A twin-pouch filling machine

Abstract

The application discloses a double-giving bag packaging machine, which has a rack, wherein the rack is sequentially provided with a bag bin bag taking mechanism, a main machine rotary disc mechanism, a machine clamp mechanism, an upper bag mechanism, an opening clamp mechanism and a bag supporting mechanism, and a heat sealing mechanism and an inflation mechanism are arranged on the heat sealing mechanism.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of food packaging machines, and particularly relates to a double-bag feeding packaging machine. BACKGROUND

[0002] In the process of realizing the present application, the inventor found that the prior art at least has the following problems:

[0003] The conventional vacuum packaging machine adopts a single-station single-bag packaging mode, and the corresponding mechanism adopts a single-station structure, which is low in working efficiency.

[0004] CN203381789U discloses a bag feeding type automatic packaging machine, which comprises a bottom plate, a material pushing device, a metering device and a power device arranged on the bottom plate, the power device comprises a rotating shaft driven by a motor, a tray, a rotating disc and a vibrating disc are sequentially sleeved on the rotating shaft in the axial direction, the rotating disc and the vibrating disc are fixedly connected with the rotating shaft, a plurality of material cups are arranged on the outer side of the rotating disc along the axial direction thereof, the tray is sleeved outside the rotating shaft, a sleeve cup is arranged on the tray and sleeved outside the material cup, and a plurality of vibrators for shaking the material cups are arranged on the vibrating disc, which cannot solve the above technical problems. SUMMARY

[0005] The present application aims to provide a double-bag feeding packaging machine, which changes the conventional single-station single-bag packaging mode of the packaging machine, realizes single-station double-bag packaging, and greatly accelerates the production speed of a single device.

[0006] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows: a double-bag feeding packaging machine has:

[0007] a rack, the rack is sequentially provided with:

[0008] a bag warehouse bag taking mechanism capable of bagging and taking bags, the bag taking mechanism can take two bag bodies at a time;

[0009] a main machine rotating disc mechanism rotatably installed on the rack;

[0010] a machine clamp mechanism, a series of machine clamp mechanisms are arranged on the main machine rotating disc mechanism, and the machine clamp mechanisms can clamp the bag bodies;

[0011] a bag placing mechanism capable of transferring the bag bodies from the bag warehouse bag taking mechanism to the machine clamp mechanisms;

[0012] an opening clamp mechanism capable of driving the machine clamp mechanisms to open clamps;

[0013] a bag supporting mechanism capable of supporting the bag mouths of the bag bodies on the machine clamp mechanisms;

[0014] a heat sealing mechanism, the heat sealing mechanism is provided with front and rear heat sealing blocks capable of heat sealing the bag mouths of the packaging bags;

[0015] The inflation mechanism can extend into the packaging bag to inflate it.

[0016] A bag clamping mechanism is provided on the heat sealing mechanism; during the inflation process of the inflation mechanism, the bag clamping mechanism can clamp the bag opening.

[0017] One of the above technical solutions has the following advantages or beneficial effects: it changes the traditional single-station, single-bag packaging method of packaging machines, realizes double-bag packaging at a single station, and greatly speeds up the production speed of a single machine. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the double-bag packaging machine provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of a double-bag packaging machine;

[0020] Figures 3-6 for Figure 1 A schematic diagram of the bag retrieval mechanism of a double-feed bag packaging machine;

[0021] Figures 7-9 for Figure 1 A schematic diagram of the clamping mechanism of a double-bag packaging machine;

[0022] Figures 10-12 for Figure 1 A schematic diagram of the opening clamping mechanism of a double-feed bag packaging machine;

[0023] Figures 13-18 for Figure 1 A schematic diagram of the main turntable mechanism of a double-bag packaging machine;

[0024] Figures 19-26 for Figure 1 A schematic diagram of the bag-supporting mechanism of a double-bag packaging machine;

[0025] Figures 27-30 for Figure 1 A schematic diagram of the heat sealing mechanism of a double-bag packaging machine;

[0026] The markings in the above figures are as follows: 1. Bag retrieval mechanism, 101. Bag feeding column, 102. Bag retrieval bottom plate, 103. Adjusting plate, 104. Bag retrieval upright plate, 105. Screw, 106. Nut block, 107. Handle, 108. Adjusting fork, 109. Suction nozzle seat, 1011. Suction nozzle, 1012. Bag retrieval shaft, 1013. Connecting plate, 1014. Bag retrieval connecting rod, 1015. Bag retrieval swing arm, 1016. Bag retrieval cam, 10161. Bag retrieval groove;

[0027] 2. Rack,

[0028] 3. Machine clamp mechanism, 301, machine clamp body, 302, fixed clamp block, 303, ejector rod, 304, pressure wheel, 305, movable clamp block, 306, joint, 307, linkage clamping tooth, 308, machine clamp seat, 309, return spring, 3010, screw shaft, 3011, synchronous dial block;

[0029] 4. Opening clamp mechanism, 401, opening clamp seat, 402, push-pull rod, 403, opening clamp push plate, 404, first fixed block, 405, alignment rod, 406, second fixed block, 407, first pull rod, 408, first swing arm, 409, second pull rod, 4010, second swing arm, 4011, opening clamp cam, 4012, bearing seat;

[0030] 5. Bag supporting mechanism, 501, fixed seat, 502, central rotating shaft, 503, rotating disc,

[0031] 504, linkage mechanism, 5041, pressure wheel seat, 5042, pressure wheel swing rod, 5043, adjustable pressure wheel, 5044, linkage pull rod;

[0032] 505, lifting adjustment structure, 5051, positioning seat, 5052, positioning disc, 50521, adjustment dial block, 5053, connecting ring, 5054, adjustment support, 50541, adjustment pin shaft, 5055, positioning frame, 5056, electric push rod, 5057, adjustment ring;

[0033] 6. Bag supporting mechanism, 601, bag supporting central fixed shaft; 602, bag supporting central rotating shaft;

[0034] 603, bag supporting lifting drive mechanism, 6031, lifting joint, 6032, lifting swing rod, 60321, lifting joint, 60322, cam follower, 6033, lifting cam;

[0035] 604, bag supporting return mechanism, 6041, bag supporting return swing arm, 6042, return connecting rod, 6043, bag supporting return swing arm, 6044, bag supporting return cam,

[0036] 6045, bag supporting cam, 6046, bag supporting swing rod, 6047, bag supporting pull rod;

[0037] 605, bag supporting structure, 6051, bag supporting swing arm, 6052, bag supporting lifting rod, 6053, lifting rod wheel, 6054, outer swing rod, 6055, bag supporting tension spring, 6056, lifting rod connecting shaft;

[0038] 606, bag rod assembly, 6061, outer bag supporting rod, 6062, inner bag supporting rod, 6063, first bag supporting piece, 6064, second bag supporting piece, 6065, proximity switch;

[0039] 7, heat sealing mechanism, 71, rear heat sealing block, 72, front heat sealing block;

[0040] 8, bag clamping mechanism, 801, bag clamping cylinder seat, 802, bag clamping cylinder, 803, clamping plate fixing plate, 804, bag clamping plate, 805, bag clamping sponge;

[0041] 9, inflation mechanism, 901, inflation fixing seat, 902, inflation lifting cylinder, 903, inflation seat, 904, inflation pipe. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Reference Figures 1-2 A double-bag feeding packaging machine has:

[0044] A machine frame 2 is provided with, in sequence:

[0045] A bag warehouse bag taking mechanism 1 is capable of bag taking and bag taking; the bag taking mechanism is capable of taking two bag bodies at a time;

[0046] A main machine turntable mechanism 5 is rotatably installed on the machine frame;

[0047] A machine clamping mechanism 3 is provided with a series of machine clamping mechanisms on the main machine turntable mechanism, and the machine clamping mechanism is capable of clamping a bag body;

[0048] An upper bag mechanism is capable of transferring the bag body from the bag warehouse bag taking mechanism to the machine clamping mechanism;

[0049] An opening clamping mechanism 4 is capable of driving the machine clamping mechanism to open clamp;

[0050] A bag opening supporting mechanism 6 is capable of supporting open the bag opening of the bag body on the machine clamping mechanism;

[0051] A heat sealing mechanism 7 is provided with a front heat sealing block and a rear heat sealing block capable of heat sealing the bag opening of the packaging bag;

[0052] An inflation mechanism 8 is capable of inflating the packaging bag by extending into the packaging bag;

[0053] A bag clamping mechanism 9 is arranged on the heat sealing mechanism; during the inflation process of the inflation mechanism, the bag clamping mechanism is capable of clamping the bag opening.

[0054] The traditional single-station single-bag packaging mode of the packaging machine is changed, single-station double-bag packaging is realized, and the production speed of a single device is greatly accelerated.

[0055] Figures 3-6 Structure diagram of bag warehouse of double-bag packaging machine; has:

[0056] Bag warehouse bottom plate 102; bag warehouse mechanism installed on bag warehouse bottom plate 102; two groups of bag warehouse mechanisms are arranged side by side on the bag warehouse bottom plate 102, the bag warehouse mechanism includes two bag warehouse vertical plates 104, the two bag warehouse vertical plates 104 are slidingly installed on the bag warehouse bottom plate 102, and the two bag warehouse vertical plates 104 can accommodate bag bodies; a bag warehouse adjusting mechanism for adjusting the sliding of the two bag warehouses is further arranged; through the two bag warehouse mechanisms arranged side by side, two groups of bag bodies can be accommodated, the traditional single-station single-bag packaging mode is changed, single-station double-bag loading and bag taking are realized, and the production speed of a single device is greatly accelerated. The bag warehouse mechanism adopts an adjustable structure and can adapt to the use requirements of bag bodies of different sizes.

[0057] The bag taking mechanism is arranged below the bag warehouse mechanism, and the bag taking mechanism can move and adsorb the bag body at the bottom of the bag warehouse mechanism. Through the up-down movement of the bag taking mechanism, the bag body at the bottom of the bag warehouse mechanism is adsorbed and separated from the bag warehouse mechanism, and the subsequent bag taking mechanism is convenient for clamping.

[0058] The bag taking mechanism includes a suction nozzle seat 109 and a bag taking shaft 1012, the bag taking shaft 1012 is movably installed on a rack, the suction nozzle seat 109 is installed at the upper end of the bag taking shaft 1012, the suction nozzle seat 109 is provided with a suction nozzle 1011 capable of adsorbing a bag body, and a driving power mechanism for driving the bag taking shaft 1012 to move is further arranged. Through the up-down movement of the bag taking shaft 1012, the suction nozzle seat 109 is driven to move up and down, so that the suction disc adsorbs the bag body at the bottom of the bag warehouse mechanism and separates from the bag warehouse mechanism, and the subsequent bag taking mechanism is convenient for clamping.

[0059] The bag taking power mechanism has: a bag taking swing arm 1015, which is hingedly connected to the rack at the first end; a bag taking cam 1016, which is rotatably installed on the rack, and the bag taking swing arm 1015 is slidingly installed in a bag taking sliding groove 10161 on the bag taking cam 1016 near the middle part; a bag taking connecting rod 1014, whose first end is hingedly connected to the second end of the bag taking swing arm 1015; a connecting plate 1013, which connects the bag taking shafts 1012 of the two groups of bag warehouse mechanisms; and the second end of the bag taking connecting rod 1014 is hingedly connected to the connecting plate 1013. Through the rotation of the bag taking cam 1016, the swing of the bag taking swing arm 1015 is driven, so that the power is transmitted to the bag taking connecting rod 1014 and the connecting plate 1013, thereby driving the bag taking shaft 1012 to rise and fall. The cam mechanism is a mechanical driving mechanism, which is stable and reliable in work.

[0060] The bag bin adjusting mechanism has a nut block 106 and a screw rod 105, the nut block 106 is installed on the adjusting plate 103, and the screw rod 105 is provided with threads in opposite directions at two ends; the threads at the two ends of the screw rod 105 are matched with the nut blocks 106 of the two adjusting plates 103 respectively. Through the rotation of the screw rod 105, the two adjusting plates 103 on the two sides are driven to move in the same direction or in the opposite direction, so that the adjusting effect of the width of the bag body is realized, so as to adapt to the use requirements of bag bodies of different sizes.

[0061] The bag bin bottom plate 102 is also provided with an adjustable adjusting fork 108, the adjusting fork 108 is arranged between the two bag bin vertical plates 104, and the adjusting fork 108 can limit the end of the bag body. The adjusting fork 108 can limit the front end of the bag body, and in combination with the two bag bin vertical plates 104, the two sides and the rear end of the bag body are limited, so that the reliable limiting of the bag body is realized. A stack of bag bodies can be stacked in the bag bin mechanism.

[0062] The bag bin mechanism also has a bag feeding column 101, the bag feeding column 101 is installed on the rack, and the bag bin bottom plate 102 is installed on the bag feeding column 101, so as to play a supporting role.

[0063] The end of the screw rod 105 is also provided with a handle 107, which is convenient for adjusting the screw rod 105.

[0064] Advantages: automatic bag placing, automatic bag taking, cooperation with double bagging machine, change of traditional single-station single-bag packaging mode, realization of single-station double-bag packaging, and great acceleration of the production speed of a single device.

[0065] Figures 7-9 The bag bin mechanism also has a bag feeding column 101, the bag feeding column 101 is installed on the rack, and the bag bin bottom plate 102 is installed on the bag feeding column 101, so as to play a supporting role.

[0066] The two groups of machine clamp structures are connected through a linkage mechanism; the two groups of machine clamp structures are connected through the linkage mechanism, the traditional single-station single-bag packaging mode is changed, the single-station double-bag clamping is realized, and the production speed of a single device is greatly accelerated.

[0067] The machine clamp structure has: two groups of machine clamp bodies 301 matched with each other; the first end of the machine clamp body 301 is rotatably installed on the rack; the second end of the machine clamp body 301 is provided with a fixed clamp block 302; a top rod 303 is movably installed in the machine clamp body 301; the first end of the top rod 303 is provided with a pressure wheel 304 extending out of the machine clamp body 301; the second end of the top rod 303 is provided with a movable clamp block 305 extending out of the machine clamp body 301, and the movable clamp block 305 and the fixed clamp block 302 can cooperate to clamp the bag body. By driving the top rod 303 to move, the opening and closing between the movable clamp block 305 and the fixed clamp block 302 of the top rod 303 are realized, and the clamping or loosening of the bag body is realized.

[0068] The first end of the movable clamp block 305 is hinged to the fixed clamp block 302; the middle part of the movable clamp block 305 is hinged to the first end of the joint 306, and the second end of the joint 306 is hinged to the second end of the top rod 303. By driving the top rod 303 to move, the top rod 303 drives the joint 306 to move, and the joint 306 drives the movable clamp block 305 to swing around the fixed clamp block 302, so as to open and close the movable clamp block 305 and the fixed clamp block 302, and realize the clamping or loosening of the bag body.

[0069] The linkage mechanism is a linkage tooth 307, and each of the adjacent clamp bodies 301 of the two sets of clamp structures is provided with a linkage tooth 307, and the two linkage teeth 307 are engaged. The linkage tooth 307 is further provided with a synchronous shifting block 3011. By shifting one linkage tooth 307 through the synchronous shifting block 3011, the other linkage tooth 307 is driven to move, so as to realize the linkage adjustment of the opening and closing angles of the two sets of clamp structures. The adjustment of the opening and closing angles of one set of clamp structures can realize the tightening and loosening of the opening of the bag body, and the loosening of the bag opening facilitates the filling of materials, and the tightening of the bag opening facilitates the subsequent sealing operation.

[0070] The machine clamp seat 308 is further provided, the clamp body 301 is fixedly installed on the machine clamp, and the synchronous tooth is installed on the machine clamp seat 308; the synchronous teeth of the two sets of machine clamp seats 308 of the clamp structure are engaged. The machine clamp seat 308 realizes the installation of each structure.

[0071] The top rod 303 is further provided with a return spring 309, so as to realize the return of the top rod 303.

[0072] The machine clamp seat 308 is rotatably installed on the machine frame through a screw shaft 3010, so as to realize the adjustment of the opening and closing angles of the clamp structure.

[0073] Figures 10-12 It is a structure diagram of the opening and loosening clamp mechanism of the double-bag packaging machine.

[0074] The opening and loosening clamp seat 401 is installed on the machine frame; the push-pull rod 402 is hingedly connected to the middle part of the push-pull rod 402; the opening and loosening push plate 403 is hingedly connected to the first end of the push-pull rod 402; by swinging the push-pull rod 402, the opening and loosening push plate 403 is driven to push the pressure roller 304 of the clamp mechanism, and the clamp mechanism is driven to clamp or loosen the bag body.

[0075] The opening and loosening clamp driving mechanism is connected with the second end of the push-pull rod 402 and can drive the push-pull rod 402 to swing, so as to drive the push-pull rod 402 to swing.

[0076] The righting mechanism is arranged on the opening and loosening frame seat, and the righting mechanism is connected with the opening and loosening push plate 403 and can keep the posture of the opening and loosening push plate 403. In the use process, the righting mechanism keeps the posture of the opening and loosening push plate 403, keeps the surface contact between the opening and loosening push plate 403 and the pressure roller 304, the contact is stable and reliable, and the service life is high.

[0077] The aligning mechanism has a first fixed block 404, an aligning rod 405 and a second fixed block 406, the first fixed block 404 is fixed on the opening clamp push plate 403, the second fixed block 406 is fixed on the opening clamp seat 401; the two ends of the aligning rod 405 are respectively hinged to the first fixed block 404 and the second fixed block 406. The hinge points of the push-pull rod 402 and the opening clamp push plate 403, the hinge points of the push-pull rod 402 and the opening clamp seat 401, the hinge points of the aligning rod 405 and the first fixed block 404, and the hinge points of the aligning rod 405 and the second fixed block form a parallelogram. In the process of swinging, the parallelogram can maintain the posture of the opening clamp push plate 403, maintain the surface contact between the opening clamp push plate 403 and the compression wheel 304, the contact is stable and reliable, and the service life is high.

[0078] The opening clamp drive mechanism has a first pull rod 407, a first swing arm 408, a second pull rod 409 and a second swing arm 4010, the first end of the first pull rod 407 is hinged to the second end of the push-pull rod 402; the first end of the first swing arm 408 is hinged to the second end of the first pull rod 407; the first end of the second pull rod 409 is hinged to the second end of the first swing arm 408; the first end of the second swing arm 4010 is hinged to the second end of the second pull rod 409. An opening clamp cam 4011 for driving the second swing arm 4010 to swing is also provided, the middle part of the second swing arm 4010 is hinged to the side of the opening clamp cam 4011. The rotation of the opening clamp cam 4011 drives the second swing arm 4010, the second swing arm 4010 drives the second pull rod 409, the second pull rod 409 drives the first swing arm 408, the first swing arm 408 drives the first pull rod 407, the first pull rod 407 drives the swing of the push-pull rod 402, and the swing of the push-pull rod 402 drives the opening clamp push plate 403 to push the compression wheel 304 of the machine clamp mechanism, and drives the machine clamp mechanism to clamp or loosen the bag body.

[0079] The second end of the second swing arm 4010 is hinged to the bearing seat 4012, and the bearing seat 4012 is installed on the machine frame to provide a mounting swing base point for the second end of the second swing arm 4010.

[0080] Figures 13-18 The structure diagram of the main machine rotating disc mechanism of the double-bag packaging machine is shown in the figure, which has:

[0081] The fixed seat 501 plays a role of installation and fixation. The central shaft 502 penetrates through the fixed seat 501 and is rotatably installed in the fixed seat 501; the rotating disc 503 is fixedly installed on the first end of the central shaft 502; the rotation of the central shaft 502 drives the rotation of the rotating disc 503, thereby driving the clamped bag body to rotate to different workstations.

[0082] The machine clamp mechanism 3 is provided with a series of machine clamp mechanisms 3 on the outer periphery of the rotating disc 503; the machine clamp mechanism 3 can clamp the bag body, and the bag body is rotated to different stations through the rotation of the rotating disc 503.

[0083] The linkage mechanism is installed on the rotating disc 503, and the linkage mechanism can adjust the opening degree of the machine clamp mechanism 3; the opening degree of the bag body is adjusted through the linkage mechanism to adapt to the use of different models of bag bodies. At the same time, the linkage mechanism can also adjust the opening degree of the machine clamp mechanism 3 during the working process, so as to realize the purpose of squeezing the bag opening inward to open the bag opening, thereby facilitating the filling of materials. After the filling of materials is completed, the linkage mechanism drives the adjustment of the opening degree of the machine clamp mechanism 3 to tighten the bag opening, thereby facilitating the subsequent pulling action.

[0084] The lifting adjustment structure 505 is installed on the center rotating shaft 502 in a lifting and sliding manner, and the lifting adjustment structure 505 can drive the linkage mechanism. The overall opening degree of the bag body is adjusted through the lifting adjustment structure 505 to adapt to the use of different models of bag bodies.

[0085] The linkage mechanism has a linkage mechanism 504, a pressure roller swing rod 5042, an adjustment pressure roller 5043, and a linkage pull rod 5044; the linkage mechanism 504 is installed on the rotating disc 503, the pressure roller swing rod 5042 is hinged near the middle part of the linkage mechanism 504, the adjustment pressure roller 5043 is installed on the first end of the pressure roller swing rod 5042, and the first end of the linkage pull rod 5044 is hinged with the second end of the pressure roller swing rod 5042; the second end of the linkage pull rod 5044 is connected with the machine clamp mechanism 3. By pushing the adjustment pressure roller 5043, the pressure roller swing rod 5042 is swung, thereby driving the linkage pull rod 5044 to move, the linkage pull rod 5044 pulls the machine clamp mechanism 3, and the overall opening degree of the machine clamp mechanism 3 is changed to adapt to the use of different models of bag bodies. Adjust the linkage mechanism during use, which can dynamically adjust the opening degree of the machine clamp mechanism 3, and can realize the purpose of squeezing the bag opening inward to open the bag opening, thereby facilitating the filling of materials. After the filling of materials is completed, the linkage mechanism drives the adjustment of the opening degree of the machine clamp mechanism 3 to tighten the bag opening, thereby facilitating the subsequent pulling action.

[0086] The lifting adjusting structure 505 has a positioning seat 5051 slidably mounted on the fixed seat 501, a positioning disc 5052 rotatably mounted on the upper end of the positioning seat 5051, an adjusting ring 5057 mounted on the positioning disc 5052, the upper surface of the adjusting ring 5057 being matched with the linkage mechanism, a connecting ring 5053 mounted on the lower end of the positioning seat 5051, and a lifting driving mechanism capable of adjusting the lifting of the connecting ring 5053. The positioning seat 5051 serves to position the installation, and can slide on the fixed seat 501 as a whole. The positioning seat 5051 provides a mounting basis for the positioning disc 5052 and the adjusting ring 5057. The positioning disc 5052 is rotatably mounted on the positioning seat 5051, and the adjusting ring 5057 is fixedly mounted on the positioning disc 5052. The adjusting ring 5057 is similar to a cam structure, and is matched with the linkage mechanism through the cam structure of the adjusting ring 5057. During the rotation of the positioning disc 5052, the linkage mechanism can be driven to move, the linkage mechanism drives the opening degree of the adjusting mechanism 3, loosens or tightens the bag opening, and facilitates subsequent feeding or pumping actions.

[0087] The lifting driving mechanism has an adjusting support 5054 arranged outside the connecting ring 5053, the adjusting support 5054 being hinged to the connecting ring 5053 through an adjusting pin shaft 50541, a positioning bracket 5055 having a first end mounted on the fixed seat 501 and a second end hinged to the first side of the adjusting support 5054, and a pushing mechanism arranged on the second side of the adjusting support 5054 and hinged to the second side of the adjusting support 5054. The middle part of the adjusting support 5054 is hinged to the connecting ring 5053, the first side of the adjusting support 5054 is arranged with the hinged positioning bracket 5055 to serve as a support, and the second side of the adjusting support 5054 is arranged with the pushing mechanism to serve as a pushing function. During movement, the pushing mechanism pushes the second side of the adjusting support 5054, so that the adjusting support 5054 flips around the positioning bracket 5055 on the first side to generate an inclined angle, so that the pin shaft in the middle part moves upward to lift the connecting ring 5053 connected to the adjusting support 5054, so as to achieve the purpose of pushing the linkage mechanism, thereby adjusting the opening degree of the whole bag body to adapt to the use of different models of bag bodies.

[0088] The pushing mechanism is an electric push rod 5056, the bottom of the electric push rod 5056 being mounted on the fixed seat 501, and the piston rod of the electric push rod 5056 being hinged to the adjusting support 5054. The electric push rod 5056 provides power for the movement of the adjusting support 5054.

[0089] The positioning disc 5052 is rotatably mounted on the positioning seat 5051 through a bearing, and is stable and reliable in rotation.

[0090] The positioning disc 5052 is further provided with an adjusting knob 50521, which can be connected with the adjusting power mechanism. The adjusting knob 50521 is driven by the external adjusting power mechanism, and drives the positioning disc 5052 to rotate, drives the linkage mechanism, and drives the opening degree of the adjusting clamp mechanism 3, so as to loosen or tighten the bag opening, facilitating subsequent feeding or pulling action.

[0091] The second end of the linkage pull rod 5044 is connected with the synchronous knob 3011 of the clamp mechanism 3. The linkage pull rod 5044 drives the synchronous knob 3011 of the clamp mechanism 3, so as to adjust the opening and closing degree of the clamp mechanism 3.

[0092] The upper end of the positioning seat 5051 is further provided with a waterproof cover, which plays a waterproof protection role.

[0093] Figures 19-26 The structure diagram of the bag supporting mechanism of the double-bag packaging machine is shown in the figure.

[0094] The bag supporting arm 6051; the bag rod assembly 606 is installed on the bag supporting arm 6051, and the bag rod assembly 606 can support two groups of bags; the bag supporting structure 605 is installed on the bag supporting arm 6051, and the bag supporting structure 605 can control the bag rod assembly 606, so as to control the opening of the bag.

[0095] The bag supporting return mechanism 604 drives the bag supporting structure 605 to move; the bag supporting structure 605 can be driven to move, so as to control the opening of the bag.

[0096] The bag supporting lifting driving mechanism 603 can drive the bag supporting arm 6051 to lift, can drive the bag supporting arm 6051 to lift, so as to drive the bag rod assembly 606 to lift, realize the action of inserting or separating from the bag.

[0097] The bag rod assembly 606 includes a pair of outer bag supporting rods 6061 and inner bag supporting rods 6062, which are rotatably installed on the bag supporting arm 6051, and the inner bag supporting rods 6062 are rotatably installed in the outer bag supporting rods 6061. The first end of the inner bag supporting rod 6062 extends out of the outer bag supporting rod 6061; the outer bag supporting rod 6061 is provided with a first bag supporting piece 6063, and the inner bag supporting rod 6062 is provided with a second bag supporting piece 6064. By installing the first bag supporting piece 6063 and the second bag supporting piece 6064 on the outer bag supporting rod 6061 and the inner bag supporting rod 6062 respectively, the traditional single-station single-bag packaging mode is changed, the double-bag supporting of single-station is realized, and the production speed of single equipment is greatly accelerated.

[0098] The bag supporting structure 605 has two groups, and the two groups of bag supporting structures 605 are connected with the outer bag supporting rods 6061 and the inner bag supporting rods 6062 respectively. The two groups of bag supporting structures 605 control the outer bag supporting rods 6061 and the inner bag supporting rods 6062 respectively.

[0099] The outer swing rods 6054 are fixedly connected with the outer bag supporting rods 6061 and the inner bag supporting rods 6062 near the middle portions of the outer swing rods 6054 of the two groups of bag supporting structures 605 respectively. The first ends of the outer swing rods 6054 constitute the actuating ends, and the second ends constitute the moving ends. The bag supporting lifting rods 6052 are rotatably installed on the bag supporting swing arms 6051. The actuating ends of the outer swing rods 6054 of the two outer bag supporting rods 6061 are matched with the first bag supporting lifting rods 6052. The actuating ends of the outer swing rods 6054 of the two inner bag supporting rods 6062 are matched with the second bag supporting lifting rods 6052. When the bag supporting lifting rods 6052 are lifted, the actuating ends of the first ends of the outer swing rods 6054 are driven to rotate, and the outer swing rods 6054 drive the outer bag supporting rods 6061 and the inner bag supporting rods 6062 to rotate, so as to realize the bag supporting action.

[0100] The bag supporting springs 6055 are connected with the moving ends of the outer swing rods 6054 of the two outer bag supporting rods 6061 and the moving ends of the outer swing rods 6054 of the two inner bag supporting rods 6062. The bag supporting springs 6055 are pulled to the moving ends of the outer swing rods 6054 of the two outer bag supporting rods 6061, so that the first bag supporting pieces 6063 and the second bag supporting pieces 6064 are in the bag supporting state in the initial state. The elastic force of the bag supporting springs 6055 is overcome by the movement of the bag supporting return mechanism 604, so as to close the first bag supporting pieces 6063 and the second bag supporting pieces 6064, thereby facilitating the insertion of the bag body.

[0101] The two bag supporting lifting rods 6052 are fixedly connected through the lifting rod connecting shafts 6056. The lifting rod connecting shafts 6056 are rotatably installed on the bag supporting swing arms 6051, and the lifting rod connecting shafts 6056 link the movements of the two bag supporting lifting rods 6052. The lifting rod driving ends are also fixedly arranged on the lifting rod connecting shafts 6056, and the lifting rod driving ends can be connected with the bag supporting return power mechanism. The movements of the bag supporting lifting rods 6052 are driven by driving the lifting rod driving ends through the bag supporting return power mechanism.

[0102] The bag supporting return mechanism 604 has the bag supporting swing rods 6046 rotatably installed on the bag supporting swing arms 6051, the bag supporting rods 6047, the first ends of which are hingedly connected with the first ends of the bag supporting swing rods 6046, and the second ends of which are connected with the lifting rod driving ends. The bag supporting swing rods 6046 pull the bag supporting rods 6047, and the bag supporting rods 6047 pull the movements of the lifting rod driving ends.

[0103] The bag supporting return power mechanism can drive the second end of the bag supporting swing lever 6046 to move. The bag supporting return power mechanism has a bag supporting center fixed shaft 601 fixedly installed on the frame, a bag supporting cam 6045 fixedly installed on the first end of the bag supporting center fixed shaft 601, the bag supporting cam 6045 being capable of moving with the driving of the second end of the bag supporting swing lever 6046, a bag supporting center rotating shaft 602 rotatably sleeved on the bag supporting center fixed shaft 601, a bag supporting rotating arm 6051 fixedly installed on the bag supporting center rotating shaft 602, and the bag supporting center rotating shaft 602 being capable of driving the bag supporting rotating arm 6051 to swing. The bag supporting center rotating shaft 602 rotates to drive the bag supporting rotating arm 6051 fixedly installed thereon to rotate, so as to realize the functions of approaching or moving away from the room.

[0104] The rotating power mechanism can drive the bag supporting center rotating shaft 602 to rotate. The rotating power mechanism has a bag supporting return swing arm 6041, a first end of which is fixedly connected with the bag supporting center rotating shaft 602, a return connecting rod 6042, a first end of which is hingedly connected with a second end of the bag supporting return swing arm 6041, a bag supporting return swing arm 6043, a first end of which is hingedly connected with the frame and a second end of which is hingedly connected with a second end of the return connecting rod 6042, and a bag supporting return cam 6044 rotatably installed on the frame, the middle part of the bag supporting return swing arm 6043 being adapted to the bag supporting return cam 6044. The bag supporting return cam 6044 drives the bag supporting return swing arm 6043 to swing, the bag supporting return swing arm 6043 drives the bag supporting return swing arm 6041, and the bag supporting return swing arm 6041 drives the bag supporting center rotating shaft 602 to rotate.

[0105] The bag supporting lifting driving mechanism 603 has a lifting joint 6031 connected with the bag supporting center rotating shaft 602, a lifting swing lever 6032, a first end of which is adapted to the lifting joint 6031, the middle part of the lifting swing lever 6032 being hingedly connected to the support, and a lifting cam 6033 rotatably installed on the support, a second end of the lifting swing lever 6032 being adapted to the lifting cam 6033. The lifting cam 6033 drives the lifting swing lever 6032, the lifting swing lever 6032 drives the lifting joint 60321, the cam follower 60322 on the lifting joint 60321 drives the lifting cam 6033, the lifting cam 6033 drives the bag supporting center rotating shaft 602 to lift, so as to realize the lifting of the bag rod assembly 606 and the insertion or separation from the bag body.

[0106] The support bag rotating arm 6051 is also provided with a proximity switch 6065 for sensing the outer swing lever 6054. Since the opening of the support bag piece is pulled open by the spring, when the bag is hung on the support bag piece outside, the support bag piece cannot continue to open, and the swing lever connected together will stop at this angle and will not be detected by the lower detection switch. Therefore, it is considered that the bag is opened. However, if one side or both sides of the support bag piece is not hung on the bag opening, it will continue to open to the maximum, and the swing lever connected together will be above the detection switch, which will be detected. Therefore, it is considered that the bag is not opened.

[0107] Figures 27-30 The structure diagram of the heat sealing mechanism of the double bag feeding packaging machine; the heat sealing assembly has:

[0108] The heat sealing mechanism 7 is provided with a front heat sealing block 72 and a rear heat sealing block 71 capable of heat sealing the bag opening of the packaging bag; the heat sealing mechanism 7 plays a role in heat sealing and closing the bag opening, and the detailed structure of the heat sealing mechanism 7 is shown in CN110182418A - a food packaging machine heat sealing assembly.

[0109] The inflation mechanism 9 can extend into the packaging bag to inflate the packaging bag; the bag clamping mechanism 8 is arranged on the heat sealing mechanism 7; during the inflation process of the inflation mechanism 9, the bag clamping mechanism 8 can clamp the bag opening. First, the inflation pipe 904 is inserted into the bag, the bag clamping mechanism 8 clamps the bag opening, the inflation pipe 904 inflates, the inflation pipe 904 is extracted after inflation is completed, and the heat sealing mechanism 7 seals the opening. After the bag opening is preliminarily clamped, the gas is filled, and then the heat sealing is started, which can ensure that the bag body is full.

[0110] The inflation mechanism 9 has an inflation lifting cylinder 902, the inflation lifting cylinder 902 is installed on the heat sealing mechanism 7, the piston rod of the inflation lifting cylinder 902 is provided with an inflation seat 903, and the inflation seat 903 is provided with an inflation pipe 904 capable of being inserted into the packaging bag. The inflation pipe 904 is driven by the inflation lifting cylinder 902 to extend into or separate from the bag opening.

[0111] The bag clamping mechanism 8 has a set of bag clamping plates 804 arranged oppositely, the bag clamping plates 804 are provided with bag clamping sponges 805, and the bag clamping sponges 805 of the two bag clamping plates 804 can cooperate to clamp the bag body; and a bag clamping driving mechanism for driving the bag clamping plates 804 to move. By driving a set of bag clamping plates 804 to move, the bag opening is clamped or released. Since the bag clamping plates 804 clamp the bag body through the sponge, there is a certain activity space, which is convenient for the inflation pipe 904 to extend into or separate from the bag opening.

[0112] The heat sealing mechanism 7 is provided with two groups of front heat sealing blocks 72 and rear heat sealing blocks 71, and one group of front heat sealing blocks 72 and rear heat sealing blocks 71 is correspondingly provided with one group of inflation mechanisms 9 and bag clamping mechanisms 8. The two groups of mechanisms correspond to a double-station packaging machine, change the traditional single-station single-bag packaging mode of a vacuum packaging machine, and realize double-bag clamping and loading in a single-station mode, thereby greatly accelerating the production speed of a single device.

[0113] The bag clamping sponge 805 is arranged above the front heat sealing blocks 72 and the rear heat sealing blocks 71, so as to maximize the fullness of the bag body. If the bag clamping sponge 805 is arranged below the front heat sealing blocks 72 and the rear heat sealing blocks 71, the clamping position of the clamping plate will occupy a part of the volume in the bag, and after inflation, the part of the volume will be evenly lost from the air in the bag after the clamping plate is loosened, so that the bag does not have a firm and inflated state. Arranging the bag clamping sponge 805 above the front heat sealing blocks 72 and the rear heat sealing blocks 71 can smoothly solve this problem.

[0114] The bag clamping driving mechanism is a double-sliding-block air cylinder-bag clamping air cylinder 802, and two bag clamping clamping plates 804 are respectively arranged on the two sliding blocks of the double-sliding-block air cylinder. The heat sealing mechanism 7 is further provided with an inflation fixing seat 901, and an inflation lifting air cylinder 902 is arranged on the inflation fixing seat 901.

[0115] The air cylinder controls the bag opening clamping plate, the inflation pipe 904 is first inserted into the bag, the bag opening is clamped by the bag clamping clamping plate 804, the inflation pipe 904 is inflated, the inflation pipe 904 is extracted after inflation is completed, and the heat sealing knife seals the opening.

[0116] The bag opening can be preliminarily clamped, then the gas is inflated, and then the heat sealing is started, so that the fullness of the bag body can be ensured.

[0117] After the above structure is adopted, the traditional single-station single-bag packaging mode of a packaging machine is changed, double-bag processing in a single-station mode is realized, and the production speed of a single device is greatly accelerated.

[0118] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0119] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screwing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the person skilled in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific circumstances.

[0120] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A twin-pouch packaging machine characterized in that, Have: Rack, the rack is equipped with: Bag warehouse bag taking mechanism, can be bagged and take bags; The bag warehouse bag taking mechanism can take two bags at a time; Main machine turntable mechanism, rotationally installed on the rack; Machine clamp mechanism, a series of machine clamp mechanisms are provided on the main machine turntable mechanism, and the machine clamp mechanisms can clamp bags; Upper bag mechanism, which can transfer bags from the bag warehouse bag taking mechanism to the machine clamp mechanism; Loose clamp mechanism, which can drive the machine clamp mechanism to loosen the clamp; Bag opening mechanism, which can open the bag opening of the bag on the machine clamp mechanism; Heat sealing mechanism, which is provided with front heat sealing blocks and rear heat sealing blocks capable of heat sealing the bag opening of the packaging bag; Inflation mechanism, which can extend into the packaging bag to inflate the packaging bag; Bag clamping mechanism, which is provided on the heat sealing mechanism; During the inflation process of the inflation mechanism, the bag clamping mechanism can clamp the bag opening; The loose clamp mechanism has: Loose clamp seat, installed on the rack; Push-pull rod, hinged near the middle part of the push-pull rod; Open clamp push plate, hinged on the first end of the push-pull rod; Loose clamp driving mechanism connected with the second end of the push-pull rod and capable of driving the push-pull rod to swing; Righting mechanism, provided on the loose clamp seat, connected with the open clamp push plate and capable of maintaining the posture of the open clamp push plate; The inflation mechanism has an inflation lifting cylinder, the inflation lifting cylinder is installed on the heat sealing mechanism, a piston rod of the inflation lifting cylinder is provided with an inflation seat, the inflation seat is provided with an inflation tube capable of being inserted into the packaging bag; The bag clamping mechanism has a set of oppositely arranged bag clamping plates, the bag clamping plates are provided with bag clamping sponges, the bag clamping sponges of the two bag clamping plates can cooperate to clamp the bag; Also provided is a bag clamping driving mechanism for driving the bag clamping plates to move; The heat sealing mechanism is provided with two groups of front heat sealing blocks and rear heat sealing blocks, a group of inflation mechanisms and bag clamping mechanisms are provided corresponding to each group of front heat sealing blocks and rear heat sealing blocks; The bag clamping sponges are arranged above the front heat sealing blocks and the rear heat sealing blocks; The bag clamping driving mechanism is a double sliding block cylinder, the two bag clamping plates are respectively installed on the two sliding blocks of the double sliding block cylinder; The heat sealing mechanism is further provided with an inflation fixing seat, and the inflation lifting cylinder is installed on the inflation fixing seat; The aligning mechanism has a first fixed block, an aligning rod and a second fixed block, the first fixed block is fixed on the opening clamp push plate, and the second fixed block is fixed on the opening clamp seat; the two ends of the aligning rod are respectively hinged to the first fixed block and the second fixed block; the hinged points of the push-pull rod and the opening clamp push plate, the push-pull rod and the opening clamp seat, the aligning rod and the first fixed block and the aligning rod and the second fixed block enclose a parallelogram; the opening clamp drive mechanism has a first pull rod, a first swing arm, a second pull rod and a second swing arm, the first end of the first pull rod is hinged to the second end of the push-pull rod; the first end of the first swing arm is hinged to the second end of the first pull rod; the first end of the second pull rod is hinged to the second end of the first swing arm; the first end of the second swing arm is hinged to the second end of the second pull rod; an opening clamp cam for driving the second swing arm to swing is further arranged, the middle part of the second swing arm is hinged to the side of the opening clamp cam; the second end of the second swing arm is hinged to the bearing seat, and the bearing seat is installed on the rack.

2. The twin-feed bag packaging machine of claim 1, wherein, The bag warehouse taking mechanism has: a bag warehouse bottom plate; a bag warehouse mechanism installed on the bag warehouse bottom plate; two groups of bag warehouse mechanisms are arranged side by side on the bag warehouse bottom plate, the bag warehouse mechanism comprises two bag warehouse vertical plates, the two bag warehouse vertical plates are slidingly installed on the bag warehouse bottom plate, and the two bag warehouse vertical plates can accommodate bag bodies; a bag warehouse adjusting mechanism for adjusting the sliding of the two bag warehouses is further arranged; a bag sucking mechanism arranged below the bag warehouse mechanism, the bag sucking mechanism can move and suck the bag body at the bottom of the bag warehouse mechanism.

3. The twin-feed bag packaging machine of claim 2, wherein, The machine clamp mechanism has: two groups of machine clamp structures connected through a linkage mechanism; The machine clamp structure has: two groups of machine clamp bodies matched with each other; the first end of the machine clamp body is rotatably installed on the rack; the second end of the machine clamp body is provided with a fixed clamp block; a top rod movably installed in the machine clamp body; the first end of the top rod is provided with a pressing wheel extending out of the machine clamp body; the second end of the top rod is provided with a movable clamp block extending out of the machine clamp body, and the movable clamp block and the fixed clamp block can cooperate to clamp the bag body.

4. The twin-feed bag packaging machine of claim 3, wherein, The main machine turntable mechanism has: a fixed seat; a central rotating shaft penetrating through the fixed seat and rotatably installed in the fixed seat; a turntable fixedly installed at the first end of the central rotating shaft; a machine clamp mechanism, a series of machine clamp mechanisms are arranged on the outer periphery of the turntable; a linkage mechanism installed on the turntable, the linkage mechanism can adjust the opening degree of the machine clamp mechanism; a lifting adjusting structure slidingly installed on the central rotating shaft, the lifting adjusting structure can drive the linkage mechanism.

5. The twin-feed bag packaging machine of claim 4, wherein, The bag supporting mechanism has: a bag supporting rotating arm; a bag rod assembly installed on the bag supporting rotating arm, the bag rod assembly can support two groups of bag bodies; a bag supporting structure installed on the bag supporting rotating arm, the bag supporting structure can manipulate the bag rod assembly; a bag supporting return mechanism for driving the bag supporting structure to move; a bag supporting lifting drive mechanism capable of driving the bag supporting rotating arm to lift.

6. The twin-feed bag packaging machine of claim 5, wherein, The bag taking power mechanism has: a bag taking swing arm hinged at the first end to the rack; a bag taking cam rotatably installed on the rack, the middle part of the bag taking swing arm is slidingly installed in a bag taking sliding groove on the bag taking cam; A bag taking link, a first end of which is hingedly connected to a second end of a bag taking swing arm; A connecting plate, which connects bag taking shafts of two groups of bag bin mechanisms; a second end of the bag taking link is hingedly connected to the connecting plate; The bag bin adjusting mechanism has a nut block and a screw rod, the nut block is installed on the adjusting plate, and the screw rod is provided with threads in opposite directions at two ends thereof; the threads at the two ends of the screw rod are matched with the nut blocks of the two adjusting plates, respectively; The bag bin bottom plate is further provided with an adjustable adjusting fork, the adjusting fork is arranged between the two bag bin vertical plates, and the adjusting fork can limit the end of the bag body; The bag taking mechanism further has a bag feeding column, the bag feeding column is installed on the rack, and the bag bin bottom plate is installed on the bag feeding column; The screw rod is further provided with a handle at an end thereof.

7. Double-fed bag packaging machine according to any of claims 5-6, characterized in that The linkage mechanism has a pressure roller seat, a pressure roller swing lever, an adjusting pressure roller and a linkage pull rod, the pressure roller seat is installed on the rotating disc, the pressure roller swing lever is hingedly connected to the pressure roller seat near the middle portion thereof, the adjusting pressure roller is installed on a first end of the pressure roller swing lever, and a first end of the linkage pull rod is hingedly connected to a second end of the pressure roller swing lever; a second end of the linkage pull rod is connected to the machine clamp mechanism; the lifting adjusting structure has a positioning seat which is slidingly installed on the fixing seat, a positioning disc which is rotatably installed on an upper end of the positioning seat, an adjusting ring which is installed on the positioning disc, an upper surface of the adjusting ring being matched with the linkage mechanism, a connecting ring which is installed on a lower end of the positioning seat, and a lifting driving mechanism which can adjust the lifting of the connecting ring; the lifting driving mechanism has an adjusting support which is arranged on the outer side of the connecting ring, and the adjusting support is hingedly connected to the connecting ring through an adjusting pin shaft; A positioning frame, a first end of which is installed on the fixing seat, a second end of the positioning frame being hingedly connected to a first side of the adjusting support; a pushing mechanism which is arranged on a second side of the adjusting support and is hingedly connected to the second side of the adjusting support; the pushing mechanism is an electric push rod, a bottom of the electric push rod is installed on the fixing seat, and a piston rod of the electric push rod is hingedly connected to the adjusting support; the positioning disc is rotatably installed on the positioning seat through a bearing; the positioning disc is further provided with an adjusting knob, the adjusting knob being capable of being connected to the adjusting power mechanism; a second end of the linkage pull rod is connected to a synchronous knob of the machine clamp mechanism.

8. The twin-feed pouch packaging machine of claim 7, wherein, The bag pole assembly comprises a pair of outer supporting bag poles and inner supporting bag poles, the outer supporting bag poles and the inner supporting bag poles are rotatably installed on a bag supporting rotating arm, the inner supporting bag poles are rotatably installed in the outer supporting bag poles, and the first ends of the inner supporting bag poles extend out of the outer supporting bag poles; the outer supporting bag poles are provided with first bag supporting pieces, and the inner supporting bag poles are provided with second bag supporting pieces; the bag supporting structure has two groups, and the two groups of bag supporting structures are connected with the outer supporting bag poles and the inner supporting bag poles respectively; the bag supporting structure comprises an outer swing rod, the middle part of the outer swing rod of each group of bag supporting structures is fixedly connected with the outer supporting bag pole and the inner supporting bag pole respectively, the first end of the outer swing rod forms a pushing end, and the second end forms a moving end; a bag supporting lifting rod is rotatably installed on the bag supporting rotating arm, the pushing end of the outer swing rod of the two outer supporting bag poles is matched with a first bag supporting lifting rod, the pushing end of the outer swing rod of the two inner supporting bag poles is matched with a second bag supporting lifting rod, a first bag supporting spring is connected with the moving end of the outer swing rod of the two outer supporting bag poles, a second bag supporting spring is connected with the moving end of the outer swing rod of the two inner supporting bag poles, the two bag supporting lifting rods are fixedly connected through a lifting rod connecting shaft, the lifting rod connecting shaft is rotatably installed on the bag supporting rotating arm, a lifting rod driving end is further fixedly arranged on the lifting rod connecting shaft, and the lifting rod driving end can be connected with a bag supporting return power mechanism; the bag supporting return mechanism comprises a bag supporting swing rod rotatably installed on the bag supporting rotating arm, a bag supporting pull rod, a first end of the bag supporting pull rod is hingedly connected with a first end of the bag supporting swing rod, a second end of the bag supporting pull rod is connected with the lifting rod driving end, and a bag supporting return power mechanism can drive the second end of the bag supporting swing rod to move; the bag supporting return power mechanism comprises a bag supporting center fixed shaft fixedly installed on a rack, a bag supporting cam fixedly installed on a first end of the bag supporting center fixed shaft, the bag supporting cam can drive the second end of the bag supporting swing rod to move, a bag supporting center rotating shaft rotatably sleeved on the bag supporting center fixed shaft, the bag supporting rotating arm is fixedly installed on the bag supporting center rotating shaft, and the bag supporting center rotating shaft can drive the bag supporting rotating arm to swing; a rotating power mechanism can drive the bag supporting center rotating shaft to rotate; the rotating power mechanism comprises a bag supporting return rocker arm, a first end of the bag supporting return rocker arm is fixedly connected with the bag supporting center rotating shaft, a return connecting rod, a first end of the return connecting rod is hingedly connected with a second end of the bag supporting return rocker arm, a bag supporting return swing arm, a first end of the bag supporting return swing arm is hingedly connected with the rack, a second end of the bag supporting return swing arm is hingedly connected with a second end of the return connecting rod, and a bag supporting return cam is rotatably installed on the rack, and the middle part of the bag supporting return swing arm is matched with the bag supporting return cam.

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