KR102479110B1 - Sewing machine with seam guides that form different types at the top and bottom - Google Patents

Abstract

In this invention, a large first fabric is placed on the upper side to form a wide seam allowance, and a small second fabric is placed on the lower side to form a narrow seam allowance, so that the first fabric covers the second fabric and at the same time The second fabric seam allowance forming guide 252 has a needle insertion hole 233 on the front side so that it can be easily and accurately guided and sewn by pressing up and down and pushing up while wrapping the side of the second fabric. A second fabric side upper surface pressing portion 252a for guiding while pressing the upper side surface of the moving second fabric 20 by forming the end of one side bent downward while covering the upper surface of the side portion so as not to be covered, and the above Guide to form the second seam allowance 21 while covering the side of the moving second fabric 20 by extending and forming so that the needle insertion hole 233 is not covered while going from the upper side pressing part 252a of the second fabric side to the rear side The second fabric 20 moves by forming the toothed member 230 at a higher level than the toothed row 231 on the rear side of the toothed member 230. The upper and lower widths characterized in that the side of the second fabric side is pressed and pushed up from the upper and lower sides together with the upper and lower pressing parts 252a to firmly hold the upper and lower parts while guiding and sewing to form the second seam allowance 21. A sewing machine 200 having a guide for forming a seam allowance differently is provided.

Description

Sewing machine with guides forming upper and lower seam allowances {Sewing machine with seam guides that form different types at the top and bottom}

The present invention relates to a sewing machine having a guide for forming disparate upper and lower seam allowances, and more particularly, to a guide that can easily and accurately form a fabric having a step difference due to a difference in seam allowance width between the upper and lower parts. It relates to a sewing machine provided.

Generally, a sewing machine includes a needle plate, a toothed member, and a presser foot.

Here, the needle plate is installed on the table and transfers the fabric, which is a sewing material such as a cover for a car seat or a headrest provided for safety and comfort placed on the table, from the front side to the rear side. A sawtooth groove is opened so as to protrude and move.

The toothed member is installed to reciprocate back and forth inside the toothed groove, and a plurality of toothed rows are formed on the upper surface back and forth, and a needle insertion hole is formed at a predetermined position in the middle.

In addition, in the presser foot, two pressing pieces support the fabric on both sides with a groove that opens forward from the upper part of the needle plate and the sawtooth member, and a needle guide hole is formed on the pressing piece facing the needle insertion hole. do.

From this, the fabric to be sewn with the sewing machine is sewn while forming a sewing line through a process in which the needle with the upper thread is lifted and intersected with the lower thread at the upper part of the needle plate and the lower part of the presser foot, and the sewn fabric The silver is transferred in the traveling direction using the toothed member and the presser foot.

In addition, the table is provided with a guide for maintaining a seam allowance of the same width by contacting the side surface of the seam allowance of the fabric when sewing while moving the fabric, so that the fabric to be sewn to a certain width does not deviate beyond or below the prescribed size, It was not possible to form seam allowances with different widths.

On the other hand, for example, a seat of an automobile largely consists of a cushion on which the occupant sits and a seatback on which the back is leaned while sitting.

These cushions and seatbacks have a structure in which a spring for load support is installed inside a mutually hinged frame, a foam pad is surrounded outside to form the basic shape of the seat, and a cover made of leather or fabric is covered on the outermost side. consist of.

The cover adheres well to the foam pad according to the shape of the seat without lifting, and is manufactured by mutually sewing fabric divided into several parts according to a design in consideration of aesthetics. After that, turn it inside out and put it on the sheet.

However, when the cover is covered on a sheet, the width of the upper and lower seams is different to minimize the effect on the appearance of the sheet as the thickness increases due to overlapping according to the state of the seam, and the narrow seam is covered with a wide seam and turned over in one direction Finish by sewing.

To this end, a worker manually cuts the upper and lower seam allowances with scissors or a cutter before sewing, but there is a problem in that the cutting line is uneven and the work takes a long time.

In addition, cutting can be performed in the sewing process, but there is a problem in that cost is added and workability is lowered due to frequent replacement of cutting blades.

1 is a view showing a conventional double multi-step seam allowance sewing guide, and FIG. 2 is a view showing a state in which seam allowances of fabrics are formed with different upper and lower widths with the sewing guide of FIG.

In Patent No. 10-1718402 (Title of Invention: Double Multi-Seam Welding Guide), as shown in FIG. 1, the main body of the sewing guide installed and fixed on the working table of the sewing machine, one side of which supports the seam allowance of the working fabric 1; a guide bar installed on one surface of the sewing guide main body to support a seam allowance between the work fabric 1 and the work fabric 2 to be sewn; A transfer screw portion fastened and fixed to an upper portion of the guide bar and having a rack formed on one side thereof; a guide cover fastened and fixed to the sewing guide main body in a state of covering an upper surface of the feed screw fastened with the guide bar; and a pinion engaged with the rack of the conveying screw portion, including a guide handle fastened to the sewing guide body, so that the lower end of one surface of the sewing guide body contacts and supports the seam allowance of the work fabric 1, and the support plate of the guide bar By configuring a double multi-step seam allowance structure that contacts and supports the seam allowance of the work fabric 2, and by adjusting the length of the guide bar, the work fabrics 1 and 2 for sewing can be sewn by supporting seam allowances having different upper and lower widths, The workability is improved and the content to enable uniform quality improvement accordingly is disclosed.

In such a conventional double multi-step seam allowance sewing guide 100, the corresponding guide is positioned so that the upper seam allowance width is smaller than the lower seam allowance width so that the operator can perform the sewing operation while checking the level difference.

However, as shown in FIG. 2, the guide bar 120 supporting the seam allowance of the work fabric 1 and the work fabric 2 to be sewn simply contacts the side surface, so defects due to separation of the work fabric 2 during the sewing operation There were problems that arose.

As a result, it is necessary to apply force and pay attention to holding the work fabric 2 so that it does not escape during the sewing operation, resulting in poor workability. When the work fabric 1 of a large size is positioned to form a narrow seam allowance and the work fabric 1 of a large size is positioned to form a wide seam allowance, the sewing operation is performed while holding the work fabric 2 of a small size by hand, which is very inconvenient. I had a problem doing it.

Patent No. 10-1718402 (Title of invention: Double multi-step seam allowance sewing guide)

This invention is to solve the above problem, by positioning the large first fabric at the top to form a wide seam allowance and positioning the small second fabric at the bottom to form a narrow seam allowance. The first fabric covers the second fabric and at the same time wraps the side of the second fabric, presses up and down, pushes up, maintains a firmly gripped state, guides it easily and accurately, and is equipped with a guide to form a seam allowance of different types of upper and lower parts that can be sewn. provide as a task.

In order to solve the above problems, the present invention is installed on the table 210, the needle plate 220 in which the tooth groove 221 is formed, and the needle plate 220 reciprocates back and forth inside the tooth groove 221 of the 220 A toothed member 230 in which a plurality of rows of teeth 231 and 232 protrude back and forth on the upper surface to transfer the fabric from the front side to the rear side, and a needle insertion hole 233 is formed at a predetermined position in the middle ) And, the first and second pressing pieces 241 and 242 on both sides of the needle plate 220 and the groove that opens forward from the upper part of the tooth member 230 are interposed therebetween to support the fabric, A sewing machine including a presser foot 240 in which a needle guide hole 243 is formed in a second pressing piece 242 facing the needle insertion hole 233 and having a guide for forming seam allowances of fabric with different vertical widths. In the above, the guide 250 for forming the seam allowance of the fabric with different vertical widths is installed on the bracket 251a fixed next to the other side of the needle plate 220, based on the seam line 30. The first fabric seam allowance forming guide 251 for guiding the formation of the first seam allowance 11 having a relatively wide width while in contact with the side surface of the first fabric 10, and on the outside of the other side of the toothed groove 221 A second fabric installed along the moving direction of the fabric and guided to form a second seam allowance 21 having a relatively narrow width while being firmly held at the top and bottom while in contact with the side surface of the second fabric 20 It includes a seam allowance forming guide 252, and the second outer seam allowance forming guide 252 is formed so that the needle insertion hole 233 is not covered on the front side, covering the upper surface of the side portion and lowering the end of one side downward. The second fabric side upper surface pressing portion 252a, which guides the upper side of the side of the second fabric 20 that is bent and moved while pressing, and inserts the needle while going from the second fabric side upper surface pressing portion 252a to the rear side The second fabric 20 extending and moving so that the ball 233 is not covered and a second fabric side wrapping portion 252b for guiding the formation of the second seam allowance 21 while wrapping the side of the presser foot 240 so as not to collide with the second fabric side wrapping portion 252b. It forms a corresponding part of the second pressing piece 242 where the needle guide hole 243 is formed, and the toothed member 230 makes the toothed row 231 on the front side higher than the toothed row 232 on the rear side. It is formed high, and the side of the moving second fabric 20 is pressed and pushed up from the top and bottom together with the upper surface pressing portion 252a of the second fabric side to form the second seam allowance 21 while firmly holding the upper and lower portions. It provides a sewing machine 200 having a guide for forming a seam allowance with a different vertical width, characterized in that the guide is sewn.

Preferably, the second seam allowance (252a) of the second fabric (20), which forms a high front side and connects to the second fabric side wrapping portion (252b) at an angle to move. 21) Easy entry.

According to the sewing machine having a guide for forming a seam allowance in which the width of the upper and lower parts of the present invention having the above solution is different, the first fabric having a large size on the upper part is positioned to form a wide seam allowance, and the A toothed member that presses and faces the side of the second fabric from the upper surface at the upper side of the side of the second fabric while the first fabric covers the second fabric by positioning the second fabric with a small size at the bottom to form a narrow seam allowance. By forming the row of teeth on the front side higher than the row of teeth on the rear side, protruding from the bottom and pushing it up, it guides to maintain a firmly gripped state, thereby eliminating work difficulty and lowering the defect rate to increase productivity and quality.

1 is a view showing a conventional double multi-stitch sewing guide;
2 is a view showing a state in which seam allowances of fabrics are formed with different upper and lower widths with the sewing guide of FIG. 1;
3 is a view showing a sewing machine having a guide for forming seam allowances of fabrics having different vertical widths according to an embodiment of the present invention;
4 is a view showing a guide for forming a second fabric seam allowance in various directions in the sewing machine of FIG. 3;
5 is a view showing a state in which the second fabric seam allowance forming guide of FIG. 4 is attached to the needle plate from various directions;
6 is a view showing the pressing piece of the presser foot changed according to the second fabric seam allowance forming guide in the sewing machine of FIG. 3;
Figure 7 is a view showing the toothed member in various directions in the sewing machine of Figure 3,
8 is cross-sectional views showing the state in which the toothed member of FIG. 7 is coupled to the needle plate of FIG. 5 in the direction of movement of the second fabric and perpendicular to the direction of movement,
9 is a view showing a state of sewing fabrics with a sewing machine having a guide for forming seam allowances of fabrics with different vertical widths according to an embodiment of the present invention;
10 is cross-sectional views showing the state in which the second fabric is guided in FIG. 9 by dividing the second fabric into a moving direction and perpendicular to the moving direction;
11 is a view showing an example in which a worker sews a fabric with a sewing machine having a guide for forming seam allowances of fabrics having different vertical widths according to an embodiment of the present invention;
12 is a view showing a cover sewn from the fabric in FIG. 11 and a state inverted by covering the narrow seam allowance with the wide seam of the sewn cover and finishing while sewing over in one direction.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings, which is intended to be described in detail so that a person skilled in the art can easily practice it. The technical spirit and scope of this invention are not meant to be limited. In addition, terms defining relative positions such as front and rear, left and right, up and down, and inside and outside are based on the accompanying drawings. Hereinafter, the remaining directions will be described based on the forward and backward transport directions of the fabric.

3 is a view showing a sewing machine having a guide for forming seam allowances of fabrics having different vertical widths according to an embodiment of the present invention, and FIG. 4 is a view showing a guide for forming a second fabric seam allowance in various directions in the sewing machine of FIG. 3 5 is a view showing a state in which the second fabric seam allowance forming guide of FIG. 4 is attached to the needle plate in various directions, and FIG. 6 is the pressing of the presser foot changed according to the second fabric seam allowance forming guide in the sewing machine of FIG. 3 7 is a view showing the sawtooth member in various directions in the sewing machine of FIG. 3, and FIG. 8 is a state in which the sawtooth member of FIG. 7 is coupled to the needle plate of FIG. 5 in the moving direction of the second fabric, And they are cross-sectional views divided into the direction of movement and the vertical.

As shown in FIGS. 3 to 5, the sewing machine 200 having a guide for forming seam allowances of a fabric having different upper and lower widths according to an embodiment of the present invention maintains a level difference in the seam allowances at the upper and lower ends during the sewing process. It is installed on the table 210 and is installed to reciprocate back and forth inside the needle plate 220 on which the tooth groove 221 is formed and the tooth groove 221 of the needle plate 220, and the upper surface A plurality of toothed rows 231 and 232 are formed to protrude back and forth to transfer the fabric from the front side to the rear side, and the sawtooth member 230 in which the needle insertion hole 233 is formed at a predetermined position in the middle, and the needle plate 220 and the first and second pressing pieces 241 and 242 on both sides of the upper portion of the sawtooth member 230 with a groove opening toward the front between them to support the fabric, and the needle insertion hole 233 ) and a presser foot 240 in which a needle guide hole 243 is formed on the second pressing piece 242 facing, and a guide 250 for forming seam allowances of fabric with different vertical widths.

The detailed structure and operation of the table, needle plate, sawtooth member, presser foot, etc. described above can be applied like a generally known sewing machine, so detailed descriptions will be omitted. ), and the toothed member 230, the presser foot 240, etc., which are different in relation to the guide 250, will be described in detail.

The guide 250 for forming the seam allowance of the fabric with different vertical widths includes the first fabric seam allowance forming guide 251 and the second fabric seam allowance forming guide 252, and the first fabric 10 positioned vertically. And the width of the second raw material 20 guides to form a different seam allowance.

The first fabric seam allowance forming guide 251 is installed on the bracket 251a fixed on the table 210 adjacent to the other side of the needle plate 220, and the first fabric guide 251 is attached to the sewing line 30 as a reference. It guides to form a first seam allowance 11 having a relatively wide width while in contact with the side surface of (10).

The first fabric seam allowance forming guide 251 is installed to be movable to one side and the other side, and the width of the first seam allowance 11 can be adjusted, and a fabric detachment prevention unit is provided on the side in contact with the first fabric 10. Can be installed overhang.

As shown in FIG. 5, the second fabric seam allowance forming guide 252 is formed in a groove shape along the moving direction of the second fabric 20 outside the other side of the tooth groove 221 of the needle plate 220. It is installed and guided to form the second seam allowance 21 having a relatively narrow width while being firmly and stably held in contact with the side of the moving second raw end 20, shown in the plane of FIG. 4 (a ), as can be seen from (b) shown on one side, and (c) shown inverted, the second outer side upper surface pressing portion 252a and the second outer side wrapping portion 252b are provided.

The upper side pressing part 252a of the second fabric side is formed so that the needle insertion hole 233 is not covered from the front side so that the side portion of the second fabric 20 is covered from the top and the end of one side is bent downward By doing so, the upper surface of the side of the moving second fabric 20 is kept pressed.

The upper side pressing portion 252a of the second fabric side has a high front side and is connected to the second fabric side wrapping portion 252b at an angle to make it easy for the moving second fabric 20 to enter the side.

The second fabric side wrapping portion 252b is the side of the second fabric 20 that extends and moves so that the needle insertion hole 233 is not covered while going from the second fabric side upper surface pressing portion 252a to the rear side. To keep the wrapped state to stably move the second fabric (20).

The toothed member 230, as can be seen from (a) shown in the plane of FIG. 6 and (b) shown from one side, the toothed row 231 on the front side is the toothed row 232 on the rear side. Formed higher, press and push the side of the moving second fabric 20 from the top and bottom together with the upper surface pressing portion 252a of the second fabric side to form the second seam allowance 21 while firmly holding the upper and lower portions guide

As shown in FIG. 7, the presser foot 240 concave a corresponding portion of the second pressing piece 242 where the needle guide hole 243 is formed so as not to collide with the second fabric side wrapping portion 252b. form

In addition, the second raw seam allowance forming guide 252 fixed to the needle plate 220 and the tooth member 240 coupled to reciprocate back and forth in the tooth groove 221 of the needle plate 220 are shown in FIG. As shown in the cross section (a) in the moving direction of the second member 20 and the cross section (b) perpendicular to the moving direction, they are coupled.

A detailed description will be given with reference to the accompanying drawings of a process of guiding a sewing machine according to an embodiment of the present invention having the above-described configuration to form upper and lower heterogeneous seams.

9 is a view showing a state in which fabrics are sewn with a sewing machine having a guide for forming seam allowances of fabrics with different vertical widths according to an embodiment of the present invention, and FIG. 10 shows a state in which the second fabric is guided in FIG. These are drawings shown in cross section by dividing the moving direction of the second fabric and perpendicular to the moving direction.

As shown in FIG. 9, in the sewing machine 200 according to the embodiment of the present invention, the seam allowance of fabrics having different vertical widths is formed so as to form a seam allowance between the first fabric 10 and the second fabric 20 with different vertical widths. It is sewn while guiding in the guide 250 to form.

Here, as shown in FIG. 10, the second fabric seam allowance forming guide 252 makes it easy to enter the side of the second fabric 20 moving to the front side formed high in the second fabric side upper surface pressing portion 252a. while holding down the upper surface of the side of the moving second fabric 20, the end of one side formed to be bent downward is pressed, and at the same time, the toothed row 231 on the front side formed high of the toothed member 230 moves The second fabric 20 to be pushed up from the bottom firmly holds the upper and lower parts as a whole.

And the second fabric 20, whose upper and lower parts are firmly held by the upper and lower parts of the second fabric side pressing portion 252a and the sawtooth member 230, wraps the side by the second fabric side wrapping portion 252b while going to the rear side It is maintained in this state to stably move the second fabric 20 .

11 is a view showing an example in which a worker sews a fabric with a sewing machine having a guide for forming seam allowances of fabrics having different vertical widths according to an embodiment of the present invention.

As shown in FIG. 11, in a state where the relatively large first fabric 10 covers the small second fabric 20, the side of the second fabric 20 is firmly held to prevent separation and stably It guides easily and accurately without defects while moving to , eliminating the hassle of work and increasing productivity and quality with uniform work even for non-skilled workers.

FIG. 12 is a view showing a cover sewn from the fabric in FIG. 11 and a wide seam allowance of the sewn cover covering the narrow seam allowance and turning it over in one direction while finishing and turning it over.

In this way, the cover, which is a sewing material to which the first fabric 10 and the second fabric 20 are sewn, is manually sewn by an operator using scissors or a cutter before sewing, as shown in FIG. 12 (a). The width of the upper and lower seam allowances can be solved by solving problems such as uneven cutting lines and long working hours due to cutting in steps or not cutting during the sewing process, as well as additional cost and low workability due to frequent replacement of cutting blades. As shown in (b) of FIG. 12, cover the narrow seam with a wide seam and finish by sewing over in one direction, and turn the cover over as shown in (c) of FIG. Depending on the state of the seam allowance, the thickness becomes thicker due to the overlapping, so there is no effect on the appearance of the sheet.

This invention is not limited to the above embodiment, and various modifications are possible within the scope of the invention described in the claims, and these modifications are also included within the scope of this invention.

10: 1st fabric
11: 1st seam allowance
20: 2nd fabric
21: 2nd seam allowance
30: sewing line
100: conventional sewing guide
110: sewing guide body
120: guide bar
130: feed screw part
140: guide cover
150: guide handle
200: Sewing machine having a guide for forming seam allowances with different vertical widths according to an embodiment of the present invention
210: table
220: needle plate
221: tooth groove
230: tooth member
231: front tooth row
232: rear tooth row
233: needle insertion hole
240: presser foot
241: 1st pressing side
242: 2nd pressing side
243: needle guide
250: A guide that forms the seam allowance of the fabric with different vertical widths
251: first fabric seam allowance formation guide
251a: Bracket
252: second fabric seam allowance formation guide
252a: upper side pressing part of the second fabric side
252b: second fabric side wrapping portion

Claims (2)

It is installed on the table 210, and is installed to reciprocate back and forth inside the needle plate 220 having the tooth groove 221 and the tooth groove 221 of the needle plate 220, and a plurality of tooth rows on the upper surface. (231) (232) is formed to protrude back and forth to transfer the fabric from the front side to the rear side, and the sawtooth member 230 in which the needle insertion hole 233 is formed at a predetermined position in the middle, and the needle plate 220 and the saw teeth First and second pressing pieces 241 and 242 on both sides of the upper portion of the member 230 with a groove opening toward the front support the fabric and face the needle insertion hole 233. 2 In the sewing machine including a presser foot 240 in which a needle guide hole 243 is formed on the pressing piece 242 and having a guide for forming seam allowances of fabric with different vertical widths,
The guide 250, which forms the seam allowance of the fabric with different vertical widths,
The first seam allowance ( 11) a first fabric seam allowance forming guide 251 for guiding to form;
Installed along the moving direction of the fabric from the outside of the other side of the sawtooth groove 221, and in contact with the side surface of the second fabric 20 having a relatively narrow width, the second seam allowance is firmly held at the top and bottom Including a second fabric seam allowance forming guide 252 for guiding to form (21),
The second fabric seam allowance forming guide 252 is formed so that the needle insertion hole 233 is not covered on the front side so that the upper surface of the side portion is bent downward while moving the second fabric 20 ) The second fabric side upper surface pressing portion 252a, which guides the upper side of the side in a pressed state, and the needle insertion hole 233 extends so as not to be covered while going from the second fabric side upper surface pressing portion 252a to the rear side It includes a second fabric side wrapping portion 252b that guides the second seam allowance 21 to be formed while wrapping the side of the moving second fabric 20,
The presser foot 240 forms a corresponding part of the second pressing piece 242 where the needle guide hole 243 is formed so as not to collide with the second fabric side wrapping part 252b,
The toothed member 230 forms the toothed row 231 on the front side higher than the toothed row 232 on the rear side, so that the side of the moving second fabric 20 is the second fabric side upper surface pressing part ( 252a), a sewing machine (200) having a guide for forming seam allowances with different widths, characterized in that the upper and lower parts are firmly held by pressing and pushing up from the upper and lower parts and guiding and sewing to form the second seam allowance (21). ). According to claim 1,
The second fabric side upper surface pressing portion 252a is formed high on the front side and is inclinedly connected to the second fabric side wrapping portion 252b to facilitate side entry of the moving second fabric 20. Characterized in that A sewing machine 200 having a guide for forming a seam allowance with a different vertical width.

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