CN210506737U - Flat seaming machine and thread trimming and loosening mechanism thereof - Google Patents
Flat seaming machine and thread trimming and loosening mechanism thereof Download PDFInfo
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- CN210506737U CN210506737U CN201921356544.6U CN201921356544U CN210506737U CN 210506737 U CN210506737 U CN 210506737U CN 201921356544 U CN201921356544 U CN 201921356544U CN 210506737 U CN210506737 U CN 210506737U
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Abstract
The utility model relates to a flat seaming machine and a thread trimming and loosening mechanism thereof.A movable cutter is driven by a driving mechanism to reciprocate back and forth, moves forward to hook the thread and then moves backward to press the thread on a fixed cutter for cutting off; when the thread releasing piece follow-up knife moves forwards, the thread is shifted forwards to tension the thread, and the tensioned thread pulls the thread picking arm of the thread picking torsion spring to make the thread picking arm twist backwards to tighten the torsion spring; when the thread releasing piece moves backwards along with the movable knife, the tensioned suture has the tendency of restoring the slack, and the thread is pulled by the thread picking arm swinging forwards under the action of the torsion spring, so that the suture cannot be maintained at a certain position due to too much slack and the movable knife cannot catch the suture. Therefore, the utility model discloses a trimming pine line mechanism can improve the stability of suture position to improve trimming stability.
Description
Technical Field
The utility model relates to a flat seaming machine and trimming thread loosening mechanism thereof.
Background
At present, a lower thread trimming and loosening mechanism of a flat seaming machine is mostly thread loosening pieces for loosening threads, common thread loosening pieces are simple sheet metal parts, the thread loosening amount of the common thread loosening pieces cannot be well matched with the thread demand when a thread trimming knife resets, especially when the thread trimming knife starts to clamp and trim threads, the thread loosening amount is often more than 2 times of the thread demand, as shown in fig. 1, if the threads are in a loose state, a thread rail of the threads cannot be ensured at a stable position, the threads are hooked by a movable knife at the moment, the threads cannot be hooked by 100% for trimming, and the thread trimming is unstable.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, an object of the present invention is to provide a flat seaming machine and a thread trimming and loosening mechanism thereof, which can improve the thread trimming stability.
In order to achieve the above object, the utility model provides a trimming thread loosening mechanism adopts following technical scheme: a thread cutting and loosening mechanism comprises a curved needle, a movable cutter and a fixed cutter, wherein the curved needle is provided with a needle hole for penetrating a thread, one end of the movable cutter is provided with a thread hooking port, and the other end of the movable cutter is connected with a thread loosening blade;
the thread releasing piece is connected with a thread take-up torsion spring which is provided with a thread take-up arm extending out, and a first thread through hole is formed in the thread take-up arm, and a thread passes through a needle hole of the curved needle and passes through the first thread through hole;
the movable knife is driven by the driving mechanism to reciprocate, moves forwards to hook the suture and then moves backwards to press the suture on the fixed knife for cutting off;
when the thread releasing piece follow-up knife moves forwards, the thread pulls the thread take-up arm of the thread take-up torsion spring to enable the thread take-up arm to swing backwards; when the thread releasing piece moves backwards along with the follow-up knife, the thread picking arm twists forwards to pull the thread.
Preferably, the fixed knife is close to the upper side surface of the movable knife, a thread clamping piece is arranged below the movable knife, and the thread clamping piece is close to the lower side surface of the movable knife.
Preferably, the rear side of the thread loosening piece is provided with a first thread passing piece, the front side of the thread loosening piece is provided with a second thread passing piece, the first thread passing piece and the second thread passing piece are respectively provided with a second thread passing hole and a third thread passing hole, and the thread passes through the second thread passing hole, the first thread passing hole and the third thread passing hole in sequence.
Preferably, the curved needle is provided with a thread passing channel extending forwards and backwards, and the suture passes through the thread passing channel and passes through the needle hole.
More preferably, the curved needle is provided with a thread inlet hole, and the suture enters the thread passing channel from the thread inlet hole.
Preferably, the thread releasing piece comprises a first connecting part and a second connecting part which are perpendicular to each other, the first connecting part is connected to the movable knife, and the second connecting part is provided with a thread passing waist hole for a thread to pass through.
More preferably, the lower-end waist hole extends in the front-rear direction.
More preferably, be equipped with first spliced pole on the first connecting portion, be equipped with the second spliced pole on the second connecting portion, the take-up torsional spring cover is on the second spliced pole, the take-up torsional spring still has the linking arm, the linking arm is fixed on first spliced pole.
And with the utility model discloses a thread trimming pine line mechanism correspondingly, the utility model discloses still provide a flat seaming machine, including above-mentioned technical scheme or its arbitrary preferred technical scheme thread trimming pine line mechanism.
As mentioned above, the utility model relates to a flat seaming machine and trimming thread loosening mechanism thereof has following beneficial effect: when the thread trimming and loosening mechanism of the utility model is used for trimming threads, the movable knife is driven by the driving mechanism to reciprocate back and forth, the movable knife moves forwards to hook the thread and then moves backwards to press the thread on the fixed knife to cut off the thread; when the thread releasing piece moves forwards along with the movable knife, the thread releasing piece picks up the thread to tension the thread, and the tensioned thread pulls the thread picking arm of the thread picking torsion spring to make the thread picking arm twist backwards to tighten the torsion spring; when the thread releasing piece moves backwards along with the movable knife, the tensioned suture has the tendency of restoring the slack, and the thread is pulled by the thread picking arm swinging forwards under the action of the torsion spring, so that the suture cannot be maintained at a certain position due to too much slack and the movable knife cannot catch the suture. Therefore, the utility model discloses a trimming pine line mechanism can improve the stability of suture position to improve trimming stability.
Drawings
Fig. 1 is a schematic structural view of a thread cutting and releasing mechanism without a thread take-up torsion spring.
Fig. 2 is a schematic structural view of the thread trimming and loosening mechanism of the present invention, wherein the movable knife is in a thread-unhooking state.
Fig. 3 is a schematic structural view of the thread trimming and loosening mechanism of the present invention, wherein the movable knife is in a state of hooking the thread.
Fig. 4 is a schematic structural diagram of a thread cutting and loosening mechanism of the present invention, in which the movable knife is in a state of hooking the thread and being pulled close to the stationary knife.
FIG. 5 is a schematic view showing the connection between the thread releasing piece and the thread take-up torsion spring, the torsion spring being in a relaxed state.
FIG. 6 is a schematic view showing the connection between the thread releasing piece and the thread take-up torsion spring, the torsion spring being in a twisted state.
Description of the element reference numerals
1 curved needle
2 moving knife
3 fixed knife
4 stitch
5 pinhole
6 collude line mouth
7 loose thread piece
8 take-up torsion spring
9 take-up arm
10 first wire through hole
11 wire clamping sheet
12 first wire passing sheet
13 second wire-passing piece
14 second wire through hole
15 third wire through hole
16 wire-passing channel
17 wire inlet hole
18 first connection part
19 second connecting part
20 line passing waist hole
21 first connecting post
22 second connecting column
23 connecting arm
24 needle rack
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
In fig. 1-6, "front" and "rear" are relative orientations defined for convenience in describing structures, and are not substantial limitations on the structures.
As shown in fig. 1 to 3, the utility model provides a thread cutting and loosening mechanism, which comprises a curved needle 1, a movable knife 2 and a fixed knife 3, wherein the curved needle 1 is provided with a needle hole 5 for threading a thread 4, one end of the movable knife 2 is provided with a thread hooking port 6, and the other end of the movable knife 2 is connected with a thread loosening blade 7;
the thread releasing piece 7 is connected with a thread take-up torsion spring 8, the thread take-up torsion spring 8 is provided with a thread take-up arm 9 extending out, the thread take-up arm 9 is provided with a first thread through hole 10, and the thread 4 passes through the needle hole 5 of the curved needle 1 and the first thread through hole 10;
the movable knife 2 is driven by the driving mechanism to reciprocate, the movable knife 2 moves forwards to hook the suture 4 and then moves backwards to press the suture 4 on the fixed knife 3 for cutting off;
when the thread releasing blade 7 moves forwards along with the movable blade 2, the thread 4 pulls the thread picking arm 9 of the thread picking torsion spring 8 to enable the thread picking arm 9 to swing backwards; when the thread releasing blade 7 moves backward with the knife 2, the thread take-up arm 9 twists forward to pull the thread 4.
Referring to fig. 1 to 3, when the thread trimming and loosening mechanism of the present invention is used to trim thread, the movable knife 2 is driven by the driving mechanism to reciprocate back and forth, the movable knife 2 moves forward to hook the thread 4 and then moves backward to press the thread 4 on the fixed knife 3 for cutting; when the thread releasing blade 7 moves forwards along with the movable blade 2, the thread releasing blade 7 picks the thread 4 to tension the thread 4, and the tensioned thread 4 pulls the thread picking arm 9 of the thread picking torsion spring 8 to make the thread picking arm 9 swing backwards to tighten the torsion spring; when the thread releasing blade 7 moves backwards along with the movable blade 2, the tensioned suture 4 has a tendency to return to a loose state, and the suture 4 is pulled by the thread picking arm 9 swinging forwards under the action of the torsion spring, so that the suture 4 cannot be kept at a certain position due to too much loose state and the movable blade 2 cannot catch the suture 4. Therefore, the utility model discloses a trimming pine line mechanism can improve the stability of 4 positions of suture to improve trimming stability.
Referring to fig. 1, the movable blade 2 is in a state of not extending forward, at this time, the thread-picking torsion spring 8 is not twisted tightly, and the thread-picking arm 9 is also in a front position, as shown in fig. 2, the movable blade 2 extends forward and passes through the lower side of the thread 4, so that the thread-hooking opening 6 hooks the thread 4, in the process that the movable blade 2 passes through the lower side of the thread 4, the movable blade 2 drives the thread-releasing blade 7 to move forward to pick up the thread 4, so that the tension in the thread 4 is increased and the thread 4 is pulled out of a thread stand (the thread stand is located behind the thread-releasing blade 7, not shown in the figure), and because the tension in the thread 4 is increased, the thread-picking arm 9 is pulled backward by the thread-picking torsion spring 8, so that the thread-picking torsion spring 9 is twisted tightly; as shown in fig. 3, when the movable blade 2 and the thread releasing blade 7 move backward together to return to the original position, the thread 4 tends to be loosened, and the thread 4 is in a twisted state due to the tension of the thread 4 before the thread-taking-up torsion spring 8, at this time, the tension in the thread 4 becomes small, the thread-taking-up torsion spring 8 also returns to the original state, and the thread-taking-up arm 9 swings forward to make the thread 4 have a tension tendency to counteract the thread 4 loosening tendency, so that the thread 4 does not become loosened as in fig. 4, which avoids the thread 4 from being loosened too much to make the track of the thread 4 uncertain, and the thread 4 is easily released from the thread hooking opening 6 of the movable blade 2 during the process that the movable blade 2 hooks the thread 4 backward.
As shown in fig. 1 to 3, the fixed blade 3 is close to the upper side surface of the movable blade 2, the thread clamping piece 11 is arranged below the movable blade 2, and the thread clamping piece 11 is close to the lower side surface of the movable blade 2. The movable blade 2 extends to hook the suture 4 and then retracts backwards, the suture 4 is cut at the gap between the movable blade 2 and the fixed blade 3, and the movable blade 2 and the suture clamping blade 11 clamp the suture 4. As shown in fig. 1, a first thread passing piece 12 is arranged on the rear side of the thread releasing piece 7, a second thread passing piece 13 is arranged on the front side of the thread releasing piece 7, a second thread passing hole 14 and a third thread passing hole 15 are respectively arranged on the first thread passing piece 12 and the second thread passing piece 13, and the thread 4 sequentially passes through the second thread passing hole 14, the first thread passing hole 10 and the third thread passing hole 15. The thread releasing piece 7 comprises a first connecting part 18 and a second connecting part 19 which are perpendicular to each other, the first connecting part 18 is connected to the movable blade 2, and a thread passing waist hole 20 for the thread 4 to pass through is formed in the second connecting part 19. The string passing waist hole 20 extends in the front-rear direction. In this way, the tension in the suture 4 maintains a tendency to pull the thread take-up arm 9 backwards.
In a preferred embodiment, as shown in fig. 1 and 2, the curved needle 1 is provided with a thread passage 16 extending back and forth, and the suture 4 passes through the thread passage 16 and passes through the needle hole 5. Thus, the thread 4 is inserted into the thread passing channel 16 and is not easy to interfere with other parts. As shown in fig. 1, the curved needle 1 is provided with a thread inlet hole 17, and the suture 4 enters the thread passing channel 16 from the thread inlet hole 17.
As shown in fig. 4, in the case that the thread releasing piece 7 is not provided with the thread take-up torsion spring 8, it can be seen from the figure that the thread 4 is easy to be loosened excessively so that the thread track is uncertain, and the thread 4 is easy to be pulled out from the thread hooking opening 6 of the movable knife 2 in the process that the movable knife 2 hooks the thread 4 backwards.
Referring to fig. 5 and 6, a first connecting post 21 is disposed on the first connecting portion 18, a second connecting post 22 is disposed on the second connecting portion 19, the thread take-up torsion spring 8 is sleeved on the second connecting post 22, the thread take-up torsion spring 8 further has a connecting arm 23, and the connecting arm 23 is fixed on the first connecting post 21.
Referring to fig. 1, a curved needle 1 is connected to a needle frame 24, the needle frame 24 is driven by a driving mechanism (not shown) of the needle frame 24 to reciprocate back and forth, a movable blade 2 is connected with a thread releasing blade 7, the movable blade 2 is driven by the driving mechanism (not shown) to reciprocate back and forth, and a first thread passing blade 12 and a second thread passing blade 13 are both fixed on a frame (not shown).
And with the utility model discloses a thread trimming pine line mechanism correspondingly, the utility model discloses still provide a flat seaming machine, including above-mentioned technical scheme or its arbitrary preferred technical scheme thread trimming pine line mechanism.
Based on the technical scheme of above-mentioned embodiment, the utility model discloses a trimming pine line mechanism can improve the stability of suture position to improve trimming stability.
To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. It will be apparent to those skilled in the art that modifications and variations can be made to the above-described embodiments without departing from the spirit and scope of the invention, and it is intended that all equivalent modifications and variations be covered by the appended claims without departing from the spirit and scope of the invention.
Claims (9)
1. A thread cutting and loosening mechanism is characterized by comprising a curved needle, a movable cutter and a fixed cutter, wherein the curved needle is provided with a needle hole for penetrating a thread, one end of the movable cutter is provided with a thread hooking port, and the other end of the movable cutter is connected with a thread loosening blade;
the thread releasing piece is connected with a thread take-up torsion spring which is provided with a thread take-up arm extending out, and a first thread through hole is formed in the thread take-up arm, and a thread passes through a needle hole of the curved needle and passes through the first thread through hole;
the movable knife is driven by the driving mechanism to reciprocate, moves forwards to hook the suture and then moves backwards to press the suture on the fixed knife for cutting off;
when the thread releasing piece follow-up knife moves forwards, the thread pulls the thread take-up arm of the thread take-up torsion spring to enable the thread take-up arm to swing backwards; when the thread releasing piece moves backwards along with the follow-up knife, the thread picking arm twists forwards to pull the thread.
2. The thread trimming and releasing mechanism of claim 1, wherein: the fixed knife is close to the upper side face of the movable knife, a thread clamping piece is arranged below the movable knife, and the thread clamping piece is close to the lower side face of the movable knife.
3. The thread trimming and releasing mechanism of claim 1, wherein: the rear side of the thread loosening piece is provided with a first thread passing piece, the front side of the thread loosening piece is provided with a second thread passing piece, the first thread passing piece and the second thread passing piece are respectively provided with a second thread passing hole and a third thread passing hole, and the thread passes through the second thread passing hole, the first thread passing hole and the third thread passing hole in sequence.
4. The thread trimming and releasing mechanism of claim 1, wherein: the curved needle is provided with a thread passing channel extending forwards and backwards, and the suture passes through the thread passing channel and passes through the needle hole.
5. The thread trimming and releasing mechanism of claim 4, wherein: the curved needle is provided with a thread inlet hole, and a suture enters the thread passing channel from the thread inlet hole.
6. The thread trimming and releasing mechanism of claim 1, wherein: the thread loosening sheet comprises a first connecting portion and a second connecting portion which are perpendicular to each other, the first connecting portion is connected to the movable knife, and a thread passing waist hole for a thread to pass through is formed in the second connecting portion.
7. The thread trimming and releasing mechanism of claim 6, wherein: the line passing waist hole extends along the front-back direction.
8. The thread trimming and releasing mechanism of claim 6, wherein: the yarn picking device is characterized in that a first connecting column is arranged on the first connecting portion, a second connecting column is arranged on the second connecting portion, the yarn picking torsional spring is sleeved on the second connecting column, the yarn picking torsional spring is further provided with a connecting arm, and the connecting arm is fixed on the first connecting column.
9. A flat seaming machine comprising the thread trimming and releasing mechanism of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356544.6U CN210506737U (en) | 2019-08-20 | 2019-08-20 | Flat seaming machine and thread trimming and loosening mechanism thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921356544.6U CN210506737U (en) | 2019-08-20 | 2019-08-20 | Flat seaming machine and thread trimming and loosening mechanism thereof |
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| Publication Number | Publication Date |
|---|---|
| CN210506737U true CN210506737U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921356544.6U Active CN210506737U (en) | 2019-08-20 | 2019-08-20 | Flat seaming machine and thread trimming and loosening mechanism thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125679A (en) * | 2021-03-25 | 2022-09-30 | 杰克科技股份有限公司 | Chain type sewing machine capable of automatically cutting thread |
-
2019
- 2019-08-20 CN CN201921356544.6U patent/CN210506737U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125679A (en) * | 2021-03-25 | 2022-09-30 | 杰克科技股份有限公司 | Chain type sewing machine capable of automatically cutting thread |
| CN115125679B (en) * | 2021-03-25 | 2023-04-21 | 杰克科技股份有限公司 | Automatic chain sewing machine of cutting line |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |