CN110130005B

CN110130005B - Sewing device

Info

Publication number: CN110130005B
Application number: CN201910533628.0A
Authority: CN
Inventors: 后藤秀隆
Original assignee: Sojitz Corp
Current assignee: Sojitz Corp
Priority date: 2018-06-26
Filing date: 2019-06-19
Publication date: 2020-05-08
Anticipated expiration: 2039-06-19
Also published as: JP6423567B1; CN110130005A; JP2020000387A; WO2020003982A1

Abstract

The invention provides a sewing device which does not need manual sewing and supply of materials block by block in a three-fold edge seam. The sewing device comprises: a needle clip (64) capable of gripping the material (110) stored in the fabric box (52) piece by piece; a moving table (15) for receiving the material (110) held by the needle clip (64); a fixed table (17); a first conveying unit (18) that performs three-fold folding of one edge (111) of the material (110) placed at a second placement position (17b) of the fixing table (17); a first platen 21 for conveying the material 110 placed at the first placement position 17a of the fixing table 17 to the second placement position 17 b; a second platen 22 for conveying the material placed on the moving table 15 to a first placing position 17a of the fixed table 17; and a sewing machine (13) for sewing one edge (111) of the material (110) that has been three-folded by the first conveying section (18).

Description

Sewing device

Technical Field

The present invention relates to a sewing device for automating a triple-folding hem seam at one edge of a material of a back pocket of jeans.

Background

Conventionally, pants made by sewing denim fabric are called jeans and widely distributed. Usually, a back pocket of material other than jean fabric is sewn to the jeans. In this material, one edge portion is three-folded and sewn in advance, and then the material is sewn to the main body of jeans.

Fig. 1 is a view illustrating a triple-fold hem seam of a back pocket of jeans. As shown in fig. 1(a), the rear pocket 101 of the jeans 100 is sewn with another material having an upper portion with one edge portion thereof triple-seamed, like the main portion of the rear side of the jeans 100. The material is sewn as follows: in the material 110 having the denim fabric having a substantially rear pocket shape as shown in fig. 1(b), one edge 111 is three-folded toward the reverse side as in the cross section shown in fig. 1(c), and a three-folded portion 112 is sewn with a sewing machine as in the front side shown in fig. 1(d) and the reverse side shown in fig. 1 (e).

Such a triple-hem seam of a material for a back pocket of jeans is sewn by a sewing worker manually using a sewing machine to which a hemming machine for winding one edge portion of the material is attached. In addition, as disclosed in patent document 1, there is also provided a technique of: the cloth feeding mechanism is used for carrying out three-fold folding and conveying on the material, and the sewing machine is used for sewing the three-fold edge part.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2002-35455

Disclosure of Invention

However, since a sewing worker performs triple-folding edge sewing on one edge portion of a material using a sewing machine equipped with an overlock machine, a certain technique is required for the sewing worker, and the quality of a product obtained by the triple-folding edge sewing is not stable. In addition, since the sewing worker performs the triple-fold edge sewing by manual work, the amount of sewing that can be performed is limited. On the other hand, in the apparatus for performing the triple-hem seam by feeding the material to the sewing machine by the cloth feeding portion, the material needs to be supplied to the cloth feeding portion piece by piece, and a person for supplying the material needs to be secured.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a sewing device for performing a triple-fold hem seam on one edge portion of a material fabric, which does not require a sewing operation by a sewing worker or an operation of supplying the material piece by piece.

In order to solve the above problem, the present invention provides a sewing device for performing a triple-fold seam on one edge of a material fabric, including: a gantry having a top plate; a surface material box which is installed on the side part of the rack, has an opening at the upper part and is used for receiving materials in a stacking way; a needle clamp which is arranged above the flour bin in a lifting way and can hold materials stored in the flour bin piece by piece; a moving table which can move along a substantially horizontal direction between a storage position on the rack and an expansion position above the surface box, can receive the material held by the needle clamp at the expansion position, and is placed on the upper surface; a fixed table which is adjacent to the mobile table at the storage position on the rack and has a first loading position for loading the first material and a second loading position for loading the second material on the upper surface; a first conveying unit that is adjacent to the fixing table on the table frame, conveys the material placed at the second placement position of the fixing table along the upper surface of the top plate, and performs three-fold folding on one edge of the material; a first platen that conveys the material placed at the first placement position of the fixed table to the second placement position; a second platen that conveys the material placed on the movable stage located at the storage position to a first placement position on the fixed stage; and a sewing machine for sewing one edge of the material which is subjected to the three-fold folding by the first conveying part.

The needle clip may grip and release the material piece by moving the needle in and out from the lower surface. The fabric box may be provided with a support plate that supports the stacked material in a vertically movable manner, and the support plate may raise the stacked fabric so that the top portion thereof reaches a predetermined height when the needle holder grips the material stored in the fabric box. Alternatively, the fabric case may be detachable. The moving stage may be located at the storage position when the needle holder is lowered to hold the material, and may be located at the deployment position when the needle holder receives the material released from the needle holder and places the material on the upper surface.

The first platen and the second platen may be supported by a common support member that is movable along a shaft extending in a substantially horizontal direction so as to be independently movable up and down. The first platen may have a thickness sensor for measuring the thickness of the material when the material placed on the upper surface of the movable stage at the storage position is pressed. The present invention may further include: a reference plate which is connected with one edge part of the material loaded at the second loading position of the fixed table and provides a reference position; and a material pushing claw for pushing the material placed at the second placing position toward the reference plate so as to ensure that one edge portion is in contact with the reference plate.

Effects of the invention

According to the present invention, the sewing operation by the sewing worker and the operation of supplying the material piece by piece are not required, and the sewing worker and the person for supplying the material are not required. In addition, since the three-fold edge seam can be performed without manual work, the quality of the three-fold edge seam is stable, and the amount of sewing can be increased.

Drawings

Fig. 1 is a view illustrating a triple-fold hem seam of a back pocket of jeans.

Fig. 2 is a front view of the sewing device of the present embodiment.

Fig. 3 is a plan view of the sewing device of the present embodiment.

Fig. 4 is a right side view of the sewing device of the present embodiment.

Fig. 5 is a flowchart for explaining a series of operations of the sewing apparatus according to the present embodiment.

Fig. 6 is a flowchart illustrating a series of operations of the material supplying unit.

Fig. 7 is a rear view of a main part for explaining the operation of the material supplying unit.

Fig. 8 is a flowchart illustrating a series of operations of the three-fold seam portion.

Fig. 9 is a plan view of a main part for explaining the operation of the moving table and the fixed table of the three-fold seam portion.

Fig. 10 is a plan view of a main part of a first presser plate and a second presser plate showing a three-fold seam portion.

In the figure:

10-three-fold hem seam, 11-bed, 12-top board, 13-sewing machine, 15-moving table, 17-fixing table, 18-first conveying section, 19-second conveying section, 21-first presser, 22-second presser, 50-material supply section, 52-fabric box, 64-needle clamp, 90-control section, 110-material, 111-an edge.

Detailed Description

Hereinafter, the sewing device according to the present embodiment will be described in detail with reference to the drawings. The sewing device of the present embodiment is assumed to perform three-fold hemming on one edge portion of a material of a back pocket of jeans, which are jeans of jeans fabric, and automate a process from a step of picking up the material of the material to a step of performing the three-fold hemming. The present embodiment is not limited to this, and can be applied to a triple-fold seam at one edge of a fabric of a material other than jean fabric and a rear pocket of pants.

Fig. 2 is a front view of the sewing device of the present embodiment. The sewing device of the embodiment comprises: a three-folding edge seam part 10 for performing three-folding edge seam on the material; and a material supply unit 50 which is provided adjacent to the right side of the triple-folding seam 10 and supplies the material to the triple-folding seam 10 piece by piece.

In the triple-fold seam portion 10, a top plate 12 having an upper surface extending in a substantially horizontal direction is supported at a predetermined height by a stand 11. The upper surface of the top panel 12 is formed smoothly so that the material 110 can slide, and a sewing machine 13 for triple-folding seam is provided at a predetermined position on the upper surface of the top panel 12. An opening 12a is formed at one end of the top plate 12, and a container, not shown, for receiving the material 110 subjected to the triple-fold hemming is provided immediately below the opening 12 a.

Fig. 3 is a plan view of the sewing device of the present embodiment. The stage 11 is provided with a moving table 15, and the moving table 15 is driven by a driver 16, moves in a substantially horizontal direction between a storage position 15a on the stage 11 and a deployed position 15b projecting into the material supply unit 50, and can receive the material 110 piece by piece from the material supply unit 50 and place the material on the upper surface. The driver 16 for driving the moving stage 15 may be a pneumatic cylinder. As are the other drivers.

The gantry 11 is provided with a fixed table 17, and the fixed table 17 is adjacent to the moving table 15, has a first placement position 17a where the first material 110 can be placed and a second placement position 17b where the second material 110 can be placed, and conveys the material 110 from the moving table 15 to the first placement position 17 a. The upper surfaces of the movable stage 15 and the fixed stage 17 have substantially the same height as the upper surface of the top plate 12, and may extend in a substantially horizontal direction or may be formed smoothly so that the material 110 can slide.

A first feeding unit 18 is provided on the upper surface of the top plate 12 so as to connect the fixing table 17 and the sewing machine 13, and the first feeding unit 18 feeds the material 110 from the second placement position 17b of the fixing table 17 to the sewing machine 13 and performs three-fold folding of one edge 111 of the material 110. A band member, not shown, which is conveyed to slide the material 110 on the top plate 12 and a hemming machine, not shown, which hems one edge portion 111 of the material 110 conveyed to the sewing machine 13 and performs three-fold hemming are provided below the first conveying portion 18.

Further, a second conveying unit 19 is provided on the upper surface of the top plate 12 so as to connect the sewing machine 13 and the opening 12a of the top plate 12, and the second conveying unit 19 causes the material 110 triple-seamed by the sewing machine 13 to fall from the opening 12a to a container, not shown. A belt member, not shown, is provided below the second conveying unit 19 so as to convey the material 110 on the top plate 12 in a sliding manner.

The triple-folding seam 10 is provided with a first presser 21 and a second presser 22, the first presser 21 holds the material 110 placed on the moving stage 15 positioned at the storage position 15a in a pressed state, slides on the upper surfaces of the moving stage 15 and the fixed stage 17, and conveys the material to the first placement position 17a of the fixed stage 17, and the second presser 22 holds the material 110 placed on the first placement position 17a of the fixed stage 17 in a pressed state, slides on the upper surface of the fixed stage 17, and conveys the material to the second placement position 17 b. The first platen 21 and the second platen 22 are driven by a first actuator 23 and a second actuator 24, respectively, and are supported by a common support member 25 so as to be movable in the up-down direction. The support member 25 is driven by an actuator 26, and is supported on the front surface of a support plate 28 extending in the substantially vertical direction so as to be movable along a substantially horizontal axis extending in a direction connecting the movable table 15 and the fixed table 17 located at the storage position 15 a. The support plate 28 is attached to the stage 11 via a support 29 above the fixed table 17 and the movable table 15 so as to be spaced apart from the upper surfaces of the fixed table 17 and the movable table 15 by a predetermined gap.

The first platen 21 is provided with a thickness sensor 31, and the thickness sensor 31 is used to measure the thickness of the material 110 when the material 110 placed on the moving stage 15 located at the storage position 15a is pressed. A reference plate 33 for positioning one edge 111 of the material 110 is provided at one end of the first placement position 17a of the fixed base 17. Further, a pressing claw 35 is provided, and the pressing claw 35 is opposed to the reference plate 33 with the first placement position 17a interposed therebetween, is driven by the actuator 34, and presses the material 110 toward the reference plate 33 so that the one edge 111 of the material 110 is in contact with the reference surface 33a of the reference plate 33.

Fig. 4 is a right side view of the sewing device of the present embodiment. The material supply portion 50 is adjacently disposed on the right side of the three-fold seam portion 10, and is supported by a frame 51 of the stand 11 attached to the three-fold seam portion 10. A material supply unit 50 is provided with a material box 52 adjacent to the right side of the gantry 11, the material box being capable of stacking and storing a plurality of materials 110. The surface box 52 has an opening 52a on the upper side, and the stored material 110 is supported by a base plate 53 that can be raised and lowered and driven by a motor 55 via an arm 54. The noodle box 52 can be detached. Replenishment of material 110 is performed by changing the head box 52.

In the material supplying section 50, a vertically movable lift table 61 is provided directly above the material tank 52, and a set of needle grippers 64 for gripping and picking up the material 110 stored in the material tank 52 is provided below the lift table 61. The lift table 61 is supported by a lift table support 62 attached to the frame 51 so as to be drivable in the lifting direction. The needle holder 64 can grip and release the material 110 by moving the needle 64a in and out of the lower surface in contact with the material 110.

The control portion 90 is provided adjacent to the triple-folding hem portion 10 and a part of the back surface side of the material supply portion 50. The control unit 90 is provided with a control device for controlling a series of operations of the triple-folding hem seam 10 and the material supply unit 50 of the sewing device. The control device may also perform sequence control.

Further, the material supply unit 50 of the present embodiment includes one deck hopper 52, but the number of the fabric tanks is not limited to one, and two fabric tanks may be provided. When the two-deck hopper is provided, the material can be replenished to the hopper in the standby state by setting one hopper in the operating state for supplying the material 110 and the other hopper in the standby state. The material 110 can be replenished by switching the fabric box between the operating state and the standby state, and therefore, the stop time of the apparatus can be reduced and the operating efficiency can be improved.

Further, the material supplying unit 50 of the present embodiment uses the needle holder 64 for gripping and picking up the material 110 stored in the material box 52, but may use another type of holder instead. For example, a vacuum chuck that uses a vacuum to suck the material 110 may be used. The type of the jig is preferably selected in consideration of cost, based on the material 110 such as the fabric.

Fig. 5 is a flowchart for explaining a series of operations of the sewing apparatus according to the present embodiment. In the sewing apparatus, the step of supplying the material 110 in step S11 is performed by the material supply unit 50 of the sewing apparatus. In step S11, the material 110 is supplied from the material supply unit 50 to the three-fold seam 10 piece by piece. Next, in step S11, the triple-folding seam of step S12 is executed by the triple-folding seam portion 10. In step S12, the material 110 is triple-folded at the triple-folded seam portion 10. A series of operations of the sewing apparatus can be controlled by the control section 90.

Fig. 6 is a flowchart illustrating a series of operations of the material supplying unit 50. Fig. 7 is a rear view of a main part for explaining the operation of the material supplying section 50. The series of operations shown in the flowchart of fig. 6 corresponds to the step of supplying the material 110 in step S11 in the flowchart of fig. 5. In order to perform the series of operations, a cloth containing the material 110 is set in the material supply portion 50 such that the surface box 52 is stacked. The cloth of material 110 is made of jean fabric and has approximately the shape of the back pocket of jeans.

When the material 110 is not present in the fabric case 52 and the number of pieces of the material 110 stored in the fabric case 52 is less than a predetermined number, the material 110 is appropriately replenished to the fabric case 52. When replenishing the material 110 to the fabric tank 52, the bottom plate 53 of the fabric tank 52 driven by the motor 55 via the arm 54 may descend to the lowermost portion. In the present embodiment, the fabric case 52 is detachable. Therefore, the material 110 can be replenished by detaching the lower surface box 52 and attaching another surface box 52 in which the material 110 is previously stored. In this way, the material 110 can be replenished by replacement of the surface bin 52. Therefore, the operation of the sewing machine does not need to be stopped for a long time, and the burden of the work of replenishing the material 110 is small.

In step S21, the needle holder 64 holds and lifts the material 110 piece by piece. The needle holder 64 provided on the lower side of the lift table 61 is driven by the lift table support 62 together with the lift table 61, and is lowered until the lower surface of the needle holder 64 contacting the material 110 reaches a predetermined reference height having substantially the same height as the upper surface of the table 11. On the other hand, the material 110 stored in the material box 52 is driven via the bottom plate 53 and the arm 54, and rises until the top of the material 110 exceeds the opening 52a of the material box 52 and reaches the reference height.

Here, the needle holder 64 may be operated in synchronization such that the time when the lower surface of the needle holder 64 reaches the reference height is substantially equal to the time when the material 110 stored in the material box 52 rises and the top of the material 110 reaches the reference height. The needle holder 64 having a height near the reference height can be adjusted in height by an unillustrated actuator provided in the lift table 61.

As shown in fig. 7(a), when the lower surface of the needle holder 64 and the top of the material 110 reach the reference height of the surface bin 52, respectively, the lower surface of the needle holder 64 and the top of the material 110 will meet. When the lower surface of the needle holder 64 comes into contact with the top of the material 110, the needle holder 64 inserts the needle 64a into the piece of material 110 positioned on the top of the material by projecting the needle 64a from the lower surface, and holds the piece of material 110.

When the needle holder 64 holds a piece of the material 110, the needle holder 64 rises together with the held piece of the material 110, picks up the material 110, and lifts up to reach a predetermined height. The predetermined height may be a height that ensures a predetermined gap between the piece of material 110 held by the needle holder 64 and the upper surface of the moving table 15 located at the extended position 15b protruding from the triple-folding seam portion 10 into the material supply portion 50.

On the other hand, the remaining material 110 other than the top piece of material 110 may start to descend in accordance with the time when the needle holder 64 starts to grip the top piece of material 110 and start to ascend so as to be rapidly separated from the top piece of material 110 gripped by the needle holder 64. The remaining material 110 may be stationary when the needle holder 64 grips the top piece of material 110 and rises.

In step S23, the movable stage 15 is moved above the fabric box 52. When the needle holder 64 grips a piece of material 110 and rises to a predetermined height, the moving table 15 located at the storage position 15a on the table 11 of the three-fold seam portion 10 is driven by the actuator 16 and moves so as to project from the storage position 15a on the table 11 to the deployment position 15b directly above the fabric box 52 in the material supply portion 50. As shown in fig. 7(b), a piece of material 110 held by the needle holder 64 is provided directly above the upper surface of the movable stage 15 located at the extended position 15 b.

In step S24, the material 110 is placed on the mobile station 15. When the moving stage 15 reaches the deployed position 15b, the needle holder 64 retracts the needle 64a protruding on the lower surface, releasing the gripped piece of material 110. The piece of material 110 released from the needle chuck 64 drops onto the upper surface of the movable table 15 located directly below the needle chuck 64 and is placed thereon. When the gap between the movable table 15 and the piece of material 110 held by the needle holder 64 is large, the needle holder 64 may be lowered to reduce the gap between the piece of material 110 held by the needle holder 64 and the upper surface of the movable table 15, and then the piece of material 110 may be released.

In step S24, when a single piece of material 110 is placed on the upper surface of the moving table 15, the moving table 15 driven by the driver 16 places the single piece of material 110 on the upper surface and retracts from the extended position 15b protruding directly above the fabric case 52 of the material supply portion 50 to the storage position 15a on the stand 11 of the triple-folded seam portion 10.

Through a series of steps from step S21 to step S24, a piece of material 110 can be taken out from the material 110 stacked in the surface box 52 of the material supply unit 50 and supplied to the triple-folding hem seam 10. Since the operation of taking out one piece of the material 110 from the stacked material 110 is automated, it is not necessary to secure a person for supplying the material to the triple-folded hem seam 10 piece by piece. In the present embodiment, the material 110 can be reliably gripped piece by inserting the needle 64a into the material 110 from the lower surface of the needle holder 64.

In the present embodiment, in the step of supplying the material 110, the movement of the material 110 in the vertical direction is performed by the needle holder 64, and the movement of the material 110 in the horizontal direction is performed by the moving table 15. The movement in the raising and lowering direction of the needle holder 64 and the movement in the horizontal direction of the movable table 15 are completely separated. Further, the return time of the moving stage 15 from the deployed position 15b to the storage position 15a can be made to overlap with the time of conveying the material 110 placed on the moving stage 15. By combining the needle holder 64 and the mobile station 15, the return time can be shortened, and the cycle time can be shortened.

Fig. 8 is a flowchart illustrating a series of operations of the three-fold seam portion 10. Fig. 9 is a plan view of a main part for explaining the operation of the moving table 15 and the fixed table 17 of the three-fold seam portion 10. Fig. 10 is a plan view of a main part showing the first presser plate 21 and the second presser plate 22 of the three-fold seam portion 10. The series of operations shown in fig. 8 corresponds to the step of triple-folding in step S12 in the flowchart of fig. 5. To start the series of operations, it is set that a piece of the material 110 is supplied from the material supply unit 50 to the triple-folded hem seam 10 in step S11 of the flowchart of fig. 5.

In step S31, the number of pieces of the material 110 supplied from the material supply unit 50 is checked. The confirmation of the number of pieces of material 110 utilizes the thickness sensor 31. If it can be confirmed that the number of pieces of the material 110 supplied from the material supply unit 50 is one, the process proceeds to the subsequent process, and if the number of pieces of the material 110 supplied from the material supply unit 50 is not one, for example, if the material 110 is not present, two pieces are supplied at a time, an error is displayed as NG, and a series of processes is interrupted.

As shown in fig. 9(a), a piece of material 110 picked up by the needle holder 64 of the material supply portion 50 is placed on the upper surface of the moving stage 15 located at the extended position 15b protruding from the stage 11. The moving table 15 located at the development position 15b on which the material 110 is placed on the upper surface is driven by the driver 16 to be retracted to the storage position 15a on the stage 11 depicted by the imaginary line. The first material 110 is placed on the fixed table 17 adjacent to the movable table 15 located at the storage position 15a at the first placement position 17a on the upper surface, and the second material 110 is placed at the second placement position 17 b.

When the moving table 15 on which the material 110 is placed on the upper surface reaches the storage position 15a, as shown in fig. 10, the first presser plate 21 located immediately above the upper surface of the moving table 15 located at the storage position 15a with a predetermined gap therebetween is driven by the first actuator 23 to be lowered, and the material 110 placed on the upper surface of the moving table 15 located at the storage position 15a is pressed and held by the lower surface. Further, the second presser plate 22, which is supported by the common support member 25 together with the first presser plate 21 and is positioned directly above the first placement position 17a on the upper surface of the fixed table 17 with a predetermined gap, is driven to descend by the second actuator 24, and presses and holds the material 110 placed at the first placement position on the upper surface of the fixed table 17 with the lower surface.

Here, the operation of pressing the material 110 by the first presser plate 21 and the second presser plate 22 may be performed independently and individually, or may be performed at the same time. The first presser plate 21 and the second presser plate 22 may be processed so that the friction of the lower surfaces is increased and the lower surfaces may be formed with irregularities in order to press the holding member 110. The height of the movable table 15 and the fixed table 17 located at the storage position 15a can be adjusted by a not-shown actuator.

The first platen 21 presses the material 110 placed on the upper surface of the movable stage 15 located at the storage position 15a with the lower surface, and the thickness of the material 110 placed on the movable stage 15 located at the storage position 15a is measured by the thickness sensor 31 attached to the first platen 21. When the measured thickness is within the predetermined range, it is determined that the material 110 is present, and when the measured thickness is not within the predetermined range, it is determined that the material 110 is not present or two or more materials 110 are placed. In the present embodiment, the thickness of the material 110 is measured by the thickness sensor 31, whereby the presence or absence of the material 110 and whether or not the material 110 is truly one piece can be checked. Further, by simultaneously performing the operation of pressing the holding member 110 by the first presser plate 21 and the measurement of the thickness sensor 31, the cycle time can be shortened.

In step S32, the material 110 is positioned so as to form three folds in the one edge portion 111 of the material 110. The first conveying section 18 adjacent to the second placing position 17b on the upper surface of the fixed table 17 conveys the material 110 placed at the second placing position 17b toward the sewing machine 13. The second platen 22 presses and holds the material 110 placed at the first placement position 17a on the upper surface of the fixed base 17 with the lower surface, and slides the material to the second placement position 17 b. The first presser plate 21 presses and holds the material 110 placed on the upper surface of the movable stage 15 located at the storage position 15a with the lower surface, and slides to the first placement position 17 a. Here, the first platen 21 and the second platen 22 are supported by a common support member 25, and the movement of the material 110 based on the first platen 21 and the second platen 22 can be synchronized. The movement of the material 110 by the first platen 21 and the second platen 22 may be synchronized with the movement of the material 110 by the first conveying unit 18.

When the holding member 110 is pressed by the lower surface of the first platen 21 and the second platen 22, respectively, and slid to the first placement position 17a and the second placement position 17b on the upper surface of the fixed table 17, the first platen and the second platen are driven by the drivers 26 and 27, respectively, and are raised so as to form a predetermined gap between the upper surface and the lower surface of the fixed table 17. Then, the first presser plate 21 is driven by the driver 16 via the common support member 25, and is returned to a position directly above the storage position of the movable table 15, and the second presser plate 22 is returned to a position directly above the first placement position 17a of the fixed table 17.

As shown in fig. 9(b), a reference plate 33 is provided at one end of the fixed base 17 facing the one edge 111 of the material 110 at the first placement position 17a, and a reference surface 33a for positioning is formed at the reference plate 33 facing the one edge 111 of the material. A pressing claw 35 that is driven by the driver 34 and presses the material 110 against the reference plate 33 is provided at the other end portion of the fixed base 17 on the side facing the reference plate 33 with the first placement position 17a interposed therebetween. The material pushed by the pushing claw 35 can secure the reference position of the one edge portion 111 by contacting the one edge portion 111 on the side where the triple-folding seam is performed with the reference surface 33a of the reference plate 33.

In step S33, the material 110 is triple-folded. In step S32, the material 110 placed and positioned at the first placement position 17a of the stationary table 17 is conveyed to the second placement position 17b by the second platen 22 and placed, similarly to step S31. The material 110 placed at the second placing position 17b is conveyed toward the sewing machine 13 by the first conveying portion 18 provided adjacent to the second placing position 17 b. The material 110 placed at the second placement position 17b is conveyed by sliding a belt member, not shown, provided below the first conveying unit 18 on the upper surface of the top plate 12, and one edge 111 of the material 110 is gradually triple-folded with the progress of the material 110 by a hemming machine, not shown, provided below the first conveying unit 18.

In step S34, the material 110 is subjected to triple-fold hemming. In step S33, the material 110 having the one edge portion 111 triple-folded by the first conveying unit 18 is supplied from the first conveying unit 18 to the sewing machine 13. The sewing machine 13 sews a triple-folded edge portion 112 of the triple-folded edge material 110 to perform a triple-folded edge seam. The three-fold edge seam can be performed by a lock seam or a flat seam. In addition, sewing may be performed using one needle, or may be performed using a plurality of needles in parallel. The material 110 subjected to the triple-hemming in the sewing machine 13 is conveyed toward the opening 12a of the top panel 12 by the second conveying portion 19. The material 110 subjected to the triple-fold hemming is conveyed by a belt member, not shown, provided below the second conveying portion 19 sliding on the upper surface of the top plate 12, falls through the opening 12a of the top plate 12, and is received by a container, not shown.

Through a series of steps from step S31 to step S34, the one edge portion 111 of the material 110 supplied one by one from the material supply unit 50 can be triple-hemmed. The three-fold edge seam of the material 110 is automatically performed without manual work, so that the quality of the three-fold edge seam is stable, and the sewing amount can be increased. Further, by checking the number of pieces of the material 110 in step S31 and performing positioning in step S32, it is possible to prevent a failure due to the number of pieces of the material 110 and to ensure the accuracy of the triple-fold seam.

In the present embodiment, the supply of the material 110 from the material supply unit 50 to the triple-folded seam portion 10 in step S11 shown in the flowchart of fig. 5, the confirmation of the number of blocks in step S31 in the flowchart shown in fig. 8 corresponding to the triple-folded seam of step S12, the positioning in step S32, the triple-folding of step S33, and the sewing in step S34 are performed in synchronization with each other at predetermined times, whereby the operation of the triple-folded seam portion 10 can be performed in parallel without interruption. The time may be set based on the speed at which the material 110 is supplied from the material supply unit 50 to the triple-hem seam 10, the speed at which the first conveying unit 18 performs triple-hemming on the material 110, and/or the speed at which the sewing machine 13 sews the material 110.

Availability in production

The invention can be used for carrying out three-fold edge sewing on the cloth of the material of the back pocket of the jeans.

Claims

1. A sewing device for performing three-fold edge sewing on an edge of a cloth of a material, comprising:

a gantry having a top plate;

a surface material box which is installed on the side part of the rack, has an opening at the upper part and is used for receiving materials in a stacking way;

a needle clamp which is arranged above the surface material box in a lifting way and can hold materials stored in the surface material box one by one;

a moving table which can move in a substantially horizontal direction between a storage position on the table and an extended position above the surface box, and which can receive the material held by the needle holder at the extended position and place the material on an upper surface;

a fixed table which is adjacent to the mobile table located at the storage position on the table frame and has a first placement position for placing a first material and a second placement position for placing a second material on an upper surface;

a first conveying unit that is adjacent to the fixing table on the stage, conveys the material placed at the second placement position of the fixing table along the upper surface of the top plate, and performs three-fold folding of one edge of the material;

a first platen that conveys the material placed at the first placement position of the fixed table to a second placement position;

a second platen that conveys the material placed on the moving table located at the storage position to a first placement position on the fixed table; and

and a sewing machine for sewing one edge of the material that is triple-folded by the first conveying section.

2. The sewing apparatus of claim 1,

the needle clip grips and releases the material piece by moving the needle in and out from the lower surface.

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

the fabric magazine is provided with a support plate that can lift and support the stacked material, and the support plate raises the stacked fabric so that the top of the stacked fabric reaches a predetermined height when the needle gripper grips the material stored in the fabric magazine.

4. Sewing device as claimed in claim 1 or 2,

the surface material box can be detached.

5. Sewing device as claimed in claim 1 or 2,

the movable stage is located at the storage position when the needle holder is lowered to hold the material, and located at the deployment position when the needle holder receives the material released from the needle holder and is placed on the upper surface.

6. Sewing device as claimed in claim 1 or 2,

the first platen and the second platen are supported to be independently movable up and down by a common support member movable along a shaft extending in a substantially horizontal direction.

7. The sewing apparatus of claim 6,

the first platen has a thickness sensor for measuring the thickness of the material when the material placed on the upper surface of the movable table at the storage position is pressed.

8. Sewing device as claimed in claim 1 or 2,

further comprising:

a reference plate which is in contact with one edge of the material placed at the second placement position of the fixed table and provides a reference position; and

and a pressing claw which presses the material placed at the second placement position toward the reference plate, thereby ensuring that one edge portion is in contact with the reference plate.