CN108589081A - The cutting facility of column sewing machine - Google Patents

Abstract

The invention provides a thread cutting device of a column type sewing machine, which comprises: a feeding mechanism and a thread cutting mechanism located on one side of the feeding mechanism. The thread trimming device of the column type sewing machine of the present invention effectively solves the problem of long remaining threads in sewing materials by optimizing the thread trimming structure and mode, simplifies the process of products, saves labor, saves sutures, and reduces labor intensity.

Description

Thread trimming device of column type sewing machine

technical field

The invention relates to the technical field of sewing machines, in particular to a thread trimmer of a column type sewing machine.

Background technique

The column type sewing machine is a kind of sewing machine. The existing column type sewing machine adopts the tangent method combining the movable knife and the fixed knife. Due to the limitation of the structure, the distance between the tangent point and the needle plate hole is relatively far, resulting The threads on the material are relatively long. Therefore, a special process is required to remove the thread ends, which in turn affects the processing efficiency. Therefore, in view of the above problems, it is necessary to propose a further solution.

Contents of the invention

The object of the present invention is to provide a thread trimming device of a column type sewing machine, so as to overcome the deficiencies in the prior art.

In order to achieve the purpose of the above invention, the present invention provides a thread trimming device for a column sewing machine, which includes: a feeding mechanism and a thread trimming mechanism located on one side of the feeding mechanism;

The feeding mechanism includes: a lower feeding wheel, a transmission assembly, a transmission shaft, a helical gear, a feeding shaft and a one-way driver, the lower feeding wheel is connected to one end of the transmission shaft through the transmission assembly, and the transmission shaft The other end of the pump is connected to one end of the feeding shaft through the helical gear, and the other end of the feeding pump is connected to the one-way driver in a driving manner;

The thread trimming mechanism includes: a movable knife seat, a secant movable knife, a thread hook movable knife, a thread clamp, a thread clamp bracket, a connecting rod assembly, a thread trimming cam, a needle roller bearing and a thread trimming electromagnet. The knife and the hook moving knife are set opposite to each other, both are installed on the moving knife seat and connected with the connecting rod assembly, the thread trimming cam is located on the roller sleeve, and the connecting rod assembly passes through the The thread-cutting cam and the roller sleeve are connected with the thread-cutting electromagnet, and the thread clip is located at one side of the hooking moving knife, and is fixed by the thread clip bracket on the moving knife seat.

As an improvement of the thread trimming device of the column type sewing machine of the present invention, the transmission assembly includes: a shaft coupling and a bearing sleeve, the lower feeding wheel is in transmission connection with the upper end of the shaft coupling, and the lower end of the shaft coupling It is connected with one end of the transmission shaft through the bearing sleeve.

As an improvement of the thread trimming device of the column type sewing machine of the present invention, the coupling includes: an upper part of the coupling and a lower part of the coupling, and the upper part of the coupling has an upper projection matched with the lower feeding wheel And a lower protrusion matched with the lower part of the shaft coupling, the upper protrusion is perpendicular to the lower protrusion.

As an improvement of the thread cutting device of the column type sewing machine of the present invention, the secant movable knife includes a first handle and a first cutting edge located at one end of the first handle, and the thread hook movable knife includes a second knife The handle, the hook line part at one end of the second knife handle, and the second cutting edge at the front section, the cutting edge of the second cutting edge is set towards the hook line part.

As an improvement of the thread trimming device of the column sewing machine of the present invention, arc-shaped grooves for accommodating the first knife handle and the second knife handle are provided on the movable knife seat.

As an improvement of the thread trimming device of the column type sewing machine of the present invention, the connecting rod assembly includes: a moving knife connecting rod, a connecting rod limiting plate, and a connecting rod, one end of the moving knife connecting rod is a U-shaped end, and the U-shaped end They are respectively connected with the secant moving knife and the hook line moving knife, and the other end of the connecting rod of the moving knife is connected with one end of the connecting rod through the connecting rod limiting plate.

As an improvement of the thread trimming device of the column sewing machine of the present invention, the thread trimming mechanism further includes a thread trimming electromagnet seat, and the thread trimming electromagnet is fixed on the thread trimming electromagnet seat.

As an improvement of the thread trimming device of the column type sewing machine of the present invention, the thread trimming device of the column type sewing machine also includes a column base and a needle plate, the needle plate is installed on the upper end of the column base, the feeding mechanism and the shear The thread mechanism part is accommodated in the space defined by the stand and the needle plate.

As an improvement of the thread trimming device of the column type sewing machine of the present invention, an adjusting screw is installed on the bottom of the needle plate, and the adjusting screw presses against the upper arc surface of the secant moving knife.

As an improvement of the thread trimming device of the column type sewing machine of the present invention, the thread trimming device of the column type sewing machine further includes a lower shaft, and the thread trimming cam is mounted on the lower shaft.

Compared with the prior art, the beneficial effect of the present invention is that the thread trimming device of the column type sewing machine of the present invention effectively solves the problem of long residual thread ends of sewing materials by optimizing the thread trimming structure and method, simplifies the process of the product, and saves labor , saving sutures and reducing labor intensity.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the three-dimensional exploded schematic diagram of a specific embodiment of the thread trimming device of the column type sewing machine of the present invention;

Fig. 2 is a three-dimensional exploded schematic view of the thread trimming mechanism in Fig. 1 .

Detailed ways

The present invention will be described in detail below in conjunction with the implementations shown in the drawings, but it should be noted that these implementations are not limitations of the present invention, and those of ordinary skill in the art based on the functions, methods, or structural changes made by these implementations Equivalent transformations or substitutions all fall within the protection scope of the present invention.

As shown in Figures 1 and 2, the thread cutting device of the column sewing machine of the present invention includes: a feeding mechanism and a thread cutting mechanism located on one side of the feeding mechanism.

The feeding mechanism is used to realize sewing feeding, and the feeding mechanism includes: a lower feeding wheel 1 , a transmission assembly, a transmission shaft 2 , a helical gear 3 , a feeding shaft 4 and a one-way driver 5 .

Wherein, the lower feeding wheel 1 is in transmission connection with one end of the transmission shaft 2 through the transmission assembly, and the other end of the transmission shaft 2 is in transmission connection with one end of the transmission shaft 4 through the helical gear 3, so The other end of the feeding shaft is in transmission connection with the one-way driver 5 .

In one embodiment, the transmission assembly includes: a shaft coupling and a bearing sleeve 8, the lower feeding wheel 1 is in transmission connection with the upper end of the coupling, and the lower end of the coupling passes through the bearing sleeve 8 It is connected with one end of the transmission shaft 2.

Further, in order to be suitable for the transmission between the lower feeding wheel 1 and the transmission shaft 2, the coupling includes: an upper coupling part 6 and a lower coupling part 7, and the coupling upper part 6 has a The upper lug matched with the lower feeding wheel 1 and the lower lug matched with the lower part 7 of the shaft coupling, the upper lug is perpendicular to the lower lug. Correspondingly, the lower feeding wheel 1 and the transmission shaft 2 are provided with card slots correspondingly.

The thread trimming mechanism is used to realize the cutting of the residual thread ends, and the thread trimming mechanism includes: a movable knife seat 9, a secant movable knife 10, a thread hook movable knife 11, a thread clamp 12, a thread clamp bracket 13, and a thread trimming cam 14 , connecting rod assembly, roller sleeve 15 and thread trimming electromagnet 16.

Wherein, the secant movable knife 10 and the thread hook movable knife 11 are arranged oppositely, and both are installed on the movable knife seat 9 and connected with the connecting rod assembly. The guide pin of the secant moving knife 10 is designed as an eccentric pin, which is convenient for fine-tuning during thread trimming. In one embodiment, the secant movable knife 10 includes a first handle and a first cutting edge located at one end of the first handle, and the thread hook movable knife 11 includes a second handle and a first cutting edge located at one end of the first handle. The hook line part at one end of the handle and the second cutting edge located at the front section, the cutting edge of the second cutting edge is set towards the hook line part. Correspondingly, arc-shaped grooves for accommodating the first knife handle and the second knife handle are opened on the movable knife seat 9 .

The thread-cutting cam 14 is located above the needle bearing 15 , and the connecting rod assembly is connected with the thread-cutting electromagnet 16 through the thread-cutting cam 14 and the needle bearing 15 . Meanwhile, the thread trimming cam 14 is installed on the lower shaft 17 . In addition, the thread trimming mechanism also includes a thread trimming electromagnet seat 18 on which the thread trimming electromagnet 16 is fixed.

The wire clamp 12 is located on one side of the hooking knife 11 and is fixed by the wire clamp bracket 13 on the movable knife seat 9 . Therefore, when the remaining thread brought back by the thread hooking knife passes through the thread clamp 12, the bottom thread is clamped between the thread hooking knife and the thread clamp 12, so as to prepare for the next seam opening and prevent the seam from going off. .

In one embodiment, the connecting rod assembly includes: a moving knife connecting rod 19, a connecting rod limiting plate 20, and a connecting rod 21. One end of the moving knife connecting rod 19 is a U-shaped end, and the U-shaped end is respectively connected to the The secant movable knife 10 is connected with the thread hook movable knife 11 , and the other end of the movable knife connecting rod 19 is connected with one end of the connecting rod 21 . The position is fixed by the connecting rod limiting plate 20 .

In addition, the thread trimming device of the column type sewing machine also includes a column base 22 and a needle plate 23, the needle plate 23 is installed on the upper end of the column base 22, and the feeding mechanism and the thread trimming mechanism are partially accommodated in the column In the space defined by the seat 22 and the needle plate 23. Wherein, an adjusting screw for adjusting the shearing force of the hob is installed on the bottom of the needle plate 23 , and the adjusting screw presses against the upper arc surface of the secant moving knife 10 .

Thereby, when described thread-cutting mechanism works, push up by thread-cutting electromagnet 16, drive connecting rod 21 to do upward thrust, drive movable knife connecting rod 19 upwards simultaneously, and drive two thread-cutting movable knives to do relative motion. After two thread cutting moving knives crossed the center of the needle plate 23 holes, the bottom thread automatically slid into the thread hook groove of the hook thread moving knife 11. At this time, after the thread trimmer cam 14 installed on the lower shaft 17 rotates at a corresponding angle with the machine, it drives the connecting rod 21 to move downward, thereby driving the two thread trimmer moving knives to move toward each other. During the separation process, the two thread trimmer movable knives Cut off the suture in the thread hook groove to complete the thread trimming action.

To sum up, the thread trimming device of the column type sewing machine of the present invention effectively solves the problem of long residual threads in sewing materials by optimizing the thread trimming structure and method, simplifies the process of products, saves labor, saves stitches, and reduces labor intensity.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. A thread trimmer of a column type sewing machine, characterized in that, the thread trimmer of the column type sewing machine comprises: a feed mechanism and a thread trimmer positioned at one side of the feed mechanism; The feeding mechanism includes: a lower feeding wheel, a transmission assembly, a transmission shaft, a helical gear, a feeding shaft and a one-way driver, the lower feeding wheel is connected to one end of the transmission shaft through the transmission assembly, and the transmission shaft The other end of the pump is connected to one end of the feeding shaft through the helical gear, and the other end of the feeding pump is connected to the one-way driver in a driving manner; The thread trimming mechanism includes: a movable knife seat, a secant movable knife, a hook movable knife, a wire clip, a wire clip bracket, a connecting rod assembly, a thread trimming cam, a rolling sleeve and a thread trimming electromagnet. Set opposite to the hook thread moving knife, both are installed on the moving knife seat and connected with the connecting rod assembly, the thread trimming cam is located on the roller sleeve, and the connecting rod assembly passes through the The thread-cutting cam and the rolling sleeve are connected with the thread-cutting electromagnet, and the thread clamp is positioned at one side of the hooking line moving knife, and is fixed by the line clamp bracket positioned on the moving knife seat. 2. The thread trimming device of a column sewing machine according to claim 1, wherein the transmission assembly comprises: a shaft coupling and a bearing sleeve, and the lower feed wheel is in transmission connection with the upper end of the shaft coupling, The lower end of the shaft coupling is connected with one end of the transmission shaft through the bearing sleeve. 3. The thread trimming device of the column sewing machine according to claim 2, wherein the coupling comprises: an upper part of the coupling and a lower part of the coupling, and the upper part of the coupling has a The upper protrusion matched with the wheel and the lower protrusion matched with the lower part of the shaft coupling, the upper protrusion is perpendicular to the lower protrusion. 4. The thread trimming device of a column sewing machine according to claim 1, wherein the secant moving knife comprises a first knife handle and a first cutting edge located at one end of the first knife handle, and the hook The thread-driven knife includes a second handle, a wire hook portion located at one end of the second handle, and a second cutting edge located at the front section, and the cutting edge of the second cutting edge is set toward the wire hook portion. 5 . The thread trimming device of a column sewing machine according to claim 4 , wherein arc-shaped grooves for accommodating the first knife handle and the second knife handle are provided on the movable knife seat. 5 . 6. The thread trimming device of a column-type sewing machine according to claim 1, wherein the connecting rod assembly comprises: a moving knife connecting rod, a connecting rod limiting plate, and a connecting rod, and one end of the moving knife connecting rod is The U-shaped end is connected with the secant moving knife and the hook line moving knife respectively, and the other end of the moving knife connecting rod is connected with one end of the connecting rod through the connecting rod limiting plate. 7. The thread trimming device of a column sewing machine according to claim 1, wherein the thread trimming mechanism further comprises a thread trimming electromagnet seat, and the thread trimming electromagnet is fixed on the thread trimming electromagnet seat . 8. The thread trimming device of the column type sewing machine according to claim 1, characterized in that, the thread trimming device of the column type sewing machine further comprises a column seat and a needle plate, and the needle plate is installed on the upper end of the column seat , the feeding mechanism and the thread trimming mechanism are partly accommodated in the space defined by the stand and the needle plate. 9 . The thread trimming device of a column sewing machine according to claim 8 , wherein an adjusting screw is installed on the bottom of the needle plate, and the adjusting screw presses against the upper arc surface of the secant moving knife. 10 . 10. The thread trimming device of the column type sewing machine according to claim 1, characterized in that, the thread trimming device of the column type sewing machine further comprises a lower shaft, and the thread trimming cam is mounted on the lower shaft.