Flexible fabric conveying mechanism of overedger

Abstract

The utility model discloses a flexible fabric conveying mechanism of an overedger, which is characterized by comprising a vertical plate, a support plate arranged below the vertical plate, three edge pressing conveying belts arranged on the front side of the vertical plate and a driving mechanism for driving the three edge pressing conveying belts to synchronously drive, and the three edge pressing conveying belts are arranged at intervals from front to back. A longitudinal interval is formed between every two adjacent edge pressing conveying belts, and the bottom surfaces of the three edge pressing conveying belts abut against the supporting plate; a plurality of transmission wheels are rotationally installed on the front side of the vertical plate, and each edge pressing conveying belt is arranged on at least two transmission wheels in a winding mode. According to the utility model, the hemming precision and quality are improved.

Description

Technical Field

[0001] The utility model relates to an overlock sewing machine, in particular to a flexible fabric conveying mechanism of the overlock sewing machine. Background Art

[0002] Towels are usually a rectangular piece of cloth structure, which is usually woven with warp and weft threads. It is a kind of cloth with good water absorption performance. During the production process, several small rectangular pieces of uniform size are evenly cut from the whole piece of cloth. The burrs of these semi-finished rectangular cloths need to be processed by a sewing machine to increase the service life and appearance of the finished towels.

[0003] In the prior art, the patent previously applied for by the applicant has the application number: 202310108075.0, and the patent name is: a split combined ultra-fine sewing device. During the sewing process, the fabric is transported by a belt, and another belt presses the edge of the fabric (the belt is pressed on the inner side of the sewing place). The fabric is driven to move by the conveyor belt, and sewing and thread cutting are realized during the movement of the fabric.

[0004] However, this structure has the following shortcomings:

[0005] 1. Since the fabric is flexible, it is easy to wrinkle during the belt conveying process. The appearance of wrinkles will cause the fabric to be offset at the seam edge, resulting in poor or unqualified seam effect;

[0006] 2. Because it is a flexible fabric, it is easy to wrinkle, and the appearance of wrinkles will cause material blocking and affect the sewing effect;

[0007] 3. When the fabric is cut, a sensor is needed to detect the position of the fabric. Since the sensor can only be set on the side of the belt, the edge of the fabric will be deformed and the sensor cannot detect it, resulting in problems such as cutting too much or too little, which affects the appearance and quality of the product. Summary of the invention

[0008] The utility model aims to provide a flexible fabric conveying mechanism for an overlock sewing machine, which can effectively prevent wrinkles and material blockages from occurring during the sewing process of the flexible fabric, effectively improve conveying stability, and ensure sewing accuracy and quality.

[0009] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a flexible fabric conveying mechanism of an overlock sewing machine, comprising a vertical plate, a support plate arranged below the vertical plate, three edge pressing conveying belts arranged on the front side of the vertical plate, and a driving mechanism for driving the three edge pressing conveying belts to synchronously transmit.

[0010] The three edge pressing conveyor belts are arranged at intervals from front to back, and a longitudinal spacing is provided between adjacent edge pressing conveyor belts, and the bottom surfaces of the three edge pressing conveyor belts are against the support plate;

[0011] A plurality of transmission wheels are rotatably mounted on the front side of the vertical plate, and each of the edge pressing conveyor belts is wound around at least two of the transmission wheels.

[0012] In the above technical solution, the bottom surface of the edge pressing conveyor belt on the front side is arranged directly opposite to the seam edge of the flexible fabric;

[0013] The bottom surface of the edge pressing conveyor belt in the middle is arranged directly opposite to the rear end of the seam edge of the flexible fabric.

[0014] In the above technical solution, the edge pressing conveyor belt includes a first edge pressing conveyor belt, a second edge pressing conveyor belt and a third edge pressing conveyor belt which are arranged at intervals from front to rear;

[0015] The two ends of the bottom surface of the third edge pressing conveyor belt are respectively arranged close to the left and right sides of the vertical plate;

[0016] The left side of the bottom surface of the first edge pressing conveyor belt is arranged on the right side of the left end of the bottom surface of the third edge pressing conveyor belt, and the right side of the first edge pressing conveyor belt is arranged on the left side of the right end of the bottom surface of the third edge pressing conveyor belt;

[0017] The left side of the bottom surface of the second edge pressing conveyor belt is arranged between the left side and the right side of the bottom surface of the first edge pressing conveyor belt, and the right side of the bottom surface of the second edge pressing conveyor belt is arranged flush with the right side of the bottom surface of the third edge pressing conveyor belt.

[0018] In the above technical solution, the transmission wheel includes a first transmission wheel, a second transmission wheel, a third transmission wheel, a fourth transmission wheel and a fifth transmission wheel which are arranged at intervals from left to right;

[0019] The left end and the right end of the third edge pressing conveyor belt are respectively wound around the first transmission wheel and the fifth transmission wheel;

[0020] The left end and the right side of the first edge pressing conveyor belt are respectively wound around the second transmission wheel and the fourth transmission wheel;

[0021] The left end and the right end of the second edge pressing conveyor belt are respectively wound around the third transmission wheel and the fifth transmission wheel.

[0022] In the above technical solution, the lower inner surface of the third edge pressing conveyor belt abuts against the bottom surfaces of the third transmission wheel and the fourth transmission wheel;

[0023] The lower inner surface of the second edge pressing conveyor belt abuts against the bottom surface of the third transmission wheel.

[0024] In the above technical solution, a feed transmission wheel is also installed on the left side of the first transmission wheel, the feed transmission wheel is rotatably connected to the vertical plate via a bracket, the right end of the bracket is rotatably connected to the vertical plate, the feed transmission wheel is rotatably connected to the left side of the bracket, and the left end of the third edge pressing conveyor belt is wound around the left outer surface of the feed transmission wheel;

[0025] A driving member is also installed on the left side of the vertical plate, and the driving member drives the bracket to rotate around the vertical plate to raise or lower the bottom of the feed transmission wheel.

[0026] In the above technical solution, the driving mechanism is installed on the upper part of the vertical plate, and the driving mechanism includes a driving wheel and a motor. The motor is configured to drive the driving wheel to rotate, and the top of the three edge pressing conveyor belts are wound around the driving wheel.

[0027] In the above technical solution, a plurality of groups of pressing parts are provided on the front side surface of the vertical plate, and the plurality of groups of pressing parts are arranged at intervals from left to right. The bottom surface of the pressing parts is pressed against the inner surface corresponding to the bottom of the edge pressing conveyor belt, and the pressing parts press the bottom surface of the edge pressing conveyor belt against the top surface of the support plate.

[0028] In the above technical solution, a sensor is further provided, wherein the detection end of the sensor is arranged downward, and the detection end of the sensor is arranged directly opposite to the longitudinal spacing between the front side pressure conveyor belt and the middle side pressure conveyor belt.

[0029] In the above technical solution, a vertical slide rail and an adjusting member are also installed on the vertical plate, and the vertical slide rail is arranged parallel to the adjusting member.

[0030] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0031] 1. In the utility model, three edge pressing conveyor belts are arranged, the last edge pressing conveyor belt is used for conveying fabrics, the front edge pressing conveyor belt is used for limiting the position of the seam edge of the flexible fabric, and the middle edge pressing conveyor belt is used for limiting the side position of the seam edge of the flexible fabric, which can effectively prevent the flexible fabric from running off, effectively ensure the seam effect, and improve the qualified rate of the seam edge;

[0032] 2. The utility model sets three belts to limit the edges of the flexible fabric respectively, which can effectively prevent the fabric from wrinkling, not only ensuring the seam effect, but also preventing the material from blocking;

[0033] 3. In the process of fabric conveying, the utility model can prevent fabric from deflecting, effectively ensuring the sewing effect and quality;

[0034] 4. In the utility model, a sensor is arranged, and the sensor is arranged facing the seam edge of the fabric. It can detect the seam edge close to the flexible fabric, which can improve the detection accuracy, thereby ensuring that there will be no problem of over-cutting or under-cutting when the fabric is cut, thereby ensuring the aesthetics and qualified rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the local structure in the process of overlock conveying in the prior art;

[0036] Figure 2 It is a schematic diagram of the local structure during the overlock conveying process in the first embodiment of the utility model;

[0037] Figure 3 It is a schematic diagram of the structure of the first embodiment of the present utility model;

[0038] Figure 4 yes Figure 3 A partial enlarged view of the middle feed transmission wheel;

[0039] Figure 5 It is a schematic diagram of the three-dimensional structure in a viewing angle state in the first embodiment of the utility model;

[0040] Figure 6 yes Figure 5 A partial enlarged view of the

[0041] Figure 7 It is a schematic diagram of the three-dimensional structure in another viewing angle state of the first embodiment of the utility model;

[0042] Figure 8 yes Figure 7 A partial enlarged view of the

[0043] Fig. 9 It is a structural schematic diagram of a pressed piece in Embodiment 1 of the present utility model (the pressed piece is not provided with a connecting plate);

[0044] Fig.10 It is a structural schematic diagram of a pressed part in Embodiment 1 of the utility model (a connecting plate is provided on the pressed part).

[0045] Among them: 1. vertical plate; 2. support plate; 3. edge pressing conveyor belt; 4. transmission wheel; 5. first edge pressing conveyor belt; 6. second edge pressing conveyor belt; 7. third edge pressing conveyor belt; 8. first transmission wheel; 9. second transmission wheel; 10. third transmission wheel; 11. fourth transmission wheel; 12. fifth transmission wheel; 13. feeding transmission wheel; 14. bracket; 15. driving member; 16. driving wheel; 17. motor; 18. pressing member; 19. mounting frame; 20. pressing plate; 21. connecting rod; 22. extension plate; 23. elastic member; 24. connecting plate; 25. convex part; 26. vertical slide rail; 27. adjusting member; 31. flexible fabric; 32. seam edge;

[0046] 101. flexible fabric; 102. seam edge; 103. conveyor belt; 104. edge pressing belt; DETAILED DESCRIPTION

[0047] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0048] Example 1: See Figures 2 to 10 As shown, a flexible fabric conveying mechanism of an overlock sewing machine comprises a vertical plate 1, a support plate 2 arranged below the vertical plate 1, three edge pressing conveyor belts 3 arranged at the front side of the vertical plate 1, and a driving mechanism for driving the three edge pressing conveyor belts 3 to transmit synchronously.

[0049] The three edge pressing conveyor belts 3 are arranged at intervals from front to back, and a longitudinal spacing is provided between adjacent edge pressing conveyor belts 3, and the bottom surfaces of the three edge pressing conveyor belts 3 are against the support plate 2;

[0050] A plurality of transmission wheels 4 are rotatably mounted on the front side of the vertical plate 1 , and each of the edge pressing conveyor belts 3 is wound around at least two of the transmission wheels 4 .

[0051] In the prior art, see Figure 1As shown, it is a flexible fabric 101, the left and right sides of which have been sewn, the front and back sides are cut, and then sent to the overlock sewing machine for sewing. The front and back sides of the overlock sewing machine are provided with a conveying mechanism and an overlock sewing mechanism. The conveying mechanism conveys and presses the front and back sides of the flexible fabric, and the overlock sewing mechanism sews the front and back sides. Among them, taking the sewing of the front side of the flexible fabric as an example (both the front and back sides are overlocked), the front end of the flexible fabric is the seam edge 102, a belt will be at the rear end of the seam edge, and there is a large distance from the seam edge. The belt is a conveying belt 103, which is used for conveying the flexible fabric, and another belt is close to the seam edge, that is, the front side of the belt is flush with the seam edge, and the belt is a pressing belt 104, which is used for pressing the edge of the flexible fabric to ensure the quality of the seam edge. However, in this structure, since the seam edge is not limited, it can only be driven to move by the pressing belt and the conveying belt. Since the towel is a flexible fabric, wrinkles and offsets may occur at the seam edge, which will cause problems such as blocking and seam offset. At the same time, since the front end of the flexible fabric is the seam edge, a sensor will be set to facilitate the subsequent cutting of the thread ends. The sensor can only be set on the back side of the edge pressing belt, and the cutting point is at the corner of the flexible fabric (four corners). The corner may be to the left, right, front or back, and the sensor cannot detect the outermost edge of the corner, resulting in the problem of cutting too much or too little when cutting.

[0052] Therefore, in this embodiment, three edge pressing conveyor belts are provided, wherein the bottom surface of the front edge pressing conveyor belt is provided directly opposite to the seam edge 32 of the flexible fabric 31, and is used to press and limit the seam edge to prevent the seam edge from deviating; the bottom surface of the middle edge pressing conveyor belt is provided directly opposite to the rear end of the seam edge of the flexible fabric, and further prevents the seam edge of the flexible fabric from deviating on the basis of the front edge pressing conveyor belt limiting the seam edge of the flexible fabric. The bottom surface of the rear edge pressing conveyor belt is directly opposite to the edge of the flexible fabric, and is used to convey the flexible fabric.

[0053] See also Figures 3 to 8 As shown, the edge pressing conveyor belt 3 includes a first edge pressing conveyor belt 5, a second edge pressing conveyor belt 6 and a third edge pressing conveyor belt 7 which are arranged at intervals from front to back;

[0054] The two ends of the bottom surface of the third edge pressing conveyor belt 7 are respectively arranged close to the left and right sides of the vertical plate 1;

[0055] The left side of the bottom surface of the first edge pressing conveyor belt 5 is arranged on the right side of the left end of the bottom surface of the third edge pressing conveyor belt 7, and the right side of the first edge pressing conveyor belt 5 is arranged on the left side of the right end of the bottom surface of the third edge pressing conveyor belt 7;

[0056] The left side of the bottom surface of the second edge pressing conveyor belt 6 is arranged between the left and right sides of the bottom surface of the first edge pressing conveyor belt 5 , and the right side of the bottom surface of the second edge pressing conveyor belt 6 is arranged flush with the right side of the bottom surface of the third edge pressing conveyor belt 7 .

[0057] Among them, the bottom length of the first edge pressing conveyor belt will match the length of the flexible fabric, or be slightly longer than the length of the flexible fabric. During actual sewing, the side edge of the flexible fabric will first be conveyed to the right through the third edge pressing conveyor belt on the rear side. The third edge pressing conveyor belt presses the edge of the flexible fabric onto the support plate, and the flexible fabric is supported by the support plate. The right end of its seam edge is first sewn (continuous sewing). Just after the right end is sewn, the seam edge will enter between the first edge pressing conveyor belt and the support plate, and be limited by the first edge pressing conveyor belt. At the same time, since the three edge pressing conveyor belts move synchronously, the first edge pressing conveyor belt will also give the seam edge a driving force to the right synchronously, that is, the seam edge and the flexible fabric will be conveyed to the right synchronously, so that the flexible fabric can be prevented from being offset, especially the flexible fabric and the seam edge on the front side of the third conveyor belt, thereby ensuring the sewing accuracy and quality, ensuring the pass rate, and preventing blockage. When sewing is completed, the back side of the seam edge on the right side of the flexible fabric is pressed by the second edge pressing conveyor belt and transported to the right. In the process of transporting to the right, the excess thread ends will be cut off by the tangent mechanism. The existence of the second edge pressing conveyor belt can limit the edge of the seam edge of the flexible fabric to prevent the occurrence of skewed cutting and ensure the cutting quality.

[0058] See also Figures 3 to 8 As shown, the transmission wheel 4 includes a first transmission wheel 8, a second transmission wheel 9, a third transmission wheel 10, a fourth transmission wheel 11 and a fifth transmission wheel 12 which are arranged at intervals from left to right;

[0059] The left end and the right end of the third edge pressing conveyor belt 7 are respectively wound around the first transmission wheel 8 and the fifth transmission wheel 12;

[0060] The left end and the right side of the first edge pressing conveyor belt 5 are respectively wound around the second transmission wheel 9 and the fourth transmission wheel 11;

[0061] The left end and the right end of the second edge pressing conveyor belt 6 are respectively wound around the third transmission wheel 10 and the fifth transmission wheel 12 .

[0062] In this embodiment, there are other transmission wheels above the first transmission wheel, the second transmission wheel, the third transmission wheel, the fourth transmission wheel and the fifth transmission wheel for transmitting and tensioning the three edge pressing conveyor belts.

[0063] Wherein, the inner surface of the lower middle part of the third edge pressing conveyor belt abuts against the bottom surfaces of the third transmission wheel and the fourth transmission wheel;

[0064] The inner surface of the lower middle portion of the second edge pressing conveyor belt abuts against the bottom surface of the third transmission wheel.

[0065] In this way, the third transmission wheel and the fourth transmission wheel can be used to guide and drive the second edge pressing conveyor belt and the third edge pressing conveyor belt.

[0066] See also Figures 3 to 5 As shown, a feed transmission wheel 13 is also installed on the left side of the first transmission wheel 8, and the feed transmission wheel 13 is rotatably connected to the vertical plate 1 via a bracket 14, the right end of the bracket 14 is rotatably connected to the vertical plate 1, and the feed transmission wheel 13 is rotatably connected to the left side of the bracket 14, and the left end of the third edge pressing conveyor belt 7 is wound around the left outer surface of the feed transmission wheel 13;

[0067] A driving member 15 is also installed on the left side of the vertical plate 1, and the driving member 15 drives the bracket 14 to rotate around the vertical plate 1, so that the bottom of the feed transmission wheel 13 is raised or lowered. The driving member is a cylinder, the top of the cylinder is connected to the upper left side of the vertical plate, and the output shaft at the bottom of the cylinder is connected to the upper middle part or the upper left side of the bracket. The left end of the bracket is pushed downward or upward by extending and retracting the cylinder output shaft. When the flexible fabric needs to enter the conveying mechanism for sewing, the output shaft of the cylinder retracts, driving the feed drive wheel to move upward, which will drive the left bottom of the third edge pressing conveyor belt to move upward, so that there is a gap between the left bottom of the third edge pressing conveyor belt and the support plate, and the right end of the flexible fabric can enter between the third edge pressing conveyor belt and the support plate. After entering the inside, the output shaft of the cylinder extends, driving the left end of the third edge pressing conveyor belt to move downward, and the third edge pressing conveyor belt is used to press the flexible fabric onto the support plate, and then the driving mechanism drives all the edge pressing conveyor belts to work, so that the bottom surface of the edge pressing conveyor belt is transmitted to the right, thereby driving the flexible fabric to move to the right. Among them, a notch will be set on the support plate on the left side of the first edge pressing conveyor belt, and the sewing mechanism is at the notch. When the flexible fabric passes through the notch, the edge of the flexible fabric will be sewn by the sewing mechanism.

[0068] See also Figures 3 to 8 As shown, the driving mechanism is installed on the upper part of the vertical plate 1, and the driving mechanism includes a driving wheel 16 and a motor 17. The motor is configured to drive the driving wheel to rotate, and the upper part of the three edge pressing conveyor belts is wound around the driving wheel. In this way, when the motor drives the driving wheel to rotate, it will drive the three edge pressing belts to move synchronously at the same time, and the moving speed is the same, so that the moving speed of each position of the flexible fabric is the same, and the occurrence of wrinkles, offsets and other problems can be prevented.

[0069] See also Figures 3 to 10As shown, a plurality of groups of pressing members 18 are provided on the front side surface of the vertical plate 1, and the plurality of groups of pressing members 18 are arranged at intervals from left to right, and the bottom surface of the pressing members 18 is pressed against the inner surface corresponding to the bottom of the edge pressing conveyor belt 3, and the pressing members 18 press the bottom surface of the edge pressing conveyor belt 3 against the top surface of the support plate 2.

[0070] In this embodiment, the pressing member 18 includes a mounting frame 19, a pressing plate 20 and a connecting rod 21. The mounting frame 19 is mounted on the vertical plate 1. The top of the pressing plate 20 is connected to the mounting frame 19 via the connecting rod 21. The bottom surface of the pressing plate abuts against the inner surface of the bottom of the corresponding edge pressing conveyor belt 3.

[0071] The left side and the right side of the pressing plate 20 are respectively provided with extension plates 22 extending toward the corresponding side. The extension plates 22 are arranged obliquely upward from the end of the pressing plate 20 toward the corresponding side.

[0072] Furthermore, the top of the connecting rod is connected to the mounting frame for vertical movement, and an elastic member 23 is sleeved on the connecting rod 21, with the top of the elastic member resting on the bottom surface of the mounting frame, and the top resting on the top surface of the pressing plate, so that the pressing plate can move up and down, and adjust the spacing between the edge pressing conveyor belt and the support plate according to the thickness of the flexible fabric, to ensure that the flexible fabric can pass smoothly between the edge pressing conveyor belt and the support plate, and the flexible fabric is pressed during the conveying process. Among them, the inclined extension plate prevents the edge of the pressing plate and the inner surface of the edge pressing conveyor belt from scratching and causing damage, and ensures the smoothness of the edge pressing conveyor belt passing through the pressing plate. Preferably, the elastic member is a spring.

[0073] Among them, some or all of the pressing parts 18 also have a connecting plate 24, the bottom of the connecting rod 21 is connected to the top of the connecting plate 24, the bottom of the elastic member is against the connecting plate, and the top of the pressing plate is rotatably connected to the connecting plate via the convex portion 25. In this way, when the flexible fabric passes through this place, the pressing edge can rotate and deform relative to the connecting plate, thereby ensuring the smoothness and stability of the flexible fabric when passing through, and also ensuring that when the flexible fabric passes through the pressing edge conveyor belt at the pressing plate, the pressing edge conveyor belt is always in contact with the support plate and the flexible fabric, ensuring the compression of the flexible fabric and preventing wrinkles and offset problems.

[0074] In the present invention, a sensor (not shown in the figure) is further provided, wherein the detection end of the sensor is arranged downward, and the detection end of the sensor is arranged directly opposite to the longitudinal spacing between the front side pressure conveyor belt and the middle side pressure conveyor belt.

[0075] In this way, the sensor can detect whether the end of the seam edge is deflected inward, thereby ensuring the detection accuracy and cooperating with the cutting mechanism to ensure the trimming and tangent accuracy and quality of the end of the seam edge.

[0076] See also Figure 3, 5 As shown in Figures 7 and 8, a vertical slide rail 26 and an adjusting member 27 are also installed on the vertical plate 1, and the vertical slide rail is arranged parallel to the adjusting member.

[0077] In this embodiment, the vertical slide rail is slidably connected to the frame of the overlock machine through the slider, and the adjusting member is connected to the frame. Preferably, the adjusting member adopts a screw rod, and the relative position between the vertical plate and the frame is adjusted by rotating the screw rod. This facilitates the adjustment of the height position of the conveying mechanism and is also convenient for installation and disassembly. The conveying mechanism is modularly designed. When different products need to be replaced, different types of conveying mechanisms can be replaced, which is convenient for subsequent modification and upgrading of the equipment and will be more cost-effective.

[0078] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0079] In the present utility model, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral one; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, for example, the two can form a mechanical abutment or abutment connection through abutment, contact, etc., the two can also be directly hung or hung through an intermediate medium, etc., or it can be the internal connection of the two elements or the interaction relationship between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A flexible fabric conveying mechanism for an overlock sewing machine, characterized in that: It includes a vertical plate, a support plate arranged below the vertical plate, three edge pressing conveyor belts arranged on the front side of the vertical plate, and a driving mechanism for driving the three edge pressing conveyor belts to transmit synchronously. The three edge pressing conveyor belts are arranged at intervals from front to back, and a longitudinal spacing is provided between adjacent edge pressing conveyor belts, and the bottom surfaces of the three edge pressing conveyor belts are against the support plate; A plurality of transmission wheels are rotatably mounted on the front side of the vertical plate, and each of the edge pressing conveyor belts is wound around at least two of the transmission wheels.

2. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 1, characterized in that: The bottom surface of the edge pressing conveyor belt on the front side is arranged directly opposite to the seam edge of the flexible fabric; The bottom surface of the edge pressing conveyor belt in the middle is arranged directly opposite to the rear end of the seam edge of the flexible fabric.

3. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 1, characterized in that: The edge pressing conveyor belt comprises a first edge pressing conveyor belt, a second edge pressing conveyor belt and a third edge pressing conveyor belt which are arranged at intervals from front to rear; The two ends of the bottom surface of the third edge pressing conveyor belt are respectively arranged close to the left and right sides of the vertical plate; The left side of the bottom surface of the first edge pressing conveyor belt is arranged on the right side of the left end of the bottom surface of the third edge pressing conveyor belt, and the right side of the first edge pressing conveyor belt is arranged on the left side of the right end of the bottom surface of the third edge pressing conveyor belt; The left side of the bottom surface of the second edge pressing conveyor belt is arranged between the left side and the right side of the bottom surface of the first edge pressing conveyor belt, and the right side of the bottom surface of the second edge pressing conveyor belt is arranged flush with the right side of the bottom surface of the third edge pressing conveyor belt.

4. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 3, characterized in that: The transmission wheels include a first transmission wheel, a second transmission wheel, a third transmission wheel, a fourth transmission wheel and a fifth transmission wheel which are arranged at intervals from left to right; The left end and the right end of the third edge pressing conveyor belt are respectively wound around the first transmission wheel and the fifth transmission wheel; The left end and the right side of the first edge pressing conveyor belt are respectively wound around the second transmission wheel and the fourth transmission wheel; The left end and the right end of the second edge pressing conveyor belt are respectively wound around the third transmission wheel and the fifth transmission wheel.

5. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 4, characterized in that: The lower inner surface of the third edge pressing conveyor belt abuts against the bottom surfaces of the third transmission wheel and the fourth transmission wheel; The lower inner surface of the second edge pressing conveyor belt abuts against the bottom surface of the third transmission wheel.

6. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 4, characterized in that: A feed transmission wheel is also installed on the left side of the first transmission wheel, and the feed transmission wheel is rotatably connected to the vertical plate via a bracket, the right end of the bracket is rotatably connected to the vertical plate, and the feed transmission wheel is rotatably connected to the left side of the bracket, and the left end of the third edge pressing conveyor belt is wound around the left outer surface of the feed transmission wheel; A driving member is also installed on the left side of the vertical plate, and the driving member drives the bracket to rotate around the vertical plate to raise or lower the bottom of the feed transmission wheel.

7. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 1, characterized in that: The driving mechanism is installed on the upper part of the vertical plate, and the driving mechanism includes a driving wheel and a motor. The motor is configured to drive the driving wheel to rotate, and the upper parts of the three edge pressing conveyor belts are wound around the driving wheel.

8. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 1, characterized in that: A plurality of pressing parts are arranged on the front side surface of the vertical plate, and the plurality of pressing parts are arranged at intervals from left to right. The bottom surface of the pressing parts abuts against the inner surface of the bottom of the corresponding edge pressing conveyor belt, and the pressing parts abut the bottom surface of the edge pressing conveyor belt against the top surface of the support plate.

9. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 1, characterized in that: A sensor is also provided, wherein the detection end of the sensor is arranged downward, and the detection end of the sensor is arranged directly opposite to the longitudinal spacing between the front side pressure conveyor belt and the middle side pressure conveyor belt.

10. The flexible fabric conveying mechanism of the overlock sewing machine according to claim 1, characterized in that: A vertical slide rail and an adjusting member are also installed on the vertical plate, and the vertical slide rail is arranged parallel to the adjusting member.

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