CN108374246B - Bird nest preventing device for sewing machine - Google Patents
Bird nest preventing device for sewing machine Download PDFInfo
- Publication number
- CN108374246B CN108374246B CN201810366639.XA CN201810366639A CN108374246B CN 108374246 B CN108374246 B CN 108374246B CN 201810366639 A CN201810366639 A CN 201810366639A CN 108374246 B CN108374246 B CN 108374246B
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- thread
- sewing machine
- cutting knife
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 48
- 235000005770 birds nest Nutrition 0.000 title claims abstract description 20
- 235000005765 wild carrot Nutrition 0.000 title claims abstract description 20
- 238000005485 electric heating Methods 0.000 claims 3
- 238000009434 installation Methods 0.000 claims 1
- 239000004744 fabric Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000009966 trimming Methods 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004826 seaming Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/06—Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
- D05B65/006—Devices for severing the needle or lower thread with heated tools
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a bird nest preventing device for a sewing machine, which comprises a mounting frame, a driving source A, a driving source B, a thread cutting assembly and a thread hooking assembly, wherein the thread cutting assembly, the thread hooking assembly, the driving source A and the driving source B are respectively arranged on the mounting frame; after the sewing machine finishes sewing and trimming, the upper thread on the needle is hooked and clamped by the thread hooking device. When the sewing machine starts the seam next time, a next tangential knife is stretched on the cloth cover facing the running direction of the cloth and aligned with the seam starting needle position. In the subsequent seam lifting process, the thread cutting knife cuts the clamped upper thread. The invention can be used for modifying or additionally installing a plurality of sewing machine types such as the existing loop machine, the template machine, the pattern sewing machine, the lockstitch sewing machine and the like, and can prevent bird nest.
Description
Technical Field
The invention relates to the field of sewing machines, in particular to a bird nest preventing device for a sewing machine.
Background
When the bird nest, i.e. the sewing machine starts to sew, the upper thread in a free state remained on the needle is rolled into the bottom surface of the cloth by the rotating shuttle and is sewn on the bottom surface of the cloth by the subsequent sewing action, so that a group of bird nest-shaped stitch is formed, and the sewing quality and appearance are affected.
The invention patent with publication number of CN204185662U discloses a bird nest preventing device of a computerized thread cutting flat seaming machine, wherein a bird nest preventing blade is fixedly arranged in a presser foot.
The invention patent publication TW201402902A discloses a thread holding device for a sewing machine, in which a blade is fixed to the lower side of a needle hole.
Both of the above patents require specific parts and thus this solution has significant limitations. For example, the invention patent with publication number CN204185662U needs to be changed into a presser foot with an inner blade, however, the lockstitch sewing machine has a very large variety and model for making a process, and thus the use of bird nest prevention is limited. For example, the invention of TW201402902A requires a change to a needle plate with built-in blade, and as such, the needle plate of the sewing machine has a very large variety and model, thus limiting the use of bird nesting prevention.
Disclosure of Invention
The invention provides a bird nest preventing device for a sewing machine, which can realize the bird nest preventing function without replacing a specific presser foot or needle plate and the like. The machine is suitable for a plurality of machine types such as loop machine, plate molding machine, pattern sewing machine, flat seaming machine and the like. The bird nest prevention device includes: mounting bracket, actuating source A, actuating source B, tangent line subassembly, collude line subassembly, its characterized in that: the wire cutting assembly, the wire hooking assembly, the driving source A and the driving source B are respectively arranged on the mounting frame; the wire cutting assembly comprises a wire cutting tool mounting seat and a wire cutting tool; the lower end of the thread cutting knife mounting seat is provided with a thread cutting knife, and the output shaft of the driving source A can drive the thread cutting knife to move to a thread cutting position so as to cut off a sewing thread; the thread hooking assembly comprises a thread hooking seat, a thread hooking and a thread clamping spring piece, the thread hooking is arranged on the thread hooking seat and is obliquely oriented to a sewing needle position of the sewing machine, the thread clamping spring piece is pressed on the upper surface of the thread hooking, the front end of the thread hooking is provided with a hook head capable of hooking a sewing thread, and an output shaft of the driving source B can drive the thread hooking to move to the sewing needle position so as to hook the sewing thread when returning.
Further, the tangent line assembly also comprises a swing rod, a first connecting rod, a first hinge shaft, an L-shaped second connecting rod, a rotating shaft, a third connecting rod and a shaft; the rotary electromagnet is arranged on the mounting frame, an output shaft of the rotary electromagnet is fixedly connected with the swing rod, the swing rod is hinged with one end of the first connecting rod, the other end of the first connecting rod is hinged with one end of the second connecting rod, the corner of the second connecting rod is in rotary fit with the rotary shaft, and the rotary shaft is fixedly arranged on the mounting frame; the other end of the second connecting rod is hinged with one end of the third connecting rod, the end of the third connecting rod is fixedly connected with a tangential knife mounting seat, and the other end of the third connecting rod is inserted into the shaft pivoted on the mounting frame; the hooking component further comprises a fourth connecting rod, a fifth connecting rod and a sixth connecting rod; the cylinder is installed on the mounting frame and inclines towards the sewing machine's needle, the line is colluded the seat and is set firmly on the mounting frame, the rear end that the line colludes sets up the socket, peg graft in the socket the one end of fourth connecting rod, the other end of fourth connecting rod articulates the one end of fifth connecting rod, the other end of fifth connecting rod articulates the one end of sixth connecting rod, the other end of sixth connecting rod articulates the one end of push rod head, the other end of push rod head is fixed on the movable rod of cylinder. After the sewing machine finishes sewing and trimming, the upper thread on the needle is hooked and clamped by the thread hooking device. When the sewing machine starts the seam next time, a next tangential knife is stretched on the cloth cover facing the running direction of the cloth and aligned with the seam starting needle position. In the subsequent seam lifting process, the thread cutting knife cuts the clamped upper thread.
Further, the cutting knife can be a common knife or an electrothermal cutting knife. When the electric cutting knife is an electric cutting knife, the cutting knife comprises an electric cutting knife blade and an insulating seat, the electric cutting knife blade is arranged in the insulating seat, and the insulating seat is fixedly arranged on the cutting knife mounting seat.
Further, a thread sucking port is arranged in the thread hooking seat, one end of the thread sucking port faces the thread clamping spring piece, the other end of the thread sucking port is connected with an air sucking pipe, and when the thread is sewn and circulated again, the thread hook moves forward to suck the cut thread ends.
Further, the tangent position of the tangent knife is slightly higher than the lowest point of the tangent knife mounting seat. When the tangent knife mounting seat moves downwards to the bottom, the lowest point of the tangent knife mounting seat is abutted with the upper plane of the presser foot plate of the sewing machine, so that the difference of different cloth thicknesses is met, and the cut thread ends are consistent in length and short.
Compared with the prior art, the invention has simple structure, and can be used for modifying or additionally installing a plurality of sewing machine types such as the existing loop knot machine, the template machine, the pattern sewing machine, the flat sewing machine and the like, so that bird nests are prevented.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of another view of embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of another view of embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of embodiment 2 of the present invention.
Fig. 5 is a partial enlarged view of embodiment 2 of the present invention.
Fig. 6 is a schematic view of the entire machine after the machine of the present invention is installed.
Detailed Description
Example 1 referring to fig. 1-3, a bird nest prevention device for a hitching machine, comprising: the wire cutting assembly and the wire hooking assembly are respectively arranged on the mounting frame 1, and the mounting frame 1 is arranged on the hitching machine;
the cutting assembly comprises a rotary electromagnet 2, a swing rod 21, a first connecting rod 22, a first hinge shaft 23, an L-shaped second connecting rod 24, a rotating shaft 25, a third connecting rod 26, a cutting knife mounting seat 27, a cutting knife 28 and a shaft 29; the rotary electromagnet 2 is mounted on the mounting frame 1, an output shaft of the rotary electromagnet 2 is fixedly connected with the swing rod 21, the swing rod 21 is hinged with one end of the first connecting rod 22, the other end of the first connecting rod 22 is hinged with one end of the second connecting rod 24, the corner of the second connecting rod 24 is in rotary fit with the rotary shaft 25, and the rotary shaft 25 is fixedly arranged on the mounting frame 1; the other end of the second connecting rod 24 is hinged with one end of the third connecting rod 26, the other end of the third connecting rod 26 is fixedly connected with a tangential knife mounting seat 27, and the other end of the third connecting rod 26 is inserted into the shaft 29 pivoted on the mounting frame 1; the lower end of the tangent cutter mounting seat 27 is provided with a tangent cutter 28;
the wire hooking component comprises a cylinder 3, a wire hooking seat 31, a wire hooking 32, a fourth connecting rod 33, a fifth connecting rod 34, a sixth connecting rod 35 and a wire clamping spring piece 36; the cylinder 3 is installed on the mounting frame 1 and inclines towards the needle of the hitching machine, the wire hook seat 31 is fixedly arranged on the mounting frame 1, the wire hook seat 31 is provided with the wire hook 32 which can linearly approach and depart from the needle of the hitching machine, the wire clamping spring piece 36 fixedly arranged on the wire hook seat 31 is pressed on the upper surface of the wire hook 32, the front end of the wire hook 32 is provided with a hook head capable of hooking a sewing wire, the rear end of the wire hook 32 is provided with a socket 321, one end of the fourth connecting rod 33 is inserted into the socket 321, the other end of the fourth connecting rod 33 is hinged with one end of the fifth connecting rod 34, the other end of the fifth connecting rod 34 is hinged with one end of the sixth connecting rod 35, the other end of the sixth connecting rod 35 is hinged with one end of the push rod head, and the other end of the push rod head is fixed on a movable rod of the cylinder 3. The cutting knife 28 is a conventional cutting knife and is directly fixed on the cutting knife mounting seat 27. A wire suction opening is arranged in the wire hook seat 31, one end of the wire suction opening faces the wire clamping spring piece 36, and the other end of the wire suction opening is connected with a suction air pipe.
Because the bird nest preventing device removes the long thread ends when the looper is sewn, the cut thread ends can be sewn in the stitch by the subsequent reinforcement sewing, so that the stitch appearance is perfect.
Example 2, see FIGS. 4-5, is substantially the same as example 1 except that an electrothermal wire cutter is used for the wire cutter. The cutting blade 28 comprises an electrothermal cutting blade 281 and an insulating seat 282, the electrothermal cutting blade 281 is installed in the insulating seat 282, and the insulating seat 282 is fixedly arranged on the cutting blade mounting seat 27.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. For example:
(1) Changing the rotary electromagnet 2 into a rotary cylinder;
(2) The first link 22 is directly driven by a direct-push electromagnet or cylinder;
(3) The cylinder 3 is changed into a direct-pushing electromagnet.
Claims (5)
1. A bird nest preventing device for a sewing machine, comprising: mounting bracket (1), actuating source A, actuating source B, tangent line subassembly, collude line subassembly, its characterized in that: independent of the presser foot or needle plate; the wire cutting assembly, the wire hooking assembly, the driving source A and the driving source B are respectively arranged on the mounting frame (1);
the cutting assembly comprises a cutting knife mounting seat (27) and a cutting knife (28); the lower end of the thread cutting knife mounting seat (27) is provided with a thread cutting knife (28), and the output shaft of the driving source A can drive the thread cutting knife (28) to displace to a thread cutting position so as to cut off a sewing thread;
the thread hooking assembly comprises a thread hooking seat (31), a thread hooking (32) and a thread clamping spring piece (36), wherein the thread hooking (32) is arranged on the thread hooking seat (31) and obliquely faces to a sewing needle position of the sewing machine, the thread clamping spring piece (36) is pressed on the upper surface of the thread hooking (32), a hook head capable of hooking a sewing thread is arranged at the front end of the thread hooking (32), and an output shaft of the driving source B (3) can drive the thread hooking (32) to move to the sewing needle position so as to hook the sewing thread when returning;
the bottom of the thread cutting knife mounting seat (27) is smooth, and the front end of the thread cutting knife mounting seat is provided with a chamfer, so that the thread cutting knife mounting seat can slide when being abutted against the upper plane of the presser foot plate of the sewing machine;
the tangent position of the tangent knife (28) is slightly higher than the lowest point of the tangent knife mounting seat (27).
2. The bird nest preventing device for a sewing machine according to claim 1, wherein:
the tangent line assembly further comprises a swing rod (21), a first connecting rod (22), a first hinge shaft (23), an L-shaped second connecting rod (24), a rotating shaft (25), a third connecting rod (26) and a shaft (29); the rotary electromagnet is arranged on the mounting frame (1), an output shaft of the rotary electromagnet is fixedly connected with the swing rod (21), the swing rod (21) is hinged with one end of the first connecting rod (22), the other end of the first connecting rod (22) is hinged with one end of the second connecting rod (24), the corner of the second connecting rod (24) is in running fit with the rotating shaft (25), and the rotating shaft (25) is fixedly arranged on the mounting frame (1); the other end of the second connecting rod (24) is hinged with one end of the third connecting rod (26), the other end of the third connecting rod (26) is fixedly connected with a tangent knife mounting seat (27), and the other end of the third connecting rod (26) is inserted into the shaft (29) pivoted on the mounting frame (1);
the hooking component also comprises a fourth connecting rod (33), a fifth connecting rod (34) and a sixth connecting rod (35); the cylinder is installed on mounting bracket (1) and slope towards sewing machine's needle, line is colluded seat (31) and is set firmly on mounting bracket (1), the rear end that line colludes (32) sets up socket (321), peg graft in socket (321) the one end of fourth connecting rod (33), the other end of fourth connecting rod (33) articulates the one end of fifth connecting rod (34), the other end of fifth connecting rod (34) articulates the one end of sixth connecting rod (35), the other end of sixth connecting rod (35) articulates the one end of push rod head, the other end of push rod head is fixed on the movable rod of cylinder.
3. The bird nest preventing device for a sewing machine according to claim 1, wherein: the wire cutting knife (28) comprises an electric heating wire cutting blade (281) and an insulating seat (282), the electric heating wire cutting blade (281) is installed in the insulating seat (282), and the insulating seat (282) is fixedly arranged on the wire cutting knife installation seat (27).
4. The bird nest preventing device for a sewing machine according to claim 1, wherein: the cutting knife (28) is a non-electric heating cutting knife and is directly fixed on the cutting knife mounting seat (27).
5. The bird nest preventing device for a sewing machine according to claim 1, wherein: a wire suction opening is arranged in the wire hook seat (31), one end of the wire suction opening faces the wire clamping spring piece (36), and the other end of the wire suction opening is connected with a suction air pipe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107214153U TWM572906U (en) | 2018-04-02 | 2018-10-19 | Anti-nest device for sewing machine |
| TW107136863A TWI691629B (en) | 2018-04-02 | 2018-10-19 | Anti-bird nest device for sewing machine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820453602 | 2018-04-02 | ||
| CN2018204536026 | 2018-04-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108374246A CN108374246A (en) | 2018-08-07 |
| CN108374246B true CN108374246B (en) | 2023-11-28 |
Family
ID=63032618
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820580537.3U Active CN208201321U (en) | 2018-04-02 | 2018-04-23 | A kind of anti-Bird's Nest device of use in sewing machine |
| CN201810366639.XA Active CN108374246B (en) | 2018-04-02 | 2018-04-23 | Bird nest preventing device for sewing machine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820580537.3U Active CN208201321U (en) | 2018-04-02 | 2018-04-23 | A kind of anti-Bird's Nest device of use in sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN208201321U (en) |
| TW (2) | TWM572906U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208201321U (en) * | 2018-04-02 | 2018-12-07 | 强信机械科技(莱州)有限公司 | A kind of anti-Bird's Nest device of use in sewing machine |
| CN113529297A (en) * | 2020-04-17 | 2021-10-22 | 浙江沪龙科技股份有限公司 | Air blowing type bird nest prevention device and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6156691A (en) * | 1984-08-24 | 1986-03-22 | 三菱電機株式会社 | Yarn holder of sewing machine |
| US5158027A (en) * | 1991-12-19 | 1992-10-27 | Tapistron International, Inc. | Presser foot for hollow needle tufting apparatus |
| US5431119A (en) * | 1993-10-07 | 1995-07-11 | The Singer Company N.V. | Thread end holding device for a sewing machine |
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| CN204185662U (en) * | 2014-10-24 | 2015-03-04 | 黄广全 | The anti-Bird's Nest device of a kind of computer tangent line flat seam machine |
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| CN106400338A (en) * | 2016-11-22 | 2017-02-15 | 潘卫辉 | Crochet device for computerized quilting machine and working method of crochet device |
| CN208201321U (en) * | 2018-04-02 | 2018-12-07 | 强信机械科技(莱州)有限公司 | A kind of anti-Bird's Nest device of use in sewing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206873071U (en) * | 2017-06-23 | 2018-01-12 | 浙江中捷缝纫科技有限公司 | A kind of anti-Bird's Nest device of sewing machine |
| CN206928068U (en) * | 2017-07-24 | 2018-01-26 | 强信机械科技(莱州)有限公司 | A kind of anti-Bird's Nest device |
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2018
- 2018-04-23 CN CN201820580537.3U patent/CN208201321U/en active Active
- 2018-04-23 CN CN201810366639.XA patent/CN108374246B/en active Active
- 2018-10-19 TW TW107214153U patent/TWM572906U/en unknown
- 2018-10-19 TW TW107136863A patent/TWI691629B/en active
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|---|---|---|---|---|
| JPS6156691A (en) * | 1984-08-24 | 1986-03-22 | 三菱電機株式会社 | Yarn holder of sewing machine |
| US5158027A (en) * | 1991-12-19 | 1992-10-27 | Tapistron International, Inc. | Presser foot for hollow needle tufting apparatus |
| US5431119A (en) * | 1993-10-07 | 1995-07-11 | The Singer Company N.V. | Thread end holding device for a sewing machine |
| JP2000325683A (en) * | 1999-05-19 | 2000-11-28 | Juki Corp | Bird nest preventive device of sewing machine |
| CZ20001835A3 (en) * | 2000-05-18 | 2001-05-16 | Juki Kk | Bird nest preventive device of sewing machine |
| CN101265643A (en) * | 2007-03-15 | 2008-09-17 | 大和缝纫机制造株式会社 | Sewing machine with wire-cutting device |
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| CN204185662U (en) * | 2014-10-24 | 2015-03-04 | 黄广全 | The anti-Bird's Nest device of a kind of computer tangent line flat seam machine |
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| CN104963110A (en) * | 2015-07-15 | 2015-10-07 | 宁波天星机电科技有限公司 | Automatic sewing anti-nest template sewing device and control system |
| CN204919011U (en) * | 2015-08-18 | 2015-12-30 | 浙江中捷缝纫科技有限公司 | Sewing machine's trimming and yarn trapper |
| CN205115804U (en) * | 2015-10-30 | 2016-03-30 | 申洲针织（安徽）有限公司 | Automatic remove flush joint machine of end of a thread |
| CN205258817U (en) * | 2015-12-26 | 2016-05-25 | 东莞市飞杰电脑针车有限公司 | Pneumatic trapping mechanism |
| CN105544098A (en) * | 2016-01-27 | 2016-05-04 | 强信机械科技(莱州)有限公司 | Thread ball preventing device for sewing machine |
| CN106400338A (en) * | 2016-11-22 | 2017-02-15 | 潘卫辉 | Crochet device for computerized quilting machine and working method of crochet device |
| CN208201321U (en) * | 2018-04-02 | 2018-12-07 | 强信机械科技(莱州)有限公司 | A kind of anti-Bird's Nest device of use in sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201943910A (en) | 2019-11-16 |
| CN108374246A (en) | 2018-08-07 |
| CN208201321U (en) | 2018-12-07 |
| TWI691629B (en) | 2020-04-21 |
| TWM572906U (en) | 2019-01-11 |
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