Sewing device capable of easily sewing bent part

Abstract

The present invention provides a sewing device capable of easily sewing a curved portion, and the sewing device according to an embodiment of the present invention comprises: a shelf portion, a support table portion which is located on the front surface of the shelf portion, is capable of reciprocating in the longitudinal direction, and on which an object to be operated is placed, the support table portion being located on the front surface of the shelf portion, and the support table portion being located on the front surface of the shelf portion; and a bobbin coupling part located at the lower part of the support base part and formed by extending in the vertical direction. A slit formed by extending in the length direction is formed in the supporting table part; the position of the bobbin coupling part can be adjusted in the vertical direction, so that the upper end part of the bobbin coupling part can protrude towards the upper part of the slit.

Description

Technical Field

[0001] The present invention relates to a sewing device that can easily sew a bent portion, and more particularly, to a sewing device that can easily sew a bent portion by enabling a bobbin coupling portion to move in a vertical direction. Background Art

[0002] Sewing devices can be used for various purposes, for example, household use, embroidery use, industrial use, etc. In recent years, large products have been sewn by precise computer control, and their applications have gradually expanded.

[0003] Sewing based on sewing devices can also be applied to automotive parts. It can be used in both interior and exterior parts. In particular, in interior parts, such as Figure 12 As shown, a sewing device is used to form decorative seams.

[0004] The sewing device usually consists of a shelf, a bobbin, a shuttle, a needle, etc. Figure 13 This diagram illustrates a typical conventional sewing device. The needle is positioned above the workpiece, which is loaded onto a shelf. The bobbin, shuttle, and other components are located below. As the workpiece moves longitudinally, the needle performs a vertical reciprocating motion, working in conjunction with the bobbin and shuttle to sew the workpiece. The principles of sewing are well known, so a detailed description will be omitted.

[0005] However, the vertical position of the bobbin and the shuttle of a general sewing device is fixed. Therefore, there is no big problem for flat workpieces, but Figure 14 As shown, in a workpiece having a portion concave due to bending, there is a problem in that the sewing quality differs between the bent portion and the non-bent portion.

[0006] Since the distance between the needle and the bobbin and shuttle is fixed, if the height (or width) of the bent portion of the workpiece is higher than the distance between the needle, the bobbin, and the shuttle, the operator needs to change the position of the workpiece each time to push the workpiece between the needle, the bobbin, and the shuttle. During this process, the workpiece is sewn in a bent state, resulting in poor sewing quality. In addition, when the workpiece is bent to push the workpiece in, the bent workpiece still contacts the needle while it is on the shelf, resulting in double sewing or the workpiece itself being bent.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Korean Patent Gazette No. 10-2173775 Summary of the Invention

[0010] Problems to be solved by the invention

[0011] The present invention relates to a sewing device that can easily sew a bent portion, and more specifically, to a sewing device that can easily sew a bent portion by enabling a bobbin coupling portion to move in a vertical direction.

[0012] Means used to solve problems

[0013] In order to achieve the purpose of the present invention, a sewing device that can easily sew a bent part according to the present invention includes: a shelf portion, a support platform portion, which is located in front of the shelf portion and can reciprocate along the length direction, and the workpiece is placed on the support platform portion, and a winding drum coupling portion, which is located at the lower part of the support platform portion and extends along the vertical direction; a slit extending along the length direction is formed in the support platform portion; the winding drum coupling portion can adjust its position in the vertical direction so that the upper end portion of the winding drum coupling portion can protrude toward the upper part of the slit.

[0014] In addition, according to the sewing device of the present invention that is easy to sew the bent part, the bobbin coupling part includes: a head, which accommodates the bobbin and the shuttle, a post bed, which extends to the lower part of the head in the vertical direction, a first belt, which is combined with the head and the post bed, and provides rotational power to the shuttle accommodated in the head, and a head hole, which is formed in the upper part of the head, and the needle located in the upper part of the bobbin coupling part in the vertical direction passes through the head hole.

[0015] In addition, according to the sewing device of the present invention, which is easy to sew the bent part, it also includes a height adjustment part located at the lower part of the winding drum joint in the vertical direction; the height adjustment part includes: a pair of guide members, which are separated from each other by a specified interval in the length direction and extended in the vertical direction, a first panel, which contacts the inner sides of the pair of guide members at the same time and can be raised and lowered in the vertical direction, and a second panel, which contacts the upper part of the first panel in the vertical direction; the lower end of the column bed is clamped and coupled to a groove recessed in the rear surface direction of the second panel; the column bed is raised and lowered in the vertical direction corresponding to the raising and lowering of the first panel and the second panel in the vertical direction.

[0016] In addition, according to the sewing device of the present invention that is easy to sew the bent part, a plurality of guide slits are formed on the pair of guide members and extend in the vertical direction facing each other; a plurality of first panel holes are formed on both sides of the first panel and face the plurality of guide slits respectively; a bolt is simultaneously passed through any one of the plurality of guide slits and any one of the plurality of first panel holes facing any one of the slits to determine the vertical position of the first panel.

[0017] In addition, the sewing device that can easily sew a bent portion according to the present invention further includes: a transmission part that receives rotational power from a main motor located at a portion of the shelf part; and the transmission part transmits the rotational power to the shuttle.

[0018] In addition, according to the sewing device of the present invention that can easily sew a bent part, the transmission part includes: a shaft that receives rotational power from the main motor and is located at the lower part of the first panel in the vertical direction, and a pulley that is combined with the front end of the shaft; the lower end of the first belt in the vertical direction is combined with the pulley in a manner of wrapping the pulley; the rotational power transmitted from the main motor is transmitted to the shuttle via the pulley and the first belt.

[0019] Furthermore, according to the sewing device of the present invention that facilitates sewing of a bent portion, the position of the support table can be adjusted in the width direction.

[0020] Effects of the Invention

[0021] In the present invention, the vertical positions of the bobbin and the shuttle and the widthwise position of the support platform on which the workpiece is loaded can be adjusted, thereby improving production efficiency and working speed and enhancing sewing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a diagram showing the overall structure of the sewing device of the present invention.

[0023] Figure 2 This is an enlarged view of the bobbin joint portion.

[0024] Figure 3 and Figure 4 This is a diagram showing an enlarged view of the height adjustment portion of the present invention.

[0025] Figure 5 This is a diagram showing a state in which the position of the first panel is changed to rise in the vertical direction.

[0026] Figure 6 It is a diagram showing a state where the second panel is removed.

[0027] Figure 7 FIG. 1 is a diagram showing a state where the second panel is coupled.

[0028] Figure 8 It is a diagram showing the structure of the connection part.

[0029] Figure 9 It is a diagram showing the structure of the transmission unit.

[0030] Figure 10 and Figure 11 It is a diagram showing the configuration of a support frame adjustment unit, a guide unit, and a drive unit.

[0031] Figure 12 This photo shows sewing work on automotive interior parts.

[0032] Figure 13 This is a diagram showing a conventional general sewing machine.

[0033] Figure 14 This is a diagram showing an example of a curved workpiece.

[0034] Figure 15 This is an enlarged view showing the vicinity of the second support platform.

[0035] Description of Reference Signs

[0036] 100: shelf; 200: support platform; 300: winding drum joint; 400: height adjustment; 500: connection; 600: transmission; 700: support frame adjustment; 800: guide; 900: drive; 1000: needle DETAILED DESCRIPTION

[0037] The following is a detailed description of the present invention with reference to the accompanying drawings. The following embodiments are provided for the purpose of fully conveying the concepts of the present invention to those skilled in the art. Therefore, the present invention is not limited to the embodiments described below and may be implemented in other forms. In addition, in the drawings, the size and thickness of the device may be exaggerated for convenience. Throughout this specification, the same reference numerals represent the same components.

[0038] Figure 1 1 is a diagram showing the overall structure of the sewing device of the present invention. The sewing device of the present invention generally includes a shelf portion 100 , a support platform portion 200 , a bobbin coupling portion 300 , and a height adjustment portion 400 .

[0039] The shelf portion 100 includes a shelf and a frame constituting the shelf, and serves to support various structures described below. The support platform 200 is located in front of the shelf portion 100, and the workpiece is loaded on the support platform 200. Furthermore, when the workpiece is loaded on the support platform 200, the support platform 200 can reciprocate along its longitudinal direction, thereby sewing the workpiece.

[0040] The bobbin coupling portion 300 is located below the support platform 200 and is coupled to a bobbin, a shuttle, etc. The height adjustment portion 400 is located below the bobbin coupling portion 300 in the vertical direction and is used to adjust the vertical height of the bobbin coupling portion 300 .

[0041] Figure 2 This is an enlarged view of the bobbin coupling portion 300 .

[0042] The bobbin coupling 300 includes a head 310, a post bed 320, and a first belt 330. The head 310 houses the bobbin and the shuttle. The head 310 includes a housing 311, a head hole 312, and a receiving hole 313. The head hole 312 is formed in the upper portion of the housing 311 and has a hollow portion extending through the housing 311. The needle 1000 passes through the head hole 312, reaches the bobbin and shuttle, and performs sewing. The receiving hole 313 has a hollow portion formed to accommodate the bobbin and shuttle.

[0043] The post bed 320 extends vertically downward from the head 310. Furthermore, a first belt 330 is coupled to the head 310 and the post bed 320. The vertically upper portion of the first belt 330 is linked to the shuttle housed within the head 310 and provides rotational power to the shuttle. Although not shown, the upper portion of the first belt 330 is secured to a pulley formed on the rear surface of the shuttle, thereby transmitting rotational power to the shuttle. As the shuttle rotates, the bobbin within the shuttle rotates as the thread is brought up. The structure of the vertically lower portion of the first belt 330 will be described later.

[0044] At this time, the column bed 320 is a bar structure extending in the vertical direction, so a part of the lower part of the support platform 200 is penetrated by the slit 210 to ensure sufficient space for the workpiece to wait before sewing. Therefore, unlike the existing technology, it is possible to prevent the workpiece from bending during the sewing process.

[0045] Figure 3 and Figure 4 This is a diagram showing an enlarged view of the height adjustment portion of the present invention.

[0046] The height adjustment unit 400 includes a guide 410, a first panel 420, and a second panel 430. The guides 410 are formed as a pair, spaced apart longitudinally at a predetermined distance, forming a vertically extending wall. Furthermore, each guide 410 is formed with a plurality of guide slits 411 extending vertically. The function of the guide slits 411 will be described later.

[0047] The first panel 420 has a predetermined height in the vertical direction and is located inside and in contact with the pair of guides 410 and is vertically movable. The second panel 430 is in contact with the vertical upper portion of the first panel 420 and has a stacked shape.

[0048] The first panel 420 and the second panel 430 each have a groove that is recessed toward the rear surface in the width direction. Therefore, the first panel 420 and the second panel 430 each have a "匚"-shaped cross section.

[0049] At this time, the groove recessed along the rear surface of the second panel 430 grips the lower vertical end of the post bed 320. Therefore, in response to the vertical movement of the first and second panels 420, 430, the post bed 320 also rises and falls vertically. The head 310, coupled to the vertical upper end of the post bed 320, and the bobbin and shuttle housed within the head 310 also rise and fall vertically. This structure, unlike the prior art, allows the vertical position of the bobbin and shuttle to be changed. The method for changing the vertical position will be described later.

[0050] Next, refer to Figures 3 to 5 , a method for adjusting the height of the height adjusting portion 400 in the vertical direction will be described.

[0051] A plurality of first panel holes 421 facing the plurality of guide slits 411 are formed on both sides of the first panel 420. Figure 4 As shown in FIG. 1 , the bolt 1100 is pushed from the outside of the guide 410 to the inside, and is tightened after passing through the guide slit 411 and the first panel hole 421 in sequence, thereby determining the vertical position of the first panel 420. At this time, the bolt 1100 can be tightened as shown in FIG. Figure 4 As shown, a plurality of holes are formed. In addition, as previously described, the first panel holes 421 are formed on both sides of the first panel 420 and are respectively inserted with bolts 1100, thereby improving the fixing stability. At this time, the second panel 430 is subordinately determined according to the position of the first panel 420.

[0052] Therefore, if the operator wants to raise the vertical position of the column bed 320 in order to change the position of the bobbin and the shuttle, after removing the bolt 1100, the first panel 420 is moved in the vertical direction to position the bobbin and the shuttle in the desired position, and then the bolt 1100 is tightened again as described above, so that the vertical position of the first panel 420 is fixed at the corresponding position. Figure 5 1 is a diagram showing a state in which the position of the first panel 420 is changed to rise in the vertical direction. Therefore, there is an advantage in that the position of the bobbin and the shuttle can be easily and immediately changed according to the form of the workpiece, and thus the sewing quality can be improved.

[0053] Figure 6 is a diagram showing a state where the second panel is removed, Figure 7 1 is a diagram showing a state where the second panel is joined. Figure 6 as well as Figure 7 , the connection relationship between the first panel and the second panel and the method of fine-tuning the length direction of the column bed 320 are described.

[0054] Reference Figure 6 A pair of first panel slits 422 are formed around the recessed groove of the first panel 420 and pass through in the vertical direction. Figure 7 A pair of 2-1 panel holes 431 are formed in the second panel 430 at positions facing the first panel slit 422 in the vertical direction. Therefore, when a fixing member (for example, a bolt) is simultaneously passed through the 2-1 panel holes 431 and the first panel slit 422 from the upper part to the lower part in the vertical direction, the first panel 420 and the second panel 430 are connected, and the connection stability is improved due to the fixing.

[0055] In addition, refer to Figure 7 Multiple 2-2 panel holes 432 are formed in front of and behind the 2-1 panel hole 431 in the width direction. The operator inserts multiple fixings (for example, bolts) from the upper part to the lower part in the vertical direction. At this time, the fixings pass through the 2-2 panel holes 432 and contact the surface of the first panel 420 (there is no corresponding hole formed in the first panel 420).

[0056] As mentioned above, the lower end of the column bed 320 is clamped and coupled to the second panel 430 and supported. However, since it is not coupled with a separate fixing piece, but is clamped and coupled in the groove, if the sewing operation continues, a portion of the column bed 320 is distorted along the length direction and tilted. In this case, poor sewing quality will result. At this time, if the fixing piece is selectively inserted into multiple 2-2 panel holes 432 and tightened, the second panel 430 can be adjusted to be partially tilted based on the first panel 420, so that such skewness can be corrected. For example, the principle is as follows: Figure 7 Assuming that the column bed 320 is tilted partially to the left in the longitudinal direction, the operator only needs to insert the fixings into the two 2-2 panel holes 432 on the right side among the multiple 2-2 panel holes 432 and tighten them. This can fine-tune the second panel 430 in the corresponding position so that the portion thereof is in close contact with the first panel 420, thereby restoring the column bed 320 to its original vertical position.

[0057] Reference Figure 8 and Figure 9 , the mechanism of providing rotational power to the first belt 330 is described. Figure 8 is a diagram showing the structure of the connecting portion 500, Figure 9 2 is a diagram showing the configuration of the transmission unit 600 .

[0058] First, refer to Figure 8 , the connection part 500 will be described. The connection part 500 includes: a main motor 510, a main pulley 520, a first pulley 530, a first shaft 540, a second pulley 550, a third pulley 560, a second shaft 570 and a fourth pulley 580.

[0059] The main motor 510 is located in a portion of the shelf 100 and generates rotational power. A main pulley 520 is coupled to the main motor 510's rotating shaft, along which the lower portion of a main belt 521 is wound. Furthermore, the upper portion of the main belt 521 is wound around a first pulley 530, which is vertically spaced a predetermined distance above the main pulley 520. Therefore, the rotational power generated by the main motor 510 is transmitted to the first pulley 530 via the main pulley 520 and the main belt 521.

[0060] A first shaft 540 extending longitudinally is coupled to the first pulley 530. A needle 1000 is coupled to the front end of the first shaft 540. The rotational force of the first shaft 540 is transmitted and converted to the needle 1000, causing the needle 1000 to perform a vertical reciprocating motion. The conversion of rotational motion into vertical reciprocating motion can be accomplished using various components and is not limited to a single configuration.

[0061] At this time, a second pulley 550 is coupled to a portion of the first shaft 540. Specifically, the first shaft 540 is coupled to the second pulley 550 in a manner such that the first shaft 540 passes through the second pulley 550. Furthermore, the upper portion of the second belt 551 is coupled to the second pulley 550 so as to wrap around the second pulley 550, and the lower portion of the second belt 551 is coupled to the third pulley 560 so as to wrap around the third pulley 560.

[0062] The third pulley 560 is spaced a predetermined distance vertically from the second pulley 550 and is positioned below it. Furthermore, a second shaft 570 extending in the longitudinal direction is inserted and coupled to the third pulley 560. The front end of the second shaft 570 is inserted and coupled to the fourth pulley 580. Furthermore, the upper portion of the third belt 581 is attached to the fourth pulley 580 so as to wrap around it.

[0063] Through the structure described above, the rotational power generated in the main motor 510 is transmitted to the third belt 581 via the main pulley 520, the main belt 521, the first pulley 530, the first shaft 540, the second pulley 550, the second belt 551, the third pulley 560, the second shaft 570, and the fourth pulley 580 in sequence. At the same time, using one power source (main motor), not only the power for lifting and lowering the bobbin joint 300 can be transmitted, but also the power for making the needle 1000 move back and forth. Therefore, it has the following advantages: improved economy and production efficiency, and reduced volume.

[0064] Next, refer to Figure 9 , the structure of the transmission part 600 is described.

[0065] The transmission unit 600 includes an auxiliary pulley 610 , a gear 620 , a shaft 630 , a gear support frame 640 , and a pulley 650 .

[0066] The auxiliary pulley 610 is spaced apart from the fourth pulley 580 by a predetermined distance in the vertical direction and is located below the fourth pulley 580. The lower portion of the third belt 581 is wound around the auxiliary pulley 610 and transmits rotational power to the auxiliary pulley 610.

[0067] For example, gear 620 may be configured such that a first gear 621 and a second gear 622 face each other in a vertically meshed configuration (e.g., helical gears). Gear 620 is located between a pair of gear support frames 640 spaced apart longitudinally at a predetermined distance. The shaft extending through first gear 621 is supported by the upper portion of gear support frames 640 and extends through auxiliary pulley 610. The shaft extending through second gear 622 is supported by the lower portion of gear support frames 640 and extends toward shaft 630. Therefore, the rotational power transmitted by third belt 581 is transmitted to shaft 630 via auxiliary pulley 610, first gear 621, and second gear 622.

[0068] The shaft 630 is formed to extend in the longitudinal direction, and a pulley 650 is coupled to the front end of the shaft 630. The lower portion of the first belt 330 is coupled to the pulley 650 so as to wrap around the pulley 650. Therefore, the rotational power transmitted to the shaft 630 is ultimately transmitted to the shuttle through the pulley 650 and the first belt 330 as described above.

[0069] Next, a description will be given of a power transmission structure for reciprocating the support table 200 in the longitudinal direction and a mechanism for adjusting the position in the width direction. Figure 10 and Figure 11 1 is a diagram showing the configuration of the support device adjustment unit 700 , the guide unit 800 , and the drive unit 900 .

[0070] The workpiece placed on the support table 200 is changed in position in the longitudinal direction by the support table 200 reciprocating in the longitudinal direction, and accordingly, the needle 1000 reciprocating in the vertical direction sequentially sews the workpiece.

[0071] The support platform 200 includes a first support platform 220 formed by bending and extending behind the main body where the slit 210 is formed, and a second support platform 230 coupled to the rear of the first support platform 220 .

[0072] Figure 15 This is an enlarged view of the vicinity of the second support platform. The second support platform 230 is bent into a "∟" shape, with the bottom surface 231 fastened to the second guide member 820, and the bent rear surface 232 fastened to the first guide member 810. The first guide member 810 has a predetermined height in the vertical direction and is formed to extend in the longitudinal direction so as to contact the adjustment push rod 760 described later. A guide rail-shaped track is formed on the front surface of the first guide member 810, and the bent rear surface 232 of the second support platform 230 is fastened to the track and slides, and moves in the longitudinal direction. In addition, the second guide member 820 is also formed to extend in the longitudinal direction and is formed as a pair, and is respectively located on the front surface and rear surface of the drive belt 940 described later. The second support platform 230 is fastened to the second guide 820 and slides, and moves in the longitudinal direction. In more detail, the bottom surface 231 of the second support platform 230 is preferably coupled to a separate bracket 240, which is fastened to the second guide member 820 and slides. Preferably, the separate bracket 240 is formed with a pair of guide rails 241 extending in the width direction and spaced apart in the length direction at a predetermined distance, and the bottom surface 231 of the second support platform 230 is slidable along the guide rails 241. As will be described later, the widthwise position of the support platform 200 can be adjusted by adjusting the push rod 760.

[0073] Furthermore, the drive belt 940 is located below the individual bracket 240. By fastening the individual bracket 240 and the drive belt 940, the individual bracket moves in conjunction with the longitudinal movement of the drive belt 940. Therefore, the longitudinal movement of the drive belt 940 sequentially connects the individual bracket 240, the second support platform 230, the first support platform 220, and the support platform 200, enabling the entire support platform 200 to reciprocate in the longitudinal direction. Ultimately, the support platform 200 can be adjusted in its width while simultaneously reciprocating in the longitudinal direction.

[0074] The driving unit 900 includes a driving motor 910 , a driving shaft 920 , a driving pulley 930 , and a driving belt 940 .

[0075] The drive motor 910 is located at a portion of the shelf portion 100 and is coupled to a drive shaft 920 extending in the width direction. A drive pulley 930 is coupled to the front end of the drive shaft 920, and a drive belt 940 is wrapped around the drive pulley 930. Therefore, the rotational power generated by the drive motor 910 is transmitted to the drive shaft 920, the drive pulley 930, and the drive belt 940. As a result, the drive belt 940 rotates in the longitudinal direction, and the separate bracket 240 coupled to the drive belt 940 also moves in the longitudinal direction, allowing the entire support platform portion 200 coupled to the separate bracket 240 to move in the longitudinal direction.

[0076] The support frame adjustment portion 700 includes an adjustment motor 710 , an adjustment shaft 720 , a first adjustment pulley 730 , an adjustment belt 740 , an adjustment connector 750 , and an adjustment push rod 760 .

[0077] The adjustment motor 710 is located in a portion of the shelf portion 100. An adjustment shaft 720 extending in the longitudinal direction is coupled to the adjustment motor 710 and transmits rotational power. A pair of first adjustment pulleys 730 are coupled to one end and the other end of the adjustment shaft 720 in the width direction. Furthermore, each first adjustment pulley 730 is formed into a pair and is spaced apart from each other at a predetermined interval in the width direction. An adjustment belt 740 is formed, which wraps around the pair of first adjustment pulleys 730 spaced apart in the width direction, based on any one of the first adjustment pulleys 730.

[0078] The adjustment belt 740, which forms a track, has an adjustment connector 750 attached to its lower portion, through which the belt 740 passes. Furthermore, an adjustment push rod 760, extending in the width direction, is attached to the lower portion of the adjustment connector 750. Therefore, the widthwise position of the adjustment push rod 760 is adjusted by the rotational direction of the adjustment belt 740. For example, when the adjustment belt 740 rotates clockwise, the adjustment push rod 760 moves rearward in the widthwise direction, while when it rotates counterclockwise, the adjustment push rod 760 moves in the opposite direction.

[0079] At this time, the front end of the adjusting push rod 760 contacts the aforementioned first guide member 810 . When the adjusting push rod 760 moves forward in the width direction, the adjusting push rod 760 pushes the first guide member 810 forward in the width direction.

[0080] At this time, the second support platform 230 coupled to the first guide member 810 also moves forward in the width direction. This is because, as previously described, the second support platform 230 is fastened so as to be able to slide and move along the guide rails 241 formed on the separate bracket 240. Furthermore, as the second support platform 230 moves forward in the width direction, the entire position of the support platform 200 coupled to the second support platform 230 moves forward in the width direction, and the width position of the workpiece loaded on the support platform 200 changes, thereby enabling the position of the workpiece to be adjusted appropriately according to its size and the work environment.

[0081] As a result, in the present invention, the vertical positions of the bobbin and the shuttle, and the widthwise position of the support platform 200 for loading the workpiece can be adjusted, thereby improving production efficiency and operation speed and improving sewing quality.

[0082] While the above detailed description of the present invention has been provided with reference to preferred embodiments thereof, it should be understood that various modifications and variations can be made by those skilled in the art without departing from the scope of the present invention and the technical field as described in the appended claims. Therefore, the technical scope of the present invention is not limited to the contents described in the specification but is defined by the appended claims.

Claims

1. A sewing device for easily sewing a bent portion, wherein: include: Shelf, A support platform is located in front of the shelf portion and can reciprocate along the length direction, and the workpiece is placed on the support platform, and The bobbin coupling portion is located at the lower portion of the support platform and extends in the vertical direction; A slit extending along the length direction is formed on the support platform; The bobbin coupling portion can be adjusted in a vertical direction so that an upper end portion of the bobbin coupling portion can protrude toward an upper portion of the slit.

2. The sewing device for easily sewing a bent portion according to claim 1, wherein: The bobbin coupling portion comprises: The head houses the bobbin and the shuttle. The column bed is formed by extending downwardly from the head in the vertical direction. The first belt is combined with the head and the column bed to provide rotational power to the shuttle accommodated in the head, and A head hole is formed at an upper portion of the head, and a needle located at an upper portion of the bobbin coupling portion in a vertical direction passes through the head hole.

3. The sewing device for easily sewing a bent portion according to claim 2, wherein: Also included is a height adjustment portion located at a lower portion of the bobbin coupling portion in a vertical direction; The height adjustment unit includes: A pair of guides are formed so as to be spaced apart from each other at a predetermined interval in the longitudinal direction and to extend in the vertical direction. The first panel is in contact with the inner sides of the pair of guide members and can be raised and lowered in the vertical direction, and a second panel in contact with an upper portion of the first panel in a vertical direction; The lower end of the column bed is clamped into a groove that is recessed toward the rear surface of the second panel; The column bed rises and falls in the vertical direction in response to the rising and falling of the first panel and the second panel in the vertical direction.

4. The sewing device for easily sewing a bent portion according to claim 3, wherein: The pair of guide members are formed with a plurality of guide member slits extending in a vertical direction so as to face each other; A plurality of first panel holes are formed on both sides of the first panel, facing the plurality of guide slits respectively; A bolt is simultaneously passed through any one of the plurality of guide slits and any one of the plurality of first panel holes facing the slit to determine the vertical position of the first panel.

5. The sewing device for easily sewing a bent portion according to claim 4, wherein: Also includes: a transmission portion receiving rotational power from a main motor located at a portion of the shelf portion; The transmission part transmits rotational power to the shuttle.

6. The sewing device for easily sewing a bent portion according to claim 5, wherein: The transmission part includes: a shaft receiving rotational power from the main motor and located at a lower portion of the first panel in a vertical direction, and a pulley coupled to the front end portion of the shaft; The lower end portion of the first belt in the vertical direction is coupled to the pulley in a manner of wrapping the pulley; The rotational power transmitted from the main motor is transmitted to the shuttle via the pulley and the first belt.

7. The sewing device for easily sewing a bent portion according to claim 6, wherein: The support platform portion is capable of adjusting its position in the width direction.

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