CN108754901B - Thread and hair cleaning device at sewing machine bottom thread allowance detection position - Google Patents
Thread and hair cleaning device at sewing machine bottom thread allowance detection position Download PDFInfo
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- CN108754901B CN108754901B CN201810548248.XA CN201810548248A CN108754901B CN 108754901 B CN108754901 B CN 108754901B CN 201810548248 A CN201810548248 A CN 201810548248A CN 108754901 B CN108754901 B CN 108754901B
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- thread
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- rotating shuttle
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- photoelectric sensor
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
- D05B59/02—Devices for determining or indicating the length of thread still on the bobbin
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- 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
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- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a thread and wool cleaning device at a bottom thread allowance detection position of a sewing machine, and belongs to the technical field of sewing equipment. The technical problem that the detection of the bottom thread allowance of the existing sewing machine is prone to making mistakes is solved. The sewing machine comprises a thread trimming knife rest, a bottom plate and a rotating shuttle, wherein a photoelectric sensor facing the rotating shuttle is fixedly arranged on the bottom plate; the thread hair cleaning device comprises a cleaning piece, the cleaning piece is arranged on the outer side of the rotating shuttle and is positioned between the photoelectric sensor and the rotating shuttle, the cleaning piece is fixedly connected to the thread trimming cutter frame and can rotate around the rotating shuttle under the driving of the thread trimming cutter frame, and the cleaning piece is provided with a light passing space which can allow light rays of the photoelectric sensor to pass through when the light rays are emitted into the rotating shuttle. The thread hair cleaning device cleans thread hair at regular time through the cleaning piece, and effectively prevents light rays of the photoelectric sensor from being accumulated by the thread hair at the channel position to influence the detection accuracy and reliability.
Description
Technical Field
The invention belongs to the technical field of sewing machine equipment, relates to a bottom thread allowance detection mechanism of a sewing machine, and particularly relates to a thread wool cleaning device at a bottom thread allowance detection part of 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 fabric, thereby interweaving or stitching together one or more layers of the fabric. When the sewing machine is used for sewing the fabric, the rotating shuttle and the needle of the sewing machine are matched with each other to enable the bottom thread and the surface thread to be interwoven and sewn on the fabric in a linkage manner, so that a stitch is formed. The upper thread penetrates through a needle eye of the machine needle, and the machine needle performs ascending and descending motions; the rotary shuttle is composed of a bobbin case and a bobbin, the bobbin is accommodated in the bobbin case, and a bobbin thread is wound around the bobbin. The upper thread is generally longer, 3000m-4000m, and the user can observe the amount of the upper thread at any time during the sewing process, so the upper thread can be replaced in time. However, due to the limitation of the space and mechanism principle of the sewing machine, the bobbin thread is generally short and only 20m-50m, so the bobbin thread needs to be frequently replaced in the sewing process, the bobbin thread is not easy to observe in the rotating shuttle, if the bobbin thread is used up and is not found, the idle stepping phenomenon can occur, a pinhole is generated on the cloth, the waste of precious cloth is caused, and the reworking intensity of workers is increased. Therefore, the baseline margin detection should be performed, most of the current baseline margin detection methods use a photoelectric sensor for detection, and the principle is that light is incident on the surface of a reflective object and reflects the light to achieve the purpose of receiving signals. However, in the sewing process, the thread and the cloth are easy to generate thread burrs which are adhered and accumulated at each corner of the front end of the bottom plate of the sewing machine, and when the thread burrs are accumulated to block the incidence and reflection of the light of the photoelectric sensor, the condition that the detection of the bottom thread is invalid is easy to occur.
For example, Chinese patent (publication No. CN107653582A, published: 2018-02-02) discloses a detection structure for bobbin thread on a bobbin of a sewing machine, wherein the bobbin comprises a cylinder with a through hole, the through hole is arranged along the axis of the cylinder, two ends of the cylinder are respectively provided with a baffle extending outwards along the radial direction of the cylinder, a winding slot is formed between the two baffles, and the detection structure comprises an electric control module and a photoelectric sensor connected with the electric control module; the bottom of the winding groove is provided with a first reflecting layer, the opposite side surfaces of the two baffles are defined to be inner side surfaces, the other side surface is an outer side surface, a second reflecting layer is arranged on the outer side surface of at least one baffle in the two baffles, at least one light transmitting hole is formed in the baffle with the second reflecting layer, the photoelectric sensor can respectively emit light beams to the second reflecting layer and the first reflecting layer, and the second reflecting layer and the first reflecting layer can respectively reflect the emitted light beams back to the photoelectric sensor.
In the above patent document, whether the bobbin thread is used up is detected by the photoelectric sensor and the light reflecting element is designed on the bobbin, and the phenomenon of detection failure is also caused because too much thread hair is accumulated to influence the light beam of the photoelectric sensor.
Disclosure of Invention
The invention provides a thread and hair cleaning device for a bottom thread allowance detection part of 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 effectively clear away the thread hair that sewing machine bottom line surplus detected the department in time and thereby guarantee the accurate reliability of bottom line surplus detection.
The purpose of the invention can be realized by the following technical scheme:
a thread and hair cleaning device at the bottom thread allowance detection position of a sewing machine comprises a thread cutting knife rest, a bottom plate and a rotating shuttle, wherein a photoelectric sensor facing the rotating shuttle is fixedly arranged on the bottom plate; the cleaning device is characterized by comprising a cleaning piece, wherein the cleaning piece is arranged on the outer side of the rotating shuttle and is positioned between the photoelectric sensor and the rotating shuttle, the cleaning piece is fixedly connected to the thread cutting tool rest and can rotate around the rotating shuttle under the driving of the thread cutting tool rest, and the cleaning piece is provided with a light passing space through which light rays of the photoelectric sensor can pass when being emitted into the rotating shuttle.
The principle is as follows: the cleaning piece is fixedly arranged on the thread cutting knife rest, when the thread cutting mechanism of the sewing machine is in an initial state, the thread cutting knife rest and the cleaning piece do not act, and light rays of the photoelectric sensor can irradiate into the interior of the rotating shuttle through the light passing space of the cleaning piece to detect the bottom thread in the rotating shuttle. When the thread is required to be cut, the thread cutting knife rest can swing, so that the cleaning piece is driven to rotate around the rotating shuttle, and the cleaning piece moves circumferentially along with the thread cutting knife rest to the highest point of the thread cutting position; the photoelectric sensor can not detect the bottom thread in the rotating shuttle for a short time, the cleaning piece resets to the initial position along with the thread cutting knife rest after the thread cutting is finished, and the photoelectric sensor detects the bottom thread in the rotating shuttle, so that the cleaning piece moves along with the thread cutting knife rest once when the sewing machine cuts the thread once, and the thread can be cleaned by poking and cleaning once. The cleaning piece is used for cleaning the thread hair regularly, so that the light of the photoelectric sensor is effectively prevented from being accumulated by the thread hair at the channel position to influence the detection accuracy and reliability.
The thread and hair cleaning device in the technical scheme has the advantages of simple structure, low manufacturing cost and convenience in installation, only needs to be installed on a transmission part of the existing sewing machine, does not increase a complex structure, has strong universality and is suitable for any automatic thread trimming lockstitch sewing machine; and has good cleaning effect on the thread hairs.
In the thread and hair cleaning device at the bobbin thread allowance detection position of the sewing machine, the cleaning piece comprises a first blocking part located at the bottom and a second blocking part located at the side part, a third blocking part is further arranged on the side edge of the second blocking part, and the first blocking part, the second blocking part and the third blocking part jointly surround the light passing space. The cleaning part area is positioned below the light of the photoelectric sensor, and the rest part covers the periphery of the photoelectric sensor on the premise of not influencing the detection, and the light of the photoelectric sensor is in a partially closed protection state, so that the stability and the reliability of light signals are ensured.
In the thread and hair cleaning device at the bobbin thread allowance detection position of the sewing machine, one side of the second blocking part faces the light passing space, the other side of the second blocking part is fixedly provided with the cleaning part, and the outer edge of the cleaning part is provided with the bent folded edge.
In the thread and hair cleaning device at the bobbin thread allowance detection position of the sewing machine, one side of the cleaning part facing the photoelectric sensor is also provided with a abdicating groove; the cleaning portion is adjacent to the outer peripheral surface of the rotating shuttle towards the end surface of the rotating shuttle. Thus, when the cleaning piece moves along with the trimming knife rest, the cleaning part and the photoelectric sensor are prevented from interfering with each other.
In the thread and hair cleaning device at the bobbin thread allowance detection position of the sewing machine, the cleaning piece is provided with a connecting part, the connecting part is provided with a connecting hole, and a connecting bolt capable of being screwed on the thread cutting knife rest is inserted into the connecting hole.
In the thread and hair cleaning device at the sewing machine bottom thread allowance detection position, the cleaning piece is integrally formed by adopting an assembled structural piece or a sheet metal stamping. Therefore, when the existing sewing machine is improved, the thread and the hair can be cleaned only by adding a single part, the structure is simple, the manufacturing cost is low, and the installation is convenient.
In the thread and hair cleaning device at the bottom thread allowance detection position of the sewing machine, the bottom plate is fixedly provided with the mounting support, and the photoelectric sensor is fixedly connected to the mounting support. The bottom plate is normal sewing machine bottom plate, and photoelectric sensor passes through installing support fixed mounting on the bottom plate, and its mounting means can be the same with prior art, also can make the adaptation adjustment according to this structure of cleaning the piece, prevents that both from interfering mutually, the holistic structure of also being convenient for simultaneously assembles.
Compared with the prior art, the thread and hair cleaning device has the following advantages:
1. the thread hair cleaning device cleans thread hair at regular time through the cleaning piece, and effectively prevents light rays of the photoelectric sensor from being accumulated by the thread hair at the channel position to influence the detection accuracy and reliability.
2. The thread and hair cleaning device is simple in structure, low in manufacturing cost and convenient to install, only needs to be installed on a transmission part of the existing sewing machine, does not increase a complex structure, is high in universality, and is suitable for any automatic thread trimming lockstitch sewing machine; and has good cleaning effect on the thread hairs.
Drawings
FIG. 1 is a schematic view of the installation structure of a cleaning element and a photoelectric sensor in the lint cleaning device.
Fig. 2 is a schematic view of the installation and use structure of the thread cleaning device in an initial state.
Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.
Fig. 4 is a schematic view of the installation and use structure of the lint removing device in a cleaning state.
In the figure, 1, a bottom plate; 2. a trimming knife rest; 3. a rotating shuttle; 4. a photosensor; 41. light rays; 5. a cleaning member; 51. a light passing space; 52. a first blocking part; 53. a second blocking part; 54. a third blocking part; 55. a cleaning part; 55a, folding edges; 55b, a yielding groove; 56. a connecting portion; 56a, a connecting hole; 6. mounting a bracket; 7. and connecting the bolts.
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 to 4, the sewing machine comprises a thread trimming blade carrier 2, a base plate 1 and a rotating shuttle 3, wherein a mounting bracket 6 is fixedly arranged on the base plate 1, and a photoelectric sensor 4 facing the rotating shuttle 3 is fixedly arranged on the mounting bracket 6; the thread and hair cleaning device comprises a cleaning piece 5, wherein the cleaning piece 5 is arranged on the outer side of a rotating shuttle 3 and is positioned between a photoelectric sensor 4 and the rotating shuttle 3, the cleaning piece 5 is fixedly connected to a thread trimming cutter frame 2 and can rotate around the rotating shuttle 3 under the driving of the thread trimming cutter frame 2, and the cleaning piece 5 is provided with a light passing space 51 through which light 41 of the photoelectric sensor 4 can pass when being injected into the rotating shuttle 3; specifically, the cleaning element 5 comprises a first blocking part 52 positioned at the bottom and a second blocking part 53 positioned at the side, the side edge of the second blocking part 53 is also provided with a third blocking part 54, and the first blocking part 52, the second blocking part 53 and the third blocking part 54 jointly enclose a light passing space 51; one side of the second blocking part 53 faces the light passing space 51, the other side of the second blocking part 53 is fixedly provided with a cleaning part 55, and the outer edge of the cleaning part 55 is provided with a bent folded edge 55 a; one side of the cleaning part 55 facing the photoelectric sensor 4 is also provided with a abdicating groove 55 b; the cleaning portion 55 is brought into close proximity to the outer peripheral surface of the rotary hook 3 toward the end surface of the rotary hook 3; the cleaning tool 5 has a connecting portion 56, the connecting portion 56 has a connecting hole 56a, and a connecting bolt 7 capable of being screwed to the trimming blade holder 2 is inserted into the connecting hole 56 a. The cleaning element 5 is fixedly mounted on the thread trimming blade holder 2, and in an initial state, the thread trimming mechanism of the sewing machine does not operate, the thread trimming blade holder 2 and the cleaning element 5 do not operate, and the light 41 of the photoelectric sensor 4 can irradiate into the interior of the rotating shuttle 3 through the light passing space 51 of the cleaning element 5 to detect the bobbin thread in the rotating shuttle 3. When the thread is required to be cut, the thread cutting knife rest 2 can swing, so that the cleaning piece 5 is driven to rotate around the rotating shuttle 3, and the cleaning piece 5 moves circumferentially along with the thread cutting knife rest 2 to the highest point of the thread cutting position; the photoelectric sensor 4 can not detect the bottom thread in the rotating shuttle 3 within a short time, the cleaning piece 5 resets to the initial position along with the thread cutting knife rest 2 after the thread cutting is finished, and the photoelectric sensor 4 detects the bottom thread in the rotating shuttle 3 again, so that the cleaning piece 5 acts once along with the thread cutting knife rest 2 every time the sewing machine cuts the thread, and the thread is cleaned by poking and brushing once. The cleaning piece 5 is used for cleaning the thread hair at regular time, so that the light 41 of the photoelectric sensor 4 is effectively prevented from being accumulated by the thread hair at the channel position to influence the detection accuracy and reliability; the thread and hair cleaning device has the advantages of simple structure, low manufacturing cost and convenient installation, only needs to be installed on a transmission part of the existing sewing machine, does not increase a complex structure, has strong universality and is suitable for any automatic thread trimming lockstitch sewing machine; and has good cleaning effect on the thread hairs.
The cleaning part 5 in the embodiment is integrally formed by adopting an assembled structural part or sheet metal stamping; when the cleaning piece 5 is integrally formed by stamping a metal plate, the thread and the hair can be cleaned only by adding a single part in the process of improving the existing sewing machine, and the cleaning machine is simple in structure, low in manufacturing cost and convenient to install.
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, the bottom plate is used more herein; 2. a trimming knife rest; 3. a rotating shuttle; 4. a photosensor; 41. light rays; 5. a cleaning member; 51. a light passing space; 52. a first blocking part; 53. a second blocking part; 54. a third blocking part; 55. a cleaning part; 55a, folding edges; 55b, a yielding groove; 56. a connecting portion; 56a, a connecting hole; 6. mounting a bracket; 7. connecting bolts, 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 (6)
1. A thread and hair cleaning device at the bottom thread allowance detection position of a sewing machine comprises a thread cutting knife rest (2), a bottom plate (1) and a rotating shuttle (3), wherein a photoelectric sensor (4) facing the rotating shuttle (3) is fixedly arranged on the bottom plate (1); the thread and hair cleaning device is characterized by comprising a cleaning piece (5), wherein the cleaning piece (5) is arranged on the outer side of the rotating shuttle (3) and is positioned between the photoelectric sensor (4) and the rotating shuttle (3), the cleaning piece (5) is fixedly connected to the thread cutting knife rest (2) and can rotate around the rotating shuttle (3) under the driving of the thread cutting knife rest (2), the cleaning piece (5) is provided with a light passing space (51) through which light rays (41) of the photoelectric sensor (4) can pass when being emitted into the rotating shuttle (3), the cleaning piece (5) comprises a first blocking part (52) positioned at the bottom and a second blocking part positioned at the side part, the side edge of the second blocking part is also provided with a third blocking part (54), the first blocking part (52), the second blocking part and the third blocking part (54) are jointly enclosed to form the light passing space (51), and one side of the second blocking part faces the light passing space (51), and a cleaning part (55) is fixedly arranged on the other side of the second blocking part.
2. The thread cleaning device for detecting the amount of thread residue in a sewing machine according to claim 1, wherein the cleaning part (55) has a folded edge (55a) at its outer edge.
3. The thread and wool cleaning device at the bottom thread allowance detection position of the sewing machine according to claim 1, wherein a yielding groove (55b) is further formed in one side of the cleaning part (55) facing the photoelectric sensor (4); the cleaning part (55) is close to the outer peripheral surface of the rotating shuttle (3) towards the end surface of the rotating shuttle (3).
4. The thread cleaning device for the bobbin thread residue detection of the sewing machine according to claim 1, 2 or 3, wherein the cleaning member (5) is provided with a connecting part (56), the connecting part (56) is provided with a connecting hole (56a), and a connecting bolt (7) capable of being screwed on the thread cutting knife rest (2) is inserted into the connecting hole (56 a).
5. The thread and hair cleaning device for the bobbin thread residue detection part of the sewing machine according to claim 1, 2 or 3, wherein the cleaning piece (5) is integrally formed by adopting an assembled structural piece or a sheet metal stamping.
6. The thread cleaning device for the bottom thread residue detection position of the sewing machine according to claim 1, 2 or 3, characterized in that a mounting bracket (6) is fixedly arranged on the bottom plate (1), and the photoelectric sensor (4) is fixedly connected on the mounting bracket (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810548248.XA CN108754901B (en) | 2018-05-31 | 2018-05-31 | Thread and hair cleaning device at sewing machine bottom thread allowance detection position |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810548248.XA CN108754901B (en) | 2018-05-31 | 2018-05-31 | Thread and hair cleaning device at sewing machine bottom thread allowance detection position |
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| Publication Number | Publication Date |
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| CN108754901A CN108754901A (en) | 2018-11-06 |
| CN108754901B true CN108754901B (en) | 2020-12-25 |
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| CN201810548248.XA Active CN108754901B (en) | 2018-05-31 | 2018-05-31 | Thread and hair cleaning device at sewing machine bottom thread allowance detection position |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853163B (en) * | 2019-01-22 | 2021-03-12 | 杰克缝纫机股份有限公司 | Dirt detection method based on excess line detection technology |
| CN110438678B (en) * | 2019-09-04 | 2021-05-04 | 杰克缝纫机股份有限公司 | Bottom line detection thread and hair interference prevention device |
| CN110453389A (en) * | 2019-09-04 | 2019-11-15 | 杰克缝纫机股份有限公司 | Baseline detects cleaning plant |
| CN113622103B (en) * | 2021-10-12 | 2021-12-10 | 南通金梭精密机械有限公司 | Wear-resistant and thread-jamming-resistant sewing machine rotating shuttle |
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| JPS57156793A (en) * | 1981-03-24 | 1982-09-28 | Tokyo Juki Industrial Co Ltd | Detector for amount of remaining of lower cotton for sewing machine |
| JPH04164490A (en) * | 1990-10-29 | 1992-06-10 | Brother Ind Ltd | Lower thread remaining amount sensing device of sewing machine |
| KR100465132B1 (en) * | 2003-03-27 | 2005-01-13 | 윤경기 | Watch dog thread in a shuttle of sewing machine |
| EP1854914A1 (en) * | 2006-05-10 | 2007-11-14 | Fritz Gegauf AG | Device and method for monitoring objects by sewing machine |
| CN203346626U (en) * | 2013-07-02 | 2013-12-18 | 新杰克缝纫机股份有限公司 | Bottom thread monitoring device for sewing machine |
| CN107460659B (en) * | 2017-09-21 | 2019-11-12 | 杰克缝纫机股份有限公司 | A kind of cleaning structure of sewing machine |
| CN207244168U (en) * | 2017-09-21 | 2018-04-17 | 杰克缝纫机股份有限公司 | A kind of peg or spindle and bobbin thread for sewing machine allowance detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205275923U (en) * | 2015-12-17 | 2016-06-01 | 山东淄博新航实业有限责任公司 | Flush joint machine self -cleaning device |
| CN206970851U (en) * | 2017-06-28 | 2018-02-06 | 西安标准工业股份有限公司 | A kind of bobbin thread for sewing machine detection means |
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