KR101032967B1 - High-speed Rotary Shuttle Device - Google Patents

Abstract

The present invention relates to a device for supplying the lower thread of the sewing machine (various sewing machines including embroidery machine, industrial quilting machine, etc.), which is fixed to the lower part of the sewing machine main body, a circular outer peripheral surface 210 is formed and the central portion of one surface A first housing 220 is formed in the gear housing 200 in which a first hollow 230 penetrating the center of the first protrusion 220 is formed; It is generally a ring-shaped disk shape, rotatably inserted into the outer peripheral surface 210 of the gear housing 200, a plurality of power transmission pins 310 protruding at regular intervals along one surface of the ring disk Rotating plate 300 is arranged in a circular shape along; A gear 411 interlocked with the power transmission gear (a) of the sewing machine is coupled to one end thereof, and the other end thereof passes through the first hollow 230 of the gear housing 200; One end is coupled to the rotating plate 300 and the other end is connected to the other end of the shaft 410 passing through the first hollow 230 of the gear housing 200, 420; The second hollow 530 is formed of a support plate 510 and a second protrusion 520 formed at a central portion of one surface of the support plate 510, and coupled to the first protrusion 220 of the gear housing 200. An inclined guide plate 500 penetrating the support plate 510 and the second protrusion 520 while inclining upward toward the distal end of the second protrusion 520; It has a circular cap shape in which a portion is cut and a lower thread storage space 610 in which the lower thread bundle (b) is built is provided, and a hook 620 is provided on one side of the opening to hang the upper thread supplied in a ring shape. The bottom surface 630 has a hook body 600 in which a plurality of pin receiving devices 640 to which the power transmission pin 310 of the rotating plate 300 is engaged are arranged in a circular shape; An upper cover 700 covering an upper portion of the hook body 600; And a hook body fixing plate 800 coupled to the bottom surface 630 of the hook body 600 in a state installed between the gear housing 200 and the inclined guide plate 500. The bottom surface 630 of the hook body 600 is in close contact with the support plate 510 of the inclined guide plate 500, the power transmission pin 310 of the rotating plate 300 is the hook body 600 in the upper rotation section. Depart from the pin receiving device 640, in the lower rotating section is characterized in that the power transmission pin 310 of the rotating plate 300 is engaged with the pin receiving device 640 of the hook body (600).

Gear housing, rotating plate, shaft, connecting rod, inclined guide plate, hook body, hook body fixing plate, upper cover, separation prevention piece

Description

Sewing Machine Lower Thread Feeder {High-speed Rotary Shuttle Device}

The present invention relates to a device for supplying the lower thread of a sewing machine (various sewing machines including embroidery machine, industrial quilting machine, etc.), and provides a means for dramatically increasing the loading capacity of the lower thread as compared to the conventional, and to improve the work efficiency. will be.

In general, the sewing machine (various sewing machines including embroidery machine, industrial quilting machine, etc.), as shown in Figure 1, is provided with a rotary drum device 100 for supplying the lower thread. The rotary book device 100 is mounted to the drive shaft 10 is rotatably connected to the power unit (power transmission gear) of the sewing machine, a hook body (20) also referred to as a hook (Hook Body) 20, the hook body 20 Bobbin case (BC) that is accommodated in the), bobbin (Bobbin) 40 is wound up the lower thread is configured.

Bobbin case (BC) is accommodated in the hook body 20, the bobbin case base (Bobbin Case Base) 30 and also the bobbin case body (Bobbin Case Body) for storing the bobbin from the outside of the bobbin 40 It consists of 50.

The bottom of the bobbin case base 30 is provided with a stud 31, the bobbin 40 is rotatably installed on the stud 31.

The bobbin case (BC) consisting of the bobbin case base 30 and the bobbin case body 50 is integrally coupled, and the protrusions 75 of the hook holder 70 separately installed on the sewing machine body are provided on the bobbin case base 30. The bobbin case (BC) is fixed so that the flow is blocked because it is inserted into the groove 33 formed. In addition, a needle through hole 34 for penetrating when the needle descends adjacent to the groove 33 is formed.

The bobbin 40 has flanges 43 and 45 formed at both ends of the winding shaft 41 and the winding shaft 41 on which the lower thread is wound.

By this configuration, the hook holder 20 is prevented from being rotated along the hook body by the hook body 20 being affected by the rotation of the hook body 20 when the hook body 20 is driven, thereby maintaining a fixed state. The upper thread 3 which hooks the hook 21 of the hook body 20 and turns the bobbin case base 30 and the bobbin 40 to raise the lower thread 4 is the groove 33 of the bobbin case base (exactly the above It is guided through the recess 75 of the hook and the side wall of the groove in the groove (see Fig. 2).

Therefore, the groove 33 serves as a key groove into which the protrusion 75 of the kiln holder is inserted, while the width 33a is added to the width 75a of the protrusion so that the upper thread 3 is not interrupted. It is formed to a size to secure a gap.

Such a conventional rotary book device 100 has to stop the operation of the sewing machine and open the bobbin case body 50 and replace the bobbin 40 when the bobbin thread wound on the bobbin 40 is exhausted, one bobbin 40 It usually takes about 1 minute to replace.

Assuming that the bobbin thread wound on the bobbin 40 is 40 meters, the stitch length is 1 millimeter, and the reciprocating speed of the needle bar is 4000 RPM, in 10 minutes, the bobbin thread is exhausted and the sewing machine is stopped every 10 minutes and the bobbin 40 is replaced. It should be concluded that, in the case of a large sewing machine in which a plurality of needle rods (for example, 50 to 100) and the rotary drum device 100 are arranged in a row, the bobbin 40 may be wound. When the lower thread runs out, the operation of the sewing machine must be stopped and all of the bobbins 40 must be replaced.

Therefore, not to mention the work delay (disconnection) due to the replacement of the bobbin 40, some of the remaining bobbin thread remaining in the bobbin 40 is discarded so that the waste of raw materials can not be ignored.

If more bobbin thread can be wound on the bobbin 40, this problem can be solved considerably. The amount of the bobbin wound can only be limited by the external size of the bobbin 40. That is, in order to increase the loading amount of the lower thread, the diameter or width of the bobbin 40 may first be enlarged.

However, when the diameter or width of the bobbin 40 is enlarged, the following problems occur.

First, when the diameter or width of the bobbin 40 is enlarged, the size of the bobbin case (BC) for accommodating the same must be increased. As the size of the bobbin case (BC) increases, the bobbin case (BC) is wound around the bobbin case (BC). The supply length of the upper thread 3 which raises the lower thread 4 should also be long.

By the way, the supply length of the upper thread (3) depends on the stroke distance of the thousand crank bar, the size and structure of the thousand crank must also be changed.

That is, there is a problem that the overall sewing machine must be newly designed and manufactured, and if the feeding length of the upper thread increases, the number of times the upper thread reciprocates through the material up and down before forming a stitch (sweat) together with the lower thread increases due to frictional heat. Damage of the upper thread itself, of course, there is a problem that the stitch is not properly formed.

In order to eliminate such frictional heat, the reciprocating rotational speed of the needle bar may be reduced. However, when the rotational speed is reduced, the work efficiency is lowered, and the effectiveness of increasing the bobbin loading amount is lowered.

Therefore, there is an urgent need for a new concept of lower thread feeder that can maintain the reciprocating speed of the needle bar and the supply length of the upper thread 3 as it is, and increase the loading amount of the lower thread within a range that does not significantly change the existing sewing machine structure.

In order to solve the above-mentioned problems, the object of the present invention is as follows.

First, it is an object of the present invention to provide a means for significantly increasing the bobbin thread loaded once.

Secondly, another object of the present invention is to provide a means for increasing the loading amount of the lower thread while maintaining the supply length of the upper thread.

Third, another object of the present invention is to provide a lower thread supply device of a new structure that can utilize most of the existing sewing machine structure.

Technical composition of the present invention created to achieve the above object is as follows.

The present invention relates to a device for supplying the lower thread of the sewing machine, which is fixed to the lower part of the sewing machine main body, a circular outer circumferential surface 210 is formed and a first protrusion 220 is formed in the central portion of one surface, the first protrusion A gear housing 200 in which a first hollow 230 penetrating the center of the 220 is formed; It is generally a ring-shaped disk shape, rotatably inserted into the outer peripheral surface 210 of the gear housing 200, a plurality of power transmission pins 310 protruding at regular intervals along one surface of the ring disk Rotating plate 300 is arranged in a circular shape along; A gear 411 interlocked with the power transmission gear (a) of the sewing machine is coupled to one end thereof, and the other end thereof passes through the first hollow 230 of the gear housing 200; One end is coupled to the rotating plate 300 and the other end is connected to the other end of the shaft 410 passing through the first hollow 230 of the gear housing 200, 420; The second hollow 530 is formed of a support plate 510 and a second protrusion 520 formed at a central portion of one surface of the support plate 510, and coupled to the first protrusion 220 of the gear housing 200. An inclined guide plate 500 penetrating the support plate 510 and the second protrusion 520 while inclining upward toward the distal end of the second protrusion 520; It has a circular cap shape in which a portion is cut and a lower thread storage space 610 in which the lower thread bundle (b) is built is provided, and a hook 620 is provided on one side of the opening to hang the upper thread supplied in a ring shape. The bottom surface 630 has a hook body 600 in which a plurality of pin receiving devices 640 to which the power transmission pin 310 of the rotating plate 300 is engaged are arranged in a circular shape; An upper cover 700 covering an upper portion of the hook body 600; And a hook body fixing plate 800 coupled to the bottom surface 630 of the hook body 600 in a state installed between the gear housing 200 and the inclined guide plate 500. The bottom surface 630 of the hook body 600 is in close contact with the support plate 510 of the inclined guide plate 500, the power transmission pin 310 of the rotating plate 300 is the hook body 600 in the upper rotation section. Depart from the pin receiving device 640, in the lower rotating section is characterized in that the power transmission pin 310 of the rotating plate 300 is engaged with the pin receiving device 640 of the hook body (600).

Technical effects of the configuration of the present invention are as follows.

First, the present invention can significantly increase the bobbin thread loaded once.

In other words, even if the size of the hook body 600 on which the lower thread bundle b is loaded, the supply length of the upper thread 3 can be maintained as it is, so that the supply amount of the lower thread can be increased without causing a separate problem.

In a specific embodiment of the present invention, it was possible to increase approximately 20 times (about 2,000 meters of the length of the lower thread once loaded), and in this case, if the sewing machine was stopped and the lower thread replacement was performed every 10 minutes, in the case of the present invention By changing the bobbin thread every 200 minutes, productivity can be dramatically improved.

Second, the load of the lower thread can be increased while maintaining the supply length of the upper thread.

In other words, the upper thread to be supplied does not wrap the hook body 600 as a whole, but can almost maintain the first ring shape of the hook 620, thereby maintaining the supply length of the upper thread. That is, the reciprocating rotation speed of the sewing machine needle bar can be maintained as it is, and damage to the upper thread can be prevented, thereby significantly improving productivity.

Third, most of the existing sewing machine structure can be used as it is.

In other words, when replacing the conventional sewing machine rotary book device with the present invention, it is sufficient to modify only a part of the structure of the power transmission portion in the existing sewing machine structure.

Therefore, while making the most of the existing sewing machine can be significantly increased productivity, it is possible to minimize the cost to improve the productivity.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an exploded perspective view of the sewing machine lower thread supply apparatus of the present invention, Figure 4 shows a departure prevention piece 900 constituting the present invention, Figure 5 shows a rotating plate 300 constituting the present invention, Figure 6 Figure 7 shows the gear housing 200 constituting the present invention, Figure 7 shows the induction induction plate 500 constituting the present invention, Figure 8 shows the hook body 600 constituting the present invention, 9 shows a hook body fixing plate 800, and FIG. 10 shows a top cover 700 constituting the present invention.

The gear housing 200 is fixed to the lower part of the sewing machine body.

The gear housing 200 has a circular outer circumferential surface 210 formed thereon, and a first protrusion 220 is formed at the center of one surface thereof, and a gear 411 interlocked with the power transmission gear a of the sewing machine is formed at the other surface thereof. Is installed.

A first hollow 230 penetrating the center of the first protrusion 220 is formed to pass through the shaft 410 connected to the gear 411.

The rotating plate 300 has a ring-shaped disk as a whole.

Rotating plate 300 is rotatably inserted into the outer circumferential surface 210 of the gear housing 200, a plurality of power transmission pins 310 protruding at regular intervals along one surface is arranged in a circular shape along the annular disk, As shown in FIG. 5, one end of the connecting rod 420 is bolted or pin-coupled to the hole 311 in which the power transmission pin 310 is not inserted.

The departure preventing piece 900 is coupled to the outer circumferential surface 210 of the gear housing 200 that has passed through the rotating plate 300 to prevent the gear housing 200 from being separated from the rotating plate 300. It is not limited to that shown in Figure 4 can be changed in various forms that can maintain the coupled state of the gear housing 200 and the rotating plate (300).

That is, instead of enclosing the entire or substantial portion of the outer circumferential surface 210 of the gear housing 200, a small block may be simply bolted to the outer circumferential surface 210 to prevent separation and separation of the gear housing 200 and the rotating plate 300. There is, in this case, the block is a departure prevention piece (900).

The power transmission pin 310 meshes with the pin receiving device 640 of the hook body 600 to transmit a rotational force to the hook body 600.

One end of the shaft 410 is coupled to the gear 411 interlocking with the power transmission gear (a) of the sewing machine and the other end is protruded to the outside through the first hole 230 of the gear housing 200.

One end of the connecting rod 420 is coupled to the rotating plate 300 and the other end is coupled to the other end of the shaft 410 passing through the first hollow 230 of the gear housing 200.

Accordingly, when the shaft 410 rotates, the rotating plate 300 connected to the connecting rod 420 also rotates in association with each other.

The inclined guide plate 500 includes a support plate 510 and a second protrusion 520.

The support plate 510 is formed with a guide protrusion 511 protruding toward the hook body 600 along its edge, but is generally formed to protrude in an arc shape as shown in FIG. It is not limited to the pin shape of the plurality of gangs that are accommodated in the guide groove 631 provided on the bottom surface 630 of the hook body 600 to guide the rotation of the hook body 600 May be

The second protrusion 520 is formed at the central portion of one surface of the support plate 510.

The second hollow 530 passes through the support plate 510 and the second protrusion 520, and the second hollow 530 inclines upward toward the distal end of the second protrusion 520 as shown in FIG. 7. Is achieved.

The second hollow 530 is coupled to and fixed to the first protrusion 220 of the gear housing 200. The second hollow 530 forms an upward inclination θ of the second hollow 530, and thus the surface of one side of the gear housing 200. One surface of the and the support plate 510 is not parallel, but the distance between each other toward the upper side becomes farther and becomes inclined closer to the lower side.

Part of the upper section of the support plate 510 of the inclined guide plate 500 is preferably cut, and when a portion of the upper section of the support plate 510 is cut off, the interference with the upper thread 3 wound around the hook body 600 is prevented. It can prevent.

The hook body 600 has a circular cap shape in which a portion of the hook is cut out, and a lower thread storage space 610 in which the lower thread bundle b is embedded is provided.

There is no separate bobbin in the bobbin thread (b) to be loaded in the lower thread storage space (610).

Thus, as many bobbin threads can be loaded as possible in a given space.
The lower thread bundle (b) is wound in a gentle "∪" shape to match the inner circumferential surface of the lower thread storage space 610, as shown in Figure 14, such a lower thread bundle (b) to the lower thread storage space 610 When the hook body 600 is rotated after loading, the bobbin thread b is adhered to the inner circumferential surface of the lower thread storage space 610 by the centrifugal force of the rotating hook body 600 to maintain a stable loading state. Therefore, if the lower thread is to be released from the central portion of the lower thread bundle (b) can be supplied stably without bobbin bobbin.

One side of the opening cut out is provided with a hook 620 that hangs the upper thread supplied in a ring shape as shown in FIGS. 3 and 8.

On the bottom surface 630 of the hook body 600, a plurality of pin receiving devices 640 engaging with the power transmission pin 310 of the rotating plate 300 is arranged in a circular shape.

In addition, the bottom surface 630 of the hook body 600, the guide groove 631 for receiving the guide protrusion 511 is formed in an arc shape.

The hook body fixing plate 800 is coupled to the bottom surface 630 of the hook body 600 in a state installed between the gear housing 200 and the inclined induction plate 500, whereby the hook body 600 is inclined induction plate Maintaining a close state in close contact with the support plate 510 of the 500.

In addition, as shown in FIG. 12, the support plate 510 of the inclination guide plate 500 is inclined at a predetermined angle, and the hook body 600 is also inclined at a predetermined angle along the support plate 510.

Accordingly, in the upper rotation section, the power transmission pin 310 of the rotating plate 300 is separated from the pin receiving port 640 of the hook body 600, and in the lower rotation section, the power transmission pin 310 of the rotating plate 300 is the hook body. Engaged in the pin receiving device 640 of 600 to transmit power.

That is, when the gear 411 and the shaft 410 rotate, the rotating plate 300 connected by the connecting rod 420 rotates in linkage, and the power transmission pin 310 of the rotating plate 300 in the lower rotating section of the rotating plate 300. The hook body 600 is engaged with the pin receiving device 640 so that the hook body 600 also rotates with the rotating plate 300.

In the upper rotation section of the rotating plate 300, the power transmission pin 310 is separated from the pin receiving device 640 to open the space, the upper thread (3) wrapped around the hook body 600 through this space of the thousand crank As shown in FIG. 13, the ring shape may be continuously maintained as shown in FIG. 13, and the length of the upper thread 3 supplied to the hook body 600 may be minimized.

If this open space is not formed, the upper thread caught on the hook 620 in the form of a ring wraps around the hook body 600 in accordance with the rotation of the hook body 600, so that the supply length of the upper thread should be extended more than twice. .

The upper cover 700 serves to cover the upper portion of the hook body 600 in which the lower thread bundle b is accommodated, as shown in FIGS. 10 and 14.

The lower thread ejection cutting groove 710 is formed at one side of the upper cover 700 to serve as a passage through which the lower thread 4 released from the lower thread bundle b received inside the hook body 600 passes.

When the tension control plate 720 is made of an elastic material having an elastic force (for example, a spring plate), one side outer end of the lower thread ejection cutting groove 710 is provided with an elastic force to provide an appropriate tension to the lower thread ejected.

Although the technical spirit of the present invention has been described with reference to specific embodiments of the present invention as described above, the scope of protection of the present invention is not necessarily limited to these embodiments, and various designs may be made without changing the technical spirit of the present invention. Changes, additions or deletions of well-known technology, and simple numerical limitations also make it clear that they belong to the protection scope of the present invention.

1 is an exploded perspective view of a conventional sewing machine rotary book apparatus.

Figure 2 is a side view showing the operating state of a conventional sewing machine rotary book device of the prior art.

Figure 3 is an exploded perspective view of the sewing machine lower thread supply apparatus of the present invention.

4 shows a separation preventing piece 900 constituting the present invention.

5 shows a rotating plate 300 constituting the present invention.

6 shows a gear housing 200 that constitutes the present invention.

7 shows the induction plate 500 constituting the present invention.

8 illustrates a hook body 600 constituting the present invention.

9 shows a hook body retaining plate 800.

Fig. 10 shows a top cover 700 that constitutes the present invention.

Figure 11 shows a state in which the assembly of the sewing machine lower thread supply apparatus of the present invention is completed.

12 is a cross-sectional structure of the sewing machine lower thread supply device of the present invention.

Figure 13 shows the process of forming the stitch (stitch) by combining the upper thread and the lower thread in accordance with the rotation of the sewing machine lower thread supply device of the present invention, the upper thread is not the way to wrap the entire hook body 600, the first ring form Shows how to keep.

Figure 14 shows the process of installing the lower thread bundle (b) inside the hook body 600, the lower bobbin bundle (b) without a separate bobbin is loaded into the hook body 600 and the upper cover 700 is covered It is made in a manner, the coupling method of the upper cover 700 and the hook body 600 may be applied a variety of methods generally known, such as bolt coupling method, pin coupling method or male and female binding method.

<Description of the symbols for the main parts of the drawings>

a: power transmission gear b: bobbin thread

200: gear housing

210: outer peripheral surface

220: first protrusion

230: First Hollow

300: rotating plate

310: power transmission pin 311: hole

410: shaft 411: gear

420: connecting rod

500: slope induction plate

510: support plate

511: guide projection

520: the second protrusion

530; second hollow

600: Hook body

610: lower compartment storage space

620: Hook

630: bottom

631: Guide Home

640: pin receiving equipment

700: top cover

710: lower thread spout

720: tension control plate

800: hook body fixing plate

900: departure prevention piece

Claims (5)

As a device for supplying the lower thread of the sewing machine, It is fixed to the lower part of the sewing machine body, a circular outer circumferential surface 210 is formed, the first projection 220 is formed in the central portion of one surface, the first hollow 230 penetrating the center of the first projection 220 The formed gear housing 200; It is generally a ring-shaped disk shape, rotatably inserted into the outer peripheral surface 210 of the gear housing 200, a plurality of power transmission pins 310 protruding at regular intervals along one surface of the ring disk Rotating plate 300 is arranged in a circular shape along; A gear 411 interlocked with the power transmission gear (a) of the sewing machine is coupled to one end thereof, and the other end thereof passes through the first hollow 230 of the gear housing 200; One end is coupled to the rotating plate 300 and the other end is connected to the other end of the shaft 410 passing through the first hollow 230 of the gear housing 200, 420; The second hollow 530 is formed of a support plate 510 and a second protrusion 520 formed at a central portion of one surface of the support plate 510, and coupled to the first protrusion 220 of the gear housing 200. An inclined guide plate 500 penetrating the support plate 510 and the second protrusion 520 while inclining upward toward the distal end of the second protrusion 520; It has a circular cap shape cut in some areas, the inside is provided with a lower thread storage space 610 in which the lower thread bundle (b) is built, and the hook 620 to hang the upper thread supplied in the form of a ring on one side of the opening part. It is provided, the bottom surface 630, the hook body 600, the plurality of pin receiving devices 640 to which the power transmission pin 310 of the rotating plate 300 is engaged in a circular arrangement; An upper cover 700 covering an upper portion of the hook body 600; And, A hook body fixing plate 800 coupled to the bottom surface 630 of the hook body 600 in a state installed between the gear housing 200 and the inclined guide plate 500; Consists of including The bottom surface 630 of the hook body 600 is in close contact with the support plate 510 of the inclined guide plate 500, the power transmission pin 310 of the rotating plate 300 is the hook body 600 in the upper rotation section. Out of the pin receiving device 640, the lower rotation section of the power transmission pin 310 of the rotating plate 300 is supplied to the sewing machine bobbin thread, characterized in that the engagement with the pin receiving device 640 of the hook body 600 Device. In claim 1, A separation preventing piece 900 coupled to an outer circumferential surface 210 of the gear housing 200 passing through the rotating plate 300 to prevent the gear housing 200 from being separated from the rotating plate 300; Sewing machine lower thread supply device characterized in that it is further provided. In claim 1, It is formed on one side of the upper cover 700, the lower thread ejection cutting groove 710 through which the lower thread (4) released from the lower thread bundle (b) accommodated in the hook body 600 passes; And, A tension control plate 720 for providing tension to the lower thread ejected by pressing an outer end of the lower thread ejection groove 710 with an elastic force; Sewing machine lower thread supply device characterized in that it is further provided. In claim 1, Sewing machine lower thread supply device, characterized in that a portion of the upper section of the support plate 510 of the inclined guide plate 500 is cut. In claim 1, A guide protrusion 511 is formed to protrude toward the hook body 600 along the edge of the support plate 510 of the inclined guide plate 500, Sewing machine lower thread supply device, characterized in that the bottom surface 630 of the hook body 600, the guide groove 631 for receiving the guide protrusion 511 is formed in an arc shape.

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