TW528823B - Chainstitch sewing machine - Google Patents

Abstract

To provide a chainstitch sewing machine capable of forming a knot at an end of a chainstitch which is not frayed easily and of forming such a knot with a simpler structure. A sewing machine serves to form a chainstitch by a cooperation of a needle 6 and a rotary looper 41. Press force to be applied from a first thread tension 58 to a thread is regulated by a solenoid 64 such that the press force is not applied from the first thread tension 58 to the thread through the solenoid 64 until a first thread loop is formed and a third thread loop l00c is then pulled by a balance 8 and such that the press force is applied from the first thread tension 58 to the thread after the third thread loop l00c is pulled out.

Description

528823 A7 B7 V. Description of the invention () < Technical Field of the Invention > The present invention relates to a chain sewing machine, which is formed at the end of the chain stitch by electrical control to form a knot that is not easy to open. < Known technique > The chain stitch is formed by pulling up the thread at the end of the sewing end of the stitch, and finally it is gradually opened. In order to prevent such a sewing thread from spreading, for example, as disclosed in Japanese Patent Laid-Open Publication No. Hei 9-290081, a sewing machine that is formed by the cooperation of a needle and a hook and loop device during sewing termination is disclosed. The above-mentioned sewing machine will be briefly described with reference to Fig. 21 (A) or 23 (C). The chain sewing machine disclosed in Japanese Patent Laid-Open Publication No. Hei 9-290081 is a sewing sewing machine. For the vertical movement path of the needle, the button 506 and the cloth 505 are moved left and right, and the two holes of the button 506 interact The needle 506 is sewn on the cloth 505 by the thread 507 of the needle. Fig. 21 (A) shows the state when the needle 501 rises to the top dead center immediately after the thread is cut, and immediately after the needle is dropped 2 times before the last needle drop. Here, the needle 501 is positioned above one of the holes of the button 506, and the hook and loop device 502 catches the wire 507 to form the first coil 507a. Next, as shown in FIG. 21 (B), the needle 501 is positioned on the hole corresponding to the button 506 of the first needle drop before the last needle drop, and at the same time, the thread hanging portion 503 captures the first coil 507a by the coil. Secondly, as shown in FIG. 21 (C), after the last drop of the needle before the last drop, the hook and loop device 502 starts to capture the stitch formed by the needle 501 when it is raised (the second stitch 507b), and at the same time the thread collecting portion 504 is online. The lower part of the hanging part 503 is kept by the coil. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -------------------'... :: ¾- -------------------------- 1 --------------- 囔 (Please read the first Note: Please fill in this page again.) 4 528823 A7 B7 V. Description of the invention Hang the outside and bend the first coil 507a. Next, as shown in FIG. 22 (A), the needle 501 rises further, the thread-collecting portion 504 is separated from the first coil 507, and at the same time, the captured needle coil (second coil 507b) is rotated by the rotation of the hook and loop device 502. After the first coil 507a is pulled in, it is released by the hook and loop device 502. In this state, the wire forming the first coil 507a and the second coil 507b are hung on the wire hanging portion 503. Thereafter, as shown in FIG. 22 (B), before the last needle drop, a needle drop and the same button hole are used for the final needle drop. The thread gathering portion 504 approaches the second coil 507b on one side, and the hook loop device 502 starts. Snap to line 507 hanging on needle 501. In this state, the second coil 507b is folded back by the wire hanging portion 503 and the wire gathering portion 504, and the wire is loosened to form the second coil portion 507b. Next, as shown in Fig. 22 (C), the hook and loop device 502 passes the captured wire 507 through the second coil 507b, and at the same time, the thread-collecting portion 504 is separated from the second coil 507b. Thereafter, as shown in FIG. 23 (A), the second coil 507b is released by the hook and loop device 502, and the second coil 507b is pulled into the cloth 505. However, the first coil 507a hung on the wire hanging portion 503 before the release And the second coil 507b. Thereby, a third coil 507c is formed, and the third coil 507c passes through the second coil 507b. Next, as shown in FIG. 23 (B), the needle 501 is further raised, and the third coil 507c is further pulled down. Moreover, as shown in FIG. 23 (C), the state where one of the first coils 507a is formed is hung, the slack is maintained at a certain position, and the slack second coil is returned by the thread hanging portion 503 and the condensing portion 504. 507b, when the third coil is pulled, the third coil 507c pulls the first coil 507a, and the first coil 507a passes through the second coil 507b. Moreover, the third coil 507c is pulled down in this way, and the third coil 507c is cut by the movable knife edge 508 and the fixed knife edge 509. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm). -------------- 、 may ------------------ line (please read the precautions on the back before filling this page) 528823 A7 -^ —_-__ E__ 5. Description of the invention 3 () The knot formed as described above is shown in Figure 24 (A). The knot formed by the first coil 507a is borrowed from the second coil 5071) The knot part formed is a knot formed. When the knot shown in Fig. 24 (A) is released, the wire end 507d is pulled out by the first coil 507a. That is, a portion of the knot on the front side of the portion forming the thread end portion 507d passes through the first stitch 507a in a state of one stitch of sewing cloth 505, and the line 507 passing through the first stitch 507a is horizontally exaggerated to form the second After the coil 507b becomes the two lines of the first coil 507a (that is, the second coil 507b surrounds and concludes the first coil 507a), it is formed again through the first! Coil 507a. In this case, the part that is more advanced than the first coil 507a of the wire 507 is formed to pass through the first coil 507a twice, and at the same time, it is wound around the J-th coil 507a after passing through it once. The second pass side passes through the J-th coil 507a again on the same side. Even if the wire end portion 507d is pulled out by the first coil 507a at one time, the line end portion 507d of the borrow end portion 507a is still in a knot state and the knot is completely completed. Cannot be undone. < Problem to be solved by the invention > However, in order to form the above-mentioned knot, when the third coil 507c is pulled through the second coil 507b, the first coil 507a is dragged to the base of the third coil 507c. Side, through the second coil 507b, it is necessary to make the first coil into a state surrounded by the second coil 507b. At this time, after the slack line forms a state where the thread is not slack, even if the third coil 507c is pulled through the second coil In 507b, the first coil 507a cannot pass through the second coil 507b. Therefore, the needle 501, the hook and loop device 502, the thread hanging portion 503, and the thread gathering portion 504 are cooperatively driven for slackening the thread, but the mechanism for cooperatively driving these has become a relatively complicated structure. In addition, the paper size of China National Standard (CNS) A4 (210X297 mm) is applicable to this paper size (please read the precautions on the back before filling this page)

• Meal available • 6 The small space required for the operation of the needle and loop device 502, the thread hanging part 503, and the thread gathering part 504 is complicated. -For example, if the wire hanging portion 5G3 is omitted, since the wire cannot be loosened, as shown in the figure (1), a knot that prevents the first coil 507a from passing through the second coil 507b is formed, and a knot that can be easily deposited is formed. In addition, the knot shown in Figure 24 is equivalent to the symbols ι〇ι, ι〇7 specified in JIS_L_〇12〇,

The wire end portion 5U is only detached from the second coil 512 for the first time, and the second coil 512 is simply detached from the first coil 511, so there is a problem that the knot is simply deposited. In addition, in order to loosen the thread, even when a knot of excess supply is formed when the knot is formed, the knot itself becomes slack, and there is a problem that the so-called knot eventually becomes very easy to be blown apart. The present invention is based on the above-mentioned matters, and aims at providing a key-type sewing machine which forms a final knot which is not easy to open, and can also form such a knot with a simpler structure. < Means for solving the problem > A chain sewing machine which solves the above-mentioned problem and has a patent application scope item 丨, which forms a key stitch by working together with a rotary fishing ring device, including: a needle, a system It is used to insert the thread and make it move up and down; a rotary hook-and-loop device is used to capture the thread from the needle and form a coil by stretching the captured thread; and a thread adjustment device is an electrical control setting line The tension of the thread adjusts the slackness of the thread and loop. The thread adjusting device sets the thread tension to relax the loop when forming at least the first loop of the last needle drop. When the device forms the last needle drop loop, set the thread tension so that the loop does not loosen. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) Description of the invention <) For example, in this chain sewing machine, a thread guided by a thread adjustment device is inserted into a pinhole provided in a needle. Then, the needle is lowered, the needle penetrates the object to be sewn, and guides the thread below the object to be sewn. Moreover, the rotary hook and loop device catches the thread with this needle. Secondly, the rotary hook-and-loop device forms a coil by rotating the pull wire, and the wire is supplied by the thread adjusting device. At this time, the tension of the wire is set by the wire adjusting device, and the slack of the coil is adjusted. In addition, the needle rises and then lowers again, guides the thread to the bottom of the object to be sewn, and the rotary hook and loop device catches the thread again. Furthermore, a new coil is formed by pulling the wire, and the new coil is passed through the coil just formed. By repeating these actions, a chain stitch is formed. According to the invention according to item 1 of the scope of patent application above, the thread adjustment device sets the tension of the thread, so that the loop formed by at least the previous stitch of the last stitch is loosened, and the rotary hook-and-loop device is formed by pulling the last stitch. In the case of the coil (hereinafter referred to as the third coil), in order to set the thread tension so that the coil does not slacken, the third coil pulls the needle drop coil formed by the two needles before the drop needle (hereinafter referred to as the first coil). The pulled first coil passes through the coil formed at the last stitch (hereinafter referred to as the "second coil", so that the second coil can form a knot in the second coil. Also, to cut off the third coil, the The cut part forms the end of the wire of the knot, but when the knot is broken, even if the end of the wire is separated by the first coil, the knot cannot be completely opened because the end of the wire passes through the first coil. Therefore, even if the wire ends of the knots formed as described above are pulled by rubbing against the skin, they are not easily fragile. In addition, when the third coil is formed, in order to prevent the coil from being loosened, the wire adjusting device is provided. The thread tension is fixed, so as not to supply the 528823 ′ A7 .r--B7 ___ when the knot is formed. V. The description of the invention “” ^ — The knot itself becomes hard, so that the knot is not easy to be cracked. In addition, since the conventional thread hanging portion 503 does not loosen the thread, since only the thread adjustment device relaxes the thread, the knot described above can be formed with a very simple structure. Furthermore, since the slackness of the coil is adjusted by the electrical control of the wire adjustment device, the movable portion is reduced compared to the slackness of the coil by the mechanical control, so the reliability can be improved. Moreover, the so-called coil is in a relaxed state, which means that the thread (coil) forming a chain stitch is not pulled close to the object to be sewn, but has a gap between the object and the thread ^. • That is, the thread (coil) forming a chain stitch formed on the back side of the object to be sewn is loosened. That is, key stitches are formed which are looser than usual chain stitches. In addition, as for the invention in the second scope of the patent application, the above-mentioned thread adjusting device includes: a supply section for supplying the thread to the needle; and a thread adjustment mechanism __ for adjusting the thread from the thread supply section to the above. The thread on the path of the needle exerts pressure; and the pressure adjustment device is controlled by electricity. The above-mentioned rotary hook and loop device changes the pressure to form at least the first 1 loop of the last needle drop, and the coil is loosened, and When the above-mentioned rotary hook-and-loop device forms the last needle drop loop, the pressure is changed so that the loop is not loosened. Here, the so-called pressure regulating device is, for example, a person who regulates the pressure by the driving force of an electric driving device such as a cylindrical coil or a motor. In addition, according to the pressure adjusting device, the pressure applied to the wire by the wire adjusting member changes, the tension of the wire can be set, and the wire can be adjusted by the coil or the wire supply unit. For example, if the pressure adjustment device is used to adjust the paper by wire, the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page)-Install 丨. 、 可 | · Wire丨 9 ^ 28823 V. Description of the invention When the pressure applied to the thread by the component is close to G, the thread is drawn by the thread supply part, the coil is still loose, and the thread forming the chain stitch is not pulled near the object to be sewn. In addition, even if the pressure applied to the thread by the thread adjustment member is not close to 0 by the pressure adjustment device, when the normal chain stitch is made, the pressure is lower than the pressure applied to the thread by the thread adjustment member. The thread tension becomes lower. To form a loose coil. That is, when the at least one coil before the final needle drop is formed by the rotary fishing ring device, the thread is given pressure by the thread adjusting member as described above, so that the coil becomes slack. In addition, if the pressure applied to the thread by the thread adjusting member becomes very large by the pressure adjusting device, the thread is pulled by the coil (chain stitch) without loosening the coil, and the thread is pulled close to the object to be sewn. That is, when the rotary pin loop device is used to form the last stitch, the pressure is stronger than when the rotary hook ring device is used to form at least the front-loop of the last needle. At the time of stitching, the thread adjustment member gives a strong pressure to the thread), and the thread adjustment member gives H to the coil (chain stitch to pull the thread strongly), so that the coil formed by the last needle drop does not relax. Moreover, the waste force given to the thread by the entire member becomes larger, and the tension of the thread becomes A, while the pressure applied to the thread by the thread adjustment member becomes smaller, and the tension of the thread also becomes smaller. As described above, according to the invention in the second scope of the patent application, when the coil formed by the last stitch before the last stitch is recorded, and the third coil is recorded, the coil is adjusted by the pressure adjustment device to adjust by the pressure adjustment device. The pressure given by the component to the wire 'the third coil pulls the i-th coil. In order to penetrate the second coil, the i-th coil can form a knot formed by the second coil. In addition, the invention of the third scope of the patent application is the chain stitch sewing machine of the second scope of the patent application, in which the above-mentioned thread adjustment device has a second thread adjustment circumference ----------- ----------- Double—— (Please read the precautions on the back before filling in this page) • 、 may | ΛΜ, this paper size applies Chinese National Standard (CNS) A4 specification (21〇X297 Mm) 10 528823

五 、 发明 描述 # The component is used to apply pressure to the thread on the path from the thread supply section to the needle, and the needle is raised only from the first needle drop to the last needle drop by the second thread. The adjustment member applies pressure to the thread to relax the coil formed from the first needle drop to the last front needle drop, and the needle rises to the last needle drop, so that the pressure adjusting device is raised to the pressure applied to the thread by the thread adjustment member. By applying pressure to the thread by the thread adjusting member and the second thread adjusting member, the stitch where the needle is dropped last is not loosened. According to the invention in item 3 of the above-mentioned patent application, the coil is formed in a relaxed state from the coil formed by the initial needle drop to the formation of the second coil, and when the wire forming the third coil is pulled, in order to make the coil Without slack, the third coil pulls the first coil to form the first coil through the second coil. Thereby, the first coil can form a knot formed by the second coil. In addition, in order to prevent the coil from being loosened when the third coil wire is drawn, the knot itself is hardened so that the knot is not easily frayed. In addition, the invention in the fourth scope of the patent application is the chain sewing machine in the second scope of the patent application, in which the thread adjustment device has a second thread adjustment member for routing the path from the thread supply unit to the needle. The thread is applied with pressure; and after the needle is initially dropped to between the needle drop and the last front 1 needle drop, the thread adjustment member and the second thread adjustment member apply pressure to the thread so that The loop before the last two needle drops is not slack; and between the time when the needle drops from the last one before the needle drop and the needle rises to the last needle drop, 'the pressure adjusting device reduces the pressure given to the thread by the thread adjusting member, so that The loop formed at the last front 1 needle drop is loose; and, after the needle is raised to the last needle drop, the above pressure adjustment device is raised by the above-mentioned thread adjustment member. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297). ... installation ..., opening ......... (Please read the note on the back first Please fill in this page again) 11 528823 A7 —----- B7___ V. Description of Invention i) " " The line pressure adjusting member and the second member is adjusted by the line pressure applied to the wire lines, so that the last coil of the needle drop does not go slack. ! ----- (Please read the precautions on the back before filling in this page) According to the invention in the scope of patent application No. 4 above, starting from the last needle before the last needle drop to the last needle after the last needle drop In order to reduce the pressure applied to the wire by the wire adjusting member until the pressure is increased, the second coil is in a relaxed state. Furthermore, when the wire forming the third coil is pulled, in order not to loosen the coil, the third coil pulls the first coil and passes the first coil through the second coil. Thereby, the first coil can form a knot formed by the second coil. In addition, when the wire forming the third coil is pulled, in order not to loosen the coil, the knot itself becomes hard, so the knot cannot be easily untied. < An embodiment of the invention > [First embodiment] A mode of an embodiment of the chain sewing machine according to the present invention will be described with reference to the drawings. . Fees-Chain sewing machine as shown in Figures 1 and 2! A sewing machine frame 2 including a base portion 5, a longitudinal portion 4, and an arm portion 3 is provided. The base part 5 is provided with a horizontal base surface made of perforated shells, the longitudinal part 4 stands on the rear part of the base part 5, and the arm part 3 is formed along the upper part of the longitudinal part 4 along about the base. Section 5 extends parallel to the front. A push-up cylindrical coil 12 is provided inside the longitudinal portion 4, so that the plunger core 12a which pushes the push-up cylindrical coil 12 can be moved forward and backward. Further, at one end, which is connected to the other end of the push-up link 13 of the plunger-type core 12a, the free-rotational connection is connected to the push-up control lever 14. The middle portion of the lever 14 is supported by the arm portion 3 by rotation, and a protruding portion 14a is provided at an end portion thereof. This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210 × 297). 12 By using a telescopic spring 15 that pushes one end of the control lever 14, push the control lever U to give potential energy to be pulled forward. (Needle side) Connected to the stopper 60 ° mouth> In addition, the gripping device 10 provided on the base portion 5 is supported by a transfer table (not shown) freely swinging in the rear end portion, And set up the mouth clamp at the front end: factory. Furthermore, the gripper device 10 is provided with the potential moon b below by a telescopic spring 20 provided on the upper side, and the cloth is clamped between the Nichichi jig opening and the lower plate 11 connected to the conveying table by the supporting force. The gripping device 10 includes a hook portion 突出 protruding upward in an L-shape, and the hook portion 10a and the protruding portion 14a face each other with a gap. Moreover, by pushing up the potential energy imparted by the cylindrical coil 12, when the control lever 14 is pushed up by rotation, the protruding portion 14a is raised by engaging with the hook portion 10a, and the button jig is raised to be in contact with the lower plate 1 丨Unclamp the cloth between. In the middle, Deng Zihong is supported by the thread trimming lever 18 of the sewing machine frame, and one end of the thread trimming lever 18 is rotatably connected to the middle part of the push-up link 13. A thread trimming arm 19 supported by the sewing machine frame 2 is rotatably supported at an upper end portion, and a cam groove 19a is formed at a middle portion thereof. The cam groove 19a is engaged with an end portion of the thread trimming lever 18 (not shown). hole. One end of the connecting plate 21 extending in the front-rear direction is connected to the tangential wrist 19 'freely and the other end is connected to the tangential link 22 extending freely in the other direction. As shown in Fig. 5, the movable knife edge 23 is supported by a needle plate 24 arranged below the lower plate 11 so as to be freely rotatable, and is connected to the tangent link 22 freely. In addition, the 'fixed blade 25' is fixed to the needle plate 24. 528823 A7 ^^ ------ B7 Fifth, the invention is forced) " ~~ ^ With the above structure, after the cylindrical coil 12 is actuated, the movement of the connecting rod 13 will be followed, as before. The button jig is pushed up, and at the same time, it moves through the thread trimming lever 18, the thread trimming arm 19, and the connecting plate 21 by the thread trimming link 22 after 1J, and cuts the line according to the swing of the movable knife edge 23 and the fixed knife edge 25. With this, as the thread is cut, the button holding fixture is used to release the holding of the cloth. However, since there is a gap between the hook portion 10a and the protruding portion 14a, the button holding fixture 17 is used to release the holding operation of the cloth. It is slower than the thread cutting operation. In addition, as shown in FIG. 3, the driving pulley 27 connected to a belt 26 of a sewing machine motor (not shown) is freely rotating and extends to the left and right to be supported by the driving shaft 28. The driving shaft is driven by the clutch mechanism. 28 links, which can be rotated integrally. The blocking cam 29, the eccentric cam 30, and the lotus leaf gear 31 are fixed to the drive shaft 28. The aforementioned blocking mechanism is a well-known structure. The blocking frame 32 has a base end supported by the sewing machine frame 2 under free rotation, and is fixed to one end of the blocking shaft 35. The tip can be provided by a spring member 33. The blocking hook 34 is free to move forward and backward. The front end portion 34a of the blocking hook 34 can be locked to the cam portion 29a of the blocking cam 29. An interruption control arm 36 fixed to the other end of the interruption shaft 35 is provided with a roller 37 connected to an interruption control cam 38 described later. The rotary hook and loop device 41 is fixed to the sleeve shaft 40 at the front end, and the fixed gear is engaged with the lotus leaf gear 39 and the screw 42 of the lotus leaf gear 3 丨. As shown in FIG. 2, the rotary hook and loop device 41 is arranged below the needle plate 24 and a needle 6 described later. Screw gear 43, left and right conveyance cams 45, front and rear conveyance cams 46, and paper size standards (适) 适 4⑵⑵GX297 public love) -------- …… -91. (Please first Read the notes on the back and fill out this page) Order — -14-528823

Description of the invention: The control cam 38 is broken and fixed to a camshaft extending parallel to the interrupting shaft. The screw 42 is a toothed screw gear 43. The interrupting control cam has a wheel P38a 38b on the outer periphery, and the above-mentioned roller 37 Then, the cam portions 38a and 38b are engaged. The groove portion 45a of the right transfer cam 45 and the groove portion of the front and rear transfer cam 46 are connected to a link mechanism (not shown) connected to the gripping device 1 () described above. The shape of the grooves 45a and 46a is such that the gripping device 10 is moved forward, backward, left and right through the link mechanism. As a result, the mouthpiece 17 and the lower plate _ are moved in a horizontal direction. The button held on the button jig 17 is set to the needle drop position. In addition, the needle drive control lever 48 'which can be supported by the arm 3 and the middle portion can be rotated to fix the balance 8 and the needle bar 49 at one end. The end is rotatably supported on the upper end of the crank lever 47 connected to the eccentric cam 30. The needle 6, which is fixed to the lower end of the needle bar 49, is arranged at a position corresponding to the button clamp 17. Department of Japanese Patent Publication No. Hei 9_29〇81 The structure of the trivial matters is the same. In the simple illustration in FIG. 3, the outer cam π and the groove cam 51 are fixed to the hook and loop device shaft 40. A guide body 52 is fixed to the guide plate 52 fixed to the sewing machine frame 2 and a freely sliding support 51. The two forks provided on the lower part of the support body 53 are inserted into the outer peripheral cam 50. Furthermore, the thread-collecting portion 54 can be slidably mounted on the support body 53. The roller 56 is mounted on the freely rotatable cover. It is supported on one end of the rear wrist 55 of the sewing machine frame 2. Furthermore, the formed long hole and roller 56 are inserted into one end of the cam portion of the groove cam 51 and the thread gathering portion 54. This allows the thread gathering portion to The planar motion determined by the outer peripheral cam portion 50 and the groove cam 51. This paper size applies to China National Standard (CNS) A4 (210X297 mm)

15 V. Description of the invention l (3) The structure is exactly as described above. The needle 6, the rotary hook device 41, and the thread-collecting portion 54 operate together to form a coil. At the same time, a new coil is drilled into the coil, so that it can be used for single operation. Chain stitching. The following describes the thread adjusting device for adjusting the tension of the thread. As shown in Figs. 1, 2 and 4, the line adjusting device is composed of a line supply unit (not shown), a scale 8, a first line adjusting member 58, a second line adjusting member, a third line adjusting member 59, and a winding line. 60. The wire guides 61 to 63 and the cylindrical coil 64 are specially constructed. An end of the push-up link 13 connected to the push-up control lever 14 is connected to one end of the winding wire 60. The winding thread 60 is pulled out from the inside of the sewing machine frame 2 to the upper side of the arm portion 3, and one end portion thereof is linked with the movable knife edge by pushing on the cylindrical coil 12 and is shaken to the base. A line guide 61 extending forward and backward toward the upper portion of the arm portion 3 is provided at a position corresponding to the position before and after the winding line 60. The wire guide 61 has through holes 61 &, 61b which respectively pass through the front end portion and the rear end portion. On the upper portion of the arm portion 3, a second thread adjustment member 57 disposed behind the winding line 60 and a second line adjustment member% disposed on the front of the winding line 60 are provided. The dead point below the Libra 8 is also the third line adjustment member below. In addition, a line guide 62 is provided at the front end portion of the upper portion of the arm portion 3, and a line guide is provided near the dead point below the balance 8 that moves up and down. In addition, a thread supply unit (not shown) is provided behind the second thread adjustment member 57. The thread supplied by the thread supply unit is adjusted by the second thread adjusting member, the through hole 611 ^ of the wire guide 61, the through hole 61a of the wire guide 61, the winding wire 60, the first wire adjusting member 58, and the wire. The order of the guide 62, the thread guide 63, the balance 8 and the third thread adjustment member is guided, and finally inserted into the hole of the needle 6. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297). 528823 A7 ---- ~ _____ B7 V. Description of the invention 1 (4) ^ ~ The second line adjustment member 57 has an adjustment member disk, and through this adjustment The component disc gives a strong and weak pressing force to the thread, so that the thread between the thread supply unit and the second thread adjustment member 57 and the thread between the first thread adjustment member 58 and the third thread adjustment member ^ can adjust the tension. Furthermore, the thrust force of the cylindrical coil material can continuously change the pressing force applied to the thread by the thread adjusting member 58 during sewing. In addition, the third line adjustment member 59 is a pushing force for the line by the line, and the line between the first line adjustment member 58 and the third line adjustment member 59, and the third line adjustment member 59 and the cloth. The tension between the threads is constant by the third thread adjustment member 59. The scale 8 rises with the rise of the needle 6, but at this time, because the scale 8 is far away from the thread guide 63, the path of the thread between the thread supply section and the needle increases, and the thread is pulled apart. At this time, the pressing force of the i-th line adjusting member 58 is adjusted by the cylindrical coil 64, so that the balance § can adjust the line drawn by the above-mentioned line supply section or the needle 6. Although not shown, the sewing machine is provided with a control device for controlling the operation of the sewing machine. The control device controls the above-mentioned thread adjusting device to adjust the pushing force (tension of the thread) to the thread. The control device is composed of an unillustrated encoder, CPU (Central

Processing Unit), ROM (Read Only Memory), RAM (Randam

Access Memory) and drive transmission. The unillustrated encoder is used to detect the rotation state and output signal of the sewing machine, the ROM is used to memorize control programs and control data, the ram is used to form the operating field of the above-mentioned CPU, and the drive transmission device is used Based on the paper size of the control process, the Chinese National Standard (CNS) A4 specification (210X297 mm) is applied. ----------... Order ------------------ line. (Please read the notes on the back before filling this page) 17 528823 A7 '- ----- —_JB7_ Fifth, the description of invention 1 (5) and the control data control push up the cylindrical coil 12 and the cylindrical coil 64. After detecting the rotation state of the sewing machine by the above-mentioned encoder, the CPU grasps the up and down position of the needle 6 and the rotation position of the suspicious-type hook and loop device 41, operates the cylindrical coil 64 at a certain time, and adjusts the member 58 by the i-th thread Adjust the pushing force to the line. After this is explained in detail, the cylindrical coil 64 is driven and controlled without applying the thread pushing force to the first thread trimming member during normal sewing. Furthermore, the rotation state of the sewing machine is detected by the above-mentioned encoder, and the second thread adjusting member 57 is applied to the thread higher when the last needle drop is performed from the needle to the cutting thread during the last stitching operation of the sewing. The pushing force causes the first line adjusting member to apply pushing force to the wire. When the needle 6 is raised after the last needle drop is performed, the cylindrical coil material is controlled by the coil driving, so that the i-th thread adjusting member 58 applies a pushing force to suspend the stitch. Next, the operation of the stitch sewing machine 1 will be described with the above structure. After stepping on the start control lever (not shown), the blocking frame 32 is rotated in the direction to release the engagement of the blocking hook 34 and the cam portion 29a, and the driving pulley 27 and the driving shaft 28 are connected by the blocking mechanism described above. And start spinning in the direction of b. By the action of the eccentric cam 30, the needle driving control lever 48 is rocked by the crank lever 47, and the needle bar 49 and the balance 8 move up and down. In addition, the needle 6 moves up and down, and the women's rotation in the D direction of the rotary hook and loop device 41 at the tip of the hook and loop device shaft 40 further advances the coordination of the movement of the gathering portion 54 to form a single chain. formula. That is, by this action, the paper size of the left and right transfer cams 45 and the front and back transfers are applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) —.———— (Please read the precautions on the back before filling in this page)

， 可 I. Fei -18 52 Tart 23 A7, Description of the invention < 6 Rotation of the cam 46, according to the action of the button clamp, the button holes of the needle 6 on the cloth fall into the button holes in a certain order to form Single chain. After the roller 37 is adjacent to the cam portion 38a of the blocking control cam 38, the blocking frame 32 rotates in the reverse A direction, and the blocking hook 34 is connected to the blocking cam 29. At this time, by the above-mentioned blocking mechanism, the connection between the driving pulley 27 and the driving shaft 28 is released, and then the driving shaft 28 rotates with inertial force to stop the connection between the front end portion 34 a of the blocking hook 34 and the cam portion 29 a of the blocking cam 29. Of connection. This also stops the needle 6 and the balance 8 from moving up and down. Next, the push-up cylindrical coil 12 is actuated, and the push-up link 13 is swung backward. Thereby, the tangent control lever 18 and the tangent wrist 19 are rotated, and the tangent link 22 is swung to the side. Then, the movable knife edge 23 is rotated to cut off the line between the movable knife edge 23 and the fixed knife edge 25. At the same time, the control lever 14 is rotated and pushed up, and the wire 60 is swung backwards to increase the path of the thread, and the thread is pulled out by the thread supply unit. In addition, 'the protruding portion 14a and the hook portion i0a are connected by pushing up the control lever 14, and the gripping device 10 and the button jig 17 rise, but because there is a gap between the protruding portion 14a and the hook portion i0a, The gripping device 10 and the button jig 17 which are cut slowly are raised. In the final stage of the sewing operation and the sewing of the sewing button, the operation of the knot will be described with reference to FIGS. 6 to 17. Figures 8 to 17 show the coordinated relationship between the needle 6, the rotary hook device 41, and the thread-collecting unit 54 during the knotting operation. As for the positional relationship, each stage is shown in order, so no matter which figure (A) is a cross-sectional view, (B) is a perspective view, symbol 100 is a line, and symbol 202 is a button. First of all, the second line adjusting member 57 is used to adjust the pushing force on the line, and the paper size of the line is adjusted to the Chinese National Standard (CNS) A4 (210X297 mm) 19 528823 A7 ------: ___ B7 ____ V. Description of the invention 1 (7) —- tension. By the pressing force of the second wire adjusting member 57, the balance 8 is lifted, and when the wire is pulled, the coil is made to not be close to the cloth 201 at all. In addition, the cylindrical coil 64 is controlled by the control device to adjust the pushing force of the j-th wire adjusting member% to the wire to zero. After stepping on the start lever (not shown), as shown above, the drive pulley 27 and the drive shaft 28 are connected by the above-mentioned blocking mechanism to start single-chain sewing (time 0). The needle 6 falls into the button hole and penetrates the cloth 2 〇1, the rotary hook device 41 captures the thread from the needle 6 (time T1). Then, the needle 6 rises, and after the needle is dropped at a fixed button hole, the rotary hook and loop device 41 catches the thread and forms a new loop (time T2). The new coil is passed through the newly formed coil, and the newly formed coil is released by the rotary hook device 41, and the needle 6 is raised (between time T2 and time T3). At this time, the wire was pulled because the path of the wire was increased by the rise of the scale 8. However, by the second wire adjusting member 57, the coil just formed was loosened, so that the coil was not completely close to the cloth 201 (FIG. 6). ). Repeat the above operation (between time T3 and time T5). As shown in FIG. 6, the coil 200 is in a relaxed state, and the coil 200 is formed into a mild single-chain type that is not nearly close to the cloth 201. This single-chain stitch is thinner than the usual single-chain stitch, and forms a gap between the coil 200 (thread 100) and the cloth 201 forming the sewing machine. That is, only the second thread adjusting member is used to give a thread pushing force. This pushing force is weaker than the normal chain type, so that the loop 200 (thread 100) forming the sewing machine is in a relaxed state. Next, a knot operation is performed. At time T4, the first coil 100a is formed (the Chinese National Standard (CNS) A4 specification (210X297 mm) applies to this paper size.) ----- Order ------------- 豢 · (Please read the precautions on the back before filling in this page) -20-528823 A7 ________________B7__________ V. Description of the invention < 8 ) 2 stitches formed before the last needle drop). Figure 8 shows the needle 6 rising. Moreover, FIG. 8 shows the state at time T5. Secondly, the needle 6 position is at the needle drop position (other button holes) before the last needle drop, and the needle 6 starts to descend (Figure 9). Furthermore, after the needle 6 is lowered and then started to rise, the force swivel type fishing ring device 41 starts to capture the thread from the needle 6, and the thread gathering portion 54 is connected to the first coil 100a. Thereafter, the needle 6 rises further, the thread-collecting portion 54 leaves the first coil 100a, and is captured on the thread 100 of the rotary hook device 41 to form a second coil 100b, and at the same time, the second coil l〇〇b through the i-th coil 100a, the first! The coil 100a is disengaged by a rotary-type coil device 41 (Fig. 11). In this state, the wire pushing force is given by the second wire adjusting member 57. Since the first coil 100a is a pushing force that does not bring it close to the cloth at all, the scale 8 forms the first wire in order to pull the wire from the supply unit. The length of the line of the first coil 100a becomes longer, and the first coil 100a becomes slack. Here, before the last stitch, the button-dropping button hole is the same as the button hole that started to fall into the same hole, the thread gathering portion 54 is close to the second coil 100b on one side, and the rotary hook-and-loop device 41 starts to fill the thread with the needle 6 ( (Fig. 12), the cylindrical coil 64 is actuated, and the first wire adjusting member 58 is pressed to the wire (time T7 in Fig. 7). At this time, the pushing force of the wire by the first wire adjusting member 58 is greater than the pushing force of the wire by the second wire adjusting member. Next, the rotary hook-and-loop device 41 starts to infiltrate the captured wire into the second coil 100b, and the thread-gathering portion 54 is disengaged by the second wire adjusting member i00b (Fig. 13). In this state, in order to apply the thread pushing force from the first thread adjusting member, the second coil 100b and the thread gathering portion 54 are connected in the same manner, and the path of the thread is increased so that the single-chain stitching performed from this point (also It is the coil 200) holding the wire. As a result, when the condensing section 54 is separated from the second coil 100b, the paper size is formed to apply the Chinese National Standard (CNS) A4 specification (210X297 governor). Binding ----------- ------- Line (Please read the precautions on the back before filling this page) 21 528823 A7 ----------- B7_ V. Description of the invention 1 (9) The second coil l〇〇 The length of the line b is longer, and the second coil 100b is loosened. Thereafter, the third coil 100c is formed to pass through the second coil 100b (Fig. 14). Furthermore, the needle 6 is raised, and the third coil 100c is pulled down (Fig. 15). As described above, the first coil 100a and the second coil 100b are slack. As the third coil 100c approaches the third coil 100c, the first coil adjusting member 58 applies a linear pushing force, and the first coil 100a also follows. The third coil 100c passes through the second coil 100b (Fig. 16). In this way, the third coil 100c is pulled down, and the connection between the driving pulley 27 and the driving shaft 28 is released by the blocking mechanism as described above, and the needle 6 and the scale 8 are stopped from moving up and down (T8 shown in Fig. 7). Next, the cylindrical coil is actuated, and the movable blade 23 and the fixed blade 25 are actuated (FIG. 16), whereby the third coil 100c is cut off (time T9 in FIGS. 17 and 7), and secondly, the button clamp 17 rises to release the restraint of the cloth (time T10 in FIG. 7). At this time, the winding thread 60 is swung backward to increase the path of the thread, and the thread is pulled out for the next sewing action. However, the first thread adjustment member 58 gives the thread a pressing force. The pushing force to the thread is still large, so the thread inserted into the needle 6 is not pulled out by the needle 6 ', but is pulled out by the thread supply section. The knot formed as described above is a knot formed by forming the knot portion of the first coil 100a by forming the knot portion of the second coil 100b. In other words, the end 100d of the knot line passes through the first coil i00a, and the end 100d of the line passing through the} coil i00a is the two lines formed by exaggerating the first coil 100a. (That is, the second coil 100b concludes the first coil 100a), and passes through the knot formed by the state of the i-th coil 100a again. That is, the tip portion of the first coil 100 and the second coil 100 is formed to pass through the first coil 100a at 2 degrees, and at the same time, the Chinese paper standard (CNS) Α4 specification (210X297) (Gongchu) -------------..... (Please read the notes on the back before filling in this page) •, \ Swallow-tube, 22 528823-A7 B7 V. Invention Explanation 3 (〇) After the first coil 100a is rotated around the first coil 100a, the first coil 100a is once again passed through the same side as the first passing side, so even the first coil 100a The wire end portion 100d was pulled out, and by the coil 100a, the wire end portion 100d was left unknotted, so that the knot was not completely untied. -Referring to Fig. 18, the end 100d of the knot wire thus formed (Fig. 18 (A)) is first pulled out by the first coil 100a (Fig. 18 (B)). Even in the case of φ, the end 100d of the wire pulled out by the first coil 100a is in a state of passing through the first coil 100a (Fig. 18 (C)). Therefore, even if the end portion of the thread is pulled by the skin or the like, the end portion 100d of the thread will not be pulled out from the first coil 100a, and a knot that cannot be detached by the thread can be easily formed. In addition, after the third coil 100c is formed, the pushing force is adjusted by the first wire adjusting member 58 to form a hard knot by pulling the wire of the balance 8 to form a knot that is not easy to untie. Furthermore, in this embodiment, in order to adjust the slackness of the thread by the driving force of the cylindrical coil 64, as in the conventional chain sewing machine described above, it can be completed even without the thread hanging portion 503. Therefore, the knot described above can be formed with a very simple structure. Furthermore, as in the conventional chain sewing machine, the machine 'does not adjust the slackness by using the thread hanging part 503 mechanically, and the electrical control cylinder • shaped coil 64' is used to adjust the slackness of the coil. There are still few key sewing machines, which improves the reliability of sewing machines. < Second embodiment > A second embodiment of the thread adjusting device according to the present invention will be described. First, the structure will be explained. In this embodiment, it is similar to the paper. Applicable to A4 specifications⑵0 × 297 ^ (Please read the precautions on the back before filling in this page) • Order 丨: Line 丨 23 528823 A7 ------ Ξ ______ V. Description of the invention "1" In the first embodiment, descriptions are omitted for those having the same structure, and only different structures will be described. Not shown, but the sewing machine 1 of the second embodiment has a control device for controlling the operation of the sewing machine. The above-mentioned thread adjusting device has a control device that controls the adjustment of the tension of the thread. The control device includes: an encoder (not shown), a CPU (Central

Processing Unit), ROM (Read Only Memory), RAM (Randam

Access Memory), and drive transmission. The encoder (not shown) is used to detect the rotation state and output signal of the sewing machine, the ROM is used to memorize the control program and control data, the RAM is used to form the operating field of the above cpu, and the drive transmission device It is used to control and push up the cylindrical coil 12 and the cylindrical coil 64 according to the control program and control data. Moreover, each department is connected by a bus such as a data bus. The driving of the cylindrical coil 64 is controlled by this control device so as to form a wire adjusting pushing force given by the first wire adjusting member. In addition, the timing of the operation of the cylindrical coil 64 is controlled by the control device. That is, the rotation state of the sewing machine is detected by the above-mentioned decoder, and the state is output to the CPU. Thereby, the CPU grasps the up and down position of the needle 6 and the rotation position of the rotary hook and loop device 41, operates the cylindrical coil 64 at a certain timing, and the first thread adjusting member 58 adjusts the pressure on the thread. After detailed description, unlike the first embodiment, when the single-chain type is performed, the wire 1 is adjusted by the 苐 1 wire adjusting member 58 to drive and control the cylindrical coil 64. Then, the needle 2 is dropped before the last needle drop, and after the needle 6 rises and the needle 6 reaches the top dead center, the needle 6 is driven from the first thread adjustment member to the thread, and the cylindrical coil 64 is driven and controlled. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) ------- '.....: Double ... 、 玎 --------------- tube · (Please read the precautions on the back before filling out this page) 24 V. Description of the invention) For the action in the single chain type, and, the single The details of the knotting operation in the final stage of the chain will be described with reference to FIGS. 8 to 17, 19, and 20. First, as shown in Fig. 19, the second thread adjusting member is used to adjust the pushing force of the thread to adjust the tension of the thread. In addition, the cylindrical coil 64 'is controlled by the control device to apply a wire load pushing force by the first wire adjusting member, and the first wire adjusting member gives the wire tension. Moreover, by the pushing force of the second wire adjusting member 57 and the pushing force of the first wire withdrawing member 58, when the wire in the single chain type is pulled, the coil is completely pulled close to the cloth 201, so that the coil is not loosened. Pushing pressure. In addition, when the pushing force of the second wire adjusting member 57 is not applied to the wire by the second wire adjusting member 58, the coil will not be pulled into the cloth 201 completely after the scale 8 is pulled, as a way to relax the coil. Pushing pressure. After adjusting the pushing force given to the thread by the respective thread adjusting members, stepping on the unillustrated start lever, the drive pulley 27 and the drive shaft 2 8 ′ are connected by the above-mentioned blocking mechanism to start one-touch sewing (time 0). After the needle 6 falls into the button hole and penetrates the inside of the cloth 201, the rotary hook and loop device 41 captures the thread (time Til) by the needle 6 to form a coil. Then, the needle 6 is raised, and the needle is dropped at the next fixed button hole, and the rotary hook and loop device 41 catches the thread to form a new coil (time T12). The new coil is allowed to sneak into the newly formed coil, and the catch of the newly formed coil is released by the rotary hook and loop device 41, and the needle 6 rises (time T12 to time T13). At this time, because the path of the line was increased by the rise of the sky rating 8, the line was pulled, but the second line adjustment member 5 7 and the first line adjustment member 58 were adjusted by the pushing pressure, and the coil formed in advance was completed. Close to cloth 201 (picture 20). Repeat the above actions (between time T13 and time T15). As shown in Figure 20, the coil 200 is formed completely close to the cloth. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 public copy) 528823 A7 B7 Fifth, the description of the invention is a single-chain type. The stitches 200 forming the stitches at this time are in a relaxed state. Next, perform a knot operation. At time T14, the i-th coil 100a (the coil formed when the needle is dropped 2 before the last needle drop) is formed, and FIG. 8 shows that the needle 6 is in a rising state. Moreover, FIG. 8 shows the state at time T15. At this time, T15 controls the cylindrical coil 64 by the control device, sets the pushing force of the wire by the i-th wire adjusting member 58 to 0, and makes the pushing force of the wire by the second wire adjusting member only 0. Secondly, the needle 6 position is at a needle drop position (other button hole) before the last needle drop, and the needle 6 starts to descend (Figure 9). Furthermore, after the needle 6 is lowered and then started to rise, the rotary hook and loop device 41 starts to catch the thread from the needle 6 and the thread collecting portion 54 is connected to the first coil 100a (time T16 in Figs. 10 and 19). After that, the “needle 6” rises further, and the thread-collecting portion 54 is detached from the first coil 10 (^) and captured by the thread 100 of the rotary hook-and-loop device 41 to form the second coil 100b ′ and the second coil i00. b passes through the first coil i00a, and the first coil 100a is disengaged by the rotary hook and loop device 41 (FIG. 11). In this state, the first coil is formed to apply the pressing force only by the second wire adjusting member, so the first The length of the line of the coil 100a becomes longer, the first coil 100a becomes slack, and the first coil 100a forms completely not close to the cloth 201. Here, the last needle starts to fall into the previous needle drop button. The hole is the same as the button hole. The threaded portion 54 is close to the second coil 100b on one side. After the rotary hook device 41 starts to fill the thread with the needle 6 (Figure 12), the cylindrical coil 64 operates and is adjusted by the first thread. The member 58 applies a pushing force to the line (time T17 in FIG. 19). At this time, the pushing force of the line is given by the first line adjusting member 58 to the adjusting line 58 by the first line than before (time 0 to time T15). The tension given to the thread is greater, and it also applies the Chinese National Standard (CNS) A4 specification (210X297 mm) than the paper size (please read first Note then fill the surface of the page), τ_ - Camp | 26 528823 - A7 __B7__ V. invention is described rule) to give 2-line adjustment member 57 pushes the pressure line is larger. Next, the rotary hook-and-loop device 41 causes the captured wire to begin to pass through the second coil 100b, and the condensing portion 54 is separated from the second coil (Fig. 13). In this state, the second coil 100b is connected to a concentrating portion 54 in the same way, the path of the line is enlarged, and the line is pulled, but when the converging portion 54 is separated from the second coil 100b, the first coil 100a Since a part of the slack line is pulled to the second coil 100b, the length of the line forming the second coil becomes longer, and the second coil 100b becomes slack. Thereafter, a third coil 100c (FIG. 14) passing through the second coil 100b is formed. Furthermore, the needle 6 is raised, and the third coil 100c is pulled down (Fig. 15). As the first coil 100a and the second coil 100b are loosened, the first coil 100a is also pulled along with the third coil 100c due to the linear tension given by the first thread adjusting member 58 as it approaches the third coil 100c. Pass the second coil 100b (Figure 16). In this way, the third coil 100c 'is pulled down by the blocking mechanism as described above, and the connection between the driving pulley 27 and the driving shaft 28 is released, and the needle 6 and the scale 8 are stopped from moving up and down (time T18 in FIG. 19). Next, the cylindrical coil 12 is pushed up to operate, and the movable blade 23 and the fixed blade 25 are actuated (Fig. 16), thereby cutting off the third coil-100c (time T19 in Figs. 17 and 19), and secondly, The button jig 17 rises to release the holding of the cloth (time T20 in FIG. 19). At this time, the winding wire 60 is moved backward to increase the path of the wire and the wire is pulled, but the pushing force of the wire by the first wire adjusting member 58 is greater than the pushing force of the wire by the second wire adjusting member. Therefore, the thread inserted into the needle 6 cannot be pulled out from the needle 6, but the thread is pulled out by the thread supply section. The knots formed as above, the knots formed by the first coil 100a are in accordance with the Chinese paper standard (CNS) A4 specification (210X297). (Please read the precautions on the back before filling this page) — • 、 may ·: line 丨 27 528823 A7 ^^ --- B7 —____ V. Description of the invention right) The knot formed by the knot portion formed by the second coil I00b. In other words, the end portion 100d of the knot line passes through the first coil 100a and the end portion 100d of the line 100a, and the i-th coil 100 is formed in a horizontal direction. ; 2 After the line (that is, the second coil 100b concludes the first coil 10), a knot that passes through the first coil 100a is formed again. This knot is the same as the knot of the i-th embodiment described above. In addition, although the example of the embodiment has been described in the sewing machine, it may be implemented in a chain sewing machine other than the sewing machine. &lt; Effect of the invention &gt; As in the above invention according to the first item of the claim range, the thread adjustment device relaxes the coil formed at least one stitch before the last stitch, and is formed by pulling the last stitch In the case of the third coil, in order to prevent the coil from being loosened and set tension, the third coil is pulled i-th coil formed by two needle drops before the last needle drop, and the towed first coil is formed through the last one As a result, the second coil of the needle can form a knot formed by the second coil. The knot is a knot that is very difficult to untie and the chain stitch formation cannot be undone. In addition, the formation of knots due to the control of electricity reduces the number of movable parts and improves the reliability compared to the formation of knots by the control of machinery. In addition, according to the invention in item 2 of the scope of patent application, the coil formed at least one stitch before the last stitch is loosened, and when the third coil is pulled, in order not to loosen the coil, in order to adjust the pressure by a pressure regulating device The thread adjusting member applies pressure to the thread, so the third coil draws the first coil, and the pulled first coil passes through the second coil, so that the first coil can form a knot formed by the second coil. Since the knot is a knot that is difficult to untie, the chain stitch formation is difficult to untie. This paper size applies to China National Standard (CNS) Α4 specification (210X297 mm) -------------------------- 鬓 ίί ... ......., 玎 …… ............ fees. (Please read the notes on the back before filling in this page) 28 528823 、 Instructions for private use In addition, according to item 3 of the scope of patents The invention, the knot made by the first coil. Therefore, the second taste circle can form knots formed by 20% of each circle, so the chain stitch formation is not easy to untie. Brother 2 In addition, according to the invention in item 4 of the patent scope, the coil can be a knot formed by the second coil. Thus, the m-th ring can pinch the knots formed by the n-th coil, so that the key stitch formation cannot be easily unlocked. <Brief Description of Drawings> Fig. 1 is a perspective view showing the appearance of a key sewing machine as an example to which the present invention is applied. ~, Fig. 2 is a schematic perspective view showing the inside of the above-mentioned chain-stitch sewing machine. Fig. 3 is a perspective view showing the inside of the above-mentioned sewing machine. Fig. 4 is a plan view showing the upper face of the arm of the sewing machine. Fig. 5 is a perspective view showing a main part of the thread of the sewing machine; Fig. 6 is an explanatory view showing that the chain stitches of the button sewing machine forming the first embodiment of the present invention are linearly developed. Fig. 7 is a timing chart showing the operation of the chain stitch sewing machine according to the first embodiment of the present invention. Figures 8 (A) to (B) are diagrams showing the formation process of knots in the first embodiment example and the first embodiment example of the present invention. Figures 9 (A) to (B) are diagrams showing the formation process of knots in the first embodiment and the embodiment of the present invention. Figures 10 (A) to (B) are diagrams showing the formation process of knots in the first embodiment example and the second embodiment example of the present invention. 2 2 2nd t -------------------, possible ........ (Please read the back first Note for refilling this page) This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 29 528823 A7 --------- B7 _ V. Description of the invention) Section 11 (A) (B) is a diagram showing the formation process of knots in the i-th embodiment and the second embodiment of the present invention. Figures 12 (A) to (B) are diagrams showing the formation process of knots in the first embodiment example and the second embodiment example of the present invention. Figures 13 (A) to (B) are diagrams showing the formation process of knots in the first embodiment example and the second embodiment example of the present invention. Figures 14 (A) to (B) are diagrams showing the formation process of knots in the first embodiment example and the second embodiment example of the present invention. Figures 15 (A) to (B) are diagrams showing the formation process of knots in the first embodiment example and the second embodiment example of the present invention. 16 (A) to (B) are diagrams showing the formation process of knots in the first embodiment example and the second embodiment example of the present invention. Figures 17 (A) to (B) are diagrams showing the formation process of knots in the i-th embodiment and the second- embodiment of the present invention. Figures 18 (A) to (B) are diagrams showing the formation process of knots in the j-th implementation example and the second through-implementation example of the present invention. Fig. 19 is a timing chart showing the operation of the chain stitch sewing machine according to the second embodiment of the present invention. Fig. 20 is an explanatory view showing that the chain stitch of the sewing machine forming the sewing example of the second embodiment of the present invention is linearly developed. Figures 21 (A) to (C) are diagrams showing the formation process of knots in a conventional chain sewing machine. Figures 22 (A) to (C) are diagrams showing the process of forming a knot in a conventional chain sewing machine. This paper size is in accordance with China National Standard (CNS) A4 specification (21〇 Father 297 public love) (Please read the precautions on the back before filling in this page) 30 528823 A7 V. Description of Invention 2 (8 Section 23 (A) ~ (C) is a drawing showing the formation process of knots in the conventional chain sewing machine. The 2 "figure is for explaining the formation of knots in the conventional chain sewing machine.

1 ... Chain sewing machine 6 ... _... Needle 8 ... Libra 12 ... Push the cylindrical coil 41 ... Rotary hook device 57 ... Second thread adjustment member (thread adjustment device) 58 ... ·· 1st line adjustment member (line adjustment member, line adjustment device) 59 ··· 3rd line adjustment member 60 ··· winding line 61 ··· guide line 62 ··· guide line 63 ... guide line 64… Cylinder-shaped coil (pressure adjustment device, thread adjustment device) 100… Thread lOOa… 1st coil (coil formed by two needle drops before the last needle drop) 1〇b · •• 第2 coils (coil formed by one needle drop before the last needle drop) • 100c · •• 3rd coil (coil formed by the last needle drop) 100d ··· the end of the thread

Order Climbing -31-

Claims (1)

328823 Scope of patent application L A chain sewing machine, which includes: (Please read the precautions on the back before filling out this page) A needle for inserting the thread and making up and down movement; Square loop hook type hook device for Capture the thread from the needle, and form a coil by stretching the captured thread; and the thread circling device, which sets the tension of the thread by electrical control to adjust the slack of the aforementioned coil; and, The rotary hook and loop device works together to form a chain stitch. • The key stitch and the control device are included in the above-mentioned rotation. In this case, the coil tension is set to relax the coil, and when the above-mentioned rotary hook-and-loop device forms the last needle drop loop, the thread tension is set to prevent the coil from being loosened. 2. If the scope of patent application is the first! The chain stitch of item _, wherein the aforementioned thread adjusting device includes: a supply section for supplying the thread to the aforementioned needle; a treasure thread 丨-thread adjusting member for the path from the aforementioned thread supplying section to the aforementioned needle The upper line exerts pressure; and-the pressure adjusting device is controlled by electricity, and when the aforementioned rotary hook-and-loop device forms a coil at least before the final needle drop, the pressure is changed to relax the coil, and When the rotary hook and loop device forms the last needle drop loop, the pressure changes so that the bobbin does not relax. 3. If the key sewing machine according to item 2 of the patent application scope, wherein the aforementioned thread adjusting device has a second thread adjusting member 'for applying pressure to the thread on the path from the aforementioned thread supply section to the aforementioned needle; and, The needle rises from the initial needle drop to the final needle drop ^ The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 public love) 32 52 * 8823 A8 B8 C8 D8, only between the scope of the patent application The thread adjusting member applies pressure to the thread to relax the stitch formed from the first needle drop to the first needle drop before the last needle drop, and the needle starts to rise after the last needle drop. The pressure exerted by the member on the thread rises, and the thread adjustment member and the second thread adjustment member exert pressure on the thread so that the last needle drop loop is not loosened. 4. The chain sewing machine according to item 2 of the scope of patent application, wherein the aforementioned thread adjusting device has a second thread adjusting member for applying pressure to the thread on the path from the aforementioned thread supply section to the aforementioned needle; The needle starts to drop until the needle starts to drop 1 hour before the last needle drop. The thread adjustment member and the second thread adjustment member apply pressure to the thread to form a loop formed from the first needle drop to the last two needle drops. Not slack; and before the needle drops from 1 before the last needle drop until the needle starts to rise after the last needle drop, the pressure adjusting device reduces the pressure applied to the thread by the thread adjusting member so that 1 The stitch formed when the needle is dropped is loose; and the needle starts to rise after the last needle is dropped, the pressure adjusting device increases the pressure applied to the thread by the thread adjustment member, and the thread β aligns the member and the description by the aforementioned thread. The second thread adjustment member applies pressure to the thread, so that the last needle drop loop does not loosen. 5. The chain sewing machine according to item 丨 or 4 of the patent application scope, wherein the aforementioned chain sewing machine is a sewing machine. This paper size applies to China National Standard (CNS) Α4 specification (210X297 mm)--------------------- Packing ----------- ------- Order ------------------ line (Please read the precautions on the back before filling this page) -33