DEVICE FOR SEWING CLOSURE CHAINS

Abstract

A device for sewing zipper chains is provided, comprising: a zipper chain supply portion configured to continuously supply a zipper chain; a blank supply portion configured to sequentially and continuously supply a plurality of blanks for sewing onto the zipper chain; a sewing machine configured to sew the blank to the zipper chain; and a zipper chain extraction portion configured to extract the zipper chain in a state where the blank is sewn to the zipper chain. The blank supply portion, the sewing machine, and the zipper chain extraction portion are configured to be driven by a drive motor.The blank sheet supply part and the closing chain extraction part are configured to be driven by the drive motor, respectively, through continuously variable transmission machines.

Description

DEVICE FOR SEWING CLOSURE CHAINS pq LAnn / zznz / E / YiAi TECHNICAL FIELD The invention relates to a device for sewing zipper chains, which continuously sews components such as garment fabrics to a zipper chain. BACKGROUND OF THE TECHNIQUE In the related art, Patent Document 1 describes a sewing machine that continuously sews a blank, such as a trouser fly, to a zipper chain. The sewing machine includes a transfer portion arranged on an upstream side of a transfer path between a blank supply portion and the sewing machine, and a transfer speed adjustment portion arranged on a downstream side of the transfer path. The transfer portion has a drive roller and a support roller arranged above and below it, and it holds the blank between the rollers and transfers the blank. The transfer speed of the blank from the transfer speed adjustment portion is set lower than the transfer speed of the blank from the transfer portion.The sewing speed of the sewing machine is set lower than the transfer speed, which is adjusted using the transfer speed control. For speed control, servomotors are used to synchronize the feed rollers and adjust the feed speed. because LAnn / zznz / E / YiAi APPOINTMENT LIST PATENT LITERATURE Patent Literature 1: JP-A1-2006-158705 SUMMARY OF THE INVENTION TECHNICAL PROBLEM In the case of the related technology, the sewing machine's drive speed, the blank feed speed, and the zipper chain feed speed are adjusted by controlling multiple servomotors located in each section. This makes control difficult, the device structure complex, and also presents problems such as maintenance difficulties. Furthermore, there is also the issue that when the blank is sewn to the zipper chain, the blank or part of the zipper chain tape shrinks, creating a gap between the blank and the blank. The invention is provided in view of problems in the related art, and the objective of the invention is to provide a device for sewing fastener chains that has a simple structure and can perform the sewing reliably and beautifully. because LAnn / zznz / E / YiAi SOLUTION TO THE PROBLEM The invention provides a device for sewing zipper chains, comprising: a zipper chain supply portion configured to continuously supply a zipper chain; a blank supply portion configured to sequentially and continuously supply a plurality of blanks for sewing onto the zipper chain; a sewing machine configured to sew the blank to the zipper chain; and a zipper chain extraction portion configured to extract the zipper chain in a state where the blank is sewn to the zipper chain. The blank supply portion, the sewing machine, and the zipper chain extraction portion are configured to be driven by a drive motor.The blank sheet supply part and the closing chain extraction part are configured to be driven by the drive motor, respectively, through continuously variable transmission machines. The drive motor is set to rotate continuously. Continuously variable drive machines are set to be driven intermittently. The blank sheet must be sewn to the clamping chain via the sewing machine. The blank sheet supply section includes a side supply pulley configured to be driven by the drive motor via one of the continuously variable transmission machines; and a side supply ring belt configured to rotate via the side supply pulley. The blank sheet is conveyed by the rotation of the side supply ring belt. The side supply ring belt, configured to rotate via the side supply pulley, is opposite a pressure component, such as a pressure ring belt configured to press against the side supply ring belt. The blank sheet must be held by the side supply ring belt, and the pressure component must be supplied to the sewing machine. The extraction section of the closing chain includes a side extraction pulley configured to be driven by the drive motor via another continuously variable transmission machine; and a support component such as a driven roller opposite the side extraction pulley. The closing chain sewn with the blank sheet must be held by the side extraction pulley, and the support component must be extracted. The side extraction pulley is connected to the other continuously variable transmission machine via a side extraction ring belt. The side supply pulley of the blank sheet supply part and the side extraction pulley of the closing chain extraction part are configured to adjust each of the continuously variable transmission machines, so that the rotation speed of the side extraction pulley of the closing chain extraction part is set lower than the rotation speed of the side supply pulley of the blank sheet supply part. A side pulley of the sewing machine and each drive pulley of each of the continuously variable transmission machines are rotatably connected to a rotating shaft of the drive motor respectively through annular belts. PQ LAnn / ZZnZ / E / YIAI EFFECTS AND ADVANTAGES OF THE INVENTION The device for sewing zipper chains of the invention uses a drive motor to power the blank supply unit, the zipper chain extraction unit, and the sewing machine. It has a simple structure and is easy to maintain. The drive speed of the blank supply unit and the zipper chain extraction unit can be precisely adjusted using continuously variable transmissions. The blank feed speed and the zipper chain extraction speed can be optimally controlled individually.In particular, by adjusting the rotation speed of the side pulley of the zipper chain extraction part to be slightly lower than the side pulley of the blank supply part, shrinkage during sewing of the blank and zipper chain can be absorbed, and the blank and zipper chain can be sewn beautifully, and it is also not easy to have a gap between the sewn zipper blanks. because LAnn / zznz / E / YiAi BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective view of a device for sewing closure chains according to an embodiment of the invention. FIG. 2 is a schematic front view of a device for sewing closure chains according to an embodiment of the invention. FIG. 3 is a schematic top view of a drive motor and a continuously variable transmission machine of the device for sewing closure chains according to the modality. FIG. 4 is a perspective view of a main part of the device for sewing closure chains according to the modality. because LAnn / zznz / E / YiAi DESCRIPTION OF MODALITIES The following will describe embodiments of the invention based on the drawings. Figures 1 to 4 show a device for sewing zipper chains according to one embodiment of the invention. A zipper chain sewing device 10 of the embodiment includes a zipper chain supply portion 14 that continuously feeds a zipper chain 12. The zipper chain 12 is formed by connecting toothed fasteners installed on zipper tapes along the longitudinal direction. The zipper chain supply portion 14 is arranged so that the elongated zipper chain 12 is wound around a roller (not shown), etc., to continuously supply the zipper chain 12 from above to a sewing machine 16, which will be described later. Near the sewing machine 16, three adjusting pulleys 18 are included for adjusting the tension of the zipper chain 12 and stably supplying the zipper chain 12. The sewing machine 16 is positioned near a location where the closing chain 12, supplied from above, is guided horizontally by the adjusting pulley 18 at its lower end. A sewing needle or other structures are omitted from the sewing machine 16. The sewing machine 16 does not include a feed mechanism. The closing chain 12 is drawn intermittently through a closing chain extraction portion 50, which will be described later. The sewing and movement of a blank 22, which will be described later, are repeated. A machine needle (not shown) of the sewing machine 16 penetrates a stitching hole 17a. The stitching hole 17a is formed on a sliding surface 17 on which the closing chain 12 is positioned to move horizontally, and the machine needle is provided so that the closing chain 12 and the blank 22 can be sewn together. A blank supply part 20 continuously supplies, for example, blank 22 of a fly part of a pair of trousers to be sewn to the zipper chain 12, so that blank 22 overlaps the zipper chain 12 fed to a predetermined position of the sewing machine 16. The blank supply part 20 is connected to a drive motor 30 located below the sewing machine 16, and sends and supplies multiple blank sheets 22 (not shown) one by one along the horizontal direction towards the side of the sewing machine 16. The blank sheet supply portion 20 includes a pair of side supply pulleys 34, driven via a continuously variable transmission machine 32; a steering pulley 35 located below the side supply pulleys 34; and a driving pulley 36 disposed on the continuously variable transmission machine 32. A side supply ring belt 38 extends across the pair of side supply pulleys 34, the steering pulley 35, and the driving pulley 36 disposed on the continuously variable transmission machine 32. A rotating shaft of the side supply pulley pair 34 is arranged in a horizontal plane, and the side supply ring belt 38 between the side supply pulley pair 34 is also located in the horizontal plane. A pressure ring belt 42 is arranged. The pressure ring belt 42 is opposite the side supply ring belt 38 between the side supply pulley pair 34, extends between a pair of driven pulleys 40, and presses against the side supply ring belt 38. One upstream side is relative to a supply direction of blank sheet 22 from blank supply portion 20, and a blank feed portion 24 of blank 22 is arranged on the upstream side near the side supply pulley 34. The blank feed portion 24 is provided with multiple conveyor rollers 28 driven by an annular feed belt 26. Among the conveyor rollers 28, the conveyor roller 28 at one end upstream of a feed direction is connected to a transport motor 33 via an annular transport belt 37. A driven roller 29 is arranged opposite the conveyor roller 28 to press and hold the transported blank sheet 22. The continuously variable transmission machine 32 includes a drive pulley 46. The drive pulley 46 is connected to a motor pulley 31 coaxial with the drive motor 30 via a side supply drive belt 44. An adjusting pulley 45 for adjusting the tension of the side supply drive belt 44 is arranged between the motor pulley 31 and the drive pulley 46. The drive pulley 36 and the drive pulley 46 are adjusted so that the rotation transmitted from the drive motor 30 to the drive pulley 46 is reduced to a predetermined speed reduction ratio in the continuously variable transmission machine 32, and is transmitted from the drive pulley 36 to the side supply ring belt 38. The continuously variable transmission machine 32 is provided with an adjusting handle 48 for manually adjusting the speed reduction ratio. A zipper chain extraction part 50 is arranged on a downstream side of the sewing machine 16 in a transport direction of the zipper chain 12. The zipper chain extraction part 50 extracts the zipper chain 12 in a state in which the blank sheet 22 is sewn onto the zipper chain 12. The extraction portion of the closing chain 50 also includes a pair of side extraction pulleys 54 connected to the drive motor 30 and driven via a continuously variable transmission machine 52; an adjusting pulley 55 for tension adjustment located below the side extraction pulley 54; and a drive pulley 56 disposed on the continuously variable transmission machine 52. A side extraction ring belt 58 extends across the side extraction pulley 54 and the drive pulley 56 of the continuously variable transmission machine 52. A driven roller 60 is opposite the side extraction pulley 54 and is located above the side extraction pulley 54. The driven roller 60 is arranged to advance and retreat in a position crimped with the side extraction pulley 54 and a position where the driven roller 60 retracts upward along an up-and-down direction by means of a lever 62. The continuously variable transmission machine 52 also includes a drive pulley 66. The drive pulley 66 is connected to the motor pulley 31 coaxial with the drive motor 30 via a side pull-out drive belt 64. An adjusting pulley 65 for adjusting the side pull-out tension of the drive belt 64 is arranged between the motor pulley 31 and the drive pulley 66. The drive pulley 56 and the drive pulley 66 are configured such that the rotation transmitted from the drive motor 30 to the drive pulley 66 is reduced to a predetermined speed reduction ratio in the continuously variable transmission machine 52, and is transmitted from the drive pulley 56 to the side supply ring belt 58. The continuously variable transmission machine 52 is also provided with an adjusting handle 68 for manually adjusting the speed reduction ratio. The supply side drive belt 44 and the supply side drive belt 64 are wound around the motor pulley 31, which is fixed coaxially to the rotating shaft of the drive motor 30. A sewing machine ring belt 70 is also wound around and extends along the side of the sewing machine 16. The sewing machine ring belt 70 is wound between the motor pulley 31 and a sewing machine side pulley 72 that drives the sewing machine 16. An adjusting pulley 75 for adjusting the tension of the sewing machine ring belt 70 is arranged in the middle of the sewing machine ring belt 70. An operating disc 74 is fixed coaxially to the sewing machine side pulley 72 and is arranged so that the position, etc., of the sewing machine needle 16 can be adjusted and operated manually. Driving mechanisms such as the continuously variable transmission machine 32, the continuously variable transmission machine 52 and the drive motor 30 are located on the sides of the blank sheet supply part 20 and the closing chain extraction portion 50, and are arranged in a storage box 76 to protect the protection mechanisms. According to the structure, drive motor 30 is connected to and drives the two continuously variable transmission machines 32 and 52, and the sewing machine 16. The blank supply section 20, the zipper chain extraction section 50, and the sewing machine 16 are driven by drive motor 30 to perform predetermined actions. Here, motor 30 rotates continuously at a predetermined speed, and the drive pulleys 46 and 66 of the continuously variable transmission machine 32 and 52 are configured to be driven intermittently according to the movement of the needle of the sewing machine 16. The following describes the action and function of the zipper chain sewing device 10 of the modality. The zipper chain sewing device 10 sequentially feeds blank sheets 22 one by one to the blank sheet supply section 24 from a blank sheet transport device (not shown) on the upstream side. A blank sheet 22 is held by the conveyor roller 28 and the driven roller 29 of the blank sheet supply section 24, and the blank sheet 22 is fed by the rotation of the conveyor roller 28. The fed blank sheets 22 are inserted one by one between the side supply ring belt 38 and the pressure ring belt 42 by the blank supply section 20. The blank supply section 20 drives the side supply ring belt 38 through the continuously variable transmission machine 32 using the drive pulley 36 rotating at a predetermined rotational speed through the rotation of the drive motor 30. By setting the rotational speeds of the continuously variable transmission machine 32 and the transport motor 33, the transport speed of the blank sheet 22 from the blank supply section 20 is set to be slightly lower than the feed speed of the blank sheet 22 from the blank feed section 24 on the upstream side. At this point, the extraction portion of the closing chain 50 also allows the drive pulley 56 to rotate via the continuously variable transmission machine 52 through the same drive motor 30, thereby extracting the closing tape from the closing chain 12 and the blank 22. At this time, taking into account the shrinkage caused by the stitching of the blank 22 onto the closing chain 12, the rotational speed of the drive pulley 56 is set to be, for example, approximately 5% slower than the rotational speed of the drive pulley 36. Through the rotation of the drive pulley 56, the closing chain 12, held by the side extraction pulley 54 and the driven roller 60, is synchronized with the stitching of the sewing machine 16, slides down together with the blank 22 along a sliding guide member 78 below, and is extracted for the next step. With regard to the actions of the drive motor 30 and the continuously variable transmission machine 32 and the continuously variable transmission machine 52 when sewing the zipper chain 12 and the blank sheet 22, the drive motor 30 rotates continuously, and the continuously variable transmission machine 32 and the continuously variable transmission machine 52 are driven by LAnn / zznz / E / YiAi intermittently in synchronization with the movement of the sewing machine needle 16. With regard to the intermittent drive, the movement stops for a period in which the sewing machine needle 16 is inserted into the clamping tape of the zipper chain 12 and the blank sheet 22, and when the sewing machine needle 16 comes out of the clamping tape and the blank sheet 22, the continuously variable transmission machine 32 and the continuously variable transmission machine 52 rotate by a predetermined angle through the drive motor 30.As a result, the closing chain 12 and the blank sheet 22 move at the interval of one needle stroke of the sewing machine 16, the continuously variable transmission machine 32 and the continuously variable transmission machine 52 stop again, and the needle of the sewing machine 16 is inserted into the clamping tape and the blank sheet 22. Repeating the actions, the blank sheet 22 is sewn onto the closing chain 12 through the sewing machine 16. According to the 10-mode closing chain sewing device, the three parts—blade feed section 20, closing chain extraction section 50, and sewing machine 16—are driven by a single drive motor 30. The number of drive motors is minimized, resulting in a simple structure and easy maintenance. Furthermore, the drive speeds of the blank feed section 20 and the closing chain extraction section 50 can be precisely adjusted by continuously variable transmissions 32 and 52, respectively, allowing for optimal control of the blank feed speed 22 and the closing chain extraction speed 12.In particular, by adjusting the rotation speed of the side pulley 54 of the zipper chain 50 extraction part to be lower than the side pulley 34 of the blank sheet 20 supply part in a predetermined ratio, the blank sheet 22 and the zipper chain 12 can be sewn beautifully, and it is also not easy to have a gap between the sewn zipper blank sheets. Furthermore, the device for sewing fastening chains of the invention is not limited to the above embodiment. The connection between the drive motor of each component and the continuously variable transmission machine may also use a power transmission mechanism other than the ring belt, and the connection between the continuously variable transmission machine and the supply side pulley or the extraction side pulley may also use a power transmission mechanism other than the ring belt. In addition, the crimping ring belt or the driven wavy roller for supplying the blank or extracting the support tape may also be a crimping component, a guide component, or a sliding component other than a belt or a roller. LIST OF REFERENCE NUMBERS 10: Device for sewing clasp chains 12: closing chain 14: part of the closing chain supply 16: sewing machine 17: slippery surface 17a: sewing hole 18, 45, 55, 65, 75: adjustment pulley 20: Part of blank sheet supply 22: blank sheet 24: blank sheet feeding section 26: feed ring belt 28: conveyor roller 29, 60: driven roller 30: driving motor 31: motor pulley 32, 52: continuously variable transmission machine 33: Transport engine 34: side supply pulley 35: steering pulley pq LAnn / zznz / E / YiAi, 46, 56, 66: drive pulley: conveyor ring: supply side ring: driven pulley: pressure ring: supply side drive belt, 68: adjustment handle: closing chain extraction portion: extraction side pulley: extraction side ring: lever: extraction side drive belt: sewing machine ring belt: sewing machine side pulley: operating disc

Claims

1. A device for sewing closure chains, comprising: a closure chain supply part (14) configured to continuously supply a closure chain (12) from a closure; a blank supply part (20) configured to sequentially and continuously supply a plurality of blanks (22) for sewing onto the closure chain (12); a sewing machine (16) configured to sew the blank (22) onto the closure chain (12);and a zipper chain extraction portion (50) configured to extract the zipper chain (12) in a state in which the blank sheet (22) is sewn to the zipper chain (12), wherein the blank sheet supply portion (20), the sewing machine (16) and the zipper chain extraction portion (50) are configured to be driven by a drive motor (30), and the blank sheet supply portion (20) and the zipper chain extraction portion (50) are configured to be driven by the drive motor (30) respectively through continuously variable transmission machines (32, pq LAnn / zznz / E / YiAi pq LAnn / zznz / E / YiAi 52).

2. The device for sewing closure chains according to claim 1, wherein the drive motor (30) is configured to rotate continuously, the continuously variable drive machines (32, 52) are configured to be driven intermittently, and the blank sheet (22) is to be sewn onto the closure chain (12) via the sewing machine (16).

3. The device for sewing closure chains according to claim 1 or 2, wherein the blank sheet supply portion (20) comprises: a side supply pulley (34) configured to be driven by the drive motor (30) through one of the continuously variable transmission machines (32); and a side supply ring belt (38) configured to rotate through the side supply pulley (34), and the blank sheet (22) is to be conveyed through the rotation of the side supply ring belt (38).

4. The device for sewing fastening chains according to claim 3, wherein the side supply ring belt (38) configured to rotate via the side supply pulley (34) is opposed to a pressure component (42) configured to press the side supply ring belt (38), and the blank sheet (22) is to be held by the side supply ring belt (38) and the pressure component (42) is to be supplied to the sewing machine (16).

5. The device for sewing closure chains according to claim 3, wherein the closure chain extraction portion (50) comprises: a side extraction pulley (54) configured to be driven by the drive motor (30) through another continuously variable transmission machine (52); and a support component (60) opposite the side extraction pulley (54), and the closure chain (12) sewn with the blank sheet (22) is to be held by the side extraction pulley (54) and the support component (60) is to be extracted.

6. The device for sewing closure chains according to claim 5, wherein the side extraction pulley (54) is connected to the other of the continuously variable transmission machines (52) via a side extraction ring belt (58).

7. The device for sewing closure chains according to claim 5 or 6, wherein the side supply pulley (34) of the blank sheet supply part (20) and the side extraction pulley (54) of the closure chain extraction part (50) are each configured to adjust the continuously variable transmission machines (32, 52), so that the rotational speed of the side extraction pulley (54) of the closure chain extraction part (50) is set below the rotational speed of the side supply pulley (34) of the blank sheet supply part (20).

8. The device for sewing fastening chains according to claim 1 or 2, wherein a side pulley 10 of the sewing machine (72) of the sewing machine (16) and each drive pulley (46, 66) of each of the continuously variable transmission machines (32, 52) are rotatably connected to a rotating shaft of the drive motor (30) respectively via ring belts (44, 64, 70).