the sliding head is provided with an opening, a joint shaft is provided in the opening, and the lower end of the swing plate is provided with a For the fork, the lower end of the swing plate is set in the opening of the sliding head, and the joint shaft is set in the fork of the swing plate. 9. A sewing machine sewing device with a fixed thread cutting device according to claim 4, characterized in that: the upper end of the swing plate is provided with a screw, the end of the screw is connected with the mounting seat, and the head of the screw is A nut is arranged on the screw rod between the swing plate. 10. A sewing machine sewing device with a fixed thread cutting device according to claim 2 or 4, characterized in that: said driver is an air cylinder or an electromagnet.

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