Sewing cover folding guide and sewing machine

Abstract

The utility model provides a kind of sewing edge covering fold guide cylinder and sewing machine, including including sequentially and forming cloth guide passage cloth folding section, torsion section and cloth feeding section;Cloth folding section is formed flat cloth import away from the end of torsion section, and cloth folding section gradually bends along the center line from flat cloth import to torsion section, to make cloth guide passage form vertical fold cross section at the other end of cloth folding section;One end of torsion section is connected with vertical fold cross section, and the other end gradually twists and makes cloth guide passage form horizontal fold cross section;Cloth guide passage extends in cloth feeding section cross section and forms cloth exit fold mouth;Cloth feeding section is formed based on horizontal fold cross section and forms pinch, and pinch is used to guide the cloth to be covered edge to extend into the edge covering cloth strip between fold.This utility model provides sewing edge covering fold guide cylinder and sewing machine, can satisfy the wide edge covering process sewing operation demand of the size of edge covering being wider, overall structure integration degree is high, can reduce the difficulty of wide edge covering product processing, improve edge covering quality.

Description

Technical Field

[0001] This utility model belongs to the field of garment processing technology, specifically relating to a sewing edging folding guide tube and a sewing machine. Background Technology

[0002] In garment processing, the edges of clothes are typically treated with either rolled edges or bound edges. Rolled edges are made by rolling the fabric inwards and sewing it together, while bound edges involve folding a separate binding strip in half and then stitching it over the edge of the garment fabric. Both rolled and bound edges are mostly guided by a pull-type hemming tool. The difference is that rolled edges can be directly integrated into the sewing machine presser foot, while bound edges require a separate hemming tool to guide the folding of the binding strip, taking up more space on the sewing machine.

[0003] Currently, for special processes requiring wide binding widths, traditional hemming rollers need to be enlarged overall and require the use of an auxiliary roller to feed the edge of the fabric to be bound into the already folded binding strip. This not only restricts the sewing machine's operating space and increases the difficulty of the operation, but also fails to guarantee the binding quality. Therefore, there is an urgent need to develop sewing auxiliary tools specifically for wide binding processes. Utility Model Content

[0004] This utility model provides a sewing edging folding guide tube and sewing machine, which aims to improve the ease of operation and edging quality of wide-edging products.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Firstly, a sewing binding folding guide tube is provided, comprising a folding section, a twisting section, and a feeding section that are connected in sequence to form a guide cloth channel;

[0006] The end of the folded section away from the twisted section forms a flat fabric inlet. The flat fabric inlet is suitable for the flattened binding strip to enter the guide fabric channel. The folded section gradually bends along its centerline from the flat fabric inlet to the twisted section so that the guide fabric channel forms a vertical folded section at the other end of the folded section.

[0007] One end of the twisting section is connected to the vertical folded section, and the other end is gradually twisted to form a horizontal folded section in the guide fabric channel; one end of the feeding section is connected to the horizontal folded section, and the other end is used to align the sewing stitches; the guide fabric channel extends at the same cross section in the feeding section and forms the fabric exit fold.

[0008] The fabric feeding section forms a channel based on the horizontal folded section. The channel is used to guide the fabric to be bound into the binding strip between the folded edge of the fabric exiting the fabric fold and passing through the fabric guide channel.

[0009] In conjunction with the first aspect, in one possible implementation, a first air pipe is provided at the bend of the folded section near the twist section. The first air pipe is connected to the guide cloth channel and is used to blow air at an angle toward the twist section.

[0010] In some embodiments, the torsion section is provided with a plurality of first exhaust holes along its two side edges.

[0011] For example, a second air pipe is provided at the bend of the fabric feeding section near the twisting section. The second air pipe is connected to the fabric guide channel and is used to blow air at an angle toward the fabric outlet fold.

[0012] For example, the fabric feeding section has several second exhaust holes arranged along its two side edges.

[0013] In one possible implementation, the end of the fabric feeding section away from the fabric exit fold has a curved transition section, which is connected to the twisting section; wherein, the upper edge of the curved transition section has a first extended surface and the lower edge has a second extended surface, and an outward flare is formed between the first extended surface and the second extended surface, which is used to guide the fabric to be bound into the channel.

[0014] In some embodiments, a third exhaust hole communicating with the guide cloth channel is provided on both the first and second outer surfaces. The third exhaust hole is used to guide the airflow towards the outward expansion port.

[0015] For example, the end of the fabric feed section that forms the fabric fold is provided with a relief groove, which is used for the sewing machine presser foot to extend into.

[0016] For example, the end of the folded fabric section away from the twisting section is provided with an inlet section. One end of the inlet section is connected to the flat fabric inlet, and gradually increases from the flat fabric inlet to the other end to form an inlet.

[0017] The beneficial effects of the sewing binding folding guide tube provided by this utility model are as follows: Compared with the prior art, in this sewing binding folding guide tube, the binding strip enters the guide channel from the flat fabric inlet. During the process of passing through the folding section, it gradually bends along the center line of the folding section from a flat state to form a vertical fold. After the binding strip passes through the folding section and forms a vertical fold, it is gradually transformed into a horizontal fold under the guidance of the twisting section and enters the feeding section. The guide channel always maintains the same horizontal folding section and extends to the sewing machine pin position. At the same time, the clamp formed between the two folding parts of the horizontal folding section in the feeding section can guide the edge of the fabric to be bound to extend into the two folds of the folded binding strip. Thus, the fabric to be bound passes through the clamp and directly enters the two folds of the binding strip fed out from the fabric outlet, thereby forming a state in which the binding strip clamps the edge of the fabric and is directly fed into the sewing needle position for sewing.

[0018] Because the binding strip enters the guide channel in a flat state and its middle section always overlaps the guide channel at the bend center line of the folding section, it avoids vertical wrinkles that occur when folding wider binding strips, thus ensuring the accuracy of the folding position. After folding, the twisting section gradually twists the vertically folded binding strip into a horizontally folded state, preparing it for sewing. Furthermore, the feeding section creates a binding strip that wraps around the edge of the fabric to be bound at the folded edge. This not only meets the sewing needs of wide binding processes but also boasts a high degree of overall structural integration, completing the folding and wrapping process in one go. This reduces installation and operating space, lowers the processing difficulty of wide binding products, and improves binding quality.

[0019] Secondly, this utility model embodiment also provides a sewing machine, including the above-mentioned sewing and binding folding guide tube.

[0020] The beneficial effects of the sewing machine provided by this utility model are as follows: Compared with the prior art, the sewing machine of this utility model adopts the above-mentioned sewing and binding folding guide tube, which can not only meet the sewing operation requirements of wide binding process with a wide binding size, but also has a high degree of overall structural integration, and can complete the folding and clamping process in one go, which helps to reduce the installation and operation space, reduce the processing difficulty of wide binding products, and improve the binding quality. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of the sewing and binding folding guide tube provided in an embodiment of this utility model;

[0022] Figure 2 A top view of the sewing and binding folding guide tube provided in an embodiment of this utility model;

[0023] Figure 3 For along Figure 2 Schematic diagram of the cross-sectional structure of the middle AA line;

[0024] Figure 4 For along Figure 2 Schematic diagram of the cross-sectional structure of the BB line;

[0025] Figure 5 For along Figure 2 Schematic diagram of the cross-sectional structure of the CC line;

[0026] Figure 6 For along Figure 2 Schematic diagram of the cross-sectional structure of the DD line;

[0027] Figure 7 For along Figure 2 A schematic diagram of the cross-sectional structure of the EE line (including the binding strip and the fabric to be bound).

[0028] Figure 8 For along Figure 2 Schematic diagram of the cross-sectional structure of the FF line.

[0029] In the diagram: 100, guide channel; 10, folding section; 11, flat fabric inlet; 12, guide section; 121, inlet; 20, twisting section; 21, first air pipe; 22, first exhaust hole; 30, fabric feeding section; 31, fabric outlet fold; 32, clamping channel; 33, second air pipe; 34, second exhaust hole; 35, curved transition section; 351, first outer extension surface; 352, second outer extension surface; 353, outward flare; 354, third exhaust hole; 36, clearance groove; 37, connecting plate; 40, binding strip; 50, fabric to be bound. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "front," "rear," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0032] Please refer to the following: Figures 1 to 8 The sewing binding folding guide tube provided by this utility model will now be described. The sewing binding folding guide tube includes a folding section 10, a twisting section 20 and a feeding section 30 that are connected in sequence to form a guide channel 100.

[0033] It should be noted that the junctions of the folding section 10, the twisting section 20, and the feeding section 30 are all smoothly transitioned to ensure the overall smoothness of the guide channel 100.

[0034] The end of the folded section 10 away from the twisted section 20 forms a flat fabric inlet 11. The flat fabric inlet 11 is suitable for the flattened binding strip 40 to enter the guide channel 100. The folded section 10 gradually bends along its centerline from the flat fabric inlet 11 to the twisted section 20 so that the guide channel 100 forms a vertical folded section at the other end of the folded section 10.

[0035] It should be noted that the flat fabric inlet 11 here can be understood as a flat opening suitable for the binding fabric strip 40 to enter the guide channel 100 in an unfolded, flat state. Considering the smooth passage of the binding fabric strip 40, the dimensions of the flat fabric inlet 11 in the width and height directions can be set to be approximately 0.5mm larger than the width and thickness of the binding fabric strip 40.

[0036] The centerline of the folded fabric section 10 refers to the central axis in its width direction. The folded fabric section 10 is gradually folded along the centerline from a flat state. Specifically, the folded fabric section 10 is gradually bent downwards at the parts on both sides of the centerline, so that the cross-section of the guide channel 100 forms an inverted U-shape, that is, a vertically folded cross-section.

[0037] One end of the twisting section 20 is connected to the vertical folded section, and the other end is gradually twisted to make the guide channel 100 form a horizontal folded section; one end of the feeding section 30 is connected to the horizontal folded section, and the other end is used to align the sewing stitches. The guide channel 100 extends at the same cross section of the feeding section 30 and forms the fabric exit fold 31.

[0038] It should be noted that the twisting section 20 can be understood structurally as gradually twisting it from an inverted U-shape to a side U-shape by 90 degrees. In this way, the binding strip 40 can change from a vertically folded state to a horizontally folded state, preparing it to directly enter the sewing stitch.

[0039] The fabric feeding section 30 forms a channel 32 based on the horizontal folded section. The channel 32 is used to guide the fabric 50 to be bound into the binding strip 40 folded by the guide channel 100 at the fabric exit fold 31.

[0040] The main function of the feed section 30 is to improve the stability of the horizontal folded state of the binding strip 40, and to use the clamping channel 32 to introduce the edge of the fabric 50 to be bound, so that the binding strip 40 is discharged from the fold opening 31 in a horizontal folded state and directly clamped to the edge of the fabric 50 to be bound and enters the sewing stitch.

[0041] It should be understood that the sewing needle refers to the position where the sewing needle of the sewing machine passes through the sewing presser foot, which is also the position of the seam line formed after the fabric is sewn together. After the binding strip 40 is discharged from the fabric fold 31 and clamps the edge of the fabric, it can directly enter the sewing needle for sewing, avoiding the distance between the fabric fold 31 and the sewing needle being too far, which would cause misalignment between the binding strip 40 and the fabric and affect the accuracy of the binding position.

[0042] A connecting plate 37 can be installed on one side of the fabric feeding section 30 to be fixed to the sewing machine panel. The connecting plate 37 is provided with through holes, and fasteners such as screws pass through the through holes and are screwed to the threaded holes on the sewing machine panel for fixation.

[0043] It should be explained that the wider binding strip 40 is usually rolled up on a roller and gradually unrolled into the guide channel 100. Since the binding strip 40 is flattened or laid flat after unrolling, it needs to be folded and cannot be directly folded into the guide channel 100.

[0044] The working method of the sewing binding folding guide tube provided in this embodiment is as follows: For the wide binding process requirements with a width of more than two centimeters, the binding fabric strip 40 enters the guide channel 100 from the flat fabric inlet 11. During the process of passing through the folding section 10, it gradually bends along the center line of the folding section 10 from a flat state to form a vertical fold. After the binding fabric strip 40 forms a vertical fold after passing through the folding section 10, it gradually changes from a vertical fold to a horizontal fold under the guidance of the twisting section 20 and enters the feeding section 30. The guide channel 100 feeds the fabric... Section 30 always extends to the sewing machine pin position while maintaining consistency with the horizontal folded section. At the same time, the channel 32 formed between the two folded parts of the horizontal folded section by the feeding section 30 can guide the edge of the fabric 50 to be bound into the two folded edges of the bounding strip 40. Thus, after the fabric 50 to be bound passes through the channel 32, it directly enters the two folded edges of the bounding strip 40 fed out by the fabric exit fold 31, thereby forming the state in which the bounding strip 40 clamps the edge of the fabric and is directly fed into the sewing needle position for sewing.

[0045] Compared with the prior art, the sewing binding folding guide tube provided in this embodiment allows the binding strip 40 to enter the guide channel 100 in a flat state, with its middle section always overlapping the guide channel 100 at the bending center line of the folding section 10. This avoids vertical wrinkles in the binding strip 40 during folding, thus ensuring the accuracy of the folding position. After folding, the twisting section 20 gradually twists the vertically folded binding strip 40 into a horizontally folded state, preparing it for sewing. On this basis, the feeding section 30 can form the binding strip 40 clamping the edge of the fabric 50 to be bound at the exit fold 31. This not only meets the sewing needs of wide binding processes with larger binding dimensions, but also has a high degree of overall structural integration, enabling the folding and clamping processes to be completed in one go. This helps reduce installation and operating space, lowers the processing difficulty of wide binding products, and improves binding quality.

[0046] In some embodiments, see Figure 2 and Figure 5The folded fabric section 10 is provided with a first air pipe 21 near the bend of the twist section 20. The first air pipe 21 is connected to the guide fabric channel 100 and is used to blow air at an angle toward the twist section 20. The first air pipe 21 is connected to an air source to blow air into the guide fabric channel 100. Since the first air pipe 21 is located at the bend of the folded fabric section 10, i.e., the center line, the airflow enters the guide fabric channel 100 and blows towards both sides of the bend line of the binding fabric strip 40, thereby preventing the binding fabric strip 40 from wrinkling during its passage through the guide fabric channel 100. Simultaneously, the airflow direction is at an angle from the folded fabric section 10 toward the twist section 20, which not only provides a certain pushing effect on the binding fabric strip 40, facilitating its smooth entry into the twist section 20, but also prevents wrinkles from forming during the twisting process, thus improving the folding effect of the binding fabric strip 40.

[0047] Specifically, such as Figure 5 As shown, the aforementioned torsion section 20 is provided with a plurality of first exhaust holes 22 along its two side edges. By providing the first exhaust holes 22, it is possible to avoid the formation of high air pressure due to the untimely discharge of airflow in the guide channel 100, which would cause the binding strip 40 to stick tightly to the inner wall of the guide channel 100 under air pressure and affect its smooth movement.

[0048] For some possible implementations, please refer to [link / reference]. Figure 2 , Figure 6 and Figure 7 The fabric feeding section 30 is provided with a second air pipe 33 near the bend of the twisting section 20. The second air pipe 33 is connected to the fabric guiding channel 100 and is used to blow air at an angle toward the fabric outlet fold 31.

[0049] Considering that the fabric guide channel 100 has a horizontal folded cross section in the fabric feeding section 30, a second air pipe 33 is provided to blow air into the fabric guide channel 100 from the bent part of the fabric feeding section 30. This airflow flattens the binding fabric strip 40 on both sides of its bend line. At the same time, since the airflow is inclined towards the fabric exit fold 31, it also pushes the binding fabric strip 40. This avoids wrinkles on the binding fabric strip 40 during its passage through the fabric feeding section 30, thus ensuring the folded forming effect of the binding fabric strip 40.

[0050] Specifically, such as Figure 7 As shown, the fabric feeding section 30 is provided with a plurality of second vent holes 34 along its two side edges. By providing the second vent holes 34, high air pressure can be avoided in the fabric feeding section 30, which would increase the resistance to the passage of the binding fabric strip 40, thus ensuring the smooth passage of the binding fabric strip 40 through the fabric feeding section 30.

[0051] In some embodiments, combined with Figure 2 and Figure 6It is understood that the end of the fabric feeding section 30 away from the fabric outlet fold 31 has a curved transition portion 35, which is connected to the twisting section 20; wherein, the upper edge of the curved transition portion 35 has a first outer extension surface 351 and the lower edge has a second outer extension surface 352, and an outward flare 353 is formed between the first outer extension surface 351 and the second outer extension surface 352, which is used to guide the fabric 50 to be bound into the channel 32.

[0052] By setting the curved transition section 35, the folded section 10 and the twisted section 20 can be deflected to the side area of ​​the sewing machine presser foot, thereby freeing up more operating space. The first outer extension surface 351 and the second outer extension surface 352 set on the upper and lower edges of the curved transition section 35 form an outward flare 353, which allows the edge of the fabric 50 to be hemmed to easily enter the guideway 32 through the outward flare 353, which not only reduces the difficulty of operation, but also improves the smoothness of fabric feeding into the guideway 32.

[0053] It should be noted that you should refer to [link / reference]. Figure 6 The first outer surface 351 and the second outer surface 352 are each provided with a third exhaust hole 354 that communicates with the guide channel 100. The third exhaust hole 354 is used to guide the airflow towards the outward flare 353. By providing the third exhaust hole 354, the airflow in the guide channel 100 can be blown towards the outward flare 353 through the third exhaust hole 354, thereby flattening the fabric 50 to be bound, avoiding wrinkles in the fabric 50 to be bound within the clamping channel 32, which would affect the binding position accuracy of the binding strip 40 on the edge of the fabric, and thus improving the binding quality.

[0054] To ensure that the fabric fold 31 is as close as possible to the sewing stitch, the binding strip 40 can be sewn promptly after clamping the edge of the fabric 50 to be bound, thereby avoiding the problem of misalignment of the binding strip 40 affecting the accuracy of the sewing position. Figure 1 As shown, the fabric feeding section 30 has a relief groove 36 at one end forming the fabric fold 31, which is used for the sewing machine presser foot to extend into.

[0055] It should be noted that in some embodiments, please refer to [the relevant documentation / reference]. Figure 1 and Figure 8 The folded section 10 has an inlet section 12 at the end furthest from the twist section 20. One end of the inlet section 12 is connected to the flat fabric inlet 11, and gradually increases in size from the flat fabric inlet 11 to the other end to form an inlet 121. By setting the inlet section 12, the binding fabric strip 40, which is laid flat after being unrolled from the fabric roll, can easily enter the flat fabric inlet 11. This not only facilitates the initial operation of threading the binding fabric strip 40 into the guide fabric channel 100, but also reduces the wear and scratches on the binding fabric strip 40 by the edge of the flat fabric inlet 11, thereby protecting the binding fabric strip 40.

[0056] Based on the same inventive concept, this application also provides a sewing machine including the above-mentioned sewing and binding folding guide tube.

[0057] Compared with the prior art, the sewing machine provided in this embodiment adopts the above-mentioned sewing binding folding guide tube. The binding strip 40 enters the guide channel 100 in a flat state, and the middle part can always overlap the guide channel 100 at the bending center line of the folding section 10. Therefore, it can avoid the problem of vertical wrinkles in the folding process of the wider binding strip 40, thus ensuring the folding position accuracy of the binding strip 40. After the folding is completed, the twisting section 20 is used to gradually twist the vertically folded binding strip 40 into a horizontally folded state, thus preparing for sewing the binding strip 40. On this basis, the feeding section 30 can form the binding strip 40 clamping the edge of the fabric 50 to be bound at the exit fold 31 position. This not only meets the sewing operation requirements of wide binding processes with wider binding dimensions, but also has a high degree of overall structural integration, which can complete the folding and clamping process in one go. It is beneficial to reduce the installation and operation space, reduce the processing difficulty of wide binding products, and improve the binding quality.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sewn-edge folded guide tube, characterized in that, It includes a folding section, a twisting section, and a feeding section that are connected in sequence to form a guide channel; The end of the folded section away from the twisted section forms a flat fabric inlet, which is suitable for the flattened binding strip to enter the guide channel. The folded section gradually bends along its centerline from the flat fabric inlet to the twisted section so that the guide channel forms a vertical folded section at the other end of the folded section. One end of the twisting section is connected to the vertical folded section, and the other end is gradually twisted to form a horizontal folded section of the guide channel; one end of the feeding section is connected to the horizontal folded section, and the other end is used to align the sewing stitches; the guide channel extends through the same section of the feeding section to form a fabric exit fold. The feeding section forms a channel based on the horizontal folded section, and the channel is used to guide the fabric to be bound into the binding strip between the folded edge strips that have passed through the guide channel at the fabric exit fold.

2. The sewing and binding folding guide tube as described in claim 1, characterized in that, The folded section is provided with a first air pipe near the bend of the twist section. The first air pipe is connected to the guide cloth channel and is used to blow air at an angle toward the twist section.

3. The sewing and binding folding guide tube as described in claim 2, characterized in that, The torsion section is provided with several first exhaust holes along its two side edges.

4. The sewing and binding folding guide tube as described in claim 1, characterized in that, A second air pipe is provided on the bending part of the fabric feeding section near the twisting section. The second air pipe is connected to the fabric guiding channel and is used to blow air at an angle toward the fabric outlet fold.

5. The sewing and binding folding guide tube as described in claim 4, characterized in that, The fabric feeding section is provided with several second exhaust holes along its two side edges.

6. The sewing and binding folding guide tube as described in claim 4, characterized in that, The end of the fabric feeding section away from the fabric outlet fold has a curved transition portion, which is connected to the twisting section; wherein, the upper edge of the curved transition portion has a first outer extension surface and the lower edge has a second outer extension surface, and an outward flare is formed between the first outer extension surface and the second outer extension surface, which is used to guide the fabric to be bound into the channel.

7. The sewing and binding folding guide tube as described in claim 6, characterized in that, Both the first and second outer surfaces are provided with a third exhaust hole that communicates with the guide cloth channel. The third exhaust hole is used to guide the airflow toward the outer flare.

8. The sewing binding folding guide tube as described in any one of claims 1-7, characterized in that, The fabric feeding section has a relief groove at one end forming the fabric exit fold, which is used for the sewing machine presser foot to extend into.

9. The sewing binding folding guide tube as described in any one of claims 1-7, characterized in that, The folded section is provided with an inlet section at one end away from the twisted section. One end of the inlet section is connected to the flat fabric inlet, and gradually increases in size from the flat fabric inlet to the other end to form an inlet.

10. A sewing machine, characterized in that, Includes the sewing binding folding guide tube as described in any one of claims 1-9.

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