Zipper box automatic sewing machine

Abstract

The utility model relates to the technical field of bag sewing, and provides an automatic sewing machine for a zipper box, which is used for solving the problem of unsafety of manual flanging operation and comprises a rack, an operation table top is arranged on the rack, a sewing machine is arranged on the operation table top, and a sewing guide block is arranged on a machine base of the sewing machine. The sewing guide block is detachably arranged on a machine base of the sewing machine, a positioning protrusion is arranged at the position, located below a needle head of the sewing machine, of the sewing guide block in an upward protruding mode, a sewing channel is vertically formed in the positioning protrusion in a penetrating mode, and the front end face and the rear end face of the positioning protrusion are arc-shaped faces adapting to corners of an external extrusion frame. A flanging block is arranged on the side, close to the inner side face of the sewing machine body, of the sewing guide block, an arc-shaped turning face is arranged on the outer side face of the flanging block, a sewing opening is formed in the flanging block in an up-down penetrating mode, and a first driving structure is arranged on the rack.

Description

Technical Field

[0001] This utility model relates to the field of luggage sewing technology, and in particular to an automatic sewing machine for zippered luggage. Background Technology

[0002] A zippered case is a type of luggage, mainly composed of two semi-enclosed case bodies, an extruded frame sewn onto the edges of the case bodies, and a zipper sewn onto the extruded frame. For the specific assembly structure of the case body, extruded frame, and zipper, please refer to Chinese Utility Model Patent Application No. CN118979347A. One possible assembly method of the case body 1, extruded frame 2, and zipper 3 is as follows: Figure 1 As shown, the upper end of the extrusion frame forms an upper clamping groove 4 and a lower clamping groove 5 with openings facing opposite directions. The lower end of the extrusion frame has a sewing guide groove 6 facing upwards from the lower end. The extrusion frame is clamped to the edge of the box body through the lower clamping groove. The zipper is clamped to the extrusion frame through the upper clamping groove. When sewing, the upper flap 7 of the upper clamping groove needs to be flipped open so that the sewing machine needle can pass vertically through the zipper and the box body into the sewing guide groove and sew continuously. After sewing, the upper flap clamps the zipper again and covers the sewing track.

[0003] Currently, the stitching between the box body, extrusion frame, and zipper relies on manual labor. This requires manually opening the top flap, which is made of soft plastic. The opening position needs to be close to the needle to avoid the top flap obstructing the needle from sewing, making the operation highly dangerous.

[0004] This case arose in order to resolve the aforementioned issues. Utility Model Content

[0005] Therefore, in view of the above problems, this utility model proposes an automatic sewing machine for zipper boxes to solve the problem of unsafe manual hemming operations.

[0006] To solve the above-mentioned technical problems, the solution adopted by this utility model is as follows: an automatic sewing machine for zipper boxes, including a frame, an operating table on the frame, and a sewing machine on the operating table. The sewing machine base is provided with a sewing guide block for positioning and guiding the extrusion frame into a sewing guide groove. The sewing guide block is detachably mounted on the sewing machine base. The sewing guide block, located below the needle of the sewing machine, has an upwardly protruding positioning protrusion for inserting into the sewing guide groove of the external extrusion frame. The left and right sides of the positioning protrusion are in contact with the inner wall of the sewing guide groove of the external extrusion frame. A sewing channel, vertically penetrating the positioning protrusion and communicating with the sewing opening on the sewing machine base, is provided. The front and rear end faces of the positioning protrusion are arc-shaped surfaces adapted to the corners of the external extrusion frame.

[0007] The sewing guide block has a flanged block on its inner side near the sewing machine body. The outer surface of the flanged block has an arc-shaped flap for inserting into the upper clamping groove of the outer extrusion frame and guiding the upper flap to flip outwards. The flanged block has sewing openings extending vertically to allow the sewing machine needle to move up and down for sewing as the arc-shaped flap continuously flips up the outer upper flap. The machine frame has a mechanism for driving the flanged block to insert the arc-shaped flap into the flipped outer upper flap, and for sliding it back and forth during insertion to ensure the arc-shaped flap enters the outer frame. The machine frame includes an upper clamping groove for the extrusion frame and a first driving structure for resetting the flanging block; a thread cutting structure for automatically cutting the sewing thread when the sewing machine needle is lifted after sewing is completed, replacing manual cutting; a zipper feeding structure for automatically inserting the zipper into the upper clamping groove of the external extrusion frame after the upper flap is flipped up, replacing manual cutting; a zipper cutting structure for automatically cutting the zipper, replacing manual cutting; and a zipper feeding structure for supplying a zipper of a set length to the zipper feeding structure.

[0008] A further improvement is made to the first drive structure, which includes a first bracket, a first telescopic drive member, and a second telescopic drive member. The fixed end of the first bracket is fixedly mounted on the frame or the housing of the sewing machine. The housing of the first telescopic drive member is fixedly mounted on the free end of the first bracket, and the telescopic rod extends and retracts in the front-to-back direction. The housing of the second telescopic drive member is fixedly mounted on the housing of the first telescopic drive member, and the telescopic rod extends and retracts in the left-to-right direction. The flange block is fixedly mounted on the telescopic rod of the second telescopic drive member.

[0009] A further improvement is made to the stitch cutting structure, which includes a second bracket, a first electric scissor, and a third telescopic drive. The fixed end of the second bracket is fixedly mounted on the frame or the housing of the sewing machine. The housing of the third telescopic drive is fixedly mounted on the free end of the second bracket. The first electric scissor is fixedly mounted on the telescopic rod of the third telescopic drive. The first electric scissor is inclinedly positioned above the stitching guide block.

[0010] A further improvement is made to the zipper feeding structure, which includes a feeding plate, a third bracket, a fourth telescopic drive component, and a drive rod. The fixed end of the third bracket is fixedly mounted on the frame. The housing of the fourth telescopic drive component is fixedly mounted on the free end of the third bracket. The drive rod is fixedly mounted on the telescopic rod of the fourth telescopic drive component. The feeding plate is obliquely fixedly mounted on the drive rod above the sewing guide block. The feeding plate has a feeding channel for external zippers to pass through. The feeding end of the feeding plate is provided with a clamping structure for damping and holding the zipper to prevent it from sliding.

[0011] A further improvement is made to the clamping structure, which includes an upper clamping roller, a lower clamping roller, a support rod, a lower limit block, and an upper limit block. The support rod is fixedly mounted on the drive rod, and a fixing rod is provided on the support rod along the parallel zipper conveying direction. The lower clamping roller is rotatably mounted on the fixing rod. Lower limit blocks for limiting the slippage of the lower clamping roller are provided on both sides of the fixing rod. The fixed ends of the lower limit blocks are fixedly mounted on the fixing rod. A roller passes through the upper clamping roller, and a lower limit block is provided on the roller along the parallel zipper conveying direction. Upper limit blocks are fixedly sleeved on both sides of the upper clamping roller. The fixed ends of the upper limit blocks are fixedly set on the roller. The middle of the two upper limit blocks is in contact with the inner wall of the middle of the two lower limit blocks. A damping shaft is provided between the upper limit blocks and the lower limit blocks to keep the upper clamping roller and the lower clamping roller in a clamped state. One end of the damping shaft is fixedly inserted through the middle of the lower limit block, and the other end is fixedly inserted through the middle of the upper limit block. A feeding gap is left between the upper clamping roller and the lower clamping roller for the zipper to squeeze through.

[0012] A further improvement is that a guide structure is provided between the third bracket and the feeding plate to guide the feeding plate to smoothly drive the zipper into the upper clamping groove of the outer extrusion frame.

[0013] A further improvement is made to the guide structure, which includes a mounting plate, a guide plate, a guide rail, a slider, and a drive block. The mounting plate is fixedly mounted on the free end of the third bracket. The housing of the fourth telescopic drive component is fixedly mounted on the mounting plate. The slider is fixedly mounted on the mounting plate. The guide rail is fixedly mounted on the guide plate and slides on the slider. One end of the drive block is fixedly mounted on the telescopic rod of the fourth telescopic drive component, and the other end is fixedly mounted on the guide plate. The drive rod is fixedly mounted on the guide plate.

[0014] A further improvement is made to the zipper cutting structure, which includes a fourth bracket, a fifth telescopic drive component, and a second electric scissors. The fixed end of the fourth bracket is fixedly mounted on the frame. The housing of the fifth telescopic drive component is fixedly mounted on the free end of the fourth bracket, and the telescopic rod extends and retracts in the left and right directions. The housing of the second electric scissors is fixedly mounted on the telescopic rod of the fifth telescopic drive component.

[0015] A further improvement is that the zipper feeding structure includes a mounting base, feeding rollers for actively feeding the zipper, and several guide wheels for guiding the free end of the zipper to the zipper feeding structure. The feeding rollers are rotatably mounted on the mounting base, and the several guide wheels are horizontally or inclinedly mounted on the frame along the zipper conveying path. The frame is provided with a second drive structure for driving the feeding rollers to rotate synchronously.

[0016] A further improvement is made to the second drive structure, which includes a motor, two rotating rods, and two synchronous gears. The two ends of the rotating rods are rotatably mounted on the mounting base. The feeding rollers are fixedly sleeved on the two rotating rods. The two synchronous gears are fixedly sleeved on the rotating rods and mesh with each other for transmission. The motor housing is fixedly mounted on the mounting base. The rotating shaft of the motor is synchronously connected to one of the rotating rods.

[0017] A further improvement is that sliders are fixedly installed at both ends of the rotating rod located above, and a groove is provided on the mounting base for the sliders to slide up and down. An elastic element is provided in the groove above the slider, with the upper end of the elastic element located at the top of the groove and the lower end located on the upper surface of the slider.

[0018] A further improvement is that the frame is equipped with a tensioning structure for using gravity to tension the pre-released zipper when the feed rollers release a set length of zipper, preventing it from detaching from the guide wheel.

[0019] A further improvement is made to the tensioning structure, which includes two tensioning wheels, two tensioning slide rails, a tensioning slider, and at least one anti-detachment tensioning wheel. The two tensioning wheels are rotatably fixed on the frame. The tensioning slide rails are vertically fixed on the frame below the tensioning wheels. The tensioning slider is slidably mounted on the tensioning slide rails. A connecting rod is fixed between the two anti-detachment tensioning wheels, and the middle part of the connecting rod is fixed on the tensioning slider.

[0020] A further improvement is that the anti-detachment tensioning wheel includes two limiting plates, two limiting rods, and a roller. The two limiting rods are located between the two limiting plates and are respectively fixed at the upper and lower ends of the limiting plates. The roller is sleeved on the upper limiting rod, and an anti-detachment guide opening is formed between the roller and the lower limiting rod to allow the external zipper to pass through and prevent the zipper from detaching.

[0021] A further improvement is that the frame is equipped with a feeding tray for placing external zipper rolls, and a sleeve rod for the external zipper roll to be inserted is vertically arranged in the middle of the feeding tray.

[0022] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0023] In this case, the positioning protrusion on the sewing guide block cooperates with the sewing guide groove of the extrusion frame, so that the box can rotate smoothly. Moreover, the front and back of the positioning protrusion are arc-shaped, which can adapt well to the arc corners of the extrusion frame.

[0024] This design replaces manual flanging with a flanging block, improving the safety of the sewing operation. The curved facet on the flanging block helps guide the upper flap of the extrusion frame to fold outwards. The flanging block is inserted into the clamping groove on the extrusion frame by sliding and inserting, avoiding situations where the upper flap fails to fold or is not properly positioned.

[0025] Further beneficial effects include: the automatic cutting of sewing threads using a thread-cutting structure eliminates the need for manual cutting, improving operator safety. Using a cylinder to drive electric scissors close to the thread allows for automatic cutting, enabling adjustments and control to ensure the scissors are positioned as close as possible to the sewing machine needle, thus shortening thread length, increasing thread utilization, and reducing consumable costs.

[0026] Further beneficial effects include: the zipper feeding structure automatically places the zipper into the upper clamping groove of the extrusion frame, replacing manual zipper feeding, improving operational safety, and enhancing the level of automated sewing of the box. The upper and lower clamping rollers restrict the zipper's autonomous movement, facilitating zipper head positioning and easy insertion into the upper clamping groove of the outer extrusion frame. During sewing, the zipper is pulled and sewn onto the extrusion frame as the box rotates. The zipper's traction by the box's rotation ensures that the zipper's traction length is synchronized with the box's flipping and sewing path length. The clamping of the upper and lower rollers helps maintain the zipper's flatness throughout the sewing process, improving the zipper sewing quality.

[0027] A further beneficial effect is that the guide structure set between the third bracket and the feeding plate restricts the movement of the feeding plate in the left and right directions, which helps to guide the feeding plate to quickly and smoothly insert the zipper into the upper clamping groove of the outer extrusion frame.

[0028] Further beneficial effects include: using a second electric scissor to automatically cut the zipper, improving the automation level of the box sewing, and enabling subsequent automated equipment such as robotic arms to completely replace manual clamping and driving of the box, further improving the automation level of box sewing.

[0029] Further beneficial effects include: the frame is also equipped with a zipper feeding structure capable of supplying zippers of a set length. The zipper is clamped on the clamping rollers. Before the previous section of zipper is cut, the clamping rollers rotate to feed the zipper. After the zipper is fed to the set length, the clamping rollers stop rotating. By pre-feeding the zipper, if the tail of the zipper detaches from the feeding roller during the feeding process, and the remaining zipper scatters on the ground, the staff or detection sensors can detect this immediately and stop sewing the box in time, avoiding the sewing of defective boxes that require rework. This allows for quick manual response, enabling the timely replacement of the zipper roll if there is insufficient remaining zipper for sewing, preventing the sewing of excess zipper waste onto the box. By controlling the tension slider at the lowest position of the tensioning slide rail and the position of the guide wheel, the total length of the zipper after pre-feeding is controlled. This total length is approximately twice the sewing zipper length, ensuring that the length of the zipper after the tail of the zipper detaches from the feeding roller is sufficient to sew the current box.

[0030] A further beneficial effect is that the tensioning structure set on the frame will use its own weight to lower and tension the pre-released zipper when the feeding roller releases the zipper of a set length. During the consumption of the pre-released zipper, it will use its own weight to counteract the zipper traction force to keep the zipper taut, thus preventing the pre-released zipper from getting tangled or falling off and affecting manual walking.

[0031] The zipper sequentially passes over a tensioning roller, two anti-detachment tensioning rollers, and another tensioning roller, then around other guide rollers, and finally passes through the feeding channel of the feeding plate. During pre-feeding by the clamping rollers, the tensioning slider descends along the tensioning rail to tension the zipper, preventing it from detaching from the guide rollers. When manual inspection or sensors detect that the tail of the zipper is about to detach from the rotating feeding rollers, or has already detached, it indicates that the remaining zipper length is insufficient to sew the next box after the current box is sewn. In this case, manual replacement of the zipper roll and removal of excess zipper waste are necessary. This helps avoid situations where insufficiently long zippers are sewn onto the box, requiring rework and improving production efficiency.

[0032] Further beneficial effects are: the clamping structure set in this case actively clamps the front end of the zipper, preventing the cut zipper from sliding along the feeding plate and shortening its length, and preventing the feeding plate from failing to send the zipper head into the upper clamping groove of the outer extrusion frame. This helps to improve the positional accuracy of the zipper when it is fed into the extrusion frame and improve the zipper sewing quality.

[0033] A further beneficial effect is that the feeding tray and sleeve rod on the frame for placing zipper rolls help to shorten the zipper traction distance and prevent the traction of the zipper from affecting the workers' walking. Attached Figure Description

[0034] Figure 1 The accompanying drawings are illustrations describing the prior art in the background section.

[0035] Figure 2 This is a three-dimensional structural diagram of the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0036] Figure 3 This is a front view structural diagram of the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0037] Figure 4 This is a side view of the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0038] Figure 5 This is a top view of the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0039] Figure 6 This is a schematic diagram of the stitching guide block, the flanging block, and the stitch cutting structure in the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0040] Figure 7 This is a schematic diagram of the zipper feeding structure in the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0041] Figure 8 This is a schematic diagram of the zipper feeding structure and clamping structure in the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0042] Figure 9 This is a schematic diagram of the zipper feeding structure in the automatic sewing machine for zipper boxes according to an embodiment of this utility model.

[0043] Figure 10 yes Figure 2 Enlarged view of the local structure at point A in the middle.

[0044] Figure 11 This is a three-dimensional structural diagram of the automatic sewing machine for zipper boxes according to an embodiment of this utility model. Detailed Implementation

[0045] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0046] refer to Figures 1 to 11The present invention discloses an automatic sewing machine for zipper boxes, including a frame 10, an operating table 11 on the frame 10, a sewing machine 12 on the operating table 11, the sewing end of the sewing machine 12 extending beyond the operating table 11, and a sewing guide block 13 on the base of the sewing machine 12 for positioning and guiding the extrusion frame into the sewing guide groove. The sewing guide block 13 is bolted to the base of the sewing machine 12 to facilitate the replacement of different sewing guide blocks 13 according to different models of boxes. The sewing guide block 13 is located below the needle of the sewing machine 12 and has an upwardly protruding positioning protrusion 131 for extending into the sewing guide groove of the outer extrusion frame. The left and right sides of the positioning protrusion 131 are in contact with the inner wall of the sewing guide groove of the outer extrusion frame. A sewing channel 132 is vertically opened in the positioning protrusion 131 and communicates with the sewing opening on the machine base of the sewing machine 12. The front and rear end faces of the positioning protrusion 131 are arc-shaped surfaces 133 adapted to the corners of the outer extrusion frame. The sewing guide block 13 is close to the sewing machine 12. One side of the inner surface of the machine body is provided with a flanging block 14 for replacing manual flanging. The outer surface of the flanging block 14 is provided with an arc-shaped flipping surface 141 for inserting into the upper clamping groove of the outer extrusion frame and guiding the upper flipping piece to flip outward. The highest point of the arc-shaped flipping surface 141 is higher than the upper surface of the flanging block 14 to increase the height of the arc-shaped flipping surface 141 and increase the flipping arc. The flanging block 14 is provided with a sewing opening 142 through its upper and lower parts for the sewing machine 12 needle to move up and down to sew when the arc-shaped flipping surface 141 continuously flips up the outer upper flipping piece. During sewing, the needle of the sewing machine 12 passes through the sewing opening 142 and the sewing channel 132 in sequence to sew. The frame 10 is provided with a first drive structure 15 for driving the flanging block 14 to move so that the arc-shaped flipping surface 141 inserts into the flipped outer upper flipping piece, sliding back and forth to ensure that the arc-shaped flipping surface 141 enters the upper clamping groove of the outer extrusion frame during insertion, and driving the flanging block 14 to reset.

[0047] The first drive structure 15 includes a first bracket 151, a first telescopic drive member 152, and a second telescopic drive member 153. The first telescopic drive member 152 and the second telescopic drive member 153 are cylinders, hydraulic cylinders, or electric push rods. The fixed end of the first bracket 151 is fixedly mounted on the housing of the frame 10 or the sewing machine 12. The housing of the first telescopic drive member 152 is fixedly mounted on the free end of the first bracket 151, and the telescopic rod extends and retracts in the front-back direction. The housing of the second telescopic drive member 153 is fixedly mounted on the housing of the first telescopic drive member 152, and the telescopic rod extends and retracts in the left-right direction. The flange block 14 is fixedly mounted on the telescopic rod of the second telescopic drive member 153.

[0048] The frame 10 is equipped with a thread-cutting structure 16 for automatically cutting the thread when the needle of the sewing machine 12 is lifted after sewing is completed, replacing manual cutting. The thread-cutting structure 16 includes a second bracket 161, a first electric scissors 162 or a blade with a V-shaped cut, and a third telescopic drive 163, which is a cylinder, a hydraulic cylinder, or an electric push rod. The fixed end of the second bracket 161 is fixedly mounted on the housing of the frame 10 or the sewing machine 12, the housing of the third telescopic drive 163 is fixedly mounted on the free end of the second bracket 161, and the first electric scissors 162 or the blade is fixedly mounted on the telescopic rod of the third telescopic drive 163. The first electric scissors 162 or the blade is inclined above the sewing guide block 13.

[0049] The frame 10 is equipped with a zipper feeding structure 17 for automatically inserting zippers into the upper clamping groove of the external extrusion frame after the upper flap is flipped up, replacing manual operation. The zipper feeding structure includes a feeding plate 171, a third support 172, a fourth telescopic drive 173, and a drive rod 175. The fixed end of the third support 172 is fixedly mounted on the frame 10. The housing of the fourth telescopic drive 173 is fixedly mounted on the free end of the third support 172. The drive rod 175 is fixedly mounted on the telescopic rod of the fourth telescopic drive 173. The feeding plate 171 is located above the sewing guide block 13 and is obliquely fixedly mounted on the drive rod 175. The feeding plate 171 has a feeding channel 174 for the external zipper to pass through. The feeding plate 171 is composed of an upper plate and a lower plate. The upper plate and the lower plate close the feeding channel 174 to prevent the zipper from detaching from the feeding plate 171. The feeding plate 171 consists of an upper plate and a lower plate. The upper and lower plates close the feeding channel 174 to prevent the zipper from detaching from the feeding plate 171. The feeding plate 171 can also be replaced by a clamping roller or other structure that can clamp the zipper without affecting the feeding of the zipper.

[0050] The feeding end of the feeding plate 171 is provided with a clamping structure 27 for damping and clamping to prevent the zipper from sliding. The clamping structure 27 includes an upper clamping roller 271, a lower clamping roller 272, a support rod 273, a lower limit block 274, and an upper limit block 275. The support rod 273 is fixedly mounted on the drive rod 175. A fixing rod 276 is provided on the support rod 273 along the parallel zipper conveying direction. The lower clamping roller 272 is rotatably mounted on the fixing rod 276. Lower limit blocks 277 for limiting the sliding of the lower clamping roller 272 are provided on both sides of the fixing rod 276. The fixed end of the lower limit block 274 is fixedly mounted on the fixing rod. A roller 278 passes through the upper clamping roller 271. A roller 278 is provided on the upper clamping roller 271. Upper clamping roller 271 is fixedly fitted with upper limit blocks 275 on both sides. The fixed ends of the upper limit blocks 275 are fixedly mounted on the roller 278. The middle of the two upper limit blocks 275 is in contact with the inner wall of the middle of the two lower limit blocks 274. A damping shaft 281 is provided between the upper limit blocks 275 and the lower limit blocks 274 to keep the upper clamping roller 271 and the lower clamping roller 272 in a clamped state. One end of the damping shaft 281 is fixedly inserted through the middle of the lower limit block 274, and the other end is fixedly inserted through the middle of the upper limit block 275. A feeding gap 279 is left between the upper clamping roller 271 and the lower clamping roller 272 for the zipper to squeeze through. The upper limit block 275 and the lower limit block 274 on the same side are respectively fixedly provided with handles 280 for driving the upper clamping roller 271 and the lower clamping roller 272 to release or clamp the zipper around the damping shaft 281 as the rotation center. Connecting rods for increasing rotational stability are respectively provided between the two ends of the upper limit block 275 and between the two ends of the lower limit block 274. The handles 280 drive the upper limit block 275 and the lower limit block 274 to rotate around the damping shaft 281 as the rotation center, thereby increasing the feeding gap 279 between the upper clamping roller 271 and the lower clamping roller 272 to facilitate the zipper to pass through. After the zipper passes through, the handles 280 drive the upper limit block 275 and the lower limit block 274 to rotate again, causing the upper clamping roller 271 and the lower clamping roller 272 to clamp the zipper and restrict the zipper's free movement.

[0051] After the zipper is sewn, the fourth telescopic drive 173 drives the feeding plate 171 to move away from the needle, extending the exposed zipper length between the feeding plate 171 and the needle to facilitate zipper cutting. After the zipper is cut, the front end of the zipper continues to be sewn with the extrusion frame as the box rotates, while the rear end of the zipper head maintains its exposed length under the clamping of the upper and lower clamping rollers. After the positioning protrusion 131 is engaged in the extrusion frame of the next box and the flange block 14 completes the flange, the fourth telescopic drive 173 drives the feeding plate 171 to move towards the needle, so that the zipper head exposed at the discharge end of the feeding plate 171 enters the sewing position for sewing.

[0052] A guide structure 18 is provided between the third support 172 and the feeding plate 171 to guide the feeding plate 171 to smoothly and linearly drive the zipper into the upper clamping groove of the outer extrusion frame. The guide structure 18 includes a mounting plate 181, a guide plate 182, a guide rail 183, a slider 214, and a drive block 185. The mounting plate 181 is fixedly mounted on the free end of the third support 172. The housing of the fourth telescopic drive member 173 is fixedly mounted on the mounting plate 181. The slider 214 is fixedly mounted on the mounting plate 181. The guide rail 183 is fixedly mounted on the guide plate 182 and slidably mounted on the slider 214. One end of the drive block 185 is fixedly mounted on the telescopic rod of the fourth telescopic drive member 173, and the other end is fixedly mounted on the guide plate 182. The drive rod is fixedly mounted on the guide plate 182. The guide rail 183 and slider 214 can also be replaced by a guide rod and a guide cylinder sleeved on the guide rod.

[0053] The frame 10 is equipped with a zipper cutting structure 19 for automatically cutting zippers, replacing manual cutting. The zipper cutting structure 19 includes a fourth support 191, a fifth telescopic drive 192, and a second electric scissors 193 or a sharp blade. The fourth telescopic drive 193 is a cylinder, hydraulic cylinder, or electric push rod. The fixed end of the fourth support 191 is fixedly mounted on the frame 10. The housing of the fifth telescopic drive 192 is fixedly mounted on the free end of the fourth support 191, and its telescopic rod extends and retracts in the left-right direction. The housing or blade of the second electric scissors 193 is fixedly mounted on the telescopic rod of the fifth telescopic drive 192.

[0054] The frame 10 is provided with a zipper feeding structure 20 for supplying zippers of a set length to the zipper feeding structure. The zipper feeding structure 20 includes a mounting base 201, a feeding roller 202 for actively feeding the zipper, and a plurality of guide wheels 203 for guiding the free end of the zipper to the zipper feeding structure. The feeding roller 202 is rotatably mounted on the mounting base 201, and the plurality of guide wheels 203 are horizontally or inclinedly mounted on the frame 10 along the zipper conveying path. The frame 10 is provided with a second drive structure for driving the feeding roller to rotate synchronously.

[0055] The second drive structure includes a motor 211, two rotating rods 212, and two synchronous gears 213. Both ends of the rotating rods 212 are rotatably mounted on the mounting base 201. Slider blocks 214 are fixedly mounted on both ends of the upper rotating rods 212. The mounting base 201 has a groove 215 for the sliders 214 to slide up and down. An elastic element 216, which is a spring, is disposed above the sliders 214 within the groove 215. The top of the slide 215 and the bottom of the slide block 214 are respectively disposed on the slide 215. The feeding rollers 202 are respectively fixedly sleeved on the two rotating rods 212. The two synchronous gears 213 are respectively fixedly sleeved on the rotating rods 212. The two synchronous gears 213 mesh with each other for transmission. The housing of the motor 211 is fixedly disposed on the mounting base 201. The rotating shaft of the motor 211 and one of the rotating rods 212 are synchronously connected to the pulley 218 through the belt 217.

[0056] The frame 10 is equipped with a tensioning structure 22 for using gravity to tension the pre-released zipper when the feeding roller 202 pre-releases a set length of zipper, and for maintaining the zipper tension using the gravity of the tensioning slider during the consumption of the pre-released zipper. The tensioning structure 22 includes two tensioning rollers 221, a tensioning slide rail 222, a tensioning slider 223, and at least one anti-detachment tensioning roller 23. The two tensioning rollers 221 are rotatably fixed on the frame 10. The tensioning slide rail 222 is vertically fixed on the frame 10 below the tensioning rollers 221. The tensioning slider 223 is slidably disposed on the tensioning slide rail 222. The anti-detachment tensioning roller 23 is rotatably disposed on the tensioning slider 223. There are two anti-detachment tensioning wheels 23, and a connecting rod 24 is fixedly arranged between the anti-detachment tensioning wheels 23. The middle part of the connecting rod 24 is fixedly arranged on the tensioning slider 223. Extending the length of the connecting rod 24 is beneficial to increasing the range of the pre-release length of the zipper.

[0057] The anti-detachment tensioning wheel 23 includes two limiting plates 231, two limiting rods 232, and a roller 233. The two limiting rods 232 are located between the two limiting plates 231 and are fixedly installed at the upper and lower ends of the limiting plates 231, respectively. The roller 233 is sleeved on the upper limiting rod 232. The roller 233 and the lower limiting rod 232 form an anti-detachment guide opening 234 for the external zipper to pass through and for preventing the zipper from detaching.

[0058] The frame 10 is provided with a feeding tray 25 for placing external zipper rolls, and a sleeve rod 26 for the external zipper roll to be inserted is vertically arranged in the middle of the feeding tray 25.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions above are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A zipper box automatic sewing machine, comprising a machine frame, an operation table top is arranged on the machine frame, and a sewing machine is arranged on the operation table top, characterized in that: The sewing machine base is provided with a sewing guide block for positioning and guiding the external extrusion frame into the sewing guide slot, the sewing guide block is detachably arranged on the sewing machine base, the sewing guide block is upwardly protrudingly arranged below the needle of the sewing machine, a positioning protrusion for extending into the sewing guide slot of the external extrusion frame is arranged on the left and right sides of the positioning protrusion, the left and right sides of the positioning protrusion are in contact with the inner wall of the sewing guide slot of the external extrusion frame, a sewing channel is vertically arranged in the positioning protrusion and is in communication with the sewing port on the base of the sewing machine, and the front and rear end faces of the positioning protrusion are arc-shaped faces adapted to the corners of the external extrusion frame. The sewing guide block is provided with a flanging block near the inner side of the sewing machine body, the outer side of the flanging block is provided with an arc-shaped turning surface for inserting into the upper clamping slot of the external extrusion frame and guiding the upper flanging to turn outward, the flanging block is provided with a sewing opening vertically arranged thereon for the upward and downward movement of the needle of the sewing machine, the machine frame is provided with a first driving structure for driving the flanging block to move and insert the arc-shaped turning surface into the upper flanging of the external extrusion frame, slide forward and backward to ensure that the arc-shaped turning surface enters the upper clamping slot of the external extrusion frame, and drive the flanging block to reset, the machine frame is provided with a thread cutting structure for automatically cutting the sewing thread when the needle of the sewing machine is lifted, the machine frame is provided with a zipper feeding structure for automatically inserting the zipper into the upper clamping slot of the external extrusion frame after the flanging is turned up, the machine frame is provided with a zipper cutting structure for automatically cutting the zipper, and the machine frame is provided with a zipper feeding structure for feeding the zipper with a set length.

2. The zipper box automatic sewing machine according to claim 1, characterized in that: The first driving structure comprises a first support, a first telescopic driving member and a second telescopic driving member, the fixed end of the first support is fixedly arranged on the machine frame or the machine shell of the sewing machine, the shell of the first telescopic driving member is fixedly arranged on the free end of the first support, the telescopic rod of the first telescopic driving member is telescopically movable in the front and rear directions, the shell of the second telescopic driving member is fixedly arranged on the shell of the first telescopic driving member, the telescopic rod of the second telescopic driving member is telescopically movable in the left and right directions, and the flanging block is fixedly arranged on the telescopic rod of the second telescopic driving member.

3. The zipper box automatic sewing machine according to claim 1, characterized in that: The thread cutting structure comprises a second support, a first electric scissors and a third telescopic driving member, the fixed end of the second support is fixedly arranged on the machine frame or the machine shell of the sewing machine, the shell of the third telescopic driving member is fixedly arranged on the free end of the second support, the first electric scissors are fixedly arranged on the telescopic rod of the third telescopic driving member, and the first electric scissors are obliquely arranged above the sewing guide block.

4. The zipper box automatic sewing machine according to claim 1, characterized in that: The zipper feeding structure comprises a feeding plate, a third support, a fourth telescopic driving element, a driving rod, the fixed end of the third support is fixedly arranged on the rack, the shell of the fourth telescopic driving element is fixedly arranged on the free end of the third support, the driving rod is fixedly arranged on the telescopic rod of the fourth telescopic driving element, the feeding plate is fixedly arranged on the driving rod obliquely above the stitching guide block, the feeding plate is provided with a feeding channel for the external zipper to pass through, and a clamping structure for damping and clamping the zipper to avoid the zipper sliding is arranged on the feeding end of the feeding plate.

5. The zipper box automatic sewing machine according to claim 4, characterized in that: The clamping structure comprises an upper clamping roller, a lower clamping roller, a support rod, a lower limiting block and an upper limiting block, the support rod is fixedly arranged on the driving rod, the support rod is provided with a fixed rod in the parallel direction of the zipper conveying direction, the lower clamping roller is rotatably arranged on the fixed rod, the fixed rod is provided with a lower limiting block on both sides of the lower clamping roller for limiting the sliding of the lower clamping roller, the fixed end of the lower limiting block is fixedly arranged on the fixed rod, the upper clamping roller is provided with a rolling shaft, the rolling shaft is fixedly sleeved with an upper limiting block on both sides of the upper clamping roller, the fixed end of the upper limiting block is fixedly arranged on the rolling shaft, the middle portions of the two upper limiting blocks are attached to the inner walls of the middle portions of the two lower limiting blocks, a damping rotating shaft is arranged between the upper limiting block and the lower limiting block for keeping the upper clamping roller and the lower clamping roller in a clamped state at all times, one end of the damping rotating shaft is fixedly arranged in the middle portion of the lower limiting block, and the other end is fixedly arranged in the middle portion of the upper limiting block, and the upper clamping roller and the lower clamping roller are left with a feeding gap for the zipper to pass through.

6. The zipper box automatic sewing machine according to claim 4 or 5, characterized in that: A guide structure is arranged between the third support and the feeding plate for guiding the feeding plate to linearly and smoothly drive the zipper to insert into the upper clamping groove of the external extrusion frame.

7. The zipper box automatic sewing machine according to claim 6, characterized in that: The guide structure comprises a mounting plate, a guide plate, a guide rail, a sliding block and a driving block, the mounting plate is fixedly arranged on the free end of the third support, the shell of the fourth telescopic driving element is fixedly arranged on the mounting plate, the sliding block is fixedly arranged on the mounting plate, the guide rail is fixedly arranged on the guide plate, the guide rail is slidably arranged on the sliding block, one end of the driving block is fixedly arranged on the telescopic rod of the fourth telescopic driving element, the other end is fixedly arranged on the guide plate, and the driving rod is fixedly arranged on the guide plate.

8. The zipper box automatic sewing machine according to claim 1, wherein: The zipper cutting structure comprises a fourth support, a fifth telescopic driving element and a second electric scissors, the fixed end of the fourth support is fixedly arranged on the rack, the shell of the fifth telescopic driving element is fixedly arranged on the free end of the fourth support, and the telescopic rod is telescopically movable in the left-right direction, and the shell of the second electric scissors is fixedly arranged on the telescopic rod of the fifth telescopic driving element.

9. The zipper box automatic sewing machine according to claim 1, characterized in that: The zipper feeding structure comprises a mounting seat, a discharging pair of rollers for actively discharging the zipper, and a plurality of guide wheels for guiding the free end of the zipper to the zipper feeding structure, the discharging pair of rollers is rotatably arranged on the mounting seat, a plurality of guide wheels is horizontally or obliquely arranged on the rack along the zipper conveying path, and the rack is provided with a second driving structure for driving the discharging pair of rollers to rotate synchronously.

10. The zipper box automatic sewing machine according to claim 9, characterized in that: The second driving structure comprises a motor, two rotating rods, two synchronous gears, the rotating rods are rotatably arranged on the mounting seat at two ends respectively, the discharging roller pairs are fixedly sleeved on the two rotating rods respectively, the two synchronous gears are fixedly sleeved on the rotating rods respectively, the two synchronous gears are in meshing transmission with each other, the shell of the motor is fixedly arranged on the mounting seat, and the rotating shaft of the motor is in synchronous rotation connection with the rotating rod.

11. The zipper box automatic sewing machine according to claim 10, wherein: The upper ends of the rotating rods are fixedly provided with sliding blocks, the mounting seat is provided with a sliding groove for the sliding blocks to slide up and down, and the sliding groove is provided with an elastic element above the sliding blocks.

12. The zipper box automatic sewing machine according to claim 9, wherein: The rack is provided with a tensioning structure for avoiding the separation of the pre-discharged zipper from the guide wheel when the pre-discharged zipper of a certain length is pulled by gravity.

13. The zipper box automatic sewing machine according to claim 12, characterized in that: The tensioning structure comprises two tensioning wheels, two tensioning sliding rails, a tensioning sliding block and at least one anti-separation tensioning wheel, the two tensioning wheels are rotatably fixed on the rack, the tensioning sliding rails are vertically fixed on the rack below the tensioning wheels, the tensioning sliding block is slidably arranged on the tensioning sliding rails, and the connecting rod is fixed between the two anti-separation tensioning wheels.

14. The zipper box automatic sewing machine according to claim 13, characterized in that: The anti-separation tensioning wheel comprises two limiting pieces, two limiting rods and a roller, the two limiting rods are arranged between the two limiting pieces and are fixed on the upper ends and lower ends of the limiting pieces respectively, the roller is sleeved on the limiting rod at the upper end, and the roller and the limiting rod at the lower end form an anti-separation guide opening for the external zipper to pass through and limit the separation of the zipper.

15. The zipper box automatic sewing machine according to claim 1, characterized in that: The rack is provided with a feeding disc for placing the external zipper roll, and the feeding disc is vertically provided with a sleeve rod for sleeving the external zipper roll cylinder.

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