CN111206347B - Device for reducing bird nest in sewing machine - Google Patents
Device for reducing bird nest in sewing machine Download PDFInfo
- Publication number
- CN111206347B CN111206347B CN202010066459.7A CN202010066459A CN111206347B CN 111206347 B CN111206347 B CN 111206347B CN 202010066459 A CN202010066459 A CN 202010066459A CN 111206347 B CN111206347 B CN 111206347B
- Authority
- CN
- China
- Prior art keywords
- knife
- thread
- sewing machine
- needle
- needle hole
- 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
Images
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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a device for reducing bird nests in a sewing machine, and belongs to the technical field of clothing manufacturing equipment. The device solves the technical problems that the existing device for reducing the nest of the sewing machine is large in size, and thread cutting is not accurate. The sewing machine comprises a needle plate with a needle hole, and the device comprises a fixed knife fixedly arranged at the bottom of the needle plate and a movable knife which can be independently driven to enable a thread take-up lever to cut threads when the thread take-up lever is at the highest point; an air blowing pipe facing to the direction of the needle hole and an air suction pipe facing to the direction of the cutting edge of the fixed cutter are arranged below the needle plate; the air blowing pipe can blow the head of the facial suture in the needle hole to the other side of the needle hole. The device can effectively reduce bird nests, and has the advantages of simple structure, small volume and accurate cutting of thread ends.
Description
Technical Field
The invention belongs to the technical field of clothing manufacturing equipment, relates to a sewing machine, and particularly relates to a device for reducing bird nests in the sewing machine.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. When a sewing machine sews cloth, a thread end with a certain length needs to be reserved at a needle eye of a machine needle when the sewing machine starts to sew the cloth, so that the thread end cannot be separated from the needle eye of the machine needle when the sewing machine starts to sew the cloth. The thread end with a certain length on the needle eye of the needle is left at the cloth sewing initial position to form a bird nest when sewing, and the bird nest can cause the following problems: 1. the attractiveness of the base line stitch of the sewn cloth is greatly influenced; 2. the wearing experience is influenced when the wearing products are left; 3. manual handling of the bird nest is time consuming and economically costly.
Chinese patent (publication No. CN204959274U, granted bulletin date: 2016-01-13) discloses an anti-bird nest structure of a flat sewing machine, which comprises an installation frame, a driving piece and a tool apron, wherein the tool apron is connected to the installation frame in a sliding manner, an output shaft of the driving piece is connected with a swinging connecting rod, the driving piece can drive the swinging connecting rod to swing, the swinging connecting rod is connected with the tool apron, the swinging connecting rod can drive the tool apron to move linearly on the installation frame in a swinging manner, and the anti-bird nest structure further comprises a limiting piece capable of adjusting the swinging amplitude of the swinging connecting rod; the fixed knife is fixedly arranged on the mounting frame, the movable knife is fixedly arranged on the knife holder, the movable knife can form shearing motion with the fixed knife along with the movement of the knife holder, and the end part of the movable knife is also provided with a hook body for hooking the thread.
The bird nest prevention structure in the patent document is large in size, easily forms interference with a machine needle, is not easy to accurately control thread end thread cutting opportunity, is long in thread end residue, influences the attractiveness of sewing materials, cannot timely and quickly clean the cut thread ends, and influences the repeated use of the bird nest prevention structure and the cleanliness of the sewing materials.
Disclosure of Invention
The invention provides a device for reducing bird nest in a sewing machine aiming at the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to provide a device that is small and can accurately and reliably cut out facial line end of a thread.
The purpose of the invention can be realized by the following technical scheme:
a device for reducing bird nests in a sewing machine comprises a needle plate with a needle hole, and is characterized by comprising a fixed knife fixedly arranged at the bottom of the needle plate and a movable knife which is arranged at the bottom of the needle plate and can swing, wherein the movable knife can be independently driven to enable a thread take-up lever of the sewing machine to be matched with the movable knife to finish thread cutting when the thread take-up lever is at the highest point, the fixed knife and the movable knife are both positioned on one side of the needle hole, the cutting edge of the fixed knife faces the needle hole, a thread hooking groove is formed in one side of the movable knife, a V-shaped cutting edge is formed in the other side of the movable knife, and the movable knife can swing to enable the cutting edge and the cutting edge of the fixed knife to form shearing motion; an air blowing pipe facing the direction of the needle hole and an air suction pipe facing the direction of the cutting edge of the fixed cutter are arranged below the needle plate; the air blowing pipe can blow the head of the facial thread in the needle hole to the other side of the needle hole.
The working principle is as follows: when the sewing machine starts to sew, the needle drives the upper thread to penetrate through the sewing material and reach the lower part of the needle plate, at the moment, the bottom thread and the thread end of the upper thread do not form a thread knot, and when the thread take-up lever rises to the highest point, the original thread end behind the needle can be fixed by a length and is left on the bottom surface of the sewing material. According to the technical scheme, the original movable knife is changed into an independent driving mode, the thread cutting is driven when a thread take-up lever rises to the highest point, before thread hooking, air is blown through an air blowing pipe, the thread end of a facial thread passing through a needle hole is blown to one side far away from the movable knife, then the movable knife starts to move, and thread hooking is carried out by utilizing a thread hooking groove on one side of the movable knife; when the moving knife finishes moving, the air blowing pipe stops blowing air, the air suction pipe is opened, the moving knife starts to reset, at the moment, the head of the facial suture is not deviated to one side far away from the moving knife, the blade edge on the other side of the moving knife hooks the head of the facial suture to move towards the direction of the fixed knife, and the blade edge of the moving knife is matched with the blade edge of the fixed knife to form shearing motion work, so that the head of the facial suture left under the sewing cloth is sheared; the suction pipe sucks the cut thread end of the upper thread. In the technical scheme, the distance between the cutting edge of the original fixed knife and the needle hole is very small, so that the thread end of the upper thread left under the sewing material is very short, the thread end is prevented from being wound into a thread knot in the subsequent sewing process, and the aim of reducing the bird nest phenomenon is effectively fulfilled; moreover, the device has the advantages of fewer parts, simple structure, small occupied space, no interference with other parts in the sewing machine, accurate action and reliable durability.
In the device for reducing bird nests in the sewing machine, the middle part of the movable knife is hinged to the bottom of the needle plate through a shaft position screw, the end face of one end of the movable knife is an arc-shaped end face, and the wire hooking groove and the knife edge are respectively positioned on two sides of the end of the movable knife; when the movable cutter swings, the arc-shaped end face passes through the middle part right below the needle hole. The thread hooking groove on one side of the upper arc-shaped end surface of the movable cutter is used for hooking the upper thread, and the cutter edge on the other side of the upper arc-shaped end surface of the movable cutter is matched with the fixed cutter to cut off the thread head of the upper thread.
In the device for reducing bird's nest in the sewing machine, the groove bottom surface of the thread hooking groove is an arc surface, and a thread hooking tip is formed between the groove wall on one side of the thread hooking groove and the arc end surface. Thus, the upper thread can be hooked effectively.
In the device for reducing bird's nest in the sewing machine, the orthographic projection of the fixed knife is in a Z-shaped bent structure, and one end of the fixed knife is fixedly connected to the bottom of the needle plate through a fixing screw; the bottom of the needle plate is also provided with an installation groove, and the cutting edge of the fixed knife is positioned at the other end of the fixed knife, and the end is positioned in the installation groove after being bent towards one side. One end of the fixed cutter is arranged in the mounting groove, so that the whole structure is more compact, the fixed cutter is fixedly connected with the needle plate through a fixing screw, and the stability of the fixed cutter is ensured.
In the device for reducing bird nests in the sewing machine, the air suction pipe is positioned on one side of the fixed knife, which is far away from the needle hole, and the air blowing pipe is positioned on one side of the movable knife, which is far away from the needle hole; the included angle between the length directions of the air suction pipe and the air blowing pipe is an acute angle. The arrangement of the air blowing pipe and the air suction pipe is convenient for blowing off the facial line and sucking the head of the cut facial line, and the included angle between the air blowing pipe and the air suction pipe is an acute angle, so that the interference between the air blowing pipe and the air suction pipe during the working process can be prevented.
Alternatively, the air blowing pipe can be replaced by an air suction device, a wire sweeping device, a wire hooking device and the like.
Compared with the prior art, the invention has the following advantages:
1. the device for reducing the bird nest in the sewing machine is simple in structure and convenient to operate, effectively reduces the bird nest in the cloth sewing process, and improves the attractiveness of stitches.
2. The thread cutting of the device for reducing bird nests in the sewing machine is realized by reusing the original thread cutting mechanism in an independent driving mode, so that the additional manufacturing cost is low, and the thread cutting performance is good.
3. The device for reducing the bird nest in the sewing machine can avoid the problem of messy working environment and the like caused by no cleaning of the thread head by arranging the suction pipe to suck the cut thread head.
Drawings
Fig. 1 is a schematic perspective view of the present apparatus.
Fig. 2 is a schematic structural diagram of the moving blade in the device.
In the figure, 1, a needle plate; 1a, a pinhole; 2. a noodle thread end; 3. fixing a cutter; 4. moving a knife; 5. a wire hooking groove; 6. a knife edge; 7. an air blowing pipe; 8. an air suction pipe; 9. an axial screw; 10. an arc-shaped end face; 11. a set screw; 12. and installing a groove.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 and fig. 2, the sewing machine comprises a needle plate 1 with a needle hole 1a, the device comprises a fixed knife 3 fixedly arranged at the bottom of the needle plate 1 and a movable knife 4 which is arranged at the bottom of the needle plate 1 and can swing, the fixed knife 3 and the movable knife 4 are both arranged at one side of the needle hole 1a, the cutting edge of the fixed knife 3 faces the needle hole 1a direction, one side of the movable knife 4 is provided with a line hooking groove 5, the other side of the movable knife 4 is provided with a V-shaped knife edge 6, and the movable knife 4 can swing to enable the knife edge 6 and the cutting edge of the fixed knife 3 to form shearing; an air blowing pipe 7 facing the direction of the needle hole 1a and an air suction pipe 8 facing the direction of the cutting edge of the fixed knife 3 are arranged below the needle plate 1; the air blow pipe 7 can blow the upper thread end 2 in the pinhole 1a to the other side of the pinhole 1 a; the air suction pipe 8 is positioned on one side of the fixed knife 3 away from the pinhole 1a, and the air blowing pipe 7 is positioned on one side of the movable knife 4 away from the pinhole 1 a; the included angle between the length directions of the air suction pipe 8 and the air blowing pipe 7 is an acute angle.
When the sewing machine starts to sew, the needle drives the upper thread to penetrate through the sewing material and reach the lower part of the needle plate 1, at the moment, a bottom thread and the upper thread end 2 do not form a thread knot, the upper thread needs to be hooked and clamped before the take-up lever takes up the thread, and when the take-up lever rises to the highest point, the upper thread end 2 behind the original needle can be left on the bottom surface of the sewing material. In the embodiment, the thread hooking structure is arranged on the movable knife 4, the movable knife 4 can swing, thread hooking is realized through the thread hooking groove 5, before thread hooking, air is blown through the air blowing pipe 7, the thread head 2 of the upper thread passing through the needle hole 1a is blown to one side far away from the movable knife 4, then the movable knife 4 starts to move, and thread hooking is carried out by utilizing the thread hooking groove 5 on one side of the movable knife; when the moving blade 4 finishes moving, the air blowing pipe 7 stops blowing air, the air suction pipe 8 is opened, the moving blade 4 starts to reset, at the moment, the noodle thread head 2 is not deviated to one side far away from the moving blade 4, the blade 6 on the other side of the moving blade 4 hooks the noodle thread head 2 to move towards the direction of the fixed blade 3, and the blade 6 of the moving blade 4 is matched with the blade of the fixed blade 3 to form shearing motion work, so that the noodle thread head 2 is sheared; the suction pipe 8 sucks the cut upper thread end 2 away. In the technical scheme, the distance between the cutting edge of the fixed knife 3 and the needle hole 1a is very small, so that the upper thread end 2 left on the sewing material is very short, and the aim of reducing bird nest phenomenon is effectively fulfilled; moreover, the device has fewer parts, simple structure and small occupied space, and can not form interference with other parts in the sewing machine, and the action is accurate and reliable.
Further, as shown in fig. 1 and 2, the middle part of the movable knife 4 is hinged to the bottom of the needle plate 1 through a shaft position screw 9, the end face of one end of the movable knife 4 is an arc-shaped end face 10, and the thread hooking groove 5 and the knife edge 6 are respectively positioned on two sides of the end of the movable knife 4; when the movable knife 4 swings, the arc end face 10 passes through the middle part right below the needle hole 1 a; the bottom surface of the wire hooking groove 5 is an arc surface, and a wire hooking tip is formed between the groove wall on one side of the wire hooking groove 5 and the arc end surface 10; the orthographic projection of the fixed knife 3 is of a Z-shaped bent structure, and one end of the fixed knife 3 is fixedly connected to the bottom of the needle plate 1 through a fixing screw 11; the bottom of the needle plate 1 is also provided with a mounting groove 12, and the cutting edge of the fixed knife 3 is positioned at the other end of the fixed knife 3, and the end is positioned in the mounting groove 12 after being bent towards one side. The axial position screw 9 hinges the movable knife 4 on the needle plate 1, the thread hooking groove 5 on one side of the arc end surface 10 on the movable knife 4 is used for hooking the upper thread, and the knife edge 6 on the other side is used for cutting off the thread head 2 of the upper thread; one end of the fixed knife 3 is fixed on the needle plate 1 by the fixing screw 11, and the other end of the fixed knife 3 is arranged in the mounting groove 12 on the needle plate 1, so that the structure is more compact; the fixed knife 3 is matched with the movable knife 4, so that the upper thread head 2 can be hooked and cut off accurately and stably, and the upper thread head 2 is ensured to be short enough.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although 1, a needle board is used more herein; 1a, a pinhole; 2. a noodle thread end; 3. fixing a cutter; 4. moving a knife; 5. a wire hooking groove; 6. a knife edge; 7. an air blowing pipe; 8. an air suction pipe; 9. an axial screw; 10. an arc-shaped end face; 11. a set screw; 12. mounting grooves, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (5)
1. A device for reducing bird nests in a sewing machine comprises a needle plate (1) with a needle hole (1a), and is characterized in that the device comprises a fixed knife (3) fixedly arranged at the bottom of the needle plate (1) and a movable knife (4) which is arranged at the bottom of the needle plate (1) and can swing, the movable knife (4) can be independently driven and can be matched with the fixed knife (3) to complete a thread cutting action when a thread take-up lever of the sewing machine rises to a highest point, and an air blowing pipe (7) facing the needle hole (1a) and an air suction pipe (8) facing the cutting edge direction of the fixed knife (3) are arranged below the needle plate (1); the air blowing pipe (7) can blow the upper thread end (2) in the needle hole (1a) to the other side of the needle hole (1 a); the utility model discloses a needle hole (1a) needle hole, including stationary knife (3) and movable knife (4), the cutting edge orientation of stationary knife (3) pinhole (1a) direction, one side of moving knife (4) has collude line groove (5), the opposite side of moving knife (4) has edge of a knife (6) of V type just move knife (4) and can swing the messenger edge of a knife (6) with the cutting edge of stationary knife (3) forms shearing movement.
2. The device for reducing the bird nest in the sewing machine according to claim 1, characterized in that the middle part of the movable knife (4) is hinged at the bottom of the needle plate (1) through a shaft position screw (9), the end surface of one end of the movable knife (4) is an arc end surface (10), and the thread hooking groove (5) and the knife edge (6) are respectively positioned at two sides of the end of the movable knife (4); when the movable knife (4) swings, the arc-shaped end surface (10) passes through the middle part right below the needle hole (1 a).
3. Device for reducing bird's nest in a sewing machine according to claim 2, characterized in that the groove bottom surface of the hooking groove (5) is a circular arc surface, and a hooking tip is formed between one side groove wall of the hooking groove (5) and the arc end surface (10).
4. The device for reducing bird's nest in a sewing machine according to claim 3, characterized in that the orthographic projection of the fixed knife (3) is in a Z-shaped bent structure, and one end of the fixed knife (3) is fixedly connected to the bottom of the needle plate (1) through a fixing screw (11); the bottom of the needle plate (1) is also provided with an installation groove (12), and the cutting edge of the fixed knife (3) is positioned at the other end of the fixed knife (3), and the end is bent towards one side and then positioned in the installation groove (12).
5. The device for reducing bird's nest in a sewing machine according to claim 2 or 3 or 4, characterized in that the air suction pipe (8) is located on the side of the stationary knife (3) away from the needle hole (1a), and the air blowing pipe (7) is located on the side of the movable knife (4) away from the needle hole (1 a); the included angle between the length directions of the air suction pipe (8) and the air blowing pipe (7) is an acute angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010066459.7A CN111206347B (en) | 2020-01-20 | 2020-01-20 | Device for reducing bird nest in sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010066459.7A CN111206347B (en) | 2020-01-20 | 2020-01-20 | Device for reducing bird nest in sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111206347A CN111206347A (en) | 2020-05-29 |
| CN111206347B true CN111206347B (en) | 2021-06-25 |
Family
ID=70782409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010066459.7A Active CN111206347B (en) | 2020-01-20 | 2020-01-20 | Device for reducing bird nest in sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111206347B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0716780U (en) * | 1993-08-30 | 1995-03-20 | ジューキ株式会社 | Device for adjusting the empty ring cutting length of sewing machine |
| CN104652054B (en) * | 2015-03-17 | 2018-06-05 | 浙江中捷缝纫科技有限公司 | A kind of thread cutting mechanism of sewing machine |
| CN204570210U (en) * | 2015-03-17 | 2015-08-19 | 浙江中捷缝纫科技有限公司 | A kind of thread cutting mechanism of Sewing machines |
| CN204780201U (en) * | 2015-06-17 | 2015-11-18 | 浙江中捷缝纫科技有限公司 | Sewing machine's thread trimming mechanism |
| CN104862891B (en) * | 2015-06-17 | 2017-05-31 | 浙江中捷缝纫科技有限公司 | A kind of thread cutting mechanism of sewing machine |
| 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 |
| CN208917470U (en) * | 2018-08-24 | 2019-05-31 | 杰克缝纫机股份有限公司 | A kind of automatic shearing the end of a thread device of sewing machine |
| CN109778446B (en) * | 2019-02-22 | 2021-04-13 | 杰克缝纫机股份有限公司 | Bird nest preventing device of sewing machine |
| CN110359194B (en) * | 2019-07-24 | 2021-06-04 | 杰克缝纫机股份有限公司 | Trimming air suction device and sewing machine |
-
2020
- 2020-01-20 CN CN202010066459.7A patent/CN111206347B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111206347A (en) | 2020-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208917470U (en) | A kind of automatic shearing the end of a thread device of sewing machine | |
| CN111206347B (en) | Device for reducing bird nest in sewing machine | |
| CN109306576B (en) | Thread trimming device on sewing machine and control method thereof | |
| CN109706648B (en) | Automatic thread trimming device on sewing machine | |
| CN111593506A (en) | Sewing machine with three-cutter linkage thread trimming function | |
| JP2010188106A (en) | Thread cutter for button sewing machine | |
| CN108374246B (en) | Bird nest preventing device for sewing machine | |
| CN212051883U (en) | Thread grabbing and bird nest preventing structure of sewing machine | |
| CN109137286A (en) | Thread cutter | |
| CN115434083A (en) | Sewing machine movable cutter structure and thread cutting device thereof | |
| CN211921871U (en) | Thread cutting device of sewing machine for sewing bags | |
| CN209636473U (en) | A kind of chain type towel bright piece embroidery device | |
| CN209144401U (en) | A kind of anti-Bird's Nest structure of sewing machine | |
| US4072116A (en) | Overedge stitch sewing machine | |
| CN214032926U (en) | Suction-proof movable upper knife and cloth cutting mechanism | |
| CN219364013U (en) | Automatic thread breaking device for sewing machine | |
| KR20020090143A (en) | Thread cutting device of sewing machine | |
| CN213295746U (en) | Sewing machine with three-cutter linkage thread trimming function | |
| CN208857472U (en) | A kind of angle seam flat seam machine | |
| CN109629132B (en) | Thread trimming mechanism on sewing machine | |
| CN211005905U (en) | Thread cutting device of sewing machine | |
| CN214362122U (en) | Combined automatic chopper of sewing machine | |
| CN214362123U (en) | Automatic chopper of sewing machine | |
| US2070029A (en) | Thread-cutter for sewing machines | |
| CN211005907U (en) | Bird nest preventing structure of sewing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |