A threading and pressing device for zipper production

Abstract

The application discloses a threading head and pressing stop device for zipper production and relates to the technical field of zipper production, and aims to solve the problem of deviation or bifurcation of the zipper tape during the conveying process, which affects the threading efficiency. The technical scheme is as follows: a rack, a conveying mechanism, a puller threading mechanism, a pulling mechanism, an upper stop mechanism and a cutting mechanism arranged on the rack; the conveying mechanism is used for synchronously conveying two zipper tapes forward; the puller threading mechanism is used for sleeving the puller on the front end of the zipper tape and is used for clamping and pulling the zipper tape with the puller forward along the conveying direction; the pulling mechanism is arranged downstream of the puller threading mechanism. The cooperation structure of the split chain block and the buffer block in the puller threading mechanism of the application ensures that the zipper tape can enter the puller in a correct posture, further improves the success rate of threading, and the arrangement of the detection mechanism and the flow distribution mechanism further ensures the quality consistency of the products.

Description

Technical Field

[0001] This invention relates to the field of zipper manufacturing technology, and more specifically, to a device for threading and pressing zippers in zipper manufacturing. Background Technology

[0002] Zippers are widely used connectors in everyday items such as clothing, bags, and shoes. They typically consist of two zipper tapes, a zipper pull, and components such as zipper teeth, top stop, and bottom stop on the zipper tapes. The production and processing of zippers requires multiple steps, including cutting, threading, and top stop.

[0003] Currently, zipper production equipment mainly falls into two categories. One type separates the cutting, threading, and stop-start processes into individual machines, resulting in fragmented equipment with low integration, cumbersome processing, and low efficiency; a complete automated production line has not yet been formed. The other type is the integrated equipment that has emerged in recent years, such as the zipper tape cutting, threading, and stop-start system disclosed in Chinese patent CN105495878A. This system achieves integrated implementation of the zipper tape cutting, threading, and stop-start processes through the coordination of a feeding device, cutting device, transfer gripper device, threading pressing device, stop-start pressing device, and unloading device.

[0004] However, during the zipper pull insertion process, both sides of the zipper tape need to be accurately inserted into the two channels of the zipper pull. Because the zipper tape may shift or fork during transport, this can lead to insertion failure or jamming, affecting insertion efficiency and success rate. Furthermore, some existing pulling mechanisms can only move the zipper tape in a straight line. When the resistance of the zipper teeth is high, jamming can easily occur, even damaging the zipper teeth or the zipper pull, affecting product yield. In addition, after the zipper pull insertion is completed, existing equipment lacks automatic detection and sorting functions for the installation quality of the zipper pulls. It cannot automatically identify whether the zipper pulls are installed correctly, and defective products will be mixed into the finished products and flow into subsequent stages, affecting the stability and consistency of product quality. Moreover, manual sorting is required afterward, increasing labor costs.

[0005] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a device for threading and pressing the zipper in zipper production, which has the advantage of improving the success rate of threading.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a device for threading and pressing shut the zipper in production, comprising: The frame, and the conveying mechanism, pull head insertion mechanism, pulling mechanism, top stop mechanism, cutting mechanism and diversion mechanism installed on the frame; The conveying mechanism is used to convey the two zipper tapes forward synchronously. The zipper pull insertion mechanism is used to attach the zipper pull to the front end of the zipper tape; The pulling mechanism is located downstream of the zipper head threading mechanism and is used to clamp the zipper strip with the zipper head threaded on it and pull it forward along the conveying direction so that the two zipper strips pull each other together during the movement of the zipper head. The upper stop mechanism is located upstream of the zipper pull mechanism and is used to set an upper stop on the chain teeth at the top of the zipper pull. The cutting mechanism is located downstream of the upper stop mechanism and is used to cut the continuously conveyed zipper tape to a preset length to form a single zipper. The pulling mechanism is also used to continue pulling out a single zipper along the conveying direction after it has been cut; The detection mechanism is located at the discharge end of the pulling mechanism and is used to detect whether the pull head on a single zipper is installed in place after it is pulled out, and to output a detection signal. The diversion mechanism is located below the detection mechanism and includes a vertically extending qualified channel and an unqualified channel composed of a cylinder and an inclined plate. The cylinder is installed at an angle on the outer wall of the frame, and the inclined plate is located at the piston end of the cylinder. The cylinder receives a detection signal. When the zipper head is not installed in place, it drives the inclined plate to extend above the qualified channel and guides the unqualified product to the unqualified channel. When the zipper head is installed in place, the inclined plate remains retracted and the single zipper falls along the qualified channel.

[0008] The present invention is further configured such that: the conveying mechanism includes two sets of parallel conveying wheel sets, the two sets of conveying wheel sets are respectively used to clamp the edges of the fabric strips of the two zipper belts, and the two sets of conveying wheel sets are synchronously driven by the same drive motor.

[0009] The present invention is further configured such that: the pull head insertion mechanism includes a feeding vibratory feeder, a transport channel and a limiting component, the outlet side of the feeding vibratory feeder is connected to the transport channel, and the limiting component includes a mounting seat that communicates with the transport channel, the mounting seat being used to clamp and limit the position of the pull head.

[0010] The present invention is further configured such that the detection mechanism is any one of a photoelectric sensor, a proximity switch, or a visual inspection camera.

[0011] The present invention is further configured such that: the pulling mechanism includes a clamping member and a translational driving member, the clamping member is used to clamp the zipper tape, and the translational driving member is connected to the clamping member for driving the clamping member to reciprocate along the conveying direction.

[0012] The present invention is further configured such that: the upper stop mechanism includes an upper stamping die, a lower stamping die, and an upper stop feeding assembly; the upper stamping die can move up and down reciprocally relative to the lower stamping die; and the upper stop feeding assembly is used to feed the upper stop blank between the upper stamping die and the lower stamping die.

[0013] The present invention is further configured such that: the cutting mechanism includes a fixed cutter and a movable cutter, the fixed cutter is fixed on the frame, the movable cutter is disposed opposite to the fixed cutter, and the movable cutter moves closer to or away from the fixed cutter by a driving member.

[0014] The present invention is further configured such that: a finished product collection box is provided below the qualified channel of the diversion mechanism, and a waste collection box is provided below the end of the inclined plate.

[0015] In summary, the present invention has the following beneficial effects: The combination of the chain-splitting block and the buffer block in the zipper pull mechanism ensures that the zipper tape enters the zipper pull in the correct posture, further improving the success rate of zipper pull. The setting of the detection mechanism and the diversion mechanism further ensures the consistency of the quality of the products leaving the factory and avoids the mixing of unqualified products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 Cross-sectional view of the present invention Figure 1 ; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 4 Cross-sectional view of the present invention Figure 2 .

[0017] In the diagram: 1. Frame; 2. Clamping component; 3. Translation drive component; 4. Swing drive component; 5. Conveyor wheel assembly; 6. Feeding vibratory feeder; 7. Transport channel; 8. Mounting base; 9. Chain splitter block; 10. Buffer block; 11. Detection mechanism; 12. Qualified channel; 13. Cylinder; 14. Inclined plate; 15. Upper stamping die; 16. Lower stamping die; 17. Upper stop feeding assembly; 18. Fixed cutter; 19. Movable cutter; 20. Finished product collection box; 21. Waste collection box. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0019] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] A device for threading and pressing the zipper in zipper production, such as Figures 1-4 As shown, the equipment includes a frame 1, and a conveying mechanism, a pull head insertion mechanism, a pulling mechanism, an upper stop mechanism, and a cutting mechanism mounted on the frame 1. The frame 1 serves as the installation foundation for the entire equipment and adopts a rigid metal frame structure, which is assembled by welding profiles or bolts. It has sufficient structural strength and rigidity to provide stable support and precise installation positioning. The upper surface of the frame 1 is a worktable, and the various mechanisms are arranged and installed on the worktable in sequence according to the process order to form a processing production line from the feeding end to the discharging end. The conveying mechanism is located at the feed end of frame 1, used to synchronously convey two zipper belts forward to each processing station. The zipper head insertion mechanism is located downstream of the conveying mechanism, used to attach the zipper head to the front end of the zipper belt. The pulling mechanism is located downstream of the zipper head insertion mechanism, used to clamp the zipper belt with the zipper head attached and pull it forward along the conveying direction, so that the two zipper belts pull each other together during the movement of the zipper head. The upper stop mechanism is located upstream of the zipper head insertion mechanism, used to set an upper stop on the zipper teeth at the top of the zipper head. The cutting mechanism is located downstream of the upper stop mechanism, used to cut the continuously conveyed zipper belt to a preset length to form a single zipper. The entire equipment integrates multiple processes such as zipper belt conveying, zipper head insertion, pulling together, upper stop setting, and cutting into one unit, realizing continuous and automated operation of zipper production, effectively improving production efficiency, reducing labor costs, and reducing the equipment's footprint due to the reasonable and compact layout of the various mechanisms.

[0022] The conveying mechanism is used to synchronously transport two zipper belts forward. Specifically, the conveying mechanism includes two sets of parallel conveyor rollers 5. Each set of rollers 5 is used to clamp the edges of the two zipper belts, and both sets are synchronously driven by the same drive motor. The two sets of rollers 5 are arranged parallel to each other on the frame 1, with the spacing between them matching the spacing of the two zipper belts to ensure that the two zipper belts maintain the correct relative position during transport. Each set of rollers 5 includes a driving roller and a driven roller. The driving roller is driven by a drive motor, and the driven roller is rotatably mounted on the frame 1 and positioned opposite the driving roller, forming a clamping gap between them. The edges of the zipper belts are clamped within this clamping gap. The surfaces of the driving and driven rollers can be knurled or covered with a rubber layer to increase friction with the edges of the belts and prevent slippage during transport. The two sets of conveyor wheel sets 5 can be driven synchronously by the same drive motor through transmission shaft, synchronous belt or gear set, etc., which ensures that the conveying speed of the two zipper belts is completely consistent, avoiding the problem of misalignment or wrinkling of the zipper belt due to speed difference, and providing a good positional basis for the accurate insertion of the zipper head.

[0023] In some embodiments, the two zipper tapes can be joined together in advance using a zipper joining machine, so that the zipper tapes on both sides can be transported synchronously in a joined state, thus preventing misalignment from the source.

[0024] The zipper pull insertion mechanism is used to attach the zipper pull to the front end of the zipper belt. The zipper pull insertion mechanism is located downstream of the conveying mechanism. When the two zipper belts are conveyed by the conveying mechanism to the zipper pull insertion mechanism, the zipper pull insertion mechanism attaches the pre-prepared zipper pull to the front end of the two zipper belts. The zipper pull insertion mechanism includes a feeding vibratory plate 6, a transport channel 7, and a limiting component. The feeding vibratory plate 6 is located on one side of the frame 1 and stores several zipper pulls inside. The vibration of the feeding vibratory plate 6 arranges the zipper pulls in a uniform orientation and outputs them one by one into the transport channel 7. The inner wall of the hopper of the feeding vibratory plate 6 is provided with a spiral feeding track. High-frequency vibration is generated by an electromagnet, which causes the zipper pulls to rise gradually along the feeding track and be arranged neatly, and finally output sequentially from the outlet. One end of the transport channel 7 is connected to the outlet of the feeding vibratory plate 6, and the other end is connected to the limiting component. The zipper pulls are arranged sequentially along the transport channel 7 and conveyed forward.

[0025] The cross-sectional shape of the transport channel 7 is adapted to the shape of the zipper pull, ensuring that the zipper pull will not flip or deviate within the channel. Air vents or feeding rollers can be provided at the bottom of the transport channel 7 to assist the zipper pull in moving smoothly along the channel and avoid blockage. The limiting component includes a mounting base 8 that communicates with the transport channel 7. The mounting base 8 is fixed to the frame 1 and is used to clamp and limit the position of the zipper pull. The mounting base 8 has a limiting cavity adapted to the shape of the zipper pull. When the zipper pull is fed into the mounting base 8 from the transport channel 7, the limiting cavity positions and holds the zipper pull, ensuring it is in an accurate threading position, awaiting the front ends of the two zipper belts to be fed in. The inlet of the limiting cavity connects to the transport channel 7, and the outlet faces the direction of travel of the zipper belts. The zipper pull remains open towards the zipper belts within the limiting cavity.

[0026] To further improve the success rate of zipper pull insertion, a chain divider block 9 is provided on the front side of the mounting base 8. The chain divider block 9 is triangular in shape with its tip facing the feeding side. The chain divider block 9 is fixedly installed on the feeding end of the mounting base 8. Its cross-section is triangular and has two symmetrically arranged guide slopes. When the two zipper tapes move forward to the chain divider block 9, the two zipper tapes slide along the two slopes of the chain divider block 9 respectively, so that the two zipper tapes are fully separated before entering the zipper pull, avoiding the failure of insertion caused by the zipper tapes sticking together or coming together and failing to be accurately inserted into the two channels of the zipper pull. A buffer block 10 is fixedly connected to one end of the chain splitter 9 near the mounting base 8. The width of the buffer block 10 is the same as the opening width of the zipper head. The surface of the buffer block 10 is smooth and has an anti-static coating. When the two zipper straps are split by the chain splitter 9, they enter the buffer block 10 area. The buffer block 10 guides and limits the zipper straps, ensuring that the two zipper straps enter the two channels of the zipper head at the correct spacing and angle, further ensuring the smoothness and success rate of threading the zipper head.

[0027] The pulling mechanism is located downstream of the zipper head insertion mechanism. It is used to clamp the zipper strip with the zipper head inserted and pull it forward along the conveying direction. After the zipper head is fitted onto the front end of the two zipper strips, the conveying mechanism continues to convey it until it reaches the pulling mechanism. The pulled mechanism pulls the zipper strips together, causing the zipper head to quickly shift relative to each other, so that the two zipper strips can mesh with each other under the guidance of the zipper head. The pulling mechanism includes a clamping component 2, a translational drive component 3, and a swing drive component 4. The clamping component 2 is located downstream of the zipper head insertion mechanism and is used to clamp the zipper strip with the zipper head inserted. The clamping component 2 adopts a pneumatic gripper or an electric gripper, which has two relatively openable grippers. The width of the grippers can cover the width of the two zipper strips. The gripping surface of the grippers can be provided with anti-slip texture or covered with a flexible pad to improve the gripping stability and avoid damage to the zipper strips. After clamping member 2 clamps the zipper belt, translation drive member 3 drives clamping member 2 to move forward along the conveying direction. Clamping member 2 drives the zipper belt to move forward. During the forward movement of the zipper belt, the zipper head slides backward relative to the zipper belt, so that the two zipper belts gradually approach each other and mesh in the two channels of the zipper head.

[0028] In some embodiments, the translation drive 3 can be a common linear drive element such as a cylinder 13, a hydraulic cylinder, a lead screw and nut mechanism, or a linear module. Its output end is fixedly connected to the clamping member 2 and is used to provide the driving force for the clamping member 2 to reciprocate and translate along the conveying direction. The swing drive 4 is connected to the clamping member 2 and is used to drive the clamping member 2 to reciprocate and swing in the horizontal plane during the translation process. The swing drive 4 can be a structure such as a swing cylinder 13, a rotary motor with a cam mechanism, or a crank-connecting rod mechanism. Its output end is connected to the clamping member 2 and can drive the clamping member 2 to reciprocate and swing in the horizontal plane around a vertical axis with a small amplitude. While the translational drive 3 drives the clamping component 2 to move forward, the swing drive 4 drives the clamping component 2 to swing back and forth in the horizontal plane. This causes the zipper tape to vibrate slightly from side to side during the forward pulling and closing process. This vibration-assisted action simulates the manual pulling and shaking operation of a zipper, effectively reducing the frictional resistance when the two zipper tapes mesh in the zipper head. This allows the zipper teeth to enter the guide channel of the zipper head more smoothly, avoiding problems such as jamming, skipped teeth, or damage to the zipper head caused by excessive resistance. At the same time, the vibration-assisted action also makes the zipper teeth more neatly arranged and more tightly meshed in the zipper head, improving the zipper's opening and closing quality. The translational drive 3 and the swing drive 4 are coordinated and controlled by the same controller to achieve a composite motion of translation and swing. The frequency and amplitude of their movements can be adjusted according to the specifications and materials of the zipper to adapt to the production needs of different products. For example, for thicker or harder zipper teeth, the swing amplitude and frequency can be appropriately increased; for thinner or softer zipper teeth, the swing amplitude can be reduced to avoid excessive shaking that could cause the zipper tape to twist.

[0029] The upper stop mechanism is located upstream of the zipper pull insertion mechanism. It is used to set an upper stop on the zipper teeth at the top of the zipper pull. The upper stop is an important component of the zipper. It is set at the top of the zipper, that is, above the final stopping position of the zipper pull, to prevent the zipper pull from coming off the top of the zipper tape. The upper stop mechanism is set upstream of the zipper pull insertion mechanism. That is, before the zipper tape reaches the zipper pull insertion mechanism, the upper stop is set at its predetermined position, that is, at the top of the position where the zipper pull will be after it is inserted. Then the insertion operation is carried out. This arrangement of setting the upper stop first and then inserting the zipper pull ensures that when the upper stop is set, the zipper pull has not yet been inserted into the zipper tape. There is no interference from the zipper pull around the upper stop mechanism, and there is sufficient space for the stamping operation, which helps to improve the setting accuracy and firmness of the upper stop. The upper stop mechanism includes an upper stamping die 15, a lower stamping die 16, and an upper stop feeding assembly 17. The upper stamping die 15 can move up and down reciprocally relative to the lower stamping die 16. The lower stamping die 16 is fixedly mounted on the frame 1. The upper stamping die 15 is connected to the output end of a lifting drive component. The lifting drive component can be a stamping cylinder 13 or a stamping oil cylinder. Under the drive of the lifting drive component, the upper stamping die 15 can move towards the lower stamping die 16 to stamp, or move upward away from the lower stamping die 16 to complete the reset. The upper stop feeding assembly 17 is used to feed the upper stop blank between the upper stamping die 15 and the lower stamping die 16. The upper stop feeding assembly 17 includes a vibratory feeder and a feeding channel. The vibratory feeder arranges the upper stop blank in a uniform orientation and then feeds it to the stamping station through the feeding channel, that is, between the upper stamping die 15 and the lower stamping die 16. When the zipper belt travels to the stamping station of the upper stop mechanism, the upper stop blank is fed into the space between the upper stamping die 15 and the lower stamping die 16 and is located at the predetermined position of the zipper belt teeth. Subsequently, the upper stamping die 15 moves downward rapidly under the drive of the lifting drive component and closes with the lower stamping die 16 to stamp and fix the upper stop blank on the teeth.

[0030] The upper stop mechanism is pre-set before threading the zipper. This avoids interference from the pull head on the stamping operation when setting the upper stop after threading. It also keeps the pull head confined between the upper and lower stops during the subsequent closing process, ensuring that the pull head will not come off the top of the zipper belt, thus improving the reliability of the zipper. The upper stop mechanism has a simple structure and high stamping precision, and can realize the automated and continuous setting of the upper stop. The supply of the upper stop blank and the stamping action are both automatically controlled by the control system without manual intervention.

[0031] The cutting mechanism is located downstream of the upper stop mechanism and is used to cut the continuously conveyed zipper tape to a preset length to form a single zipper. The zipper tape is supplied by the upstream feeding device in a continuous long strip form. In actual production, the zipper toother installs the zipper teeth on the tape according to a preset length, forming an intermittent zipper tape. The cutting mechanism cuts the zipper tape to the preset length to form an independent single zipper. The cutting mechanism is located downstream of the upper stop mechanism and between the upper stop mechanism and the zipper head insertion mechanism. After the zipper head is inserted, there is still a certain length between the zipper head and the upper stop mechanism. The cutting mechanism needs to cut the zipper tape according to the length of the zipper teeth. The cutting mechanism includes a fixed cutter 18 and a movable cutter 19. The fixed cutter 18 is fixed on the frame 1 and has a sharp cutting edge. The movable cutter 19 is arranged opposite to the fixed cutter 18. The movable cutter 19 moves closer to or away from the fixed cutter 18 by a driving member. The driving member can be a stamping cylinder 13 or a stamping oil cylinder, and its output end is connected to the movable cutter 19.

[0032] When the zipper tape reaches the preset length for a single zipper, the drive unit drives the movable cutter 19 to move rapidly towards the fixed cutter 18. The cutting edges of the movable cutter 19 and the fixed cutter 18 intersect, cutting the zipper tape between them using the shearing principle. Because the zipper tape is taut during its journey, the cut is smooth and burr-free, facilitating subsequent threading and zipping operations. The cutting action of the cutting mechanism coordinates with the conveying action of the conveying mechanism. By controlling the number of rotations of the drive motor and the timing of the cutting drive unit, precise control of the zipper tape length can be achieved, ensuring that each cut zipper tape is of consistent length. After cutting, the movable cutter 19 resets under the drive unit's influence, awaiting the next cutting action.

[0033] The pulling mechanism is also used to continue pulling out a single zipper along the conveying direction after cutting. After completing the zipper belt pulling operation, the clamping member 2 of the pulling mechanism continues to hold the zipper belt. When the cutting mechanism cuts the zipper belt into a single zipper, the translational drive member 3 continues to drive the clamping member 2 forward along the conveying direction, pulling the cut single zipper forward until it completely separates from the threading and cutting stations and enters the discharge area, making room for the next threading and cutting operation. The pulling mechanism performs both pulling and discharging functions, eliminating the need for a separate discharge device, simplifying the equipment structure, reducing manufacturing costs, and making the overall machine's operation sequence more compact and coordinated, thus improving production efficiency. After a single zipper is completely pulled out to the discharge end, the clamping member 2 releases the zipper belt, and the translational drive member 3 drives the clamping member 2 back to its initial position, ready to clamp the next section of zipper belt for a new round of pulling and discharging operations.

[0034] In some embodiments, a detection mechanism 11 is also provided on the frame 1. The detection mechanism 11 is located at the discharge end of the pulling mechanism and is used to detect whether the zipper head on the single zipper is installed in place after being pulled out, and output a detection signal. After the pulling mechanism pulls out the single zipper completely, the detection mechanism 11 detects the installation status of the zipper head on the zipper tape. Since the zipper head may not be completely fitted onto the zipper tape due to abnormal zipper head feeding, zipper tape positioning deviation, excessive pulling resistance, etc., or the zipper head may be misaligned, flipped, or otherwise not installed in place, these defective products will affect the performance of the zipper if they are mixed into the finished product. Therefore, it is necessary to detect the status of the zipper pull. The detection mechanism 11 can use any one of photoelectric sensors, proximity switches, or vision inspection cameras. Photoelectric sensors determine whether the zipper pull is in a predetermined position by emitting a light beam and receiving reflected light. When the zipper pull is installed correctly, the light beam is blocked or reflected by the zipper pull, and the sensor outputs a corresponding signal. When the zipper pull is not installed correctly, the light beam is not blocked or the reflected signal is abnormal, and the sensor outputs different signals. Photoelectric sensors have the advantages of fast response speed and low cost. Proximity switches determine the position of the zipper pull by sensing the change in eddy currents generated when the metal zipper pull approaches. They have the advantages of strong anti-interference ability and are not affected by dust and light, making them suitable for use in relatively complex industrial environments. Vision inspection cameras capture images of the zipper pull area and use image processing algorithms to identify the position and posture of the zipper pull. This allows for more accurate determination of whether the zipper pull is installed correctly and can simultaneously detect multiple defects such as whether the zipper pull is tilted, damaged, or incorrect in model. They offer the highest detection accuracy but are also relatively expensive. The operator can select the appropriate type of testing mechanism 11 according to the actual testing accuracy requirements and cost budget. The testing mechanism 11 is connected to the diversion mechanism by signal, and its testing results serve as the control basis for the diversion mechanism, thus realizing the automatic identification of non-conforming products.

[0035] Below the testing mechanism 11 is a diversion mechanism, which includes a vertically extending qualified channel 12 and an unqualified channel 12 composed of a cylinder 13 and an inclined plate 14. The qualified channel 12 extends vertically, and its entrance is directly opposite the discharge end of the pulling mechanism. When a single zipper is pulled out and released by the pulling mechanism, it falls naturally into the qualified channel 12 under the action of gravity. The inner wall of the qualified channel 12 is smooth, and its cross-sectional dimension is larger than the width of a single zipper to ensure that the zipper can pass through smoothly. The non-conforming channel 12 includes a cylinder 13 and an inclined plate 14. The cylinder 13 is installed at an angle on the outer wall of the frame 1, and the inclined plate 14 is located at the piston end of the cylinder 13. The piston rod of the cylinder 13 extends upwards towards the conforming channel 12, and the inclined plate 14 is fixedly connected to the end of the piston rod. The cylinder 13 receives a detection signal from the detection mechanism 11. When the detection mechanism 11 detects that the zipper head is not installed in place, the cylinder 13 receives the detection signal and drives the piston rod to extend rapidly, causing the inclined plate 14 to extend above the conforming channel 12. At this time, the non-conforming single zipper released by the pulling mechanism first contacts the upper surface of the inclined plate 14 during its descent and slides down the inclined surface of the inclined plate 14 into the non-conforming channel 12, thereby being guided to the waste collection area. When the detection mechanism 11 detects that the zipper head is installed in place, the cylinder 13 remains in its initial state, and the inclined plate 14 remains in its retracted state. The inclined plate 14 does not obstruct the entrance of the conforming channel 12, and the single zipper falls freely along the conforming channel 12 to the finished product collection area. The working principle of the diversion mechanism is simple and reliable. It can automatically separate qualified and unqualified products through the cooperation of a cylinder 13 and an inclined plate 14. It does not require a complicated robotic arm or conveyor belt structure, is low in cost and fast in action. At the same time, the cylinder 13 is installed at an angle on the outer wall of the frame 1, so that the unqualified products caught by the inclined plate 14 can naturally enter the unqualified channel 12 with the slope of the inclined plate 14.

[0036] Below the qualified channel 12 of the diversion mechanism is a finished product collection box 20. The finished product collection box 20 is used to collect qualified single zippers for subsequent packaging or further processing. The finished product collection box 20 has an open top, with its opening facing the exit of the qualified channel 12. Qualified zippers fall directly into the finished product collection box 20 after descending from the qualified channel 12. Below the end of the inclined plate 14 is a waste collection box 21. The waste collection box 21 is used to collect waste zippers with improperly installed zipper heads for unified processing or rework. The waste collection box 21 also has an open top, with its opening facing the lower end of the inclined plate 14. Unqualified zippers slide down the inclined plate 14 and fall into the waste collection box 21. Both the finished product collection box 20 and the waste collection box 21 are detachable and can be fixed to the frame 1 by snap-fit ​​or plug-in connection. When full, they can be easily removed and replaced, improving the ease of operation of the equipment.

[0037] Work process: During operation, two zipper belts are first placed between the two sets of conveyor wheels 5 of the conveying mechanism. Driven by a drive motor, the two sets of conveyor wheels 5 rotate synchronously, conveying the two zipper belts forward at the same speed. The zipper belts pass sequentially through a cutting mechanism, a top-stop mechanism, and a zipper head insertion mechanism. When the zipper belt reaches the cutting mechanism, the driving component of the cutting mechanism drives the movable cutter 19 to move towards the fixed cutter 18, cutting the zipper belt to a preset length to form a single zipper. At this time, the clamping component 2 of the pulling mechanism has moved to the downstream side of the cutting mechanism and clamps the end of the zipper belt. Subsequently, the zipper belt continues forward to the top-stop mechanism, where the top-stop feeding assembly 17 conveys the top-stop blank to between the upper stamping die 15 and the lower stamping die 16. The upper stamping die 15 moves downward to stamp and fix the top-stop blank at the predetermined position of the zipper belt's top teeth. Then, the zipper belt continues forward to the zipper head insertion mechanism. The zipper head is fed into the mounting base 8 by the feeding vibratory plate 6 via the transport channel 7. The mounting base 8 positions and holds the zipper head. Before the zipper belt enters the zipper head, the chain separating block 9 first separates the two zipper belts, and the buffer block 10 guides and buffers the zipper belts to ensure that the two zipper belts enter the two channels of the zipper head with the correct posture and spacing, completing the zipper head insertion. The zipper belt with the zipper head inserted continues forward. The clamping member 2 of the pulling mechanism clamps the zipper belt, and the translation drive member 3 drives the clamping member 2 to move forward along the conveying direction. At the same time, the swing drive member 4 drives the clamping member 2 to swing back and forth in the horizontal plane, so that the zipper belt generates a shaking assist during the forward pulling process. Under the guidance of the zipper head, the two zipper belts smoothly mesh with each other, completing the pulling operation. After the pulling is completed, the cutting mechanism acts again to cut and separate the pulled zipper belt from the continuously conveyed zipper belt, forming an independent single zipper. The clamping component 2 of the pulling mechanism continues to hold the zipper, while the translation drive component 3 continues to drive the clamping component 2 forward, fully pulling the single zipper out to the discharge end. Finally, the clamping component 2 releases the single zipper, and the detection mechanism 11 detects the installation status of the zipper pull on the single zipper. Based on the detection results, it controls the diversion mechanism to guide qualified and unqualified products to the finished product collection box 20 and the waste collection box 21, respectively.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A device for threading and pressing zippers during zipper production, characterized in that, include: The frame, and the conveying mechanism, the pull head insertion mechanism, the pulling mechanism, the upper stop mechanism and the cutting mechanism installed on the frame; The conveying mechanism is used to convey the two zipper tapes forward synchronously. The zipper pull insertion mechanism is used to attach the zipper pull to the front end of the zipper tape; The pulling mechanism is located downstream of the zipper head insertion mechanism and is used to clamp the zipper strip with the zipper head inserted and pull it forward along the conveying direction. The pulling mechanism includes a clamping component, a translational drive component, and a swinging drive component. The translational drive component drives the clamping component to reciprocate along the conveying direction. The swinging drive component drives the clamping component to swing back and forth in the horizontal plane during the translation of the clamping component, so that the zipper strip generates a shaking assist during the pulling and closing process. The upper stop mechanism is located upstream of the zipper pull mechanism and is used to set an upper stop on the chain teeth at the top of the zipper pull. The cutting mechanism is located downstream of the upper stop mechanism and is used to cut the continuously conveyed zipper tape to a preset length to form a single zipper. The pulling mechanism is also used to continue pulling out a single zipper along the conveying direction after it has been cut.

2. The zipper threading and pressing device for zipper production according to claim 1, characterized in that: The conveying mechanism includes two sets of parallel conveying wheels, which are used to clamp the edges of the two zipper tapes respectively, and are driven synchronously by the same drive motor.

3. The zipper threading and pressing device for zipper production according to claim 1, characterized in that: The pull head insertion mechanism includes a feeding vibratory feeder, a transport channel, and a limiting component. The outlet side of the feeding vibratory feeder is connected to the transport channel. The limiting component includes a mounting base that communicates with the transport channel. The mounting base is used to clamp and limit the position of the pull head. A chain-splitting block is provided on the front side of the mounting base. The chain-splitting block is triangular in shape, with its tip facing the feeding side. A buffer block is fixedly connected to one end of the chain-splitting block near the mounting base. The width of the buffer block is the same as the opening width of the pull head.

4. The zipper threading and pressing device for zipper production according to claim 1, characterized in that: The frame is equipped with a detection mechanism located at the discharge end of the pulling mechanism. The detection mechanism is used to detect whether the pull head on a single zipper is installed in place after it is pulled out, and outputs a detection signal.

5. The zipper threading and pressing device for zipper production according to claim 4, characterized in that: The detection mechanism can be any one of a photoelectric sensor, a proximity switch, or a visual inspection camera.

6. The zipper threading and pressing device for zipper production according to claim 4, characterized in that: Below the detection mechanism is a diversion mechanism, which includes a vertically extending qualified channel and an unqualified channel composed of a cylinder and an inclined plate. The cylinder is installed at an angle on the outer wall of the frame, and the inclined plate is located at the piston end of the cylinder. The cylinder receives the detection signal and drives the inclined plate to extend above the qualified channel when the pull head is not installed in place, guiding the unqualified products to the unqualified channel; When the zipper head is installed in place, the ramp remains retracted, and the single zipper falls along the designated channel.

7. The zipper threading and pressing device for zipper production according to claim 1, characterized in that: The upper stop mechanism includes an upper stamping die, a lower stamping die, and an upper stop feeding assembly. The upper stamping die can move up and down reciprocally relative to the lower stamping die. The upper stop feeding assembly is used to feed the upper stop blank between the upper stamping die and the lower stamping die.

8. The zipper threading and pressing device for zipper production according to claim 1, characterized in that: The cutting mechanism includes a fixed cutter and a movable cutter. The fixed cutter is fixed on the frame, and the movable cutter is arranged opposite to the fixed cutter. The movable cutter moves closer to or away from the fixed cutter by a driving component.

9. The zipper threading and pressing device for zipper production according to claim 1, characterized in that: A finished product collection box is provided below the qualified channel of the diversion mechanism, and a waste collection box is provided below the end of the inclined plate.

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