Automatic threader for a double needle overlock machine

Abstract

An automatic tape feeding device of a double-needle sewing tape machine comprises a main support, a feeding unit, and a cutting mechanism. The main support comprises a vertically arranged main support connecting plate and a lower main support positioning plate. The feeding unit comprises a feeding roller, a driving motor, a clamping cylinder, and a feeding bearing. The driving motor drives the feeding roller to rotate. The clamping cylinder is installed below the main support. The feeding bearing is connected to the piston rod of the clamping cylinder and is located below the tape. The feeding bearing and the feeding roller clamp the tape through the clamping cylinder, thereby achieving active tape feeding and length adjustment. The guide unit is integrated into the main support and is located behind the machine needle, which is used to adjust the movement path of the tape. The cutting mechanism is located in the front part of the main support and is used for precise cutting of the tape. The advantages are that through the coordinated linkage of the guide unit, the feeding unit, and the cutting mechanism, the automatic and precise feeding of the tape during the shoe changing process is realized, manual intervention is not required, production interruptions caused by traditional manual operation are avoided, and the sewing efficiency of the double-needle sewing tape machine is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of shoe sewing equipment, specifically relating to an automatic welt feeding device for a double-needle welt sewing machine. Background Technology

[0002] Goodyear welted construction, a classic technique for making high-top boots, provides exceptional durability and repairability through its unique welt structure, and is widely used in high-end footwear manufacturing. In the production of Goodyear high-top boots, the welt stitching process is one of the key steps determining product quality. Its core involves using a double-needle welt sewing machine to precisely sew the welt to the upper, midsole, and outsole, forming a continuous and tight seam. Currently, although double-needle welt sewing machines in the industry have achieved a high level of automation and can achieve continuous welt sewing, the following technical defects still exist in actual production: When the welt sewing of a single high boot is about to end, the equipment needs to automatically cut the welt first. However, due to the fixed distance between the cutter and the needle, which is usually the margin not covered by the needle stroke, the sewing action still needs to continue for several stitches to complete the finishing operation of the current station; After a single boot body is finished, when the equipment switches to sewing the next boot body, due to the positional deviation between the tail end of the welt cut at the previous station and the head of the welt to be sewn on the new boot body, the new welt is not pre-feeded directly under the needle. The operator needs to manually pull the welt to adjust it to be under the needle before starting a new round of sewing.

[0003] The aforementioned manual feeding method for welts has significant drawbacks: First, reliance on manual intervention disrupts the production rhythm, making continuous equipment operation impossible and severely impacting production efficiency. Second, the force and length of manual pulling are difficult to control precisely, and the pulling distance varies among different operators, easily leading to gaps, overlaps, or collisions with the machine needle at the welt's ends, resulting in uneven stitching, poor appearance, and other quality defects. Third, the uncertainty of manual operation increases the defect rate, requiring additional quality inspection and rework processes, further reducing production efficiency.

[0004] In summary, given the technical shortcomings of automatic filament feeding in double-needle filament sewing machines, there is an urgent need to design a device that can automatically and accurately feed the filament during boot changes to solve the problems of low efficiency and unstable quality caused by manual operation. Utility Model Content

[0005] The objective of this invention is to provide an automatic welt feeding device for a double-needle welt sewing machine that is compact, easy to operate, and reliable and durable. This device helps to achieve automatic and precise welt feeding during boot changing by adding a feeding unit to enable the coordinated linkage of the feeding unit, guiding unit, and cutting mechanism. It eliminates the need for manual intervention, avoids production interruptions caused by traditional manual operation, and significantly improves the sewing efficiency of Goodyear high boots.

[0006] The present invention achieves its objective as follows: An automatic edging feeding device for a double-needle edging sewing machine includes a main support frame, on which a vertically arranged main support frame connecting plate and a main support frame positioning plate located below the connecting plate are formed; a feeding unit is positioned and installed on the main support frame and used for active feeding and length adjustment of the edging. The feeding unit includes a feeding roller, a drive motor for driving the feeding roller to rotate, a clamping cylinder, and a feeding bearing. The feeding roller is positioned above the edging and rotates in cooperation with it. The clamping cylinder is connected to the main support frame. The feeding bearing is mounted on the piston rod of the clamping cylinder and positioned below the weft strip. The clamping cylinder drives the feeding bearing to move up and down, so that the feeding bearing and the feeding roller work together to clamp the weft strip, thereby achieving active feeding and length adjustment of the weft strip. A guide unit is integrated on the main support and positioned behind the needle of the double-needle weft sewing machine. This guide unit is used to adjust and position the movement path of the weft strip. A cutting mechanism is located at the front of the main support and is used for precise cutting of the weft strip.

[0007] In a specific embodiment of this utility model, a roller bracket is fixedly connected to the tail end of the main support positioning plate of the main support in the length direction. A roller is installed on the roller bracket. The welt can pass through the roller bracket, and the roller is positioned below the welt and can guide the welt.

[0008] In another specific embodiment of this utility model, the drive motor of the feeding unit is fixedly mounted on the main support connecting plate of the main support, and the drive shaft of the drive motor passes through the main support connecting plate and is connected to the feeding roller for transmission, thereby driving the feeding roller to rotate.

[0009] In another specific embodiment of this utility model, the clamping cylinder of the feeding unit is fixedly installed at the lower position of the main support by a cylinder bracket; and a bearing bracket is installed at the top of the piston rod of the clamping cylinder, and the feeding bearing is rotatably installed on the bearing bracket by a bearing pivot pin, and the feeding bearing is located at the position directly below the feeding roller.

[0010] In another specific embodiment of this utility model, the guiding unit includes a rear guide frame for the weft, a front guide frame for the weft, a horizontal steering adjustment guide frame for the weft, a first axial adjustment guide frame I for the weft, a second axial adjustment guide frame II for the weft, and a weft guide nozzle; wherein, the rear guide frame and the front guide frame for the weft are symmetrically arranged on the right and left sides of the bottom of the main support connecting plate of the main support, corresponding to the positions on both sides of the feeding roller, and the rear guide frame and the front guide frame for the weft are used for the initial lateral guidance of the movement of the weft; the horizontal steering adjustment guide frame for the weft... The guide frame is rotatably connected to the middle position of the main support, and the horizontal steering adjustment guide frame can adjust the conveying path of the welt in the horizontal direction; the first axial adjustment guide frame I and the second axial adjustment guide frame II of the welt are installed at the front side of the horizontal steering adjustment guide frame, and the first axial adjustment guide frame I and the second axial adjustment guide frame II of the welt can form an adjustable gap to constrain the axial movement of the welt; the welt guide nozzle is located at the rear position of the needle and is used to guide the welt to the sewing position of the needle.

[0011] In another specific embodiment of this utility model, a guide frame small support plate is fixedly installed at the front position of the main support positioning plate of the main support, and an adjustment guide frame connecting plate is provided on the horizontal steering adjustment guide frame of the welt. An arc-shaped hole is opened on the adjustment guide frame connecting plate, and the adjustment guide frame connecting plate is rotatably connected to the guide frame small support plate through a connecting pin passing through the arc-shaped hole of the adjustment guide frame connecting plate, so that the horizontal steering adjustment guide frame of the welt is rotatably connected to the main support.

[0012] In a further specific embodiment of this utility model, a connecting pin for the horizontal steering adjustment guide frame of the welt is formed at the front part of the horizontal steering adjustment guide frame of the welt. The first guide frame I for axial adjustment of the welt and the second guide frame II for axial adjustment of the welt are both fitted onto the connecting pin for the horizontal steering adjustment guide frame of the welt, thereby realizing the positioning and installation of the two.

[0013] In a further specific embodiment of this utility model, the welt rear guide frame includes a support body, a front-to-back adjusting plate, and a vertical adjusting plate. The front-to-back adjusting plate is located above the support body and extends horizontally, while the vertical adjusting plate is located below the support body and extends vertically. The front-to-back adjusting plate and the vertical adjusting plate are used to adjust the front-to-back and vertical positions of the welt. A welt channel cavity is formed between the front-to-back adjusting plate and the vertical adjusting plate. The size of the welt channel cavity can be adjusted by adjusting the positions of the front-to-back adjusting plate and the vertical adjusting plate to accommodate different types of welts.

[0014] In another specific embodiment of this utility model, both the first guide frame I for axial adjustment of the weft and the second guide frame II for axial adjustment of the weft are provided with grooves that match the outer contour of the weft, and the axial conveying length of the weft is controlled by adjusting the gap width between the two.

[0015] In yet another specific embodiment of this utility model, the cutting mechanism includes a cutter, which is mounted on the front side of the main support and is arranged perpendicular to the conveying path of the weft strip and the cutting action is triggered by the equipment control system.

[0016] The beneficial effects of this utility model are as follows: First, by adding an automatic welt feeding device to the double-needle welt sewing machine, this technical solution utilizes the coordinated linkage of the guiding mechanism, feeding mechanism, and cutting mechanism to achieve automatic and precise conveying of the welt during boot changing. This allows the operator to automatically convey the welt to the underside of the needle after sewing the first Goodyear high boot and before sewing the second Goodyear high boot, ensuring that its length is just right and that it fits perfectly with the automatically cut welt tail, forming a tight closed loop. This replaces traditional manual operation, and the welt conveying process is stable and smooth with accurate feeding length, effectively avoiding production interruptions and significantly improving production efficiency. Second, this technical solution ensures that the head of the new welt fits perfectly with the cut tail, avoiding gaps, overlaps, or collisions with the needle in the sewing thread, greatly improving the product's appearance quality and making it suitable for industrial production. In addition, the guiding unit 3 can provide multi-dimensional guidance for the welt and can adapt to the conveying needs of welts of different specifications, effectively enhancing the equipment's versatility. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded three-dimensional structural view of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention when the welt is started; Figure 4 This is a schematic diagram of the structure of the present invention when the shoe is sewn to the position where the welt is joined at the beginning and end of the shoe; Figure 5 This is a schematic diagram of the structure of the present invention during automatic conveying of the weft strip; Figure 6 This is a three-dimensional structural diagram of the guide frame behind the welt in this utility model.

[0018] In the diagram: 1. Main support frame, 11. Main support frame connecting plate, 12. Main support frame positioning plate, 121. Guide frame small support plate, 13. Roller support, 131. Roller; 2. Feeding unit, 21. Feeding roller, 22. Drive motor, 23. Clamping cylinder, 231. Cylinder support, 232. Bearing support, 24. Feeding bearing, 241. Bearing fulcrum pin; 3. Guide unit, 31. Welt rear guide frame, 311. Support body, 312. Front and rear adjusting pressure plate 313. Up and down adjusting pressure plate; 314. Welt channel cavity; 32. Welt front guide frame; 33. Welt horizontal steering adjusting guide frame; 331. Adjusting guide frame connecting plate; 3311. Adjusting guide frame connecting plate arc hole; 332. Welt horizontal steering adjusting guide frame connecting pin; 34. Welt axial adjustment first guide frame I; 35. Welt axial adjustment second guide frame II; 36. Welt guide nozzle; 4. Cutting mechanism; 41. Cutter; 5. Welt; 6. Needle. Detailed Implementation

[0019] The following will provide a detailed description by way of embodiments. However, the description of the embodiments is not intended to limit the present utility model. Any formal but not substantive equivalent transformations made based on the present utility model concept should be considered within the scope of the present utility model's technical solution.

[0020] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 The description pertains to the location and state of the object, and therefore should not be construed as a specific limitation on the technical solution provided by this utility model.

[0021] Please see Figures 1 to 6This utility model relates to an automatic edging feeding device for a double-needle edging sewing machine, comprising a main support 1, on which a vertically arranged main support connecting plate 11 and a main support positioning plate 12 formed below the main support connecting plate 11 are formed; a feeding unit 2, which is positioned and installed on the main support 1 and is used for active feeding and length adjustment of the edging 5. The feeding unit 2 includes a feeding roller 21, a drive motor 22 for driving the feeding roller 21 to rotate, a clamping cylinder 23 and a feeding bearing 24. The feeding roller 21 is located above the edging 5 and rotates with the edging. The clamping cylinder 23 is connected to the lower position of the main support 1, and the feeding bearing 24 is mounted on the piston rod of the clamping cylinder 23 and located below the edging 5. The cylinder 23 can drive the feeding bearing 24 to move up and down so that the feeding bearing 24 and the feeding roller 21 can jointly clamp the aforementioned welt 5, thereby achieving active feeding and length adjustment of the welt 5. When it is necessary to adjust the feeding length of the welt 5, the aforementioned clamping cylinder 23 pushes the feeding bearing 24 upward through the piston rod, and causes the feeding bearing 24 and the feeding roller 21 to clamp the aforementioned welt 5, so that the feeding roller 21 can drive the welt 5 forward after rotating, thereby achieving active feeding; a guide unit 3 is also shown. The aforementioned guide unit 3 is integrated and installed on the aforementioned main support 1 and is located at the rear position corresponding to the needle 6 of the double needle sewing welt machine. The guide unit 3 is used to adjust and position the movement path of the aforementioned welt 5; a cutting mechanism 4 is located at the front position of the aforementioned main support 1 and is used for precise cutting of the welt 5.

[0022] In this embodiment, the aforementioned feeding roller 21 is driven at a constant speed by the drive motor 22. Combined with the rigid support of the guide unit 3, it ensures that the conveying process of the weft 5 is smooth and without jamming, reducing faults such as broken weft and deviation, and lowering maintenance costs.

[0023] Please see Figure 3 When the aforementioned double-needle welt sewing machine begins its sewing operation, the front end of the aforementioned welt 5 is below the needle 6. The operator places the shoe at the front end of the welt 5, and the operating pedal begins sewing. At this time, the feeding roller 21 and the feeding bearing 24 above the clamping cylinder 23 are in a released state, that is, the feeding bearing 24 is located below the aforementioned welt 5. Simultaneously, the welt 5 moves passively under the operator's action as the shoe is sewn. Please refer to [link to previous text]. Figure 4 When the operator sews the shoe to the point where the welt 5 joins the shoe end to end, the cutting mechanism 4 is used via a knee-controlled switch to cut the welt 5, making the welt 5 end to end. Sewing of the welt 5 continues, with a few stitches remaining after the welt 5 is cut, until the welt 5 is sewn tightly shut end to end on the shoe, at which point the shoe can be removed. Please refer to [further details omitted]. Figure 5 At this point, the operator operates the switch again, causing the clamping cylinder 23 to drive the feeding bearing 24 to push the front end of the welt 5 upwards to the bottom of the feeding roller 21 and clamp it. After the welt 5 is clamped, the drive motor 22 can drive the feeding roller 21 to rotate, so that the welt 5 can move forward to achieve active feeding of the welt 5. When the front end of the welt 5 reaches the position below the needle 6, the feeding stops. Thus, after the operator finishes sewing the first Goodyear high boot, before sewing the second Goodyear high boot, the welt 5 ready to be sewn has been automatically fed to the bottom of the needle 6, and its length is just right, so that the sewing operation can start again.

[0024] Please see Figure 1 and Figure 2 A roller bracket 13 is fixedly connected to the tail end of the main support positioning plate 12 in the length direction of the aforementioned main support 1. A roller 131 is installed on the roller bracket 13. The aforementioned edging 5 can pass through the roller bracket 13, and the aforementioned roller 131 is positioned below the aforementioned edging 5 and can guide the edging 5. During the conveying process, the edging 5 needs to pass through the gap between the horizontal side of the roller bracket 13 and the roller 131. At this time, the edging 5 is pressed against the upper surface of the roller 131 due to its own weight, and the roller 131 can guide the edging 5 through rolling contact, which can effectively prevent the edging 5 from lateral deviation caused by vibration or external force during the conveying process and ensure that it moves stably along the preset path.

[0025] In this embodiment, the drive motor 22 of the aforementioned feeding unit 2 is fixedly mounted on the main support connecting plate 11 of the aforementioned main support 1. The drive shaft of the drive motor 22 passes through the aforementioned main support connecting plate 11 and is connected to the aforementioned feeding roller 21 for transmission, thereby driving the aforementioned feeding roller 21 to rotate. The drive motor 22 is preferably a servo motor to achieve high-precision speed control. After the drive shaft of the drive motor 22 passes through the through hole on the main support connecting plate 11, it is connected to the feeding roller 21 through a coupling. When the drive motor 22 starts, its rotation is transmitted to the feeding roller 21, driving the feeding roller 21 to rotate around its own axis, thereby pushing the webbing 5 forward through the friction with the upper surface of the webbing 5.

[0026] Please continue reading Figure 1 and Figure 2The clamping cylinder 23 of the aforementioned feeding unit 2 is fixedly installed at the lower position of the main support 1 via a cylinder bracket 231. A bearing bracket 232 is installed at the top of the piston rod of the aforementioned clamping cylinder 23, and the aforementioned feeding bearing 24 is rotatably installed on the bearing bracket 232 via a bearing pivot pin 241. The feeding bearing 24 is located at the position directly below the aforementioned feeding roller 21. Since the aforementioned bearing bracket 232 is linked with the piston rod of the clamping cylinder 23, when the aforementioned clamping cylinder 23 extends or retracts, the aforementioned bearing bracket 232 drives the feeding bearing 24 to move in the vertical direction, ultimately enabling the feeding bearing 24 and the wheel surface of the feeding roller 21 to clamp or release the webbing 5. When the two are engaged, i.e., when the webbing 5 is in the clamped state, the aforementioned feeding bearing 24 applies upward pressure to the webbing 5 and works together with the feeding roller 21 to realize the active conveying of the aforementioned webbing 5.

[0027] In this embodiment, the aforementioned guide unit 3 includes a rear guide frame 31 for the welt, a front guide frame 32 for the welt, a horizontal steering adjustment guide frame 33 for the welt, a first guide frame I 34 for the welt axial adjustment, a second guide frame II 35 for the welt axial adjustment, and a welt guide nozzle 36. Each component works together to accurately guide the welt 5 from its initial entry to the sewing position. The aforementioned rear guide frame 31 and front guide frame 32 are symmetrically arranged on the right and left sides of the bottom of the main support connecting plate 11 of the main support 1, corresponding to the positions on both sides of the aforementioned feeding roller 21. The rear guide frame 31 and front guide frame 32 are used for the initial lateral guidance of the aforementioned webbing 5. The two are specifically fixed to the bottom mounting holes of the main support connecting plate 11 by bolts. The aforementioned rear guide frame 31 and front guide frame 32 have the same structure, and their guide slots are arranged opposite each other. When the webbing 5 is output from the roller support 13, it first enters the guide slot of the rear guide frame 31 and moves along the groove trajectory to the slot of the front guide frame 32, and finally enters the clamping area of ​​the feeding roller 21. During this process, the lateral displacement of the webbing 5 is restricted by the groove structure to ensure that it enters the subsequent conveying stage in the correct posture. The aforementioned horizontal steering adjustment guide frame 33 is rotatably connected to the middle position of the main support 1, and the horizontal steering adjustment guide frame 33 can adjust the conveying path of the aforementioned wig 5 in the horizontal direction. The aforementioned axial adjustment first guide frame I34 and axial adjustment second guide frame II35 are installed at the front position of the aforementioned horizontal steering adjustment guide frame 33. The axial adjustment first guide frame I34 and axial adjustment second guide frame II35 can form an adjustable gap to constrain the axial movement of the aforementioned wig 5. The aforementioned wig guide nozzle 36 is located at the rear position of the aforementioned needle 6 and is used to guide the wig 5 to the sewing position of the aforementioned needle 6. After the wig 5 has passed the guidance constraint, it can be accurately conveyed to the sewing position of the needle 6 through the guide groove of the guide nozzle 36, avoiding sewing misalignment caused by path deviation and improving sewing quality.

[0028] Furthermore, a guide frame small support plate 121 is fixedly installed at the front position of the main support positioning plate 12 of the aforementioned main support 1, and an adjustment guide frame connecting plate 331 is provided on the aforementioned welt horizontal turning adjustment guide frame 33. An adjustment guide frame connecting plate arc-shaped hole 3311 is opened on the adjustment guide frame connecting plate 331. The aforementioned adjustment guide frame connecting plate 331 is rotatably connected to the aforementioned guide frame small support plate 121 through a connecting pin passing through the arc-shaped hole 3311, thereby making the aforementioned welt horizontal turning adjustment guide frame 33 rotatably connected to the aforementioned main support 1. This design allows the operator to manually rotate the adjustment guide frame connecting plate 331 to the target angle according to the sewing angle requirements of different boot bodies, such as the difference in sewing angle between pointed boots and round boots, and then fix the pin position by locking the nut, thereby adjusting the horizontal conveying path of the welt 5 to precisely match the sewing angle of the needle 6.

[0029] In this embodiment, a connecting pin 332 for the horizontal steering adjustment guide frame 33 is formed at the front of the aforementioned horizontal steering adjustment guide frame 33. The aforementioned first axial adjustment guide frame I34 and second axial adjustment guide frame II35 are both fitted onto the connecting pin 332, thereby achieving their own positioning and installation. The aforementioned first axial adjustment guide frame I34 and second axial adjustment guide frame II35 are both provided with mounting holes that match the diameter of the connecting pin 332. This design allows the first axial adjustment guide frame I34 and the second axial adjustment guide frame II35 to rotate relative to the horizontal steering adjustment guide frame 33 while maintaining a fixed relative position, providing a stable installation foundation for subsequent adjustment of the axial clearance of the aforementioned 5.

[0030] Please see Figure 6 and combined Figure 1 and Figure 2 The aforementioned welt rear guide frame 31 includes a support body 311, a front-to-back adjusting pressure plate 312, and a vertical adjusting pressure plate 313. The front-to-back adjusting pressure plate 312 is located above the support body 311 and extends horizontally, while the vertical adjusting pressure plate 313 is located below the support body 311 and extends vertically. The front-to-back adjusting pressure plate 312 and the vertical adjusting pressure plate 313 are used to adjust the front-to-back and vertical positions of the aforementioned welt. A welt channel cavity 314 is formed between the front-to-back adjusting pressure plate 312 and the vertical adjusting pressure plate 313. The size of the welt channel cavity 314 can be adjusted by adjusting the positions of the front-to-back adjusting pressure plate 312 and the vertical adjusting pressure plate 313, so that the welt channel cavity 314 matches the outer contour of the welt 5 to accommodate different types of welts 5.

[0031] Furthermore, both the aforementioned first guide frame I34 and the second guide frame II35 for adjusting the axial direction of the sliver are provided with grooves that match the outer contour of the aforementioned sliver 5, and the axial conveying length of the sliver 5 is controlled by adjusting the gap width between the two.

[0032] In this embodiment, the aforementioned cutting mechanism 4 includes a cutter 41, which is mounted on the front side of the main support 1. The cutter 41 is arranged perpendicular to the conveying path of the aforementioned weft strip 5 and the cutting action is triggered by the equipment control system. The cutter 41 is preferably a straight blade structure and is mounted on the cutting mechanism 4 via a blade holder.

[0033] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0034] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. An automatic edging feeding device for a double-needle edging sewing machine, characterized in that: The system includes a main support frame (1), on which a vertically arranged main support frame connecting plate (11) and a main support frame positioning plate (12) formed below the main support frame connecting plate (11); a feeding unit (2), which is positioned and installed on the main support frame (1) and is used for active conveying and length adjustment of the webbing (5). The feeding unit (2) includes a feeding roller (21), a drive motor (22) for driving the feeding roller (21) to rotate, a clamping cylinder (23) and a feeding bearing (24). The feeding roller (21) is located above the webbing (5) and rotates with the webbing (5). The clamping cylinder (23) is connected to the lower part of the main support frame (1), and the feeding unit (24) is positioned below the webbing (11). A feed bearing (24) is mounted on the piston rod of the clamping cylinder (23) and positioned below the fringe (5). The clamping cylinder (23) can drive the feed bearing (24) to move up and down so that the feed bearing (24) and the feed roller (21) together achieve the clamping action on the fringe (5), thereby achieving active conveying and length adjustment of the fringe (5); a guide unit (3) is integrated on the main support (1) and positioned behind the needle (6) of the double needle fringe sewing machine, and the guide unit (3) is used to adjust and position the movement path of the fringe (5); a cutting mechanism (4) is positioned at the front of the main support (1) and is used for precise cutting of the fringe (5).

2. The automatic edging feeding device of a double-needle edging sewing machine according to claim 1, characterized in that: A roller bracket (13) is fixedly connected to the tail end of the main support positioning plate (12) of the main support (1) in the length direction. A roller (131) is installed on the roller bracket (13). The wainscoting (5) can pass through the roller bracket (13), and the roller (131) is positioned below the wainscoting (5) and can guide the wainscoting (5).

3. The automatic edging feeding device of a double-needle edging sewing machine according to claim 1, characterized in that: The drive motor (22) of the feeding unit (2) is fixedly installed on the main support connecting plate (11) of the main support (1). The drive shaft of the drive motor (22) passes through the main support connecting plate (11) and is connected to the feeding roller (21) for transmission, thereby driving the feeding roller (21) to rotate.

4. The automatic edging feeding device of a double-needle edging sewing machine according to claim 1, characterized in that: The clamping cylinder (23) of the feeding unit (2) is fixedly installed at the lower position of the main support (1) by a cylinder bracket (231); and a bearing bracket (232) is installed at the top of the piston rod of the clamping cylinder (23), and the feeding bearing (24) is rotatably installed on the bearing bracket (232) by a bearing pivot pin (241), and the feeding bearing (24) is located at the position directly below the feeding roller (21).

5. The automatic edging feeding device of a double-needle edging sewing machine according to claim 1, characterized in that: The guiding unit (3) includes a rear guide frame (31), a front guide frame (32), a horizontal steering adjustment guide frame (33), a first axial adjustment guide frame I (34), a second axial adjustment guide frame II (35), and a guide nozzle (36); wherein, the rear guide frame (31) and the front guide frame (32) are symmetrically arranged on the right and left sides of the bottom of the main support connecting plate (11) of the main support (1) and correspond to the two sides of the feeding roller (21), and the rear guide frame (31) and the front guide frame (32) are used for the initial lateral guidance of the filament (5); the horizontal steering adjustment guide frame (33) The wig horizontal steering adjustment guide (33) is rotatably connected to the middle position of the main support (1) and can adjust the conveying path of the wig (5) in the horizontal direction; the wig axial adjustment first guide I (34) and the wig axial adjustment second guide II (35) are installed at the front position of the wig horizontal steering adjustment guide (33) and can form an adjustable gap to constrain the axial movement of the wig (5); the wig guide nozzle (36) is located at the rear position of the needle (6) and is used to guide the wig (5) to the sewing position of the needle (6).

6. The automatic edging feeding device of a double-needle edging sewing machine according to claim 5, characterized in that: A guide frame small support plate (121) is fixedly installed at the front position of the main support positioning plate (12) of the main support (1). An adjustment guide frame connecting plate (331) is provided on the horizontal steering adjustment guide frame (33). An adjustment guide frame connecting plate arc hole (3311) is opened on the adjustment guide frame connecting plate (331). The adjustment guide frame connecting plate (331) is rotatably connected to the guide frame small support plate (121) through a connecting pin that passes through the arc hole (3311) of the adjustment guide frame connecting plate, so that the horizontal steering adjustment guide frame (33) is rotatably connected to the main support (1).

7. The automatic edging feeding device of a double-needle edging sewing machine according to claim 5, characterized in that: A connecting pin (332) for horizontal steering adjustment of the sprue is formed at the front of the sprue horizontal steering adjustment guide frame (33). The first guide frame I (34) for axial adjustment of the sprue and the second guide frame II (35) for axial adjustment of the sprue are both mounted on the connecting pin (332) for horizontal steering adjustment of the sprue, thereby achieving their own positioning and installation.

8. The automatic edging feeding device of a double-needle edging sewing machine according to claim 1, characterized in that: The welt rear guide frame (31) includes a support body (311), a front and rear adjusting pressure plate (312), and an upper and lower adjusting pressure plate (313). The front and rear adjusting pressure plate (312) is located above the support body (311) and extends horizontally, while the upper and lower adjusting pressure plate (313) is located below the support body (311) and extends vertically. The front and rear adjusting pressure plate (312) and the upper and lower adjusting pressure plate (313) are used to adjust the front and rear and upper and lower positions of the welt. A welt channel cavity (314) is formed between the front and rear adjusting pressure plate (312) and the upper and lower adjusting pressure plate (313). The size of the welt channel cavity (314) can be adjusted by adjusting the positions of the front and rear adjusting pressure plate (312) and the upper and lower adjusting pressure plate (313) to accommodate different types of welts (5).

9. The automatic edging feeding device of a double-needle edging sewing machine according to claim 1, characterized in that: Both the first guide frame I (34) and the second guide frame II (35) for axial adjustment of the sliver are provided with grooves that match the outer contour of the sliver (5). The axial conveying length of the sliver (5) is controlled by adjusting the gap width between the two.

10. The automatic edging feeding device of a double-needle edging sewing machine according to claim 1, characterized in that: The cutting mechanism (4) includes a cutter (41), which is mounted on the front side of the main support (1). The cutter (41) is arranged perpendicular to the conveying path of the rail (5) and the cutting action is triggered by the equipment control system.

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