Sewing device

Abstract

The purpose of the present invention is to provide a sewing device capable of stably sewing the vicinity of a slider of a slide fastener when sewing an object to be sewn. The sewing device takes an article obtained by loading a zipper (3) on cloth (2) as a sewn article (1), and comprises a workbench (20), a sewing machine (22) and a conveying device (30). The conveying device is provided with: a slide fastener pressing member (32) for pressing the slide fastener; a displacement mechanism (34) for displacing the zipper pressing member to two positions, namely a position away from the object to be sewn on the workbench and a pressing position for pressing the object to be sewn on the workbench; and a conveying mechanism (36) for conveying the zipper pressing member and the displacement mechanism toward the sewing machine in order to sew the one tape (4b) of the zipper and the cloth by the sewing machine. The slide fastener pressing member includes a tape pressing member (50) that presses the other tape (4a), and a slider pressing member (60) that presses the slider (6).

Description

Technical Field

[0001] The present invention relates to a sewing device. The object to be sewn by the sewing device, namely, the sewing object is an article obtained by placing a zipper on a cloth. The sewing device comprises: a workbench, a sewing machine, and a conveying device for conveying the sewing object toward the sewing machine while pressing the sewing object against the workbench. Background Art

[0002] As an example of above-mentioned sewing device, known have a band in a pair of bands of slide fastener and the device (patent documentation 1) of placket fabric sewing up as cloth.In order to sew up a band and cloth, on one side, press another band from top, on one side, sewn thing is conveyed towards sewing machine.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 6423568 Summary of the invention

[0006] However, the slider of the zipper is thicker than the teeth and tape of the zipper. As a result, when the fabric and the zipper are placed on the workbench in sequence, the closer the two tapes are to the slider, the more they float relative to the fabric. In addition, in order to achieve a good sewing finish, it is preferred to press the tape that is not to be sewn as close to the needle of the sewing machine as possible so that the tape to be sewn does not float relative to the fabric as much as possible.

[0007] The closer the position of the tape to be pressed and not sewn is to the slider in the width direction of the zipper, the greater the slider's inclination relative to the horizontal direction due to its thickness, and the more the tape to be sewn floats near the slider. As a result, sewing near the slider becomes unstable, and there is a possibility that the stitching may deviate from the tape near the slider depending on the situation. In addition, Fig.10 The sewn object 90 is shown. The sewn object 90 is sewn in a state where the slider 91 is inclined relative to the horizontal direction. As a result, the fabric 92 and the zipper 93 are sewn together, and one of the two stitches 94 deviates from the tape 95 near the slider 91.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sewing device capable of making sewing as stable as possible near a slider.

[0009] The sewing device of the present invention uses an article obtained by placing a zipper on a cloth as a sewn object, and includes: a workbench, a sewing machine, and a conveying device that conveys the sewn object toward the sewing machine while pressing the sewn object against the workbench. The conveying device includes: a zipper presser that presses the zipper; a displacement mechanism that can displace the zipper presser to two positions: a position away from the sewn object on the workbench and a pressing position where the sewn object is pressed against the workbench; and a conveying mechanism that conveys the zipper presser and the displacement mechanism toward the sewing machine in order to sew one of a pair of zipper tapes with the cloth using the sewing machine. The zipper presser includes: a tape presser that presses the other tape of the pair of tapes; and a slider presser that presses the slider of the zipper.

[0010] The belt pressing piece can press any range in the length direction of the other belt. However, in order to stabilize the sewing near the slider, the following method is preferred. That is, the belt pressing piece includes a main belt pressing part and a secondary belt pressing part that press different ranges in the length direction of the other belt. The main belt pressing part is a part that presses the other belt in a range away from a pair of chain teeth of the zipper in the width direction of the zipper. The secondary belt pressing part is a part that presses the other belt in a range away from the slider in the width direction.

[0011] The displacement mechanism may be single or multiple. The belt pressing member and the slider pressing member may or may not be integrated. However, in order to be able to set the pressure of the belt pressing member pressing the belt and the pressure of the slider pressing member pressing the slider separately, the following method is preferred. That is, the displacement mechanism includes: a first displacement mechanism, which displaces the belt pressing member to two positions: a pressing position for pressing the sewn object against the workbench from above the other belt and a distance position away from the other belt; and a second displacement mechanism, which displaces the slider pressing member to two positions: a pressing position for pressing the sewn object against the workbench from above the slider and a distance position away from the slider. The slider pressing member can be displaced independently of the belt pressing member by the second displacement mechanism.

[0012] An example of the second displacement mechanism is as follows. That is, the second displacement mechanism is a rotary actuator.

[0013] The sewn object may or may not be in a state where the lower wing of the slider is located below the upper wing of the slider. When the lower wing is located above the upper wing, the slider becomes unstable on the fabric compared to the case where the lower wing is located below the upper wing. In such a case, the slider pressing piece is preferably as described below. That is, the sewn object is in a state where the lower wing is located above the upper wing. And, when the zipper pressing piece is in the pressing position, the slider pressing piece overlaps the entire surface of the lower wing when viewed from above.

[0014] Effects of the Invention

[0015] The sewing device of the present invention comprises a belt pressing member and a slider pressing member, so when a belt is sewn to a cloth, another belt and the slider are pressed. As a result, the pressing state of the sewn object near the slider is stable, and the sewing state is stable.

[0016] In the sewing device of the present invention, when the belt pressing member includes a main belt pressing portion and a secondary belt pressing portion, the belt is pressed in a range away from a pair of chain element rows and a slider in the width direction. As a result, the pressing state of the sewn object near the slider is stable, and the sewing state is stable.

[0017] In the sewing device of the present invention, when the displacement mechanism includes the first displacement mechanism and the second displacement mechanism, the belt pressing member is displaced by the first displacement mechanism to press the belt, and the slider pressing member is displaced by the second displacement mechanism to press the slider. As a result, the pressing state of the sewn object near the slider is stable, and the sewing state is stable.

[0018] In the sewing device of the present invention, the zipper pressing member is located at the pressing position, and when the slider pressing member overlaps the entire surface of the lower wing plate in a top view, the slider is in a stable pressed state. As a result, the pressed state of the sewn object near the slider is stable, and the sewing state is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a perspective view showing the main part of the sewing device according to the first embodiment of the present invention.

[0020] Figure 2 It is an explanatory diagram of a sewing machine showing the sewing device according to the first embodiment.

[0021] Figure 3 (A) to (D) are a top view, a bottom view, a front view, and a left side view showing an example of a slider of a slide fastener.

[0022] Figure 4 It is a perspective view showing the main part of the sewing device according to the first embodiment.

[0023] Figure 5 This is an explanatory diagram of the main part of the sewing device according to the first embodiment as viewed from the direction opposite to the conveying direction.

[0024] Figure 6 It means by Figure 5 1 is an explanatory diagram of the main parts of a left side view of the sewing device according to the first embodiment shown.

[0025] Figure 7 It is a plan view showing a state where a workpiece is pressed by the sewing device according to the first embodiment.

[0026] Figure 8 It is a plan view showing a state where a workpiece is sewn by the sewing device according to the first embodiment.

[0027] Fig. 9 It is a plan view showing a workpiece sewn by the sewing device according to the first embodiment.

[0028] Fig.10 It is a top view showing a workpiece sewn by a conventional sewing device.

[0029] Description of Reference Numerals

[0030] 1. Fabric 2. Cloth

[0031] 3 zippers 4a, 4b belts

[0032] 4S straight part 4T forked part

[0033] 5 tooth 5L tooth row

[0034] 6 Slider 6h Through hole

[0035] 7 1st stopper 8 2nd stopper

[0036] 11 Upper wing plate 12 Lower wing plate

[0037] 13 Connecting column 14 Flange

[0038] 15 pull tab mounting portion 16 pull tab

[0039] 16a Shaft portion 16b Grip portion

[0040] 16c: connection portion 16h: through hole

[0041] 20 Workbench 22 Sewing machine

[0042] 22a Sewing machine body 23 Sewing machine presser foot

[0043] 23a: fixing part 23b: presser foot part

[0044] 23h Needle hole 24 Needle

[0045] 25 Column 26 Sewing machine head

[0046] 26a Connecting rod 26b Needle rod

[0047] 26c Fixing member 30 Conveying device

[0048] 32 zipper pressing member 34 displacement mechanism

[0049] 36 conveying mechanism 41 moving parts

[0050] 42 Reciprocating mechanism 43 Electric motor

[0051] 44 conversion mechanism unit 46 plate

[0052] 50 belt pressing member 51 main belt pressing portion

[0053] 52 fixing piece 53 pressing piece

[0054] 54 bending portion 55 auxiliary belt pressing portion

[0055] 60 Slider pressing piece 61 Fixing piece

[0056] 61h Long hole 62 Pressing piece

[0057] 62a Top 62b Connecting part

[0058] 63 bending portion 70 first displacement mechanism (fluid pressure cylinder)

[0059] 71 Cylinder 72 Piston rod

[0060] 73 Cylinder 74 Guide rod

[0061] 75 fixed plate 80 second displacement mechanism (rotation actuator)

[0062] 81 housing 82 shaft

[0063] 83 Angle adjustment unit 84 Rotor

[0064] 85 base 86 contact piece

[0065] 87 Block 90 Sewn object

[0066] 91 Slider 92 Fabric

[0067] 93 Zipper 94 Stitch

[0068] 95 with B bolt

[0069] F Frame G Clearance

[0070] S1 stitch X conveying direction

[0071] Y depth direction DETAILED DESCRIPTION

[0072] Fig. 9 The sewn object 1 sewn by the sewing device of the first embodiment of the present invention is shown. The sewn object 1 is in a state where the cloth 2 and the zipper 3 are sewn together. An example of the cloth 2 is a placket.

[0073] Hereinafter, when describing the zipper 3, the terms such as length direction, width direction, up-down direction, left-right direction, front-back direction and thickness direction are used. The above directions are based on the state where the zipper 3 is placed on a horizontal plane. The "length direction" refers to the direction in which the zipper 3 is opened and closed. The "length direction" is also called the front-back direction. The "front direction" refers to the direction in which the zipper 3 is closed. Fig. 9 The "rear direction" refers to the direction in which the zipper 3 is opened. Fig. 9 The “width direction” refers to the direction perpendicular to the length direction when the zipper 3 is viewed from above. The “width direction” is also called the left-right direction. The “up-down direction” refers to the direction perpendicular to both the length direction and the width direction.

[0074] The dimension of the zipper 3 in the length direction is longer than that in the width direction. As is well known, the zipper 3 includes a pair of belts 4a, 4b, a plurality of chain elements 5 and a slider 6. The pair of belts 4a, 4b face each other in the width direction. The belts 4a, 4b are soft belts extending along a straight line. The plurality of chain elements 5 are fixed to the opposite side edges of the pair of belts 4a, 4b at intervals in the length direction. The chain element row 5L is composed of all the chain elements 5 fixed to each belt 4a, 4b. Therefore, the zipper 3 has a pair of chain element rows 5L in the central portion in the width direction. The slider 6 opens and closes the pair of chain element rows 5L.

[0075] Furthermore, the slide fastener 3 includes a first stopper 7 and a second stopper 8 that define both ends of the moving range of the slider 6 by colliding with the slider 6 .

[0076] The first stopper 7 determines the boundary position of the pair of element rows 5L on the locking side within the moving range of the slider 6. In the example shown in the figure, the first stopper 7 is fixed to the opposing side edge portions of one tape 4a.

[0077] The second stopper 8 determines the boundary position of the open side of the pair of element rows 5L within the moving range of the slider 6. In the example shown in the figure, the second stopper 8 is fixed so as to straddle the opposite side edges of the pair of belts 4a and 4b. One side portion in the width direction of the second stopper 8 is fixed to one belt 4a, and the other side portion in the width direction of the second stopper 8 is fixed to the other belt 4b.

[0078] The zipper 3 is in a state where the pair of element rows 5L are closed, in other words, the slider 6 is in contact with the first stopper 7. In this state, all the elements 5 between the slider 6 and the second stopper 8 are in a state where the adjacent elements 5 are meshed with each other. In addition, the zipper 3 includes a straight portion 4S in which a pair of tapes 4a and 4b extend straightly with the slider 6 as a boundary, and a pair of bifurcated portions 4T bifurcated into two portions.

[0079] like Figure 3As shown, the slider 6 includes an upper wing plate 11, a lower wing plate 12, a connecting column 13, a flange 14, a pull-tab mounting portion 15, and a pull-tab 16. The state in which the pull-tab 16 is arranged above the upper wing plate 11 is the standard state of the slider 6. When the slider 6 is described separately, the slider 6 is in the standard state when the state of the slider 6 is not mentioned.

[0080] The upper wing plate 11 and the lower wing plate 12 face each other in the vertical direction with a gap therebetween. The connecting column 13 extends in the vertical direction and connects the front part of the upper wing plate 11 and the front part of the lower wing plate 12 in the middle part of the left-right direction. The flange 14 protrudes from the left and right side edges of the upper wing plate 11 and the left and right side edges of the lower wing plate 12 in a direction that narrows the upper and lower gaps between the upper wing plate 11 and the lower wing plate 12. A through hole (gap) 6h for the pull tab 16 to pass through is formed in a way that penetrates in the left-right direction between the pull tab mounting portion 15 and the upper wing plate 11 in the vertical direction. A pair of chain element rows 5L pass through between the upper wing plate 11 and the lower wing plate 12 in a penetrating state. A total of four flanges 14 in the upper and lower and left and right directions hold the slider 6 in a way that it will not be separated from the pair of chain element rows 5L in the width direction. A pair of belts 4a, 4b pass through the flanges 14 facing each other in the vertical direction in a state of penetrating in the front-back direction.

[0081] The pull tab 16 is formed with a through hole 16h for the pull tab mounting portion 15 to pass through. When viewed from the width direction, the pull tab 16 is arranged above the upper wing plate 11 and is supported on the pull tab mounting portion 15 in a rotatable manner. When the pull tab 16 is not operated, the pull tab 16 is placed on the upper surface of the upper wing plate 11 in a state extending in the front-to-back direction. The pull tab 16 includes: a shaft portion 16a as a center of rotation, a grip portion 16b gripped during operation, and a pair of connecting portions 16c connecting the shaft portion 16a and the grip portion 16b separated in the front-to-back direction. The shaft portion 16a, the grip portion 16b, and the pair of connecting portions 16c are arranged in a state of surrounding the outside of the through hole 16h. When the pull tab 16 is not operated, the shaft portion 16a and the grip portion 16b are arranged in a state of being separated in the front-to-back direction, and the pair of connecting portions 16c are arranged on the left and right sides relative to the pull tab mounting portion 15, and the left and right ends of the shaft portion 16a and the left and right ends of the grip portion 16b are connected. In addition, the grip portion 16b is arranged on the rear side relative to the shaft portion 16a.

[0082] In the case of the zipper 3, since the pair of chain element rows 5L penetrates the slider 6, the slider 6 is in a state of protruding in the vertical direction relative to the pair of chain element rows 5L. As a result, when the zipper 3 is placed on a horizontal surface, the following state is achieved: in terms of the range in the longitudinal direction of the zipper 3, the relative side edges of the pair of belts 4a and 4b float relative to the horizontal surface compared to the range of the closed pair of chain element rows 5L within the range of the slider 6. This instability has nothing to do with whether the slider 6 is in a standard state or a flipped state. The "flipped state" refers to a state in which the slider 6 is flipped upside down relative to the standard state.

[0083] In the slider 6, in the vertical direction, the upper surface of the pull-tab mounting portion 15 is arranged above the upper surface of the pull-tab 16, and the upper surface of the pull-tab 16 is arranged above the upper surface of the upper wing plate 11. In addition, in the slider 6, in the left-right direction, the upper surface of the pull-tab mounting portion 15 is arranged in the middle part of the slider 6 in the left-right direction, and the pull-tab 16 protrudes to the left and right relative to the pull-tab mounting portion 15. In addition, 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 flipped state is not as stable as the standard state, and the slider 6 is easily tilted relative to the horizontal direction.

[0084] The workpiece 1 overlaps the zipper 3 on the fabric 2. In the workpiece 1, the zipper 3 is in a closed state, and the slider 6 is in an inverted state. As a result, the workpiece 1 is in a state where the pull tab 16 and the pull tab mounting portion 15 face the fabric 2, and the lower wing plate 12 is located above the upper wing plate 11. In addition, in the workpiece 1, the fabric 2 protrudes to both sides of the zipper 3 in the width direction. When sewing the workpiece 1, a belt 4b is sewn to the fabric 2, and a pair of stitches S1 are formed on the workpiece 1. The pair of stitches S1 is formed parallel to the pair of chain element rows 5L.

[0085] like Figure 1 As shown, the sewing device of the first embodiment of the present invention includes a workbench 20, a sewing machine 22 and a conveying device 30. The conveying device 30 presses the sewn object 1 against the workbench 20 while conveying the sewn object 1 straightly toward the sewing machine 22. That is, the direction of conveying the sewn object 1 (hereinafter referred to as the "conveying direction" X) is a straight line. In addition, the upper surface of the workbench 20 is a horizontal plane. When looking down at the workbench 20, the direction orthogonal to the conveying direction X is called the "depth direction" Y. The sewing machine 22 and the conveying device 30 are separated in 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 conveying device 30 is arranged on the near front side relative to the sewing machine 22.

[0086] like Figure 1 , Figure 2As shown, the sewing machine 22 includes a sewing machine body 22 a for sewing the workpiece 1 , and a sewing machine presser foot 23 for pressing the workpiece 1 .

[0087] The sewing machine body 22a is a well-known device, which entangles the upper thread passing through the needle 24 and the lower thread supplied to the bottom of the needle hole of the worktable 20 to form a stitch S1 on the sewn object 1. In addition, the upper thread, the lower thread, and the needle hole are not shown in the figure. In addition, in the present embodiment, the sewing machine body 22a is a chain stitch sewing machine, and by cooperating with the conveying device 30, a dotted and straight stitch S1 is formed on the sewn object 1.

[0088] like Figure 2 As shown, the sewing machine body 22a includes: a base portion (not shown) disposed below the workbench 20; a column portion 25 standing from the base portion; and a sewing machine head 26 extending from the upper portion of the column portion 25. The base portion and the sewing machine head 26 face each other in the vertical direction and extend in the depth direction Y. The column portion 25 extends in the vertical direction in a state of being sandwiched by the depth side portion of the base portion and the depth side portion of the sewing machine head 26.

[0089] A mechanism for winding the lower thread and the upper thread is built inside the base portion. A mechanism for interlocking the internal mechanism of the sewing machine head 26 and the internal mechanism of the base portion is built inside the column portion 25, for example.

[0090] The sewing machine head 26 includes: a sewing machine head housing (with reference numerals omitted) forming its outer contour, and an internal mechanism housed in the sewing machine head housing. In addition, the internal mechanism is a pointer rod driving mechanism, a thread take-up lever driving mechanism, a sewing machine presser foot driving mechanism, etc. The connecting rod 26a of the sewing machine presser foot driving mechanism protrudes downward from the lower surface of the top of the sewing machine head housing. The sewing machine presser foot 23 is fixed to the lower end of the connecting rod 26a.

[0091] like Figure 1 , Figure 2 As shown in the figure, the sewing machine presser foot 23 includes: a fixed portion 23a, which is fixed to the connecting rod 26a and extends downward; and a presser foot portion 23b, which extends from the lower end of the fixed portion 23a in the direction opposite to the conveying direction X. A needle hole 23h is formed in the presser foot portion 23b and penetrates in the up-down direction. In the example shown in the figure, two needle holes 23h are formed in the depth direction Y in a spaced manner.

[0092] In addition, the needle bar 26b of the needle bar driving mechanism protrudes downward from the lower surface of the top of the sewing machine head housing. The needle 24 is mounted on the lower end of the needle bar 26b via the fixing member 26c in a state of extending downward. In the example shown in the figure, two needles 24 are mounted on the fixing member 26c in a manner of being spaced apart in the depth direction Y corresponding to the two needle holes 23h. The needle 24 is displaced in the up and down direction in a manner of passing through the needle hole 23h by the needle bar driving mechanism.

[0093] like Figure 4 to Figure 7 As shown, the conveying device 30 includes: a zipper presser 32, which presses the zipper 3; a displacement mechanism 34, which displaces the zipper presser 32; a conveying mechanism 36, which conveys the zipper presser 32 and the displacement mechanism 34 toward the sewing machine 22; and a control device (not shown), which controls the displacement mechanism 34 and the conveying mechanism 36.

[0094] While the zipper pressing member 32 presses the sewn article 1 against the work table 20, the conveying mechanism 36 conveys the zipper pressing member 32 and the displacement mechanism 34 in the conveying direction X, and the one of the pair of belts 4a and 4b, 4b, is sewn to the fabric 2 by the sewing machine 22. In addition, the belt 4a pressed by the conveying device 30 of the pair of belts 4a and 4b is referred to as the pressing side belt 4a, and the belt 4b to be sewn is referred to as the sewing side belt 4b.

[0095] The conveying mechanism 36 causes the zipper presser 32 and the displacement mechanism 34 to perform linear reciprocating motion when viewed from above. The forward direction is the conveying direction X. In addition, the conveying mechanism 36 causes the zipper presser 32 and the displacement mechanism 34 to perform linear reciprocating motion between a location (first location) away from the sewing machine 22 in a direction opposite to the conveying direction X and a location (second location) away from the sewing machine 22 in the conveying direction X. The conveying mechanism 36 includes: a moving member 41 that fixes the displacement mechanism 34; and a reciprocating mechanism portion 42 that causes the moving member 41 to reciprocate in a direction opposite to the conveying direction X and in the conveying direction X. In the present embodiment, the reciprocating mechanism portion 42 converts the rotational motion into linear reciprocating motion. Specifically, the reciprocating mechanism portion 42 includes: a motor 43 that serves as a driving source for the rotational motion; and a conversion mechanism portion 44 that extends above the workbench 20 along the conveying direction X and converts the rotational motion of the motor 43 into the reciprocating motion of the moving member 41. The motor 43 of the reciprocating mechanism 42 is integrated with the conversion mechanism 44. For example, a ball screw is used as a part of the conversion mechanism 44. In addition, the sewing device has a frame F. The reciprocating mechanism 42 is fixed to the frame F.

[0096] like Figure 1 , Figures 4 to 8As shown, the zipper pressing member 32 includes: a tape pressing member 50 that presses the pressing side tape 4 a ; and a slider pressing member 60 that presses the slider 6 .

[0097] The belt pressing member 50 is a bent plate and includes a main belt pressing portion 51 and a secondary belt pressing portion 55 for pressing different ranges in the longitudinal direction of the side belt 4a. The main belt pressing portion 51 and the secondary belt pressing portion 55 are integrated.

[0098] The main belt pressing portion 51 is a component that presses the pressing side belt 4a in a range away from a pair of chain element rows 5L in the width direction (depth direction Y). The main belt pressing portion 51 is L-shaped when viewed from the conveying direction X. The main belt pressing portion 51 includes: a fixing plate 52, which is used to be fixed to the displacement mechanism 34; a pressing plate 53, which is used to press the pressing side belt 4a; and a bending portion 54, which connects the fixing plate 52 and the pressing plate 53. The fixing plate 52 and the pressing plate 53 are flat plates and are rectangular. When the belt pressing member 50 presses the pressing side belt 4a, the bending portion 54 extends along a straight line in the conveying direction X. When the belt pressing member 50 presses the pressing side belt 4a, the fixing plate 52 is horizontal and is located near the front side relative to the bending portion 54.

[0099] The sub-belt pressing portion 55 is a component that presses the pressing side belt 4a in a range away from the slider 6 in the width direction (depth direction Y). The sub-belt pressing portion 55 and the pressing sheet 53 are connected in the conveying direction X. In addition, when the belt pressing member 50 presses the pressing side belt 4a, the sub-belt pressing portion 55 and the pressing sheet 53 are both vertical, and the lower end of the sub-belt pressing portion 55 and the lower end of the pressing sheet 53 are at the same height, and the lower surface of the sub-belt pressing portion 55 and the lower surface of the pressing sheet 53 are serrated. In addition, when the belt pressing member 50 presses the pressing side belt 4a, the upper surface of the sub-belt pressing portion 55 is lower than the upper surface of the fixing sheet 52.

[0100] When the sewing device is being sewn in a top view, the belt pressing member 50 and the slider pressing member 60 are arranged near the front side relative to the sewing machine presser foot 23 in the depth direction Y. The position where the slider pressing member 60 presses the slider 6 is located at the depth side in the depth direction Y compared to the position where the belt pressing member 50 presses the pressing side belt 4a. When viewed from above, a gap G in the depth direction Y is formed between the trajectory of the slider pressing member 60 during sewing and the sewing machine presser foot 23 (see FIG. 2 ). Figure 8 As a result, the slider pressing member 60 is conveyed in a manner that does not collide with the sewing machine presser foot 23 during sewing.

[0101] like Figure 5As shown, the displacement mechanism 34 displaces the zipper pressing member 32 to two positions: a position away from the sewn article 1 on the workbench 20 and a pressing position where the sewn article 1 is pressed against the workbench 20. The displacement mechanism 34 includes: a first displacement mechanism 70 that displaces the belt pressing member 50; and a second displacement mechanism 80 that displaces the slider pressing member 60.

[0102] The first displacement mechanism 70 causes the belt pressing member 50 to be displaced to two positions: a pressing position where the sewing material 1 is pressed against the work table 20 from above the pressing side belt 4a and a distance position away from the pressing side belt 4a. The first displacement mechanism 70 is an actuator capable of reciprocating motion. Figure 4 to Figure 7 As shown, the first displacement mechanism 70 is an actuator that performs linear reciprocating motion in the up and down directions. Specifically, the first displacement mechanism 70 is a fluid pressure cylinder 70. The fluid pressure cylinder 70 is a pneumatic cylinder or a hydraulic cylinder. As is well known, the fluid pressure cylinder 70 includes: a cylinder 71; and a piston rod 72, which protrudes from the inside to the outside relative to the cylinder 71 and can reciprocate along a straight line. The posture of the fluid pressure cylinder 70 is a posture in which the piston rod 72 protrudes downward relative to the cylinder 71. The cylinder 71 is fixed to the moving part 41 of the conveying mechanism 36. The lower end of the piston rod 72 fixes the fixed plate 52 with the pressing member 50.

[0103] In the example shown in the figure, the cylinder 71 constitutes a part of the cylinder body 73. The cylinder body 73 has guide holes (not shown) on the side opposite to the conveying direction and on the conveying direction X side relative to the cylinder 71. The guide rod 74 is guided by the guide hole in a manner that allows it to move up and down. The guide rod 74 protrudes downward from the cylinder body 73. The fixing piece 52 of the belt pressing member 50 is fixed to the lower ends of a pair of guide rods 74 and the piston rod 72 via a fixing plate 75. The cylinder body 73 is fixed to the moving member 41 via a plate 46. As described above, the first displacement mechanism 70 connects the conveying mechanism 36 and the belt pressing member 50.

[0104] The second displacement mechanism 80 causes the slider pressing member 60 to be displaced to two positions: a pressing position where the sewn article 1 is pressed against the workbench 20 from above the slider 6, and a distance position away from the slider 6. In addition, the second displacement mechanism 80 is an actuator that performs a rotational reciprocating motion. In more detail, the second displacement mechanism 80 is a rotary actuator 80. The rotary actuator 80 includes: a housing 81; and a shaft 82 that protrudes from the inside of the housing 81 to the outside. A driving portion that allows the drive shaft 82 to perform a rotational reciprocating motion is accommodated inside the housing 81. The top of the shaft 82 protrudes from the housing 81 in a direction opposite to the conveying direction X.

[0105] The rotary actuator 80 has an angle adjustment part 83 capable of adjusting the rotation angle of the shaft 82. The angle adjustment part 83 is well known and includes: a rotor 84 fixed to the housing 81 side in the top of the shaft 82; a base 85 fixed to the outer surface of the housing 81; and a pair of contact members 86 fixed to the base 85 and colliding with the rotor 84. The base 85 is arranged on the outer side of the radial direction relative to the rotor 84 in the radial direction centered on the shaft 82. The contact member 86 includes a bolt and a nut. The bolt is screwed into the base 85. One end of the bolt is a portion that protrudes from the base 85 toward the rotor 84 side and collides with the rotor 84. The other end of the bolt protrudes from the base 85 toward the side opposite to the rotor 84. The nut is screwed into the other end of the bolt, and the protrusion amount of one end of the bolt is determined by pressing the nut against the base 85. When the shaft 82 rotates in one direction, the rotor 84 collides with the bolt of one contact member 86. When the shaft 82 rotates in the direction opposite to the one direction, the rotor 84 collides with the bolt of the other abutment member 86. As a result, the rotation angle of the shaft 82 is limited. In the present embodiment, the rotation angle of the shaft 82 is greater than 90 degrees.

[0106] like Figure 7 As shown, when the zipper pressing member 32 is in the clamping position, the belt pressing member 50 is also in the clamping position, and the housing 81 is fixed above the fixing piece 52 of the belt pressing member 50. The housing 81 is fixed to the fixing piece 52 at a distance from one end of the fixing piece 52 in the depth direction Y near the front side.

[0107] In addition, the block 87 is fixed to the top end portion of the top of the shaft 82. The block 87 is a rectangular parallelepiped. Two faces of the block 87 face the direction opposite to the conveying direction X and the conveying direction X. The slider pressing member 60 is fixed to one of the remaining four faces of the block 87. As described above, the second displacement mechanism 80 connects the belt pressing member 50 and the slider pressing member 60. As a result, the slider pressing member 60 can be displaced independently of the belt pressing member 50 by the second displacement mechanism 80.

[0108] The slider pressing member 60 is fixed to the shaft 82 via the block 87. The slider pressing member 60 is a bent plate in the present embodiment. The slider pressing member 60 is L-shaped when viewed from the conveying direction X. The slider pressing member 60 includes: a fixing plate 61, which is used to be fixed to the block 87; a pressing plate 62, which is used to press the slider 6; and a bending portion 63, which connects the fixing plate 61 and the pressing plate 62. The fixing plate 61 and the pressing plate 62 are flat plates. The bending portion 63 extends along a straight line in the conveying direction X.

[0109] When the zipper pressing member 32 is in the pressing position, the slider pressing member 60 is also in the pressing position, and the fixing piece 61 is vertical and is located near the front side in the depth direction Y relative to the pressing piece 53 of the belt pressing member 50. When the zipper pressing member 32 is in the pressing position, the pressing piece 62 is horizontal. As a result, Figure 8 As shown, the slider pressing member 60 is located directly above the lower wing plate 12 of the slider 6 when viewed from above, and is in a state of overlapping with the entire surface of the lower wing plate 12. In detail, when viewed from above, the top 62a of the pressing piece 62 is located directly above the lower wing plate 12 of the slider 6. In addition, in addition to the top 62a, the pressing piece 62 also has a connecting portion 62b that connects the top 62a and the bending portion 63. When the zipper pressing member 32 is located in the clamping position, when viewed from above, the connecting portion 62b is in a form that crosses the secondary belt pressing portion 55 in the depth direction Y. The connecting portion 62b and the top 62a are rectangular parallel to the depth direction Y and the conveying direction X. In terms of the dimension of the conveying direction X, the top 62a is longer than the connecting portion 62b. The top 62a protrudes toward the main belt pressing portion 51 side (conveying direction X) compared with the connecting portion 62b.

[0110] like Figure 4 , Figure 6 As shown, the slider pressing member 60 is fixed to the second displacement mechanism 80 in a manner that the height of the slider 6 can be adjusted. In detail, when the zipper pressing member 32 is in the clamping position, a long hole 61h extending in the vertical direction is formed in the fixing plate 61, and a pair of internal threads (not shown) are formed in the block 87 on the surface facing the fixing plate 61 in a manner that is spaced apart in the vertical direction. By screwing the bolts B into the pair of internal threads through the long holes 61h of the fixing plate 61, the fixing plate 61 is clamped by the head of the bolt B and the block 87. As a result, the slider pressing member 60 is fixed to the block 87. In addition, the spacing between the pair of internal threads and the length direction of the long hole 61h are formed so that the position of the fixing plate 61 can be displaced in the vertical direction when the bolt B is slightly loosened. As a result, the height of the slider 6 pressed by the slider pressing member 60 can be adjusted.

[0111] When the sewing device places the sewing object 1 at a predetermined position on the work table 20, the sewing device sews the sewing object 1 according to the following steps 1) to 5).

[0112] 1) The control device drives the conveying mechanism 36 to convey the displacement mechanism 34 and the slider pressing member 60 from the second position toward the first position in the direction opposite to the conveying direction X, so that the slider pressing member 60 moves directly above the sewn object 1 .

[0113] 2) The control device drives the first displacement mechanism 70 (fluid pressure cylinder 70) to move the piston rod 72 downward. As a result, the belt pressing member 50 is displaced from the away position to the pressing position, and the belt pressing member 50 presses the sewn object 1 against the workbench 20 from above the pressing side belt 4a. In detail, the main belt pressing portion 51 presses the pressing side belt 4a on the near side of the depth direction Y relative to the pair of chain element rows 5L, and the auxiliary belt pressing portion 55 presses the pressing side belt 4a on the near side of the depth direction Y relative to the slider 6. As a result, the lower wing plate 12 is tilted relative to the horizontal.

[0114] 3) The control device drives the second displacement mechanism 80 (rotational actuator 80) to rotate the shaft 82 of the rotational actuator 80 in a forward direction. As a result, the slider pressing member 60 is displaced from the away position to the clamping position, and the slider pressing member 60 is pressed against the lower wing plate 12 to keep the lower wing plate 12 substantially parallel to the upper surface of the workbench 20, that is, substantially horizontal. In detail, the lower surface (pressing surface) of the pressing plate 62 of the slider pressing member 60 becomes horizontal. In addition, the pressure of the slider pressing member 60 pressing the slider 6 is less than the pressure of the belt pressing member 50 pressing the belt.

[0115] 4) The control device drives the sewing machine 22 and the conveying mechanism 36 to convey the displacement mechanism 34 and the slider pressing member 60 from the first position to the second position along the conveying direction X. As a result, the sewing side tape 4b and the cloth 2 are sewn together to form a stitch S1.

[0116] 5) The control device stops the sewing machine 22 and drives the first displacement mechanism 70 (fluid pressure cylinder 70) to reciprocate the piston rod 72 of the fluid pressure cylinder 70. As a result, the belt pressing member 50 is displaced from the clamping position to the distance position, and the belt pressing member 50 is moved away from the top of the pressing side belt 4b. In addition, the control device drives the second displacement mechanism 80 to reciprocate the shaft 82 of the rotary actuator 80. As a result, the slider pressing member 60 is displaced from the clamping position to the distance position, and the pressing surface of the pressing piece 62 of the slider pressing member 60 is parallel to the vertical direction. Thereafter, each time the sewn object 1 is placed at a certain position on the workbench 20, steps 1) to 5) are repeated.

[0117] In the sewing device of the first embodiment, the belt pressing member 50 and the slider pressing member 60 are included, so the pressing side belt 4a and the slider 6 are pressed when the sewing side belt 4b and the fabric 2 are sewn together. As a result, the pressing state of the sewn object 1 near the slider 6 is stable, and the sewing state is stable. That is, Fig. 9 As shown, the stitch S1 is formed on the sewn side tape 4b even near the slider 6, and it is difficult to be separated from the sewn side tape 4b.

[0118] In the sewing device of the first embodiment, the belt pressing member 50 includes the main belt pressing portion 51 and the auxiliary belt pressing portion 55, so that the pressing side belt 4a is pressed in the range away from the pair of chain element rows 5L and the slider 6 in the depth direction Y (width direction). As a result, the pressing state of the sewn object 1 near the slider 6 is stable, and the sewing state is stable.

[0119] In the sewing device of the first embodiment, the displacement mechanism 34 includes the first displacement mechanism 70 and the second displacement mechanism 80, so that the belt pressing member 50 is displaced by the first displacement mechanism 70 to press the pressing side belt 4a, and the slider pressing member 60 is displaced by the second displacement mechanism 80 to press the slider 6. As a result, the pressing state of the sewn object 1 near the slider 6 is stable, and the sewing state is stable. In addition, the belt pressing member 50 is pressed against the pressing side belt 4a with an appropriate pressure by the first displacement mechanism 70, and the slider pressing member 60 is pressed against the slider 6 with an appropriate pressure by the second displacement mechanism 80.

[0120] In the sewing device of the first embodiment, when the zipper presser 32 is located at the pressing position, the slider presser 60 is also located at the pressing position, and the slider presser 60 overlaps the entire surface of the lower wing plate 12 when viewed from above, so the pressing state of the slider 6 is stable. As a result, the pressing state of the sewn object 1 near the slider 6 is stable, and the sewing state is stable.

[0121] The present invention is not limited to the above-mentioned embodiment, and can be appropriately changed within the scope of the gist thereof. For example, in the above-mentioned embodiment, the belt pressing member 50 and the slider pressing member 60 are separate structures, but the present invention is not limited to this, and the belt pressing member 50 and the slider pressing member 60 can also be integrated. In this case, the displacement mechanism 34 causes the belt pressing member 50 and the slider pressing member 60 to move together to the separated position and the pressed position.

[0122] In the above embodiment, the first displacement mechanism 70 is an actuator that performs linear reciprocating motion in the vertical direction, but the present invention is not limited to this, and any device that displaces the belt pressing member 50 to the two positions of the pressing position and the distance position may be used, for example, an actuator that performs rotational reciprocating motion. In addition, in the above embodiment, the second displacement mechanism 80 is an actuator that performs rotational reciprocating motion, but the present invention is not limited to this, and any device that displaces the slider pressing member 60 to the two positions of the pressing position and the distance position may be used, for example, an actuator that performs linear reciprocating motion in the vertical direction.

[0123] In the above embodiment, the tape pressing member 50 and the slider pressing member 60 are L-shaped when viewed from the conveying direction X, but the present invention is not limited thereto and may be other shapes.

[0124] In the above embodiment, the zipper 3 is in a state where the slider 6 is in contact with the first stopper 7, but the present invention is not limited to this, as long as the pair of chain element rows 5L are in a closed state. For example, even in a state where the slider 6 is located in the middle of the length direction of the pair of chain element rows 5L, as long as all the chain elements 5 located on the first stopper 7 side relative to the slider 6 are engaged, the pair of chain element rows 5L are in a closed state. In this case, all the chain elements 5 located on the second stopper 8 side relative to the slider 6 are engaged by the slider 6. On the other hand, all the chain elements 5 located on the first stopper 7 side relative to the slider 6 are engaged by using a special locking member having the function of closing the pair of chain element rows 5L instead of the slider 6. In this case, an example of the belt pressing member 50 is the following structure 1) and 2). 1) The length direction dimension of the main belt pressing portion 51 of the belt pressing member 50 is shorter than that of the above embodiment, and the length direction dimension of the secondary belt pressing portion 55 is longer than that of the above embodiment. 2) The belt pressing member 50 includes a pair of main belt pressing portions 51 disposed on both sides of the sub-belt pressing portion 55 in the longitudinal direction.

[0125] In the above-mentioned embodiment, the belt pressing member 50 is a plate in which the pressing piece 53 of the main belt pressing portion 51 and the auxiliary belt pressing portion 55 are connected in the length direction, but the present invention is not limited to this. For example, it may be a structure in which the pressing piece 53 of the main belt pressing portion 51 and the auxiliary belt pressing portion 55 are arranged in a spaced manner in the length direction. In addition, in the above-mentioned embodiment, the pressing piece 53 of the main belt pressing portion 51 is a plate connected to the fixing piece 52 of the main belt pressing portion 51 via the bending portion 54, but the present invention is not limited to this. For example, it may be a structure in which the pressing piece 53 of the main belt pressing portion 51 is connected to the fixing piece 52 of the main belt pressing portion 51 via the bending portion 54 and a plurality of plates are arranged in a spaced manner in the length direction.

Claims

1. A sewing device, wherein a sewing object (1) is an article obtained by placing a zipper (3) on a cloth (2), the sewing device comprising: A workbench (20); a sewing machine (22); and a conveying device (30) which presses the sewn object (1) against the workbench (20) while conveying the sewn object (1) toward the sewing machine (22), wherein the sewing device is characterized in that: The conveying device (30) comprises: a zipper pressing member (32) for pressing the zipper (3); a displacement mechanism (34) for displacing the zipper pressing member (32) to two positions: a position away from the sewn object (1) on the workbench (20) and a pressing position for pressing the sewn object (1) against the workbench (20); and a conveying mechanism (36) for conveying the zipper pressing member (32) and the displacement mechanism (34) toward the sewing machine (22) in order to sew one of the pair of belts (4a, 4b) of the zipper (3) to the fabric (2) by the sewing machine (22). The zipper pressing member (32) comprises: a belt pressing member (50) which presses the other belt (4a) of a pair of belts (4a, 4b); and a slider pressing member (60) which presses the slider (6) of the zipper (3).

2. The sewing device according to claim 1, characterized in that: The belt pressing member (50) comprises a main belt pressing portion (51) and a secondary belt pressing portion (55) for pressing the other belt (4a) in different ranges in the length direction. The main tape pressing portion (51) is a component that presses the other tape (4a) within a range away from a pair of chain element rows (5L) of the slide fastener (3) in the width direction of the slide fastener (3). The sub-tape pressing portion (55) is a component that presses the other tape (4a) within a range away from the slider (6) in the width direction.

3. The sewing device according to claim 1, characterized in that: The displacement mechanism (34) comprises: a first displacement mechanism (70) which causes the belt pressing member (50) to be displaced to two positions: a pressing position where the sewn object (1) is pressed against the workbench (20) from above the other belt (4a) and a distance position away from the other belt (4a); and a second displacement mechanism (80) which causes the slider pressing member (60) to be displaced to two positions: a pressing position where the sewn object (1) is pressed against the workbench (20) from above the slider (6) and a distance position away from the slider (6). The second displacement mechanism (80) can cause the slider pressing member (60) to be displaced independently of the belt pressing member (50).

4. The sewing device according to claim 3, characterized in that: The second displacement mechanism (80) is a rotary actuator.

5. The sewing device according to any one of claims 1 to 4, characterized in that: The sewn object (1) is in a state where the lower wing plate (12) of the slider (6) is located above the upper wing plate (11) of the slider (6), When the zipper pressing piece (32) is located at the pressing position, the slider pressing piece (60) overlaps the entire surface of the lower wing plate (12) when viewed from above.

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