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WO2018126331A1 - Machine à coudre dotée d'un mécanisme automatique de coupe de fil amélioré - Google Patents

Machine à coudre dotée d'un mécanisme automatique de coupe de fil amélioré Download PDF

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Publication number
WO2018126331A1
WO2018126331A1 PCT/CN2017/000008 CN2017000008W WO2018126331A1 WO 2018126331 A1 WO2018126331 A1 WO 2018126331A1 CN 2017000008 W CN2017000008 W CN 2017000008W WO 2018126331 A1 WO2018126331 A1 WO 2018126331A1
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WO
WIPO (PCT)
Prior art keywords
cutter
fixed
blade
drive shaft
sewing
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.)
Ceased
Application number
PCT/CN2017/000008
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English (en)
Chinese (zh)
Inventor
肖修锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/CN2017/000008 priority Critical patent/WO2018126331A1/fr
Publication of WO2018126331A1 publication Critical patent/WO2018126331A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms

Definitions

  • the invention relates to the technical field of industrial sewing machines, and in particular to a sewing machine for improving an automatic thread cutting mechanism.
  • the industrial sewing machine (commonly known as the sewing machine) is provided with a sewing arm protruding above the panel, and the upper part of the sewing arm is provided with a rotary hook seat and a thread cutting device, such as the patent number "ZL200910048135.4", and the patent name is "one.
  • a cutter and a fixed blade are mounted above the rotary bobbin, and the fixed blade is mounted on the left side of the cutter drive shaft, and the cutter is fixed to the cutter by the bracket
  • the right side of the drive shaft drives the cutter to rotate by the cutter drive shaft, so that the cutter can be cut and matched with the fixed blade to realize the trimming function.
  • the object of the present invention is to provide a sewing machine with improved automatic thread cutting mechanism, which has a simple structure, a smaller sewing arm, and is more flexible and convenient for sewing processing.
  • another object of the present invention is to provide a sewing machine with improved automatic thread cutting mechanism.
  • the sweeping cutter has higher structural strength, greater shear force, and smoother and more stable thread cutting action. Reliable, the thread trimming is more versatile.
  • a sewing machine for improving an automatic thread cutting mechanism comprises a sewing arm protruding above a needle car panel, a fixed sewing cover is fixed on a left upper part of the sewing arm, and a sweeping cutter is arranged in the sewing arm, the vehicle is provided
  • the outward side of the arm is set to the left side, and the inside of the sewing arm is respectively rotatably mounted with a rotary drive shaft and a cutter drive shaft.
  • the cutter drive shaft is set on the outer edge of the rotary drive shaft, and the rotary drive shaft
  • the top of the top is provided with a rotary hook seat for placing the rotary hook
  • the top panel of the fixed sewing cover is a needle plate, and the bottom surface of the needle plate is fixed with a fixed blade
  • the movable space of the cutter is arranged below the needle plate, and the movable space of the cutter is located
  • the sweeping cutter is fixed to the cutter drive shaft, the sweeping cutter is disposed in the cutter movable space, and the upper portion of the sweeping cutter is provided with the cutter body
  • the sweeping cutter moves back and forth in the movable space of the cutter below the fixed sewing cover, and the cutter body of the sweeping cutter is cut-fitted with the fixed blade.
  • the sewing machine is provided with a rotary hook drive mechanism and a driving mechanism for driving the cutter drive shaft at a fixed angle reciprocating rotary cutter, and the rotary hook drive mechanism is connected to the rotary hook drive shaft, and the cutter drive mechanism Connecting the cutter drive shaft, the cutter drive shaft drives the sweeping cutter to reciprocate once along the arc path in the movable space of the cutter during a trimming process;
  • the bottom surface of the needle plate has an arc groove.
  • the fixed blade is fixed in the arc groove, and the fixed blade is located at one end of the arc groove. In the initial state, the fixed blade and the cutter body are respectively located at two ends of the arc groove, and the cutter body is in the arc groove when the wire is trimmed Move along the curved path toward the stationary blade and shear fit with the stationary blade.
  • the needle plate is provided with a lower pinhole, the lower pinhole penetrating downwardly through the arcuate groove, and the lower pinhole is located at a middle position of the arcuate groove; in the initial state, the blade body and Solid The fixed blades are respectively located at two sides below the lower pinhole; when the blade body and the fixed blade are shear-fitted, the blade body and the fixed blade are overlapped in the arc groove; the right upper part of the sewing arm is coupled with a turnable The movable sewing cover opened or removed, the fixed sewing cover and the movable sewing cover are assembled to cover the upper part of the sewing arm; the cutter driving shaft is disposed at a position right below the fixed sewing cover.
  • the sweeping cutter comprises a fixed portion, a support plate and the cutter body, and the top of the fixed portion is bent upward to extend out of the support plate, and the upper end portion of the support plate faces the inner side. The direction is laterally bent out of the cutter body;
  • the cutter drive shaft is fixed with a jacket, and the fixing portion is fixed to the jacket.
  • the cutter body reciprocates in an annular region of the outer edge of the cutter drive shaft.
  • one end of the cutter body facing the fixed blade is a front end portion, and a front end portion of the cutter body is formed with an inclined or curved oblique hook line portion, and a top surface of the cutter body is provided with a crimping groove and a pressing line.
  • the outer end portion of the groove extends outwardly and penetrates to the oblique hook line portion for hooking the line to be cut during the process of sweeping the fixed blade, and the inner end portion of the pressure line groove is provided with a trimming matching hole
  • the trimming fit hole penetrates the cutter body, and the top edge of the trimming fit hole is disposed as a cutting edge, and the fixed blade is formed with a shearing portion, a shearing portion and a shearing portion toward a bottom edge of one side of the cutter body Cutting edge cut fit.
  • a crimping piece is disposed in the arcuate groove, and the crimping piece is fixed under the fixed blade, and a pressing piece elastic piece is bent downward in the middle of the pressing piece, and the cutting body and the fixed body are fixed.
  • the end portion of the pressing elastic piece elastically abuts against the crimping groove for pressing the wire to be cut against the groove bottom of the crimping groove.
  • the side of the oblique hook line portion facing the cutter drive shaft is an inner portion
  • the side connected to the support plate is an outer portion
  • the inner portion of the oblique hook line portion is formed as A pointed portion
  • an outer portion of the oblique hook line portion is formed with an arc-shaped retaining wire portion, and the tip portion protrudes forward.
  • the upper and lower ends of the curved retaining wire portion respectively penetrate the cutter body
  • the first side of the curved retaining line portion is tangent to the oblique hook line portion
  • the second side is tangent to the support plate
  • the shearing portion protrudes at the bottom edge of the cutter body, and the shearing portion faces the knife
  • the end surface of the body is a vertical plane
  • the bottom surface of the shearing portion is a curved surface.
  • the support plate is a curved panel, and the curved panel has a curved concave surface, the curved concave surface of the support plate faces the cutter drive shaft, and the cutter body is located at the top of the curved concave surface of the support plate.
  • a side of the support plate facing away from the fixed blade is provided with a wing plate, and the wing plate is an arc-shaped panel extending outward from the rear end portion of the blade body, and the top of the wing plate
  • the top surface of the blade is flush with the top surface of the blade body; the inner surface of the wing plate is formed with a concave and convex portion, and the thickness of the lower portion of the extension plate is greater than the thickness of the upper portion.
  • the invention Compared with the prior art, the invention has the advantages that the structure of the invention is simple, the volume of the sewing arm is smaller, and the sewing process is more flexible and convenient.
  • the sweeping cutter of the present invention has higher structural strength, greater shearing force, smoother, more stable and reliable thread cutting action, and more stringent trimming.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 2 is a schematic view showing the structure of another aspect of the present invention.
  • Fig. 3 is a schematic view showing the structure of the sweeping cutter and the fixed blade of the present invention in an initial state.
  • Fig. 4 is a schematic view showing the structure of the sweeping cutter of the present invention when it is swept toward the fixed blade.
  • Fig. 5 is a schematic view showing the structure of a sweeping cutter of the present invention.
  • Figure 6 is a plan view of a sweeping cutter of the present invention.
  • Sweeping cutter 10 cutting edge 11, cutter body 12, fixing portion 13, support plate 14, installation The hole 15, the oblique hook line portion 16, the crimping groove 17, the trimming fitting hole 18, the curved retaining wire portion 19, and the flap.
  • a sewing machine for improving an automatic thread cutting mechanism includes a sewing arm protruding from a needle car panel, and a sweeping cutter 1 is disposed in the sewing arm, and the upper left side of the sewing arm
  • a fixed sewing cover 3 is fixed to the fixed part, and the outward side of the sewing arm is set to the left side, and the inside of the sewing arm is respectively rotatably mounted with the rotary drive shaft 5 and the cutter drive shaft 2, and the cutter drive shaft 2 is set.
  • the cutter drive shaft 2 is mounted coaxially with the rotary shuttle drive shaft 5, and the cutter drive shaft 2 and the shuttle drive shaft 5 do not interfere with each other, and each rotates independently.
  • the sewing arm is fixed in a plurality of bearing seats, and the cutter driving shaft 2 and the hook driving shaft 5 are respectively rotatably mounted on the corresponding bearing seats, and the outer edge of the cutter driving shaft 2 is further mounted with a fixed shaft and/or a protective sleeve.
  • the top of the rotary drive shaft 5 is provided with a rotary hook seat for placing the rotary hook, and the right upper upper portion of the sewing arm is fastened with a movable sewing cover which can be opened or removed, and the fixed sewing cover 3 and the movable sewing cover are left and right.
  • the upper part of the sewing arm is assembled and assembled; the cutter driving shaft 2 is disposed at a position right below the fixed sewing cover 3.
  • the slat arm, the hook support and the movable sewn cover are not shown.
  • the sewing machine is provided with a rotary hook drive mechanism and a driving mechanism for driving the cutter drive shaft 2 at a fixed angle reciprocating rotary cutter, the rotary hook drive mechanism is connected with the rotary drive shaft 5, and the cutter drive mechanism is connected to the cutter drive shaft 2, and the cutter drive The mechanism connects the lower end of the cutter drive shaft 2.
  • the cutter drive mechanism can be electromagnetically driven
  • the mechanism or the motor drive mechanism may also be a drive mechanism that is driven and connected by the transmission mechanism of the sewing machine, as long as the function of driving the cutter drive shaft 2 to rotate at a fixed angle and reciprocating once during the trimming is realized, that is, in one trimming process
  • the cutter drive shaft 2 drives the sweeping cutter 1 to swipe back and forth along the curved path in the cutter movable space.
  • the hook drive mechanism and the cutter drive mechanism are not shown.
  • the top panel of the fixed sewing cover 3 has a needle plate 33, and the bottom surface of the needle plate 33 is fixed with a fixed blade 4; under the needle plate 33, a cutter movable space is arranged, and the movable space of the cutter is located at the fixed sewing cover 3
  • the sweeping cutter 1 is fixed to the cutter drive shaft 2
  • the sweeping cutter 1 is disposed in the cutter movable space, and the upper portion of the sweeping cutter 1 is provided with the cutter body 11; in a trimming process, the sweeping cutter 1 moves back and forth once in the cutter movable space below the fixed sewing cover 3, and the cutter body 11 of the sweeping cutter 1 is shear-fitted with the fixed blade 4.
  • the invention changes the sweeping cutter 1 from the right side of the cutter drive shaft 2 to the left side of the cutter drive shaft 2, further reducing the volume of the sewing arm, and the head of the sewing arm is smaller in size.
  • the toe provided on the sewing arm has more turning space, and the toe can be rotated more flexibly during sewing without being disturbed and blocked by the sewing arm, so that the quality can be sewn and the processing efficiency can be improved.
  • the bottom surface of the needle plate 33 defines an arcuate groove 32.
  • the fixed blade 4 is fixed in the arcuate groove 32.
  • the fixed blade 4 is located at one end of the arcuate groove 32.
  • the fixed blade 4 and the blade body 11 are respectively located in an arc shape.
  • the cutter body 11 moves in the arcuate groove 32 along the curved path toward the fixed blade 4 and is shear-fitted with the fixed blade 4 at the time of thread trimming.
  • the needle plate 33 is provided with a lower pinhole 31 which penetrates the arcuate groove 32 downwardly, and the lower pinhole 31 is located at a middle position of the arcuate groove 32; in the initial state, the blade body 11 and the fixed blade 4 are respectively located The two sides below the lower pinhole 31; when the blade body 11 is shear-fitted with the fixed blade 4, the blade body 11 and the fixed blade 4 are vertically overlapped in the arcuate groove 32.
  • the sweeping cutter 1 includes a fixed portion 12 integrally coupled to the support plate 13 and the blade body 11.
  • the top of the fixing portion 12 is bent upward to extend out of the support plate 13, and the upper end portion of the support plate 13 is oriented inwardly
  • the cutter body 11 is bent out; the cutter drive shaft 2 is fixed by a screw to the jacket 21, and the fixing portion 12 is fixed to the jacket 21 by screwing.
  • the cutter drive shaft 2 rotates back and forth, the cutter body 11 is in the cutter.
  • the circular motion of the outer edge of the drive shaft 2 reciprocates.
  • the volume of the entire sweeping cutter 1 is made smaller, the sweeping cutter 1 is more compact, and the sweeping cutter 1 is located in the annular region of the outer edge of the cutter drive shaft 2, following the cutter drive shaft 2 rotation. , to achieve the trimming action.
  • One end of the blade body 11 facing the fixed blade 4 is a front end portion, and a front end portion of the blade body 11 is formed with an inclined or curved oblique hook line portion 15.
  • the top surface of the blade body 11 defines a crimping groove 16 and a crimping groove 16
  • the outer end portion extends outwardly and penetrates the oblique hook line portion 15 for hooking the line to be cut during the sweeping of the fixed blade 4, and the inner end portion of the crimping groove 16 is provided with a trimming line.
  • the trimming matching hole 17 penetrates the blade body 11, the top edge of the wire trimming hole 17 is provided as a cutting edge 10, and the cutting edge of the fixed blade 4 toward the side of the blade body 11 is formed with a cutting portion 41.
  • the shearing portion 41 is shear-fitted with the cutting edge 10.
  • the specially designed cutter body 11 has a smaller shape, a larger shear force, and can improve the stability and reliability of the trimming action, and the trimming line is more versatile.
  • a crimping piece 6 is disposed in the arcuate groove 32.
  • the crimping piece 6 is fixed under the fixed blade 4.
  • the middle part of the crimping piece 6 is bent downwardly to form a pressing wire elastic piece 61, and the cutting body 11 and the fixed blade 4 are cut and matched.
  • the end portion of the press-line elastic piece 61 elastically abuts against the crimping groove 16 for pressing the wire to be cut on the bottom of the groove of the crimping groove 16, and pressing the wire during trimming to improve the stability of the trimming line. And can keep the thread head a certain margin.
  • the side of the oblique hook line portion 15 facing the cutter drive shaft 2 is an inner portion
  • the side connected to the support plate 13 is an outer portion
  • the inner portion of the oblique hook line portion 15 is formed as a tip portion
  • a diagonal hook line The outer portion of the portion 15 is formed with an arcuate retaining wire portion 18, the tip portion of which protrudes forward.
  • the upper and lower ends of the curved retaining wire portion 18 respectively penetrate the upper and lower surfaces of the cutter body 11, the first side of the curved retaining wire portion 18 is tangent to the oblique hook line portion 15, and the second side is tangent to the support plate 13;
  • the cut portion 41 protrudes from the bottom edge of the cutter body 11, the shearing portion 41 faces the end surface of the cutter body 11 as a vertical plane, and the bottom surface of the shearing portion 41 is a curved surface, which has an automatic sharpening function.
  • the shearing portion 41 is kept in a sharp state for a long period of time.
  • the support plate 13 is an arcuate panel having an arcuate concave surface, the arcuate concave surface of the support plate 13 is directed toward the cutter drive shaft 2, and the cutter body 11 is located at the top of the arcuate concave surface of the support plate 13.
  • a side of the support plate 13 facing away from the fixed blade 4 is provided with a wing plate 19 which is an arc-shaped panel extending outward from the rear end portion of the blade body 11, the top of the wing plate 19 and the top of the blade body 11.
  • the surface is flush; the inner surface of the flap 19 is formed with a concave-convex portion, and the thickness of the lower portion of the extension plate is greater than the thickness of the upper portion.
  • the specially designed wing plate 19 can effectively improve the structural strength of the sweeping cutter 1 while avoiding the shaking or shaking of the sweeping cutter 1 during the sweeping process and the trimming process, thereby improving the stability and reliability of the trimming process. Sex.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

L'invention concerne une machine à coudre dotée d'un mécanisme automatique de coupe de fil amélioré. Un côté orienté vers l'extérieur d'un bras de piqûre est défini en tant que côté gauche. Un arbre de transmission à crochet rotatif (5) et un arbre d'entraînement de lame de coupe (2) sont installés rotatifs dans une partie interne du bras de piqûre. L'arbre d'entraînement de lame de coupe (2) est emmanché sur l'arbre de transmission à crochet rotatif (5). Une base de crochet rotatif destinée à recevoir un crochet rotatif est disposée au niveau d'une partie supérieure de l'arbre de transmission à crochet rotatif (5). Une plaque supérieure d'une protection de piqûre fixe (3) est dotée d'une plaque d'aiguille (33). Une lame fixe (4) est fixée à une face inférieure de la plaque d'aiguille (33). Un espace de déplacement de lame de coupe est disposé au-dessous de la plaque d'aiguille (33), et est situé entre une paroi latérale de la protection de piqûre fixe (3) et l'arbre d'entraînement de lame de coupe (2). Une lame de coupe et de raclage (1) est fixée à l'arbre d'entraînement de lame de coupe (2), et est disposée au niveau de l'espace de déplacement de lame de coupe. Un élément lame (11) est disposé au niveau d'une partie supérieure de la lame de coupe et de raclage (1). Dans un processus de coupe de fil, la lame de coupe et de raclage (1) effectue un déplacement en va-et-vient dans l'espace de déplacement de lame de coupe au-dessous de la protection de piqûre fixe (3). L'élément lame (11) de la lame de coupe et de raclage (1) coopère avec la lame fixe (4) pour effectuer une opération de coupe. La présente invention permet une structure simple, et une taille compacte du bras de piqûre, ce qui permet d'obtenir une flexibilité et une commodité supérieures pendant un processus de couture. De plus, la lame de coupe et de raclage (1) a une résistance structurale élevée, fournit une importante force de coupe, et permet une coupe de fil lisse, nette et fiable, facilitant ainsi la manœuvre de coupe de fil.
PCT/CN2017/000008 2017-01-03 2017-01-03 Machine à coudre dotée d'un mécanisme automatique de coupe de fil amélioré Ceased WO2018126331A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/000008 WO2018126331A1 (fr) 2017-01-03 2017-01-03 Machine à coudre dotée d'un mécanisme automatique de coupe de fil amélioré

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/000008 WO2018126331A1 (fr) 2017-01-03 2017-01-03 Machine à coudre dotée d'un mécanisme automatique de coupe de fil amélioré

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WO2018126331A1 true WO2018126331A1 (fr) 2018-07-12

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110373828A (zh) * 2019-08-28 2019-10-25 周富前 剪线带底线抓线一体装置及缝纫机
CN112195575A (zh) * 2020-10-31 2021-01-08 温州世邦缝制设备有限公司 一种罗拉车
CN114000275A (zh) * 2021-11-30 2022-02-01 浙江越隆缝制设备有限公司 一种刺绣机梭箱体的剪线方法
CN114575065A (zh) * 2020-11-30 2022-06-03 琦星智能科技股份有限公司 一种缝纫机的剪线机构
CN115161902A (zh) * 2022-05-31 2022-10-11 苏州日和缝制设备有限公司 一种针板组件
CN117230593A (zh) * 2023-09-25 2023-12-15 飞跃时代(浙江)科技有限公司 一种用于刺绣机的剪线结构

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US4165700A (en) * 1978-10-30 1979-08-28 Union Special Corporation Thread separating finger
CN1483884A (zh) * 2002-09-18 2004-03-24 高林股份有限公司 摇臂式勾针自动切线机构
CN101634087A (zh) * 2009-06-06 2010-01-27 浙江新杰克缝纫机股份有限公司 一种缝纫机的剪线抬压脚双电机驱动结构
CN101634086A (zh) * 2009-06-06 2010-01-27 浙江新杰克缝纫机股份有限公司 一种缝纫机的新型剪线抬压脚驱动结构
CN101845722A (zh) * 2009-03-24 2010-09-29 启翔针车（上海）有限公司 一种缝纫机的自动切线装置
CN102505371A (zh) * 2011-10-11 2012-06-20 中捷缝纫机股份有限公司 自动开袋平缝机的中心切刀机构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165700A (en) * 1978-10-30 1979-08-28 Union Special Corporation Thread separating finger
CN1483884A (zh) * 2002-09-18 2004-03-24 高林股份有限公司 摇臂式勾针自动切线机构
CN101845722A (zh) * 2009-03-24 2010-09-29 启翔针车（上海）有限公司 一种缝纫机的自动切线装置
CN101634087A (zh) * 2009-06-06 2010-01-27 浙江新杰克缝纫机股份有限公司 一种缝纫机的剪线抬压脚双电机驱动结构
CN101634086A (zh) * 2009-06-06 2010-01-27 浙江新杰克缝纫机股份有限公司 一种缝纫机的新型剪线抬压脚驱动结构
CN102505371A (zh) * 2011-10-11 2012-06-20 中捷缝纫机股份有限公司 自动开袋平缝机的中心切刀机构

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110373828A (zh) * 2019-08-28 2019-10-25 周富前 剪线带底线抓线一体装置及缝纫机
CN112195575A (zh) * 2020-10-31 2021-01-08 温州世邦缝制设备有限公司 一种罗拉车
CN114575065A (zh) * 2020-11-30 2022-06-03 琦星智能科技股份有限公司 一种缝纫机的剪线机构
CN114000275A (zh) * 2021-11-30 2022-02-01 浙江越隆缝制设备有限公司 一种刺绣机梭箱体的剪线方法
CN114000275B (zh) * 2021-11-30 2022-11-11 浙江越隆缝制设备有限公司 一种刺绣机梭箱体的剪线方法
CN115161902A (zh) * 2022-05-31 2022-10-11 苏州日和缝制设备有限公司 一种针板组件
CN117230593A (zh) * 2023-09-25 2023-12-15 飞跃时代(浙江)科技有限公司 一种用于刺绣机的剪线结构

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