KR20240094818A - Sewing machine with integrated seam sealing process - Google Patents

Abstract

The present invention relates to a sewing device incorporating a seam sealing process, and more specifically, to a sewing unit that forms a sewing line by sewing both sides of the material fabric; a conveying unit for moving the material fabric on which a sewing line is formed by the sewing unit in one direction; a seam supply unit disposed between the sewing unit and the transfer unit and wound with a seam tape; and a first guide part disposed below the seam supply unit to guide downward movement of the seam tape supplied from the seam supply unit; and a heating unit disposed below the first guide unit and consisting of a second guide unit for guiding the seam tape to the transfer unit and a heating plate for heating the sewing line to a predetermined temperature, wherein the first and The seam tape, which is transferred to the transfer unit through the second guide unit, is disposed in contact with the upper part of the sewing line and is adhered to the upper surface of the sewing line by pressure from the transfer unit.
In other words, the present invention integrates the seam sealing process for attaching seam tape to the upper surface of the sewing line into one process, thereby reducing manpower due to separate processes, thereby reducing lead time and cost in the manufacturing process. We would like to propose a sewing device that integrates the seam sealing process.

Description

Sewing machine with integrated seam sealing process}

The present invention integrates the seam sealing process for attaching seam tape to the upper surface of the sewing line into one process after the sewing process, thereby reducing manpower due to separate processes, thereby reducing lead time and costs in the manufacturing process. This relates to a sewing device that integrates a seam sealing process.

Generally, the bed of a sewing machine is equipped with a needle plate formed with a tooth groove that protrudes teeth for transporting the sewn material to the outside, and a presser foot is provided on the upper part of the needle plate to press the sewn material to the needle plate. Then, the needle bar on which the upper thread is caught is inserted and removed into the tooth groove, and the lower thread installed on the lower side of the needle plate is raised to perform stitching.

Meanwhile, when sewing various products, including clothing, the end of the product is wrapped with border fabric, also called 'bias tape.' At this time, the cross section of the border fabric is folded into a multi-layer structure so that the edge of the border fabric is not exposed to the outside, and the folded border fabric is sewn to surround the end of the sewn material.

In this way, when sewing using a sewing machine, if the user folds the edge of the border fabric by hand while sewing, it is not only difficult and inconvenient, but also the sewing speed is lowered and productivity is lowered. Therefore, it is generally supplied by folding the border fabric. Use the attachment by attaching it to the area adjacent to the presser foot.

In this regard, a sewing machine presser foot attachment has been disclosed in Registered Utility Model No. 20-0475500. The disclosed prior literature includes an attachment main body having an inflow portion through which the border fabric flows in, a folding portion that folds the inflowed edge fabric into the required cross-sectional shape, and a supply portion that supplies the folded edge fabric to the edge portion of the sewn object; A base plate connected to the lower side of the attachment body and placed on the upper surface of the needle plate of the sewing machine so that the supply portion is positioned in front of the presser foot of the sewing machine; a fixing protruding piece protruding from the rear of the attachment body to be located to the right of the presser foot and having a magnet attached to the needle plate on its bottom; And a position regulation piece provided adjacent to the left end of the fixing protrusion piece to regulate the position of the border fabric supplied from the supply part of the attachment main body so that the border fabric does not spread at the end of the sewn material.

The above-mentioned prior literature is an auxiliary device for sewing by folding the border fabric to cover the end of the sewn object.

Meanwhile, the above-mentioned sewing machine and presser foot attachment are also used to produce firefighting uniforms, quarantine uniforms, police uniforms, and clothing worn by people performing special missions.

Seam tape for sealing is attached to the seams of clothing worn by people performing special missions to prevent liquid or gas from penetrating from the outside to the inside.

According to the prior art, special clothing was manufactured by separately sewing and sealing processes using the above-mentioned devices and auxiliary devices.

However, devices and auxiliary devices according to the prior art require two or more working devices and two or more manpower, and thus have the problem of high process costs.

Therefore, there is a need for a technology that can solve the problems caused by the prior art mentioned above.

Korean Registered Utility Model Publication No. 20-0475500 (2014.11.28.)

The present invention was created to solve the problems described above,

After the sewing process, the seam sealing process for attaching seam tape to the upper surface of the sewing line is integrated into one process to reduce manpower due to separate processes, thereby reducing lead time and costs in the manufacturing process. It is done for one purpose.

Another purpose of the present invention is to improve work efficiency and reduce the defect rate by introducing a plurality of guide parts to ensure smooth supply of the seam tape and preventing the phenomenon of lifting or flying during the transfer of the seam tape.

A sewing device incorporating a seam sealing process according to the present invention includes a sewing unit that forms a sewing line by sewing both sides of the material fabric; a conveying unit for moving the material fabric on which a sewing line is formed by the sewing unit in one direction; a seam supply unit disposed between the sewing unit and the transfer unit and wound with a seam tape; and a first guide part disposed below the seam supply unit to guide downward movement of the seam tape supplied from the seam supply unit; and a heating unit disposed below the first guide unit and consisting of a second guide unit for guiding the seam tape to the transfer unit and a heating plate for heating the sewing line to a predetermined temperature, wherein the first and The seam tape, which is transferred to the transfer unit through the second guide unit, is disposed in contact with the upper part of the sewing line and is adhered to the upper surface of the sewing line by pressure from the transfer unit.

The first guide part according to the present invention includes a support block provided on the upper part of the heating unit, a guide plate spaced apart from the support block at a predetermined interval, and a space between the support block and the guide plate to transport the seam tape. It is characterized by comprising a guide hole for the guide plate, a guide end provided at the bottom of the guide plate, and bent in the transport direction of the seam tape.

The second guide part of the heating part according to the present invention is characterized by being composed of a convex surface part formed as a convex curved surface to prevent the seam tape from lifting when moving.

The second guide part of the heating part according to the present invention is provided with a concave part formed as a concave curved surface to guide the movement of the seam tape, and a guide member is further provided on the upper part of the concave part to prevent the seam tape from lifting. It is characterized by

The sewing device incorporating the seam sealing process according to the present invention integrates the seam sealing process for attaching the seam tape to the upper surface of the sewing line into one process, thereby reducing manpower due to separate processes and manufacturing through this. Lead time and costs in the process can be reduced.

In addition, the present invention introduces a plurality of guide parts to ensure smooth supply of the seam tape, thereby preventing the phenomenon of lifting or flying during the transfer of the seam tape, thereby improving work efficiency and significantly reducing the defect rate.

1 is a cross-sectional view showing a sewing device incorporating a seam sealing process according to the present invention;
Figure 2 is a cross-sectional view showing a first embodiment of the first guide part and the second guide part of the sewing device according to the present invention;
Figure 3 is a cross-sectional view showing a second embodiment of the first guide part and the second guide part of the sewing device according to the present invention;
Figure 4 is a cross-sectional view showing the heating part of the sewing device according to the present invention;

In order to explain the present invention, the operational advantages of the present invention, and the purpose achieved by practicing the present invention, preferred embodiments of the present invention will be exemplified and examined with reference to them.

First, the terms used in this application are only used to describe specific embodiments and are not intended to limit the present invention, and singular expressions may include plural expressions unless the context clearly indicates otherwise. In addition, in the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other It should be understood that this does not exclude in advance the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

In describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

As shown in Figures 1 to 4, the sewing device incorporating the seam sealing process according to the present invention includes a sewing unit 10, a seam supply unit 30 for supplying the seam tape 3, and a seam tape 3. ), a transfer unit 20 for transferring the seam tape 3, a first guide unit 40 for guiding the movement of the seam tape 3, and a heating unit 50 for heating the sewing line.

As shown in Figure 1, the sewing unit 10 according to the present invention is configured to form a sewing line by sewing both sides of the material fabric 1.

That is, the sewing unit 10 includes a frame 11 disposed at a predetermined height, a sewing needle 13 mounted on the lower part of the frame 11, and a presser foot mounted on the lower part of the frame 11 adjacent to the sewing needle 13. It consists of (15).

When the sewing unit 10 configured as described above sews both sides of the material fabric 1, thread is sewn to form a sewing line.

In this way, the sewing line remaining on the material fabric 1 through the sewing process may cause a rough discomfort when it comes into contact with the user's skin, and in some cases, may cause skin trouble.

Also, depending on the purpose of use of the clothing, for example, firefighting clothing, quarantine clothing. When used for special mission purposes such as protective clothing, protective clothing, police uniforms, etc., pollutants, harmful gases, liquids, etc. may penetrate into the clothing through the sewing lines of the clothing.

For this purpose, a seam tape (3) is usually attached to the sewing line of clothing to reduce discomfort and maintain airtightness of clothing.

In this way, the seam sealing process of attaching the seam tape 3 to the sewing line usually involves attaching the seam tape 3 to the sewing line using separate equipment after the sewing process.

In other words, since the existing seam sealing process is carried out as a separate process from the sewing process, not only does it require more manpower, but it also increases the lead time and production cost in the manufacturing process.

Therefore, in the present invention, after the sewing process by the sewing unit 10, the seam sealing process is performed on the same process to solve the problems of the prior art.

Hereinafter, the components for performing the sewing process and the seam sealing process integrated into one process will be described in detail with reference to the attached drawings.

As shown in Figures 1 to 4, the transfer unit 20 according to the present invention can move the sewn material from the sewing unit 10 in one direction and press the seam tape 3 to adhere it to the upper surface of the sewing line. It is structured so that

That is, the transfer unit 20 is composed of a first transfer unit 20A disposed at the top and a second transfer unit 20B disposed at the bottom corresponding to the first transfer unit 20A.

First, the sewing device according to the present invention is provided with a guide part 5 so that the sewn two-ply material fabric 1 is inserted and guided from the sewing part 10 to the conveying part 20. In this case, the side on which the sewing line is formed is disposed on the upper side of the guide portion 5.

Next, the first transfer unit 20A is provided with first rollers 21 at both ends, and the pair of first rollers 21 are connected by a first belt 23 and are configured to interlock. The second transfer unit 20B is also provided with second rollers 25 at both ends, and the pair of second rollers 25 are connected by a second belt 27 and are configured to interwork. That is, the first transfer unit 20A is located at the upper part of the guide unit 5, and the second transfer unit 20B is located at the lower part of the guide unit 5.

In this way, the first roller 21 and the second roller 25 are arranged at the top and bottom, respectively, to transport the material fabric 1 and at the same time press the seam tape 3 on the upper surface of the sewing line heated by the heating unit to be described later. It is then glued together. In this case, the sewing line of the material fabric 1 is pressed and contacted by the first roller 21, and at the same time, the material fabric 1 without a sewing line is pressed and contacted by the second roller 25 to be molded.

Meanwhile, although not shown in the accompanying drawings, it is possible for a heating device to supply heat to the first roller 21 or the second roller 25, or the first and second rollers 25 themselves.

As shown in FIGS. 1 to 4, the seam supply unit 30 according to the present invention is configured to supply the seam tape 3 to the transfer unit 20.

For this purpose, the seam supply unit 30 is disposed on the frame 11 and includes a supply roller 31 on which the seam tape 3 is wound, and a seam tape disposed below the supply roller 31 and supplied from the supply roller 31 ( It consists of a guide roller (33) to guide 3) downward.

The supply roller 31 is rotatably disposed on the bracket 35 mounted on the frame 11 to supply the wound seam tape 3, and the guide roller 33 moves downward through the supply roller 31. The moving seam tape (3) is rotated and supported.

In this way, the seam tape 3 supplied from the seam supply unit 30 can be supplied to the transfer unit 20 through the first and second guide parts 52, which will be described later.

As shown in Figures 1 to 4, the first guide unit 40 according to the present invention guides the seam tape 3 so that the seam tape 3 supplied from the seam supply unit 30 can be smoothly transferred. It is configured to do so.

For this purpose, the first guide unit 40 includes a support block 41 provided on the upper part of the heating unit 50, a guide plate 43 spaced apart from the support block 41 at a predetermined interval, a support block 41, and A guide hole 45 formed in the space between the guide plates 43 for transporting the seam tape 3, and a guide end provided at the bottom of the guide plate 43 and bent in the transport direction of the seam tape 3. It is composed including (47).

The support block 41 of the first guide part 40 is mounted on the installation part 7 extending from the frame 11 and has a block shape. Additionally, the guide plate 43 is mounted on the support block 41 at predetermined intervals. In this case, the guide hole 45 is disposed in the space between the support block 41 and the guide plate 43.

Therefore, the seam tape 3 supplied from the seam supply unit 30 can be supplied to the transfer unit 20 through the guide hole 45.

In particular, a guide end 47 is formed at the lower end of the guide plate 43, and this guide end 47 may be formed to be curved and bent in the transport direction of the seam tape 3. That is, when the seam tape 3 transferred through the guide hole 45 is transferred to the transfer unit 20, the seam tape 3 can be naturally moved by the guide end 47.

In this case, the guide end 47 is disposed on the second guide part 52 of the heating part 50, that is, the upper part of the convex surface part 52a to the concave surface part 52b, and the guide end 47 and the second guide The separation distance between the parts 52 can be designed to allow the seam tape 3 to pass through.

This is because when the separation distance between the guide end 47 and the second guide part 52 is large, the seam tape 3 may be lifted or may fly in a lifted state, so the guide end 47 and the second guide part 52 By minimizing the separation distance between the seam tapes (3), it is possible to prevent the seam tape (3) from lifting or flying away, thereby not only ensuring smooth transfer of the seam tape (3), but also reducing process efficiency and defect rate.

As shown in Figures 1 to 4, the heating unit 50 according to the present invention is configured to heat the sewing line of the material fabric 1 and heat-compress the seam tape 3 and the sewing line portion in the transfer unit 20. .

For this purpose, the heating unit 50 includes a second guide unit 52 disposed below the first guide unit 40 to guide the seam tape 3 to the transfer unit 20, and a second guide unit 52 for heating the sewing line to a predetermined temperature. It consists of a heating plate (53).

First, the heating unit 50 is provided with a main body 51 having an inner chamber 51a as shown in FIG. 4, and a heating plate 53 is disposed on the inner bottom of the main body 51. Accordingly, heat is applied to the seam line portion of the material fabric 1 passing under the heating plate 53. In this case, the heating plate 53 maintains a predetermined temperature using power provided from the outside.

Next, the front surface of the main body 51 is provided with a second guide portion 52 that has a curved shape. The second guide part 52 serves to guide the seam tape 3 that has passed through the first guide part 40 so that it can be transferred to the transfer part 20.

In this case, when the second guide part 52 is formed like a concave part 52b as shown in FIG. 3, the seam tape 3 does not contact the concave part 52b due to the pulling force by the transfer part 20. A feeling of restlessness or excitement may occur.

Accordingly, the second guide portion 52 according to the present invention may be composed of a convex surface portion 52a whose curved shape is convex. In this way, when the second guide part 52 is configured to have a convex surface, the seam tape 3 that has passed through the guide end 47 of the first guide part 40 is transported in contact with the block surface part, thereby forming the seam tape 3. It can prevent the phenomenon of lifting or flying.

Another example of the second guide portion 52 is a case where the curved shape is formed as a concave portion 52b, as described above. In this case, in order to prevent the seam tape 3 from lifting or flying off, The guide member 52c corresponding to the concave portion 52b, that is, a roller, is disposed to transport the seam tape 3 to the space between the concave portion 52b and the guide member 52c, thereby lifting the seam tape 3. It is possible to prevent the phenomenon of blowing.

Therefore, the first guide part 40, especially the guide end part 47 and the second guide part 52, prevent the seam tape 3 from lifting or blowing during transport, thereby facilitating the supply of the seam tape 3. In addition, process efficiency can be increased and defect rates can be reduced.

Meanwhile, the heating unit 50 has a plurality of air injection holes 54 formed at regular intervals on the rear surface 51b of the main body, so that compressed air provided from the outside can be sprayed laterally. At this time, the air injection hole 54 can evenly distribute the heat generated from the heating plate 53.

For this purpose, a compressed air supply pipe 55 that provides compressed air to the air injection hole 54 may be installed on the upper surface 51c of the main body, that is, a flat portion extending from the top of the second guide portion 52, The support block 41 may be connected to the compressed air supply pipe 55 to form a flow path for supplying compressed air to the inner room. Additionally, a power supply line 56 capable of providing power to the heating plate 53 may be mounted on the upper surface 51c of the main body.

In this case, the hot air sprayed from the air injection hole 54 is applied to the sewing line supplied from the sewing unit 10, thereby having a preheating function. The sewing line in this preheated state can be heated more efficiently as it passes through the heating plate 53.

As such, the present invention has been described with reference to an embodiment shown in the drawings, but this is merely illustrative, and various modifications and other equivalent embodiments can be made by those skilled in the art. You will understand.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached claims.

1: Material fabric
3: Them tape
5: Information department
10: Sewing department
11: Frame 13: Sewing Needle
15: presser foot 17: installation part
20: transfer unit
20A: first transfer unit 20B: second transfer unit
21: first roller 23: first belt
25: second roller 27: second belt
30: Sem supply unit
31 ; Supply roller 33: Guide roller
35 ; bracket
40: first guide part
41 ; Support block 43: Guide plate
45: guide hole 47: guide end
50: Heating part
51: main body 51a: interior
51b: rear of main body 52: second guide part
52a: convex surface portion 52b: concave surface portion
52c: guide member 53: heating plate
54: Air injection hole 55: Compressed air supply pipe
56: power supply line

Claims (4)

A sewing unit 10 that forms a sewing line by sewing both sides of the material fabric 1;
A conveying unit 20 for moving the material fabric 1 on which a sewing line is formed by the sewing unit 10 in one direction;
A seam supply unit 30 disposed between the sewing unit 10 and the transfer unit 20 and wound with a seam tape 3; and
A first guide unit 40 disposed below the seam supply unit 30 to guide downward movement of the seam tape 3 supplied from the seam supply unit 30; and
It consists of a second guide part 52 disposed below the first guide part 40 to guide the seam tape 3 to the transfer part 20, and a heating plate 53 for heating the sewing line to a predetermined temperature. It includes a heating unit (50),
The seam tape 3, which is transferred to the transfer unit 20 through the first and second guide units 52, is placed in contact with the upper part of the sewing line and is adhered to the upper surface of the sewing line by pressure from the transfer unit 20. A sewing device that features an integrated seam sealing process.
The method of claim 1, wherein the first guide portion 40 is
A support block 41 provided on the heating unit 50,
A guide plate (43) spaced apart from the support block (41) at a predetermined interval,
A guide hole (45) formed in the space between the support block (41) and the guide plate (43) for transporting the seam tape (3),
A sewing device incorporating a seam sealing process, characterized in that it is provided at the bottom of the guide plate (43) and includes a guide end (47) bent in the transport direction of the seam tape (3).
According to claim 1,
The second guide part 52 of the heating part 50 is integrated with a seam sealing process, characterized in that it is composed of a convex surface part 52a formed as a convex curved surface to prevent the seam tape 3 from lifting when moving. sewing device.
According to claim 1,
The second guide part 52 of the heating part 50 is provided with a concave surface part 52b formed as a concave curved surface to guide the movement of the seam tape 3,
A sewing device incorporating a seam sealing process, characterized in that a guide member (52c) is further provided on the upper part of the concave portion (52b) to prevent the seam tape (3) from lifting.