CN112941742B - Double-needle chain needle position mechanism for reverse-handed overlock machine - Google Patents
Double-needle chain needle position mechanism for reverse-handed overlock machine Download PDFInfo
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- CN112941742B CN112941742B CN202110124056.8A CN202110124056A CN112941742B CN 112941742 B CN112941742 B CN 112941742B CN 202110124056 A CN202110124056 A CN 202110124056A CN 112941742 B CN112941742 B CN 112941742B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/02—Devices for fastening needles to needle bars
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Abstract
The invention relates to the field of sewing machines, and discloses a double-needle chain needle position mechanism for a backhand serger.
Description
Technical Field
The invention relates to the field of sewing machines, in particular to a double-needle chain needle position mechanism for a reverse overlock machine.
Background
The overlock machine is a sewing machine used for overlock in the process of producing clothes, the overlock is also called serging, in the process of producing textiles, because the materials used by terylene and the like are generally synthetic fibers, the texture of the synthetic fibers is relatively hard, and after cutting, the silk threads at the side seams of the clothes can be scattered, so the overlock is needed to be overlock;
overlock and the looper and mutually support the completion, overlock machine's needle type exists double needle and four needles etc. and the needle is after long-time the use, and the crooked condition can appear, then need change the needle, at the in-process of changing the needle, to the overlock machine of double needle, is difficult to ensure the relative position between two needles for when the needle after the change reuses, damage again very fast.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a double-needle chain needle position mechanism for a backhand serger, which is used for ensuring the position between two needles.
In order to achieve the purpose, the invention provides the following technical scheme: the double-needle chain needle position mechanism for the back-stitch serger comprises a needle bar, a looper shaft, a needle plate and a presser foot, wherein a fixing part, a first needle and a second needle are arranged on the needle bar, the fixing part is used for fixedly connecting the first needle and the second needle on the needle bar, the first needle and the second needle are parallel to each other, the fixing part comprises a hoop and a needle chuck, the needle chuck is arranged in the needle bar and used for fixing the first needle, a groove is formed in the outer side surface of the hoop, the second needle is located in the groove, a positioning part is arranged on the needle bar and used for positioning the hoop, a first looper frame and a second looper frame are fixedly connected on the looper shaft, the first looper frame and the second looper frame respectively correspond to the first needle and the second needle, the first looper frame and the second looper frame are respectively and fixedly connected with the looper, two groups of through the needle plate and the presser foot respectively correspond to the first needle and the second needle to pass through the second needle and the second needle.
As a further improvement of the present invention, the through hole group includes a first through hole and a second through hole, the first through hole is provided on the presser foot, the second through hole is provided on the needle plate, and the first through hole and the second through hole are communicated with each other.
As a further improvement of the present invention, the distance between the first needle and the second needle includes a first distance and a second distance, the first distance is a distance between projections of the first needle and the second needle on a horizontal plane, a direction of a line connecting the first needle and the second needle on the second distance is perpendicular to a direction of a line connecting the first needle and the second needle on the first distance, and a ratio between the second distance and the first distance ranges from 10 to 20.
As a further improvement of the invention, the first needle and the second needle are both obliquely arranged, the included angle between the first needle and the horizontal plane is a horizontal included angle, and the horizontal included angle is larger than 45 degrees.
As a further improvement of the invention, the needle head of the first needle and the needle head of the second needle are positioned on the same horizontal plane.
As a further improvement of the present invention, the groove is arc-shaped, the groove includes a top end and a tail end, the top end is located above the tail end, and an inner diameter of the groove gradually decreases along a direction from the top end to the tail end.
As a further improvement of the invention, the outer side surface of the needle bar is provided with two positioning holes, the two positioning holes are arranged oppositely, the anchor ear is provided with a connecting hole, and the connecting hole corresponds to one of the positioning holes.
As a further improvement of the present invention, a distance between the needle head of the first needle and the upper surface of the presser foot is a vertical distance, and a ratio of the vertical distance to the second distance ranges from 0.7 to 1.
The invention has the beneficial effects that: according to the invention, the first needle is arranged in the needle rod through the bolt, the second needle is arranged on the groove through the hoop, and the bolt penetrates through the connecting hole and the positioning hole to determine the position of the hoop, so that the relative position of the first needle and the second needle is determined, the position error generated when the first needle and the second needle are arranged is avoided, the overlock width after sewing is consistent, and the condition that the first needle and the second needle collide with the curved needle due to position deviation in the sewing process and are damaged is also avoided.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of the positioning portion of the present invention;
FIG. 3 is an enlarged schematic view at A of FIG. 1 of the present invention;
fig. 4 is an enlarged schematic view of the invention at B in fig. 2.
Reference numerals: 1. a needle bar; 11. a positioning part; 111. positioning holes; 2. a curved needle shaft; 21. a first looper frame; 22. a second looper frame; 3. a needle plate; 4. a presser foot; 5. a fixed part; 51. hooping; 511. a groove; 512. a top end; 513. a terminal end; 514. connecting holes; 6. a first needle; 7. a second needle; 8. bending a needle; 9. a group of through holes; 91. a first through hole; 92. a second via.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1 to 4, a double-needle chain needle position mechanism for a backhand serger of the present embodiment includes a needle bar 1, a looper shaft 2, a needle plate 3 and a presser foot 4, the needle bar 1 is provided with a fixing portion 5, a first needle 6 and a second needle 7, the fixing portion 5 is used for fixedly connecting the first needle 6 and the second needle 7 to the needle bar 1, the fixing portion 5 includes a hollow hoop 51 and a needle holder (not shown), the needle bar 1 is disposed in the needle bar 1 for fixing the first needle 6, the hoop 51 is provided with a groove 511 on an outer side surface thereof, the second needle 7 is disposed in the groove 511, the needle bar 1 is provided with a positioning portion 11, the positioning portion 11 is used for positioning the hoop 51, the second needle 7 is fixed in the groove 511, the groove 511 is arc-shaped, the groove 511 includes a top end 512 and a tail end 513, the top end 512 is disposed above the tail end 513, an inner diameter of the groove 511 gradually decreases along a direction from the top end 512 to the tail end 513, the shape of the second needle 7 is adapted, the second needle 7 is convenient to install, in general, a protrusion is arranged on the needle body, the groove 511 is matched with the protrusion, the outer side surface of the needle rod 1 is provided with two positioning holes 111, the two positioning holes 111 are arranged oppositely, the anchor ear 51 is provided with a connecting hole 514, the connecting hole 514 corresponds to one positioning hole 111, one bolt penetrates through the connecting hole 514 to position the anchor ear 51, the position of the anchor ear 51 on the needle rod 1 is ensured, so that the position of the second needle 7 is determined, the position relation between the first needle 6 and the second needle 7 cannot be deviated, the position deviation caused by installation is avoided, the first needle 6 is parallel to the second needle 7, the needle head of the first needle 6 is positioned on the same horizontal plane as the needle head of the second needle 7, so that the first needle 6 and the second needle 7 move towards the through hole group 9, the moving distances of the looper and the presser foot are equal, the installation of the looper 8 is convenient, a stitch can be formed on a fabric at the same time, the sewing is convenient, a first looper frame 21 and a second looper frame 22 are fixedly connected to the looper shaft 2, the first looper frame 21 and the second looper frame 22 correspond to a first needle 6 and a second needle 7 respectively, the first looper frame 21 and the second looper frame 22 are fixedly connected with the looper 8 respectively, the first needle 6 and the second needle 7 correspond to one looper 8 respectively, the looper cooperates with the looper 8 to form a binding edge during sewing, two groups of through holes 9 are formed between the needle plate 3 and the presser foot 4 and correspond to the first needle 6 and the second needle 7 respectively so that the first needle 6 and the second needle 7 can pass through, the through holes 9 comprise a first through hole 91 and a second through hole 92, the first through hole 91 is formed in the presser foot 4, the second through hole 92 is formed in the needle plate 3, the first through hole 91 is communicated with the second through hole 92, the first through hole 6 and the second needle 7 correspond to the first through hole 91 and the second through hole 92, the second through hole 9, the second through hole 91 and the second through hole 92 respectively, and the sewing needle 8 are matched with the first through hole 92, and then the sewing is formed in the presser foot 8.
Referring to fig. 1, 2 and 3, a distance between the first needle 6 and the second needle 7 includes a first distance and a second distance, the first distance is a distance between projections of the first needle 6 and the second needle 7 on a horizontal plane, a direction of a connecting line between the first needle 6 and the second needle 7 at the second distance and a direction of a connecting line at the first distance are perpendicular to each other, a ratio between the second distance and the first distance ranges from 10 to 20, so that it is ensured that a sewing thread between the first needle 6 and the second needle 7 does not cross, and it is ensured that when the first needle 6 and the second needle 7 are overlooked, if the ratio between the second distance and the first distance ranges from 10, the first distance is smaller, the second distance is smaller, and the sewing error occurs because the sewing thread is not completely tightened by the corresponding curved needle 8 on the second needle 7 during sewing.
Referring to fig. 1, 2 and 3, the first needle 6 and the second needle 7 are both arranged obliquely, the included angle between the first needle 6 and the horizontal plane is a horizontal included angle, the horizontal included angle is greater than 45 degrees, and the smaller the oblique angle is, the longer the distance between the first needle 6 and the second needle 7 moving towards the through hole group 9 is, so that the sewing efficiency is reduced, and the horizontal included angle may be 60 degrees.
Referring to fig. 1, 2 and 3, the distance between the needle head of the first needle 6 and the upper surface of the presser foot 4 is a vertical distance, the ratio of the vertical distance to the second distance is in the range of 0.7 to 1, the vertical distance is determined according to the second distance, the smaller the overlock width is, the shorter the distance between the first needle 6 and the second needle 7 which move up and down is required to be, and the distance between the first needle 6 and the second needle 7 which move up and down is reduced in the moving process of the looper 8 to reduce the overlock width, so that the complete moving distance of the first needle 6 and the second needle 7 is controlled.
The working principle is as follows: the first needle 6 is mounted in the needle bar 1 through the needle holder, the second needle 7 is mounted on the groove 511 through the anchor ear 51, and the anchor ear 51 is positioned by passing a bolt through the coupling hole 514 and the positioning hole 111, thereby determining the relative position of the first needle 6 and the second needle 7.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The utility model provides a two-needle chain needle position mechanism for backhand serger, includes needle bar (1), looper axle (2), faller (3) and presser foot (4), its characterized in that: the needle bar (1) is provided with a fixing part (5), a first needle (6) and a second needle (7), the fixing part (5) is used for fixedly connecting the first needle (6) and the second needle (7) on the needle bar (1), the first needle (6) and the second needle (7) are parallel to each other, the fixing part (5) comprises a hoop (51) and a needle chuck, the needle chuck is arranged in the needle bar (1) and used for fixing the first needle (6), the outer side surface of the hoop (51) is provided with a groove (511), the second needle (7) is positioned in the groove (511), the needle bar (1) is provided with a positioning part (11), the positioning part (11) is used for positioning the hoop (51), the looper shaft (2) is fixedly connected with a first looper frame (21) and a second looper frame (22), the first looper frame (21) and the second looper frame (22) respectively correspond to the first needle punch hole (6) and the second punch hole (7), the second needle frame (7) and the presser foot (4) are respectively connected with the first punch pin frame (7) and the second punch pin frame (7), so that the first needle (6) and the second needle (7) can pass through.
2. The double-needle chain needle position mechanism for the backhand overlock machine according to claim 1, characterized in that: the through hole group (9) comprises a first through hole (91) and a second through hole (92), the first through hole (91) is formed in the presser foot (4), the second through hole (92) is formed in the needle plate (3), and the first through hole (91) is communicated with the second through hole (92).
3. The double-needle chain needle position mechanism for the backhand serger of claim 2, characterized in that: the distance between the first needle (6) and the second needle (7) comprises a first distance and a second distance, the first distance is the distance between the projections of the first needle (6) and the second needle (7) on the horizontal plane, the direction of the line of the first needle (6) and the second needle (7) on the second distance is perpendicular to the direction of the line of the first needle on the first distance, and the ratio range between the second distance and the first distance is 10-20.
4. The double-needle chain needle position mechanism for the backhand overlock machine according to claim 3, characterized in that: the first needle (6) and the second needle (7) are arranged obliquely, and an included angle between the first needle (6) and the horizontal plane is a horizontal included angle which is larger than 45 degrees.
5. The double-needle chain needle position mechanism for the backhand overlock machine according to claim 4, characterized in that: the needle head of the first needle (6) and the needle head of the second needle (7) are positioned on the same horizontal plane.
6. The double-needle chain needle position mechanism for the backhand overlock machine according to claim 5, characterized in that: the groove (511) is arc-shaped, the groove (511) comprises a top end (512) and a tail end (513), the top end (512) is positioned above the tail end (513), and the inner diameter of the groove (511) is gradually reduced along the direction from the top end (512) to the tail end (513).
7. The double-needle chain needle position mechanism for the backhand serger of claim 6, characterized in that: the positioning portion (11) comprises positioning holes (111), the outer side face of the needle rod (1) is provided with two positioning holes (111), the two positioning holes (111) are arranged oppositely, the hoop (51) is provided with a connecting hole (514), and the connecting hole (514) corresponds to one of the positioning holes (111).
8. The double-needle chain needle position mechanism for the backhand overlock machine according to claim 7, wherein: the distance between the needle head of the first needle (6) and the upper surface of the presser foot (4) is a vertical distance, and the proportion range between the vertical distance and the second distance is 0.7-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110124056.8A CN112941742B (en) | 2021-01-29 | 2021-01-29 | Double-needle chain needle position mechanism for reverse-handed overlock machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110124056.8A CN112941742B (en) | 2021-01-29 | 2021-01-29 | Double-needle chain needle position mechanism for reverse-handed overlock machine |
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| Publication Number | Publication Date |
|---|---|
| CN112941742A CN112941742A (en) | 2021-06-11 |
| CN112941742B true CN112941742B (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110124056.8A Active CN112941742B (en) | 2021-01-29 | 2021-01-29 | Double-needle chain needle position mechanism for reverse-handed overlock machine |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179395Y (en) * | 1993-12-31 | 1994-10-12 | 湖南工业缝纫机厂 | Dual-needle chain sewing machine |
| DE19518063C2 (en) * | 1995-05-17 | 1997-10-23 | Stutznaecker Emil Naehmasch | Multi-needle sewing machine |
| CN201372356Y (en) * | 2009-03-23 | 2009-12-30 | 通宇缝纫机股份有限公司 | Curve two-needle sewing machine |
| CN201729960U (en) * | 2010-06-10 | 2011-02-02 | 劲霸男装股份有限公司 | Novel sewing machine |
| CN203754979U (en) * | 2014-03-19 | 2014-08-06 | 上海宝星缝纫设备有限公司 | Straight-needle and crocheting-needle sewing structure of engineering sewing machine |
| CN108251974B (en) * | 2016-12-28 | 2020-09-18 | 启翔股份有限公司 | High-head column type multi-needle sewing machine |
| CN207104248U (en) * | 2017-08-25 | 2018-03-16 | 山东鸿诺汽车新材料股份有限公司 | Serger eedle more changing device is used in a kind of automobile cushion production |
| CN207878048U (en) * | 2017-09-25 | 2018-09-18 | 台州市椒江朗邦缝纫机有限公司 | The needle gage regulating mechanism and reversed crosspointer double-strand overedger of a kind of overedger |
| CN109385765B (en) * | 2018-10-30 | 2020-09-01 | 杰克缝纫机股份有限公司 | Wire loop stabilizing structure of flat seaming machine |
| CN212404449U (en) * | 2020-02-18 | 2021-01-26 | 拓卡奔马机电科技有限公司 | Needle protection structure of bent wrist machine |
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