Zipper chain sewing apparatus

Abstract

The present invention provides a zipper chain sewing device which is simple in structure and can reliably and beautifully sew a zipper chain. The zipper chain sewing device has a zipper chain supply section (14) which continuously supplies a zipper chain (12) of a zipper, and a blank sheet supply section (20) which continuously supplies a plurality of blank sheets (22) to be sewn to the zipper chain (12). The present invention includes a sewing machine (16) which sews the blank sheets (22) to the zipper chain (12), and a zipper chain extraction section (50) which extracts the zipper chain (12) with the blank sheets (22) sewn thereto. The blank sheet supply section (20), the sewing machine (16), and the zipper chain extraction section (50) are driven by one drive motor (30), and the blank sheet supply section (20) and the zipper chain extraction section (50) are respectively driven by the drive motor (30) via stepless speed change mechanisms (32), (52).

Description

TECHNICAL FIELD

[0001] The present application relates to a slide fastener chain sewing device that sews a cloth for clothing or other members continuously to a fastener chain of a slide fastener. BACKGROUND

[0002] Conventionally, as disclosed in Patent Document 1, there is a sewing machine that sews a blank piece of a fly of pants or the like continuously to a fastener chain of a slide fastener. The sewing machine includes a transfer section provided on an upstream side of a transfer path between a supply section of the blank piece and a sewing machine, and a transfer speed adjusting section provided on a downstream side of the transfer path. The transfer section has driving rollers and support rollers arranged facing each other, and the blank piece is held between the rollers and transferred. The transfer speed of the blank piece of the transfer speed adjusting section is set lower than the transfer speed of the blank piece of the transfer section, and the sewing speed of the sewing machine is set lower than the transfer speed of the transfer speed adjusting section. With respect to these speed controls, the feed speeds are adjusted by synchronizing the respective driving rollers with each other by servo motors.

[0003] [Related Art Documents]

[0004] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Laid-Open No. 2006-158705 SUMMARY

[0006] [Problems to be Solved by the Invention]

[0007] In the case of the background art, the driving speed of the sewing machine, the feed speed of the blank piece, and the feed speed of the fastener chain are adjusted by controlling a plurality of servo motors provided in each section respectively, and thus the control is difficult and the structure of the device is complicated, and there is a problem that maintenance and the like is also difficult. Further, there is a problem that the blank piece or the tape portion of the fastener chain shrinks and a gap is generated between the blank pieces or between the blank piece and the fastener chain when the blank piece is sewn to the fastener chain.

[0008] The present application was made in view of the problems of the background art, and aims to provide a slide fastener chain sewing device that is simple in structure and can be sewn reliably and aesthetically.

[0009] [Technical Means for Solving the Problems]

[0010] The present invention is a zipper chain sewing device including: a zipper chain supply section that continuously supplies a zipper chain of a zipper; a blank sheet supply section that continuously supplies a plurality of blank sheets to be sewn to the zipper chain; a sewing machine that sews the blank sheets to the zipper chain; and a zipper chain extraction section that extracts the zipper chain with the blank sheets sewn thereto, the blank sheet supply section, the sewing machine, and the zipper chain extraction section being driven by one drive motor, the blank sheet supply section and the zipper chain extraction section each being driven by the drive motor via a continuously variable transmission.

[0011] The drive motor is continuously rotated, and the continuously variable transmission is intermittently driven, and the blank sheets are sewn to the zipper chain by the sewing machine.

[0012] The blank sheet supply section includes a supply side pulley driven by the drive motor via one of the continuously variable transmissions, and a supply side endless belt that is rotated by the supply side pulley, and the blank sheets are conveyed by the rotation of the supply side endless belt.

[0013] The supply side endless belt that is rotated by the supply side pulley faces a pressing member such as a pressing endless belt that presses the supply side endless belt, and the blank sheets are supplied to the sewing machine by being sandwiched by the supply side endless belt and the pressing endless belt.

[0014] The zipper chain extraction section includes an extraction side pulley driven by the drive motor via the other continuously variable transmission, and a support member such as a driven roller that faces the extraction side pulley, and the zipper chain to which the blank sheets are sewn is extracted by being sandwiched by the extraction side pulley and the support member. The extraction side pulley is linked to the other continuously variable transmission by an extraction side endless belt.

[0015] The supply side pulley of the blank sheet supply section and the extraction side pulley of the zipper chain extraction section adjust the continuously variable transmissions, and the rotational speed of the extraction side pulley of the zipper chain extraction section is set lower than the supply side pulley of the blank sheet supply section.

[0016] A sewing machine side pulley of the sewing machine and each drive pulley of each continuously variable transmission are rotatably linked to a rotational shaft of the drive motor by endless belts, respectively.

[0017] [Effects of the Invention]

[0018] The zipper chain sewing device of the present application uses one driving motor to drive the blank sheet supply section, the zipper chain extraction section and the sewing machine respectively, and has simple structure and easy maintenance. The driving speeds of the blank sheet supply section and the zipper chain extraction section can be accurately adjusted by using the stepless speed changer respectively, and the supply speed of the blank sheet and the extraction speed of the zipper chain can be individually optimally controlled. Especially, by setting the rotation speed of the extraction side pulley of the zipper chain extraction section slightly lower than that of the supply side pulley of the blank sheet supply section, the contraction of the blank sheet and the zipper chain during sewing can be absorbed, and the sewing can be performed in an attractive manner, and the blank sheet of the sewed zipper is not easy to have a gap. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 Fig. 1 is a schematic perspective view of a zipper chain sewing device according to an embodiment of the present application.

[0020] Fig. 2 Fig. 2 is a schematic front view of the zipper chain sewing device according to the embodiment of the present application.

[0021] Fig. 3 Fig. 3 is a schematic plan view showing a driving motor and a stepless speed changer of the zipper chain sewing device according to the embodiment of the present application.

[0022] Fig. 4 Fig. 4 is a perspective view showing a main part of the zipper chain sewing device according to the embodiment of the present application.

[0023] [EXPLANATION OF REFERENCE NUMERALS]

[0024] 10: zipper chain sewing device

[0025] 12: zipper chain

[0026] 14: zipper chain supply section

[0027] 16: sewing machine

[0028] 17: sliding surface

[0029] 17a: sewing needle hole

[0030] 18, 45, 55, 65, 75: adjusting pulley

[0031] 20: blank sheet supply section

[0032] 22: blank sheet

[0033] 24: blank sheet feeding section

[0034] 26: feeding endless belt

[0035] 28: carrying-in roller

[0036] 29, 60: driven roller

[0037] 30: drive motor

[0038] 31: motor pulley

[0039] 32, 52: continuously variable transmission

[0040] 33: infeed motor

[0041] 34: supply side pulley

[0042] 35: diverting pulley

[0043] 36, 46, 56, 66: drive pulley

[0044] 37: infeed endless belt

[0045] 38: supply side endless belt

[0046] 40: driven pulley

[0047] 42: extrusion endless belt

[0048] 44: supply side drive belt

[0049] 48, 68: adjustment handle

[0050] 50: zipper chain extraction portion

[0051] 54: extraction side pulley

[0052] 58: extraction side endless belt

[0053] 62: operation lever

[0054] 64: extraction side drive belt

[0055] 70: sewing machine endless belt

[0056] 72: sewing machine side pulley

[0057] 74: operation disc DETAILED DESCRIPTION

[0058] Hereinafter, an embodiment of the present application will be described based on the drawings. Figs. 1-4 A zipper chain sewing device according to one embodiment of the present application is shown. The zipper chain sewing device 10 according to the present embodiment has a zipper chain supply portion 14 that continuously supplies a zipper chain 12, which is a lengthwise connection of a zipper tape on which a fastener is mounted. The zipper chain supply portion 14 winds the long zipper chain 12 around a roller or the like not shown, in a manner that enables continuous supply of the zipper chain 12 from above to a sewing machine 16 described later. In the vicinity of the sewing machine 16, three adjustment pulleys 18 for adjusting the tension of the zipper chain 12 to stably supply the zipper chain 12 are included.

[0059] The sewing machine 16 is provided in the vicinity of a position where the slide fastener chain 12 supplied from above is turned to the horizontal direction by the lower end adjusting pulley 18. Here, regarding the sewing machine 16, the sewing needle or other structures are omitted. The sewing machine 16 does not include a feeding mechanism, and the slide fastener chain 12 is intermittently drawn out by the slide fastener chain drawing-out section 50 described later, and the sewing and movement of the blank sheet 22 described later are repeatedly performed. The unillustrated needle of the sewing machine 16 penetrates the sewing needle hole 17a formed in the slide surface 17 on which the slide fastener chain 12 is placed so as to move in the horizontal direction, and is provided so as to be able to sew the slide fastener chain 12 and the blank sheet 22.

[0060] The blank sheet supply section 20 supplies, for example, the blank sheet 22 of the fly front portion of pants to be sewn to the slide fastener chain 12 continuously, so as to overlap the slide fastener chain 12 fed to a prescribed position of the sewing machine 16. The blank sheet supply section 20 is linked to the drive motor 30 positioned below the sewing machine 16, and sends out a plurality of unillustrated blank sheets 22 one by one in the horizontal direction, and supplies them to the sewing machine 16 side.

[0061] The blank sheet supply section 20 includes a pair of supply side pulleys 34 driven via a continuously variable transmission 32, a turning pulley 35 positioned below the supply side pulleys 34, and a drive pulley 36 provided to the continuously variable transmission 32. The supply side endless belt 38 is stretched between the pair of supply side pulleys 34, the turning pulley 35, and the drive pulley 36 provided to the continuously variable transmission 32.

[0062] The rotation axes of the pair of supply side pulleys 34 are arranged on the horizontal plane, and the supply side endless belt 38 between the pair of supply side pulleys 34 is also positioned on the horizontal plane. A pressing endless belt 42 is provided, which faces the supply side endless belt 38 between the pair of supply side pulleys 34, is stretched between a pair of driven pulleys 40, and presses the supply side endless belt 38.

[0063] A blank sheet feeding section 24 of the blank sheet 22 is provided on the upstream side with respect to the feeding direction of the blank sheet 22 of the blank sheet supply section 20, and in the vicinity of the upstream side of the supply side pulleys 34. In the blank sheet feeding section 24, a plurality of in-feed rollers 28 are provided, which are driven by a feeding endless belt 26, and the in-feed roller 28 on the upstream end in the feeding direction is connected to an in-feed motor 33 via an in-feed endless belt 37. A driven roller 29 is provided above the in-feed rollers 28 so as to face them in a manner capable of pressing and holding the in-fed blank sheet 22.

[0064] The continuously variable transmission 32 includes a drive pulley 46 that is coupled to the motor pulley 31 coaxial with the drive motor 30 via a supply side drive belt 44. Between the motor pulley 31 and the drive pulley 46, an adjustment pulley 45 that adjusts the tension of the supply side drive belt 44 is provided. The drive pulley 36 and the drive pulley 46 are set in such a manner that rotation transmitted from the drive motor 30 to the drive pulley 46 is decelerated to a prescribed deceleration ratio in the continuously variable transmission 32, and is transmitted from the drive pulley 36 to the supply side endless belt 38. In the continuously variable transmission 32, an adjustment handle 48 that manually adjusts the deceleration ratio is provided.

[0065] Downstream of the sewing machine 16 in the conveyance direction of the slide fastener chain 12, a slide fastener chain extraction section 50 that extracts the slide fastener chain 12 in a state in which the blank sheet 22 is sewn to the slide fastener chain 12 is provided.

[0066] The slide fastener chain extraction section 50 also includes a pair of extraction side pulleys 54 that are coupled to the drive motor 30 and are driven via the continuously variable transmission 52, an adjustment pulley 55 for adjusting the tension that is located below the extraction side pulleys 54, and a drive pulley 56 that is provided to the continuously variable transmission 52. The extraction side endless belt 58 is stretched between the extraction side pulleys 54 and the drive pulley 56 of the continuously variable transmission 52.

[0067] The driven roller 60 is located above the extraction side pulleys 54 in opposition to the extraction side pulleys 54. The driven roller 60 is provided so as to be capable of moving up and down between a position in which the driven roller 60 is pressed against the extraction side pulleys 54 and a position in which the driven roller 60 is retracted upward by a lever 62.

[0068] The continuously variable transmission 52 also includes a drive pulley 66 that is coupled to the motor pulley 31 coaxial with the drive motor 30 via an extraction side drive belt 64. Between the motor pulley 31 and the drive pulley 66, an adjustment pulley 65 that adjusts the tension of the extraction side drive belt 64 is provided. The drive pulley 56 and the drive pulley 66 are set in such a manner that rotation transmitted from the drive motor 30 to the drive pulley 66 is decelerated to a prescribed deceleration ratio in the continuously variable transmission 52, and is transmitted from the drive pulley 56 to the supply side endless belt 58. In the continuously variable transmission 52, an adjustment handle 68 that manually adjusts the deceleration ratio is also provided.

[0069] The motor pulley 31, which is fixed coaxially with the rotation shaft of the driving motor 30, has the supply side driving belt 44, the supply side driving belt 64, and the sewing machine loop belt 70, which is installed on the sewing machine 16 side, wound thereon. The sewing machine loop belt 70 is wound between the motor pulley 31 and a sewing machine side pulley 72, which drives the sewing machine 16, and an adjustment pulley 75, which adjusts the tension of the sewing machine loop belt 70, is provided midway through the sewing machine loop belt 70. The sewing machine side pulley 72 has the operation disc 74 fixed coaxially thereto, and is configured so that the position of the needle of the sewing machine 16 and the like can be adjusted manually.

[0070] The driving mechanisms, such as the continuously variable transmission 32, the continuously variable transmission 52, and the driving motor 30, are located laterally to the blank sheet supply section 20 and the slide fastener chain extraction section 50, and are protected by being housed in the protection mechanism housing 76.

[0071] According to the above-described configuration, the driving motor 30 is connected to and drives the two continuously variable transmissions 32 and 52 and the sewing machine 16, and the blank sheet supply section 20, the slide fastener chain extraction section 50, and the sewing machine 16 are configured so as to perform predetermined operations by one driving motor 30. Here, the motor 30 is continuously rotated at a predetermined rotation speed, and the driving pulleys 46 and 66 of the continuously variable transmissions 32 and 52 are each set so as to be intermittently driven in response to the movement of the needle of the sewing machine 16.

[0072] Next, the operation and effects of the slide fastener chain sewing device 10 of the present embodiment will be described below. The slide fastener chain sewing device 10 sequentially feeds the blank sheets 22 one by one from an upstream, non-illustrated blank sheet carrying-out device to the blank sheet feed section 24, and a piece of the blank sheet 22 is clamped by the carrying-in roller 28 and the driven roller 29 of the blank sheet feed section 24, and is fed by the rotation of the carrying-in roller 28.

[0073] The fed blank sheet 22 is inserted one by one between the supply side loop belt 38 and the pressing loop belt 42 of the blank sheet supply section 20. The blank sheet supply section 20 drives the supply side loop belt 38 by the driving pulley 36, which rotates at a predetermined rotation speed, via the continuously variable transmission 32 by the rotation of the driving motor 30. The carrying speed of the blank sheet 22 of the blank sheet supply section 20 is set to be slightly lower than the feeding speed of the blank sheet 22 of the upstream blank sheet feed section 24 by the setting of the rotation speeds of the continuously variable transmission 32 and the carrying-in motor 33.

[0074] At this time, the zipper chain extraction section 50 also rotates the driving pulley 56 by the same driving motor 30 via the continuously variable transmission 52, thereby extracting the zipper tape of the zipper chain 12 and the blank sheet 22. At this time, the rotation speed of the driving pulley 56 is set to be, for example, about 5% slower than that of the driving pulley 36, taking into account the contraction due to the sewing of the blank sheet 22 to the zipper chain 12. By the rotation of the driving pulley 56, the zipper chain 12 and the blank sheet 22 are slid downward along the lower slide guide 78 in synchronization with the sewing of the sewing machine 16 by the extraction-side pulley 54 and the driven roller 60, and are extracted to the next step.

[0075] As for the operation of the driving motor 30 and the continuously variable transmissions 32, 52 at the time of sewing the zipper chain 12 and the blank sheet 22, the driving motor 30 is continuously rotated, and the continuously variable transmissions 32, 52 are intermittently driven in synchronization with the movement of the needle of the sewing machine 16. As for the intermittent driving, the movement of the needle of the sewing machine 16 is stopped during the needle is inserted into the zipper tape of the zipper chain 12 and the blank sheet 22, and if the needle of the sewing machine 16 is withdrawn from the zipper tape and the blank sheet 22, the continuously variable transmissions 32, 52 are rotated by the driving motor 30 by a predetermined angle. Thus, the zipper chain 12 and the blank sheet 22 are moved by the pitch of the needle of the sewing machine 16, the continuously variable transmissions 32, 52 are stopped again, and the needle of the sewing machine 16 is inserted into the zipper tape and the blank sheet 22. The above operation is repeated, and the blank sheet 22 is sewn to the zipper chain 12 by the sewing machine 16.

[0076] The zipper chain sewing device 10 according to the embodiment is a simple structure in which the number of driving motors is minimized because the blank sheet feeding section 20, the zipper chain extraction section 50, and the sewing machine 16 are respectively driven by one driving motor 30, and the maintenance of the device is easy. Further, the driving speeds of the blank sheet feeding section 20 and the zipper chain extraction section 50 can be accurately adjusted by the continuously variable transmissions 32, 52, respectively, and the feeding speed of the blank sheet 22 and the extraction speed of the zipper chain 12 can be optimally controlled, respectively. In particular, by setting the rotation speed of the extraction-side pulley 54 of the zipper chain extraction section 50 to be lower than that of the feeding-side pulley 34 of the blank sheet feeding section 20 by a predetermined ratio, the blank sheet 22 and the zipper chain 12 can be beautifully sewn, and the blank sheet of the sewn zipper chain is less likely to be spaced apart.

[0077] Moreover, the zipper chain sewing apparatus of the present application is not limited to the above-described embodiment, and the connection of the driving motor of each member to the continuously variable transmission can be made by a power transmission mechanism other than the endless belt, and the connection of the continuously variable transmission to the supply side pulley or the extraction side pulley can be made by a power transmission mechanism other than the endless belt. Furthermore, the pressing endless belt or the driven roller for pressing the raw material sheet or extracting the zipper tape can be a pressing member or a guide member, a sliding member other than the belt or the roller.

Claims

1. A device for sewing a zipper chain, characterized by, The zipper chain feeding section (14) continuously feeds a zipper chain (12) of a zipper; The blank piece feeding section (20) continuously feeds a plurality of blank pieces (22) to be sewn on the zipper chain (12) in turn; The sewing machine (16) sews the blank pieces (22) to the zipper chain (12); and The zipper chain drawing-out section (50) draws out the zipper chain (12) with the blank pieces (22) sewn thereon, The blank piece feeding section (20), the sewing machine (16), and the zipper chain drawing-out section (50) are driven by one drive motor (30), The blank piece feeding section (20) and the zipper chain drawing-out section (50) are each driven by the drive motor (30) via a continuously variable transmission (32, 52), The supply side pulley (34) of the blank piece feeding section (20) and the drawing-out side pulley (54) of the zipper chain drawing-out section (50) are adjusted by each of the continuously variable transmissions (32, 52), and the rotational speed of the drawing-out side pulley (54) of the zipper chain drawing-out section (50) is set lower than that of the supply side pulley (34) of the blank piece feeding section (20), The supply side pulley (34) is driven by the drive motor (30) via one of the continuously variable transmissions (32), The drawing-out side pulley (54) is driven by the drive motor (30) via the other continuously variable transmission (52). The drive motor (30) is continuously rotated, the continuously variable transmissions (32, 52) are intermittently driven, and the blank pieces (22) are sewn to the zipper chain (12) by the sewing machine (16).

2. The slide fastener stitching device of claim 1, wherein The blank piece feeding section (20) includes:

3. The slide fastener stitching device of Claim 1 or 2, wherein The supply side pulley (34) and a supply side endless belt (38) that is rotated by the supply side pulley (34), The blank pieces (22) are carried by the rotation of the supply side endless belt (38). The supply side endless belt (38) that is rotated by the supply side pulley (34) faces a pressing member (42) that presses the supply side endless belt (38), 4. The slide fastener stitching device of claim 3, wherein The blank pieces (22) are fed to the sewing machine (16) by being gripped by the supply side endless belt (38) and the pressing member (42). The zipper chain drawing-out section (50) includes:

5. The slide fastener stitching device of Claim 1 or 2, wherein The drawing-out side pulley (54) and a support member (60) that faces the drawing-out side pulley (54), The zipper chain (12) to which the blank pieces (22) are sewn is drawn out by being gripped by the drawing-out side pulley (54) and the support member (60). The drawing-out side pulley (54) is linked to the other continuously variable transmission (52) by a drawing-out side endless belt (58).

6. The slide fastener stitching device of Claim 5, wherein ​ 7. The slide fastener stitching device of either of claims 1 or 2, wherein, The sewing machine (16) sewing machine side pulley (72) and each of the continuously variable transmission (32, 52) each drive pulley (46, 66) is connected to the drive motor (30) of the rotating shaft by a rotatable annular belt (44, 64, 70).

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