A buckle type PET tape bundling machine head for packaging

Abstract

The application relates to the technical field of packaging machinery and discloses a buckle type PET tape bundling machine head for packaging, which comprises a tape feeding module unit, a frame, a tightening module unit, a buckle making module unit, a cover plate assembly, an opening door driving assembly, a vibration assembly, a guide assembly and a detection assembly; the buckle making module unit, the opening door driving assembly and the vibration assembly are installed on one side of the cover plate assembly; the tightening module unit is installed on one side of the tape feeding module unit; two pairs of guide rails are fixedly installed on the same side of the frame; the tape feeding module unit and the tightening module unit are rollingly assembled on one pair of the guide rails through first rollers on the sides far away from each other; and the cover plate assembly and the buckle making module unit are rollingly assembled on the other pair of the guide rails through second rollers on the sides far away from each other. The driving mode of the traditional air cylinder is replaced by the motor and mechanical transmission mode, the fast-paced bundling buckle making demand is met, the bundling efficiency is improved, and the length of the conveying tape, the conveying position and the displacement position are more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging machinery, in particular to a buckle type PET tape bundling machine head for packaging. BACKGROUND

[0002] The current buckle type bundling machine head uses steel tape for tightening, which has high cost. At the same time, the speed of connecting the steel tape is slow when using the steel tape bundling machine head, and no matter whether the steel nail or the buckle mechanism is used to butt joint the steel tape, the structure is complex, so it is difficult to maintain and repair. Using the PET tape bundling machine head for bundling not only has high speed but also does not need to use the steel nail or the buckle mechanism to fix the butt joint of the steel tape, and the structure is more simplified.

[0003] However, the existing PET tape bundling machine head uses a cylinder for power driving for each part, which needs a large cylinder volume, occupies a large space, and needs a large amount of compressed air. For continuous and fast buckling requirements, the air pressure fluctuation of the compressed air will affect the action accuracy of the cylinder, thereby affecting the butt joint quality of the PET tape. In order to meet the butt joint quality, the buckling speed needs to be appropriately reduced, which will reduce the bundling efficiency.

[0004] Therefore, a buckle type PET tape bundling machine head for packaging is proposed. SUMMARY

[0005] The present application aims to provide a buckle type PET tape bundling machine head for packaging, which uses a motor as a driving method, has sufficient power and smaller volume, detects and feeds back each action, and ensures the action accuracy to solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The utility model provides a buckle type PET tape bundling machine head for packaging, including supply belt module unit, frame, tightening module unit, buckle module unit, cover plate assembly, door opening drive assembly, vibration assembly, guide assembly and detection assembly, one side of cover plate assembly is equipped with buckle module unit, door opening drive assembly and vibration assembly, one side of supply belt module unit is equipped with tightening module unit, the same side of frame is fixedly installed with two pairs of guide rails, and one side of supply belt module unit and tightening module unit is rotatably installed with first roller through support frame, and first roller is rotatably assembled on one of the guide rails, and one side of cover plate assembly and buckle module unit is rotatably installed with second roller through support frame, and second roller is rotatably assembled on the other pair of guide rails, and one side of buckle module unit is fixedly installed with one end of tension sensor, and the other end of tension sensor is connected with tightening module unit, and one side of buckle module unit is provided with detection assembly, and buckle module unit, detection assembly and tightening module unit are all equipped with guide assembly, and the frame is fixedly installed with dead stop for positioning tightening module unit.

[0008] Further, the supply belt module unit includes a supply belt housing, a first speed reducer motor, a supply belt wheel, and a tensioning wheel; a pair of first guide blocks is fixedly installed on the inner side of the supply belt housing; a moving plate is slidably installed between the first guide blocks and the side wall of the supply belt housing; the tensioning wheel is rotatably assembled on the moving plate through a rotating shaft; two guide rings are fixedly installed in the supply belt housing; the moving plate is fixedly installed with one end of a connecting rod on both sides thereof; the other end of the connecting rod extends to the guide rings; a light rod screw is inserted into the guide rings; the light rod screw is connected with the connecting rod; a first elastic member is sleeved with the light rod screw; the first elastic member abuts between the guide rings and the connecting rod; one end of a wrench is rotatably assembled with the supply belt housing through a support column; the other end of the wrench extends out of the supply belt housing; the wrench is rotatably assembled with the rotating shaft on one side thereof; the supply belt wheel is rotatably assembled on the inner side of the supply belt housing; a conveying channel is fixedly installed in the supply belt housing; the conveying channel is located between the supply belt wheel and the tensioning wheel; conveying openings matching the conveying channel are formed on both sides of the supply belt housing; the first speed reducer motor is fixedly installed on the outer side of the supply belt housing; the output shaft of the first speed reducer motor penetrates the supply belt housing and is fixedly assembled with the supply belt wheel; a blocking ring is fixedly installed on the end of the tensioning wheel close to the wrench; an encoder is fixedly installed in the supply belt housing; a roller is fixedly installed on the rotating shaft of the encoder; one side of the roller extends into the conveying channel.

[0009] Further, the tightening module unit comprises a tightening cover, a guide plate, a second speed reducer motor, a pulling block and a support plate; the tightening cover and the supply belt cover are fixedly assembled through a fixing rod; two ends of the tightening cover are open, the inner side of the tightening cover is fixedly installed with the guide plate and the directional stopper, the guide plate is composed of a straight plate and an arc plate, the inner side of the tightening cover is rotatably installed with a first guide wheel, the first guide wheel is symmetrically arranged at the end of the straight plate away from the arc plate, the inner side of the tightening cover is uniformly provided with a plurality of second guide wheels along the inner arc side of the arc plate, and the directional stopper and the second guide wheel are located on the same side of the guide plate; one end of the linkage rod is rotatably installed on the inner side of the tightening cover, the other end of the linkage rod is rotatably installed with a linkage block, the linkage rod is parallel arranged, the side close to the guide plate of the linkage block is fixedly installed with a brake block, the inner side of the tightening cover is fixedly installed with a limiting block, and the limiting block is located between the linkage rod and the second guide wheel; the outer side of the tightening cover is fixedly installed with a support plate and a third guide block, the third guide block is symmetrically arranged and located on the same side of the support plate, a rack is slidably installed between the two third guide blocks and the tightening cover, one end of the rack is fixedly assembled with a pulling and pressing force sensor through a pulling block, a dead block is located between the pulling block and the tightening cover, the support plate is installed with a second speed reducer motor, a gear is fixedly installed on the output shaft of the second speed reducer motor, and the gear and the rack are meshingly assembled; the inner side of the tightening cover is rotatably installed with a V-shaped rod, both ends of the V-shaped rod are rotatably installed with rollers, the roller at one end abuts against the pulling block, and the roller at the other end abuts against the linkage rod; the side wall of the tightening cover is fixedly installed with a first position sensor for detecting the pulling block.

[0010] Further, the cover plate assembly comprises a bottom plate, a second guide block, a first friction block and a cover plate; the bottom plate is fixedly assembled with the frame, the bottom plate is installed with the second guide block, the second guide block is symmetrically arranged, and the cover plate is slidably installed between the two second guide blocks; the cover plate is fixedly installed with the first friction block.

[0011] Further, the door opening driving assembly comprises a first servo motor, a swing rod, a connecting rod and a translation block; the translation block is fixedly installed on the cover plate, the first servo motor is fixedly installed on the bottom plate, one end of the swing rod is fixedly installed on the output shaft of the first servo motor, the other end of the swing rod is rotatably assembled with one end of the connecting rod, and the other end of the connecting rod is rotatably assembled with the translation block; the second position sensor for detecting the swing rod is installed on the bottom plate and the first servo motor.

[0012] Further, the buckle making module unit comprises a buckle making frame, a fork, a pressure sensor, and a second friction block; the buckle making frame is fixedly assembled with the bottom plate, one end of the buckle making frame is insertedly assembled with three connecting columns, the other end of the buckle making frame is insertedly assembled with three stepped columns, the first pressing block, the second friction block and the second pressing block are sequentially installed at the end of the three stepped columns away from the connecting columns, the middle stepped column is further fixedly installed with a blade, the blade and the second pressing block are located on the side of the second friction block close to the detection assembly, the second friction block and the first friction block are oppositely arranged, the second pressing block is provided with a shearing channel for the PET tape, the middle stepped column is fixedly installed with a guide pin, the second friction block is provided with a long hole, the guide pin is inserted in the long hole, the side of the second friction block is fixedly installed with a connecting ring for connecting the vibration assembly, the middle stepped column is installed with a straight roller belt, the roller column of the straight roller belt abuts against the second friction block; the end of the connecting column close to the stepped column is fixedly installed with one end of the pressure sensor, the other end of the pressure sensor abuts against the groove plate; the buckle making frame is rotatably assembled with three forks, the rod portions of the forks are fixedly installed with wear-resistant heads, the wear-resistant heads respectively abut against the ends of the connecting columns away from the stepped columns; the sidewall of the buckle making frame is fixedly installed with a cover plate stop seat, the cover plate stop seat is insertedly assembled with a cover plate, the cover plate stop seat is fixedly installed with three guide columns, the same end of the groove plate is provided with guide holes, and the guide columns are respectively insertedly assembled with the guide holes. The buckle making frame is fixedly installed with a third position sensor for detecting the middle groove plate.

[0013] Further, the buckle making frame is fixedly installed with three lead screw modules through the support frame, the sliding tables of the three lead screw modules are rotatably installed with driving wheels through the extension frames, and the driving wheels are respectively located in the fork grooves of the forks;

[0014] Further, the vibration assembly comprises a second servo motor, a driving pulley, a driven pulley, a bearing seat, a toothed belt, a vibration arm and an eccentric shaft; the bearing seat and the second servo motor are fixedly installed on the bottom plate, the bearing seat is rotatably assembled with the eccentric shaft, one end of the eccentric shaft is rotatably installed with the vibration arm through a sleeve, the other end of the eccentric shaft is fixedly installed with the driven pulley, the output shaft of the second servo motor is fixedly installed with the driving pulley, the driving pulley and the driven pulley are connected through the toothed belt, and the end of the vibration arm away from the eccentric shaft is rotatably assembled with the connecting ring.

[0015] Further, the detection assembly comprises a guide seat, a dial piece and a pressing piece; the guide seat is fixedly assembled with the buckling frame, the inside of the guide seat is provided with a guide channel, the inside of the guide seat is provided with a first mounting groove and a second mounting groove in communication with the guide channel, one end of the dial piece is rotatably mounted in the first mounting groove through a torsion shaft, the other end of the dial piece is fixedly provided with a first detection rod, one end of the pressing piece is rotatably mounted in the second mounting groove, the other end of the pressing piece is provided with a second detection rod, and the inside of the second mounting groove is provided with a reset spring for jacking the pressing piece through an external thread cap; the side wall of the guide seat is fixedly provided with a fourth position sensor for detecting the first detection rod and a fifth position sensor for detecting the second detection rod.

[0016] Further, the guide assembly comprises a second elastic member, a light rod, a pressing plate, a retaining ring; the side walls of the buckling frame, the tightening shell and the guide seat are all provided with the pressing plate; the buckling frame, the tightening shell, the guide seat and the pressing plate are all provided with a through hole, the light rod is inserted into the through hole, the end of the light rod is provided with the retaining ring through a snap pin, the light rod is sleeved with the second elastic member, and the second elastic member abuts between the retaining ring and the pressing plate.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] The motor and mechanical transmission mode is used to complete the processes of supplying the belt, tensioning and buckling, thereby replacing the traditional cylinder driving mode, occupying a smaller space, and being stable and reliable in power, capable of meeting the fast-paced bundling and buckling requirements and improving the bundling efficiency; the structure of each part is modularized, facilitating assembly and replacement and maintenance; the position sensor, the encoder and other structures are arranged to detect the key positions of the belt supplying, tensioning and buckling, so that the length of the conveying belt, the conveying position and the displacement position are more accurate, the buckling quality is ensured, and timely feedback and maintenance can be performed when the action is not in place. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic perspective view of the whole application;

[0020] Figure 2 It is a structural schematic perspective view of the frame of the application;

[0021] Figure 3 It is a structural schematic perspective view of the angle 1 of the buckling module unit of the application;

[0022] Figure 4 It is a structural schematic perspective view of the angle 2 of the buckling module unit of the application;

[0023] Figure 5 It is a structural schematic front view of the belt supplying module unit with the belt shell disassembled of the application;

[0024] Figure 6A structure schematic perspective view of the supply belt cover disassembled from the supply belt module unit of the present application;

[0025] Figure 7 A structure schematic perspective view of the tightening cover disassembled from the tightening module unit of the present application;

[0026] Figure 8 A structure schematic left view of the tightening module unit of the present application;

[0027] Figure 9 A structure schematic perspective view of the cover plate assembly of the present application;

[0028] Figure 10 A structure schematic perspective view of the door opening driving assembly of the present application;

[0029] Figure 11 A structure schematic perspective view of the fastening module unit of the present application;

[0030] Figure 12 A structure schematic sectional view of the fastening module unit of the present application;

[0031] Figure 13 A structure schematic perspective view of the second friction block of the present application;

[0032] Figure 14 A structure schematic sectional view of the second friction block of the present application;

[0033] Figure 15 A structure schematic perspective view of the vibration assembly of the present application;

[0034] Figure 16 A structure schematic perspective view of the tension and pressure sensor of the present application;

[0035] Figure 17 A structure schematic perspective view of the guiding assembly of the present application;

[0036] Figure 18 A structure schematic perspective view of the detecting assembly of the present application;

[0037] Figure 19 A structure schematic sectional view of the detecting assembly of the present application.

[0038] In the figure: 1 supply belt module unit, 101 first speed reducer motor, 102 supply belt housing, 103 supply belt wheel, 104 fixed rod, 105 roller, 106 connecting rod, 107 first elastic member, 108 guide ring, 109 light pole screw, 110 stop ring, 111 moving plate, 112 first guide block, 113 wrench, 114 encoder, 115 tensioning wheel; 2 detection assembly, 201 guide seat, 202 guide channel, 203 second detection rod, 204 pressing piece, 205 first detection rod, 206 shifting piece, 207 fifth position sensor, 208 fourth position sensor, 209 reset spring; 3 vibration assembly, 301 driven belt wheel, 302 vibration arm, 303 eccentric shaft, 304 bearing seat, 305 drive belt wheel, 306 second servo motor, 307 toothed belt; 4 guide assembly, 401 second elastic member, 402 light pole, 403 pressing plate, 404 stop ring; 5 tightening module unit, 501 first guide wheel, 502 directional stop block, 503 guide plate, 504 brake block, 505 linkage block, 506 linkage rod, 507 pull block, 508 first position sensor, 509 V-shaped rod, 510 second guide wheel, 511 limit block, 512 tightening housing, 513 second speed reducer motor, 514 support plate, 515 gear, 516 third guide block, 517 rack; 6 knotting module unit, 601 third elastic member, 602 step column, 603 first pressing block, 604 second friction block, 605 blade, 606 second pressing block, 607 groove plate, 608 pressure sensor, 609 knotting frame, 610 connecting column, 611 wear-resistant head, 612 shifting fork, 613 connecting ring, 614 straight-line roller belt, 615 guide column, 616 cover plate stop seat, 617 third position sensor; 7 cover plate assembly, 701 second guide block, 702 cover plate, 703 first friction block, 704 bottom plate; 8 door opening driving assembly, 801 first servo motor, 802 swing lever, 803 second position sensor, 804 connecting rod, 805 translation block; 9 pull pressure sensor, 10 neutral gear, 11 guide rail, 12 lead screw module, 13 frame. DETAILED DESCRIPTION

[0039] Please refer to Figures 1 to 19 The application provides a band buckle type PET band bundling machine head for packaging, comprising a supply belt module unit 1, a frame 13, a tightening module unit 5, a knotting module unit 6, a cover plate assembly 7, a door opening driving assembly 8, a vibration assembly 3, a guide assembly 4 and a detection assembly 2.

[0040] One side of the cover plate assembly 7 is mounted with the buckle making module unit 6, the door opening driving assembly 8 and the vibration assembly 3; the door opening driving assembly 8 is used for controlling the opening and closing action of the cover plate assembly 7, the buckle making module unit 6 is used for pressing, buckling and cutting the two layers of PET bands, and the vibration assembly 3 is used for rubbing and melting the butt joint of the two layers of PET bands; one side of the band feeding module unit 1 is mounted with the tightening module unit 5; the band feeding module unit 1 is used for feeding the PET band to the tightening module unit 5, and the tightening module unit 5 is used for tightening the bundled PET band before melting;

[0041] The same side of the frame 13 is fixedly mounted with two pairs of guide rails 11, the cross section of the guide rail 11 is U-shaped structure, the side of the band feeding module unit 1 and the tightening module unit 5 away from each other is rotatably mounted with a first roller through a support frame, the first roller is rollingly assembled on one of the two pairs of guide rails 11; the side of the cover plate assembly 7 and the buckle making module unit 6 away from each other is rotatably mounted with a second roller through a support frame, the second roller is rollingly assembled on the other of the two pairs of guide rails 11; one end of the tensile force sensor 9 is fixedly mounted on the side wall of the buckle making module unit 6, and the other end of the tensile force sensor 9 is connected and assembled with the tightening module unit 5; so that the band feeding module unit 1 and the tightening module unit 5 form one working part, the cover plate assembly 7, the buckle making module unit 6, the door opening driving assembly 8 and the vibration assembly 3 form another working part, the two working parts are connected through the tensile force sensor 9, and the two working parts can move along the two pairs of guide rails 11, adaptively adjusting the position of the melting joint relative to the bundled articles;

[0042] The side wall of the buckle making module unit 6 is provided with a detection assembly 2, and the buckle making module unit 6, the detection assembly 2 and the tightening module unit 5 are all mounted with a guide assembly 4; the detection assembly 2 is used for detecting whether the two layers of PET bands are butt jointed in place, and the guide assembly 4 is used for assisting the smooth conveying of the PET bands at various places;

[0043] The frame 13 is fixedly mounted with a dead stop 10 for positioning the tightening module unit 5; when the tightening module unit 5 is reset, the dead stop 10 can be clamped, so that the tightening module unit 5 and all parts connected therewith return to the initial position along the two pairs of guide rails 11.

[0044] Specifically, as shown in Figure 5 and Figure 6 The band feeding module unit 1 includes a band feeding shell 102, a first speed reducer motor 101, a band feeding wheel 103 and a tensioning wheel 115; a pair of first guide blocks 112 is fixedly mounted on the inner side of the band feeding shell 102, a moving plate 111 is slidably mounted between the first guide block 112 and the side wall of the band feeding shell 102, and the tensioning wheel 115 is rotatably assembled on the moving plate 111 through a rotating shaft; the cross section of the first guide block 112 is L-shaped, the inner side of the moving plate 111 moves more smoothly, and the moving plate 111 can be prevented from being separated from the first guide block 112;

[0045] Two guide rings 108 are fixedly installed in the tape cover 102, and are located on the sides of the first guide blocks 112 away from each other. One end of the connecting rod 106 is fixedly installed on both sides of the moving plate 111, and the other end of the connecting rod 106 extends to the guide ring 108. The light rod screw 109 is inserted into the guide ring 108, and the light rod screw 109 is connected and assembled with the connecting rod 106. The connecting rod 106 is provided with a threaded hole for connecting the light rod screw 109. The light rod screw 109 is sleeved with the first elastic element 107, and the first elastic element 107 abuts between the guide ring 108 and the connecting rod 106. The first elastic element 107 is preferably a spiral spring. The first elastic element 107 makes the connecting rod 106 have a elastic force moving away from the guide ring 108, until the nut of the light rod screw 109 abuts against the guide ring 108, and the light rod screw 109 can only move along the axial direction of the guide ring 108, playing a guiding role.

[0046] The tape cover 102 is rotatably assembled with one end of the wrench 113 through the support column. The other end of the wrench 113 extends out of the tape cover 102. The tape cover 102 is provided with an opening for extending the wrench 113. One side of the wrench 113 is rotatably assembled with the rotating shaft. When the staff manually turns the wrench 113, the rotating shaft on the moving plate 111 can be controlled through the lever principle, so as to control the movement of the tensioning wheel 115, and at the same time, the first elastic element 107 is compressed. When the external force disappears, it is automatically reset.

[0047] The tape wheel 103 is rotatably assembled inside the tape cover 102. The tape cover 102 is fixedly installed with a conveying channel between the tape wheel 103 and the tensioning wheel 115. The two sides of the tape cover 102 are provided with a conveying port matched with the conveying channel. The PET tape can pass through the conveying channel through the conveying port, and the PET tape is clamped between the tape wheel 103 and the tensioning wheel 115.

[0048] The first speed reducer motor 101 is fixedly installed on the outside of the tape cover 102. The output shaft of the first speed reducer motor 101 penetrates the tape cover 102 and is fixedly assembled with the tape wheel 103. The tape cover 102 is provided with a hole for penetrating the output shaft of the first speed reducer motor 101. The first speed reducer motor 101 can drive the tape wheel 103 to rotate, so as to clamp the PET tape stored on the tape storage wheel between the tape wheel 103 and the tensioning wheel 115 and convey it. When the PET tape stored on the tape storage wheel is used up, the wrench 113 is turned to separate the tape wheel 103 and the tensioning wheel 115, so as to facilitate the withdrawal of the PET tape conveyed into the machine head.

[0049] The tensioning wheel 115 is fixedly installed with a blocking ring 110 close to one end of the wrench 113; the diameter of the blocking ring 110 is larger than that of the tensioning wheel 115, which blocks the PET belt and avoids the PET belt from moving to affect the contact area between the PET belt and the feeding wheel 103 and the tensioning wheel 115, thereby affecting the normal conveying;

[0050] The encoder 114 is fixedly installed in the feeding cover 102, the rotating shaft of the encoder 114 is fixedly installed with the roller 105, one side of the roller 105 extends into the conveying channel; the conveying channel is provided with a slot for passing through the roller 105, and the outer periphery of the roller 105 is fixedly installed with a rubber sleeve, which can increase the friction force of the contact with the PET belt; when the PET belt is conveyed, the roller 105 can be driven to rotate, thereby converting the linear conveying distance information into an electronic signal through the encoder 114 and transmitting it outward, so as to ensure that the length of the PET belt conveyed each time is more accurate.

[0051] Specifically, as shown in Figure 7 and Figure 8 The tightening module unit 5 includes a tightening cover 512, a guide plate 503, a second speed reducer motor 513, a pulling block 507 and a support plate 514; the tightening cover 512 and the feeding cover 102 are fixedly assembled through the fixing rod 104; the two ends of the tightening cover 512 are open, the inner side of the tightening cover 512 is fixedly installed with the guide plate 503 and the directional blocking block 502, the guide plate 503 is composed of a straight plate and an arc plate, which guides the conveying of the PET belt, the inner side of the tightening cover 512 is rotatably assembled with the first guide wheel 501, the first guide wheel 501 is symmetrically arranged at the end of the straight plate away from the arc plate, the inner side of the tightening cover 512 is uniformly provided with a plurality of second guide wheels 510 along the inner arc side of the arc plate, and the directional blocking block 502 and the second guide wheel 510 are located on the same side of the guide plate 503; the tightening cover 512 is provided with an input port corresponding to the arc plate, the PET belt is output from the feeding module unit 1, enters the tightening cover 512 through the input port, and continues to be conveyed along the guide plate 503, the first guide wheel 501, the directional blocking block 502 and the second guide wheel 510 can accurately move and send out the PET belt along the guide plate 503;

[0052] The inner side of the tightening cover 512 is rotatably assembled with one end of the linkage rod 506, the other end of the linkage rod 506 is rotatably assembled with the linkage block 505, and the linkage rod 506 is parallel arranged; the linkage rod 506 and the linkage block 505 form a movable parallelogram linkage structure; the linkage block 505 is fixedly installed with the brake block 504 close to one side of the guide plate 503, the brake block 504 is uniformly provided with sharp heads close to one side of the guide plate 503, which is used to increase the friction force of the contact with the PET belt, the inner side of the tightening cover 512 is fixedly installed with the limiting block 511, and the limiting block 511 is located between the linkage rod 506 and the second guide wheel 510;

[0053] The outer side of the tightening cover 512 is fixedly provided with a support plate 514 and third guide blocks 516, the third guide blocks 516 are symmetrically arranged on the same side of the support plate 514, a rack 517 is slidingly arranged between the two third guide blocks 516 and the tightening cover 512, one end of the rack 517 is fixedly assembled with the pulling block 507 through the pulling pressure sensor 9, the dead stop 10 is located between the pulling block 507 and the tightening cover 512, the support plate 514 is provided with a second speed reducer 513, the output shaft of the second speed reducer 513 is fixedly provided with a gear 515, the gear 515 and the rack 517 are engagedly assembled; the support plate 514 is provided with a hole for passing through the output shaft of the second speed reducer 513, the second speed reducer 513 can rotate the gear 515 in the forward and reverse directions, and the engaged rack 517 can adjust the distance between the pulling block 507 and the support plate 514;

[0054] The inner side of the tightening cover 512 is rotatably provided with a V-shaped rod 509, both ends of the V-shaped rod 509 are rotatably provided with rollers, one end of the roller abuts against the pulling block 507, and the other end of the roller abuts against the linkage rod 506; the V-shaped rod 509 can transmit the force on the pulling block 507 to control the action at the linkage rod 506, when the pulling block 507 is close to the tightening cover 512, the linkage rod 506 can be pressed by the V-shaped rod 509 to abut against the limiting block 511, so that the brake block 504 swings to a position away from the guide plate 503, at this time, the PET tape can be conveyed; when the pulling block 507 is away from the tightening cover 512, the force of the V-shaped rod 509 on the linkage rod 506 disappears, the brake block 504 will swing to a position close to the guide plate 503 until it abuts against the directional block 502, at this time, the brake block 504 will tightly abut the PET tape on the guide plate 503 and cannot be conveyed; the side wall of the tightening cover 512 is fixedly provided with a first position sensor 508 for detecting the pulling block 507; when the pulling block 507 moves close to the support plate 514 to the position, the first position sensor 508 can transmit an accurate signal to the outside.

[0055] Specifically, as shown in Figure 9 The cover plate assembly 7 includes a bottom plate 704, second guide blocks 701, first friction blocks 703 and a cover plate 702; the bottom plate 704 is fixedly assembled with the frame 13, the bottom plate 704 is provided with the second guide blocks 701, the second guide blocks 701 are symmetrically arranged, the cross section of the second guide blocks 701 is L-shaped structure, the cover plate 702 is slidingly arranged between the two second guide blocks 701, and the cover plate 702 is fixedly provided with the first friction blocks 703; the side of the first friction blocks 703 away from the cover plate 702 is uniformly provided with a sharp head for increasing the friction force of contact with the PET tape, when the cover plate 702 is closed, the first friction blocks 703 are located at the welding position of the two layers of PET tapes, and when the cover plate 702 is opened, the PET tape can be separated.

[0056] Specifically, as shown in Figure 10As shown, the door opening driving assembly 8 includes a first servo motor 801, a swing rod 802, a connecting rod 804 and a translation block 805; the translation block 805 is fixedly installed on the cover plate 702, the first servo motor 801 is fixedly installed on the bottom plate 704, one end of the swing rod 802 is fixedly installed on the output shaft of the first servo motor 801, the other end of the swing rod 802 is rotatably assembled with one end of the connecting rod 804, and the other end of the connecting rod 804 is rotatably assembled with the translation block 805; the first servo motor 801 can swing the swing rod 802 through forward and reverse rotation, and can control the cover plate 702 to open and close along the second guide block 701 after transmission through the connecting rod 804;

[0057] A second position sensor 803 is installed on the bottom plate 704 and the first servo motor 801 for detecting the swing rod 802; one of the second position sensors 803 is used to detect whether the swing rod 802 swings to a position at which the cover plate 702 is completely opened, and the other second position sensor 803 is used to detect whether the swing rod 802 swings to a position at which the cover plate 702 is completely closed, so that the action is accurate and reliable.

[0058] Specifically, as shown in Figure 11 and Figure 12 As shown, the making buckle module unit 6 includes a making buckle frame 609, a fork 612, a pressure sensor 608, a second friction block 604, and the fork 612 is mainly composed of a rod part and a fork groove at one end of the rod part; the making buckle frame 609 is fixedly assembled with the bottom plate 704, one end of the making buckle frame 609 is insertedly assembled with three connecting columns 610, and the other end of the making buckle frame 609 is insertedly assembled with three stepped columns 602; correspondingly, the making buckle frame 609 is provided with through holes for penetrating the stepped columns 602 and the connecting columns 610, the end portions of the three stepped columns 602 away from the connecting columns 610 are sequentially provided with a first pressing block 603, the second friction block 604 and a second pressing block 606, the end portions of the first pressing block 603, the second friction block 604 and the second pressing block 606 away from the stepped columns 602 are uniformly provided with sharp heads for increasing the friction force of contact with the PET belt, and the middle stepped column 602 is further fixedly installed with a blade 605, and the blade 605 and the second pressing block 606 are located on the side of the second friction block 604 close to the detection assembly 2; the second friction block 604 and the first friction block 703 are oppositely arranged for contacting two layers of PET belts respectively; the second pressing block 606 is further provided with a shearing channel for penetrating the PET belt, and the blade 605 can cut off the PET belt penetrating the shearing channel along with the extension of the middle stepped column 602;

[0059] As shown in Figure 13 and Figure 14As shown, the middle step column 602 is fixedly installed with a guide pin, and the second friction block 604 is provided with a long hole, and the guide pin is inserted into the long hole. One side of the second friction block 604 is fixedly installed with a connecting ring 613 for connecting the vibration assembly 3. The middle step column 602 is installed with a linear roller belt 614, and the roller column of the linear roller belt 614 abuts against the second friction block 604. The vibration assembly 3 can repeatedly move the second friction block 604 through the connecting ring 613, and the long hole moves along the guide pin, thereby ensuring the stability of the repeated movement. The linear roller belt 614 is mainly composed of a rotating roller frame and a plurality of roller columns rotating in the rotating roller frame, and is used for reducing the friction force generated when the second friction block 604 and the step column 602 move relative to each other.

[0060] The end of the step column 602 close to the connecting column 610 is fixedly installed with a groove plate 607, and the step column 602 is sleeved with a third elastic member 601. The third elastic member 601 is preferably a cylindrical spring, and abuts between the buckle frame 609 and the groove plate 607. The end of the connecting column 610 close to the step column 602 is fixedly installed with one end of a pressure sensor 608, and the other end of the pressure sensor 608 abuts against the groove plate 607. The pressure sensor 608 is a Tianmu NS-WL1 tension and pressure sensor.

[0061] The buckle frame 609 is rotationally assembled with three shift forks 612, and the rod portions of the shift forks 612 are fixedly installed with wear-resistant heads 611, respectively. The wear-resistant heads 611 abut against the ends of the connecting column 610 away from the step column 602, respectively. When the shift forks 612 are controlled to swing, the wear-resistant heads 611 can be pressed against the connecting column 610, respectively, through the lever principle. After being transmitted through the pressure sensor 608 and the groove plate 607, the step column 602 can be made to protrude from the buckle frame 609, so that the first pressing block 603 and the second pressing block 606 press the two sides of the fusion joint. The second friction block 604 can be vibrated repeatedly while being pressed, so that the two layers of PET belts in contact are fused due to frictional heat. The pressure sensor 608 can ensure that the pressure applied to each step column 602 is sufficient to meet the use requirements of each function and timely feedback, which is beneficial to adjusting the applied pressure in the later period. After the shift forks 612 are reset, the third elastic member 601 can also reset the groove plate 607 and the step column 602.

[0062] The side wall of the buckle frame 609 is fixedly installed with a cover plate stop seat 616, and the cover plate stop seat 616 is inserted and assembled with a cover plate 702. The cover plate 702 abuts against the cover plate stop seat 616 during the fusion of the buckle, and supports the PET belt at the fusion joint. After the fusion of the buckle, the cover plate 702 is separated from the cover plate stop seat 616, and the fused PET belt can be pulled out. The cover plate stop seat 616 is fixedly installed with three guide columns 615, and the same end of the groove plate 607 is provided with a guide hole. The guide columns 615 are respectively inserted and assembled with the guide holes. Through the cooperation of the guide columns 615 and the guide holes, the stability of the movement of the groove plate 607 can be improved.

[0063] The third position sensor 617 is fixedly installed on the buckle frame 609 and is used to detect the third position of the intermediate groove plate 607; the third position sensor 617 can detect whether the second friction block 604 is pressed against the PET belt and timely feedback position information; the buckle frame 609 is fixedly installed with three screw rod modules 12 through the support frame; the screw rod module 12 is mainly composed of an existing component such as a shell, a servo motor, a shaft coupling, a screw rod, a nut and a sliding table; the sliding table of the three screw rod modules 12 is rotatably installed with a driving wheel through an extension frame, and the driving wheel is located in the fork groove of the yoke 612; the repeated movement of the sliding table of the screw rod module 12 is controlled, so as to control the swinging action of each yoke 612.

[0064] Specifically, as shown in Figure 15 The vibration assembly 3 includes a second servo motor 306, a driving pulley 305, a driven pulley 301, a bearing seat 304, a toothed belt 307, a vibration arm 302 and an eccentric shaft 303; the bearing seat 304 and the second servo motor 306 are fixedly installed on the bottom plate 704, the bearing seat 304 is rotatably assembled with the eccentric shaft 303, one end of the eccentric shaft 303 is rotatably installed with the vibration arm 302 through a sleeve, the other end of the eccentric shaft 303 is fixedly installed with the driven pulley 301, the output shaft of the second servo motor 306 is fixedly installed with the driving pulley 305, the driving pulley 305 and the driven pulley 301 are connected through the toothed belt 307, and the end of the vibration arm 302 away from the eccentric shaft 303 is rotatably assembled with the connecting ring 613; the eccentric shaft 303 is composed of two shafts with different axes, the second servo motor 306 can rotate the eccentric shaft 303 through the driving pulley 305 and the driven pulley 301 when working, so that the sleeve rotates eccentrically, the vibration arm 302 generates repeated vibration, and the second friction block 604 is driven to reciprocate.

[0065] Specifically, as shown in Figure 18 and Figure 19As shown, the detection assembly 2 comprises a guide seat 201, a push piece 206 and a pressing piece 204; the guide seat 201 is fixedly assembled with the buckle frame 609, and is a component combined by a side plate and two internal passage blocks, facilitating manufacturing; the guide seat 201 is internally provided with a guide passage 202, and is internally provided with a first mounting groove and a second mounting groove in communication with the guide passage 202, one end of the push piece 206 is rotatably mounted in the first mounting groove through a torsion shaft, the torsion shaft is a component composed of a shaft rod and a torsion spring, the torsion spring is sleeved on the shaft rod, one end of the torsion spring is fixedly assembled with the first mounting groove and the other end is fixedly assembled with the push piece 206; the other end of the push piece 206 is fixedly mounted with a first detection rod 205, the torsion shaft enables the push piece 206 to have an oscillating force close to the guide assembly 4; one end of the pressing piece 204 is rotatably mounted in the second mounting groove, the other end of the pressing piece 204 is mounted with a second detection rod 203, and the second mounting groove is internally mounted with a reset spring 209 for jacking the pressing piece 204 through an external thread cap; the guide seat 201 is provided with a screw hole for mounting the external thread cap close to the guide assembly 4, and the external thread cap and the pressing piece 204 are both provided with a groove on the side close to each other, the reset spring 209 is inserted between the grooves, and the action force of the reset spring 209 for jacking the pressing piece 204 can be adjusted through the external thread cap; the guide seat 201 is provided with a long slot for passing through the first detection rod 205 and the second detection rod 203.

[0066] The side wall of the guide seat 201 is fixedly mounted with a fourth position sensor 208 for detecting the first detection rod 205 and a fifth position sensor 207 for detecting the second detection rod 203; the normally conveyed PET belt will press down one end of the pressing piece 204 when passing through the guide passage 202, so that the second detection rod 203 is aligned with the fifth position sensor 207, and a signal of normal belt entry is detected; the PET belt returning around the bundled object can enter the guide assembly 4 on the side of the detection assembly 2, and will jack up one end of the push piece 206 at the same time, so that the first detection rod 205 oscillates to be aligned with the fourth position sensor 208, and a signal of normal return belt is detected.

[0067] Specifically: as Figure 17As shown, the guide assembly 4 includes a second elastic member 401, a light pole 402, a pressing plate 403, a retaining ring 404; a buckle frame 609, a tightening shell 512 and the side walls of the guide seat 201 are each provided with the pressing plate 403, the cross section of the pressing plate 403 is L-shaped, a space is left between the two pressing plates 403, and the preferred space width is one third of the width of the PET belt, so as to ensure the PET belt conveying and facilitate the PET belt stress out; the pressing plate 403, the buckle frame 609, the tightening shell 512 and the guide seat 201 are each provided with a through hole, the light pole 402 is inserted into the through hole, the end of the light pole 402 is provided with the retaining ring 404 through a snap pin, the light pole 402 is sleeved with the second elastic member 401, the second elastic member 401 is preferably a cylindrical spring, and the second elastic member 401 is abutted between the retaining ring 404 and the pressing plate 403; the second elastic member 401 makes the two pressing plates 403 have a force of approaching each other.

[0068] The belt supply shell 102 and the tightening shell 512 are both split shells, which are connected into a complete shell through screws, so as to facilitate the production, installation and maintenance; the first guide block 112, the second guide block 701 and the third guide block 516 are preferably made of copper, so that the relative movement is smoother.

[0069] The first speed reducer 101 and the second speed reducer 513 are both existing components including a motor body, a shaft coupling and a speed reducer; the first position sensor 508, the second position sensor 803, the third position sensor 617, the fourth position sensor 208 and the fifth position sensor 207 are preferably m8 OMRON proximity switches; the tension sensor 9 is a tension sensor of the NS-WL5 series of Tianmu; the encoder 114 is preferably an E6B2-CWZ5B 100P R2M encoder of OMRON.

[0070] The specific application mode of the embodiment is as follows:

[0071] The bundling machine is a component with a conveying belt, a lifting platform, a tape storage wheel and an arrow guide groove; during installation, the machine head is fixedly installed on the main body of the bundling machine through the frame 13 and located above the lifting platform, the cover plate assembly 7 is arranged downward, and all electrical components are electrically connected with the controller in the control cabinet of the bundling machine; during work, the PET tape on the tape storage wheel is sent into the tightening module unit 5 through the conveying channel, continues to be conveyed into the detection assembly 2 along the guide plate 503, enters the knot making position between the cover plate 702 and the second friction block 604 along the guide channel 202 and the shearing channel of the second compression block 606, at this time, one end of the compression sheet 204 is pressed down, the second detection rod 203 is aligned with the fifth position sensor 207, a normal feeding signal is detected, then the knot making module unit 6 side guide assembly 4 enters the arrow guide groove of the bundling machine, winds around the object to be bundled on the lower side, enters the guide assembly 4 in the tightening module unit 5, and then enters the guide assembly 4 in the detection assembly 2, the PET tape end returns to the position between the cover plate 702 and the second friction block 604 and overlaps with the part of the PET tape continuously conveyed, and the excess PET tape also extends into the guide assembly 4 on the knot making frame 609; at this time, the first compression block 603 and the second friction block 604 are stationary, and the second compression block 606 extends and compresses the returned PET tape;

[0072] When the pull block 507 and the tightening shell 512 of the tightening module unit 5 are away from each other, the force of the V-shaped rod 509 on the linkage rod 506 disappears, the linkage rod 506 swings at the same time due to the natural falling of the end of the brake block 504, the lower end of the brake block 504 contacts the PET tape and can continue to swing to the directional stop block 502 and be fixed on the guide plate 503 through the PET tape; after the pull block 507 and the tightening shell 512 continue to move away from each other, the distance between the tightening module unit 5 and the knot making module unit 6 is increased, the second reduction motor 513 is stopped when the tensioning sensor 9 reaches the set tensioning value, at this time, the part of the PET tape compressed by the second compression block 606 is stationary, and the PET tape previously conveyed can move back along the shearing channel of the second compression block 606, so that the PET bundled object can be tightened; because one working part formed by the feeding module unit 1 and the tightening module unit 5 and the other working part formed by the cover plate assembly 7, the knot making module unit 6, the door opening driving assembly 8 and the vibration assembly 3 can move on the two pairs of guide rails 11 through the first roller and the second roller, when the center of gravity of the bundled object deviates, the whole can be appropriately translated to adjust the position of the fusion position, ensure that the knot making position has low stress, facilitate the tightening and fusion of the PET tape, and improve the bundling and splicing quality;

[0073] Then the first compression block 603 extends, and the compressed and overlapped PET band is compressed; the second friction block 604 extends again, and the overlapped PET band is compressed, and the blade 605 extends simultaneously with the second friction block 604, and the PET band passing through the shearing channel is cut off, so that the PET band forms a complete loop;

[0074] The vibration assembly 3 vibrates the second friction block 604, cooperates with the first friction block 703, so that the two layers of PET bands in contact are fused due to friction, and after cooling, the buckle module unit 6 is reset; the cover plate 702 is opened again, and the lifting platform is reset downward, and the bundled articles move downward due to gravity, and because the two side compression plates 403 can move along the light pole 402, the PET band between the compression plates 403 is not affected;

[0075] When the pulling block 507 and the tightening shell 512 of the tightening module unit 5 are close to each other to the set position, that is, when the dead stop 10 is clamped, the working part formed by the supply module unit 1 and the tightening module unit 5 and the other working part formed by the cover plate assembly 7, the buckle module unit 6, the door opening driving assembly 8 and the vibration assembly 3 can be restored to the initial position, and at the same time, the pulling block 507 repositions the linkage rod 506 against the limiting block 511 through the V-shaped rod 509, and the brake block 504 is lifted, and after the parts are reset, the PET band can pass normally, and the next bundling work can be performed;

[0076] When the position sensor at each position detects an abnormal movement, a signal can be transmitted to the control cabinet of the bundling machine, and through the alarm and the corresponding detection lamp on the control cabinet, the fault position can be found in time, so that timely maintenance can be facilitated.

Claims

1. A strap-on PET strap bundling head for packaging, characterized by: It comprises a belt feeding module unit (1), a frame (13), a tightening module unit (5), a buckle making module unit (6), a cover assembly (7), an opening door driving assembly (8), a vibration assembly (3), a guide assembly (4) and a detection assembly (2); One side of the cover assembly (7) is provided with the buckle making module unit (6), the opening door driving assembly (8) and the vibration assembly (3); one side of the belt feeding module unit (1) is provided with the tightening module unit (5); The same side of the frame (13) is fixedly provided with two pairs of guide rails (11), and the side, away from each other, of the belt feeding module unit (1) and the tightening module unit (5) is rotatably provided with a first roller through a support frame, and the first roller is rollingly assembled on one of the pairs of guide rails (11); the side, away from each other, of the cover assembly (7) and the buckle making module unit (6) is rotatably provided with a second roller through a support frame, and the second roller is rollingly assembled on the other pair of guide rails (11); One end of a tensile force sensor (9) is fixedly installed on the side wall of the buckle making module unit (6), and the other end of the tensile force sensor (9) is connected and assembled with the tightening module unit (5); The side wall of the buckle making module unit (6) is provided with the detection assembly (2), and the buckle making module unit (6), the detection assembly (2) and the tightening module unit (5) are all provided with the guide assembly (4); The frame (13) is fixedly provided with a dead stop (10) for positioning the tightening module unit (5); The tightening module unit (5) comprises a tightening cover (512), a guide plate (503), a second speed reducer (513), a pulling block (507) and a support plate (514); The tightening cover (512) and the belt feeding cover (102) are fixedly assembled through a fixing rod (104); the two ends of the tightening cover (512) are open, the inner side of the tightening cover (512) is fixedly provided with the guide plate (503) and a directional stop block (502), the guide plate (503) is composed of a straight plate and an arc plate, the inner side of the tightening cover (512) is rotatably provided with a first guide wheel (501), the first guide wheel (501) is symmetrically arranged at the end of the straight plate, away from the arc plate, the inner side of the tightening cover (512) is uniformly provided with a plurality of second guide wheels (510) along the inner arc side of the arc plate, and the directional stop block (502) and the second guide wheels (510) are located on the same side of the guide plate (503); The inner side of the tightening cover (512) is rotatably provided with one end of a linkage rod (506), the other end of the linkage rod (506) is rotatably provided with a linkage block (505), the linkage rod (506) is parallel arranged in two, the side, close to the guide plate (503), of the linkage block (505) is fixedly provided with a brake block (504), the inner side of the tightening cover (512) is fixedly provided with a limiting block (511), and the limiting block (511) is located between the linkage rod (506) and the second guide wheel (510); The outer side of the tightening cover (512) is fixedly provided with a support plate (514) and a third guide block (516), the third guide block (516) is symmetrically arranged and located on the same side of the support plate (514), a rack (517) is slidingly arranged between the two third guide blocks (516) and the tightening cover (512), one end of the rack (517) is fixedly assembled with a pulling block (507) and a tension sensor (9), a dead stop (10) is located between the pulling block (507) and the tightening cover (512), the support plate (514) is provided with a second speed reducer (513), the output shaft of the second speed reducer (513) is fixedly provided with a gear (515), and the gear (515) and the rack (517) are engagedly assembled; The inner side of the tightening cover (512) is rotatably provided with a V-shaped rod (509), both ends of the V-shaped rod (509) are rotatably provided with roller wheels, one end of the roller wheel abuts against the pulling block (507), and the other end of the roller wheel abuts against the linkage rod (506); The side wall of the tightening cover (512) is fixedly provided with a first position sensor (508) for detecting the pulling block (507).

2. A banding head for use in packaging according to claim 1, characterized in that: The tape supply module unit (1) comprises a tape supply cover (102), a first speed reducer (101), a tape supply wheel (103) and a tension wheel (115); The inner side of the tape supply cover (102) is fixedly provided with a pair of first guide blocks (112), the first guide blocks (112) and the side wall of the tape supply cover (102) are slidingly provided with a moving plate (111), the moving plate (111) is rotatably provided with the tension wheel (115) through a rotating shaft; The inner side of the tape supply cover (102) is fixedly provided with two guide rings (108), the guide rings (108) are located on the sides away from each other of the first guide blocks (112), one end of a connecting rod (106) is fixedly arranged on both sides of the moving plate (111), the other end of the connecting rod (106) extends to the guide rings (108) respectively, an optical rod screw (109) is inserted into the guide rings (108), the optical rod screw (109) is connected and assembled with the connecting rod (106), the optical rod screw (109) is sleeved with a first elastic member (107), and the first elastic member (107) abuts between the guide rings (108) and the connecting rod (106); The tape supply cover (102) is rotatably provided with one end of a wrench (113) through a support column, the other end of the wrench (113) extends out of the tape supply cover (102), and one side of the wrench (113) is rotatably provided with a rotating shaft; The tape supply wheel (103) is rotatably arranged in the inner side of the tape supply cover (102); the inner side of the tape supply cover (102) is fixedly provided with a conveying channel, the conveying channel is located between the tape supply wheel (103) and the tension wheel (115), and conveying openings matched with the conveying channel are formed in both sides of the tape supply cover (102); The first speed reducer (101) is fixedly arranged on the outer side of the tape supply cover (102), the output shaft of the first speed reducer (101) penetrates through the tape supply cover (102) and is fixedly assembled with the tape supply wheel (103). The tensioning wheel (115) is fixedly installed with a retaining ring (110) near one end of a wrench (113); The encoder (114) is fixedly installed in the belt supply housing (102), the rotating shaft of the encoder (114) is fixedly installed with a roller (105), and one side of the roller (105) extends into the conveying channel.

3. A banding head for use in packaging according to claim 2, wherein: The cover plate assembly (7) comprises a bottom plate (704), a second guide block (701), a first friction block (703) and a cover plate (702); The bottom plate (704) is fixedly assembled with the frame (13), the second guide block (701) is installed on the bottom plate (704), the two second guide blocks (701) are symmetrically arranged, the cover plate (702) is slidingly installed between the two second guide blocks (701), and the first friction block (703) is fixedly installed on the cover plate (702).

4. A banding head for use in packaging according to claim 3, wherein: The door opening driving assembly (8) comprises a first servo motor (801), a swing rod (802), a connecting rod (804) and a translation block (805); The translation block (805) is fixedly installed on the cover plate (702), the first servo motor (801) is fixedly installed on the bottom plate (704), one end of the swing rod (802) is fixedly installed on the output shaft of the first servo motor (801), the other end of the swing rod (802) is rotatably assembled with one end of the connecting rod (804), and the other end of the connecting rod (804) is rotatably assembled with the translation block (805). Second position sensors (803) for detecting the swing rod (802) are installed on the bottom plate (704) and the first servo motor (801).

5. A banding head for use in packaging according to claim 4, wherein: The making buckle module unit (6) comprises a making buckle frame (609), a fork (612), a pressure sensor (608) and a second friction block (604). The making buckle frame (609) is fixedly assembled with the bottom plate (704), one end of the making buckle frame (609) is insertedly assembled with three connecting columns (610), the other end of the making buckle frame (609) is insertedly assembled with three stepped columns (602), the first pressing block (603), the second friction block (604) and the second pressing block (606) are sequentially installed on the ends of the three stepped columns (602) away from the connecting columns (610), the middle stepped column (602) is further fixedly installed with a blade (605), the blade (605) and the second pressing block (606) are located on the side of the second friction block (604) close to the detection assembly (2), the second friction block (604) and the first friction block (703) are oppositely arranged, the second pressing block (606) is provided with a shearing channel for the PET belt, The middle stepped column (602) is fixedly installed with a guide pin, the second friction block (604) is provided with a long hole, the guide pin is inserted into the long hole, one side of the second friction block (604) is fixedly installed with a connecting ring (613) for connecting the vibration assembly (3), the middle stepped column (602) is installed with a straight roller (614), and the roller column of the straight roller (614) abuts against the second friction block (604). The step column (602) is fixedly installed with a groove plate (607) near the end of the connecting column (610), the step column (602) is sleeved with a third elastic member (601), the third elastic member (601) abuts between the buckle frame (609) and the groove plate (607); one end of the pressure sensor (608) is fixedly installed on the end of the connecting column (610) close to the step column (602), and the other end of the pressure sensor (608) abuts against the groove plate (607); The buckle frame (609) is rotatably provided with three shift forks (612), the rod portions of the shift forks (612) are fixedly installed with wear-resistant heads (611), and the wear-resistant heads (611) respectively abut against the end of the connecting column (610) away from the step column (602); The side wall of the buckle frame (609) is fixedly installed with a cover plate stop seat (616), the cover plate stop seat (616) is insertedly assembled with a cover plate (702), the cover plate stop seat (616) is fixedly installed with three guide columns (615), and the same end of the groove plate (607) is provided with guide holes, and the guide columns (615) are respectively insertedly assembled with the guide holes. The buckle frame (609) is fixedly installed with a third position sensor (617) for detecting the intermediate groove plate (607).

6. A banding head for use in packaging according to claim 5, wherein: The buckle frame (609) is fixedly installed with three lead screw modules (12) through a support frame, and the sliding tables of the three lead screw modules (12) are rotatably installed with driving wheels through extension frames, and the driving wheels are respectively located in the fork grooves of the shift forks (612).

7. A banding head for use in packaging according to claim 6, wherein: The vibration assembly (3) comprises a second servo motor (306), a driving pulley (305), a driven pulley (301), a bearing seat (304), a toothed belt (307), a vibrating arm (302) and an eccentric shaft (303). The bearing seat (304) and the second servo motor (306) are fixedly installed on the bottom plate (704), the bearing seat (304) is rotatably provided with the eccentric shaft (303), one end of the eccentric shaft (303) is rotatably installed with the vibrating arm (302) through a sleeve, the other end of the eccentric shaft (303) is fixedly installed with the driven pulley (301), the output shaft of the second servo motor (306) is fixedly installed with the driving pulley (305), the driving pulley (305) and the driven pulley (301) are connected through the toothed belt (307), and the end of the vibrating arm (302) away from the eccentric shaft (303) is rotatably provided with the connecting ring (613).

8. A banding head for use in packaging according to claim 7, wherein: The detection assembly (2) comprises a guide seat (201), a shift piece (206) and a pressing piece (204). The guide seat (201) is fixedly assembled with the buckle frame (609), the inside of the guide seat (201) is provided with a guide channel (202), the inside of the guide seat (201) is provided with a first installation slot and a second installation slot in communication with the guide channel (202), one end of a push piece (206) is rotatably installed in the first installation slot through a torsion shaft, the other end of the push piece (206) is fixedly installed with a first detection rod (205), one end of a pressing piece (204) is rotatably installed in the second installation slot, the other end of the pressing piece (204) is installed with a second detection rod (203), the inside of the second installation slot is installed with a reset spring (209) for jacking the pressing piece (204) through an external thread cap; The side wall of the guide seat (201) is fixedly installed with a fourth position sensor (208) for detecting the first detection rod (205) and a fifth position sensor (207) for detecting the second detection rod (203).

9. A banding head for use in packaging according to claim 8, wherein: The guide assembly (4) comprises a second elastic member (401), a light rod (402), a pressing plate (403) and a retaining ring (404); The side walls of the buckle frame (609), the tightening shell (512) and the guide seat (201) are both installed with the pressing plate (403); the buckle frame (609), the tightening shell (512) and the guide seat (201) are all provided with a through hole, the light rod (402) is inserted into the through hole, the end of the light rod (402) is installed with the retaining ring (404) through a clamping pin, the light rod (402) is sleeved with the second elastic member (401), and the second elastic member (401) abuts between the retaining ring (404) and the pressing plate (403).

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