JPH04112383U - Fabric edge guide device for sewing machine for bifold fabric - Google Patents

Abstract

(57) [Summary] [Purpose] For example, when folding a fabric such as a ribbed fabric in half and sewing it around the annular opening of a sweatshirt, etc., there is no need for additional processes such as ironing.
Moreover, the edges of both upper and lower parts of the folded fabric can be aligned with each other without reducing the sewing speed, and the sewing can be reliably and satisfactorily sewn. [Structure] On both sides of the front side of the needle drop section 2, there are first guides 10 which are curved in an almost inverted U-shape so as to come into contact with the folded part of the bi-folded fabric, and the upper and lower parts of the bi-folded fabric. A pair of upper and lower guide portions 11A, 1 curved into a substantially square shape so as to abut the edges of the portions, respectively.
1B, and a pair of upper and lower guide portions 11A, 11B of this second guide 11.
Between these guide parts 11A and 11B, the first guide 1
A bending protrusion 12 protruding toward the 0 side is provided, and the bending protrusion 12 and the second guide 11 are configured to be driven and moved in the distance direction relative to the first guide 10 via an air cylinder 16.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea uses an overlock sewing machine to create items such as sportswear and trays. Fold the ribbed fabric in half for the hem, cuffs, or neck area of sewn items such as clothes. Regarding the fabric edge guide device of sewing machines for sewing double-folded fabric, etc. It is something to do.

0002

[Conventional technology]

To sew bifold fabrics such as the above-mentioned ribbed fabrics to main sewing fabrics such as sweatshirts. Conventionally, a ruler as shown in Figure 4 is placed in front of the needle drop. It was configured to guide the feeding of the bi-folded fabric. This guessing ruler is two A fixed guide having a rising re-guide piece 30 at its free end, which the folded part of the folded fabric comes into contact with. 31 and a fixed guide facing the rising re-guide piece 30 so that the relative interval can be adjusted. A movable guide that is attached to 31 and that the edges of both the upper and lower sides of the bifold fabric come into contact with. These pair of guide pieces 30, 32 are arranged on the left and right, top and bottom, and front and back. Mounting plates 33, 34, 35 having long holes 33a, 34a, 35a along the It is configured so that its position can be freely adjusted in the left and right, up and down, and front and back directions through the The two guide pieces 30 and 32 of such a ruler are covered with two-folded cloth. Touch the folded part of the fabric and the edges of both upper and lower parts and point it toward the needle drop part. By transporting the folded fabric, the upper and lower edges of the folded fabric are aligned and It is used for sewing.

0003

[Problem that the idea aims to solve]

However, when using a conventional fabric edge guide device consisting of a ruler with the above configuration, assumes that the edges of the upper and lower sides of the folded in half are aligned when sewing starts. Also, judging from the shapes of both guide pieces 30 and 32, as the sewing progresses, the upper and lower fabric parts The parts tend to shift relatively easily in the width direction. In particular, the misalignment of the upper part of the bi-folded fabric It is clearly visible to the worker, but the misalignment of the lower part is difficult to see. Since the misalignment cannot be seen, there is a high possibility that sewing will continue without noticing the misalignment. , as a result, the double-folded fabric is not sewn properly to the main sewing fabric. The problem is that this leads to sewing defects such as cracking, resulting in a large number of defective sewn products. It was.

0004 In order to eliminate sewing defects such as unsewn stitches, reduce the sewing speed. , it is possible to proceed with sewing while aligning the edges several times during the sewing process, but this If this is the case, the efficiency of the sewing work will be poor and the productivity of sewn products will be extremely reduced, as well as the production time will be reduced. It requires skill to operate and is not practical. Furthermore, before starting sewing, iron the folded part of the bi-folded fabric. By forming a definite crease at the bent part, the top and bottom can be easily adjusted when sewing. Although it is thought to suppress the occurrence of misalignment between the two fabric parts, in this case, Requires a separate manual process of ironing, which reduces productivity and cost. So it's not desirable.

[0005] This idea was made in view of the above-mentioned circumstances, and it is not possible to use manual methods such as ironing. Double-folded fabric can be easily fabricated without requiring additional process work or reducing sewing speed. Make sure to align the edges of the upper and lower sides of the fabric to efficiently sew with a good finish. To provide a fabric edge guide device for a sewing machine for sewing bi-folded fabric that can be realized. With the goal.

[0006] In order to achieve the above object, the bifold fabric sewing according to the invention described in claim 1 The fabric edge guide device of the wearable sewing machine is used to guide the upper edge of the folded fabric and the lower edge of the fabric. Align the edges of the folded fabric and the main sewing fabric overlaid on it. A material edge guide device for a sewing machine that sews both materials while feeding them in the same direction. It is placed on one side of the front part of the fabric so that it comes into contact with the folded part of the bi-folded fabric. A first guide curved in an almost inverted U-shape, and facing the opening side of this first guide. and placed on the other side of the front part of the needle drop part, and the upper part of the bi-folded fabric. and an upper part curved into an approximately V-shape so as to abut the edges of the lower part, respectively. A second guide consisting of a lower pair of guide parts, and a pair of upper and lower guide parts of this second guide. a bending protrusion disposed between the guide parts and protruding toward the first guide side; Then, this bending protrusion and the second guide are integrated and attached to the first guide. and a drive mechanism that moves the camera in the far and near directions along a horizontal plane. It is something that

[0007] Further, a cloth edge guide of a sewing machine for sewing bi-folded cloth according to the invention described in claim 2. In addition to the above-mentioned configuration, the device also includes a fabric feeder to a position in front of the first and second guides. A guide roller for fabric feeding is arranged, and this guide roller for fabric feeding is located at the needle drop point. In the feed direction of bifold fabric and main sewing fabric and in the direction perpendicular to it The fabric feed direction can be adjusted by rotating around the axis that is both inclined to the This is what is happening.

[0008]

[Effect]

According to the invention described in claim 1, the second guide and the bending protrusion are connected to the first guide. Fold the fabric roughly in half by hand, keeping it spaced apart from the After setting it on the guide side, operate the drive mechanism to move it to the second guide and bend it. The lifting protrusion is moved together along the horizontal plane toward the first guide. This movement is If the tip of the above-mentioned bending protrusion goes inside the bending part of the first guide, A row movement followed immediately by a return movement over a distance equivalent to approximately half the total width of the fabric. Due to the above-mentioned outbound movement, it is set roughly in half as shown above. The fabric being folded is folded into a predetermined two-fold shape by the pushing force of the folding protrusion. At the same time as the folded fabric is bent, the folded part of the folded fabric is almost reversely bent. The inner surface of the bent part of the first guide, which is curved in a square shape, and the edges of both the upper and lower sides are almost The inner surface of the bent part of the pair of upper and lower guide parts in the second guide curved in a square shape. They are brought into contact with each other. After that, overlap the main sewing fabric on top of the two-fold fabric and The specified sewing is carried out while feeding the fabric in the same direction.At this time, the double-folded fabric Above the first and second guides on the bent portion and the edges of both upper and lower parts of This will ensure that the contact state with the lower guide part is maintained, and the folded fabric can be folded in half during sewing. Sewing problems such as unsewn stitches due to relative deviation of the upper and lower sides of the fabric in the width direction. The occurrence of defects can be prevented.

[0009] Further, according to the invention described in claim 2, the above-mentioned sewing operation of the bi-folded fabric When the guide roller is placed in front of the first and second guides, The degree of slippage of the fabric can be adjusted using the It is now possible to adjust it appropriately according to the characteristics such as friction coefficient and friction coefficient. Regardless of the characteristics of the fabric, ensure that the fabric is placed between the first and second guides above. The material is transported and guided to ensure the desired bifolding action and subsequent slippage prevention action. can be made. Furthermore, it is possible to simply rotate the guide roller around the inclined axis. With simple operations, the direction of fabric feeding can be finely adjusted.

0010

【Example】

An embodiment of this invention will be described below based on the drawings. FIG. 1 is a schematic perspective view showing the main parts of a sewing machine for sewing bi-folded fabric according to this invention. FIG. 2 is a plan view thereof. In the figure, 1 is the main body of the sewing machine, and the needle is on the left end. A throat plate 4 is provided with a drop portion 2, a feed dog 3, etc., and this throat plate A presser foot 5, a sewing needle 6, a cutter 22 for cutting off the edge of the cloth, and the like are provided above the cloth 4. Reference numeral 7 is a guide mounting base, which is fixed to the front side of the sewing machine main body 1, and this guide The fabric edge guide device 8 is mounted on the mounting base 7 by swinging around the vertical support shaft 9, as shown by the solid line in FIG. As shown in FIG. As shown in the imaginary line in FIG. A non-working position in which the sewing machine body 1 moves out of the way during plain stitching by retreating to the It is installed so that it can be switched freely.

[0011] The cloth edge guide device 8 is constructed as follows. That is, FIGS. 1 and 2 , 10 is a first guide, and this first guide 10 is located in front of the needle drop section 2. is placed on the left side of the folded fabric A, and touches the outer surface of the folded part A1 of the bi-folded fabric A. As shown in Fig. 3, the folded part A1 of the It is curved into an almost inverted U-shape, and is fixedly supported on the sewing machine main body 1 side. It is. 11 is a second guide, and this second guide 11 is located in front of the needle drop section 2. It is arranged to face the opening side of the first guide 10 on the right side of the Abut against the edges of the upper part A2 and lower part A3 of the folded fabric A, respectively, and As shown in Fig. 3, almost all of the It consists of a pair of upper and lower guide portions 11A and 11B that are curved into a letter shape.

0012 12 is a bending protrusion, and this bending protrusion 12 is placed above the second guide 11. It is arranged so as to be sandwiched between the lower pair of guide parts 11A and 11B, and its tip part is The guide portions 11A and 11B are projected toward the first guide 10, and A second guide is connected to the proximal end side of this bending protrusion 12 through an elongated hole 13 and a set screw 14. The guide 11 can be freely adjusted to move in the far and near direction as shown by arrow a with respect to the first guide 10. installed on. This movement adjustment in the direction of arrow a is determined by the width of the bi-folded fabric A. It is set in advance before sewing according to the sewing conditions. 15 is a support frame body, this support frame The support shaft 9 is attached to the guide mounting base 7 at the right end of the upper frame portion 15A of the body 15. The support frame 15 is pivotably mounted through the support frame 15, and the swing of the support frame 15 causes the above-mentioned The cloth edge guide device 8 can be freely switched between a working position and a non-working position.

[0013] Reference numeral 16 denotes an air cylinder, which is installed at the bottom of the upper frame portion 15A of the support frame 15 in the left and right direction. The movable piston rod of this air cylinder 16 is attached in an expandable and contractable state. The second guide 11 and the movable frame 17 fixed to the tip of the guide 16A are By fixedly supporting the projection piece 12, the expansion and contraction operation of the air cylinder 16 allows the above-mentioned The second guide 11 and the bending protrusion 12 are integrated and the first A drive mechanism is configured to move the guide 10 in the distance direction.

[0014] Reference numeral 18 denotes a fabric feeding guide roller, and this guide roller 18 is connected to the first and second guide rollers. 2. It is placed below the front side of the guides 10 and 11 to feed the bi-folded fabric A. It is a guide for the bi-folded fabric A and the main sewing fabric for the needle drop section 2. with respect to the feed direction (arrow x direction) and the direction perpendicular to it (arrow y direction). Formed at the left end of the lower frame portion 15B of the support frame body 15 via a shaft 19 that is inclined to both sides. The bearing part 20 is rotatably supported around the axis 19a of the bearing part 20. The fabric feeding direction is configured to be adjustable by rotation around the oblique axis 19a. There is. Note that 21 in the figure is a group of rollers that guide the feeding of the main sewing material.

[0015] Next, the operation of the above configuration will be explained. First, the air cylinder 16 is contracted, and the second guide 11 and the bending protrusion are 12 with respect to the first guide 10 as shown in FIG. The fabric A, such as a knitted fabric, is folded roughly in half by hand and placed on the first guide 10 side. set. In this state, the air cylinder 16 is extended and the second guide 11 and and the bending protrusion 12 is moved toward the first guide 10 along the horizontal plane. here During this movement, as shown in FIG. 3(b), the tip of the bending protrusion 12 will A forward movement that goes inside the bending part of the id 10, and immediately after that, the As shown in 3(c), the second guide 11 is placed at a location corresponding to approximately half of the total width of fabric A. It consists of a return movement such as stopping at a certain location, and along with the above movement, the Apply the pushing force of the folding protrusion 12 to the fabric A that has been folded in another half. The piece is then folded into a predetermined two-fold shape, and the piece is stopped by going backwards. At this point, the outside of the folded part A1 of the bi-folded fabric A that has been folded as described above is The surface is brought into contact with the inner surface of the bent portion of the first guide 10, and the upper and lower both sides A2 , A3 on the pair of upper and lower guide portions 11A. 11B's They are brought into contact with the inner surfaces of the bent portions, respectively, to provide a predetermined cloth edge guiding action.

[0016] Next, the main sewing fabric B is set to be transferred and guided by the roller group 21. With the edge of the folded fabric A overlapping it, start sewing using the sewing machine. By starting, the vicinity of both edges of the folded fabric A is sewn to the main sewing fabric B. A predetermined sewing process is performed, but at this time, the folded part A1 and the folded part A1 of the bifold fabric A are sewn together. and the edges of the upper and lower both sides A2 and A3 are respectively connected to the first guide 10 and the first guide 10. The upper and lower guide portions 11A and 11B of the second guide 11 are kept in contact with the inner surface of the bent portion. Therefore, during sewing, the top and bottom of the folded fabric A are Both sides A2 and A3 do not shift relative to each other in the width direction, and their edges are It is possible to sew onto the main sewing material B while keeping them aligned.

[0017] During the sewing work as described above, the bifold fabric A is attached to the first guide 10 and the second guide. 2. The guide roller 18 located below the front part of the guide 11 However, depending on the characteristics such as the material of the fabric A, the guide roller 1 8 around the tilted axis 19a to adjust the transfer guide direction. Therefore, regardless of the characteristics of the fabric A, the fabric A is guided through the first and second guides 10. , 11 to achieve the above-mentioned bi-folding action and slippage prevention action. It can be done reliably.

[0018] Then, just before the specified sewing is finished, stop the sewing machine. At the same time, the air cylinder 16 is contracted, and the second guide 11 and the bending After retracting the cutting piece 12 to the right as shown in Figure 3(a), sew it with a sewing machine. By restarting the manufacturing process and sewing the remaining unsewn parts, the second half of the rib knitted fabric, etc. The folded fabric A can be completely sewn to the main sewing fabric B.

[0019] In addition, according to the configuration of the above embodiment, when the bi-folded fabric A is not sewn, the supporting The second guide, which is the main part of the cloth edge guide device 8, is constructed by swinging the frame 15 around the support shaft 9. 11. Place the bending protrusion 12, guide roller 18, etc. on the outside of the front of the sewing machine body 1. By retracting the cloth edge guide device 8, the sewing machine can It is possible to perform ground stitching, etc.

[0020] Further, in the above embodiment, the first guide 10 is fixed, but A time point before the end of sewing, that is, a timing synchronized with the retraction of the second guide 11 to the right. timing, escape to the left or downwards, for example via a solenoid or air cylinder. It may be configured to be moved. Furthermore, this first guide 10 is attached to the fabric to be sewn. Depending on the material and width of base A, it can be made compatible with different sizes and curved shapes. It is desirable to do so.

[0021]

[Effect of the idea]

As described above, according to the invention of claim 1, folding of the bi-folded fabric to be sewn is possible. The edges of the bent part and both upper and lower parts are curved into an inverted and square shape. so that the transfer guide is brought into contact with the inner surfaces of the bent portions of the first and second guides, respectively. This structure prevents the upper and lower fabric portions from shifting relative to each other in the width direction during sewing. In other words, make sure to align both the top and bottom edges, and prevent the sewing from coming off. To reliably and properly sew onto a main sewing material without causing defects. Moreover, in order to align the edges, additional manual steps such as ironing are required in advance. There is no need to perform sewing or reduce the sewing speed, and it is possible to save sewn products with a good finish. This has the effect of being able to be obtained efficiently and with good productivity.

[0022] Further, according to the invention of claim 2, when sewing the bi-folded fabric as described above, The feeding direction of the fabric to be folded in half is adjusted appropriately according to the characteristics of the fabric. Therefore, regardless of the fabric properties, the top and bottom of the bifold fabric can be The anti-slip effect on both sides can be reliably exerted.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing the configuration of the main parts of a sewing machine for sewing bi-folded fabric according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a schematic cross-sectional view for explaining the operation of main parts.

FIG. 4 is a perspective view of a ruler that is a conventional fabric guiding device.

[Explanation of symbols]

1 Sewing machine body 2 Needle drop section 8 Fabric edge guide device 10 First guide 11 Second guide part 11A, 11B Guide part 12 Bending piece 16 Air cylinder (drive mechanism) 18 Guide roller for fabric feeding 19a Tilt axis

Claims (2)

[Scope of utility model registration request] Claim 1: Align the edge of the upper part of the folded fabric with the edge of the lower part, and feed both the folded fabric and the main sewing fabric overlaid on it in the same direction. A fabric edge guide device of a sewing machine for sewing, which is arranged on one side of the front side of the needle drop section, and has a first section curved in an approximately inverted U-shape so as to come into contact with the folded section of the bifolded fabric. a guide, which is disposed on the other side in front of the needle drop portion opposite to the opening side of the first guide, and is substantially in contact with the edges of the upper and lower portions of the bi-folded fabric, respectively. A second guide consisting of a pair of upper and lower guide parts curved into a square shape, and a bending protrusion that is arranged between the pair of upper and lower guide parts of the second guide and projects from these guide parts to the first guide side. A sewing machine for sewing bi-folded fabric, characterized in that the sewing machine is equipped with a drive mechanism that integrally moves the bending projecting piece and the second guide in a distance direction along a horizontal plane with respect to the first guide. material edge guide device. 2. A fabric feeding guide roller is disposed in front of the first and second guides, and the fabric feeding guide roller is arranged in a direction in which the bifold fabric and the main sewing fabric are fed with respect to the needle drop area. 2. The fabric edge guide device for a sewing machine for sewing bi-folded fabric according to claim 1, wherein the fabric feed direction can be adjusted by rotation around an axis that is both inclined with respect to a direction perpendicular thereto.