TW201907069A - Automatic Bobbin Casing Replacement Device - Google Patents

Abstract

The present automatic bobbin casing replacement device is assembled to a rotary shuttle sewing machine, which comprises a replenishment mechanism and a replacement device. The replenishment mechanism includes a replaceable bobbin casing, and the replacement mechanism includes a movable frame which is capable of swing or movement and two gripper members. When the positions of the movable frame change, one of the gripper members moves the new bobbin casing from a replenishing position of the replenishment mechanism to a working position of the rotary shuttle. Meanwhile, another gripper member move the used bobbin casing from the working position to an ejection position far from the replenishing position. Thus, the new bobbin casing may shift toward the rotary shuttle simultaneously when the used bobbin casing was moved to the collective container, so that the processing time for replacing the bobbin casing may be shortened.

Description

Automatic change of bobbin device

The invention relates to a replacement bobbin device, which is mainly applied to a computer-controlled automatic sewing machine, in particular to a replacement bobbin device capable of shortening the time for replacing the bobbin case.

When using a sewing machine that is sewn by the sewing principle, the bobbin with the bobbin thread is wound, whether it is a full-turn rotary hook or a semi-rotary shuttle, and most of the sewing machines sewn by the sewing principle have a bobbin. Bobbin case.

However, because the capacity of the bobbin to accommodate the bottom thread is higher, the lower the speed that the sewing machine can reach, the lower the length of the bottom thread must be limited, so that the bottom line is used up to a certain frequency, and when replaced When the bottom line is working, not only the sewing machine must stop the sewing work, but even the sewing personnel must manually change the bottom line, which is relatively incapable of improving production efficiency.

In order to overcome the aforementioned drawbacks, the sewing machine industry has an automatic bobbin changing device 80. Referring to FIG. 1, the automatic bobbin changing device 80 is assembled to a base 811 of a sewing machine 81 and has a switching plate 82 and a clip. The claw 83 has a plurality of bobbin cases 84, and the jaws 83 are assembled by a driving device (not shown) to assemble one of the plurality of bobbin cases 84 to a hook of the base 811. 85.

As shown, in a specific application, when the driving device (not shown) is assembled to the hook 85 through one of the plurality of bobbins 84 through the jaws 83, the jaws 83 must first be The bobbin case 84 assembled to the hook 85 is removed, and one of the plurality of bobbin cases 84 is gripped, whereby the automatic bobbin changing device 80 can help the sewing person to change the bobbin, but the above automatic When the bobbin changing device 80 replaces the bobbin case 84, the above-mentioned jaws 83 must repeatedly move back and forth between the switching plate 82 and the hook 85, and the automatic bobbin changing device 80 must take a long time to replace the bobbin case. 84, relatively unable to improve production efficiency.

The main object of the present invention is that during the process of removing the bobbin case of the bottom line from the rotary hook to the exit position, the replacement bobbin case can be simultaneously moved from the replenishing position to the operating position, thereby effectively shortening the replacement of the bobbin case. Working time, which in turn increases productivity.

In order to achieve the foregoing object, the present invention relates to an automatic change bobbin device, wherein the automatic change bobbin device is assembled to a sewing machine, and is mainly composed of a supplement mechanism, a replacement mechanism, a positioning mechanism and a rotary drive mechanism, wherein The sewing machine has a hook, and the hook has a bobbin case capable of winding a bottom thread. Further, the above-mentioned automatic change bobbin device can be applied to a hook type sewing machine and a shuttle type sewing machine. Generally referred to as the hook.

The replenishing mechanism is located at one side of the hook and has at least one bobbin case for replacement, a switch plate for assembling the bobbin case for replacement, and a moving drive mechanism capable of driving the switch plate to move, when the mobile drive mechanism When the above-mentioned switching disk is linearly moved, the switching disk can be selectively approached or away from the rotating driving mechanism, and the replacing mechanism is located at one side of the replenishing mechanism, and has a moving frame, two jaw assemblies and two driving components. The moving frame can be changed in position through the two driving components, and the two jaw assemblies and the two driving components are all connected to the moving frame, wherein one of the two driving components is used to drive the moving frame to perform axial direction. Moving, when the moving frame is driven away from the hook by the driving component, one of the two jaw assemblies moves the replacement bobbin case from a replenishing position that can be separated from the switching plate to a distance away from The preparatory feed position of the replenishing position, and the other jaw assembly assembles the bobbin case of the depleted bottom line Said hook is moved to the operative position away from a preliminary assembly position to the operating position.

In addition, another driving assembly is configured to drive the moving frame to swing. When the moving frame is swung by the driving assembly at a center of rotation, one of the two clamping jaw assemblies prepares the replacement bobbin case from the foregoing The material position is driven to the preliminary assembly position, and the other jaw assembly drives the bobbin case that depletes the bottom line to move from the preliminary assembly position to a preliminary exit position.

Then, when the driving assembly for driving the moving frame axially moves the moving frame close to the hook, one of the two jaw assemblies moves the replacement bobbin case from the preliminary assembly position to the operating position. And the other jaw assembly drives the bobbin case that depletes the bottom line to move from the preliminary exit position to an exit position away from the replenishing position. In this embodiment, one of the two jaw assemblies and the rotation center A first distance is formed therebetween, and the other jaw assembly forms a second distance from the center of rotation that is the same as the first distance.

In a preferred embodiment, when the bobbin case that exhausts the bottom line is located at the exit position, the bobbin case that depletes the bottom line is located in a collecting groove, and the collecting groove is disposed on the other side of the hook. The replacement mechanism is located between the replenishing mechanism and the collecting tank. In another preferred embodiment, when the bobbin case that depletes the bottom line is located at the exit position, the moving frame drives the bottom line through one of the jaw assemblies. The bobbin case is moved back to the replenishing position by the exit position, and the bobbin case that has exhausted the bottom line is returned to the switch disk of the replenishing mechanism.

The positioning mechanism has a positioning component capable of preventing the switching disk from rotating freely, wherein the positioning component is telescopically movable, so that the positioning component can be moved by a positioning position for preventing the switching disk from rotating to a rotation of the switching disk. Release the position. In this embodiment, the positioning assembly has a steel ball that is engaged with the switching disk and a pushing spring that can hold the steel ball in the positioning position.

The rotary drive mechanism has a reciprocating telescopic rod. When the telescopic rod reciprocates between a retracted position and an extended position, the rotary drive mechanism can drive the switch disc to rotate in a single direction, so that the bobbin case Moving into the replenishing position, the switching disc is pushed against the positioning component, and the positioning component is moved from the positioning position to the releasing position.

The invention is characterized in that the two jaw assemblies are mounted on the movable position of the changeable position, and when the moving frame changes position, one of the two jaw assemblies can move the replacement bobbin case into the hook while the other jaw assembly The bobbin case that has exhausted the bottom line is moved into the collecting tank, thereby shortening the working time for replacing the bobbin case, thereby improving production efficiency.

In order to further clarify and understand the structure, the use and the features of the present invention, the preferred embodiment is described in detail with reference to the following drawings:

Referring to FIG. 2, in the first preferred embodiment, the automatic change bobbin device 1 of the present invention is assembled to a base 10 of a sewing machine (not shown) (the figure only shows a partial state of the base), and the base is The inside of the base 10 has a horizontally disposed lower shaft (not shown), and the lower shaft can drive a rotary hook 11 inside the base 10 to rotate. The base 10 has a table top (not shown). And connecting a first fixing frame 12 and a second fixing frame 13.

Referring to FIG. 2 and FIG. 3 , the automatic change bobbin device 1 is mainly composed of a supplement mechanism 20 , a replacement mechanism 30 , a positioning mechanism 40 , a rotation drive mechanism 50 , a storage mechanism 60 and an induction mechanism 70 . composition.

Referring to FIG. 3 and FIG. 4, the replenishing mechanism 20 is located at one side of the hook 11 and has a moving drive mechanism 21 and a switchable disk 22 that can be rotated. The mobile drive mechanism 21 is configured. There are two fixed fixed seats 211 and a movable movable seat 212, wherein one of the two fixed seats 211 is spaced apart from the other, and the two fixed seats 211 are fixed to the first fixed frame. The movable base 212 has a moving block 212a between the two fixing bases 211 and a connecting bracket 212b fixedly connected to the moving block 212a. The connecting bracket 212b has a pivoting rod 212c. The switching plate 22 is pivotally connected to the pivoting rod 212c and has a positioning plate 221, and the switching plate 22 is provided with six circumferentially equidistantly arranged bobbin case 222 on the surface of the positioning plate 221, each of the above A bobbin case 222 is used to assemble a replacement bobbin case 223 having a bottom line. As shown, the back side of the positioning plate 221 has six annular equidistantly arranged studs 224 and six on the outer peripheral side. 225 from the positioning groove.

Referring to FIG. 3 and FIG. 5, the replacing mechanism 30 is located in front of the hook 11 and has a first driving component 31, a moving frame 32, a first jaw assembly 33, and a second jaw assembly. And a second driving component 35, wherein the first driving component 31 is configured to drive the moving frame 32 to move axially, and has a first operating rod 311 disposed on the second fixing frame 13 and assembled in the first a first driving source 312 of the actuating lever 311, and the moving frame 32 has a first connecting end 321 and a second connecting end 322 remote from the first connecting end 321 , the first connecting end 321 and the second connecting end A sleeve 323 is connected between the end 322 and the second driving assembly 35. The end of the moving frame 32 away from the second fixing frame 13 is provided with an axial movement corresponding to the first operating rod 311. Fixing member 324.

The first jaw assembly 33 has a first jaw connecting seat 331 fixedly coupled to the first connecting end 321 , and the first jaw connecting seat 331 is assembled with a fixed first fixing jaw 332 and is away from The first fixed jaw 332 is provided with a first pivoting portion 333. The first pivoting portion 333 is pivotally connected to a swingable first movable jaw 334, and the first movable jaw 334 has a first a clamping portion 334a and a first jaw driver 335 coupled to the moving frame 32 at an end remote from the first clamping portion 334a, wherein the first jaw driver 335 can drive the first movable jaw 334 The swinging back and forth makes the first clamping portion 334a selectively accessible or away from the first fixing jaw 332.

The second jaw assembly 34 is coupled to the second connecting end 322 of the moving frame 32, and is mainly composed of a second jaw connecting seat 341 having the same structure as the first jaw connecting seat 331. a second fixed jaw 342 identical to the first fixed jaw 332, a second movable jaw 343 having the same configuration as the first movable jaw 334, and a structural aspect identical to the first jaw driver described above The second jaw driver 344 of the 335, and the second jaw connecting seat 341, the second fixing jaw 342, the second movable jaw 343, and the second jaw driver 344 are connected to each other in the same manner. The first jaw assembly 33 is thus omitted from the structural description of the second jaw assembly 34. However, the first jaw assembly 33 has the same structural composition as the second jaw assembly 34. That is, the first jaw assembly 33 may have a different structural composition than the second jaw assembly 34 described above.

The second driving component 35 is configured to drive the moving frame 32 to swing. As shown, the second driving component 35 has a second driving source 351 fixed to the second fixing frame 13, and the second driving source 351. The sleeve 323 of the moving frame 32 is coupled to the second actuating lever 352.

Referring to FIG. 3 and FIG. 6 , the positioning mechanism 40 is connected to the connecting frame 212 b of the replenishing mechanism 20 , and has a limiting connecting seat 41 fixed to the connecting frame 212 b and a positioning component 42 capable of telescopic movement. The limiting connector 41 and the positioning component 42 are assembled to each other. As shown, the limiting connector 41 has an assembly space 411, and the positioning component 42 has a pushing spring 421 located inside the assembly space 411 and a The steel ball 422 is located on the side of the urging spring 421, and the urging spring 421 can move the steel ball 422 toward the outer circumferential side of the positioning disk 221 .

Referring to FIG. 3 and FIG. 7 , the rotary drive mechanism 50 is located behind the switch disk 22 and has a rotary drive source 51 and a telescopic rod 52. The rotary drive source 51 is assembled to the first through a connecting plate 53. a fixing frame 12, wherein the telescopic rod 52 is connected to a resilient piece 54 and is movable through the rotary driving source 51 to the protrusion 224 of the switching disk 22, so that when the elastic piece 54 touches the protruding post 224, the above The switching disk 22 is rotated about the pivot lever 212c.

Referring to FIGS. 3 and 8 , the storage mechanism 60 is remote from the replenishing mechanism 20 , and the replacement mechanism 30 is located between the replenishing mechanism 20 and the storage mechanism 60 . The storage mechanism 60 is connected to the second fixing. The frame 13 has a collecting groove 61 and a translation driving assembly 62. The translation driving unit 62 has a translation driving source 621. The translation driving source 621 can drive a sliding plate 622 to move close to the bottom surface of the collecting groove 61.

Referring to FIG. 3 again, the sensing mechanism 70 has a first inductor 71 and a second inductor 72. The first inductor 71 is connected to the connecting plate 53 of the rotating driving mechanism 50, and the second inductor is 72 is coupled to the second holder 13 described above.

Referring to FIG. 9A and FIG. 9B, in the specific application, each of the bobbin case 222 is assembled with the replacement bobbin case 223, and then the moving seat 212 of the moving drive mechanism 21 is adjacent to the rotary drive mechanism 50. One of the six protrusions 224 is located on the moving path of the elastic piece 54. However, the pushing spring 421 of the positioning component 42 drives the steel ball 422 of the positioning component 42 to a positioning position A1. The steel ball 422 is abutted against the positioning groove 225 of the positioning plate 221 to prevent the switching disk 22 from rotating freely.

Referring to FIG. 9C and FIG. 9D, when the switching disk 22 of the replenishing mechanism 20 is close to the rotating driving mechanism 50, the second driving source 351 of the replacing mechanism 30 drives the second operating lever 352 to make the replacing mechanism. The moving frame 32 of the 30 is counterclockwise oscillated with a center of rotation S such that the first jaw assembly 33 is located on the front side of one of the six replacement bobbins 223 while the second jaw assembly 34 is located at the hook The front side of the first jaw assembly 33 forms a first distance L1 with the rotation center S, and the second jaw assembly 34 forms a second distance L2 with the rotation center S. The distance between the first distance L1 and the second distance L2 is the same.

Then, the first driving source 312 of the first driving component 31 drives the first operating lever 311 to move, so that the first operating lever 311 drives the moving frame 32 to gradually approach the hook 11 via the fixing member 324.

Referring to FIG. 9E and FIG. 9F, when the moving frame 32 of the replacing mechanism 30 is close to the hook 11 , the first jaw driver 335 drives the first movable jaw 334 to swing, so that the first activity is performed. The first clamping portion 334a of the clamping jaw 334 swings close to the second fixing clamping jaw 342, whereby the first movable clamping jaw 334 and the first fixing clamping jaw 332 are clamped together on the replacement bobbin case 223, and at the same time The second jaw driver 344 drives the second clamping portion 343a of the second movable jaw 343 to swing closer to the second fixing jaw 342, so that the second movable jaw 343 and the second fixed jaw 342 are both A depletion bobbin case 14 assembled to the hook 11 is co-clamped, wherein the bottom line of the depletion bobbin case 14 is nearly exhausted.

Referring to FIG. 9G and FIG. 9H, when the first jaw assembly 33 and the second jaw assembly 34 are respectively clamped to the replacement bobbin case 223 and the depletion bobbin case 14, the first driving assembly 31 is The first driving source 312 drives the first actuating lever 311 so that the moving frame 32 is away from the hook 11 , so that the first jaw assembly 33 drives the replacement bobbin case 223 to be separated from the switch disk 22 . The replenishing position B1 (shown in FIG. 9D) is moved to a preliminary feeding position B2 away from the replenishing position B1, and the second gripper assembly 34 drives the depleting bobbin 14 to be assembled by the bobbin 11 The operating position B3 (shown in FIG. 9D) is moved to a preliminary assembly position B4 away from the operating position B3, so that the first jaw assembly 33 can separate the replacement bobbin case 223 from the bobbin case 222. The second jaw assembly 34 can separate the depletion bobbin case 14 from the hook 11 . At this time, the first sensor 71 of the sensing mechanism 70 senses that the replacement bobbin case 223 has been removed from the switch disk 22 . Move out and display OFF, whereby the control system can determine Alternatively bobbin case 223 has been removed from the switching disc 22.

Then, the moving frame 32 of the replacing mechanism 30 is oscillated clockwise by the rotation center S through the second driving unit 35, so that the first jaw assembly 33 is located at the front side of the hook 11 to further the first jaw. The assembly 33 drives the replacement bobbin case 223 to swing from the preliminary feeding position B2 to the preliminary assembly position B4, and the second jaw assembly 34 swings the depletion bobbin case 14 from the preliminary assembly position B4 to a distance away from the above. Preparing the preliminary exit position B5 of the feed position B2. At this time, the second jaw assembly 34 is adjacent to the second inductor 72 of the sensing mechanism 70, thereby causing the second inductor 72 to sense the depletion bobbin case 14. The display is turned ON at the above-described exit position B5, whereby the control system can determine that the depletion bobbin case 14 has been taken out from the hook 11.

Referring to FIG. 9I, the first driving source 312 of the first driving component 31 retracts the first actuating lever 311 of the first driving component 31 to bring the moving frame 32 close to the hook 11 to make the above The first jaw assembly 33 moves the replacement bobbin case 223 to the operating position B3, thereby assembling the replacement bobbin case 223 to the hook shuttle 11, and the second jaw assembly 34 drives the depletion bobbin case 14 The preliminary exit position B5 is moved to an exit position B6 above the collection slot 61. Subsequently, referring to FIGS. 9J and 9K, the first jaw driver 335 of the first jaw assembly 33 drives the first The first clamping portion 334a of the movable jaw 334 is away from the replacement bobbin case 223, so that the replacement bobbin case 223 is indeed assembled to the hook 21, and the second jaw driver 344 of the second jaw assembly 34 drives the above-mentioned The second clamping portion 343a of the two movable jaws 343 is away from the depletion bobbin case 14 to drop the depletion bobbin case 14 into the collection groove 61 of the storage mechanism 60, and, as shown in FIG. 9L, Avoid the above exhaustion of the bobbin case 14 before it is dropped To the inner collecting trough 61 is exhausted bobbin case stopper 14, translatable drive source 621 of the storage means 60 carried by said pusher plate 622 clear the capture region of the groove 61 corresponding to the depletion of the bobbin case 14 falls.

Then, the first driving component 31 drives the moving frame 32 away from the hook 11 . At this time, the first jaw assembly 33 and the second jaw assembly 34 respectively do not clamp the replacement bobbin case 223 and The bobbin case 14 is depleted, and then the moving frame 32 of the replacing mechanism 30 is further rotated counterclockwise by the rotation center S through the second driving unit 35, so that the first jaw assembly 33 is positioned in the remaining replacement bobbin case 223. One of the front sides, and the second jaw assembly 34 is located on the front side of the hook 11, at which time the first jaw assembly 33 and the second jaw assembly 34 are respectively located in the preliminary feeding position B2 and ready for assembly. Position B4, in turn, causes both the first jaw assembly 33 and the second jaw assembly 34 to wait for the next gripping of the bobbin case.

Referring to FIG. 10A and FIG. 10B, when the action of replacing the bobbin case 14 is completed, the rotary drive source 51 of the rotary drive mechanism 50 drives the telescopic rod 52 to extend upward, so that the telescopic rod 52 is on the elastic piece 54. The retracted position C1 contacting the above-mentioned stud 224 is moved to an extended position C2 away from the retracted position C1, and the above-mentioned elastic piece 52 is moved from the retracted position C1 to the extended position C2, and the elastic piece 54 is continued. In response to the protrusion 224, the positioning plate 221 is rotated, and the switching plate 22 is rotated by 60 degrees with the pivoting rod 212c as an axis, wherein during the rotation of the switching disk 22, the above The steel ball 422 of the positioning assembly 42 is pressed by the switching plate 22 to move from the positioning position A1 to a release position A2, so that the steel ball 422 is disengaged from the positioning groove 225 of the positioning plate 221, and the telescopic rod 52 is removed. When the position of the extended position C2 is located, the pushing spring 421 pushes against the steel ball 422, so that the steel ball 422 falls into the next positioning groove 225, and finally, when the telescopic rod 52 is C2 is moved to the extended position in the contracting position C1, the above-described elastic piece 54 touches the next one of said contravention boss 224, so that the leaf spring 54 will be deformed, and thus does not promote the reverse rotation of the positioning plate 221.

When the rotation driving mechanism 50 completes the operation, one of the remaining replacement bobbins 223 moves into the replenishing position B1, so that the first sensor 71 of the sensing mechanism 70 senses the next replacement bobbin case 223.

Referring to FIG. 11, in the second preferred embodiment, the difference from the first preferred embodiment is that the automatic change bobbin device 1 does not have the storage mechanism 60. Therefore, in this embodiment, the automatic change shuttle is The core device 1 is mainly composed of the above-mentioned replenishing mechanism 20, the replacing mechanism 30, the positioning mechanism 40, the rotation driving mechanism 50, and the sensing mechanism 70, wherein the replenishing mechanism 20, the replacing mechanism 30, the positioning mechanism 40, the rotation driving mechanism 50, and the sensing The structure of the mechanism 70 is the same as that of the first preferred embodiment, and will not be further described in this embodiment.

Referring to FIG. 12A, in the specific application, when the replacement bobbin case 223 is in the operating position B3, the first jaw assembly 33 is disengaged from the replacement bobbin case 223, so that the replacement bobbin case 223 is actually assembled. The shuttle 11 is then moved away from the hook 11 through the first drive assembly 31, so that the second jaw assembly 34 drives the depletion bobbin 14 to move from the exit position B6 to the preparatory exit. At position B5, at this time, the first jaw assembly 33 does not grip the replacement bobbin case 223.

Referring to FIG. 12B and FIG. 12C, the second driving unit 35 drives the moving frame 32 to swing counterclockwise at the rotation center S, so that the second jaw assembly 34 drives the depletion bobbin 14 to exit. The position B5 is moved to the preliminary feeding position B2, and the first driving unit 31 drives the moving frame 32 to approach the hook 11 to move the depletion bobbin 14 from the preliminary feeding position B2 to the supplementary position. B1, and when the depletion bobbin case 14 is located at the replenishing position B1, the second jaw assembly 34 is disengaged from the depletion bobbin case 14, so that the depletion bobbin case 14 is indeed assembled to the shuttle of the switchboard 22 The shell connecting frame 222, after which the first driving assembly 31 drives the moving frame 32 away from the hook 11 so that the first jaw assembly 33 and the second jaw assembly 34 do not grip any bobbin case. In the case of waiting for the next bobbin case.

The above embodiments are intended to be illustrative only, and are not intended to limit the scope of the present invention. It is included in the scope of the following patent application.

1‧‧‧Automatically changing bobbin unit

10‧‧‧Base

11‧‧ ‧ hook

12‧‧‧First mount

13‧‧‧Second holder

14‧‧‧Depleted bobbin case

20‧‧‧Supplementary institutions

21‧‧‧Mobile drive mechanism

211‧‧‧ fixed seat

212‧‧‧Mobile seat

212a‧‧‧moving block

212b‧‧‧Connecting frame

212c‧‧‧ pivot rod

22‧‧‧Switching disk

221‧‧‧ Positioning plate

222‧‧‧ bobbin case

223‧‧‧Replacement bobbin case

224‧‧‧Bump

225‧‧‧ positioning slot

30‧‧‧Replacement agency

31‧‧‧First drive assembly

311‧‧‧First actuating rod

312‧‧‧First drive source

32‧‧‧Mobile rack

321‧‧‧First connection

322‧‧‧second connection

323‧‧‧ casing

324‧‧‧Fixed parts

33‧‧‧First jaw assembly

331‧‧‧First jaw connection

332‧‧‧First fixed jaw

333‧‧‧First pivotal

334‧‧‧First activity jaw

334a‧‧‧First clip

335‧‧‧First jaw driver

34‧‧‧Second jaw assembly

341‧‧‧Second jaw connector

342‧‧‧Second fixed jaw

343‧‧‧Second activity jaw

343a‧‧‧Second clip

344‧‧‧Second jaw driver

35‧‧‧Second drive assembly

351‧‧‧second drive source

352‧‧‧Second actuating rod

40‧‧‧ Positioning agency

41‧‧‧Restricted connection

411‧‧‧Assembly space

42‧‧‧ Positioning components

421‧‧‧ Push against spring

422‧‧‧ steel ball

50‧‧‧Rotary drive mechanism

51‧‧‧Rotary drive source

52‧‧‧ Telescopic rod

53‧‧‧Connecting plate

54‧‧‧Shrap

60‧‧‧ accommodating institutions

61‧‧‧ collection trough

62‧‧‧Translating drive components

621‧‧‧ translation drive source

622‧‧‧Change board

70‧‧‧Induction agency

71‧‧‧First sensor

72‧‧‧Second sensor

80‧‧‧Automatic bobbin changing device

81‧‧‧Sewing machine

811‧‧‧Base

82‧‧‧Switching disk

83‧‧‧claw

84‧‧‧ bobbin case

85‧‧ ‧ hook

A1‧‧‧Location

A2‧‧‧ release position

B1‧‧‧Additional location

B2‧‧‧Prepared feeding position

B3‧‧‧Operation position

B4‧‧‧Prepared assembly position

B5‧‧‧Prepared exit position

B6‧‧‧ Exit location

C1‧‧‧Retracted position

C2‧‧‧Extended position

L1‧‧‧ first distance

L2‧‧‧Second distance

S‧‧‧ Rotation Center

1 is a schematic view of a conventional automatic bobbin changing device; FIG. 2 is a perspective view of a first preferred embodiment of the automatic bobbin device of the present invention; FIG. 3 is an exploded view of the first preferred embodiment of the automatic bobbin device of the present invention; Figure 4 is an exploded view of the refill mechanism of the present invention; Figure 5 is an exploded view of the repositioning mechanism of the present invention; Figure 6 is an exploded view of the positioning mechanism of the present invention; Figure 7 is a schematic view of the rotary drive mechanism of the present invention; FIG. 9A is a schematic diagram of the horizontal movement of the switch disk; FIG. 9B is a schematic view of the positioning component located at the positioning position; FIG. 9C is a schematic view of the moving frame performing the counterclockwise swing; FIG. 9D is a schematic view of the moving frame close to the rotary hook Figure 9E is a schematic view of the first jaw assembly gripping the replacement bobbin case; Figure 9F is a schematic view of the second jaw assembly gripping the exhaust bobbin case; Figure 9G is a schematic view of the moving frame away from the hook; Figure 9H is a schematic view; FIG. 9I is a schematic view of the moving frame being closer to the hook; FIG. 9J is a schematic view of the first jaw assembly releasing the replacement bobbin case; FIG. 9K is a second jaw assembly. FIG. 9L is a schematic diagram of the translation drive assembly pushing the depletion bobbin case; FIG. 10A and FIG. 10B are schematic diagrams showing the rotation drive mechanism driving the switch disc to rotate; FIG. 11 is the automatic replacement bobbin device of the present invention. 2 is a schematic view of the moving frame again away from the hook; FIG. 12B is a schematic view of the depletion bobbin moving from the preliminary exit position to the preliminary feeding position; and FIG. 12C is the depletion bobbin case Put back the schematic diagram of the switchboard.

Claims (8)

An automatic change bobbin device for use with a rotary hook includes: a replenishing mechanism located on one side of the hook and having at least one bobbin case for replacement, and the bobbin case for replacement is capable of being separated from a replenishing position of the replenishing mechanism; and a replacing mechanism on a side of the replenishing mechanism, and having a movable position of the shiftable position and two jaw assemblies assembled to the moving frame, when the moving frame changes position One of the two jaw assemblies moves the shuttle bobbin for replacement from the replenishing position to an operating position of the bobbin, and the other jaw assembly moves the bobbin case that depletes the bobbin thread from the operating position to An exit position away from the above supplementary position. The automatic change bobbin device according to claim 1, wherein the moving frame assembles two driving components, and one of the two driving components drives the moving frame away from the hook, so that the two jaw assemblies are Moving the bobbin case for replacement to a preliminary feeding position away from the replenishing position, and the other jaw assembly moving the bobbin case depleting the bobbin thread to a preliminary assembly position away from the operating position, and a driving assembly drives the moving frame to swing at a center of rotation, so that one of the two jaw assemblies drives the replacement bobbin case from the preliminary feeding position to the preliminary assembly position, and the other jaw assembly drives the above The bobbin case that has exhausted the bottom line is moved from the above-mentioned preliminary assembly position to a preliminary exit position on the side of the above-mentioned exit position. The bobbin device is automatically replaced as described in claim 2, wherein one of the two jaw assemblies forms a first distance from the center of rotation, and the other jaw assembly forms a distance from the center of rotation The second distance is the same as the first distance described above. The bobbin device is automatically replaced as described in claim 1, wherein the other side of the hook is located in a collecting groove near the exit position, so that the bobbin case that depletes the bottom line is located at the exit position, and the bottom line is exhausted. The bobbin case can be positioned in a collecting trough, and the collecting trough is disposed on the other side of the hook, so that the replacing mechanism is located between the replenishing mechanism and the collecting trough. The bobbin device is automatically replaced as described in claim 1, wherein when the bobbin case that depletes the bottom line is located at the exit position, the moving frame drives the bobbin case that depletes the bottom line via one of the jaw assemblies. The exit position is moved back to the above supplementary position, and the bobbin case that has exhausted the bottom line is returned to the above-mentioned replenishing mechanism. The automatic replacement of the bobbin device according to the first aspect of the invention, wherein the replenishing mechanism has a switching disc for assembling the bobbin case, the switching disc is used with a positioning mechanism, and the positioning mechanism has a telescopic The moving positioning component enables the positioning component to be moved by a positioning position that prevents the switching disk from freely rotating to a release position in which the switching disk is rotated. The automatic change bobbin device according to claim 6, wherein the automatic change bobbin device further has a rotation driving mechanism, and the rotation driving mechanism can drive the switching plate to rotate, so that the switching plate is pushed to the above Positioning the assembly to move the positioning assembly from the positioning position to the release position. The automatic change bobbin device according to claim 7, wherein the replenishing mechanism further has a moving drive mechanism, wherein the moving drive mechanism can drive the switch disc to perform linear movement, so that the switch disc can be selectively approached or far away. In the above rotary drive mechanism.