Folding and pressing structure suitable for vest bags of different specifications

Abstract

The folding and pressing structure is suitable for vest bags of different specifications, and comprises a folding synchronous adjustment mechanism, a folding pressure hook mechanism, a pressure plate pressing mechanism, a pressure plate synchronous adjustment mechanism, a bag ear pressing and folding mechanism, a bag ear pressing and folding driving mechanism, an adjustable pressure rod pressing mechanism, a lower fork mechanism, a fixing mechanism, an adjustable tube straightening plate mechanism and an adjustable material receiving mechanism. The present invention synchronously adjusts the distance between the folding beams according to the sizes of the handles of the different vest bags after folding, thereby controlling the folding positions of the bag head and the bag tail of the vest bag, and the pressure plate synchronous adjustment mechanism can synchronously adjust the distance between the pressure plate positioning structures to adapt to vest bags of different widths, and there is no need to change the size of the pressure plate or manually adjust the distance between the pressure plates. The pressure plate presses the bag body of the vest bag, thereby solving the problem of left-right and front-back deviation and swinging of the vest bag during the folding process, and improving the flatness of the finished product.

Description

Technical Field

[0001] The invention relates to a folding and pressing structure of a vest bag, in particular to a folding and pressing structure suitable for vest bags of different specifications. Background Art

[0002] Vest bags are usually sold in bundles. The bundling process in the workshop is to press the vest bag tightly, fold its bag ears, then fold the bag head and bag tail of the vest bag, and the lower fork mechanism folds half of the vest bag in half to form a handle and send it to the feeding mechanism to complete the entire folding process. Therefore, the quality of the vest bag folding directly affects the subsequent processes, and the folding method of the vest bag is mainly to fold the vest bag body through the vest bag folding structure. The sizes of the handles of vest bags are different, so the distance of the folding structure needs to be adjusted. At present, the distance on one side of the folding mechanism is adjusted first, and then the distance on the other side is adjusted, and the distance between the folding mechanisms cannot be adjusted synchronously. In addition, according to the requirements of different vest bag widths, the sizes of different specifications of pressing plates are generally manually replaced or the movement of the pressing plate mechanism is manually adjusted to adjust the distance between the pressing plate mechanisms so that the pressing plates reach the required position to press the vest bag. This manual adjustment method does not have synchronization, and the degree of automation and accuracy are very low, which seriously affects the packaging quality and efficiency. At the same time, during the folding process of the vest bag, due to the lack of pressing action on the bag ears and the bag body, the vest bag will swing when folded, which affects the subsequent processes. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a folding and pressing structure suitable for vest bags of different specifications.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a folding and pressing structure suitable for vest bags of different specifications, including a folding synchronous adjustment mechanism, a folding hook mechanism, a pressing plate pressing mechanism, a pressing plate synchronous adjustment mechanism, a bag ear pressing and folding mechanism, a bag ear pressing and folding driving mechanism, an adjustable pressure rod pressing mechanism, a lower fork mechanism, a fixing mechanism, an adjustable tube positive plate mechanism and an adjustable material receiving mechanism; the lower fork mechanism and the adjustable pressure rod pressing mechanism are arranged in parallel, and both are connected to the fixing mechanism; the folding hook mechanism is arranged below the lower fork mechanism; the folding synchronous adjustment mechanism is connected to the folding hook mechanism, the folding hook mechanism is arranged on the inner side of the fixing mechanism, and the folding synchronous adjustment mechanism is arranged on the inner side of the fixing mechanism. It is arranged on the outside of the fixing mechanism; the bag ear folding mechanism is arranged above the folding and pressing hook mechanism; the adjustable tube positive plate mechanism is arranged in front of the folding and pressing hook mechanism; the adjustable material receiving mechanism is arranged below the pressing plate clamping mechanism; the pressing plate clamping mechanism is arranged below the folding and pressing hook mechanism and is connected thereto; the pressing plate synchronous adjusting mechanism is connected to the pressing plate clamping mechanism; the bag ear folding driving mechanism is transmission-connected to the bag ear folding mechanism; the folding synchronous adjusting mechanism drives the two folding and pressing hook mechanisms, the pressing plate clamping mechanism and the pressing plate synchronous adjusting mechanism to move in opposite directions; the pressing plate synchronous adjusting mechanism drives the two pressing plate clamping mechanisms to move in opposite directions.

[0005] Preferably, the folding synchronous adjustment mechanism includes a synchronous adjustment mechanism, a folding synchronous sliding mechanism and a synchronous power mechanism; the synchronous adjustment mechanism is slidably connected to the folding synchronous sliding mechanism, and is transmission-connected to the synchronous power mechanism; the synchronous adjustment mechanism is divided into two groups, namely a first synchronous adjustment mechanism and a second synchronous adjustment mechanism; the first synchronous adjustment mechanism includes a positive-tooth ball screw, a negative-tooth ball screw, a coupling, a positive-tooth connecting plate, a negative-tooth connecting plate and a synchronous moving block; the synchronous moving block is arranged on the outside of the fixing mechanism; the first synchronous adjustment mechanism is connected to the synchronous moving block through the positive-tooth connecting plate and the negative-tooth connecting plate respectively; one end of the positive-tooth ball screw is connected to the synchronous power mechanism, and the other end is connected to the coupling through the positive-tooth connecting plate, and the negative-tooth ball screw is connected to the coupling through the negative-tooth connecting plate The orthogonal ball screw and the anti-thread ball screw are fixedly connected through a coupling; the second synchronous adjustment mechanism has the same structure as the first synchronous adjustment mechanism and is arranged on the other side of the folding pressure hook mechanism; a screw support plate is provided at the connection between the orthogonal ball screw and the synchronous power mechanism; the folding synchronous sliding mechanism includes a folding slider and a folding slide rail; the folding slider is fixedly connected to the synchronous moving block; the folding slider and the folding slide rail are slidably connected; the synchronous power mechanism includes a synchronous motor, a motor driving wheel, a motor driven wheel and a synchronous drive belt; the synchronous motor is connected to the motor driving wheel; the motor driving wheel is connected to the motor driven wheel through a synchronous drive belt; the motor driven wheel is connected to the orthogonal ball screw; a folding synchronous adjustment mechanism with the same structure is provided on the other side of the fixing mechanism.

[0006] Preferably, the folding and hook pressing mechanism comprises a folding mechanism, a hook pressing mechanism and a folding driving mechanism. The folding mechanism is connected to the folding driving mechanism by transmission; the pressing hook mechanism is connected to the folding mechanism; the folding mechanism comprises a folding beam, a front flap, a rear flap, a flip joint, a flip round bar and a flip beam; the two ends of the flip beam are respectively fixed to the two sides of the fixing mechanism through a flip joint, the front flap and the rear flap are respectively fixed on a flip beam, and the front flap and the rear flap are horizontally arranged; the flip joint is connected to the folding driving mechanism, and the flip round bar and the folding beam are both connected to the fixing mechanism; the pressing hook mechanism comprises a pressing hook cylinder, a pressing hook and a pressing hook transmission mechanism; the pressing hook is connected to the pressing hook cylinder; the pressing hook transmission mechanism comprises a rack, a spur gear, a first bevel gear, a second bevel gear and a pressing hook rotating shaft; one end of the rack is connected to the cylinder shaft of the pressing hook cylinder, the rack is meshed with the spur gear, and the spur gear is fixedly connected to the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is fixedly connected to the pressing hook rotating shaft, and the pressing hook is fixed to one end of the pressing hook rotating shaft. The folding drive mechanism is divided into two groups, namely the first folding drive mechanism and the second folding drive mechanism; the first folding drive mechanism includes a flip adjustable cylinder, a first gear, a first rotating shaft, a second gear, a second rotating shaft, a flip fixed plate and a flip limit block; the second rotating shaft is connected to the flip joint; the cylinder shaft of the flip adjustable cylinder is connected to the first gear; the first gear is fixedly connected to the first rotating shaft, the second gear is fixedly connected to the second rotating shaft, the second gear is meshed with the first gear, and the flip limit block is respectively arranged on the left and right sides of the first gear; a retaining spring is provided at the lower ends of the first rotating shaft and the second rotating shaft; the structure of the second folding drive mechanism is exactly the same as that of the first folding drive mechanism, and the second folding drive mechanism is connected to the flip joint at the rear flip plate; a flip bearing is provided on the outer side of the first rotating shaft and the second rotating shaft, and the flip bearing is installed on the flip bearing seat; the flip bearing seat is fixed on the flip fixed plate; a flip drive mechanism with the same structure is provided on the other side of the fixing mechanism.

[0007] Preferably, the pressure plate clamping mechanism includes multiple groups of pressure plate positioning structures and pressure plate driving structures; the pressure plate synchronous adjustment mechanism includes a base plate, a rectangular belt, a driving wheel and multiple driven wheels; the driving wheel and multiple driven wheels are arranged on the base plate; the rectangular belt is sleeved on the outer edges of the driving wheel and multiple driven wheels; the multiple groups of pressure plate positioning structures are fixed at intervals at the upper and lower ends of the rectangular belt; the pressure plate driving structure is connected to the driving wheel; and a pressure plate slide rail is provided on the base plate. The multiple groups of pressure plate positioning structures are each provided with a pressure plate slider; the pressure plate slider is slidably connected to the pressure plate slide rail. There are three driven wheels, namely the first driven wheel, the second driven wheel and the third driven wheel; the driving wheel and the three driven wheels are respectively arranged on the four corners of the rectangular belt.

[0008] Preferably, the multiple groups of pressure plate positioning structures are two groups, namely the first group of pressure plate positioning structures and the second group of pressure plate positioning structures; the first group of pressure plate positioning structures includes the first pressure plate positioning structure and the second pressure plate positioning structure; the first pressure plate positioning structure includes a positioning cylinder, an L-shaped plate and a positioning pressure plate; one end of the L-shaped plate is connected to the positioning cylinder, and the other end is connected to the positioning pressure plate; the positioning cylinder is fixedly connected to one side of the rectangular belt; the second pressure plate positioning structure has the same structure as the first pressure plate positioning structure, and the positioning cylinder of the second pressure plate positioning structure is fixedly connected to the other side of the rectangular belt; the second group of pressure plate positioning structures has exactly the same structure as the first group of pressure plate positioning structures.

[0009] Preferably, the fixing mechanism includes side panels, a front crossbeam and an intermediate crossbeam; the intermediate crossbeam is arranged behind the front crossbeam, and the two are arranged in parallel; the two ends of the front crossbeam and the intermediate crossbeam are respectively fixedly connected to a side panel; the front crossbeam is connected to the adjustable pressure rod clamping mechanism, the intermediate crossbeam is connected to the lower fork mechanism, the outer side of the side panel is connected to the folding synchronous adjustment mechanism, and the inner side is provided with a folding pressure hook mechanism. The lower fork mechanism includes a lower fork, a lower fork fixing beam and a lower fork cylinder; the lower fork cylinder is connected to the fixing mechanism, and its cylinder shaft is connected to the lower fork fixing beam; the lower fork is connected to the lower fork fixing beam.

[0010] Preferably, the adjustable pressure rod clamping mechanism includes a front movable beam, a downward pressure cylinder, a pressure rod adjustable seat and a pressure rod; the downward pressure cylinder is connected to the fixing mechanism, and its cylinder shaft is connected to the front movable beam; the pressure rod adjustable seat is connected to the front movable beam, and the pressure rod is connected to the pressure rod adjustable seat; the downward pressure cylinder is fixed on the front cross beam, and its cylinder shaft passes through the front cross beam and is connected to the front movable beam; a rubber head is fixed to the lower end of the pressure rod.

[0011] Preferably, the bag ear folding mechanism includes a bag ear sliding folding mechanism, a bag ear flattening mechanism, a bag ear lifting mechanism and a bag ear sliding mechanism; the bag ear sliding folding mechanism includes an upper fork and a lower fork; the upper fork, the lower fork and the bag ear flattening mechanism are arranged in parallel, and the bag ear flattening mechanism is located below the lower fork; the upper fork and the lower fork are both provided with paddles; the paddles of the upper fork include a first paddle and a second paddle, and the paddles of the lower fork include a third paddle and a fourth paddle; the bag ear flattening mechanism includes a gasket, a bag ear pressing plate, a bag ear pressing plate crossbeam and a bag ear pressing plate synchronous adjustment mechanism; the bag ear pressing plate is connected to the bag ear pressing plate synchronous adjustment mechanism, and the bag ear pressing plate synchronous adjustment mechanism is exactly the same in structure as the pressing plate synchronous adjustment mechanism; a gasket is provided above the bag ear pressing plate crossbeam, and the bag ear pressing plate crossbeam is connected to the bag ear pressing plate ; The bag ear lifting mechanism includes a frame fixing plate, a bag ear lifting beam and a bag ear lifting cylinder; the bag ear lifting cylinder is fixed on the frame fixing plate, and its cylinder shaft is connected to the bag ear lifting beam; the bag ear sliding and folding mechanism and the bag ear flattening mechanism are respectively connected to the bag ear lifting beam; the bag ear sliding mechanism includes a bag ear slide rail, a bag ear slide rail slide seat and a bag ear sliding cylinder; the bag ear slide rail slide seat is connected to the bag ear slide rail, the cylinder shaft of the bag ear sliding cylinder is connected to the bag ear slide rail slide seat, and the number of bag ear slide rails, bag ear slide rail slide seats and bag ear sliding cylinders is greater than one, and the bag ear slide rail slide seat is respectively connected to the upper fork and the lower fork; the bag ear folding drive mechanism includes a bag ear drive motor and a bag ear drive belt; the bag ear drive motor is transmission-connected to the bag ear drive belt, and the bag ear drive belt is connected to the bag ear folding mechanism.

[0012] Preferably, the adjustable material receiving mechanism includes a material receiving bottom plate, a material receiving limit lifting platform, a material receiving pressing cylinder, a material receiving slide rail, a material receiving slider, a material receiving hand, a material receiving hand fixed plate, a lifting cylinder, a material receiving lifting cylinder, a material receiving sliding mechanism and a material receiving driving mechanism; the material receiving pressing cylinder is located on both sides of the material receiving bottom plate, the material receiving limit lifting platform is fixed in the middle of the material receiving bottom plate, the material receiving slide rail is arranged on the material receiving bottom plate, the material receiving hand is fixed on the material receiving hand fixed plate, the material receiving hand fixed plate is fixed on the material receiving slider and is connected to the material receiving pressing cylinder The cylinder is connected, the lifting cylinder is connected to the material receiving limit lifting platform, and the material receiving lifting cylinder is connected to the material receiving bottom plate; the material receiving drive mechanism is transmission-connected to the material receiving bottom plate; the material receiving limit lifting platform is provided with a material receiving groove; the material receiving sliding mechanism includes a sliding fixed seat, a sliding rod and a sliding linear bearing seat; the sliding linear bearing seat is connected to the adjustable material receiving mechanism; each end of the sliding rod is connected to a sliding fixed seat, the sliding fixed seats are respectively arranged on both sides of the fixing mechanism, and the sliding linear bearing seat is sleeved on the sliding rod.

[0013] Preferably, the adjustable tube positive plate mechanism includes a tube positive plate, a tube positive fixed plate, a tube positive plate bottom plate, a tube positive plate slide rail, a tube positive plate slider, a tube positive plate synchronous adjustment mechanism, a tube positive plate sliding mechanism and a tube positive plate driving mechanism; the tube positive plate synchronous adjustment mechanism and the tube positive plate slide rail are arranged on the tube positive plate bottom plate, the tube positive plate slider is connected to the tube positive plate synchronous adjustment mechanism, the tube positive plate slide rail is slidably connected to the tube positive plate slider, the tube positive plate is connected to the tube positive plate synchronous adjustment mechanism, and the tube positive fixed plate is connected to the tube positive plate slider; the tube positive plate sliding mechanism is arranged on both sides of the tube positive plate bottom plate; the tube positive plate driving mechanism is transmission connected to the tube positive plate bottom plate; the tube positive plate synchronous adjustment mechanism and the pressure plate synchronous adjustment mechanism have exactly the same structure.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention controls the distance between the folding beams according to the sizes of the different vest bag handles after folding, thereby controlling the folding positions of the bag head and the bag ears of the vest bag, and the pressing plate synchronous adjustment mechanism can synchronously adjust the distance between the pressing plate positioning structures to adapt to vest bags of different widths, without having to change the size of the pressing plate or manually adjust the distance between the pressing plates, the pressing plate presses the bag body of the vest bag, thereby solving the problem of left-right and front-back deviation and swinging of the vest bag during the folding process, and improving the quality of the finished product. Flatness, and a pressure rod presses the folded part of the front end of the vest bag to prevent the vest bag from rebounding after folding, and the position of the pressure rod can be adjusted through the adjustable seat of the pressure rod to meet the needs of pressing the vest bag at different positions; at the same time, the material receiving limit lifting platform of the adjustable material receiving mechanism can ensure that the vest bag does not deviate and the folding position is consistent, and at the same time it will press the vest bag, making the vest bag compact and not loose, preparing for subsequent bundling work, ensuring the work efficiency and accuracy of the workshop, and the structure of each mechanism is simpler than the equipment currently on the market, saving machinery costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present invention.

[0016] Figure 2 yes Figure 1 Section view at AA.

[0017] Figure 3 It is a structural schematic diagram of the folding synchronous adjustment mechanism and the folding drive mechanism of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the pressing plate clamping mechanism and the pressing plate synchronous adjustment mechanism of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the bag ear pressing and folding mechanism of the present invention.

[0020] Figure 6This is a schematic diagram of the structure of the synchronous adjustment mechanism of the tube plate of the present invention.

[0021] Figure 7 It is a side schematic diagram of the hook pressing mechanism of the present invention.

[0022] Figure 8 It is a structural schematic diagram of the hook pressing mechanism of the present invention.

[0023] Fig. 9 It is a structural schematic diagram of the folding mechanism of the present invention.

[0024] Fig.10 It is a working principle diagram of the adjustable material receiving mechanism of the present invention.

[0025] Fig.11 It is a structural schematic diagram of the adjustable material receiving mechanism of the present invention.

[0026] Fig.12 It is a working principle diagram of the synchronous adjustment mechanism of the present invention.

[0027] Fig.13 It is a structural schematic diagram of the adjustable tube positive plate mechanism of the present invention.

[0028] In the figure: 1-folding synchronous adjustment mechanism; 2-folding pressure hook mechanism; 3-lower fork mechanism; 4-fixing mechanism; 5-pressing plate clamping mechanism; 6-adjustable pressure rod clamping mechanism; 7-adjustable material receiving mechanism; 8-bag ear pressing mechanism; 9-bag ear pressing driving mechanism; 10-pressing plate synchronous adjustment mechanism; 11-vest bag; 12-adjustable tube positive plate mechanism; 110-positive ball screw; 111-negative ball screw; 112-coupling; 113-synchronous moving block; 114-positive tooth connecting plate; 115-negative tooth connecting plate; 116-screw support plate; 117-folding slider; 118-folding slide rail; 119-synchronous motor; 120-motor driving wheel; 121-motor driven wheel; 122-synchronous driving belt; 210-folding beam; 211-front flap; 212-rear flap; 213-turning joint; 214-turning beam; 215-turning round bar; 220-pressing hook cylinder; 221-pressing hook; 222-rack; 223-spur gear; 224-first bevel gear; 225-second bevel gear; 226-pressing hook shaft; 230-flip adjustable cylinder; 231-first gear; 232-first shaft; 233-second gear; 234-second shaft; 235-flip fixed plate; 236-flip limit block; 237-circlip; 238-flip bearing; 239-flip bearing seat; 310-lower fork; 311-lower fork fixed beam; 312-lower fork cylinder; 410-side plate; 411-front beam; 412-middle beam; 510-bottom plate; 511-rectangular belt; 512-driving wheel; 513-first driven wheel; 514-second driven wheel; 515-third driven wheel; 516-pressing plate slider; 517-pressing plate slide rail; 5 20-positioning cylinder; 521-L-type plate; 522-positioning pressure plate; 523-pressure plate driving structure; 610-front movable beam; 611-downward pressure cylinder; 612-pressure rod adjustable seat; 613-pressure rod; 614-rubber head; 710-material receiving bottom plate; 711-material receiving limit lifting platform; 712-material receiving pressing cylinder; 713-material receiving slide rail; 714-material receiving slide block; 715-material receiving hand; 716-material receiving hand fixed plate; 717-lifting cylinder; 718-material receiving lifting cylinder; 719-sliding fixed seat; 720-slide rod; 721-sliding linear bearing seat; 722-material receiving drive mechanism; 810-frame fixed plate; 811-bag ear lifting beam; 812-bag ear slide rail slide seat; 813-bag ear sliding cylinder; 814-upper fork; 815-lower fork; 816-bag ear slide rail; 817-gasket; 818-bag ear pressure plate; 819-bag ear pressure plate beam; 820-bag ear lifting cylinder; 821-first paddle; 822-second paddle; 823-third paddle; 824-fourth paddle; 910-tube positive plate; 911-tube positive fixed plate; 912-tube positive plate slider; 913-tube positive plate slide rail; 914-tube positive plate sliding mechanism; 915-tube positive plate bottom plate; 916-tube positive plate driving mechanism. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 13As shown: a folding and pressing structure suitable for vest bags 11 of different specifications, including a folding synchronous adjustment mechanism 1, a folding hook mechanism 2, a pressing plate pressing mechanism 5, a pressing plate synchronous adjustment mechanism 10, a bag ear pressing and folding mechanism 8, a bag ear pressing and folding driving mechanism 9, an adjustable pressing rod pressing mechanism 6, a lower fork mechanism 3, a fixing mechanism 4, an adjustable tube positive plate mechanism and an adjustable material receiving mechanism 7; the lower fork mechanism 3 and the adjustable pressing rod pressing mechanism 6 are arranged in parallel, and both are connected to the fixing mechanism 4; the folding hook mechanism 2 is arranged below the lower fork mechanism 3; the folding synchronous adjustment mechanism 1 is connected to the folding hook mechanism 2, the folding hook mechanism 2 is arranged on the inner side of the fixing mechanism 4, and the folding synchronous adjustment mechanism 1 is arranged on the fixing mechanism 4 the outside of the bag ear folding mechanism 8 is arranged above the folding hook mechanism 2; the adjustable tube positive plate mechanism is arranged in front of the folding hook mechanism 2; the adjustable material receiving mechanism 7 is arranged below the pressing plate clamping mechanism 5; the pressing plate clamping mechanism 5 is arranged below the folding hook mechanism 2 and connected thereto; the pressing plate synchronous adjustment mechanism 10 is connected to the pressing plate clamping mechanism 5; the bag ear folding drive mechanism 9 is transmission-connected to the bag ear folding mechanism 8; the folding synchronous adjustment mechanism 1 drives the two folding hook mechanisms 2, the pressing plate clamping mechanism 5 and the pressing plate synchronous adjustment mechanism 10 to move in opposite directions; the pressing plate synchronous adjustment mechanism 10 drives the two pressing plate clamping mechanisms 5 to move in opposite directions.The folding synchronous adjustment mechanism 1 includes a synchronous adjustment mechanism, a folding synchronous sliding mechanism and a synchronous power mechanism; the synchronous adjustment mechanism is slidably connected to the folding synchronous sliding mechanism and is transmission-connected to the synchronous power mechanism; the synchronous adjustment mechanism is divided into two groups, namely the first synchronous adjustment mechanism and the second synchronous adjustment mechanism; the first synchronous adjustment mechanism includes a positive ball screw 110, a negative ball screw 111, a coupling 112, a positive connecting plate 114, a negative connecting plate 115 and a synchronous moving block 113; the synchronous moving block 113 is arranged on the outside of the fixing mechanism 4; the first synchronous adjustment mechanism is connected to the synchronous moving block 113 through the positive connecting plate 114 and the negative connecting plate 115 respectively; one end of the positive ball screw 110 is connected to the synchronous power mechanism, and the other end passes through the positive connecting plate 114 to be connected to the coupling 112, the negative ball screw 111 passes through the negative connecting plate 115 to be connected to the coupling 112, the positive ball screw 110 and the negative connecting plate 115 are connected to the coupling 112, and the positive ball screw 110 and the negative connecting plate 115 are connected to the coupling 112. The tooth ball screw 111 is fixedly connected through a coupling 112; the second synchronous adjustment mechanism is completely identical in structure to the first synchronous adjustment mechanism and is arranged on the other side of the folding hook pressing mechanism 2; a screw support plate 116 is provided at the connection between the orthogonal ball screw 110 and the synchronous power mechanism; the folding synchronous sliding mechanism includes a folding slider 117 and a folding slide rail 118; the folding slider 117 is fixedly connected to the synchronous moving block 113; the folding slider 117 and the folding slide rail 118 are slidably connected; the synchronous power mechanism includes a synchronous motor 119, a motor driving wheel 120, a motor driven wheel 121 and a synchronous driving belt 122; the synchronous motor 119 is connected to the motor driving wheel 120; the motor driving wheel 120 is connected to the motor driven wheel 121 through a synchronous driving belt 122; the motor driven wheel 121 is connected to the orthogonal ball screw 110; the other side of the fixing mechanism 4 is provided with a folding synchronous adjustment mechanism 1 with the same structure. The folding hook pressing mechanism 2 includes a folding mechanism, a hook pressing mechanism and a folding driving mechanism.The folding mechanism is connected to the folding drive mechanism by transmission; the pressing hook mechanism is connected to the folding mechanism; the folding mechanism includes a folding beam 210, a front flap 211, a rear flap 212, a flip joint 213, a flip round bar 215 and a flip beam 214; the two ends of the flip beam 214 are respectively fixed to the two sides of the fixing mechanism 4 through the flip joint 213, the front flap 211 and the rear flap 212 are respectively fixed on a flip beam 214, and the front flap 211 and the rear flap 212 are horizontally arranged; the flip joint 213 is connected to the folding drive mechanism, and the flip round bar 215 and the folding beam 210 are both connected to the fixing mechanism 4; the pressing hook mechanism includes a pressing hook Cylinder 220, press hook 221 and press hook transmission mechanism; the press hook 221 is connected to the press hook cylinder 220; the press hook transmission mechanism includes a rack 222, a spur gear 223, a first bevel gear 224, a second bevel gear 225 and a press hook rotating shaft 226; one end of the rack 222 is connected to the cylinder shaft of the press hook cylinder 220, the rack 222 is meshed with the spur gear 223, and the spur gear is fixedly connected to the first bevel gear 224 of 223, the first bevel gear 224 is meshed with the second bevel gear 225, the second bevel gear 225 is fixedly connected to the press hook rotating shaft 226, and the press hook 221 is fixed to one end of the press hook rotating shaft 226. The folding drive mechanism is divided into two groups, namely the first folding drive mechanism and the second folding drive mechanism; the first folding drive mechanism includes a flip adjustable cylinder 230, a first gear 231, a first rotating shaft 232, a second gear 233, a second rotating shaft 234, a flip fixed plate 235 and a flip limit block 236; the second rotating shaft 232 is connected to the flip joint 213; the cylinder shaft of the flip adjustable cylinder 230 is connected to the first gear 231; the first gear 231 is fixedly connected to the first rotating shaft 232, the second gear 233 is fixedly connected to the second rotating shaft 234, and the second gear 233 is fixedly connected to the first gear 23 1 is engaged, and the flip limit blocks 236 are respectively arranged on the left and right sides of the first gear 231; the lower ends of the first rotating shaft 232 and the second rotating shaft 234 are provided with a retaining spring 237; the structure of the second folding driving mechanism is exactly the same as that of the first folding driving mechanism, and the second folding driving mechanism is connected to the flip joint 213 at the rear flip plate 212; the outer sides of the first rotating shaft 232 and the second rotating shaft 234 are provided with a flip bearing 238, and the flip bearing 238 is installed on a flip bearing seat 239; the flip bearing seat 239 is fixed on the flip fixing plate 235; the other side of the fixing mechanism 4 is provided with a flip driving mechanism with the same structure.The pressing plate clamping mechanism 5 includes multiple sets of pressing plate positioning structures and pressing plate driving structures; the pressing plate synchronous adjustment mechanism 10 includes a bottom plate 510, a rectangular belt 511, a driving wheel 512 and multiple driven wheels; the driving wheel 512 and multiple driven wheels are arranged on the bottom plate 510; the rectangular belt 511 is sleeved on the outer edges of the driving wheel 512 and multiple driven wheels; the multiple sets of pressing plate positioning structures are fixed at intervals on the upper and lower ends of the rectangular belt 511; the pressing plate driving structure is connected to the driving wheel 512; the bottom plate 510 is provided with a pressing plate slide 517. The multiple sets of pressing plate positioning structures are all provided with a pressing plate slider 516; the pressing plate slider 516 is slidably connected with the pressing plate slide 517. There are three driven wheels, namely the first driven wheel 513, the second driven wheel 514 and the third driven wheel 515; the driving wheel 512 and the three driven wheels are respectively arranged on the four corners of the rectangular belt 511. The multiple groups of pressure plate positioning structures are divided into two groups, namely the first group of pressure plate positioning structures and the second group of pressure plate positioning structures; the first group of pressure plate positioning structures includes the first pressure plate positioning structure and the second pressure plate positioning structure; the first pressure plate positioning structure includes a positioning cylinder 520, an L-shaped plate 521 and a positioning pressure plate 522; one end of the L-shaped plate 521 is connected to the positioning cylinder 520, and the other end is connected to the positioning pressure plate 522; the positioning cylinder 520 is fixedly connected to one side of the rectangular belt 511; the second pressure plate positioning structure has the same structure as the first pressure plate positioning structure, and the positioning cylinder of the second pressure plate positioning structure is fixedly connected to the other side of the rectangular belt 511; the second group of pressure plate positioning structures has exactly the same structure as the first group of pressure plate positioning structures. The fixing mechanism 4 includes a side plate 410, a front crossbeam 411 and an intermediate crossbeam 412; the intermediate crossbeam 412 is arranged behind the front crossbeam 411, and the two are arranged in parallel; the two ends of the front crossbeam 411 and the intermediate crossbeam 412 are respectively fixedly connected to a side plate 410; the front crossbeam 411 is connected to the adjustable pressure rod clamping mechanism 6, the intermediate crossbeam 412 is connected to the lower fork mechanism 3, the outer side of the side plate 410 is connected to the folding synchronous adjustment mechanism 1, and the inner side is provided with a folding pressure hook mechanism 2. The lower fork mechanism 3 includes a lower fork 310, a lower fork fixed beam 311 and a lower fork cylinder 312; the lower fork cylinder 312 is connected to the fixing mechanism 4, and its cylinder shaft is connected to the lower fork fixed beam 311; the lower fork 310 is connected to the lower fork fixed beam 311. The adjustable pressure rod clamping mechanism 6 includes a front movable beam 610, a downward pressure cylinder 611, a pressure rod adjustable seat 612 and a pressure rod 613; the downward pressure cylinder 611 is connected to the fixing mechanism 4, and its cylinder shaft is connected to the front movable beam 610; the pressure rod adjustable seat 612 is connected to the front movable beam 610, and the pressure rod 613 is connected to the pressure rod adjustable seat 612; the downward pressure cylinder 611 is fixed on the front cross beam 411, and its cylinder shaft passes through the front cross beam 411 and is connected to the front movable beam 610; a rubber head 614 is fixed to the lower end of the pressure rod 613.The bag ear folding mechanism 8 includes a bag ear sliding folding mechanism, a bag ear flattening mechanism, a bag ear lifting mechanism and a bag ear sliding mechanism; the bag ear sliding folding mechanism includes an upper fork 814 and a lower fork 815; the upper fork 814, the lower fork 815 and the bag ear flattening mechanism are arranged in parallel, and the bag ear flattening mechanism is located below the lower fork 815; the upper fork 814 and the lower fork 815 are both provided with paddles; the paddles of the upper fork 814 include a first paddle 821 and a second paddle 822, and the paddles of the lower fork 815 are arranged on the upper fork 814. The paddles of the fork include a third paddle 823 and a fourth paddle 824; the bag ear flattening mechanism includes a gasket 817, a bag ear pressing plate 818, a bag ear pressing plate crossbeam 819 and a bag ear pressing plate synchronous adjustment mechanism 10; the bag ear pressing plate 818 is connected to the bag ear pressing plate synchronous adjustment mechanism 10, and the bag ear pressing plate synchronous adjustment mechanism 10 and the pressing plate synchronous adjustment mechanism 10 are completely the same in structure; a gasket 817 is provided above the bag ear pressing plate crossbeam 819, and the bag ear pressing plate crossbeam 819 is connected to the bag ear pressing plate 818 below The bag ear lifting mechanism includes a frame fixing plate 810, a bag ear lifting beam 811 and a bag ear lifting cylinder 820; the bag ear lifting cylinder 820 is fixed on the frame fixing plate 810, and its cylinder shaft is connected to the bag ear lifting beam 811; the bag ear sliding folding mechanism and the bag ear flattening mechanism are respectively connected to the bag ear lifting beam 811; the bag ear sliding mechanism includes a bag ear slide rail 816, a bag ear slide rail slide seat 812 and a bag ear sliding cylinder 813; the bag ear slide rail slide seat 812 and the bag ear sliding cylinder 813 The bag ear slide rail 816 is connected, the cylinder shaft of the bag ear sliding cylinder 813 is connected to the bag ear slide rail slide seat 812, and the number of the bag ear slide rail 816, the bag ear slide rail slide seat 812 and the bag ear sliding cylinder 813 is greater than one, and the bag ear slide rail slide seat 812 is respectively connected to the upper fork 814 and the lower fork 815; the bag ear folding drive mechanism 9 includes a bag ear drive motor and a bag ear drive belt; the bag ear drive motor is connected to the bag ear drive belt in driving connection, and the bag ear drive belt is connected to the bag ear folding mechanism 8.The adjustable material receiving mechanism 7 includes a material receiving bottom plate 710, a material receiving position limiting lifting platform 711, a material receiving pressing cylinder 712, a material receiving slide rail 713, a material receiving slider 714, a material receiving hand 715, a material receiving hand fixing plate 716, a lifting cylinder 717, a material receiving lifting cylinder 718, a material receiving sliding mechanism and a material receiving driving mechanism 722; the material receiving pressing cylinder 712 is located on both sides of the material receiving bottom plate 710, the material receiving position limiting lifting platform 711 is fixed in the middle of the material receiving bottom plate 710, the material receiving slide rail 713 is arranged on the material receiving bottom plate 710, the material receiving hand 715 is fixed on the material receiving hand fixing plate 716, the material receiving hand fixing plate 716 is fixed on the material receiving slider 714 and is connected to the material receiving The clamping cylinder 718 is connected, the lifting cylinder 717 is connected to the material receiving limit lifting platform 711, and the material receiving lifting cylinder 718 is connected to the material receiving bottom plate 710; the material receiving drive mechanism 722 is transmission-connected to the material receiving bottom plate 710; the material receiving limit lifting platform 711 is provided with a material receiving groove; the material receiving sliding mechanism includes a sliding fixed seat 719, a sliding rod 720 and a sliding linear bearing seat 721; the sliding linear bearing seat 721 is connected to the adjustable material receiving mechanism 7; the two ends of the sliding rod 720 are respectively connected to a sliding fixed seat 719, and the sliding fixed seats 719 are respectively arranged on both sides of the fixing mechanism 4, and the sliding linear bearing seat 721 is sleeved on the sliding rod 720. The adjustable tube positive plate mechanism includes a tube positive plate 910, a tube positive fixed plate 911, a tube positive plate bottom plate 915, a tube positive plate slide rail 913, a tube positive plate slider 912, a tube positive plate synchronous adjustment mechanism, a tube positive plate sliding mechanism 914 and a tube positive plate driving mechanism 916; the tube positive plate synchronous adjustment mechanism and the tube positive plate slide rail 913 are arranged on the tube positive plate bottom plate 915, the tube positive plate slider 912 is connected to the tube positive plate synchronous adjustment mechanism, the tube positive plate slide rail 913 is slidably connected to the tube positive plate slider 912, the tube positive plate 910 is connected to the tube positive plate synchronous adjustment mechanism, the tube positive fixed plate 911 is connected to the tube positive plate slider 912; the tube positive plate sliding mechanism 914 is arranged on both sides of the tube positive plate bottom plate 915; the tube positive plate driving mechanism 916 is transmission-connected to the tube positive plate bottom plate 915; the tube positive plate synchronous adjustment mechanism and the pressure plate synchronous adjustment mechanism 10 have the same structure.

[0031] The working principle of the present invention is as follows: when working, the vest bag is sent to the folding mechanism through the adjustable tube positive plate mechanism, and while the positioning pressing plate presses the vest bag, the bag ear pressing and folding driving mechanism drives the bag ear pressing and folding mechanism to the top of the bag ear of the vest bag, the first and second paddles of the upper fork slide from left to right to fold the left bag ear, the third and fourth paddles of the lower fork slide from right to left to fold the right bag ear, and then the pressing hook flips upward to press the folded bag ear, and then the bag ear pressing and folding mechanism is reset. The folding drive mechanism will drive the front flap and the rear flap of the folding mechanism to fold along the position where the positioning pressure plate is pressed. After the front flap folds the bag head, the pressure rod will move downward to press the bag head of the vest bag, and the front flap and the pressure hook will be reset. Then the rear flap will fold the bag tail. While the lower fork moves downward, the rear flap and the pressure plate pressing mechanism will be reset. The lower fork will be folded along the middle of the vest bag and sent to the adjustable material receiving mechanism. The adjustable material receiving mechanism will then transport the folded vest bag away, completing the entire folding and pressing process. When the specifications of the folded vest bag handle need to be changed, it is adjusted by changing the relative distance between the folding mechanisms, controlling the rotation of the synchronous motor to drive the synchronous wheel to operate. When the synchronous motor rotates forward, the positive and negative ball screws connected to the coupling will rotate, and the positive and negative connecting plates will respectively drive the folding beams to move synchronously. At this time, the distance between the folding beams will become larger, which is suitable for vest bags with large handles. When the synchronous motor rotates reversely, the distance between the folding beams will become smaller, which is suitable for vest bags with small handles, such as Fig.12 As shown, the distance between the folding beams is B, and the size of the handle after folding is B / 2; when replacing vest bags of different widths, the pressing plate synchronous adjustment mechanism, the bag ear pressing plate synchronous adjustment mechanism and the tube main plate synchronous adjustment mechanism will be adjusted synchronously, and the distance between each mechanism will be adjusted synchronously according to different widths; the pressing plate synchronous adjustment mechanism is to synchronously adjust the distance between the pressing plate positioning structures, the positioning cylinder will push the L-shaped plate, and the pressing plate driving structure will adjust the distance between the pressing plate positioning structures to make them move synchronously to adapt to the width of the vest bag, and then the positioning cylinder will retract the L-shaped plate to press the vest bag; the working principle and structure of the bag ear pressing plate synchronous adjustment mechanism and the tube main plate synchronous adjustment mechanism are consistent with the pressing plate synchronous adjustment mechanism.

Claims

1. The folding and pressing structure is suitable for vest bags of different specifications, and its characteristics are: It includes a folding synchronous adjustment mechanism, a folding hook mechanism, a pressing plate clamping mechanism, a pressing plate synchronous adjustment mechanism, a bag ear folding mechanism, a bag ear folding driving mechanism, an adjustable pressing rod clamping mechanism, a lower fork mechanism, a fixing mechanism, an adjustable tube positive plate mechanism and an adjustable material receiving mechanism; the lower fork mechanism and the adjustable pressing rod clamping mechanism are arranged in parallel, and both are connected to the fixing mechanism; the folding pressing hook mechanism is arranged below the lower fork mechanism; the folding synchronous adjustment mechanism is connected to the folding pressing hook mechanism, the folding pressing hook mechanism is arranged on the inner side of the fixing mechanism, and the folding synchronous adjustment mechanism is arranged on the outer side of the fixing mechanism; the bag ear folding mechanism is arranged above the folding pressing hook mechanism; the adjustable tube positive plate mechanism is arranged in front of the folding pressing hook mechanism; the adjustable material receiving mechanism is arranged below the pressing plate clamping mechanism; the pressing plate clamping mechanism is arranged below the folding pressing hook mechanism and is connected thereto; the pressing plate synchronous adjustment mechanism is connected to the pressing plate clamping mechanism; the bag ear folding driving mechanism is transmission-connected to the bag ear folding mechanism; The folding synchronous adjustment mechanism includes a synchronous adjustment mechanism, a folding synchronous sliding mechanism and a synchronous power mechanism; the synchronous adjustment mechanism is slidably connected to the folding synchronous sliding mechanism and is transmission-connected to the synchronous power mechanism; the synchronous adjustment mechanism is divided into two groups, namely the first synchronous adjustment mechanism and the second synchronous adjustment mechanism; the first synchronous adjustment mechanism includes a positive-tooth ball screw, a negative-tooth ball screw, a coupling, a positive-tooth connecting plate, a negative-tooth connecting plate and a synchronous moving block; the synchronous moving block is arranged on the outside of the fixing mechanism; the first synchronous adjustment mechanism is connected to the synchronous moving block through the positive-tooth connecting plate and the negative-tooth connecting plate respectively; one end of the positive-tooth ball screw is connected to the synchronous power mechanism, and the other end is connected to the coupling through the positive-tooth connecting plate, the negative-tooth ball screw is connected to the coupling through the negative-tooth connecting plate, The tooth ball screw and the reverse tooth ball screw are fixedly connected through a coupling; the second synchronous adjustment mechanism has the same structure as the first synchronous adjustment mechanism and is arranged on the other side of the folding pressure hook mechanism; a screw support plate is provided at the connection between the orthogonal ball screw and the synchronous power mechanism; the folding synchronous sliding mechanism includes a folding slider and a folding slide rail; the folding slider is fixedly connected to the synchronous moving block; the folding slider and the folding slide rail are slidably connected; the synchronous power mechanism includes a synchronous motor, a motor driving wheel, a motor driven wheel and a synchronous drive belt; the synchronous motor is connected to the motor driving wheel; the motor driving wheel is connected to the motor driven wheel through a synchronous drive belt; the motor driven wheel is connected to the orthogonal ball screw; a folding synchronous adjustment mechanism with the same structure is provided on the other side of the fixing mechanism; The folding hook pressing mechanism comprises a folding mechanism, a hook pressing mechanism and a folding driving mechanism, and the folding mechanism is transmission-connected with the folding driving mechanism; the hook pressing mechanism is connected to the folding mechanism; the folding mechanism comprises a folding beam, a front flap, a rear flap, a flip joint, a flip round bar and a flip beam; the two ends of the flip beam are respectively fixed to the two sides of the fixing mechanism through a flip joint, the front flap and the rear flap are respectively fixed on a flip beam, and the front flap and the rear flap are horizontally arranged; the flip joint is connected to the folding driving mechanism, and the flip round bar and the folding beam are both connected to the fixing mechanism; the hook pressing mechanism comprises a hook pressing cylinder, a hook pressing and a hook pressing transmission mechanism; the hook pressing is connected to the hook pressing cylinder; the hook pressing transmission mechanism comprises a rack, a spur gear, a first bevel gear, a second bevel gear and a hook pressing rotating shaft; one end of the rack is connected to the cylinder shaft of the hook pressing cylinder, the rack is meshed with the spur gear, and the spur gear is fixedly connected to the first bevel gear, the first bevel gear is meshed with the second bevel gear, and the second bevel gear is fixedly connected to the hook pressing rotating shaft , the pressure hook is fixed at one end of the pressure hook rotating shaft, and the folding drive mechanism is divided into two groups, namely the first folding drive mechanism and the second folding drive mechanism; the first folding drive mechanism includes a flip adjustable cylinder, a first gear, a first rotating shaft, a second gear, a second rotating shaft, a flip fixed plate and a flip limit block; the second rotating shaft is connected to the flip joint; the cylinder shaft of the flip adjustable cylinder is connected to the first gear; the first gear is fixedly connected to the first rotating shaft, the second gear is fixedly connected to the second rotating shaft, the second gear is meshed with the first gear, and the flip limit block is respectively arranged on the left and right sides of the first gear; a retaining spring is provided at the lower ends of the first rotating shaft and the second rotating shaft; the structure of the second folding drive mechanism is exactly the same as that of the first folding drive mechanism, and the second folding drive mechanism is connected to the flip joint at the rear flip plate; a flip bearing is provided on the outer side of the first rotating shaft and the second rotating shaft, and the flip bearing is installed on the flip bearing seat; the flip bearing seat is fixed on the flip fixed plate; a flip drive mechanism with the same structure is provided on the other side of the fixing mechanism; The pressure plate clamping mechanism includes multiple groups of pressure plate positioning structures and pressure plate driving structures; the pressure plate synchronous adjustment mechanism includes a base plate, a rectangular belt, a driving wheel and multiple driven wheels; the driving wheel and multiple driven wheels are arranged on the base plate; the rectangular belt is sleeved on the outer edges of the driving wheel and multiple driven wheels; the multiple groups of pressure plate positioning structures are fixed at intervals at the upper and lower ends of the rectangular belt; the pressure plate driving structure is connected to the driving wheel; a pressure plate slide rail is provided on the base plate, and a pressure plate slider is provided on the multiple groups of pressure plate positioning structures; the pressure plate slider is slidably connected to the pressure plate slide rail, and the number of the driven wheels is three, namely the first driven wheel, the second driven wheel and the third driven wheel; the driving wheel and the three driven wheels are respectively arranged on the four corners of the rectangular belt.

2. The folding and pressing structure applicable to vest bags of different specifications as claimed in claim 1, characterized in that: The bag ear folding mechanism comprises a bag ear sliding folding mechanism, a bag ear flattening mechanism, a bag ear lifting mechanism and a bag ear sliding mechanism; the bag ear sliding folding mechanism comprises an upper fork and a lower fork; the upper fork, the lower fork and the bag ear flattening mechanism are arranged in parallel, and the bag ear flattening mechanism is located below the lower fork; the upper fork and the lower fork are both provided with paddles; the paddles of the upper fork include a first paddle and a second paddle, and the paddles of the lower fork include a third paddle and a fourth paddle; the bag ear flattening mechanism comprises a gasket, a bag ear pressing plate, a bag ear pressing plate crossbeam and a bag ear pressing plate synchronous adjustment mechanism; the bag ear pressing plate is connected to the bag ear pressing plate synchronous adjustment mechanism, and the bag ear pressing plate synchronous adjustment mechanism has the same structure as the pressing plate synchronous adjustment mechanism; a gasket is provided above the bag ear pressing plate crossbeam, and the bag ear pressing plate is connected to the bag ear pressing plate below the bag ear pressing plate; the bag ear lifting mechanism comprises a frame fixing plate, a bag ear lifting crossbeam and a bag ear lifting cylinder; The bag ear lifting cylinder is fixed on the frame fixing plate, and its cylinder shaft is connected to the bag ear lifting beam; the bag ear sliding folding mechanism and the bag ear flattening mechanism are respectively connected to the bag ear lifting beam; the bag ear sliding mechanism includes a bag ear slide rail, a bag ear slide rail slide seat and a bag ear sliding cylinder; the bag ear slide rail slide seat is connected to the bag ear slide rail, the cylinder shaft of the bag ear sliding cylinder is connected to the bag ear slide rail slide seat, and the number of bag ear slide rails, bag ear slide rail slide seats and bag ear sliding cylinders is greater than one, and the bag ear slide rail slide seat is respectively connected to the upper fork and the lower fork; the bag ear folding drive mechanism includes a bag ear drive motor and a bag ear drive belt; the bag ear drive motor is drivingly connected to the bag ear drive belt, and the bag ear drive belt is connected to the bag ear folding mechanism.

3. The folding and pressing structure applicable to vest bags of different specifications as claimed in claim 1, characterized in that: The multiple groups of pressure plate positioning structures are divided into two groups, namely the first group of pressure plate positioning structures and the second group of pressure plate positioning structures; the first group of pressure plate positioning structures includes the first pressure plate positioning structure and the second pressure plate positioning structure; the first pressure plate positioning structure includes a positioning cylinder, an L-shaped plate and a positioning pressure plate; one end of the L-shaped plate is connected to the positioning cylinder, and the other end is connected to the positioning pressure plate; the positioning cylinder is fixedly connected to one side of the rectangular belt; the second pressure plate positioning structure has the same structure as the first pressure plate positioning structure, and the positioning cylinder of the second pressure plate positioning structure is fixedly connected to the other side of the rectangular belt; the second group of pressure plate positioning structures has exactly the same structure as the first group of pressure plate positioning structures.

4. The folding and pressing structure applicable to vest bags of different specifications as claimed in claim 1, characterized in that: The fixing mechanism includes side panels, a front crossbeam and an intermediate crossbeam; the intermediate crossbeam is arranged behind the front crossbeam, and the two are arranged in parallel; the two ends of the front crossbeam and the intermediate crossbeam are respectively fixedly connected to a side panel; the front crossbeam is connected to an adjustable pressure rod clamping mechanism, the intermediate crossbeam is connected to a lower fork mechanism, the outer side of the side panel is connected to a folding synchronous adjustment mechanism, and a folding pressure hook mechanism is provided on the inner side, the lower fork mechanism includes a lower fork, a lower fork fixed beam and a lower fork cylinder; the lower fork cylinder is connected to the fixing mechanism, and its cylinder shaft is connected to the lower fork fixed beam; the lower fork is connected to the lower fork fixed beam.

5. The folding and pressing structure applicable to vest bags of different specifications as claimed in claim 4, characterized in that: The adjustable pressure rod clamping mechanism includes a front movable beam, a downward pressure cylinder, a pressure rod adjustable seat and a pressure rod; the downward pressure cylinder is connected to the fixing mechanism, and its cylinder shaft is connected to the front movable beam; the pressure rod adjustable seat is connected to the front movable beam, and the pressure rod is connected to the pressure rod adjustable seat; the downward pressure cylinder is fixed on the front cross beam, and its cylinder shaft passes through the front cross beam and is connected to the front movable beam; a rubber head is fixed to the lower end of the pressure rod.

6. The folding and pressing structure applicable to vest bags of different specifications as claimed in claim 1, characterized in that: The adjustable material receiving mechanism includes a material receiving bottom plate, a material receiving position limiting lifting platform, a material receiving pressing cylinder, a material receiving slide rail, a material receiving slider, a material receiving hand, a material receiving hand fixing plate, a lifting cylinder, a material receiving lifting cylinder, a material receiving sliding mechanism and a material receiving driving mechanism; the material receiving pressing cylinder is located on both sides of the material receiving bottom plate, the material receiving position limiting lifting platform is fixed in the middle of the material receiving bottom plate, the material receiving slide rail is arranged on the material receiving bottom plate, the material receiving hand is fixed on the material receiving hand fixing plate, the material receiving hand fixing plate is fixed on the material receiving slider and connected to the material receiving pressing cylinder The lifting cylinder is connected to the material receiving limit lifting platform, and the material receiving lifting cylinder is connected to the material receiving bottom plate; the material receiving drive mechanism is transmission-connected to the material receiving bottom plate; the material receiving limit lifting platform is provided with a material receiving groove; the material receiving sliding mechanism includes a sliding fixed seat, a sliding rod and a sliding linear bearing seat; the sliding linear bearing seat is connected to the adjustable material receiving mechanism; each end of the sliding rod is connected to a sliding fixed seat, and the sliding fixed seats are respectively arranged on both sides of the fixing mechanism, and the sliding linear bearing seat is sleeved on the sliding rod.

7. The folding and pressing structure applicable to vest bags of different specifications as claimed in claim 1, characterized in that: The adjustable tube positive plate mechanism includes a tube positive plate, a tube positive fixed plate, a tube positive plate bottom plate, a tube positive plate slide rail, a tube positive plate slider, a tube positive plate synchronous adjustment mechanism, a tube positive plate sliding mechanism and a tube positive plate driving mechanism; the tube positive plate synchronous adjustment mechanism and the tube positive plate slide rail are arranged on the tube positive plate bottom plate, the tube positive plate slider is connected to the tube positive plate synchronous adjustment mechanism, the tube positive plate slide rail is slidably connected to the tube positive plate slider, the tube positive plate is connected to the tube positive plate synchronous adjustment mechanism, and the tube positive fixed plate is connected to the tube positive plate slider; the tube positive plate sliding mechanism is arranged on both sides of the tube positive plate bottom plate; the tube positive plate driving mechanism is transmission connected to the tube positive plate bottom plate; the tube positive plate synchronous adjustment mechanism and the pressure plate synchronous adjustment mechanism have exactly the same structure.

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