Magic tape feeding and sewing all-in-one machine and sewing method

Abstract

The application provides a magic tape feeding and sewing integrated machine, and belongs to the technical field of sewing machines. The magic tape feeding and sewing integrated machine solves the technical problem that the magic tape feeding and sewing integrated machine adopts a pressing feeding mode, which results in low sewing efficiency. The magic tape feeding and sewing integrated machine comprises a sewing machine, a magic tape conveyor and a transfer mechanism. The transfer mechanism comprises a transfer frame, and a strip-shaped hole is arranged on the transfer frame. The transfer frame can suspend the magic tape conveyed by the magic tape conveyor at the strip-shaped hole. The transfer frame can move from above a pressing frame tightly pressed on a sewing table to the inside of the pressing frame. A magic tape presser foot can be pressed into the strip-shaped hole of the transfer frame. The application provides a sewing method of the magic tape feeding and sewing integrated machine, which comprises the following steps: A, magic tape feeding; B, cloth positioning; C, transfer frame feeding and positioning; D, transfer frame resetting and magic tape sewing; and E, pressing frame and magic tape presser foot resetting. The application has the advantages of improving the quality and efficiency of magic tape sewing.

Description

Technical Field

[0001] This invention belongs to the field of sewing machine technology, and relates to a Velcro feeding sewing machine; it also relates to a sewing method for the Velcro feeding sewing machine. Background Technology

[0002] The Velcro feeding and sewing machine is an integrated machine for cutting and sewing Velcro, which solves the current situation where Velcro needs to be manually picked and sewn, and greatly improves the efficiency of Velcro sewing.

[0003] In hook and loop fastener sewing machines, hook and loop fasteners are output via a hook and loop fastener conveyor. The fasteners are then pressed onto the sewing table by presser feet before being transferred to the sewing machine. Examples include the automatic hook and loop fastener feeding sewing machine disclosed in Chinese patent literature [Application No. 201810437908.7] and a pressing mechanism for a hook and loop fastener feeding sewing machine [Announcement No. CN217459825U]. During sewing, the hook and loop fasteners must first be pressed onto the hook and loop fastener holder on the sewing table of the sewing machine. The holder lifts the fastener, the fabric is then placed on the sewing table, and the holder rests against the fabric before the fasteners are wrapped around the hook and loop fastener. The hook and loop fasteners are sewn onto the fabric using a support bracket. However, in practice, the fastener bracket can obstruct the view, making it difficult to quickly locate the sewing position after the fabric is placed on the sewing table, thus affecting sewing efficiency. Furthermore, the hook and loop fasteners on the bracket are suspended on the fabric, meaning they are not firmly attached. This results in a loose fit between the center of the fastener and the fabric, causing a bulge and poor sewing quality. Additionally, to ensure a seamless connection between the fasteners and the conveyor belt as they enter the sewing table, a support plate is required, complicating the overall structure of the conveyor. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a Velcro feeding sewing machine. The technical problem solved by this invention is to be able to transfer the Velcro to the inside of the presser frame and press it firmly after the presser frame is placed on the sewing table.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A hook and loop fastener feeding and sewing machine includes a sewing machine, a hook and loop fastener conveyor, and a transfer mechanism. The sewing machine includes a sewing table, a presser frame for pressing the hook and loop fastener onto the sewing table, and hook and loop fastener foot. The transfer mechanism includes a transfer frame that can move back and forth between the hook and loop fastener conveyor and the sewing machine. The transfer frame has a slotted hole, which suspends the hook and loop fastener conveyed by the conveyor at the slotted hole. When the transfer frame moves towards the sewing machine, it moves from above the presser frame on the sewing table to the inside of the presser frame. When the transfer frame moves to the inside of the presser frame, the hook and loop fastener foot is pressed into the slotted hole of the transfer frame.

[0007] The initial position of the transfer frame is located in front of the hook and loop conveyor and aligned with the conveyor's outlet. Hook and loop fasteners enter the transfer frame's slot through the conveyor's outlet and are positioned within the slot. The transfer frame moves towards the sewing machine, at which point the presser foot presses the fabric firmly onto the sewing table. During its movement, the transfer frame is higher than the presser foot, allowing it to carry the hook and loop fasteners over the presser foot and into its inner side. Once in position, the fasteners are pressed into the slot by the presser foot, securing them to the fabric. After feeding, the transfer frame retracts to its original position. The hook and loop fasteners are mounted on the transfer frame, and during transport... The hook and loop fastener moves directly along the transfer frame, passing over the presser foot. This allows the fabric to be positioned on the sewing table of the sewing machine first, and then the hook and loop fastener is transferred to the fabric and pressed firmly. This ensures precise positioning of the fabric before placing the hook and loop fastener on the fabric, improving the efficiency of workers sewing hook and loop fasteners while ensuring consistent product quality. The slotted holes in the transfer frame allow the hook and loop fastener to rest on the frame with its center suspended in the air. The presser foot can then press down on the center of the hook and loop fastener to fix it to the fabric. When the transfer frame returns to its original position, the edge of the hook and loop fastener is exposed, allowing for sewing along the edge of the fastener without adjusting the presser foot.

[0008] In the aforementioned Velcro-feed sewing machine, the transfer frame includes two transfer rods arranged in parallel, with the aforementioned strip-shaped hole formed between them. Connecting rods are attached to the rear ends of the two transfer rods. In this structure, the front ends of the two transfer rods are open, and the Velcro presser foot disengages from the front ends of the two transfer rods when the transfer frame resets.

[0009] In the aforementioned Velcro feeding sewing machine, positioning grooves are formed on the inner walls of both conveying rods. One end of each positioning groove on the rear end of the conveying rod is a through end, and the positioning grooves on the two conveying rods are positioned opposite each other. The two edges of the Velcro insert into the positioning grooves of the two conveying rods through the through end, and the two edges of the Velcro abut against the positioning grooves, allowing the Velcro to sit flat at the clearance hole.

[0010] In the aforementioned hook and loop fastener feeding sewing machine, the positioning groove is located on the transfer rod near the bottom. This structure allows the center of the hook and loop fastener to be directly attached to the fabric after the transfer frame moves the hook and loop fastener to the inside of the presser frame. The presser foot will not cause the hook and loop fastener to shift during the pressing process, thus ensuring accurate sewing position of the hook and loop fastener.

[0011] In another scenario, in the aforementioned Velcro feeding sewing machine, protruding support strips are provided on the inner walls of both conveyor rods. These support strips are positioned opposite each other, near the bottom of the conveyor rods. After the Velcro enters the slot between the two conveyor rods, its two edges abut against the corresponding support strips, allowing the Velcro to rest flatly at the clearance hole.

[0012] In the aforementioned Velcro feeding sewing machine, a reinforcing strip is fixed to the upper side of the transfer rod. The rear end of the reinforcing strip is fixedly connected to the connecting rod, and the reinforcing strip is in contact with the transfer rod. The reinforcing strip increases the bending strength of the transfer rod, keeping it straight and ensuring that the Velcro is positioned straight on the transfer frame. When the transfer frame is located inside the pressing frame, the transfer rod can be flat against the fabric, preventing it from poking the fabric.

[0013] In the aforementioned Velcro feeding sewing machine, the transfer mechanism includes a drive motor, a sliding bar, and a lifting cylinder. The Velcro conveyor includes a feeding table, the drive motor is fixed on the feeding table, a drive gear is fixed on the motor shaft of the drive motor, the sliding bar is slidably connected to the feeding table, a rack is fixed on one side of the sliding bar, the drive gear meshes with the rack, the cylinder rod of the lifting cylinder is fixedly connected to the front end of the sliding bar, a lifting frame is provided on the cylinder body of the lifting cylinder, and the transfer frame is fixedly connected to the lifting frame. The drive motor rotates, which moves the sliding bar back and forth. The lifting cylinder moves the cylinder body up and down with the lifting frame, realizing the forward and backward and up and down movement of the transfer frame. Specifically, the initial position of the transfer frame is aligned with the discharge port of the feeding table. The Velcro on the Velcro conveyor enters the transfer frame from the discharge channel. After the feeding is completed, the transfer frame moves upward to a position higher than the pressing frame, then moves forward to the inside of the pressing frame, and then moves downward to a position where the transfer frame is in contact with the fabric. After the feeding is completed, the transfer frame moves upward, backward, and downward to reset.

[0014] In the aforementioned Velcro-feed sewing machine, the sewing machine is equipped with a horizontal moving table. The horizontal moving table has a moving arm that drives the presser frame to move up and down. The presser frame has a sliding seat that can slide left and right. A lifting seat that can move up and down is mounted on the sliding seat. The Velcro presser foot is connected to the lifting seat. The presser frame moves upward to place the fabric onto the sewing table, pressing the fabric firmly onto the sewing table. The horizontal moving table drives the presser frame to move horizontally, allowing the presser frame to move with the pressed fabric. The Velcro presser foot, located on the presser frame, moves synchronously with it. When the Velcro presser foot moves upward, to the left, or backward to make room, it does not obstruct the view, allowing the worker to quickly place the fabric in position. The transfer frame can also be Velcro-moved to the inside of the presser frame. When the Velcro presser foot moves to the right and downward, it presses the Velcro on the transfer frame firmly onto the fabric.

[0015] In the aforementioned Velcro feeding sewing machine, a rotary cylinder is fixed on the lifting base, a rotary arm is fixed on the rotary cylinder's rotating shaft, and a connecting seat is fixed on the Velcro presser foot. The rotary arm is U-shaped, and its end is rotatably connected to the connecting seat. Magnets are fixed on both sides of the connecting seat, allowing the rotary arm to magnetically attract and fix itself to the corresponding magnets when rotated to a horizontal position. The U-shaped rotary arm's rotation allows for wrap-around sewing of the Velcro; the magnetic attraction between the magnets and the rotary arm prevents the Velcro presser foot from tilting.

[0016] This invention also proposes a sewing method for a Velcro feeding and sewing machine, which solves the technical problem of improving the quality and efficiency of sewing Velcro.

[0017] A sewing method for a Velcro-feed sewing machine, characterized by comprising the following steps:

[0018] A. The hook and loop conveyor transports the hook and loop tape to the transfer rack;

[0019] B. Place the fabric on the sewing station of the sewing table. After the fabric is in place, press the fabric frame to press the fabric firmly on the sewing table.

[0020] C. The transfer frame is lifted with the Velcro and moves to one side of the sewing table. After passing the presser foot, the transfer frame moves to the set position inside the presser foot. The transfer frame is lowered and pressed against the fabric. The Velcro presser foot presses the Velcro on the transfer frame firmly onto the fabric.

[0021] D. The transfer frame retracts and resets, and the presser foot and the hook and loop fastener move synchronously towards the sewing station with the fabric and hook and loop fastener respectively. The sewing machine sews the fabric and hook and loop fastener along the edge of the hook and loop fastener.

[0022] E. After completing the sewing of the fabric and Velcro, lift the presser foot and Velcro foot and return them to the sewing position. Remove the sewn fabric.

[0023] Sewing machines are equipped with markings, such as projected crosshairs or indicator bars. When the markings on the fabric align with these markings, the fabric is in place. This method ensures that the markings on the fabric are not obstructed by the presser foot during placement, allowing for quick fabric positioning and improved efficiency. Furthermore, the presser foot holds the Velcro fastener firmly to the fabric during sewing, preventing the center of the fastener from bulging relative to the fabric after sewing. This ensures the fastener adheres well to the fabric, improving product quality.

[0024] Compared with existing technologies, this hook and loop feed sewing machine has the advantages of simple structure and improved efficiency and quality of hook and loop sewing; the sewing method of this hook and loop feed sewing machine has the advantages of improving efficiency and quality of hook and loop sewing. Attached Figure Description

[0025] Figure 1 This is a 3D structural diagram of the transfer frame of the Velcro feeding sewing machine during material feeding.

[0026] Figure 2 This is a 3D structural diagram of the transfer frame of the Velcro feeding sewing machine during material feeding.

[0027] Figure 3 This is a 3D structural diagram of a Velcro-feed sewing machine during the sewing process.

[0028] Figure 4 This is a three-dimensional structural diagram of the assembly of the Velcro conveyor and the transfer mechanism.

[0029] Figure 5 This is a three-dimensional structural diagram of the transfer mechanism.

[0030] Figure 6 This is a three-dimensional structural diagram of the transfer rack.

[0031] Figure 7 This is a rear view structural diagram of the transfer rack.

[0032] Figure 8 This is a side view of the transfer rod and reinforcing strip.

[0033] Figure 9 This is a 3D structural diagram of the Velcro presser foot.

[0034] In the diagram, 1. Sewing machine; 11. Sewing table; 12. Pressing frame; 121. Horizontal moving table; 122. Moving arm; 123. Clearing groove; 13. Velcro presser foot; 131. Sliding seat; 132. Lifting seat; 133. Rotary cylinder; 134. Rotating arm; 135. Connecting seat; 136. Magnet; 2. Velcro conveyor; 21. Feeding table; 3. Transfer frame; 31. Transfer rod; 32. Positioning groove; 321. Through end; 322. Guide slope; 33. Connecting rod; 34. Strip hole; 341. Opening; 35. Reinforcing strip; 36. Notch; 4. Drive motor; 41. Drive gear; 42. Sliding strip; 43. Rack; 44. Lifting cylinder; 45. Lifting frame. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] Example 1

[0037] like Figures 1 to 9 As shown, the Velcro feeding sewing machine includes a sewing machine 1, a Velcro conveyor 2, and a transfer mechanism. The sewing machine 1 includes a sewing table 11, a presser frame 12 that can press the fabric onto the sewing table 11, and Velcro presser feet 13. The presser frame 12 has a clearance groove 123 on its upper side near the edge of the Velcro conveyor 2. The transfer mechanism includes a drive motor 4, a sliding bar 42, a lifting cylinder 44, and a transfer frame 3 that can move back and forth between the Velcro conveyor 2 and the sewing machine 1. In this embodiment, the transfer frame 3 moves forward toward the sewing machine 1. The transfer frame 3 includes two transfer rods 31, which are arranged in parallel. The rear ends of the two transfer rods 31 are connected to a connecting rod 33. A strip-shaped hole 34 is formed between the two transfer rods 31. The front end of the strip-shaped hole 34 is an opening 341. Positioning grooves 32 are formed along the length direction on the inner walls of the two transfer rods 31. The positioning grooves 32 are located near the bottom of the transfer rods 31. The end of the positioning groove 32 at the rear end of the transfer rod 31 is a through end 321. The through end 321 is provided with an guide slope 322 so that a flared mouth is formed between the through ends 321 of the two positioning grooves 32, guiding the Velcro into the positioning groove. In the groove 32, the positioning grooves 32 on the two transfer rods 31 are arranged opposite to each other. The two edges of the hook and loop conveyor 2 are located in the positioning grooves 32 respectively, so that the hook and loop is suspended at the strip hole 34. When the transfer frame 3 moves toward the sewing machine 1, the transfer frame 3 can move from above the pressing frame 12 pressed on the sewing table 11 to the inside of the pressing frame 12. When the transfer frame 3 moves to the inside of the pressing frame 12, the hook and loop presser foot 13 can be pressed into the strip hole 34 of the transfer frame 3.

[0038] A reinforcing strip 35 is fixed to the upper side of the transfer rod 31. The rear end of the reinforcing strip 35 is fixedly connected to the connecting rod 33. The reinforcing strip 35 is fitted and fixed to the transfer rod 31. A notch 36 is provided on the lower rear end of the reinforcing strip 35 and the upper rear end of the transfer rod 31. The connecting rod 33 is inserted into the notch 36 of the reinforcing strip 35 and the transfer rod 31. The rear end of the reinforcing strip 35 is fixedly connected to the connecting rod 33 by bolts. The reinforcing strip 35 keeps the transfer rod 31 straight.

[0039] The Velcro conveyor 2 includes a feeding table 21, a drive motor 4 fixed on the feeding table 21, a drive gear 41 fixed on the motor shaft of the drive motor 4, a sliding strip 42 slidably connected to the feeding table 21, a rack 43 fixed on one side of the sliding strip 42, the drive gear 41 meshing with the rack 43, the cylinder rod of the lifting cylinder 44 fixedly connected to the front end of the sliding strip 42, a lifting frame 45 provided on the cylinder body of the lifting cylinder 44, and a connecting rod 33 fixedly connected to the lifting frame 45. The rotation of the drive motor 4 drives the sliding strip 42 to move back and forth, and the lifting cylinder 44 enables the cylinder body to move up and down with the lifting frame 45, thus realizing the forward and backward and up and down movement of the transfer frame 3.

[0040] The sewing machine 1 is equipped with a horizontal moving table 121 that can move horizontally back and forth and left and right. The horizontal moving table 121 is equipped with a moving arm 122 that can drive the presser frame 12 to move up and down. The structures of the horizontal moving table 121 and the moving arm 122 are existing technologies. The presser frame 12 is equipped with a sliding seat 131 that can slide left and right. A lifting seat 132 that can move up and down is installed on the sliding seat 131. The Velcro presser foot 13 is connected to the lifting seat 132. A rotary cylinder 133 is fixed on the lifting seat 132. A rotary arm 134 is fixed on the rotating shaft of the rotary cylinder 133. A connecting seat 135 is fixed on the Velcro presser foot 13. The rotary arm 134 is U-shaped. The end of the rotary arm 134 is rotatably connected to the connecting seat 135. Magnets 136 are fixed on both sides of the connecting seat 135. When the rotary arm 134 rotates to the horizontal position, it can be magnetically attracted and fixed with the corresponding magnets 136. The fabric pressing frame 12 moves upward to place the fabric onto the sewing table 11, pressing the fabric firmly onto the sewing table 11. The horizontal moving table 121 can drive the fabric pressing frame 12 to move horizontally, thus moving the fabric pressing frame 12 with the pressed fabric. The hook and loop presser foot 13 is set on the fabric pressing frame 12 and can move synchronously with the fabric pressing frame 12. When the hook and loop presser foot 13 moves upward and to the left and backward, the transfer frame 3 moves the hook and loop to the inside of the fabric pressing frame 12. When the hook and loop presser foot 13 moves to the right and downward, it presses the hook and loop on the transfer frame 3 firmly onto the fabric.

[0041] The sewing method of the Velcro feeding sewing machine includes the following steps: The initial position of the transfer frame 3 is located at the outlet of the feeding table 21 of the Velcro conveyor 2, and the strip hole 34 of the transfer frame 3 is aligned with the outlet. This state is shown in the appendix. Figure 1The hook and loop conveyor 2 transports the hook and loop fasteners into the strip hole 34. The two edges of the hook and loop fasteners are inserted into the positioning grooves 32 of the transfer rod 31. When the hook and loop fasteners of the set length enter the transfer frame 3, the tape cutter on the hook and loop conveyor 2 cuts the tape, completing the feeding of the hook and loop fasteners. At this time, the worker places the fabric on the sewing table 11 at the waiting position. The hook and loop presser foot 13 is positioned away from the crosshair projected onto the sewing table 11. By aligning the mark on the fabric with the crosshair projected onto the sewing table 11, the fabric is placed in position. Then, the fabric presser frame 12 presses the fabric firmly onto the sewing table 11. This state is shown in the attached diagram. Figure 1 After pressing the fabric, the transfer frame 3, carrying the Velcro, is lifted and moves forward toward the sewing table 11. After passing the pressing frame 12, the transfer frame 3 moves to the inner set position of the pressing frame 12, above the fabric markings. At this point, the transfer frame 3 lowers and rests against the fabric. Then, the Velcro presser foot 13 moves and extends into the slot 34 of the transfer frame 3 to press the Velcro firmly onto the fabric. (See attached image for details.) Figure 2 After the fabric and hook and loop fastener are positioned, the conveyor frame 3 retracts and resets. The presser frame 12 and the hook and loop fastener foot 13 move synchronously towards the sewing station, carrying the fabric and hook and loop fastener respectively. When the needle is aligned with the edge of the hook and loop fastener, the presser frame 12 and the hook and loop fastener foot 13 move horizontally, back and forth, left and right, so that the needle sews around the edge of the hook and loop fastener. This state is shown in the appendix. Figure 3 During this process, the rotating arm 134 rotates 180° so that the sewing needle can go around once; after the fabric and Velcro are sewn together, the presser frame 12 and the Velcro presser foot 13 are lifted and returned to the sewing position, and the worker removes the sewn fabric.

[0042] In this embodiment, both the Velcro conveyor 2 and the sewing machine 1 are existing products.

[0043] Example 2

[0044] This embodiment is basically the same as Embodiment 1 in structure and principle, except that: both transfer rods have protruding support strips on their opposing inner walls, and the support strips on the two transfer rods are positioned opposite each other, with the support strips located near the bottom of the transfer rods. After the Velcro enters the strip hole between the two transfer rods, its two edges abut against the corresponding support strips, allowing the Velcro to be placed flat at the clearance hole.

[0045] Example 3

[0046] This embodiment is basically the same in structure and principle as Embodiment 1, except that: several threaded holes are provided along the length of the connecting rod, and the rear end of the reinforcing strip is screwed to the corresponding threaded holes on the connecting rod by bolts. In this embodiment, the spacing between the two connecting rods is adjustable to accommodate Velcro of different widths and sizes.

[0047] Example 4

[0048] This embodiment is basically the same as the first embodiment in terms of structure and principle. The difference is that the hook and loop conveying mechanism also includes a translation cylinder, a slider and a lifting cylinder. The hook and loop conveyor includes a feeding table. The translation cylinder is horizontally fixed on the feeding table. The slider is fixed on the cylinder rod of the translation cylinder. The cylinder rod of the lifting cylinder is fixedly connected to the slider. The cylinder body of the lifting cylinder is provided with a lifting frame. The transfer frame is fixedly connected to the lifting frame.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A Velcro-feed sewing machine, comprising a sewing machine (1), a Velcro conveyor (2), and a transfer mechanism, wherein the sewing machine (1) includes a sewing table (11), and the sewing machine (1) is provided with a presser frame (12) and a Velcro presser foot (13) capable of pressing the fabric onto the sewing table (11), characterized in that, The transfer mechanism includes a transfer frame (3) that can move back and forth between the hook and loop conveyor (2) and the sewing machine (1). The transfer frame (3) is provided with a strip hole (34). The transfer frame (3) can suspend the hook and loop conveyor (2) at the strip hole (34). When the transfer frame (3) moves toward the sewing machine (1), the transfer frame (3) can move from above the presser frame (12) pressed on the sewing table (11) to the inside of the presser frame (12). When the transfer frame (3) moves to the inside of the presser frame (12), the hook and loop presser foot (13) can be pressed into the strip hole (34) of the transfer frame (3).

2. The Velcro feeding sewing machine according to claim 1, characterized in that, The transfer frame (3) includes two transfer rods (31), which are arranged in parallel. The strip hole (34) is formed between the two transfer rods (31), and the rear ends of the two transfer rods (31) are connected to a connecting rod (33).

3. The Velcro feeding sewing machine according to claim 2, characterized in that, Positioning grooves (32) are provided on the inner walls of the two transfer rods (31) respectively. The end of the positioning groove (32) located at the rear end of the transfer rod (31) is a through end (321).

4. The Velcro feeding sewing machine according to claim 3, characterized in that, The positioning groove (32) is located on the transfer rod (31) near the bottom.

5. The Velcro feeding sewing machine according to claim 2, characterized in that, Both of the two transfer rods (31) have protruding support bars on their inner walls. The support bars on the two transfer rods (31) are arranged opposite each other and are located near the bottom of the transfer rods (31).

6. The Velcro feeding sewing machine according to claim 2, 3, 4, or 5, characterized in that, A reinforcing strip (35) is fixed on the upper side of the transfer rod (31). The rear end of the reinforcing strip (35) is fixedly connected to the connecting rod (33). The reinforcing strip (35) is in contact with the transfer rod (31).

7. The Velcro feeding sewing machine according to any one of claims 1 to 5, characterized in that, The transfer mechanism includes a drive motor (4), a sliding bar (42), and a lifting cylinder (44). The Velcro conveyor (2) includes a feeding table (21). The drive motor (4) is fixed on the feeding table (21). A drive gear (41) is fixed on the motor shaft of the drive motor (4). The sliding bar (42) is slidably connected to the feeding table (21). A rack (43) is fixed on one side of the sliding bar (42). The drive gear (41) meshes with the rack (43). The cylinder rod of the lifting cylinder (44) is fixedly connected to the front end of the sliding bar (42). A lifting frame (45) is provided on the cylinder body of the lifting cylinder (44). The transfer frame (3) is fixedly connected to the lifting frame (45).

8. The Velcro-feed sewing machine according to any one of claims 1 to 5, characterized in that, The sewing machine (1) is provided with a horizontal moving platform (121), the horizontal moving platform (121) is provided with a moving arm (122) that can drive the presser frame (12) to move up and down, the presser frame (12) is provided with a sliding seat (131) that can slide left and right, the sliding seat (131) is provided with a lifting seat (132) that can move up and down, and the Velcro presser foot (13) is connected to the lifting seat (132).

9. The Velcro feeding sewing machine according to claim 8, characterized in that, A rotary cylinder (133) is fixed on the lifting seat (132). A rotary arm (134) is fixed on the rotating shaft of the rotary cylinder (133). A connecting seat (135) is fixed on the Velcro presser foot (13). The rotary arm (134) is U-shaped. The end of the rotary arm (134) is rotatably connected to the connecting seat (135). Magnets (136) are fixed on both sides of the connecting seat (135) on both sides of the rotary arm (134). When the rotary arm (134) is rotated to a horizontal position, it can be magnetically attracted and fixed with the corresponding magnet (136).

10. A sewing method for a Velcro-feed sewing machine as described in any one of claims 1-9, characterized in that, The sewing method includes the following steps: A. The hook and loop conveyor (2) transports the hook and loop to the transfer rack (3); B. Place the fabric on the sewing table (11) at the sewing station. After the fabric is in place, press the fabric frame (12) to press the fabric firmly on the sewing table (11). C. The transfer frame (3) is lifted with the Velcro and moves to the side of the sewing table (11). After passing the presser frame (12), the transfer frame (3) moves to the set position inside the presser frame (12). The transfer frame (3) is lowered and pressed against the fabric. The Velcro presser foot (13) presses the Velcro on the transfer frame (3) firmly onto the fabric. D. The transfer frame (3) retracts and resets, the presser frame (12) and the Velcro presser foot (13) move synchronously towards the sewing station with the fabric and Velcro respectively, and the sewing machine (1) sews the fabric and Velcro along the edge of the Velcro. E. After completing the sewing of the fabric and Velcro, lift the presser foot (12) and Velcro presser foot (13) and return them to the sewing position, and remove the sewn fabric.

Images