Sewing device

Abstract

The sewing device takes a sewed object obtained by placing a zipper on cloth as a sewing object. Non-sewing tape and sewing tape of the zipper are divided into parallel straight line parts and a pair of branch parts by a puller. The conveying device of the sewing device conveys the sewed object toward a sewing machine while pressing the sewed object on a workbench. The conveying device includes a zipper pressing part, a displacement mechanism that displaces the zipper pressing part, and a conveying mechanism that conveys the zipper pressing part and the displacement mechanism. The tape pressing part in the zipper pressing part includes a straight line part pressing part that presses the straight line part of the non-sewing tape and a branch part pressing part that presses the branch part of the sewing tape. The branch part displacement mechanism in the displacement mechanism corrects the branch part of the sewing tape to a state closer to a straight line relative to the straight line part of the sewing tape compared to the pressed state.

Description

Technical Field

[0001] This utility model relates to a sewing device. The object to be sewn by the sewing device, i.e., the sewn item, is fabric and a zipper overlapping thereon. The sewing device includes: a worktable; a sewing machine; and a conveying device that presses the sewn item against the worktable while conveying the sewn item toward the sewing machine. Background Technology

[0002] As an example of the aforementioned sewing device, there is a known device in which, in order to sew one of the two straps of the zipper (the sewing strap) to the front placket fabric, the other strap (the non-sewing strap) is pressed from above while the work to be sewn is fed toward the sewing machine (Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 6423568

[0006] exist Figure 12 The image shows a sewn object 90 sewn by the aforementioned sewing device. With the zipper 91 closed, a pair of straps 92a and 92b form parallel straight sections (parts where a pair of chain teeth mesh) and branch sections that branch into two forks, with the zipper head 93 as the boundary.

[0007] The aforementioned sewing device performs sewing while pressing the straight section of the non-sewing tape 92b. As a result, the zipper 91, while mounted on the fabric 94, is fed towards the sewing machine along with the fabric 94, as is clearly seen. Figure 2 As shown, in the sewing tape 92a, the branch portion is sewn to the fabric 94 at an angle relative to the straight portion. The sewn finished product is sold to customers, and some customers prefer that the straight portion and the branch portion of the sewing tape be sewn to the fabric product in a nearly straight line. Utility Model Content

[0008] The purpose of this invention is to provide a sewing device that enables the straight portion and branch portion of the sewing tape to be sewn onto the fabric in a manner that is as close as possible to a straight line.

[0009] The object to be sewn by the sewing device of this invention is a zipper placed on fabric. The zipper's two straps are divided by the zipper pull into a parallel straight section and a pair of branched sections that fork into two branches. The sewing device of this invention includes: a worktable; a sewing machine that sews the sewing strap (one of the two straps) to the fabric; and a conveying device that presses the object to be sewn against the worktable while conveying the object towards the sewing machine.

[0010] The conveying device includes: a zipper pressing component that presses the workpiece on the worktable from above the zipper; a displacement mechanism that displaces the zipper pressing component to position the workpiece in a sewing posture; and a conveying mechanism that conveys the zipper pressing component and the displacement mechanism toward the sewing machine.

[0011] The zipper pressing component includes a belt pressing component that presses down on a pair of belts.

[0012] The pressing component includes: a pressing component for a straight section, which presses the straight section of the non-sewn tape, which is one of a pair of tapes; and a pressing component for a branch section, which presses the branch section of the sewn tape.

[0013] The displacement mechanism includes: a straight section displacement mechanism for displacing a straight section pressing member between a separation position and a pressing position relative to the straight section of the non-seamless tape; and a branch section displacement mechanism for displacing a branch section pressing member between a separation position, a pressing position, and a straightening position relative to a branch section of the seamless tape.

[0014] When correcting the position, compared to the state where it is pressed in the pressing position, the branch of the sewing tape is corrected to be closer to a straight line relative to the straight part of the sewing tape.

[0015] The zipper pressing component can be either a single pressing component or not. When the zipper pull is parallel to the upper surface of the worktable, the sewing tape floats (moves away) from the fabric in the width direction near the pair of grooves, corresponding to the height of the grooves. As a result, when sewing near the width direction of the zipper pull, it is difficult to form a straight stitch. To ensure that the stitch is nearly straight even when sewing near the width direction of the zipper pull, the following method is preferred.

[0016] In addition to the belt pressing component, the zipper pressing component also has a zipper head pressing component for pressing the zipper head. Besides the belt displacement mechanism, which includes a displacement mechanism for the straight section and a displacement mechanism for the branch section, the displacement mechanism also has a zipper head displacement mechanism for displacing the zipper head pressing component between a separated position and a pressed position relative to the zipper head. When viewed from the conveying direction, the zipper head has belt grooves on two faces in the width direction for a pair of belts to pass through, and the zipper head pressing component has a first pressing surface for pressing the upper surface of the zipper head. The first pressing surface is an inclined surface relative to the upper surface of the worktable, and one of the belt grooves for the sewing belt to pass through is closer to the upper surface of the worktable than the other of the belt grooves for the non-sewing belt to pass through.

[0017] The zipper pull pressing component may or may not have only a first pressing surface. To ensure the stability of the zipper pull pressing state, the following method is preferred.

[0018] In addition to the first pressing surface, the zipper pull pressing component also has a second pressing surface, which presses the zipper pull from the side where the branch of the non-sewn tape is located in the width direction.

[0019] The zipper head displacement mechanism and the branch displacement mechanism can be dedicated components to each other. In the case of dedicated components, the zipper head displacement mechanism only displaces the zipper head pressing member, and the branch displacement mechanism only displaces the branch pressing member. However, to simplify the structure, the following arrangement is preferred.

[0020] The branch displacement mechanism includes: a pressing displacement device that also functions as a pull head displacement mechanism, and is used to move the branch pressing member and the pull head pressing member together between their respective separation positions and their respective pressing positions; and a straightening displacement device that is used to move the branch pressing member between its own pressing position and straightening position.

[0021] According to this invention, after pressing the straight portion of the non-sewing tape with a pressing member in the straight portion, the branch portion is pressed by a pressing member in the pressing position and then moved to the correction position. As a result, compared with the state of being placed on the fabric and remaining as is, the straight portion and the branch portion of the sewing tape can become closer to a straight line and be sewn onto the fabric in this state. Attached Figure Description

[0022] Figure 1 This is a perspective view showing the main parts of the sewing device according to the first embodiment of the present invention.

[0023] Figure 2 This is an explanatory diagram of a sewing machine, showing the sewing device.

[0024] Figure 3 (A) to (D) are top view, bottom view, front view, and left side view of an example of a zipper pull.

[0025] Figure 4 This is a front view of the main parts of the sewing device of the first embodiment, viewed from the conveying direction.

[0026] Figure 5 It means Figure 4 Right-side view of the main part of the sewing device shown.

[0027] Figure 6 It means Figure 5 A top view of the main parts of the sewing device shown.

[0028] Figure 7 (A) to (E) are explanatory diagrams showing the steps of pressing the zipper.

[0029] Figure 8 It is a top view of the object being sewn before it is sewn.

[0030] Figure 9 This is a top view of the sewn item showing its state immediately after the zipper has been pressed.

[0031] Figure 10 It is a top view showing the state in which the branch of the sewing tape is displaced toward the branch of the non-sewing tape.

[0032] Figure 11 This is a top view showing the sewn object sewn by the sewing device of the first embodiment.

[0033] Figure 12 It is a top view showing the sewn object being sewn using existing sewing equipment.

[0034] Figure 13 This is a three-dimensional diagram showing the lifting device.

[0035] Figure 14 This is a top view showing the setup status of the lifting device.

[0036] Figure 15 (A) to (C) are explanatory diagrams showing the operation steps of the lifting device.

[0037] Figure 16 This is a front view of a modified example of the sewing device of the first embodiment, viewed from the conveying direction.

[0038] Figure 17 This is a right-side view of the pickup device.

[0039] Figure 18 This is a left-side view of the pickup device.

[0040] Figure 19 This is the front view of the pickup device.

[0041] Figure 20 This is a side view showing the state of the fabric being rolled up by the pick-up device.

[0042] Explanation of reference numerals in the attached figures

[0043] 1. The object being sewn 2. Fabric

[0044] 2G fabric bundle 3 zippers

[0045] 4a Non-sewn tape (tape) 4b Sewn tape (tape)

[0046] 4a1, 4b1 core rope section 4b2 dotted line

[0047] 4S Straight Line Section 4T Branch Section

[0048] 5-tooth chain, 5L chain tooth row

[0049] 6-inch slider with 6h through hole

[0050] 7 First stop section 8 Second stop section

[0051] 11 Upper wingplate 12 Lower wingplate

[0052] 13 Connecting post 14 Flange

[0053] 15. Pull-out film mounting section 16. Pull-out film

[0054] 16a Shaft section 16b Grip section

[0055] 16c Connecting part, 16h Through hole

[0056] 17 slotted 20, 200 worktable

[0057] 201 The portion on the depth side; 202 The portion near the anterior side.

[0058] 22 Sewing Machine 22a Sewing Machine Body

[0059] 23, 230 Sewing machine presser foot 23a, 231 Fixing part

[0060] 23b, 232 presser foot part 23h pinhole

[0061] 233 Foreleg portion 233a Top of the lower surface of the foreleg portion

[0062] 234 Rear foot 236 Axle

[0063] 24 needles 25 post

[0064] 26 Sewing machine head 26a Connecting rod

[0065] 26b Needle bar 26c Fixing component

[0066] 30 Conveying device; 32 Zipper pressing component

[0067] 34 Displacement mechanism 36 Conveying mechanism

[0068] 41 Moving part; 42 Reciprocating mechanism section

[0069] 43 Electric motor 44 Conversion mechanism

[0070] 46 plates, 50 plates with pressing components

[0071] 51. Pressing component 51a for the straight section, fixing plate

[0072] 51b Pressing plate 55 Branch pressing component

[0073] 55a Intermediate film, 55b Upper film

[0074] 55c lower piece 58 pull head pressing component

[0075] 58a Fixing part; 58b Pressing body

[0076] 58c First pressing surface; 58d Second pressing surface

[0077] 60 Displacement mechanism; 61 Displacement mechanism for linear section (fluid pressure cylinder)

[0078] 61a cylinder, 61b piston rod

[0079] 61c cylinder block, 61d guide rod

[0080] 61e Fixed plate 62 Displacement mechanism for branch section

[0081] 63. Clamping displacement device (fluid pressure cylinder) 63a cylinder

[0082] 63b piston rod, 63c cylinder block

[0083] 63d guide rod, 63e, 63f fixing plate

[0084] 63g upper plate 63h hanging plate

[0085] 64. Correction displacement device (fluid pressure cylinder) 64a cylinder

[0086] 64b Piston rod, 64c Cylinder block

[0087] 64d guide rod, 64e fixing plate

[0088] Displacement device (fluid pressure cylinder) for 64f fixed plate at 65 depth position.

[0089] 65a cylinder, 65b piston rod

[0090] 65c cylinder block, 65d guide rod

[0091] 65e, 65f fixed plate, 65g intermediate plate

[0092] 65h upper plate 65j lower plate

[0093] 69 Pull head displacement mechanism 70 Pick-up device

[0094] 71 Needle 72 Guide plate

[0095] 72a Compacting surface; 72b Loading surface

[0096] 72c lower surface 73 plate

[0097] 73a Pressing surface; 73b Upper surface

[0098] 73d Outward-facing surface 74 Guide component

[0099] 74a Clamping surface 74b Hole

[0100] 74c features a reciprocating device for the 75-type needle (fluid pressure cylinder).

[0101] 75a cylinder, 75b piston rod

[0102] 75c, 75d fasteners, 76 support mechanism

[0103] 76a shaft, 76b top plate

[0104] 76c side plate 77 lifting device (fluid pressure cylinder)

[0105] 77a cylinder, 77b piston rod

[0106] 77c cylinder block, 77d guide rod

[0107] 77e Fixed plate 78 Spatial section

[0108] 80 Rotary device 81 Fluid pressure cylinder

[0109] 81a cylinder, 81b piston rod

[0110] 82 Conversion Mechanism Section 83 First Support Section

[0111] 83a Pin 83b Arm

[0112] 84 Second Support Part 84a Pin

[0113] 84b Connector 85 Restriction Part

[0114] 85a Contact element; 85b Blocking element

[0115] 90 sewn items 91 zippers

[0116] 92a and 92b with 93 pull tab

[0117] 94 Fabric 400 Lifting Device

[0118] 401 lifting plate, 401a longitudinal plate

[0119] 401b Inclined plate, 401h Long hole

[0120] 402 Fluid Pressure Cylinder 402a

[0121] 402b Piston rod, 403 Base

[0122] 404 Connecting Part 405 First Connecting Plate

[0123] 405a, 405b elongated hole 406 second connecting plate

[0124] 406a Lower fixing plate; 406b Rear fixing plate

[0125] 410 Sensor F Frame

[0126] G gap S1 line trace

[0127] X conveying direction, Y depth direction Detailed Implementation

[0128] exist Figure 11 The image shows a sewn object 1 sewn by the sewing device of the first embodiment of this invention. The sewn object 1 is in a state where the fabric 2 and the zipper 3 are sewn together. As an example of the fabric 2, it may have a front placket.

[0129] In the following description of zipper 3, terms such as length direction, width direction, vertical direction, horizontal direction, front-back direction, and thickness direction will be used. These directions are based on the assumption that zipper 3 is positioned horizontally. "Length direction" refers to the direction in which zipper 3 is opened and closed. "Length direction" is also called the front-back direction. "Front direction" refers to the direction in which zipper 3 is closed. Figure 11 The rightward direction. "Backward direction" refers to the direction in which zipper 3 opens. Figure 11 The left direction. "Width direction" refers to the direction perpendicular to the length direction when viewed from above (viewing zipper 3 from above). Figure 11 The vertical direction. The "width direction" is also called the horizontal direction. The "vertical direction" refers to the direction orthogonal to both the length and width directions, and is perpendicular to... Figure 11 The direction is perpendicular to the paper surface. The "thickness direction" is consistent with the top and bottom directions.

[0130] Regarding the dimensions of zipper 3, its length is longer than its width. As is well known, zipper 3 includes a pair of straps 4a and 4b, multiple teeth 5, and a slider 6. The pair of straps 4a and 4b face each other in the width direction. Straps 4a and 4b are flexible straps extending along a straight line. Regarding the thickness of the pair of straps 4a and 4b, the facing side edges 4a1 and 4b1 in the width direction are thicker than the outer portions of the side edges 4a1 and 4b1 in the width direction. These side edges 4a1 and 4b1 are also referred to as the core cord portion. The multiple teeth 5 are fixed to the facing side edges 4a1 and 4b1 of the pair of straps 4a and 4b at intervals in the length direction. All the teeth 5 fixed to each strap 4a and 4b constitute a tooth row 5L. Therefore, zipper 3 has a pair of tooth rows 5L at its central portion in the width direction. The slider 6 opens and closes the pair of tooth rows 5L.

[0131] In addition, the zipper 3 includes a first stop 7 and a second stop 8, which collide with the zipper head 6 to limit the two ends of the movement range of the zipper head 6.

[0132] The first stop 7 defines the boundary position of one side of a pair of chain teeth 5L within the movement range of the zipper pull 6. In the example shown, the first stop 7 is fixed to opposing side edges 4a1 in a belt 4a.

[0133] The second stop 8 defines the boundary position of the open side of a pair of chain teeth 5L within the movement range of the zipper pull 6. In the example shown, the second stop 8 is fixed in such a way that it covers the opposing side edges 4a1 and 4b1 of a pair of straps 4a and 4b. One side of the second stop 8 in the width direction is fixed to one strap 4a, and the other side of the second stop 8 in the width direction is fixed to another strap 4b.

[0134] The zipper 3 is in a closed state with a pair of chain teeth 5L, in other words, in a state where the zipper head 6 is in contact with the first stop 7. This state is characterized by adjacent chain teeth 5 engaging with each other among all the chain teeth 5 between the zipper head 6 and the second stop 8. Furthermore, the pair of straps 4a and 4b are divided by the zipper head 6 into a straight section 4S extending in a straight line and a pair of branch sections 4T branching into two forks. The straight section 4S, due to the engagement of the pair of chain teeth 5L, makes the pair of straps 4a and 4b a single piece. In the case of the workpiece 1 before sewing, viewed from above, as... Figure 8 As shown, the pair of branches 4T are inclined relative to the length direction and are symmetrical relative to the length direction. The width spacing of the pair of branches 4T gradually increases as they move away from the straight section 4S in the length direction. The strip 4b that is sewn together is called the sewing strip 4b, and the strip 4a that is not sewn is called the unsewn strip 4a. Furthermore, as... Figure 11 As shown, stitch S1 is formed in the sewn object 1.

[0135] like Figure 3 As shown, the slider 6 includes an upper flange 11, a lower flange 12, a connecting post 13, a flange 14, a tab mounting part 15, and a tab 16. The standard state of the slider 6 is when the tab 16 is positioned above the upper flange 11. The "reverse state" refers to a state in which the slider is reversed from the standard state. When describing the slider 6 separately, the slider 6 is in its standard state unless otherwise mentioned.

[0136] The upper wing plate 11 and the lower wing plate 12 face each other at a distance in the vertical direction. A connecting post 13 extends vertically and connects the front portions of the upper wing plate 11 and the lower wing plate 12 at their midpoints in the horizontal direction. Flanges 14 protrude from the left and right side edges of the upper wing plate 11 and the lower wing plate 12 in a direction that narrows the vertical distance between the facing upper wing plates 11 and 12. A pull tab mounting portion 15 protrudes upward from the upper wing plate 11 and faces the center portion in the width direction of the upper surface of the upper wing plate 11. A through hole 6h is formed between the pull tab mounting portion 15 and the upper wing plate 11 in a horizontal direction for the pull tab 16 to pass through. A pair of chain teeth 5L passes through between the upper wing plate 11 and the lower wing plate 12. Four flanges 14 hold the pull head 6 in a manner that prevents it from disengaging from the pair of chain teeth 5L in the width direction. On both sides in the width direction, between the opposing flanges 14 in the vertical direction, the corresponding side of the strips 4a and 4b pass through in the front-to-back direction. That is, a pair of grooves 17 are formed on the two sides of the pull head 6 in the width direction for the pair of strips 4a and 4b to pass through.

[0137] A through hole 16h is formed in the pull tab 16 for the pull tab mounting portion 15 to pass through. Viewed from the width direction, the pull tab 16 is positioned above the upper wing plate 11 and supported in a manner that allows it to rotate relative to the pull tab mounting portion 15. When the pull tab 16 is not being operated, it is placed on the upper surface of the upper wing plate 11 in a state extending in the front-rear direction. The pull tab 16 includes: a shaft portion 16a, which is the center of rotation; a gripping portion 16b, which is gripped during operation; and a pair of connecting portions 16c, which connect the shaft portion 16a and the gripping portion 16b, which are radially separated from each other by the shaft portion 16a. The shaft portion 16a, the gripping portion 16b, and the pair of connecting portions 16c are arranged to surround the outside of the through hole 16h. The pair of connecting portions 16c are arranged left and right relative to the pull tab mounting portion 15, connecting the left and right ends of the shaft portion 16a and the left and right ends of the gripping portion 16b. When the pull tab 16 is not operated, the shaft portion 16a and the gripping portion 16b are arranged in a state where they are far apart in the front-rear direction. Furthermore, the gripping portion 16b is arranged on the rear side relative to the shaft portion 16a.

[0138] In zipper 3, since a pair of chain teeth 5L penetrates the zipper pull 6, the zipper pull 6 is in a state that protrudes vertically compared to the pair of chain teeth 5L. As a result, when zipper 3 is placed on a horizontal surface, within the length direction of zipper 3, the area of ​​zipper pull 6 is in a state of floating (unstable) relative to the horizontal surface at the side edges with opposing sides 4a and 4b, compared to the area of ​​the closed pair of chain teeth 5L. This instability occurs whether zipper pull 6 is in a standard state or a reverse state.

[0139] In the slider 6, in the vertical direction, the upper surface of the pull tab mounting portion 15 is positioned above the upper surface of the pull tab 16, and the upper surface of the pull tab 16 is positioned above the upper surface of the upper wing plate 11. Furthermore, in the horizontal direction, the upper surface of the pull tab mounting portion 15 is positioned at the middle of the slider 6, and the pull tab 16 extends horizontally relative to the pull tab mounting portion 15. Additionally, the lower surface of the lower wing plate 12 is flat. As a result, when the slider 6 is placed on a horizontal surface, the reverse state becomes less stable than the standard state, and the slider 6 is prone to tilting relative to the horizontal direction.

[0140] Item 1 (sewn) Figure 8 The zipper 3 is aligned with the fabric 2 as shown. In the sewn object 1, the zipper 3 is in the closed state, and the zipper pull 6 is in the reversed state. As a result, the sewn object 1 is in a state where the zipper pull 16 and the zipper pull mounting portion 15 face the fabric 2, and the lower wing plate 12 is positioned above the upper wing plate 11. In addition, in the sewn object 1, the fabric 2 protrudes to both sides in the width direction of the zipper 3.

[0141] like Figure 1 As shown, the sewing apparatus of the first embodiment of this utility model includes a worktable 20, a sewing machine 22, and a conveying device 30. The conveying device 30 presses the workpiece 1 to be sewn against the worktable 20 while conveying the workpiece 1 straight toward the sewing machine 22. That is, the direction in which the workpiece 1 is conveyed (hereinafter referred to as the "conveyor direction" X) is a straight line. Furthermore, the upper surface of the worktable 20 is a horizontal plane. The direction orthogonal to the conveyor direction X when viewed from above the worktable 20 is called the "depth direction" Y. One side of the depth direction Y is called the "near-front side," and the other side of the depth direction Y is called the "depth side." The sewing tape 4b is disposed on the depth side, and the non-sewing tape 4a is disposed on the near-front side.

[0142] like Figure 1 , Figure 2 As shown, the sewing machine 22 includes: a sewing machine body 22a, which sews the workpiece 1; and a sewing machine presser foot 23, which presses down on the workpiece 1.

[0143] The sewing machine body 22a is a known device that forms a stitch S1 on the workpiece 1 by tangling the top thread passing through the needle 24 and the bottom thread supplied to the underside of the needle eye on the worktable 20. The top thread, bottom thread, and needle eye are not shown in the figure. Incidentally, in this embodiment, the sewing machine body 22a is a flatbed sewing machine, which, in coordination with the conveying device 30, forms a dotted and straight stitch S1 on the workpiece 1.

[0144] like Figure 2 As shown, the sewing machine body 22a includes: a base portion disposed below the worktable 20 (not shown); a column portion 25 erected from the base portion; and a sewing machine head 26 extending from the upper part of the column portion 25. The base portion and the sewing machine head 26 face each other in the vertical direction and extend along the depth direction Y. The column portion 25 extends in the vertical direction in a configuration where it is sandwiched between the depth side of the base portion and the depth side of the sewing machine head 26.

[0145] The base section has a built-in mechanism for winding the bottom thread and the top thread. The column section 25 has a built-in mechanism for linking, for example, the internal mechanism of the sewing machine head 26 and the internal mechanism of the base section.

[0146] The sewing machine head 26 includes a sewing machine head housing (reference numerals omitted) forming its outline and internal mechanisms housed within the sewing machine head housing. Incidentally, these internal mechanisms include a pointer lever drive mechanism, a take-up lever drive mechanism, and a presser foot drive mechanism, etc. A connecting rod 26a of the presser foot drive mechanism protrudes downward from the lower surface of the top of the sewing machine head housing. The presser foot 23 is fixed to the lower end of the connecting rod 26a.

[0147] like Figure 1 , Figure 2 As shown, the sewing machine presser foot 23 includes: a fixing part 23a, which is fixed to the connecting rod 26a and extends downward; and a presser foot part 23b, which extends from the lower end of the fixing part 23a in a direction opposite to the feed direction X. A needle hole 23h is formed in the presser foot part 23b, extending through in the vertical direction. In the example shown, two needle holes 23h are formed at intervals in the depth direction Y.

[0148] Furthermore, the needle bar 26b of the needle bar drive mechanism protrudes downward from the lower surface of the top of the sewing machine head housing. The needle 24 is mounted to the lower end of the needle bar 26b in a downward-extending state via a fixing member 26c. In the example shown, two needles 24 are mounted to the fixing member 26c corresponding to two needle holes 23h, spaced apart in the depth direction Y. The needles 24 are displaced vertically via the needle bar drive mechanism, penetrating the needle holes 23h.

[0149] like Figures 4-6As shown, the conveying device 30 includes: a zipper pressing component 32 that presses the zipper 3; a displacement mechanism 34 that displaces the zipper pressing component 32; a conveying mechanism 36 that conveys the zipper pressing component 32 and the displacement mechanism 34 toward the sewing machine 22; and a control device that controls the displacement mechanism 34 and the conveying mechanism 36 (not shown).

[0150] The conveying mechanism 36 causes the zipper pressing member 32 and the displacement mechanism 34 to reciprocate linearly between a location (first location) away from the sewing machine 22 in the opposite direction to the conveying direction X and a location (second location) away from the conveying direction X. The first location is where the zipper 3 is placed on the fabric 2, and is also where the conveying mechanism 36 begins to convey the workpiece 1 towards the sewing machine 22. The second location is where the conveying mechanism 36 ends its conveying of the workpiece 1 towards the conveying direction X.

[0151] The conveying mechanism 36 includes: a movable member 41 for fixing the displacement mechanism 34; and a reciprocating mechanism 42 that reciprocates the movable member 41 in a direction opposite to the conveying direction X and in the conveying direction X. In this embodiment, the reciprocating mechanism 42 converts rotary motion into linear reciprocating motion. Specifically, the reciprocating mechanism 42 includes: a motor 43 as the drive source for rotary motion; and a conversion mechanism 44 extending above the worktable 20 along the conveying direction X, and converting the rotary motion of the motor 43 into the reciprocating motion of the movable member 41. The reciprocating mechanism 42 integrates the motor 43 and the conversion mechanism 44. A portion of the conversion mechanism 44 may use, for example, a ball screw. Furthermore, a frame F is provided in the sewing device. The reciprocating mechanism 42 is fixed to the frame F.

[0152] like Figure 1 , Figures 4-6 As shown, the zipper pressing component 32 includes: a belt pressing component 50 that presses a pair of belts 4a, 4b; and a zipper head pressing component 58 that presses the zipper head 6.

[0153] The pressing member 50 includes: a straight section pressing member 51 that presses the straight section 4S of the non-seam tape 4a; and a branch section pressing member 55 that presses the branch section 4T of the seam tape 4b.

[0154] The straight section pressing member 51 presses the straight section 4S of the unstitched tape 4a within a range that is far away from the pair of chain teeth 5L in the width direction (near the front side in the depth direction Y). The straight section pressing member 51 is a bent plate. The straight section pressing member 51 is L-shaped when viewed from the transport direction X. The straight section pressing member 51 includes: a fixing plate 51a for fixing to the displacement mechanism 34; and a pressing plate 51b for pressing the unstitched tape 4a. When viewed from the transport direction X, the pressing plate 51b extends downward from the end of the fixing plate 51a on the depth side in the depth direction Y. The fixing plate 51a and the pressing plate 51b are flat plates. When the straight section pressing member 51 presses the unstitched tape 4a, the pressing plate 51b is parallel to the transport direction X and the vertical direction, and the fixing plate 51a is horizontal. The pressing component 55 for the branch section will be described later.

[0155] like Figure 10 As shown, in a top-view view of the sewing device during the sewing process, the zipper pull 6 and the zipper pressing member 32 are positioned near the front of the sewing machine presser foot 23 in the depth direction Y. A gap G in the depth direction Y is formed between the trajectory of the zipper pressing member 32 and the sewing machine presser foot 23. As a result, the zipper pressing member 32 is conveyed in a manner that prevents it from colliding with the sewing machine presser foot 23 during sewing. Furthermore, in Figure 10 In the middle, the end of the slider 6 on the depth side in the depth direction Y protrudes from the slider pressing member 58, and the end of the slider pressing member 58 on the depth side in the depth direction Y is disposed on the depth side of the branch pressing member 55 in the depth direction Y.

[0156] like Figures 4-6 As shown, the displacement mechanism 34 includes: a belt displacement mechanism 60, which displaces the belt pressing member 50; and a pull head displacement mechanism 69, which displaces the pull head pressing member 58.

[0157] The displacement mechanism 60 includes: a straight section displacement mechanism 61 that displaces the straight section pressing member 51; and a branch section displacement mechanism 62 that displaces the branch section pressing member 55. In this embodiment, a portion of the branch section displacement mechanism 62 also serves as a pull head displacement mechanism 69.

[0158] The linear displacement mechanism 61 moves the linear pressing member 51 between a pressing position where the workpiece 1 is pressed against the worktable 20 from above the non-sewing tape 4a and a separation position where it is separated from the non-sewing tape 4a. The linear displacement mechanism 61 is an actuator capable of reciprocating movement. Specifically, the linear displacement mechanism 61 is an actuator that performs linear reciprocating motion in the vertical direction. Specifically, the linear displacement mechanism 61 is a fluid pressure cylinder 61. The fluid pressure cylinder 61 is a pneumatic cylinder or a hydraulic cylinder, etc. As is well known, the fluid pressure cylinder 61 includes: a cylinder 61a; and a piston rod 61b, which protrudes from the inside of the cylinder 61a to the outside relative to the cylinder 61a and is capable of reciprocating along a straight line. The piston rod 61b protrudes downward relative to the cylinder 61a. The cylinder 61a is fixed to the moving member 41 of the conveying mechanism 36. The fixing piece 51a of the linear pressing member 51 is fixed to the lower end of the piston rod 61b.

[0159] In the example shown, cylinder 61a forms part of cylinder body 61c. Cylinder body 61c has guide holes (not shown) on both the side opposite to the conveying direction X and the side of the conveying direction X, relative to cylinder 61a. Guide rods 61d are guided in the guide holes in a manner that allows them to move vertically. Guide rods 61d protrude downwards from cylinder body 61c. A fixing plate 51a with pressing member 50 is fixed to the lower ends of both guide rods 61d and piston rod 61b by means of fixing plate 61e. Cylinder body 61c is fixed to moving member 41 by means of plate 46. As described above, the linear section connects the conveying mechanism 36 and the linear section with pressing member 51 using displacement mechanism 61.

[0160] The branch displacement mechanism 62 includes: a pressing displacement device 63 that presses the branch 4T of the sewing tape 4b by means of a branch pressing member 55; a correcting displacement device 64 that corrects the position of the branch 4T of the sewing tape 4b; and a depth position displacement device 65 that, independently of the correcting displacement device 64, displaces the branch pressing member 55 in the depth direction Y. In this embodiment, the pressing displacement device 63 and the depth position displacement device 65 also serve as the pull head displacement mechanism 69. Specifically, the pressing displacement device 63 displaces the branch pressing member 55 and the pull head pressing member 58 together in the vertical direction. In addition, the depth position displacement device 65 displaces the branch pressing member 55, the pull head pressing member 58, and the correcting displacement device 64 together in the depth direction Y. Furthermore, the depth position displacement device 65 displaces the zipper press member 58 between the following positions: a separation position where it is directly above the zipper 6, and a separation position (standby position) where it is separated from the separation position near the front side in the depth direction Y. The depth position displacement device 65 displaces the branch press member 55 between the following positions: a separation position (standby position) where it is separated from the branch 4T of the sewing tape 4b near the front side in the depth direction Y, and a separation position where it is separated on the depth side compared to the standby position and is near the front side in the depth direction Y compared to the branch 4T of the sewing tape 4b.

[0161] The pressing displacement device 63 moves the pull head pressing member 58 between the following positions: a pressing position where the sewn workpiece 1 is pressed against the worktable 20 from above the pull head 6, and a separation position where it is directly above the pull head 6. Additionally, the pressing displacement device 63 moves the branch pressing member 55 between the following positions: a pressing position where the sewn workpiece 1 is pressed against the worktable 20 from above the branch 4T of the sewing tape 4b, and a separation position where it is directly above the branch 4T. The pressing displacement device 63 is an actuator that performs linear reciprocating motion in the vertical direction, similar to the linear section displacement mechanism 61. Specifically, the pressing displacement device 63 is a fluid pressure cylinder 63. The fluid pressure cylinder 63 is a structure obtained by reversing the vertical movement of the linear section displacement mechanism 61 (fluid pressure cylinder). The fluid pressure cylinder 63 includes: a cylinder body 63c having a cylinder 63a, a piston rod 63b, and a guide rod 63d. The cylinder body 63c is fixed to the plate 46 on the side opposite to the conveying direction X of the cylinder body 61c of the displacement mechanism 61 for the straight section. Additionally, the piston rod 63b and guide rod 63d are fixed to the depth position displacement device 65 by means of multiple (two) fixing plates 63e and 63f. The two fixing plates 63e and 63f overlap in the vertical direction. The lower fixing plate 63e is fixed to the upper ends of the piston rod 63b and the pair of guide rods 63d. The upper fixing plate 63f is L-shaped when viewed from the depth direction Y (see reference). Figure 5The upper fixed plate 63f includes: an upper plate 63g that overlaps with the lower fixed plate 63e; and a lower plate 63h that hangs down from the upper plate 63g. The lower plate 63h hangs down from the end of the upper plate 63g in the opposite direction to the conveying direction X.

[0162] The depth position displacement device 65 is fixed relative to the lower plate 63h on the side opposite to the cylinder 63c of the clamping displacement device 63. The depth position displacement device 65 is an actuator that performs linear reciprocating motion in the depth direction Y. Specifically, the depth position displacement device 65 is a fluid pressure cylinder 65. The fluid pressure cylinder 65 includes: a cylinder body 65c having a cylinder 65a, a piston rod 65b, and a guide rod 65d. The piston rod 65b protrudes relative to the cylinder 65a toward the depth side in the depth direction Y. In addition, the piston rod 65b and the guide rod 65d are fixed to the correction displacement device 64 by means of multiple (two) fixing plates 65e, 65f. The two fixing plates 65e, 65f coincide in the depth direction Y. The fixing plate 65e near the front is fixed to the piston rod 65b and the guide rod 65d. Figure 4 As shown, the depth-side fixing plate 65f includes: an intermediate plate 65g, which extends along the depth direction Y from the middle portion in the vertical direction when viewed from the conveying direction X; an upper plate 65h, which extends upward from the depth-side end of the intermediate plate 65g; and a lower plate 65j, which extends downward from the near-front end of the intermediate plate 65g. The upper plate 65h is fixed to the near-front fixing plate 65e.

[0163] The corrective displacement device 64 is fixed to the depth side relative to the lower plate 65j. The corrective displacement device 64 displaces the branch pressing member 55 from the pressing position of the branch 4T of the sewing tape 4b to the corrective position. The corrective position is near the front side in the depth direction Y relative to the pressing position. The corrective displacement device 64 is an actuator that performs linear reciprocating motion in the depth direction Y, similar to the depth position displacement device 65. Specifically, the corrective displacement device 64 is a fluid pressure cylinder 64. The fluid pressure cylinder 64 includes: a cylinder body 64c having a cylinder 64a, a piston rod 64b, and a guide rod 64d. The piston rod 64b protrudes relative to the cylinder 64a toward the depth side in the depth direction Y. In addition, the piston rod 64b and the guide rod 64d are fixed to the branch pressing member 55 by means of a fixing plate 64e.

[0164] The branch pressing member 55 is a bent plate. The branch pressing member 55 includes: an intermediate piece 55a, which extends along the depth direction Y from the middle portion in the vertical direction when viewed from the transport direction X; an upper piece 55b, which extends upward from the near-front end of the intermediate piece 55a; and a lower piece 55c, which extends downward from the depth-side end of the intermediate piece 55a. The upper piece 55b is fixed relative to the fixing plate 64e on the depth side in the depth direction Y. The lower end of the lower piece 55c is pressed against the branch portion 4T of the sewing tape 4b.

[0165] The pull head pressing component 58 is fixed to the side of the cylinder 64c of the correction displacement device 64 facing the conveying direction X by means of a fixing plate 64f. In this embodiment, the pull head pressing component 58 is a bent block. When viewed from the conveying direction X, the pull head pressing component 58 is L-shaped. The pull head pressing component 58 includes: a fixing portion 58a for fixing to the fixing plate 64f; and a pressing body 58b for pressing the pull head 6. The pressing body 58b protrudes from the lower part of the fixing portion 58a toward the depth side in the depth direction Y.

[0166] The pressing body 58b includes: a first pressing surface 58c, which presses the upper surface of the pull head 6; and a second pressing surface 58d, which presses the pull head 6 from the branch 4T side of the non-sewn tape 4a.

[0167] The first pressing surface 58c is a downward-facing plane that is inclined relative to the horizontal plane that serves as the upper surface of the worktable 20. The inclination angle θ of the first pressing surface 58c is, for example, 10 degrees to 40 degrees. Furthermore, the first pressing surface 58c is an inclined surface that gradually decreases in elevation from the near-front side towards the depth side in the depth direction Y. As a result, the first pressing surface 58c causes one of the two grooves 17 through which the sewing tape 4b passes to be closer to the upper surface of the worktable 20 than the other groove 17 through which the non-sewing tape 4a passes.

[0168] The second pressing surface 58d is a plane facing the depth direction Y, and is an inclined surface that slopes relative to the vertical direction. The second pressing surface 58d is an inclined surface that gradually slopes towards the front side of the depth direction Y as it faces downwards. The second pressing surface 58d is perpendicular to the first pressing surface 58c. Furthermore, both the second pressing surface 58d and the first pressing surface 58c are parallel to the conveying direction X.

[0169] When the workpiece 1 is supplied to a fixed position on the worktable 20, the sewing device sews the workpiece 1 according to the following steps 1) to 8).

[0170] 1) The control device drives the conveying mechanism 36 to transport the displacement mechanism 34 and the zipper pressing component 32 together from the second location to the first location in a direction opposite to the conveying direction X. As a result, as... Figure 7As shown in (A), the zipper pressing member 32 is positioned separately from the workpiece 1, facing upwards. The straight section pressing member 51 is positioned directly above the straight section 4S of the non-sewn strip 4a in a separated position. Furthermore, the zipper pull pressing member 58 and the branch section pressing member 55 are positioned in a standby position near the front of the pair of zipper teeth 5L in the depth direction Y.

[0171] 2) The control device drives the linear section displacement mechanism 61 (fluid pressure cylinder) to move the piston rod 61b downwards. As a result, the linear section pressing member 51 is displaced from the separated position to the pressing position, and the linear section pressing member 51 presses the workpiece 1 against the worktable 20 from above the non-seam tape 4a. In detail, the linear section pressing member 51 presses the non-seam tape 4a near the front side in the depth direction Y relative to a pair of chain teeth 5L.

[0172] 3) The control device drives the depth position displacement device 65 (fluid pressure cylinder) and the correction displacement device 64 (fluid pressure cylinder) to move each piston rod 65b, 64b toward the depth side in the depth direction Y. As a result, the pull head pressing member 58 is positioned directly above the pull head 6 in its separation position, and the branch pressing member 55 is positioned directly above the sewing tape 4b in its separation position, facing the branch 4T.

[0173] 4) The control device drives the clamping displacement device 63 (fluid pressure cylinder), causing the piston rod 63b to move downwards. The result is that... Figure 7 As shown in (D), the zipper pull pressing member 58 is positioned in the pressing position to press the zipper pull 6. The first pressing surface 58c tilts the zipper pull 6, and the second pressing surface 58d supports the zipper pull 6 from the near-front side in the depth direction Y. Additionally, the branch pressing member 55 is positioned in the pressing position to press the branch section 4T (see reference) near the core cord section 4b1, which has a sewing band 4b. Figure 9 ).

[0174] 5) The control device drives the correction displacement device 64, causing the piston rod 64b to move towards the cylinder body 64c. The result is that... Figure 7 As shown in (E), the branch portion is positioned in the corrective position using the pressing member 55, and the branch portion 4T with sewing tape 4b is displaced towards the near-front side in the depth direction Y, and the branch portion 4T with sewing tape 4b... Figure 7 The extension range of the straight section 4S disposed on the sewing tape 4b is compared to the state of (D). That is, regarding the sewing tape 4b, the branch section 4T and the straight section 4S are closer to a straight line than before the correction (see reference). Figure 10This state is the sewn posture of the workpiece 1. Furthermore, when the branch section is moved from the pressing position to the correcting position by the pressing member 55, the fabric 2 will not be displaced, only the branch section 4T of the sewing tape 4b will be displaced.

[0175] Incidentally, when the pressing member 55 of the branch section moves from the pressing position to the correcting position, even if it moves by sliding on the sewing tape 4b, the pressing member 55 of the branch section will get stuck on the core cord portion 4b1 because the core cord portion 4b1 is thicker, making it difficult to detach from the branch section 4T.

[0176] 6) The control device drives the pressing displacement device 63 (fluid pressure cylinder) to press the piston rod 63b downwards. As a result, the branch 4T of the sewing tape 4b and the fabric 2 are firmly clamped between the branch pressing member 55 and the worktable 20, making it difficult for them to deviate during sewing. Furthermore, the force exerted by the pull head pressing member 58 on the pull head 6 increases. Specifically, the force exerted by the straight section pressing member 51 from above the non-sewing tape 4a to press the workpiece 1 against the worktable 20 in step 2) is equal to the force exerted by the branch pressing member 55 from above the sewing tape 4b to press the workpiece 1 against the worktable 20 in step 6). Moreover, the force exerted by the branch pressing member 55 from above the sewing tape 4b to press the workpiece 1 against the worktable 20 in step 4) is smaller than that in step 6).

[0177] 7) The control device drives the sewing machine 22 and the conveying mechanism 36, conveying the displacement mechanism 34 and the pull head pressing member 58 together from the first location to the second location along the conveying direction X. As a result, the sewing tape 4b and the fabric 2 are sewn together to form the stitch S1.

[0178] 8) The control device stops the sewing machine 22 and drives the straight section displacement mechanism 61 (fluid pressure cylinder 61), causing the piston rod 61b of the fluid pressure cylinder 61 to move upwards again. As a result, the straight section pressing member 51 is displaced from the pressing position to the separating position, and the straight section pressing member 51 separates from the non-sewing tape 4a from it. In addition, the control device drives the branch section displacement mechanism 62 (pressing displacement device 63, depth position displacement device 65, and straightening displacement device 64) to restore the original state. As a result, the pull head pressing member 58 and the branch section pressing member 55 are displaced to their respective standby positions.

[0179] Then, each time the workpiece 1 is supplied to a fixed position on the worktable 20, steps 1) to 8) are repeated.

[0180] In the sewing device of the first embodiment, after the straight section 4S of the non-sewing tape 4a is pressed by the pressing member 50, the branch section pressing member 55 presses the branch section 4T of the sewing tape 4b in the pressing position and then moves to the correction position. As a result, the straight section 4S and the branch section 4T of the sewing tape 4b become closer to a straight line than when they are placed on the fabric 2 and remain as they are. In this state, they can be sewn onto the fabric 2.

[0181] Furthermore, in the sewing device of the first embodiment, since the lower wing plate 12 of the zipper head 6 is pressed by the inclined surface of the first pressing surface 58c, compared with the case where, for example, the pressing surface of the zipper head pressing member is parallel to the upper surface of the worktable 20, the branch portion 4T of the sewing band 4b contacts the upper surface of the fabric 2 near the zipper head 6 in the width direction, making it easy to sew near the zipper head 6 and in this case, the stitch S1 is close to a straight line.

[0182] Furthermore, in the sewing device of the first embodiment, since the zipper pressing member 58 includes a first pressing surface 58c and a second pressing surface 58d, the pressing state of the zipper 6 is stable compared to the case where only the first pressing surface 58c is present. As a result, the sewing state of the workpiece 1 is stable.

[0183] The fabric being sewn is fed towards the sewing machine, passing between the presser foot and the worktable (needle plate) to be sewn. If the tip of the fabric is slightly bent or warped when it reaches the presser foot, it will collide with the presser foot, resulting in a poor stitch. In the case of a differential feed sewing machine, to prevent this from happening, such as... Figures 13-15 As shown, a lifting device 400 for raising the top of the sewing machine presser foot 230 is provided on the worktable 20 near the presser foot 230. Additionally, a sensor 410 is provided above the worktable 20 near the presser foot 230; this sensor 410 is used to detect when the workpiece 1 approaches the lifting device 400 during transport. Figure 14 , Figure 15 The workpiece 1 shown is in a warped state at the top of the sewing tape 4b. The sewing tape 4b is normally horizontal. Figure 14 The dotted line 4b2 indicates that the top of the sewing tape 4b is in the normal position.

[0184] First, describe the general features of the presser foot 230 used in the differential feed sewing machine. For example... Figure 15As shown, the presser foot portion 232, which is the lower part of the sewing machine presser foot 230, includes a front foot portion 233 and a rear foot portion 234, which are separated in the transport direction X; and a spring (not shown) that presses the front foot portion 233 toward the upper surface of the worktable 20. The front foot portion 233 and the rear foot portion 234 are supported by the upper part of the sewing machine presser foot 230, namely the fixing portion 231.

[0185] The rear foot 234 is located on the downstream side of the conveying direction X relative to the front foot 233. The rear foot 234 is always pressed against the bottom line.

[0186] The front leg portion 233 extends along the conveying direction X. The downstream end of the front leg portion 233 in the conveying direction X is supported by a horizontal shaft 236 in a manner that allows it to swing relative to the fixed portion 231. The end of the front leg portion 233 on the side opposite to the conveying direction X (upstream side) is the top of the front leg portion 233. The front leg portion 233 is capable of swinging about the shaft 236. The top 233a of the lower surface of the front leg portion 233 is an inclined surface that gradually rises in the direction opposite to the conveying direction X.

[0187] Figure 13 A lifting device 400 is shown for lifting the top of the presser foot 230 of a sewing machine.

[0188] The lifting device 400 includes: a lifting plate 401, which enables the top of the sewing machine presser foot 230 to be raised or lowered; a fluid pressure cylinder 402, which causes the lifting plate 401 to be raised or lowered; a base 403, which fixes the fluid pressure cylinder 402 to the worktable 20; and a connecting part 404, which connects the piston rod 402b of the fluid pressure cylinder 402 and the lifting plate 401.

[0189] The base 403 is fixed to the worktable (not shown) at a position outside the range through which the sewn workpiece 1 passes. In detail, the base 403 is fixed to the worktable 20 at a position on the upstream side of the conveying direction X, away from the sewing machine presser foot 230, and on the depth side of the depth direction Y relative to the sewing machine presser foot 230.

[0190] The cylinder 402a of the fluid pressure cylinder 402 is fixed to the base 403. The piston rod 402b protrudes upward relative to the cylinder 402a.

[0191] When viewed from the depth direction Y, the lifting plate 401 appears bent. Specifically, the lifting plate 401 includes: a longitudinal plate 401a extending in the vertical direction; and an inclined plate 401b inclined relative to the vertical direction, extending downwards from the lower end of the longitudinal plate 401a in a state toward the conveying direction X. An elongated hole 401h, longer in the vertical direction, is formed in the upper part of the longitudinal plate 401a, penetrating in the conveying direction X.

[0192] When viewed from directly above, both the front foot 233 and the inclined plate 401b are rectangles parallel to the conveying direction X and the depth direction Y, and both have four corners (see reference). Figure 14 The corner of the inclined plate 401b located downstream in the conveying direction X and near the front in the depth direction Y is located directly below the corner of the front foot 233 located upstream in the conveying direction X and in the depth direction Y.

[0193] In order to position the lifting plate 401 in a position suitable for lifting the front foot 233, the connecting part 404 is capable of adjusting the position of the lifting plate 401 in the conveying direction X, the depth direction Y, and the vertical direction. The connecting part 404 includes: a first connecting plate 405 extending along the depth direction Y; and a second connecting plate 406 bent at a right angle when viewed from the depth direction Y.

[0194] At the depth-side end of the first connecting plate 405, an elongated hole 405a, longer in the depth direction Y, is formed in a vertically penetrating manner. The depth-side end of the first connecting plate 405 is connected to the upper end of the piston rod 402b by screws. The connection position between the first connecting plate 405 and the piston rod 402b can be adjusted according to the length of the elongated hole 405a in the depth direction Y. At the near-front end of the first connecting plate 405, an elongated hole 405b, longer in the conveying direction X, is formed in a vertically penetrating manner.

[0195] The second connecting plate 406 includes: a lower fixing plate 406a extending along the conveying direction X; and a rear fixing plate 406b extending downward from the end of the lower fixing plate 406a in the conveying direction X. The lower fixing plate 406a is disposed below the first connecting plate 405. In the portion of the lower fixing plate 406a facing the first connecting plate 405, an internally threaded hole (not shown) communicating with the elongated hole 405b is formed in a vertically penetrating manner. The lower fixing plate 406a is connected to the first connecting plate 405 by screws. The connection position of the first connecting plate 405 and the second connecting plate 406 can be adjusted according to the length of the elongated hole 405b in the conveying direction X.

[0196] The rear fixing plate 406b is positioned upstream of the longitudinal plate 401a in the conveying direction X. In the portion of the rear fixing plate 406b facing the longitudinal plate 401a, an internally threaded hole (not shown) is formed, penetrating in the conveying direction X, communicating with the elongated hole 401h. The rear fixing plate 406b is connected to the longitudinal plate 401a by screws. The connection position between the second connecting plate 406 and the lifting plate 401 can be adjusted according to the vertical length of the elongated hole 401h.

[0197] Figure 15(A) shows the state where the sewn object 1 is located upstream of the sensor 410 in the conveying direction X. The sewn object 1 is conveyed, and when the sensor 410 detects the sewn object 1, as shown in Figure (A), the sewn object 1 is conveyed. Figure 15 As shown in (B), the lifting device 400 drives the fluid pressure cylinder 402, causing the lifting plate 401 to rise, thereby lifting the top of the front leg 233. Thus, even if the top of the sewn item 1 malfunctions, it is unlikely that the top of the sewn item 1 will collide with the top of the front leg 233. Then, when the sewn item 1 reaches below the front leg 233 during the transport process, the lifting device 400 drives the fluid pressure cylinder 402, causing the lifting plate 401 to descend. As a result, the top of the front leg 233 descends due to the force of the spring, as... Figure 15 As shown in (C), the workpiece 1 is sandwiched between the front leg 233 and the worktable 20. As a result, the sewing state of the workpiece 1 is stable. In addition, since the lifting device 400 is provided on the worktable 20, maintenance work becomes easy when the sewing machine is moved to the depth side in the depth direction Y, as the lifting device 400 does not move.

[0198] Figure 16 A variation of the sewing apparatus according to the first embodiment is shown. In this variation, to facilitate sewing near the zipper head 6, the upper surface of the worktable 200 is formed in a stepped shape to replace the zipper head pressing member 58. Specifically, when viewed from the transport direction X, the zipper head 6 is located near the front of the sewing machine presser foot 23 in the depth direction Y. In the upper surface of the worktable 200, the depth side portion 201 in the depth direction Y is formed higher in a stepped shape compared to the near-front portion 202 in the depth direction Y. The near-front portion 202 in the depth direction Y includes the area directly below the zipper head 6 and the area directly below the non-sewing tape 4a. On the other hand, the depth side portion 201 in the depth direction Y includes the area directly below the sewing machine presser foot 23 and the area directly below the sewing tape 4b.

[0199] Fabric 2 is placed on the near-front portion 202 in the depth direction Y, and a non-sewn tape 4a and a zipper pull 6 are placed thereon. Fabric 2 and a sewing tape 4b are sequentially placed on the depth side portion 201 in the depth direction Y. The height position of the depth side portion 201 in the depth direction Y is set such that the sewing tape 4b extends horizontally from the tape groove 17 and is placed on the fabric 2 in this horizontal state. As a result, the sewing tape 4b can be easily sewn to the fabric 2 near the zipper pull 6.

[0200] In the above description, the sewing device of the first embodiment only performed the process of sewing the fabric and the zipper together (sewing process), but in reality, other processes are also performed. In detail, although not shown, the sewing device of the first embodiment performs the following processes 1) to 6) in sequence, and repeats processes 1) to 6) again.

[0201] Process 1) The process of taking a piece of cloth from a bundle of cloth stacks and feeding it to the workbench (pick-up process).

[0202] Processing 2) The process of transporting the fabric before sewing to other locations.

[0203] Processing 3) Processing the fabric (e.g., overlock sewing).

[0204] Processing 4) The process of supplying the processed fabric to the starting position of the sewing process.

[0205] Process 5) The process of feeding the zipper onto the fabric.

[0206] Treatment 6) Suturing.

[0207] The pickup process is performed by the pickup device. For example... Figures 17-20 As shown, the pickup device 70 includes: multiple needles 71 that pierce the fabric 2; a guide plate 72 that guides the needles 71 in a reciprocating manner, allowing the top of the needles 71 to emerge and retract; a needle reciprocating device 75 that is mounted on the guide plate 72 and causes the needles 71 to reciprocate; a support mechanism 76 that suspends the guide plate 72 while supporting it in a rotatable manner about an axis 76a; a lifting device 77 that raises and lowers the support mechanism 76; and a rotating device 80 that drives the guide plate 72 to rotate into a first posture and a second posture.

[0208] The guide plate 72 includes: a pressing surface 72a, which is parallel to the shaft 76a and presses against the fabric 2; a loading surface 72b, which loads the reciprocating device 75 of the loading needle; and a lower surface 72c, which is inclined relative to the pressing surface 72a, facing the side facing the fabric 2 and facing the side opposite to the loading surface 72b. The shaft 76a supports the guide plate 72 near the pressing surface 72a.

[0209] The first posture is one in which the pressing surface 72a is pressed parallel to the fabric 2 and the needle 71 can pierce the fabric 2; this is called the needle-piercing posture. In the needle-piercing posture, a rotation space 78 is formed between the lower surface 72c and the fabric 2. The rotation space 78 is used to rotate the guide plate 72 so that the fabric 2 is separated from the fabric 2 below it.

[0210] The second posture is a posture in which the guide plate 72 is rotated from the first posture to reduce the space 78 while the needle 71 is piercing the fabric 2, thereby separating the fabric 2 from the fabric 2 below it. The second posture is called the peeling posture.

[0211] The above describes the features of the pickup device 70. The following is a detailed description of the pickup device 70. Furthermore, the description of the pickup device 70 uses the terms left-right and front-back directions. These left-right and front-back directions are unrelated to those used in the description of the zipper 3.

[0212] The lifting device 77 is a fluid pressure cylinder 77. The fluid pressure cylinder 77 includes a cylinder body 77c having a cylinder 77a, a piston rod 77b, and a pair of guide rods 77d. The piston rod 77b protrudes downward relative to the cylinder body 77c. A support mechanism 76 is fixed to the lower ends of the piston rod 77b and the guide rods 77d by means of a fixing plate 77e.

[0213] In addition to shaft 76a, support mechanism 76 includes: a top plate 76b, which is fixed below fixed plate 77e; and a pair of side plates 76c, which hang downwards from top plate 76b. The pair of side plates 76c face each other in the left-right direction. Guide plate 72 and needle reciprocating device 75 are housed between the pair of side plates 76c. Shaft 76a is rotatably mounted on the lower part of the pair of side plates 76c while passing through guide plate 72. Shaft 76a is parallel to the left-right direction.

[0214] The guide plate 72 includes: a plate 73 having a lower surface 72c; and a guide member 74 having a loading surface 72b and being mounted on the plate 73. The plate 73 and the guide member 74 each have pressing surfaces 73a and 74a. The pressing surface 73a of the plate 73 and the pressing surface 74a of the guide member 74 form the pressing surface 72a.

[0215] Shaft 76a penetrates plate 73 near clamping surface 73a. Plate 73 has two surfaces in the thickness direction: a lower surface 72c and an upper surface 73b on which the guide plate 72 is mounted. When viewed from the left-right direction, plate 73 extends along a straight line from the portion through which the shaft passes. This direction of extension is defined as the radial direction. The lower surface 72c and upper surface 73b are surfaces parallel to the radial direction centered on shaft 76a. Furthermore, plate 73 has an outward-facing surface 73d facing the radial direction on the side opposite to shaft 76a and clamping surface 73a.

[0216] The guide member 74 is mounted on one side of the clamping surface 72a in the radial direction relative to the upper surface 73b of the plate 73. A plurality of holes 74b are formed on the guide member 74 at intervals in the left-right direction, guiding the needle 71 to reciprocate along a straight line. The holes 74b penetrate in a direction parallel to the upper surface of the plate 73 and orthogonal to the axis 76a. The mounting surface 72b is the upper surface of the guide member 74. Furthermore, the guide member 74 has an entry / exit surface 74c adjacent to the clamping surface 74a, through which the top of the needle 71 enters / exits.

[0217] The needle 71, except for its head, is guided by the hole 74b. The head of the needle 71 protrudes from the guide 74 toward the top of the plate 73. Multiple needles 71 are arranged at intervals in the left-right direction.

[0218] The needle reciprocating device 75 is a fluid pressure cylinder 75. The fluid pressure cylinder 75 includes a cylinder 75a and multiple (two) piston rods 75b. A retainer 75c is fixed to the top of the piston rod 75b. Below the piston rod 75b, another retainer 75d is fixed to the head of multiple needles 71. By fixing the two retainers 75c and 75d, the multiple needles 71 reciprocate as the piston rod 75b reciprocates.

[0219] The rotating device 80 includes: a fluid pressure cylinder 81; a conversion mechanism 82 that converts the reciprocating motion of the piston rod 81b of the fluid pressure cylinder 81 into the rotational motion of the guide plate 72; and a limiting part 85 that ensures the guide plate 72 is in the needle-piercing posture by limiting the rotation angle of the guide plate 72.

[0220] The fluid pressure cylinder 81 includes a cylinder 81a and a piston rod 81b. The piston rod 81b protrudes downward relative to the cylinder 81a.

[0221] like Figure 18 As shown, the conversion mechanism 82 includes: a first support 83 supporting a cylinder 81a; and a second support 84 supporting the top of a piston rod 81b.

[0222] The first support portion 83 includes: a pin 83a that protrudes laterally from the left side plate 76c; and an arm portion 83b, one end of which is connected to the pin 83a and the other end of which is connected to the cylinder 81a. The pin 83a serves as the center for the cylinder 81a to rotate via the arm portion 83b.

[0223] The second support portion 84 includes: a pin 84a, which serves as a fulcrum projecting laterally from the left side of the plate 73; and a connecting member 84b, one end of which is connected to the top of the piston rod 81b, and the other end of which is connected to the pin 84a. The pin 84a projects from the side of the plate 73 near the outer surface 73d of the axis 76a in a radial direction away from the axis. The connecting member 84b extends from the top of the piston rod 81b.

[0224] Pin 84a becomes the center when piston rod 81b rotates via connecting member 84b.

[0225] The orientation of the guide plate 72 changes depending on the amount by which the piston rod 81b protrudes relative to the cylinder 81a. When the piston rod 81b protrudes the most into the cylinder 81a, the guide plate 72 is in a needle-piercing orientation. On the other hand, when the piston rod 81b protrudes the most from the cylinder 81a, the guide plate 72 is in a peeling orientation.

[0226] like Figure 17 As shown, the limiting part 85 includes: a contact member 85a, which is fixed to the outer surface 73d of the guide plate 72; and a blocking member 85b, which is fixed to another side plate 76c. When the guide plate 72 changes from a peeling posture to a needle-punching posture, the blocking member 85b contacts the contact member 85a, limiting the rotation of the guide plate 72.

[0227] The pickup device 70 operates according to the following steps 1) to 6).

[0228] 1) The pickup device 70 is moved from the standby position to the separation position above and away from the fabric bundle 2G. At this time, the guide plate 72 is in a needle-punching posture.

[0229] 2) The lifting device 77 lowers the support mechanism 76, pressing the pressing surface 72a of the guide plate 72 against the fabric bundle 2G. Through this pressing, the fibers of the overlapping fabric 2 intertwine and generate an adsorption force. The adsorption force increases with the area of ​​the pressing surface 72a and decreases with the area decreasing. The area of ​​the pressing surface 72a is smaller than, for example, the block shape that fills the space 78 of the guide plate. As a result, when the pressing surface 72a is pressed against the fabric bundle 2G, the uppermost fabric 2 and the second fabric 2 from the top become easily separable.

[0230] 3) Drive the reciprocating device 75 of the needle so that the top of the needle 71 protrudes from the protrusion surface 74c and pierces the uppermost fabric 2.

[0231] 4) The fluid pressure cylinder 81 of the driving rotating device 80 changes the guide plate 72 from a piercing posture to a peeling posture by reducing the size of the space 78. As a result, as... Figure 20As shown, the portion of the uppermost fabric 2 pierced by the needle 71 is rolled up and separated from the second fabric 2 from above. Furthermore, since the lower surface 72c of the guide plate 72 is tilted slightly upwards relative to the fabric 2, the lower surface 72c does not generate a force that presses against the fabric 2.

[0232] 5) Drive the lifting device 77 to raise the support mechanism 76, so that the uppermost fabric 2 is separated from the fabric bundle 2G below it.

[0233] 6) The pickup device 70 is transported to a predetermined position on the worktable 20, and the fluid pressure cylinder 81 of the rotating device 80 is driven to change the guide plate 72 from the peeling posture to the needle-punching posture. In addition, the needle reciprocating device 75 is driven to return the top of the needle 71 to the hole 74b of the guide member 74, supplying the uppermost piece of fabric 2 to a predetermined position on the worktable 20.

[0234] 7) The pickup device 70 is transported to the standby position.

[0235] Then, repeat steps 1) to 7).

[0236] This utility model is not limited to the above-described embodiments, and can be appropriately modified within the scope of its essence.

[0237] For example, the branch displacement mechanism 62 is configured to use three devices (a pressing displacement device 63, a depth position displacement device 65, and a straightening displacement device 64) to displace the branch pressing member 55 in the vertical direction and the depth direction Y. However, the present invention is not limited to this and may also be a structure using two devices. For example, one device is used to displace the branch pressing member 55 to the pressing position and the straightening position, and another device is used to displace the branch pressing member 55 to the pressing position and the separation position (standby position).

[0238] Furthermore, the zipper pull displacement mechanism 69 is configured to use two devices (a pressing displacement device 63 and a depth position displacement device 65) to displace the zipper pull pressing member 58 in the vertical direction and the depth direction Y. However, this invention is not limited to this, and it may also be a structure using only one device. In this case, in order to displace the zipper pull pressing member 58 to the pressing position and the disengaged position (standby position), a single device can perform a reciprocating motion, for example, in an arc shape.

Claims

1. A sewing device, characterized in that: The sewing device takes the sewn object (1) obtained by placing the zipper (3) on the fabric (2) as the sewing object. The pair of straps (4a, 4b) of the zipper (3) are divided into a parallel straight part (4S) and a pair of branch parts (4T) that branch into two forks by the zipper head (6). The sewing apparatus includes: a worktable (20); a sewing machine (22) for sewing the fabric (2) with the sewing tape (4b) of one of the pair of tapes (4b); and a conveying device (30) for pressing the workpiece (1) against the worktable (20) while conveying the workpiece (1) toward the sewing machine (22). The conveying device (30) includes: a zipper pressing component (32) that presses the workpiece (1) on the worktable (20) from above the zipper (3); a displacement mechanism (34) that displaces the zipper pressing component (32) to align the workpiece (1) in a sewing position; and a conveying mechanism (36) that conveys the zipper pressing component (32) and the displacement mechanism (34) toward the sewing machine (22). The zipper pressing component (32) includes a belt pressing component (50) for pressing the pair of belts (4a, 4b). The belt pressing member (50) includes: a straight section pressing member (51) that presses the straight section (4S) of the unstitched belt (4a) of the other belt (4a) in a pair of belts; and a branch section pressing member (55) that presses the branch section (4T) of the stitched belt (4b). The displacement mechanism (34) includes: a straight section displacement mechanism (61) for displacing the straight section pressing member (51) between a separation position and a pressing position relative to the straight section (4S) of the unstitched tape (4a); and a branch section displacement mechanism (62) for displacing the branch section pressing member (55) between a separation position, a pressing position, and a corrective position relative to the branch section (4T) of the sewn tape (4b). In the corrected position, compared to the state of being pressed in the pressed position, the branch (4T) of the sewing tape (4b) is corrected to be closer to a straight line relative to the straight portion (4S) of the sewing tape (4b).

2. The sewing device according to claim 1, characterized in that: In addition to the pressing component (50), the zipper pressing component (32) also has a zipper head pressing component (58) for pressing the zipper head (6). In addition to the belt displacement mechanism (60) which includes the straight section displacement mechanism (61) and the branch section displacement mechanism (62), the displacement mechanism also has a pull head displacement mechanism (69) for displacing the pull head pressing member (58) between a separated position and a pressed position relative to the pull head (6). When viewed from the conveying direction (X), the zipper head (6) has grooves (17) on two sides in the width direction for a pair of belts (4a, 4b) to pass through, and the zipper head pressing member (58) has a first pressing surface (58c) for pressing the upper surface of the zipper head (6). The first pressing surface (58c) is an inclined surface that is tilted relative to the upper surface of the worktable (20), and one of the two slots (17) through which the sewing tape (4b) passes is closer to the upper surface of the worktable (20) than the other of the two slots (17) through which the non-sewing tape (4a) passes.

3. The sewing device according to claim 2, characterized in that: In addition to the first pressing surface (58c), the zipper pressing component (58) also has a second pressing surface (58d), which presses the zipper (6) from the side where the branch (4T) of the unstitched tape (4a) is located in the width direction.

4. The sewing device according to claim 2 or 3, characterized in that: The branch displacement mechanism (62) includes: a pressing displacement device (63), which also serves as the pull head displacement mechanism (69), and is used to displace the branch pressing member (55) and the pull head pressing member (58) together between their respective separation positions and their respective pressing positions; and a straightening displacement device (64), which is used to displace the branch pressing member (55) between its own pressing position and the straightening position.

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