CN113005650A

CN113005650A - Sewing system

Info

Publication number: CN113005650A
Application number: CN202011478841.5A
Authority: CN
Inventors: 柳泽典男; 武田敏之; 小田洋
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2019-12-18
Filing date: 2020-12-15
Publication date: 2021-06-22
Anticipated expiration: 2040-12-15
Also published as: JP7420545B2; CN113005650B; JP2021094261A

Abstract

The invention provides a sewing system, which can manufacture high-quality clothes efficiently. The sewing system is provided with: a sewing machine; a transfer device which has a first roller for performing positive rotation and negative rotation and a second roller for performing positive rotation and negative rotation, and transfers the sewing object to the transfer direction at the sewing position; a first folding device which folds back the end of the sewing object supplied to the sewing position when rotating forward; a second folding device which folds back an end portion of one of a plurality of seams of the sewing object supplied to the sewing position when the sewing object is reversed; and a control device which turns reversely before sewing to fold an end of one of the plurality of seams by the second folding device, turns normally during sewing to fold the rest of the end of the object to be sewn by the first folding device, and sews the folded end of the object to be sewn by the sewing machine.

Description

Sewing system

Technical Field

The present disclosure relates to a sewing system.

Background

In a manufacturing process of clothes having a tubular part such as a cuff or a hem, hem sewing is performed, that is: the end portion of the cylindrical portion of the garment is folded back to form a folded-back portion, and the folded-back portion is sewn with a sewing thread. Patent document 1 discloses an example of a sewing machine capable of performing hemming sewing.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication Hei 04-077874

Disclosure of Invention

Technical problem to be solved

The garment has a front body and a back body joined together at both sides of the tubular part. If the folded-back portion at the end portion where the seam is folded back cannot be hemmed appropriately, the quality of the manufactured garment may be degraded.

The purpose of the present disclosure is to efficiently manufacture high-quality clothes.

(II) technical scheme

According to the present disclosure, there is provided a sewing system including: a sewing machine having a needle bar which holds a sewing machine needle and reciprocates; a transfer device having a first roller and a second roller, and transferring the sewing object to a transfer direction at a sewing position right below the sewing machine needle, wherein the first roller is formed in a cylindrical shape and inserted into a cylindrical portion of the sewing object having a plurality of seams arranged along an axial direction, and performs forward rotation and reverse rotation around a first axis as a center in a state of supporting the sewing object, and the second roller is inserted into the cylindrical portion and performs forward rotation and reverse rotation around a second axis as a center in a state of supporting the sewing object; a first folding device which is arranged between the sewing position and the first roller and folds the end of the sewing object supplied to the sewing position when the first roller and the second roller rotate forward; a second folding device which is arranged between the sewing position and the second roller and folds an end portion of one of the plurality of seams of the sewing object supplied to the sewing position when the first roller and the second roller rotate reversely; and a control device which rotates the first roller and the second roller in reverse before sewing the sewing object, folds an end portion of one of the plurality of seams of the sewing object by the second folding device, rotates the first roller and the second roller in normal rotation when sewing the sewing object, folds the rest of the end portion of the sewing object by the first folding device, and sews the folded end portion of the sewing object by the sewing machine.

(III) advantageous effects

According to the present disclosure, high-quality clothes can be efficiently manufactured.

Drawings

Fig. 1 is a side view schematically showing an example of a sewing system according to the present embodiment.

Fig. 2 is a plan view schematically showing an example of the sewing system of the present embodiment.

Fig. 3 is a side sectional view showing an example of the folding back device of the present embodiment.

Fig. 4 is a perspective view showing an example of the folding back device of the present embodiment.

Fig. 5 is a side view showing an example of the reversing device of the present embodiment.

Fig. 6 is a schematic diagram illustrating a state in which the joint is reversed by the reversing device of the present embodiment.

Fig. 7 is a schematic diagram illustrating a state in which the joint is inverted by the inverting apparatus of the present embodiment, and is a diagram illustrating a state in which gas is injected.

Fig. 8 is a schematic diagram illustrating a positional relationship between the reversing device and the sewing machine according to the present embodiment.

Fig. 9 is a functional block diagram showing an example of the control device according to the present embodiment.

Fig. 10 is a flowchart showing an example of the sewing method according to the present embodiment.

Fig. 11 is a schematic view for explaining an example of the sewing method according to the present embodiment.

Fig. 12 is a flowchart showing an example of the initial adjustment procedure in the present embodiment.

Fig. 13 is a schematic diagram for explaining an example of a conventional sewing method.

Description of the reference numerals

1-a sewing system; 2-a sewing machine; 3-a transfer device; 4-a fold back device; 4F — a first folding device; 4R-second folding means; 5-a reversing device; 6-a drive device; 7-first end detection means (end detection means); 8-second end detection means; 10-a control device; 10A-an arithmetic processing device; 10B-a storage device; 10C-input/output interface; 11-a first end data acquisition section; 11B-sewing position storage part; 12-a second end data acquisition section; 13-a height data acquisition section; 14-a first determination section; 15-a second decision section; 16-a third determination section; 17-a sewing machine control part; 18-transfer device control section; 19-a drive device control section; 20-sewing machine head; 21-a sewing machine needle; 22-needle bar; 23-a presser foot component; 24-a needle plate; 25-a tape loading mechanism; 25B-band; 25M-motor; 25P-pulley; 25S-height sensor; 26-a belt lowering mechanism; 26B-band; 26M-motor; 26P-pulley; 27-an actuator; 28-a transmission mechanism; 31-a first roller; 32-a second roller; 33-a rotary motor; 34-a rotary motor; 35-first gas supply means; 41-inlet; 41A-front entrance; 41B-side entry; 42-a curved channel; 42A-an introduction part; 42B-a receiving portion; 42C-bend; 43-an outlet; 44-a support plate; 45-a guide member; 45A-extension; 45B-a body portion; 46-supply port; 47-internal flow path; 48-second gas supply means; 71-third gas supply means (gas supply means); 81-first roll side detection means; 82-second roll side detection means; AX 1-first axis; AX 2-second axis; e-end; ec-fabric end; eh-flanging the end; PR-fold back; PS-sewing position; s-sewing the object; sb-in; sf-surface; SL-seams; ST-suture; TL-target location; TP-cylindrical portion; TPA-precursor; TPB-hind body.

Detailed Description

Embodiments of the present disclosure will be described below with reference to the drawings, but the present disclosure is not limited thereto. The constituent elements of the embodiments described below may be combined as appropriate. In addition, some of the components may not be used.

[ Sewing system ]

The sewing system 1 of the present embodiment will be explained. In the present embodiment, the positional relationship of each part will be described based on a local coordinate system defined in the sewing system 1. The local coordinate system is defined by an XYZ orthogonal coordinate system. The direction parallel to the X axis in the predetermined plane is set as the X axis direction. The direction parallel to the Y axis in a predetermined plane orthogonal to the X axis is set as the Y axis direction. The direction parallel to the Z axis orthogonal to the predetermined plane is set as the Z axis direction. In this embodiment, a plane including the X axis and the Y axis is referred to as an XY plane. The plane including the X axis and the Z axis is referred to as an XZ plane. A plane including the Y axis and the Z axis is referred to as a YZ plane. The XY plane is parallel to the prescribed plane. The XY plane, XZ plane, YZ plane are orthogonal. In this embodiment, the XY plane is parallel to the horizontal plane. The Z-axis direction is the up-down direction. The + Z direction is upward and the-Z direction is downward. Further, the XY plane may be inclined with respect to the horizontal plane.

Fig. 1 is a side view schematically showing an example of a sewing system 1 according to the present embodiment. Fig. 2 is a plan view schematically showing an example of the sewing system 1 of the present embodiment. The sewing system 1 performs hemming sewing on a sewing object S. The sewing object S is formed in a tubular shape by sewing a front body TPA and a rear body TPB of clothes, which are two pieces of cloth, at a seam SL. The cylindrical portion TP has a plurality of joints SL spaced apart in the circumferential direction and arranged in the axial direction. The plurality of seams SL are two, i.e., the seam SLR and the seam SLL. The seam SLR is located at the right side of the body when the wearer wears the sewing object S. The seam SLL is located at the left side of the body when the wearer wears the sewing object S. The seam SL will be described as a seam SLR when the seam SLR and the seam SLL are not distinguished from each other. The hemming sewing means: an end part Ec of a cylindrical part TP of a sewing object S is folded back to generate a folded-back part PR, and the generated folded-back part PR is sewn with a sewing thread ST. The sewing object S is a garment such as a T-shirt. The tubular portion TP is a hem or cuff of the garment.

The back surface Sb of the sewing object S is: a face that comes into contact with a wearer or with a garment that the wearer has worn when the garment is worn by the wearer. The surface Sf of the sewing object S is: the side facing the outside when the wearer wears the garment without contacting the wearer or the garment already worn by the wearer. The seam SL is formed on the back surface Sb of the sewing object S.

If the seam SL is hemmed in a state of falling toward the rear body TPB side, the wearing comfort is improved. Therefore, the sewing system 1 hems the seam SL in a state of falling toward the rear body TPB side.

As shown in fig. 1 and 2, a sewing system 1 includes: the sewing machine 2, a transfer device 3 that transfers the sewing object S, a folding device 4 that folds an end Ec of the sewing object S, an inverting device 5 that inverts the seam SL at the time of inversion, a driving device 6, a first end detection device (end detection device) 7, a second end detection device 8, and a control device 10.

(Sewing machine)

The sewing machine 2 includes: the sewing machine comprises a sewing head 20, a needle bar 22 holding a sewing needle 21 and reciprocating in a Z-axis direction, a presser foot member 23 pressing a sewing object S, a needle plate 24 inserted into a cylindrical part TP of the sewing object S and supporting a back surface Sb of the sewing object S, an upper belt mechanism 25 arranged at a position facing a surface Sf of the sewing object S and conveying the sewing object S in a conveying direction, and a lower belt mechanism 26 arranged at a position facing the back surface Sb of the sewing object S and conveying the sewing object S in the conveying direction.

The sewing head 20 supports the needle bar 22 so as to be capable of reciprocating in the Z-axis direction. The sewing machine head 20 has: an actuator 27 that generates power for reciprocating the needle bar 22; and a transmission mechanism 28 that transmits the power generated by the actuator 27 to the needle bar 22.

The needle bar 22 holds the sewing needle 21 and reciprocates in the Z-axis direction. The needle bar 22 is supported by the sewing head 20. The needle bar 22 is disposed above the needle plate 24 and can be opposed to the surface Sf of the sewing object S. Two sewing needles 21 are arranged in the X-axis direction. The needle bar 22 holds two sewing needles 21 and reciprocates in the Z-axis direction. A sewing thread ST (upper thread) is hung on the sewing machine needle 21.

The presser foot member 23 presses the sewing object S from above. The presser foot member 23 is supported by the sewing head 20. The presser foot member 23 is disposed above the needle plate 24 and contacts the surface Sf of the sewing object S. The sewing object S is held between the presser foot member 23 and the needle plate 24.

The needle plate 24 is inserted into the cylindrical portion TP of the sewing object S and supports the back surface Sb of the sewing object S. The needle plate 24 supports the sewing object S from below. A pot (not shown) is disposed below the needle plate 24. The kettle contains a spool in which a spool box is housed. The kettle rotates in synchronization with the reciprocating movement of the needle bar 22. The suture ST is fed from the kettle (down line).

When the needle bar 22 descends, the sewing machine needle 21 held by the needle bar 22 penetrates the sewing object S and passes through a hole provided in the needle plate 24. When the sewing needle 21 passes through the hole of the needle plate 24, the lower thread supplied from the pot is hung on the upper thread hung on the sewing needle 21. The sewing machine needle 21 ascends in a state where the lower thread is hung on the upper thread. The needle bar 22 reciprocates in the Z-axis direction in synchronization with the transfer by the transfer device 3. Thereby sewing the sewing object S with the sewing thread ST.

In the following description, a position directly below the sewing needle 21 is referred to as a sewing position PS. In the XY plane, the sewing position PS coincides with the position of the sewing needle 21. The sewing machine needle 21 penetrates the sewing object S at the sewing position PS. The sewing machine needles 21 are provided in two numbers, and sewing positions PS are defined in two locations.

The upper belt mechanism 25 is disposed above the sewing object S disposed at the sewing position PS. The tape loading mechanism 25 includes: a belt 25B which is in contact with the surface Sf of the sewing object S; a motor 25M that generates power to move the belt 25B; and a plurality of pulleys 25P supporting the belt 25B. The belt 25B is endless. When the motor 25M operates, the belt 25B supported by the plurality of pulleys 25P rotates. The belt 25B in contact with the surface Sf of the sewing object S moves in the transfer direction in which the sewing object S is transferred by the transfer device 3.

The upper belt mechanism 25 may have a height sensor 25S, and the height sensor 25S detects a change in height of the upper belt mechanism 25 in the Z-axis direction. The height sensor 25S detects the height of the sewing object S located at the sewing position PS in the reciprocating direction of the sewing needle 21. The height sensor 25S detects a change in the Z-axis direction height of the upper belt mechanism 25 with respect to a fixed mount, not shown, of the sewing machine 2. The height sensor 25S detects a change in the thickness of the sewing object S held between the upper belt mechanism 25 and the lower belt mechanism 26 as a change in the Z-axis direction height of the upper belt mechanism 25. When the seam SL of the sewing object S is located between the upper belt mechanism 25 and the lower belt mechanism 26, the sewing object S becomes thick, and therefore the upper belt mechanism 25 is displaced in the + Z direction. The detection result of the height sensor 25S is output to the height data acquisition unit 73 of the control device 10.

The lower belt mechanism 26 is disposed below the sewing object S disposed at the sewing position PS. The lower belt mechanism 26 has: a belt 26B which contacts the back surface Sb of the sewing object S; a motor 26M that generates power for moving the belt 26B; and a plurality of pulleys 26P supporting the belt 26B. The belt 26B is endless. When the motor 26M is operated, the belt 26B supported by the plurality of pulleys 26P rotates. The belt 26B contacting the back surface Sb of the sewing object S moves in the transfer direction in which the sewing object S is transferred by the transfer device 3.

(transfer device)

The transfer device 3 transfers the sewing object S in the transfer direction at the sewing position PS. The sewing object S transferred by the transfer device 3 has a transfer direction in the positive rotation direction + Y direction and a transfer direction in the negative rotation direction-Y direction.

The transfer device 3 includes a first roller 31 and a second roller 32, wherein the first roller 31 is inserted into the cylindrical portion TP of the sewing object S and rotates forward and backward around a first axis AX1 in a state of supporting the sewing object S; the second roller 32 is inserted into the cylindrical portion TP of the sewing object S, and rotates forward and backward around the second axis AX2 in a state where the sewing object S is supported. The first roller 31 is disposed on the upstream side in the conveying direction in the normal rotation, i.e., on the-Y side, with respect to the sewing position PS. The second roller 32 is disposed on the + Y side, which is the downstream side in the transfer direction in the normal rotation, with respect to the sewing position PS. The first axis AX1 is a rotation center axis of the first roller 31. The second axis AX2 is a rotation center axis of the second roller 32. The first axis AX1 is parallel to the second axis AX 2. The first axis AX1 and the second axis AX2 are parallel to the X axis, respectively.

In the normal rotation, the first roller 31 is rotated in the normal direction to supply the sewing object S to the sewing position PS, and the second roller 32 is rotated in the normal direction to collect the sewing object S from the sewing position PS. In the reverse rotation, the second roller 32 is reversed to supply the sewing object S to the sewing position PS, and the first roller 31 is reversed to collect the sewing object S from the sewing position PS.

The transfer device 3 includes a rotation motor 33 and a rotation motor 34, wherein the rotation motor 33 is connected to the first roller 31 and generates power for rotating the first roller 31; the rotation motor 34 is connected to the second roller 32 and generates power for rotating the second roller 32.

The first roller 31 and the second roller 32 are inserted into the tubular portion TP of the sewing object S, and rotate in the same direction and at the same speed in the normal direction or in the reverse direction while being in contact with the back surface Sb of the sewing object S. Thereby, the sewing object S is transferred in the + Y direction or the Y direction transfer direction at the sewing position PS.

The transfer device 3 revolves the sewing object S around the first roller 31 and the second roller 32. The sewing machine 2 sews the folded part PR of the sewing object S generated by the folding device 4 with a sewing thread ST at the time of normal rotation. The transfer device 3 transfers a folded portion PR of a sewing object S sewn with a stitch ST in the sewing machine 2 to the first roller 31 via the second roller 32.

The first gas supply device 35 may be disposed in the transfer device 3. The first gas supply device 35 restricts the hanging of the sewing object S revolving around the first roller 31 and the second roller 32 due to its own weight. The first gas supply device 35 injects gas in the-X direction with respect to the cylindrical portion TP. There is no limitation on the position where the first gas supplying means 35 is disposed. The first gas supply device 35 is disposed closer to the-Z direction than the sewing object S revolving around the first roller 31 and the second roller 32, for example. The first gas supply device 35 may be disposed, for example, inside the cylindrical portion TP provided in the first roller 31 and the second roller 32, or at an axial end of the first roller 31 and the second roller 32.

(folding back device)

Fig. 3 is a side sectional view showing an example of the folding back device 4 of the present embodiment. Fig. 4 is a perspective view showing an example of the folding back device 4 of the present embodiment. The folding device 4 folds the end Ec of the sewing object S supplied to the sewing position PS toward the back surface Sb. The folding device 4 includes a first folding device 4F and a second folding device 4R, wherein the first folding device 4F is disposed between the first roller 31 and the sewing position PS; the second folding device 4R is disposed between the second roller 32 and the sewing position PS. Since the first folding device 4F is configured similarly to the second folding device 4R, the folding device 4 will be described as a folding device 4 when it is not necessary to distinguish the first folding device 4F from the second folding device 4R. The first folding device 4F operates in the normal rotation, and the second folding device 4R operates in the reverse rotation.

The folding device 4 has an inlet 41, a curved path 42, and an outlet 43, wherein the inlet 41 is inserted with an end Ec of the sewing object S before folding; the curved path 42 is connected to the inlet 41 and can fold back the sewing object S; the outlet 43 is connected to the curved path 42 and feeds out the folded part PR of the sewing object S generated in the curved path 42.

The inlet 41 includes: a front inlet 41A opening to the-X side, and a side inlet 41B opening to the-Y side. The outlet 43 opens to the + Y side.

The folding back device 4 includes a support plate 44 and a guide member 45, wherein the support plate 44 supports the back surface Sb of the sewing object S; the guide member 45 guides the end Ec of the sewing object S so that the end Ec of the sewing object S is folded back toward the back surface Sb. The curved passage 42 is provided between the support plate 44 and the guide member 45.

The guide member 45 has a protruding portion 45A and a main body portion 45B, wherein the protruding portion 45A is disposed on the + Z side with respect to the upper surface of the support plate 44; the body 45B is disposed closer to the Z side than the lower surface of the support plate 44. The end of the support plate 44 on the + X side overlaps the protruding portion 45A in the XY plane. The front entrance 41A is provided between the upper surface of the support plate 44 and the-X-side end of the protruding portion 45A.

In the XZ plane, the curved passage 42 is formed in a U-shape. The curved passage 42 has: an introduction portion 42A, a housing portion 42B, and a bent portion 42C, wherein the introduction portion 42A is connected to the inlet 41 and provided between the upper surface of the support plate 44 and the protruding portion 45A; the storage portion 42B is provided between the lower surface of the support plate 44 and the main body portion 45B; the bent portion 42C connects the introduction portion 42A and the housing portion 42B.

The end Ec of the sewing object S transferred from the Y side to the folding device 4 by the folding device 4 is inserted into the introduction portion 42A of the curved path 42 through the front entrance 41A and the side entrance 41B. A position shifted by the target value Wr in the + X direction from the portion closest to the + X side of the curved portion 42C of the curved passage 42 is the target position TL. When the sewing object S is moved in the + X direction so that the end Ec is located at the target position TL in a state where the end Ec of the sewing object S is located at the entrance 41 of the curved path 42, the end Ec is inserted into the curved path 42 and folded back in the curved path 42 so that the folding width Ws becomes the target value Wr. After the end Ec is inserted into the introduction portion 42A, when the sewing object S is transferred in the Y direction, the end Ec of the sewing object S passes through the curved portion 42C of the curved path 42 while being guided by the guide member 45, and moves toward the storage portion 42B. Thus, the end Ec of the sewing object S is folded back toward the back surface Sb of the sewing object S, and a folded back portion PR is generated. The folded part PR of the sewing object S generated by the curved path 42 is fed out from the outlet 43 opened to the + Y side and transferred to the sewing position PS.

The folding back device 4 has a supply port 46 and a second gas supply device 48, wherein the supply port 46 can supply gas to the housing portion 42B; the second gas supply device 48 supplies gas to the supply port 46 through an internal flow path 47 provided in the guide member 45. The supply port 46 supplies gas in the-X direction. The end Ec of the sewing object S inserted to the boundary between the storage portion 42B and the curved portion 42C moves in the-X direction in the storage portion 42B by the force of the gas supplied from the supply port 46. Thus, the end Ec of the sewing object S is smoothly folded back by the action of the shape of the curved path 42 and the force of the gas supplied from the supply port 46. In the present embodiment, the end Ec is folded back to the-X side in the folding back device 4.

The folded back portion PR of the seam SL of the sewing object S generated by the curved path 42 is inclined in the insertion direction toward the Y-axis direction of the folding back device 4. More specifically, the first folding device 4F folds the end Ec of the sewing object S supplied to the sewing position PS at the time of normal rotation. The first folding device 4F folds the seam SLR of the sewing object S in the normal rotation. In the first folding device 4F, the insertion direction of the end Ec toward the Y axis direction of the first folding device 4F is the + Y direction, and the folded portion PR of the seam SLR of the sewing object S is formed so as to incline in the-Y direction. The second folding device 4R folds an end Ec of one seam SLs of the plurality of seams SL of the sewing object S supplied to the sewing position PS at the time of reverse rotation. In the second folding device 4R, the insertion direction of the end Ec toward the Y axis direction of the second folding device 4R is the-Y direction, and the folded portion PR of the seam SLL of the sewing object S is formed so as to incline in the + Y direction.

(inverting device)

Fig. 5 is a side view showing an example of the reversing device 5 of the present embodiment. Fig. 6 is a schematic diagram illustrating a state where the seam SL is reversed by the reversing device 5 of the present embodiment. Fig. 7 is a schematic diagram illustrating a state in which the joint SL is inverted by the inverting apparatus 5 of the present embodiment, and is a diagram illustrating a state in which gas is injected. Fig. 8 is a schematic diagram illustrating a positional relationship between the reversing device 5 and the sewing machine 2 according to the present embodiment. The reversing device 5 is disposed between the second folding device 4R and the sewing machine 2. The reversing device 5 operates at the time of reverse rotation. The inverting device 5 is a device in which: the reversing device 5 causes the folded portion PR of the end Ec of the seam SLL of the sewing object S folded by the second folding device 4R to tilt in the + Y direction, which is the opposite direction with respect to the transfer direction during reversing. The inverter 5 has: a spoon pressing part 51, a supply port 52 and an air cylinder 53.

The reversing device 5 is disposed between the cloths of the folded portion PR of the seam SLL folded by being tilted in the + Y direction by the second folding device 4R. The spatula portion 51 is disposed so as to be able to advance and retreat with respect to the folded portion PR of the seam SLL via the cylinder 53. The spatula portion 51 is disposed at a position capable of abutting against the folded portion PR of the seam SLL at the time of reverse rotation, and is retracted to a position not abutting against the folded portion PR of the seam SLL except at the time of reverse rotation. The spatula portion 51 contacts the folded portion PR of the seam SLL at the time of reverse rotation, and the folded portion PR of the seam SLL falls in the + Y direction. Then, the gas is ejected from the supply port 52 toward the folded portion PR of the joint SLL in the + Y direction. Thereby, the folded part PR of the seam SLL is transferred to the sewing machine 2 while being tilted in the + Y direction during the reverse rotation.

Preferably, the reversing device 5 is disposed in the vicinity of the sewing position PS so as to keep the folded portion PR of the seam SLL inclined in the + Y direction, so that sewing can be performed by the sewing machine 2. The folded portion PR is sandwiched between the spatula portion 51 and the lower belt mechanism 26 of the sewing machine 2, and an end portion 51A of the spatula portion 51 on the lower belt mechanism 26 side of the sewing machine 2 is chamfered in order to suppress the interference with the transfer of the sewing object S or the damage of the sewing object S.

(drive device)

The drive device 6 moves the first roller 31 in the X-axis direction parallel to the first axial center AX 1. The driving device 6 includes a linear actuator that generates power for moving the first roller 31 in the X-axis direction. The driving device 6 moves the first roller 31 in the X-axis direction together with the rotating motor 33 by moving the rotating motor 33 in the X-axis direction. The driving device 6 may move the first roller 31 in the X-axis direction by moving a shaft member connecting the rotary motor 33 and the first roller 31 in the X-axis direction.

A frictional force is generated between the first roller 31 and the sewing object S supported by the first roller 31. When the first roller 31 moves in the X-axis direction, the sewing object S supported by the first roller 31 moves in the X-axis direction together with the first roller 31.

(first end detecting device)

The first end detection device 7 detects an end Ec of the sewing object S on the transfer device 3. The first end detection device 7 detects the cloth end Ec of the sewing object S supplied to the sewing position PS. The first end detection device 7 detects the sewing object S between the first roller 31 and the first folder 4F. More specifically, the first end detection device 7 detects: an end Ec of the sewing object S before being folded back by the folding-back device 4, an end Eh of the sewing object S after being folded back by the folding-back device 4, and a sewing thread ST sewing the folded-back portion PR. The detection method of the first end detection device 7 is not limited. The first end detection device 7 may detect the end Ec, the end Eh, and the suture line ST by, for example, performing image processing on image data obtained by imaging the sewing object S. The first end detection device 7 may detect the end Ec, the end Eh, and the suture ST by various sensors, for example. The first end data, which is the detection result of the first end detection device 7, is output to the first end data acquisition unit 11 of the control device 10.

In the following description, an end Ec of the sewing object S before being folded back by the folding-back device 4 is referred to as a cloth end Ec, and an end Eh of the sewing object S after being folded back by the folding-back device 4 is referred to as a hem end Eh. The cloth end Ec and the hem end Eh are referred to as an end E.

For example, in a state where the folded part PR of the seam SLL of the sewing object S subjected to hemming sewing is returned to the sewing position PS, the first end data indicates that the hemming end Eh and the seam ST are positioned on both sides in the transfer direction with respect to the sewing position PS.

(third gas supply device)

The first end detection device 7 may have a third gas supply device (gas supply device) 71. The third gas supply device 71 injects gas so as to extend the folded portion PR of the end Ec of the sewing object S folded by the second folding device 4R. The third gas supply device 71 sprays gas to the cloth end Ec of the sewing object S transferred to the first end detection device 7 to extend in the + X direction. The third gas supply device 71 is disposed between the first folding device 4F and the first end detection device 7. When the sewing object S is reversed, the cloth end Ec of the sewing object S near the seam SLL may be affected by the folded portion PR of the seam SLL folded by the second folding device 4R, and may be bent or deformed. When the cloth end Ec of the sewing object S transferred to the first end detection device 7 is bent or deformed, an accurate detection result may not be obtained in the first end detection device 7.

(second end detection device)

The second end detection device 8 detects whether the cloth end Ec of the sewing object S is disposed at an appropriate position in the + X direction in the-Z direction, which cannot be visually checked by the operator, when the tubular portion TP is provided on the first roller 31 and the second roller 32. The method of detecting the cloth edge Ec of the sewing object S by the second edge detection device 8 is not limited. The second end detection device 8 may detect the cloth end Ec of the sewing object S by performing image processing on image data obtained by imaging the first roller 31 and the second roller 32 from the-Z direction, for example. The second end detection device 8 may detect the cloth end Ec of the sewing object S by various sensors, for example. The second end data, which is the detection result of the second end detection device 8, is output to the second end data acquisition unit 72 of the control device 10.

The second end detection device 8 includes: a first roller side detection device 81 for detecting a cloth end Ec of the sewing object S on the-Z side of the first roller 31; and a second roller side detection device 82 for detecting the cloth end Ec of the sewing object S on the-Z side of the second roller 32. The second end detection device 8 will be described as a case where it is not necessary to distinguish between the first roller side detection device 81 and the second roller side detection device 82.

(control device)

Fig. 9 is a functional block diagram showing an example of the control device 10 according to the present embodiment. The controller 10 controls the sewing machine 2, the transfer device 3, and the driving device 6. The control device 10 outputs a control signal for controlling the sewing system 1.

The control device 10 reverses the first roller 31 and the second roller 32 before sewing the object S to be sewn, and folds the end Ec of one seam SLL of the plurality of seams SL of the object S to be sewn by the second folding device 4R. The controller 10 rotates the first roller 31 and the second roller 32 forward when sewing the object S to be sewn, and turns back the remaining portion of the end Ec of the object S to be sewn by the first turning back device 4F. The controller 10 sews a folded portion PR of a folded end Ec of the sewing object S with the sewing machine 2.

The control device 10 starts the sewing by the sewing machine 2 when the folded-back portion PR of the end Ec of the seam SLL of the sewing object S folded back by the second folding-back device 4R is determined to be located at the sewing position PS based on the detection result of the height sensor 25S.

The control device 10 ends the sewing by the sewing machine 2 when it is determined that the entire circumference of the cloth end Ec of the sewing object S is sewn based on the detection result of the first end detection device 7.

The control device 10 includes a computer system. The control device 10 includes: an arithmetic Processing device 10A, a storage device 10B, and an input/output interface 10C, wherein the arithmetic Processing device 10A includes a processor such as a CPU (Central Processing Unit); the storage device 10B includes a nonvolatile Memory such as a ROM (Read Only Memory) or a storage device, and a volatile Memory such as a RAM (Random Access Memory); the input/output interface 10C includes an input/output circuit capable of inputting/outputting signals and data.

The input/output interface 10C of the control device 10 is connected to: an actuator 27 for moving the needle bar 22 in the Z-axis direction, a motor 25M of the upper belt mechanism 25, a height sensor 25S, a motor 26M of the lower belt mechanism 26, a rotary motor 33 for rotating the first roller 31, a rotary motor 34 for rotating the second roller 32, a driving device 6 for moving the first roller 31 in the X-axis direction, the first end detection device 7, and the second end detection device 8.

The arithmetic processing device 10A includes: a first end data acquisition unit 11, a second end data acquisition unit 12, a height data acquisition unit 13, a first determination unit 14, a second determination unit 15, a third determination unit 16, a sewing machine control unit 17, a transfer device control unit 18, and a drive device control unit 19.

The first end data acquiring unit 11 acquires the first end data acquired by the first end detecting device 7.

The second end data acquiring unit 12 acquires the second end data acquired by the second end detecting device 8.

The height data acquisition unit 13 acquires height data acquired by the height sensor 25S.

The first determination unit 14 determines whether or not the cloth end Ec of the sewing object S is disposed at an appropriate position in the + X direction in the-Z direction, which cannot be visually confirmed by the operator, when the tubular portion TP is provided on the first roller 31 and the second roller 32. More specifically, the first determination unit 14 determines whether or not the tubular portion TP is disposed at an appropriate position in the + X direction of the first roller 31 and the second roller 32 based on the second end data acquired by the second end data acquisition unit 12.

The second determination unit 15 determines: whether or not the folded-back portion PR of the seam SLL folded back by the second folding-back device 4R is located at a sewing position PS which is a sewing start position of the sewing machine 2. More specifically, the second determination unit 15 determines whether or not the folded-back portion PR of the seam SLL is located at the sewing position PS based on the height data acquired by the height data acquisition unit 13. When the height data is higher than the height of the normal folded back portion PR other than the seam SL, the second determination unit 15 determines that the folded back portion PR of the seam SLL is located at the sewing position PS.

The third determination unit 16 determines whether hemming sewing is finished. More specifically, the third determination unit 16 determines whether or not the entire circumference of the folded portion PR of the object S to be sewn is hemmed based on the first end data acquired by the first end data acquisition unit 11. The third determination unit 16 determines that hemming sewing is performed on the entire circumference of the folded portion PR of the sewing object S when the first end data indicates that the folded portion PR of the seam SLL subjected to hemming sewing is returned to the sewing position PS. When the first end data indicates that the hem end Eh and the seam ST are positioned on both sides in the feed direction with respect to the sewing position PS, the folded portion PR of the seam SLL subjected to hem sewing returns to the sewing position PS.

The sewing machine control section 17 outputs control signals for controlling the actuator 27, the motor 25M, and the motor 26M, respectively. The sewing machine control section 17 controls the

motors

25M and 26M so that the

belts

25B and 26B move in synchronization with the transfer of the transfer device 3.

The transfer device control unit 18 outputs control signals for controlling the rotation motor 33 and the rotation motor 34, respectively. The transfer device controller 18 controls the rotation motor 33 and the rotation motor 34 so that the first roller 31 and the second roller 32 rotate in the same direction at the same speed.

The driving device control section 19 outputs a control signal for controlling the driving device 6 based on the first end data acquired in the first end detection device 7.

The storage device 10B has a sewing position storage section 11B. The sewing position storage unit 11B stores a sewing position PS in the XY plane. The sewing position PS is a position directly below the sewing machine needle 21, and is known data derived from design data of the sewing machine 2, for example.

[ Sewing method ]

Next, a sewing method using the sewing system 1 of the present embodiment will be described. Fig. 10 is a flowchart showing an example of the sewing method according to the present embodiment. Fig. 11 is a schematic view for explaining an example of the sewing method according to the present embodiment. The sewing method comprises the following steps: an initial adjustment step SP1 and a hemming sewing step SP2, in the initial adjustment step SP1, the position of the sewing object S mounted on the transfer device 3 is adjusted before hemming sewing is performed; in the hem sewing step SP2, the folded-back portion PR is generated while the sewing object S is conveyed, and the generated folded-back portion PR is sewn with the sewing thread ST.

(initial adjustment step)

The initial adjustment step SP1 is explained. Fig. 12 is a flowchart showing an example of the initial adjustment procedure in the present embodiment.

The operator mounts the sewing object S on the transfer device 3 (step SP 11). The operator mounts the sewing object S on the first roller 31 and the second roller 32 such that the needle plate 24, the first roller 31, and the second roller 32 are inserted into the tubular portion TP of the sewing object S, respectively. As shown in the first upper diagram of fig. 11, the operator mounts the sewing object S such that the seam SLR of the sewing object S is positioned in the + Y direction of the first roller 31 and the seam SLL is positioned in the-Y direction of the second roller 32. The operator places a part of the cloth end Ec of the sewing object S at the entrance 41 of the second folding device 4R. A part of the sewing object S is disposed between the sewing machine needle 21 and the needle plate 24. A part of the back surface Sb of the sewing object S is supported by the first roller 31. A part of the back surface Sb of the sewing object S is supported by the second roller 32.

The first end detection device 7 detects the cloth end Ec of the sewing object S supplied to the sewing position PS (step SP 12). The control device 10 acquires the first end portion data acquired by the first end portion detection device 7 by the first end portion data acquisition unit 11.

The second end detection device 8 detects the cloth end Ec of the sewing object S in the-Z direction of the first roller 31 and the second roller 32 (step SP 13). The control device 10 acquires the second end data acquired by the second end detection device 8 by the second end data acquisition unit 12.

In step SP13, the control device 10 may further determine whether the sewing object S is inserted into the appropriate position in the + X direction of the first roller 31 and the second roller 32 based on the second end data acquired by the second end data acquiring unit 12 by the first determining unit 14. If the first determination unit 14 determines that the sewing object S is inserted at the proper position, the process of step SP14 is performed. When the first determination unit 14 determines that the sewing object S is not inserted into the proper position, a warning lamp, not shown, is turned on or a warning sound is output from a microphone, not shown, to notify the operator that the sewing object S is not inserted into the proper position.

The driving device control unit 19 controls the driving device 6 based on the first end data detected by the first end detection device 7, and adjusts the position of the first roller 31 in the X-axis direction and the position of the cloth end Ec in the X-axis direction so that the cloth end Ec moves to the target position TL defined in the second folding device 4R (step SP 14). The driving device control unit 19 adjusts the position of the first roller 31 in the X-axis direction based on the first end data detected by the first end detection device 7 so that the cloth end Ec is parallel to the Y-axis direction and the cloth end Ec is disposed at the inlet 41 of the second folding device 4R or the introduction portion 42A. After the cloth end Ec is parallel to the Y-axis direction and the cloth end Ec is disposed at the inlet 41 or the introduction portion 42A of the second folding device 4R, the driving device control portion 19 adjusts the position of the first roller 31 in the X-axis direction based on the first end data detected by the first end detection device 7 so that the cloth end Ec moves to the target position TL defined in the second folding device 4R.

Further, the controller 10 operates the second gas supply device 48 of the second folding device 4R. By the operation of the second gas supply device 48, gas is supplied from the supply port 46 to the housing portion 42B of the curved duct 42. Thereby, the second folding device 4R folds the fabric end Ec to generate a folded portion PR.

The transfer device control unit 18 outputs control signals to the rotary motor 33 and the rotary motor 34 to rotate the first roller 31 and the second roller 32 of the transfer device 3 in reverse (step SP 15). When the first roller 31 and the second roller 32 of the transfer device 3 are reversed, the second folding device 4R and the reversing device 5 are operated. In step SP15, as shown in the second drawing from the top in fig. 11, the folded back portion PR is generated in the second folding device 4R. The folded portion PR of the seam SLL folded by the second folding device 4R contacts the inverting device 5 and falls in the + Y direction. While the transfer device control unit 18 operates the transfer device 3, the height data acquired by the height sensor 25S is acquired by the height data acquisition unit 13.

The transfer device control unit 18 adjusts the position of the folded back portion PR of the seam SLL in the transfer direction at the time of inversion (step S16). More specifically, the first roller 31 and the second roller 32 are reversed until the second determination unit 15 determines that the folded-back portion PR of the seam SLL is located at the sewing position PS as shown in the third upper drawing in fig. 11 based on the height data acquired by the height data acquisition unit 13. When the folded part PR of the seam SLL is determined to be located at the sewing position PS, the reverse rotation of the first roller 31 and the second roller 32 is stopped. In addition, the inverting apparatus 5 is stopped.

As described above, the initial adjustment step SP1 ends.

(hemming sewing step)

Next, the hemming sewing step SP2 will be described. The control device 10 performs hemming sewing by the sewing machine 2. Before performing hemming sewing, the position of the fabric end Ec is adjusted for the first folding device 4F, in the same manner as in step SP14 of the initial adjustment step SP 1.

The sewing machine control section 17 outputs a control signal for operating the actuator 27. The needle bar 22 holding the sewing needle 21 is reciprocated in the Z-axis direction by the operation of the actuator 27. The sewing machine control unit 17 outputs control signals for operating the

motors

25M and 26M. The belt 25B is moved in contact with the front surface Sf of the sewing object S by the operation of the motor 25M, and the belt 26B is moved in contact with the back surface Sb of the sewing object S by the operation of the motor 26M. The transfer device control unit 18 outputs a control signal for operating the rotary motor 33 and the rotary motor 34. The first roller 31 is rotated forward by the operation of the rotating motor 33 in a state where the back surface Sb of the sewing object S is supported. The second roller 32 is rotated forward by the operation of the rotating motor 34 in a state where the rear surface Sb of the sewing object S is supported. In this way, the transfer device 3 revolves the sewing object S around the first roller 31 and the second roller 32 in a normal rotation manner. When the first roller 31 and the second roller 32 of the transfer device 3 rotate in the normal direction, the first folding device 4F operates. The sewing is started from a state in which the folded-back portion PR of the seam SLL generated in the second folding device 4R is disposed at the sewing position PS as shown in the third diagram from the top in fig. 11. In the state shown in the fourth and fifth figures from the top in fig. 11, the non-folded cloth end Ec of the sewing object S is folded back by the first folding device 4F. The folded part PR of the sewing object S generated by the first folding device 4F is transferred to the sewing position PS. The sewing machine 2 sews the folded part PR transferred to the sewing position PS with the sewing thread ST.

As shown in the lowermost drawing of fig. 11, the control device 10 outputs a control signal for stopping the actuator 27 by the sewing machine control unit 17 when the sewing object S makes one turn around the first roller 31 and the second roller 32 and the folded-back portion PR of the seam SLL generated by the second folding device 4R is returned to the sewing position PS. When the third determination unit 16 determines that the hemming sewing is completed, the sewing machine control unit 17 outputs a control signal for stopping the actuator 27.

The control device 10 operates the first gas supply device 35 while the first roller 31 and the second roller 32 are operating, and restricts the hanging down of the sewing object S revolving around the first roller 31 and the second roller 32 due to its own weight.

The control device 10 operates the third gas supply device 71 while the first end detection device 7 is operating, and sprays gas to the cloth end Ec of the sewing object S transferred to the first end detection device 7 to extend in the + X direction.

As described above, the sewing system 1 includes the first folding device 4F and the second folding device 4R disposed with the sewing position PS therebetween. Before the sewing process by the sewing machine 2, the first roller 31 and the second roller 32 of the transfer device 3 are reversed, and the second folding device 4R folds the seam SLL of the sewing object S toward the rear body TPB to form a folded portion PR. When sewing is performed by the sewing machine 2, the first folding device 4F folds the remaining portion of the fabric end Ec of the sewing object S to generate a folded portion PR. The first folding device 4F folds the seam SLR of the sewing object S toward the rear body TPB to generate a folded portion PR. The sewing machine 2 folds back and hems the fold back portion PR in a state where both the seam SLL and the seam SLR of the sewing object S are inclined toward the back body TPB side.

[ Effect ]

As described above, in the present disclosure, before the sewing process by the sewing machine 2, the folded-back portion PR can be generated by the second folding-back device 4R folding back the seam SLL of the sewing object S toward the rear body TPB. In the present disclosure, when sewing is performed by the sewing machine 2, the first folding device 4F can fold the seam SLR of the sewing object S toward the rear body TPB to generate the folded portion PR. According to the present disclosure, the seam SLL and the seam SLR of the sewing object S can be folded back and hemmed in the fold back portion PR while both of them are tilted toward the back body TPB side. According to the present disclosure, the comfort of the sewn garment when worn can be improved. Therefore, the sewing system 1 can efficiently manufacture high-quality clothes.

In the present disclosure, the sewing machine 2 can be transferred in a state where the turning portion PR of the seam SLL of the sewing object S turned back by the second turning device 4R is tilted in the + Y direction by the reversing device 5. According to the present disclosure, it is possible to suppress: while the second folding device 4R is folded and is transferred to the sewing machine 2, the folded portion PR of the seam SLL is tilted in the-Y direction.

Fig. 13 is a schematic diagram for explaining an example of a conventional sewing method. In a conventional sewing system, as shown in fig. 13, a cloth end Ec of a sewing object S is folded over the entire circumference by a folding device 4. In the conventional sewing system, the seam SLR of the sewing object S is folded back toward the front body TPA side, and the seam SLL is folded back toward the rear body TPB side. The clothing thus sewn may have reduced comfort when worn.

In the present disclosure, it is determined based on the detection result of the height sensor 25S that: whether or not the folded-back portion PR of the seam SLL of the sewing object S folded back by the second folding-back device 2R is located at the sewing position PS. Thus, in the present disclosure, it is possible to detect that the seam SLL of the sewing object S is located at the sewing position PS, and start the sewing process at an appropriate timing.

In the present disclosure, the first end detection device 7 includes a third gas supply device 71, and the third gas supply device 71 injects gas so as to stretch a folded portion PR of a seam SLL of the sewing object S folded by the second folding device 2R. According to the present disclosure, when the cloth edge Ec of the sewing object S in the transfer device 3 is detected by the first edge detection device 7, the cloth edge Ec of the sewing object S can be made flat without being bent or deformed, and is suitable for detection.

In the present disclosure, the first gas supply device 35 restricts the hanging down of the sewing object S revolving around the first roller 31 and the second roller 32 due to its own weight. According to the present disclosure, the wrapping of the sewing object S around the first roller 31 and the second roller 32 is eliminated, and the sewing object S can be smoothly transferred.

In the present disclosure, the second end detection device 8 detects whether the cloth end Ec of the sewing object S is disposed at an appropriate position in the + X direction in the-Z direction, which cannot be visually confirmed by the operator. According to the present disclosure, the burden on the operator can be reduced, thereby improving operability.

[ other embodiments ]

In the above embodiment, the needle bar 22 holds two sewing needles 21. The needle bar 22 may hold one sewing needle 21, or may hold three or more sewing needles 21.

The configuration of the first end detection device 7 described in the above embodiment is merely an example, and is not limited as long as it can detect an appropriate timing for ending hemming sewing.

Claims

1. A sewing system is provided with:

a sewing machine having a needle bar which holds a sewing machine needle and reciprocates;

a transfer device having a first roller and a second roller, and transferring a sewing object to a transfer direction at a sewing position right below a sewing machine needle, wherein the first roller is formed in a cylindrical shape and inserted into a cylindrical portion of the sewing object having a plurality of seams arranged along an axial direction, and performs normal rotation and reverse rotation around a first axis as a center in a state where the sewing object is supported, and the second roller is inserted into the cylindrical portion and performs normal rotation and reverse rotation around a second axis as a center in a state where the sewing object is supported;

a first folding device which is arranged between the sewing position and the first roller and folds the end of the sewing object supplied to the sewing position when the first roller and the second roller rotate forward;

a second folding device which is arranged between the sewing position and the second roller and folds an end portion of one of the plurality of seams of the sewing object supplied to the sewing position when the first roller and the second roller rotate reversely; and

and a control device that rotates the first roller and the second roller in reverse before sewing the object to be sewn, that folds back an end portion of one of the plurality of seams of the object to be sewn by the second folding device, that rotates the first roller and the second roller in normal when sewing the object to be sewn, that folds back the remaining portion of the end portion of the object to be sewn by the first folding device, and that sews the folded-back end portion of the object to be sewn by the sewing machine.

2. The sewing system of claim 1,

the sewing machine further includes an inverting device that is disposed between the second folding device and the sewing machine and inverts an end portion of the sewing object folded back by the second folding device with respect to a transport direction at the time of inversion.

3. Sewing system as claimed in claim 1 or 2,

a height sensor for detecting a height of the sewing object located at the sewing position in a direction of reciprocating movement of the sewing machine needle,

the control device starts the sewing by the sewing machine when the end of the seam of the sewing object folded back by the second folding device is determined to be located at the sewing position based on the detection result of the height sensor.

4. The sewing system of any of claims 1-3,

an end detection device which is provided with a gas supply device for injecting gas in a mode of extending the end of the sewing object folded by the second folding device and detects the end of the sewing object on the conveying device,

the control device finishes the sewing by the sewing machine when the control device judges that the whole circumference of the end part of the sewing object is sewn based on the detection result of the end part detection device.