A simple packaging machine

Abstract

A simple-to-operate packaging machine includes a frame, a material compression device, a bag feeding device, a bag opening device, a sealing device, and a pusher mechanism. The bag opening device includes a bag opening base, a suction device, a first feeding plate, a second feeding plate, a first opening mechanism, and a second opening mechanism. The suction device includes a first suction nozzle, a second suction nozzle, and a suction nozzle lifting mechanism. The bag opening device further includes a first left-right sliding seat and a second left-right sliding seat. The bag opening base is equipped with a first left-right sliding mechanism capable of driving the first and second left-right sliding seats. The first feeding plate, the first opening mechanism, and the first suction nozzle are all mounted on the first left-right sliding seat, and the second feeding plate, the second opening mechanism, and the second suction nozzle are all mounted on the second left-right sliding seat. The bag opening device in this invention allows for convenient and quick adjustment of the positions of the left and right side components, ensuring that the spacing between corresponding components on the left and right sides meets production requirements.

Description

Technical Field

[0001] This invention relates to packaging machinery, and more specifically to a packaging machine that is easy to operate. Background Technology

[0002] Existing packaging machines for sheet materials (such as diapers and sanitary napkins) mainly include a frame, a material compression device, a bag feeding device, a bag opening device, a sealing device, and a pushing mechanism. The material compression device, bag opening device, and sealing device are sequentially arranged on the frame, with the pushing mechanism positioned above the material compression device and the bag feeding device located to one side of the bag opening device. The bag feeding device delivers the packaging bag to the bag opening device, which then opens the bag's opening. The material compression device compresses the stacked sheet material, which is then pushed into the bag opened by the pushing mechanism. Further pushing by the pushing mechanism, the bag containing the sheet material reaches the sealing device, where it seals the bag's opening.

[0003] For example, Chinese invention application CN104843248A discloses a fully automatic diaper packaging production line, which includes a stacker, a pre-compression device, a transition mechanism, a secondary compression device, a bag feeding device, a bag opening device, a packaging sealing and cutting device, a pusher mechanism, and an edge material collection device. The stacker, pre-compression device, transition mechanism, secondary compression device, bag opening device, and packaging sealing and cutting device are arranged in sequence. The pusher mechanism is located above the transition mechanism and the secondary compression device. The bag feeding device is located on one side of the bag opening device, and the edge material collection device is located on one side of the packaging sealing and cutting device.

[0004] The bag-opening device of the aforementioned fully automatic diaper packaging production line includes a bag-opening base, an adsorption device, a first opening mechanism, and a second opening mechanism. The first and second opening mechanisms, as well as the adsorption device, are all mounted on the bag-opening base. The first and second opening mechanisms are located on the left and right sides of the bag-opening base, respectively, while the adsorption device is located in front of the first and second opening mechanisms. Each of the first and second opening mechanisms includes a swing mechanism, a movable seat, an upper bag-opening plate, a lower bag-opening plate, and an opening and closing mechanism for driving the upper and lower bag-opening plates to open and close vertically. The swing mechanism is mounted on the bag-opening base. The movable seat is mounted on the power output end of the swing mechanism. The opening and closing mechanism is mounted on the movable seat. The rear ends of the upper and lower bag-opening plates are connected to the opening and closing mechanism. The swing mechanism includes a swing cylinder, a swing shaft, and a swing connecting rod. The swing shaft and the swing cylinder are both mounted on the bag-opening base. One end of the swing connecting rod is connected to the swing shaft, and the piston rod of the swing cylinder is connected to the middle of the swing connecting rod. The movable seat is mounted on the second end of the swing connecting rod. The extension and retraction of the piston rod of the swing cylinder pushes the swing connecting rod to rotate around the swing axis, thereby realizing the swing of the movable seat. The opening and closing mechanism includes a bracket, an opening and closing cylinder, an opening and closing shaft, and a connecting piece; the bracket is installed on the movable seat; the opening and closing shaft is rotatably installed on the upper end of the bracket; the connecting piece is fixedly installed on the opening and closing shaft; the opening and closing cylinder is installed on the bracket, and the piston rod of the opening and closing cylinder is hinged to the connecting piece; the rear end of the upper bag opening plate is connected to the connecting piece; the rear end of the lower bag opening plate is connected to the bracket. The above-mentioned adsorption device includes two suction cups (bag suction nozzles) and two suction cup lifting mechanisms that drive the suction cups to rise and fall. The power output end of the suction cup lifting mechanism is connected to the suction cup. The suction cup lifting mechanism drives the suction cup to descend and lift the upper side of the packaging bag, and then drives the suction cup to rise and open the bag opening. After the upper bag opening plate and the lower bag opening plate are inserted into the bag opening, the suction cup releases its adsorption on the upper side of the packaging bag.

[0005] Before production begins, the distance between the first and second opening mechanisms needs to be adjusted according to the size of the bag opening (e.g., using a first and second adjustment mechanism), and the distance between the two suction cups (bag suction nozzles) also needs to be adjusted. Furthermore, a first and second feeding plate are typically located behind the first and second opening mechanisms, respectively. The gap between the first and second feeding plates forms the feeding channel. Before production, the distance between the first and second feeding plates also needs to be adjusted according to the size of the bag opening. Moreover, after adjustment, the positions of the opening mechanism, suction cups (bag suction nozzles), and feeding plate on the left and right sides must correspond. Because the adjustments to these distances are performed separately, and repeated calibration is required after adjustment to ensure the positions of the components on the left and right sides correspond, the operation is very cumbersome, time-consuming, and labor-intensive. Summary of the Invention

[0006] The technical problem to be solved by this invention is to provide a packaging machine that is easy to operate. The bag-opening device in this packaging machine can conveniently and quickly adjust the positions of the left and right side components, ensuring that the spacing between corresponding components on the left and right sides meets production requirements. The technical solution adopted is as follows:

[0007] A simple-to-operate packaging machine includes a frame, a material compression device, a bag feeding device, a bag opening device, a sealing device, and a pusher mechanism. The material compression device, bag opening device, and sealing device are sequentially arranged on the frame. The pusher mechanism is located above the material compression device, and the bag feeding device is located to one side of the bag opening device. The bag opening device includes a bag opening base, an adsorption device, a first feed plate, a second feed plate, a first opening mechanism, and a second opening mechanism. The bag opening base is mounted on the frame. The first and second feed plates are arranged side by side, and the first and second opening mechanisms are also arranged side by side. The adsorption device... The device includes a first suction nozzle, a second suction nozzle, and a suction nozzle lifting mechanism capable of driving the two suction nozzles to rise and fall. The first and second suction nozzles are arranged side by side. The device is characterized in that: the bag opening device further includes a first left-right translation seat and a second left-right translation seat. The bag opening base is provided with a first left-right translation mechanism capable of driving the first left-right translation seat and the second left-right translation seat to move closer to or further away from each other in the left-right direction. The first feeding plate, the first opening mechanism, and the first suction nozzle are all installed on the first left-right translation seat, and the second feeding plate, the second opening mechanism, and the second suction nozzle are all installed on the second left-right translation seat.

[0008] In the bag-opening device of the aforementioned packaging machine, the first feeding plate, the first spreading mechanism, and the first suction nozzle are all mounted on the first left-right sliding seat, and the second feeding plate, the second spreading mechanism, and the second suction nozzle are all mounted on the second left-right sliding seat. When it is necessary to adjust the spacing (for example, when the spacing needs to be adjusted according to the size of the bag opening), the first left-right sliding mechanism drives the first and second left-right sliding seats to move closer or further apart in the left-right direction. This allows for the simultaneous adjustment of the spacing between the first and second spreading mechanisms, the spacing between the first and second feeding plates, and the spacing between the first and second suction nozzles, ensuring that the spacing between corresponding components on the left and right sides meets production requirements. The spacing adjustment between corresponding components on the left and right sides is performed synchronously, which is convenient and quick. Moreover, the relative positions of the first feeding plate, the first spreading mechanism, and the first suction nozzle on the first left-right sliding seat remain unchanged before and after adjustment, and the relative positions of the second feeding plate, the second spreading mechanism, and the second suction nozzle on the second left-right sliding seat also remain unchanged, usually eliminating the need for recalibration.

[0009] When the aforementioned packaging machine is working, the material compression device compacts a stack of sheet materials (such as a stack of diapers, usually from a stacker crane, which stacks the sheet materials). The bag feeding device delivers the packaging bag to the bottom of the suction device, which lifts the upper side of the packaging bag to open the bag opening. The first and second opening mechanisms are inserted forward into the bag opening (after the first and second opening mechanisms are inserted into the bag opening, the suction device can release the suction on the upper side of the packaging bag), thus opening the bag opening to a suitable width and height. Then, the pusher mechanism pushes the compacted stack of sheet materials from the material compression device. The sheet materials pass through the gap between the first and second feed plates, and then through the gap between the first and second opening mechanisms to enter the packaging bag. With further pushing by the pusher mechanism, the packaging bag containing the sheet materials reaches the sealing device, where the sealing device seals the bag opening.

[0010] In a preferred embodiment, the aforementioned suction nozzle lifting mechanism includes a suction nozzle crossbar, a first suction nozzle slider, a second suction nozzle slider, a first suction nozzle upright, a second suction nozzle upright, a first upright guide block, and a second upright guide block. A suction nozzle crossbar lifting drive mechanism capable of driving the suction nozzle crossbar to rise and fall is provided on the frame. A left-right oriented suction nozzle transverse guide rail is provided on the suction nozzle crossbar. The first and second suction nozzle sliders are both mounted on the suction nozzle transverse guide rail and can move along it. The first suction nozzle upright is connected to the first suction nozzle slider, and the first suction nozzle is mounted on the upper end of the first suction nozzle upright. The second suction nozzle upright is connected to the second suction nozzle slider. The system is as follows: a second suction nozzle is installed on the upper end of a second suction nozzle upright; a first upright guide block is installed on a first left-right sliding seat, and the first upright guide block has a vertically oriented first upright guide groove or first upright guide hole, in which the first suction nozzle upright is located, and the first suction nozzle upright can rise and fall relative to the first upright guide block; a second upright guide block is installed on a second left-right sliding seat, and the second upright guide block has a vertically oriented second upright guide groove or second upright guide hole, in which the second suction nozzle upright is located, and the second suction nozzle upright can rise and fall relative to the second upright guide block. A suction nozzle crossbar lifting drive mechanism is used to drive the suction nozzle crossbar to rise and fall, thereby driving the first and second suction nozzles to rise and fall simultaneously through the first and second suction nozzle uprights. When the first left-right sliding seat moves in the left-right direction, it drives the first suction nozzle upright, the first suction nozzle, and the first suction nozzle slider to move together through the first upright guide groove (or the first upright guide hole); when the second left-right sliding seat moves in the left-right direction, it drives the second suction nozzle upright, the second suction nozzle, and the second suction nozzle slider to move together through the second upright guide groove (or the second upright guide hole). After adjusting the distance between the first and second left-right sliding seats, that is, after adjusting the distance between the first and second suction nozzles, the first suction nozzle slider, the second suction nozzle slider, and the suction nozzle crossbar can be fixed together by locking components (such as bolts or screws), so that the suction nozzle crossbar lifting drive mechanism can drive the suction nozzle crossbar, the first suction nozzle slider, the second suction nozzle slider, the first suction nozzle upright, the second suction nozzle upright, the first suction nozzle, and the second suction nozzle to rise and fall together more smoothly.

[0011] In a more preferred embodiment, the aforementioned suction nozzle crossbar lifting drive mechanism includes a suction nozzle crossbar lifting drive motor, a first rotating shaft, a first connecting rod, and a second connecting rod. The first rotating shaft is rotatably mounted on the frame and is arranged horizontally. One end of the first connecting rod is connected to the first rotating shaft, and the other end of the first connecting rod is hinged to one end of the second connecting rod. The other end of the second connecting rod is hinged to the suction nozzle crossbar. The power output shaft of the suction nozzle crossbar lifting drive motor is drively connected to the first rotating shaft. The aforementioned suction nozzle crossbar lifting drive mechanism can also employ a cylinder, or a structure in which a motor and a synchronous belt (or chain, gear / rack, nut / screw) work together.

[0012] In another preferred embodiment, the aforementioned suction nozzle lifting mechanism includes a first suction nozzle lifting drive mechanism capable of driving the first suction nozzle to lift and lower, and a second suction nozzle lifting drive mechanism capable of driving the second suction nozzle to lift and lower. The first suction nozzle lifting drive mechanism is mounted on a first left-right sliding seat, and its power output end is connected to the first suction nozzle. The second suction nozzle lifting drive mechanism is mounted on a second left-right sliding seat, and its power output end is connected to the second suction nozzle. Both the first and second suction nozzle lifting drive mechanisms can be cylinders, with the piston rod pointing upwards or downwards, and the piston rod serving as the power output end. Alternatively, both mechanisms can employ a structure where a motor and a synchronous belt (or chain, gear / rack, nut / screw) work together.

[0013] In a preferred embodiment, the aforementioned first left-right translation mechanism includes a first bag-opening translation guide rail, a bag-opening translation screw, and two bag-opening translation nuts. The first bag-opening translation guide rail is disposed on the bag-opening base and extends in the left-right direction. The first and second left-right translation seats are respectively provided with first sliders that slide in cooperation with the first bag-opening translation guide rail. The bag-opening translation screw is rotatably mounted on the bag-opening base in the horizontal direction. The bag-opening translation screw has a first forward threaded section and a first reverse threaded section. The two bag-opening translation nuts are respectively screwed into the first forward threaded section and the first reverse threaded section, and are respectively connected to the first and second left-right translation seats. Typically, multiple first bag-opening translation guide rails are provided (e.g., two or three). Multiple first sliders are provided on the first left-right translation seats, with each first bag-opening translation guide rail corresponding to one or more first sliders on the first left-right translation seat. Multiple first sliders are provided on the second left-right translation seats, with each first bag-opening translation guide rail corresponding to one or more first sliders on the second left-right translation seat. By rotating the bag-opening translation screw, the two bag-opening translation nuts can be driven to move closer to each other or separate from each other, thereby causing the first left-right translation seat and the second left-right translation seat to move closer to each other or separate from each other.

[0014] In one specific embodiment, the aforementioned first left-right translation mechanism further includes a left-right translation drive motor, which is mounted on the bag-opening base. The bag-opening translation screw is connected to the power output shaft of the left-right translation drive motor. The left-right translation drive motor drives the bag-opening translation screw to rotate forward or reverse, which can drive the two bag-opening translation nuts to move closer together or separate from each other, thereby causing the first left-right translation seat and the second left-right translation seat to move closer together or separate from each other.

[0015] In another specific embodiment, the aforementioned first left-right translation mechanism further includes a first adjusting handwheel, which is mounted on one end of the bag-opening translation screw. Manually rotating the first adjusting handwheel causes the bag-opening translation screw to rotate forward or backward, which drives the two bag-opening translation nuts to move closer together or separate from each other, thereby causing the first left-right translation seat and the second left-right translation seat to move closer together or separate from each other.

[0016] In another specific embodiment, the aforementioned first left-right translation mechanism further includes a left-right translation drive motor and a first adjusting handwheel. The left-right translation drive motor is mounted on the bag-opening base, one end of the bag-opening translation screw is connected to the power output shaft of the left-right translation drive motor, and the first adjusting handwheel is mounted on the other end of the bag-opening translation screw. The left-right translation drive motor can be used for driving, or the first adjusting handwheel can be manually rotated to make the bag-opening translation screw rotate forward or backward. Operators can adjust it electrically or manually, providing greater flexibility.

[0017] In a more preferred embodiment, the first left and right translation seats and the second left and right translation seats are respectively provided with locking structures that cooperate with the first bag opening translation guide rail. When the locking structure is locked, it is fixed with the corresponding position of the first bag opening translation guide rail, thereby fixing the positions of the first left and right translation seats and the second left and right translation seats.

[0018] In a further preferred embodiment, the locking structure includes a locking slider, a locking bolt, and a locking nut. The locking slider includes a front clamping part and a rear clamping part. The upper end of the front clamping part and the upper end of the rear clamping part are integrated. There is a gap between the middle of the front clamping part and the middle of the rear clamping part. The lower part of the front clamping part and the lower part of the rear clamping part are respectively provided with sliding grooves that match the first bag opening translation guide rail. The middle of the front clamping part is provided with a front through hole running in a front-back direction, and the middle of the rear clamping part is provided with a rear through hole running in a front-back direction. The front through hole and the rear through hole are aligned with each other. The shank of the locking bolt passes through the front through hole and the rear through hole. The head of the locking bolt and the locking nut are located on the front and rear sides of the locking slider, respectively. When the first left and right sliding seats and the second left and right sliding seats are in the required positions, tighten the connection between the locking bolt and the locking nut so that the head of the locking bolt and the locking nut together apply clamping force to the middle of the front clamping part and the middle of the rear clamping part. At this time, the gap narrows, and the sliding groove wall of the lower part of the front clamping part and the lower part of the rear clamping part clamps the corresponding first bag opening sliding guide rail, so that the locking structure and the first left and right sliding seats (or the second left and right sliding seats) are fixed with the corresponding first bag opening sliding guide rail, so that the positions of the first left and right sliding seats and the second left and right sliding seats on the bag opening base remain unchanged in subsequent work. When it is necessary to adjust the positions of the first left and right sliding seats and the second left and right sliding seats, loosen the connection between the locking bolt and the locking nut so that the head of the locking bolt and the locking nut no longer apply clamping force to the middle of the front clamping part and the middle of the rear clamping part. At this time, the sliding groove wall of the lower part of the front clamping part and the lower part of the rear clamping part no longer clamps the corresponding first bag opening sliding guide rail, so that the locking structure can move along the first bag opening sliding guide rail with the first left and right sliding seats (or the second left and right sliding seats).

[0019] In a preferred embodiment, the bag opening device further includes a first front-to-back translation seat, a second front-to-back translation seat, and a front-to-back translation mechanism. The front-to-back translation mechanism can drive the first and second front-to-back translation seats to translate back and forth relative to the first and second left-to-right translation seats, respectively. A first opening mechanism is mounted on the first front-to-back translation seat, and a second opening mechanism is mounted on the second front-to-back translation seat. During production, after the adsorption device lifts the upper side of the packaging bag to open the bag opening, the first and second opening mechanisms, driven by the front-to-back translation mechanism, insert forward into the bag opening, further opening the bag opening to a suitable width and height. After filling the packaging bag with material, the first and second opening mechanisms, driven by the front-to-back translation mechanism, move backward and withdraw from the bag opening.

[0020] In a more preferred embodiment, both the first left-right translation seat and the second left-right translation seat are provided with a second bag-opening translation guide rail, which extends in the front-back direction; the first front-back translation seat is provided with a second slider that cooperates with the second bag-opening translation guide rail on the first left-right translation seat, and the second front-back translation seat is provided with a second slider that cooperates with the second bag-opening translation guide rail on the second left-right translation seat.

[0021] In a more preferred embodiment, the aforementioned forward and backward translation mechanism includes a forward and backward translation drive motor, a second rotating shaft, a third connecting rod, a fourth connecting rod, and a translation seat crossbar. The second rotating shaft is rotatably mounted on the bag-opening base. One end of the third connecting rod is connected to the second rotating shaft, and the other end of the third connecting rod is hinged to one end of the fourth connecting rod. The other end of the fourth connecting rod is hinged to the translation seat crossbar. The power output shaft of the forward and backward translation drive motor is drively connected to the second rotating shaft. The first and second forward and backward translation seats are connected to the translation seat crossbar. The relative positions of the first and second forward and backward translation seats and the translation seat crossbar are adjustable. In a specific embodiment, the translation seat crossbar is provided with a third bag-opening translation guide rail running left and right. The first and second forward and backward translation seats are respectively provided with a third slider that cooperates with the third bag-opening translation guide rail. When it is necessary to adjust the distance between the first and second opening mechanisms, the third slider on the first and second front-to-back translation seats can move along the third bag opening translation guide rail. At this time, the first left-to-right translation seats, the first front-to-back translation seats, and the first opening mechanism move together in the left-to-right direction, and the second left-to-right translation seats, the second front-to-back translation seats, and the second opening mechanism also move together in the left-to-right direction. After adjusting the distance between the first and second opening mechanisms, the first and second front-to-back translation seats and the translation seat crossbar are fixed by locking components (such as bolts or screws) so that the front-to-back translation mechanism can drive the translation seat crossbar, the first and second front-to-back translation seats, and the second front-to-back translation seats to move back and forth together more smoothly.

[0022] In another preferred embodiment, the aforementioned forward and backward translation mechanism includes a first forward and backward translation drive device capable of driving a first forward and backward translation seat to move forward and backward relative to a first left and right translation seat, and a second forward and backward translation drive device capable of driving a second forward and backward translation seat to move forward and backward relative to a second left and right translation seat. The first forward and backward translation drive device is mounted on the first left and right translation seat, and the second left and right translation seat is mounted on the second left and right translation seat. The first and second forward and backward translation drive devices can be cylinders, with the piston rod of the cylinder facing forward or backward, and the piston rod of the cylinder connected to the first and second forward and backward translation seats. The first and second forward and backward translation drive devices can also be structures that use a motor in conjunction with a synchronous belt (or chain, gear / rack, nut / screw).

[0023] In the preferred embodiment, both the first and second opening mechanisms include an opening mechanism bracket, a swing shaft, a movable seat, an upper opening plate, a lower opening plate, an opening and closing shaft, a first opening and closing connecting rod, and a second opening and closing connecting rod. The swing shaft is rotatably mounted on the opening mechanism bracket and runs vertically. The movable seat is mounted on the swing shaft. The opening and closing shaft is rotatably mounted on the movable seat and is arranged horizontally. The rear end of the upper opening plate is connected to the opening and closing shaft, and the rear end of the lower opening plate is connected to the movable seat. The first end of the first opening and closing connecting rod is connected to the opening and closing shaft, and the second end of the first opening and closing connecting rod is hinged to the first end of the second opening and closing connecting rod. The second end of the second opening and closing connecting rod is hinged to the opening mechanism bracket. The opening mechanism bracket is provided with a swing mechanism capable of driving the swing shaft to rotate. The first opening mechanism is mounted on the first left and right translation seats via its opening mechanism bracket, and the second opening mechanism is mounted on the second left and right translation seats via its opening mechanism bracket (in the case where the bag opening device also includes the first front and rear translation seats, the second front and rear translation seats, and the front and rear translation mechanism, the first opening mechanism is mounted on the first front and rear translation seats via its opening mechanism bracket, and the second opening mechanism is mounted on the second front and rear translation seats via its opening mechanism bracket).

[0024] When the bag opening mechanism described above is working, in the initial state, the upper and lower opening plates of the first and second opening mechanisms are close to each other. After the bag feeding device delivers the packaging bag to the bottom of the adsorption device, and the adsorption device lifts the upper side of the packaging bag to open the bag opening, the upper and lower opening plates of the first and second opening mechanisms are inserted forward into the bag opening. Driven by the swing mechanism, they simultaneously swing outward around the swing axis, causing the bag opening to open to the left and right. At the same time, due to the outward swing of the movable seat around the swing axis, the position of the first end of the first opening and closing link changes (for example, it becomes closer to the second end of the second opening and closing link). Thus, under the pushing action of the second opening and closing link, the second end of the first opening and closing link swings around the opening and closing axis. The opening and closing axis rotates, thereby driving the front end of the upper opening plate to swing upward. The distance between the front end of the upper opening plate and the front end of the lower opening plate increases, causing the bag opening to open in the up and down direction, thereby opening the bag opening to a suitable width and height.

[0025] In a more preferred embodiment, the second end of the first opening and closing link is hinged to the first end of the second opening and closing link via a first ball joint, and the second end of the second opening and closing link is hinged to the support of the opening mechanism via a second ball joint.

[0026] In a more preferred embodiment, the second opening and closing link is an adjustable length member.

[0027] In a further preferred embodiment, the aforementioned second opening / closing linkage includes a first connecting screw, a second connecting screw, and an internally threaded tube. The first and second connecting screws are each provided with external threads in opposite directions. The internally threaded tube has internal threads at both ends that match the first and second connecting screws. The end of the first connecting screw is hinged to the second end of the first opening / closing linkage, and the end of the second connecting screw is hinged to the support of the opening mechanism. More preferably, the internally threaded tube has two symmetrical notches in its middle section, which can be used with tools such as wrenches. When the length of the second opening / closing linkage needs to be adjusted, the two sides of the wrench opening are respectively inserted into these two notches, and then the internally threaded tube can be turned to adjust the length of the second opening / closing linkage.

[0028] As a first preferred embodiment of the swing mechanism, the aforementioned swing mechanism includes a swing cylinder and a first swing connecting rod. The cylinder body of the swing cylinder is hinged to the support of the opening mechanism. The first end of the first swing connecting rod is connected to the swing shaft or the movable seat, and the second end of the first swing connecting rod is hinged to the piston rod of the swing cylinder. When the piston rod of the swing cylinder extends or retracts, it drives the swing shaft to rotate through the first swing connecting rod, thereby realizing the swinging of the movable seat and the upper and lower opening bags.

[0029] As a second preferred embodiment of the swing mechanism, the aforementioned swing mechanism includes a swing cylinder, a first swing connecting rod, a second swing connecting rod, and a third swing connecting rod. The cylinder body of the swing cylinder is hinged to the support of the opening mechanism. The piston rod of the swing cylinder is provided with a hinge seat, and the hinge seat is provided with a pin. The first end of the first swing connecting rod is connected to the swing shaft or the movable seat, and the second end of the first swing connecting rod is hinged to the first end of the second swing connecting rod. The second end of the second swing connecting rod is provided with a circular pin hole that matches and fits with the pin. The first end of the third swing connecting rod is hinged to the support of the opening mechanism, and the second end of the third swing connecting rod is provided with a circular pin hole that matches and fits with the pin. When the piston rod of the swing cylinder extends or retracts, it drives the swing shaft to rotate through the second and first swing connecting rods, thereby realizing the swing of the movable seat and the upper and lower opening bag plates. The third swing connecting rod is used to move the hinge seat and the pin along a predetermined trajectory.

[0030] A more preferred embodiment of the second preferred embodiment of the swing mechanism is provided on the support of the aforementioned opening mechanism, with the limit block located directly in front of the hinge seat. When the piston rod of the swing cylinder extends, it reaches the predetermined stroke and stops moving forward when the hinge seat contacts the limit block. This allows for more precise control over the left and right swing angles of the upper and lower opening bags, as well as the upward swing angle of the upper opening bag. Preferably, the position of the limit block in the front-rear direction is adjustable.

[0031] In a more preferred embodiment, the aforementioned opening mechanism support is provided with a bag opening edge clamping plate, which is located outside the upper opening plate. A clamping gap exists between the front end of the bag opening edge clamping plate and the outer side of the upper opening plate. When the upper and lower opening plates of the first and second opening mechanisms are inserted forward into the bag opening of the packaging bag, the left and right sides of the bag opening edges enter the clamping gaps of the first and second opening mechanisms, respectively. After the upper opening plate swings outward under the drive of the swing mechanism, while the bag opening opens to the left and right, the outer side of the upper opening plate and the front end of the bag opening edge clamping plate together clamp the bag opening edges in the clamping gaps, keeping the bag opening position stable. This facilitates the smooth pushing of the sheet material into the innermost part of the packaging bag by the subsequent pusher mechanism, and also helps to make the sheet material in the packaging bag more compact.

[0032] In a further preferred embodiment, a rubber-coated screw is installed at the front end of the aforementioned bag opening edge clamping plate. The head of the rubber-coated screw is located on the side of the bag opening edge clamping plate facing the upper opening plate, and a clamping gap exists between the head of the rubber-coated screw and the outer surface of the upper opening plate. The head of the rubber-coated screw is covered with an elastic material (such as polyurethane) to cushion the impact and increase the coefficient of friction. When the upper opening plate swings outward under the drive of the swing mechanism, the outer surface of the upper opening plate and the head of the rubber-coated screw together clamp the bag opening edge.

[0033] In a further preferred embodiment, the front end of the bag opening edge clamping plate is provided with a strip-shaped limiting hole. The screw portion of the rubber-coated screw passes through the strip-shaped limiting hole, and a locking nut is installed on the screw portion. The locking nut and the head of the rubber-coated screw together clamp the front end of the bag opening edge clamping plate. By adjusting the position of the screw portion of the rubber-coated screw in the strip-shaped limiting hole, the position of the head of the rubber-coated screw can be adjusted, thereby adjusting the clamping position of the bag opening edge. The strip-shaped limiting hole can be vertically oriented, allowing the height of the head of the rubber-coated screw to be adjustable.

[0034] In another, further preferred embodiment, the front end of the aforementioned bag opening edge clamping plate is provided with a screw hole, in which the screw portion of the rubber-coated screw is screwed. By adjusting the screw depth of the screw portion, the initial gap between the head of the rubber-coated screw and the outer side of the upper opening plate can be adjusted, thereby adjusting the clamping force when the outer side of the upper opening plate and the head of the rubber-coated screw jointly clamp the bag opening edge.

[0035] Typically, the front end of the bag opening edge clamping plate is located behind the front end of the upper opening plate.

[0036] In a preferred embodiment, the aforementioned material compression device includes a compression mechanism, a lifting platform, and a lifting mechanism for the lifting platform; the lifting mechanism for the lifting platform is mounted on a frame; the lifting platform is mounted on the power output end of the lifting mechanism for the lifting platform; the compression mechanism includes a third left-right sliding seat, a fourth left-right sliding seat, a first push plate, a second push plate, and a push plate drive mechanism capable of driving the third left-right sliding seat and the fourth left-right sliding seat to move closer to or further away from each other in the left-right direction, the push plate drive mechanism is mounted on the frame, and both the third left-right sliding seat and the fourth left-right sliding seat are movably mounted on the lifting platform; the first push plate is mounted on the upper end of the third left-right sliding seat, and the second push plate is mounted on the upper end of the fourth left-right sliding seat.

[0037] When the material compression device is working, the compression mechanism is lifted by a lifting platform installed between the stacker crane and the bag opening device. When the lifting platform reaches its lowest point, it is on the same horizontal plane as the stacker crane. The pusher plate drive mechanism pulls the third left-right sliding seat and the first pusher plate to the left, and the fourth left-right sliding seat and the second pusher plate to the right, opening the first and second pusher plates and creating a space between them to accommodate the stacked sheet material. The stacker crane pushes the stacked sheet material between the first and second pusher plates on the lifting platform, completing the receiving process. When the lifting platform rises, the third and fourth left-right sliding seats rise synchronously with it; simultaneously, the pusher plate drive mechanism activates, driving the first and second pusher plates to move towards each other, applying pressure to compress the stacked sheet material. When the lifting platform reaches its highest point, driven by the lifting mechanism, it is on the same horizontal plane as the bag-opening device. The pusher device then pushes the compressed stack of sheet material directly from the compression mechanism into the bag-opening device and into the packaging bag. Subsequently, the pusher drive mechanism opens the first and second pushers, and the lifting platform descends to its reset position, starting the next cycle. By fixing the compression motor, screw, and other components to the frame, the lifting platform only carries the sheet material and the translation seat, reducing the weight of the lifting components, increasing the speed of the lifting action, and making the lifting smoother, which is beneficial to improving production efficiency.

[0038] In a more preferred embodiment, the pusher drive mechanism includes a fifth left-right translation seat and a sixth left-right translation seat. A second left-right translation mechanism is provided on the frame, capable of driving the fifth and sixth left-right translation seats to move closer or further apart in the left-right direction. A third left-right translation seat has a first vertically oriented lifting guide rail; the fifth left-right translation seat has a first guide groove that slides with the first lifting guide rail; the fourth left-right translation seat has a second vertically oriented lifting guide rail; and the sixth left-right translation seat has a second guide groove that slides with the second lifting guide rail. When the lifting platform mechanism drives the lifting platform to rise or fall, the first and second lifting guide rails are respectively located in the first and second guide grooves, and the first lifting guide rail moves up and down along the first guide groove, while the second lifting guide rail moves up and down along the second guide groove.

[0039] In a further preferred embodiment, the second left-right translation mechanism includes a first compression motor, a first compression translation screw, a first compression translation nut, a second compression motor, a second compression translation screw, and a second compression translation nut. The first and second compression motors are both mounted on the frame. The first and second compression translation screws are rotatably mounted on the frame and are both arranged in a left-right direction. The first compression motor is driven by the first compression translation screw, and the second compression motor is driven by the second compression translation screw. The first and second compression translation nuts are respectively fitted onto the first and second compression translation screws and are respectively connected to the fifth and sixth left-right translation seats. The aforementioned second left-right translation mechanism can also employ a single compressor motor and a single screw structure. In this case, the screw should have forward and reverse thread sections, with the first and second compression translation nuts respectively fitted onto the forward and reverse thread sections of the screw. Alternatively, the aforementioned second left-right translation mechanism can employ two opposing compression cylinders.

[0040] In a further preferred embodiment, the frame is provided with a first translation guide rail running left and right, the fifth left and right translation seat is provided with a first translation slider that slides along the first translation guide rail, and the sixth left and right translation seat is provided with a second translation slider that slides along the first translation guide rail. When the fifth and sixth left and right translation seats move, the first and second translation sliders slide along the first translation guide rail of the frame to ensure stable translation of the fifth and sixth left and right translation seats.

[0041] In a more preferred embodiment, the lifting platform is provided with a second translation guide rail running left and right, the third left and right translation seat is provided with a third translation slider that slides in cooperation with the second translation guide rail, and the fourth left and right translation seat is provided with a fourth translation slider that slides in cooperation with the second translation guide rail. When the third left and right translation seats and the fourth left and right translation seats move, the third translation slider and the fourth translation slider slide along the second translation guide rail of the lifting platform to ensure stable translation of the third left and right translation seats and the fourth left and right translation seats.

[0042] In a more preferred embodiment, the lifting mechanism of the lifting platform includes a lifting drive motor, a transmission shaft, a first swing arm, a second swing arm, a fifth link, and a sixth link. The lifting drive motor is mounted on the frame, and the transmission shaft is rotatably mounted on the frame in a horizontal direction, with the transmission shaft being connected to the lifting drive motor. The fixed ends of the first and second swing arms are respectively mounted on both ends of the transmission shaft. The upper end of the fifth link is hinged to the lifting platform, and the lower end of the fifth link is hinged to the movable end of the first swing arm. The upper end of the sixth link is hinged to the lifting platform, and the lower end of the sixth link is hinged to the movable end of the second swing arm. The lifting mechanism of the lifting platform consists of a lifting drive motor, a transmission shaft, a first swing arm, a second swing arm, a fifth link, and a sixth link. The lifting drive motor drives the transmission shaft to rotate, which in turn drives the first and second swing arms to rotate synchronously around the transmission shaft (they can swing back and forth at a certain angle). This, in turn, drives the lifting platform to move up and down through the fifth and sixth links. As the lifting drive motor rotates, the lifting platform makes periodic up and down movements, which are coordinated with the rhythm of the stacker crane and the pusher device, thereby improving work efficiency.

[0043] In a further preferred embodiment, the lifting mechanism of the lifting platform further includes a third lifting guide rail and a fourth lifting guide rail. Both the third and fourth lifting guide rails are mounted on the lifting platform and run vertically. The frame is provided with a third guide groove and a fourth guide groove, both running vertically. The third and fourth lifting guide rails are respectively located within the third and fourth guide grooves, and the third lifting guide rail can move vertically along the third guide groove, while the fourth lifting guide rail can move vertically along the fourth guide groove. When the lifting platform rises / falls, the third and fourth lifting guide rails slide along the guide grooves of the frame, ensuring smooth lifting of the platform.

[0044] In a further preferred embodiment, the lifting mechanism of the lifting platform also includes a first support plate and a second support plate, both of which are mounted on the lifting platform. The third and fourth lifting guide rails are respectively mounted on the first and second support plates. Both the first and second support plates are provided with upper and lower limit blocks. The outer walls of the third and fourth guide grooves are each provided with stops, each stop positioned between its corresponding upper and lower limit blocks. When the lifting platform rises to its highest point, the upper limit blocks of each support plate contact the stops of the corresponding guide grooves, stopping the platform's ascent. When the lifting platform descends to its lowest point, the lower limit blocks of each support plate contact the stops of the corresponding guide grooves, stopping the platform's descent. This accurate control of positioning precision ensures flush alignment with the stacker crane and bag-opening device.

[0045] In a more preferred embodiment, both the first and second push plates have internal ventilation chambers, and the inner surfaces of both the first and second push plates have multiple ventilation holes communicating with the ventilation chambers. The frame is equipped with a compressed air source, the outlet of which communicates with the ventilation chambers. This creates a pressure surface on the first and second push plates, reducing friction between them. Since the surface of the sheet material is mostly non-woven fabric, it easily adheres to the push plates during compression. The compressed air source supplies air to the ventilation chambers and ventilation holes, creating a uniform pressure surface (slight positive pressure) on the inner surfaces of the first and second push plates. This generates a fine air film gap between the sheet material and the first and second push plates, reducing friction and ensuring that the sheet material does not move with the push plates when they open after compression, thus guaranteeing neat stacking.

[0046] This invention mainly improves the bag opening device and the material compression device. The bag feeding device, sealing device, and pusher mechanism can adopt existing technologies. For example, the bag feeding device, sealing device, and pusher mechanism can respectively adopt the bag feeding device, packaging sealing and cutting device, and pusher mechanism of the fully automatic diaper packaging production line disclosed in Chinese Invention Application No. CN104843248A.

[0047] In this invention, the bag opening device drives the first left and right translation seats and the second left and right translation seats to move closer or further apart in the left and right directions through the first left and right translation mechanism. This allows for the adjustment of the distance between the first and second opening mechanisms, the distance between the first and second feeding plates, and the distance between the two suction nozzles in one operation. This ensures that the distance between corresponding components on the left and right sides meets production requirements. The adjustment of the distance between corresponding components on the left and right sides is carried out synchronously, making the adjustment process convenient and quick, and simplifying the operation for workers. Attached Figure Description

[0048] Figure 1This is a schematic diagram (top view) of the preferred embodiment 1 of the present invention.

[0049] Figure 2 This is a schematic diagram of the bag opening device in the preferred embodiment 1 of the present invention (with a large left-right spacing).

[0050] Figure 3 This is a schematic diagram of the bag opening device in the preferred embodiment 1 of the present invention (with a small left-right spacing).

[0051] Figure 4 yes Figure 2 The top view of the bag opening device shown (the state when the material support plate 444 is removed, and the front and rear translation mechanism drives the first opening mechanism 45 and the second opening mechanism 46 to be inserted forward into the bag opening of the packaging bag).

[0052] Figure 5 yes Figure 2 Top view of the bag opening device shown (state when the material support plate 444 is removed and the front and rear translation mechanism drives the first opening mechanism 45 and the second opening mechanism 46 to move backward).

[0053] Figure 6 This is a schematic diagram of the locking structure in preferred embodiment 1 of the present invention;

[0054] Figure 7 yes Figure 2 A schematic diagram of the first spreading mechanism (initial state);

[0055] Figure 8 yes Figure 2 A schematic diagram of the first opening mechanism (the state of the packaging bag opening);

[0056] Figure 9 This is a schematic diagram of the structure of the rubber-coated screw installed on the clamping plate at the edge of the bag opening in the preferred embodiment 1 of the present invention;

[0057] Figure 10 This is a schematic diagram (perspective view) of the material compression device in preferred embodiment 1 of the present invention.

[0058] Figure 11 This is a schematic diagram of the material compression device in preferred embodiment 1 of the present invention (a perspective view from another angle).

[0059] Figure 12 for Figure 10 A schematic diagram of the structure of the first push plate.

[0060] Figure 13 This is a schematic diagram of the structure of the rubber-coated screw installed on the clamping plate at the edge of the bag opening in the preferred embodiment 2 of the present invention. Detailed Implementation

[0061] Example 1, as Figure 1 As shown, this simple packaging machine includes a frame 1, a material compression device 2, a bag feeding device 3, a bag opening device 4, a sealing device 5, and a pusher mechanism (not shown in the figure). The material compression device 2, the bag opening device 4, and the sealing device 5 are arranged sequentially on the frame 1. The pusher mechanism is located above the material compression device 2, and the bag feeding device 3 is located on one side of the bag opening device 4.

[0062] like Figures 2 to 5 As shown, the bag opening device 4 includes a bag opening base 42, an adsorption device, a first feed plate 43, a second feed plate 44, a first opening mechanism 45, a second opening mechanism 46, a first left-right sliding seat 47, and a second left-right sliding seat 48. The bag opening base 42 is mounted on the frame 1. The first feed plate 43 and the second feed plate 44 are arranged side by side, and the first opening mechanism 45 and the second opening mechanism 46 are also arranged side by side. The adsorption device includes a first suction nozzle 49, a second suction nozzle 410, and a device capable of driving the two suction nozzles (i.e., the first suction nozzle 49 and the second suction nozzle 410). The suction nozzle lifting mechanism for the second suction nozzle (410) is arranged with the first suction nozzle 49 and the second suction nozzle 410 side by side. The opening base 42 is provided with a first left-right translation mechanism that can drive the first left-right translation seat 47 and the second left-right translation seat 48 to move closer or further apart in the left-right direction. The first feeding plate 43, the first opening mechanism 45, and the first suction nozzle 49 are all installed on the first left-right translation seat 47, and the second feeding plate 44, the second opening mechanism 46, and the second suction nozzle 410 are all installed on the second left-right translation seat 48.

[0063] In this embodiment, the suction nozzle lifting mechanism includes a suction nozzle crossbar 411, a first suction nozzle slider 412, a second suction nozzle slider 413, a first suction nozzle upright 414, a second suction nozzle upright 415, a first upright guide block 416, and a second upright guide block 417. A suction nozzle crossbar lifting drive mechanism capable of driving the suction nozzle crossbar 411 to rise and fall is provided on the frame 1. A left-right oriented suction nozzle transverse guide rail 418 is provided on the suction nozzle crossbar 411. The first suction nozzle slider 412 and the second suction nozzle slider 413 are both mounted on the suction nozzle transverse guide rail 418 and can move along it. The first suction nozzle upright 414 is connected to the first suction nozzle slider 412. The first suction nozzle 49 is mounted on the upper end of the first suction nozzle upright 414. The second suction nozzle upright 415 is connected to the second suction nozzle slider 413. The second suction nozzle 410 is installed on the upper end of the second suction nozzle upright 415; the first upright guide block 416 is installed on the first left and right translation seat 47, and the first upright guide block 416 is provided with a first upright guide groove 419 (or a first upright guide hole) running vertically, the first suction nozzle upright 414 is located in the first upright guide groove 419 (or the first upright guide hole), and the first suction nozzle upright 414 can be raised and lowered relative to the first upright guide block 416; the second upright guide block 417 is installed on the second left and right translation seat 48, and the second upright guide block 417 is provided with a second upright guide groove 420 (or a second upright guide hole) running vertically, the second suction nozzle upright 415 is located in the second upright guide groove 420 (or the second upright guide hole), and the second suction nozzle upright 415 can be raised and lowered relative to the second upright guide block 417. A suction nozzle crossbar lifting drive mechanism is used to drive the suction nozzle crossbar 411 to rise and fall, thereby driving the first suction nozzle upright 414 and the second suction nozzle upright 415 to rise and fall simultaneously through the first suction nozzle slider 412 and the second suction nozzle slider 413 respectively. The first suction nozzle upright 414 and the second suction nozzle upright 415 drive the first suction nozzle 49 and the second suction nozzle 410 to rise and fall simultaneously. When the first left-right translation seat 47 moves in the left-right direction, it applies a force to the first suction nozzle upright 414 through the inner wall of the first upright guide groove 419 (or the first upright guide hole), causing the first suction nozzle upright 414, the first suction nozzle 49, and the first suction nozzle slider 412 to move together; when the second left-right translation seat 48 moves in the left-right direction, it applies a force to the second suction nozzle upright 415 through the inner wall of the second upright guide groove (or the second upright guide hole), causing the second suction nozzle upright 415, the second suction nozzle 410, and the second suction nozzle slider 413 to move together.After adjusting the distance between the first left and right sliding seat 47 and the second left and right sliding seat 48, that is, after adjusting the distance between the first suction nozzle and the second suction nozzle, the first suction nozzle slider, the second suction nozzle slider and the suction nozzle crossbar can be fixed together by locking components (such as bolts or screws), so that the suction nozzle crossbar lifting drive mechanism can drive the suction nozzle crossbar, the first suction nozzle slider, the second suction nozzle slider, the first suction nozzle upright, the second suction nozzle upright, the first suction nozzle, the second suction nozzle and so on to rise and fall together more smoothly.

[0064] The aforementioned suction nozzle crossbar lifting drive mechanism includes a suction nozzle crossbar lifting drive motor 421, a first rotating shaft 422, a first connecting rod 423, and a second connecting rod 424. The first rotating shaft 422 is rotatably mounted on the frame 1 and is arranged in a horizontal direction. One end of the first connecting rod 423 is connected to the first rotating shaft 422, and the other end of the first connecting rod 423 is hinged to one end of the second connecting rod 424. The other end of the second connecting rod 424 is hinged to the suction nozzle crossbar 411 (in this embodiment, a vertical connecting rod 425 is fixedly installed on the suction nozzle crossbar 411, and the other end of the second connecting rod 424 is hinged to the connecting rod 425). The power output shaft of the suction nozzle crossbar lifting drive motor 421 is connected to the first rotating shaft 422 for transmission. The aforementioned suction nozzle crossbar lifting drive mechanism can also adopt a cylinder, or a structure in which a motor and a synchronous belt (or chain, gear / rack, nut / screw) cooperate.

[0065] In this embodiment, the first left-right translation mechanism includes a first bag-opening translation guide rail 426, a bag-opening translation screw 427, and two bag-opening translation nuts 428. The first bag-opening translation guide rail 426 is disposed on the bag-opening base 42 and extends in the left-right direction. The first left-right translation seat 47 and the second left-right translation seat 48 are respectively provided with a first slider 429 that slides in cooperation with the first bag-opening translation guide rail 426. The bag-opening translation screw 427 is rotatably mounted on the bag-opening base 42 in the horizontal direction. The bag-opening translation screw 427 is provided with a first forward thread section and a first reverse thread section. The two bag-opening translation nuts 428 are respectively screwed into the first forward thread section and the first reverse thread section. The two bag-opening translation nuts 428 are respectively connected to the first left-right translation seat 47 and the second left-right translation seat 48. There are usually multiple (such as two or three) first bag opening translation guide rails 426, and each first bag opening translation guide rail 426 is parallel to each other; there are multiple first sliders 429 on the first left and right translation seat 47, and each first bag opening translation guide rail 426 corresponds to one or more first sliders 429 on the first left and right translation seat 47; there are multiple first sliders 429 on the second left and right translation seat 48, and each first bag opening translation guide rail 426 corresponds to one or more first sliders 429 on the second left and right translation seat 48. By rotating the bag-opening translation screw 427, the two bag-opening translation nuts 428 can be driven to move closer or further apart, thereby causing the first left-right translation seat 47 and the second left-right translation seat 48 to move closer or further apart. In this embodiment, the first left-right translation mechanism also includes a left-right translation drive motor 430 and a first adjusting handwheel 431. The left-right translation drive motor 430 is mounted on the bag-opening base 42, one end of the bag-opening translation screw 427 is connected to the power output shaft of the left-right translation drive motor 430, and the first adjusting handwheel 431 is mounted on the other end of the bag-opening translation screw 427. The left-right translation drive motor 430 can be used for driving, or the first adjusting handwheel 431 can be manually rotated to make the bag-opening translation screw 427 rotate forward or backward.

[0066] The first left-right sliding seat 47 and the second left-right sliding seat 48 are respectively provided with locking structures 432 that cooperate with the first opening sliding guide rail 426 (when there are multiple first opening sliding guide rails 426, the locking structure 432 cooperates with one of the first opening sliding guide rails 426). When the locking structure 432 is locked, it is fixed in position with the corresponding first opening sliding guide rail 426, thereby fixing the positions of the first left-right sliding seat 47 and the second left-right sliding seat 48. (Reference) Figure 6The locking structure 432 includes a locking slider 4321, a locking bolt 4322, and a locking nut 4323. The locking slider 4321 includes a front clamping part 43211 and a rear clamping part 43212. The upper end of the front clamping part 43211 and the upper end of the rear clamping part 43212 are integrated. There is a gap 4324 between the middle of the front clamping part 43211 and the middle of the rear clamping part 43212. The lower part of the front clamping part 43211 and the lower part of the rear clamping part 43212 are respectively provided with a guide for the first bag opening translation. The guide rail 426 has a matching groove 4325. The front clamping part 43211 has a front through hole 4326 running in the middle, and the rear clamping part 43212 has a rear through hole 4327 running in the middle. The front through hole 4326 and the rear through hole 4327 are aligned with each other. The rod part 43221 of the locking bolt 4322 passes through the front through hole 4326 and the rear through hole 4327. The head 43222 of the locking bolt 4322 and the locking nut 4323 are located on the front and rear sides of the locking slider 4321, respectively. When the first left and right translation seats 47 and the second left and right translation seats 48 are in the required positions, tighten the connection between the locking bolt 4322 and the locking nut 4323 so that the head of the locking bolt 4322 and the locking nut 4323 together apply clamping force to the middle of the front clamping part 43211 and the middle of the rear clamping part 43212. At this time, the gap 4324 narrows, and the groove wall of the sliding groove 4325 at the lower part of the front clamping part 43211 and the lower part of the rear clamping part 43212 clamps the corresponding first bag opening translation guide rail 426, so that the locking structure 432 and the first left and right translation seats 47 (or the second left and right translation seats 48) are fixed with the corresponding first bag opening translation guide rail 426, so that the positions of the first left and right translation seats 47 and the second left and right translation seats 48 on the bag opening base 42 remain unchanged in subsequent work. When it is necessary to adjust the position of the first left and right translation seat 47 and the second left and right translation seat 48, loosen the connection between the locking bolt 4322 and the locking nut 4323 so that the head of the locking bolt 4322 and the locking nut 4323 no longer apply clamping force to the middle of the front clamping part 43211 and the middle of the rear clamping part 43212. At this time, the groove wall of the slide groove 4325 at the lower part of the front clamping part 43211 and the lower part of the rear clamping part 43212 no longer clamps the corresponding first bag opening translation guide rail 426, so that the locking structure 432 can move along the first bag opening translation guide rail 426 with the first left and right translation seat 47 (or the second left and right translation seat 48). For ease of operation, a handle 4328 is provided on the head 43222 of the locking bolt 4322, and the locking nut 4323 is fixedly installed on the outer wall of the locking slider 4321 (for example, the locking nut 4323 is welded to the rear outer wall of the locking slider 4321). When the handle 4328 is turned, the locking bolt 4322 rotates accordingly.

[0067] In this embodiment, the bag opening device further includes a first front-to-back translation seat 433, a second front-to-back translation seat 434, and a front-to-back translation mechanism. The front-to-back translation mechanism can drive the first front-to-back translation seat 433 and the second front-to-back translation seat 434 to translate back and forth relative to the first left-to-right translation seat 47 and the second left-to-right translation seat 48, respectively. A first opening mechanism 45 is installed on the first front-to-back translation seat 433, and a second opening mechanism 46 is installed on the second front-to-back translation seat 434. During the production process, after the adsorption device sucks up the upper side of the packaging bag to open the bag opening, the first opening mechanism 45 and the second opening mechanism 46, driven by the front-to-back translation mechanism, insert forward into the bag opening of the packaging bag, and then open the bag opening to a suitable width and height. After the material is filled into the packaging bag, the first opening mechanism 45 and the second opening mechanism 46, driven by the front-to-back translation mechanism, move backward and withdraw from the bag opening of the packaging bag.

[0068] Both the first left-right translation seat 47 and the second left-right translation seat 48 are equipped with a second bag-opening translation guide rail 435, which extends in the front-back direction. The first front-back translation seat 433 is equipped with a second slider 436 that mates with the second bag-opening translation guide rail 435 on the first left-right translation seat 47, and the second front-back translation seat 434 is equipped with a second slider 436 that mates with the second bag-opening translation guide rail 435 on the second left-right translation seat 48. (Reference) Figure 4 and Figure 5 The front-to-back translation mechanism includes a front-to-back translation drive motor 437, a second rotating shaft 438, a third connecting rod 439, a fourth connecting rod 440, and a translation seat crossbar 441. The second rotating shaft 438 is rotatably mounted on the bag-opening base 42. One end of the third connecting rod 439 is connected to the second rotating shaft 438, and the other end of the third connecting rod 439 is hinged to one end of the fourth connecting rod 440. The other end of the fourth connecting rod 440 is hinged to the translation seat crossbar 441. The power output shaft of the front-to-back translation drive motor 437 is connected to the second rotating shaft 438. The first front-to-back translation seat 433 and the second front-to-back translation seat 434 are connected to the translation seat crossbar 441.

[0069] The relative positions of the first front-to-back translation seat 433, the second front-to-back translation seat 434 and the translation seat crossbar 441 are adjustable. In this embodiment, the translation seat crossbar 441 is provided with a third bag-opening translation guide rail 442 that runs left and right. The first front-to-back translation seat 433 and the second front-to-back translation seat 434 are respectively provided with a third slider 443 that cooperates with the third bag-opening translation guide rail 442. When it is necessary to adjust the distance between the first opening mechanism 45 and the second opening mechanism 46, the third slider 443 on the first front-back translation seat 433 and the third slider 443 on the second front-back translation seat 434 can move along the third bag opening translation guide rail 442. At this time, the first left-right translation seat 47, the first front-back translation seat 433, and the first opening mechanism 45 move together in the left-right direction, and the second left-right translation seat 48, the second front-back translation seat 434, and the second opening mechanism 46 also move together in the left-right direction. After adjusting the distance between the first opening mechanism 45 and the second opening mechanism 46, the first front-back translation seat 433, the second front-back translation seat 434 and the translation seat crossbar 441 are fixed together by locking components (such as bolts or screws), so that the front-back translation mechanism can smoothly drive the translation seat crossbar 441, the first front-back translation seat 433, and the second front-back translation seat 434 to move back and forth together.

[0070] like Figure 7 and Figure 8 As shown ( Figure 7 and Figure 8 The structure of the first opening mechanism 45 is shown. The structure of the second opening mechanism 46 is the same as that of the first opening mechanism 45 (the first opening mechanism 45 and the second opening mechanism 46 are symmetrical from left to right). Both the first opening mechanism 45 and the second opening mechanism 46 include an opening mechanism bracket 451, a swing shaft 452, a movable seat 453, an upper opening plate 454, a lower opening plate 455, an opening and closing shaft 456, a first opening and closing connecting rod 457, and a second opening and closing connecting rod 458. The swing shaft 452 is rotatably mounted on the opening mechanism bracket 451 and runs vertically. The movable seat 453 is mounted on... On the swing shaft 452, the opening and closing shaft 456 is rotatably mounted on the movable seat 453 and arranged horizontally. The rear end of the upper opening plate 454 is connected to the opening and closing shaft 456, and the rear end of the lower opening plate 455 is connected to the movable seat 453. The first end of the first opening and closing connecting rod 457 is connected to the opening and closing shaft 456, and the second end of the first opening and closing connecting rod 457 is hinged to the first end of the second opening and closing connecting rod 458. The second end of the second opening and closing connecting rod 458 is hinged to the opening mechanism bracket 451. The opening mechanism bracket 451 is provided with a swing mechanism that can drive the swing shaft 452 to rotate. In this embodiment, the first opening mechanism 45 is mounted on the first front and rear translation seat 433 through its opening mechanism bracket 451, and the second opening mechanism 46 is mounted on the second front and rear translation seat 434 through its opening mechanism bracket 451.

[0071] In this embodiment, the second end of the first opening and closing link 457 is hinged to the first end of the second opening and closing link 458 via the first ball joint 459, and the second end of the second opening and closing link 458 is hinged to the support bracket 451 of the opening mechanism via the second ball joint 4510.

[0072] In this embodiment, the second opening / closing link 458 is an adjustable length rod. The second opening / closing link 458 includes a first connecting screw 4581, a second connecting screw 4582, and an internally threaded tube 4583. The first connecting screw 4581 and the second connecting screw 4582 are respectively provided with external threads in opposite directions. The two ends of the internally threaded tube 4583 are respectively provided with internal threads that match those of the first connecting screw 4581 and the second connecting screw 4582. The end of the first connecting screw 4581 is hinged to the second end of the first opening / closing link 457, and the end of the second connecting screw 4582 is hinged to the support bracket 451 of the opening mechanism. The internally threaded tube 4583 has two symmetrical notches 4584 in its middle section, which can be used with tools such as wrenches. When the length of the second opening / closing link 458 needs to be adjusted, the two sides of the wrench opening are respectively inserted into the two notches 4584, and then the internally threaded tube 4583 can be turned to adjust the length of the second opening / closing link 458.

[0073] The aforementioned swing mechanism includes a swing cylinder 4511, a first swing connecting rod 4512, a second swing connecting rod 4513, and a third swing connecting rod 4514. The cylinder body of the swing cylinder 4511 is hinged to the support bracket 451 of the spreading mechanism. A hinge seat 4515 is provided on the piston rod of the swing cylinder 4511, and a pin 4516 is provided on the hinge seat 4515. The first end of the first swing connecting rod 4512 is connected to the swing shaft 452 (or the movable seat 453), and the second end of the first swing connecting rod 4512 is connected to the third end of the second swing connecting rod 4514. One end is hinged. The second end of the second swing link 4513 is provided with a circular pin hole that matches and fits with the pin 4516 (this structure enables the second end of the second swing link 4513 to be hinged with the hinge seat 4515). The first end of the third swing link 4514 is hinged to the support bracket 451 of the opening mechanism. The second end of the third swing link 4514 is provided with a circular pin hole that matches and fits with the pin 4516 (this structure enables the second end of the third swing link 4514 to be hinged with the hinge seat 4515). When the piston rod of the swing cylinder 4511 extends and retracts, it drives the swing shaft 452 to rotate through the second swing link 4513 and the first swing link 4512, thereby realizing the swing of the movable seat 453, the upper opening bag plate 454, and the lower opening bag plate 455; the third swing link 4514 is used to move the hinge seat 4515 and the pin 4516 along a predetermined trajectory.

[0074] A limiting block 4517 is provided on the support bracket 451 of the opening mechanism, and the limiting block 4517 is located directly in front of the hinge seat 4515. When the piston rod of the swing cylinder 4511 extends, the hinge seat 4515 reaches the predetermined stroke and stops moving forward when it contacts the limiting block 4517. This allows for more precise control of the left and right swing angles of the upper opening plate 454 and the lower opening plate 455, as well as the upward swing angle of the upper opening plate 454. Preferably, the position of the limiting block 4517 in the front-rear direction is adjustable.

[0075] In this embodiment, the opening mechanism bracket 451 is provided with a bag opening edge clamping plate 4518, which is located outside the upper opening plate 454. A clamping gap 4519 exists between the front end of the bag opening edge clamping plate 4518 and the outer side surface 4541 of the upper opening plate 454. (Reference) Figure 9 A rubber-coated screw 4520 is installed at the front end of the bag opening edge clamping plate 4518. The head 4521 of the rubber-coated screw 4520 is located on the side of the bag opening edge clamping plate 4518 facing the upper opening plate 454. A clamping gap 4519 is formed between the head 4521 of the rubber-coated screw 4520 and the outer side 4541 of the upper opening plate 454. The head of the rubber-coated screw 4520 is covered with an elastic material 4522 (such as polyurethane) to cushion the impact and increase the coefficient of friction. When the upper opening plate 454 and lower opening plate 455 of the first opening mechanism 45 and the second opening mechanism 46 are inserted forward into the opening of the packaging bag, the left and right sides of the opening of the packaging bag enter the clamping gaps 4519 on the first opening mechanism 45 and the second opening mechanism 46 respectively. After the upper opening plate 454 swings outward under the drive of the swing mechanism, while opening the bag opening to the left and right, the outer side 4541 of the upper opening plate 454 and the head 4521 of the rubber-coated screw 4520 together clamp the bag opening edge 101 in the clamping gap 4519, so that the position of the bag opening of the packaging bag remains stable.

[0076] The front end of the bag opening edge clamping plate 4518 is provided with a strip-shaped limiting hole 4523. The screw portion 4524 of the rubber-coated screw 4520 passes through the strip-shaped limiting hole 4523. A locking nut 4525 is installed on the screw portion 4524 of the rubber-coated screw 4520. The locking nut 4525 and the head 4521 of the rubber-coated screw together clamp the front end of the bag opening edge clamping plate 4518. By adjusting the position of the screw portion 4524 of the rubber-coated screw in the strip-shaped limiting hole 4523, the position of the head 4521 of the rubber-coated screw can be adjusted, thereby adjusting the clamped position of the bag opening edge. In this embodiment, the strip-shaped limiting hole 4523 is vertically oriented, making the height position of the head 4521 of the rubber-coated screw adjustable.

[0077] The front end of the bag opening edge clamping plate 4518 is located behind the front end of the upper bag opening plate 454.

[0078] The bag opening base 42 is provided with a material support plate 444, which together with the first feed plate 43 and the second feed plate 44 form a material entry channel. The lower bag opening plate 455 of the first feed plate 43, the second feed plate 44, the first opening mechanism 45 and the second opening mechanism 46 are all located on the upper side of the material support plate 444.

[0079] The bag opening device also includes a first movable bag pressing plate 445 and a second movable bag pressing plate 446. The first movable bag pressing plate 445 is mounted on a first left-right sliding seat 47, and the second movable bag pressing plate 446 is mounted on a second left-right sliding seat 48. A fixed bag pressing part 447 is provided in the middle of the front edge of the material support plate 444. The functions and working principles of the first movable bag pressing plate 445, the second movable bag pressing plate 446, and the fixed bag pressing part 447 are the same as those of the first movable bag pressing plate, the second movable bag pressing plate, and the fixed bag pressing part in the bag pressing device of the packaging machine disclosed in Chinese Utility Model Patent Specification No. CN207417259U. The difference is that in this embodiment, the first movable bag pressing plate 445 moves together with the first left-right sliding seat 47, and the second movable bag pressing plate 446 moves together with the second left-right sliding seat 48. It is not necessary to set up a separate movable bag pressing plate position adjustment mechanism to adjust the position of the first movable bag pressing plate and the second movable bag pressing plate in the left-right direction.

[0080] like Figure 10-12 As shown, the material compression device 2 includes a compression mechanism 22, a lifting platform 23, and a lifting mechanism 24 for the lifting platform. The lifting mechanism 24 is mounted on the frame 1. The lifting platform 23 is mounted on the power output end of the lifting mechanism 24. The compression mechanism 22 includes a third left-right sliding seat 221, a fourth left-right sliding seat 222, a first push plate 223, a second push plate 224, and a push plate drive mechanism 225 that can drive the third left-right sliding seat 221 and the fourth left-right sliding seat 222 to move closer to or further away from each other in the left-right direction. The push plate drive mechanism 225 is mounted on the frame 1. The third left-right sliding seat 221 and the fourth left-right sliding seat 222 can be movably mounted on the lifting platform 23. The first push plate 223 is mounted on the upper end of the third left-right sliding seat 221, and the second push plate 224 is mounted on the upper end of the fourth left-right sliding seat 222.

[0081] The push plate drive mechanism 225 includes a fifth left-right translation seat 2251 and a sixth left-right translation seat 2252. The frame 1 is provided with a second left-right translation mechanism 211 that can drive the fifth left-right translation seat 2251 and the sixth left-right translation seat 2252 to move closer to or further away from each other in the left-right direction. The third left-right translation seat 221 is provided with a first lifting guide rail 2211 running vertically. The fifth left-right translation seat 2251 is provided with a first guide groove 22511 that slides with the first lifting guide rail 2211. The fourth left-right translation seat 222 is provided with a second lifting guide rail 2221 running vertically. The sixth left-right translation seat 2252 is provided with a second guide groove 22521 that slides with the second lifting guide rail 2221. When the lifting mechanism 24 drives the lifting platform 23 to rise or fall, the first lifting guide rail 2211 and the second lifting guide rail 2221 are respectively in the first guide groove 22511 and the second guide groove 22521, and the first lifting guide rail 2211 moves up and down along the first guide groove 22511, and the second lifting guide rail 2221 moves up and down along the second guide groove 22521.

[0082] The second left-right translation mechanism 211 includes a first compression motor 2111, a first compression translation screw 2112, a first compression translation nut 2113, a second compression motor 2114, a second compression translation screw 2115, and a second compression translation nut 2116. The first compression motor 2111 and the second compression motor 2114 are both mounted on the frame 1. The first compression translation screw 2112 and the second compression translation screw 2115 are rotatably mounted on the frame 1. All 115 are arranged in a left-right direction. The first compression motor 2111 is driven by the first compression translation screw 2112, and the second compression motor 2114 is driven by the second compression translation screw 2115. The first compression translation nut 2113 and the second compression translation nut 2116 are respectively fitted on the first compression translation screw 2112 and the second compression translation screw 2115. The first compression translation nut 2113 and the second compression translation nut 2116 are respectively connected to the fifth left-right translation seat 2251 and the sixth left-right translation seat 2252.

[0083] The frame 1 is provided with a first translation guide rail 212 running left and right. The fifth left and right translation seat 2251 is provided with a first translation slider 22512 that slides in cooperation with the first translation guide rail 212. The sixth left and right translation seat 2252 is provided with a second translation slider 22522 that slides in cooperation with the first translation guide rail 212. When the fifth left and right translation seat 2251 and the sixth left and right translation seat 2252 translate, the first translation slider 22512 and the second translation slider 22522 slide along the first translation guide rail 212 of the frame 1 to ensure the stability of the translation of the fifth left and right translation seat 2251 and the sixth left and right translation seat 2252.

[0084] The lifting platform 23 is provided with a second translation guide rail 231 running left and right. The third left and right translation seat 221 is provided with a third translation slider 2212 that slides in cooperation with the second translation guide rail 231. The fourth left and right translation seat 222 is provided with a fourth translation slider 2222 that slides in cooperation with the second translation guide rail 231. When the third left and right translation seat 221 and the fourth left and right translation seat 222 move, the third translation slider 2212 and the fourth translation slider 2222 slide along the second translation guide rail 231 of the lifting platform 23, ensuring that the third left and right translation seat 221 and the fourth left and right translation seat 222 move stably.

[0085] The lifting mechanism 24 of the lifting platform includes a lifting drive motor 241, a transmission shaft 242, a first swing arm 243, a second swing arm 244, a fifth connecting rod 245, and a sixth connecting rod 246. The lifting drive motor 241 is mounted on the frame 1, and the transmission shaft 242 is rotatably mounted on the frame 1 in the horizontal direction. The transmission shaft 242 is connected to the lifting drive motor 241. The fixed ends of the first swing arm 243 and the second swing arm 244 are respectively mounted on both ends of the transmission shaft 242. The upper end of the fifth connecting rod 245 is hinged to the lifting platform 23, and the lower end of the fifth connecting rod 245 is hinged to the movable end of the first swing arm 243. The upper end of the sixth connecting rod 246 is hinged to the lifting platform 23, and the lower end of the sixth connecting rod 246 is hinged to the movable end of the second swing arm 244. Since the lifting mechanism 24 of the lifting platform is composed of a lifting drive motor 241, a transmission shaft 242, a first swing arm 243, a second swing arm 244, a fifth link 245, and a sixth link 246, the lifting drive motor 241 drives the transmission shaft 242 to rotate. The transmission shaft 242 drives the first swing arm 243 and the second swing arm 244 to rotate synchronously around the transmission shaft 242 (which can swing back and forth at a certain angle). Furthermore, the fifth link 245 and the sixth link 246 drive the lifting platform 23 to move up and down. As the lifting drive motor 241 rotates, the lifting platform 23 makes periodic up and down movements, which are coordinated with the movement rhythm of the stacker and the pusher device, thereby further improving work efficiency.

[0086] The lifting mechanism 24 of the lifting platform also includes a third lifting guide rail 247 and a fourth lifting guide rail 248. Both the third and fourth lifting guide rails 247 and 248 are mounted on the lifting platform 23 and run vertically. The frame 1 is provided with a third guide groove 213 and a fourth guide groove 214, both running vertically. The third and fourth lifting guide rails 247 and 248 are respectively located within the third and fourth guide grooves 213 and 214, respectively. The third lifting guide rail 247 can move vertically along the third guide groove 213, and the fourth lifting guide rail 248 can move vertically along the fourth guide groove 214. When the lifting platform 23 rises / falls, the third and fourth lifting guide rails 247 and 248 slide along the third and fourth guide grooves 213 and 214 on the frame 1, respectively, ensuring smooth lifting of the lifting platform 23.

[0087] The lifting mechanism 24 of the lifting platform also includes a first support plate 249 and a second support plate 240. The first support plate 249 and the second support plate 240 are both installed on the lifting platform 23. The third lifting guide rail 247 and the fourth lifting guide rail 248 are respectively installed on the first support plate 249 and the second support plate 240. The first support plate 249 and the second support plate 240 are each provided with an upper limit block 2491 and a lower limit block 2492. The outer walls of the third guide groove 213 and the fourth guide groove 214 are each provided with a stop block 2131. Each stop block 2131 is located between the corresponding upper limit block 2491 and the lower limit block 2492. When the lifting platform 23 rises to its highest point, the upper limit block 2491 of each support plate contacts the stop block 2131 of the corresponding guide groove, causing the lifting platform 23 to stop rising; when the lifting platform 23 falls to its lowest point, the lower limit block 2492 of each support plate contacts the stop block 2131 of the corresponding guide groove, causing the lifting platform 23 to stop falling, thus accurately controlling the positioning accuracy and ensuring flush docking with the stacker and bag opening device.

[0088] refer to Figure 12Both the first push plate 223 and the second push plate 224 have ventilation chambers 2231 inside. The inner surfaces of the first push plate 223 and the second push plate 224 each have multiple ventilation holes 2232 communicating with the ventilation chambers 2231. The frame 1 is equipped with a compressed air source 215, the outlet of which communicates with the ventilation chambers 2231. This creates air pressure surfaces on the first push plate 223 and the second push plate 224, reducing friction between the sheet material and the push plates. Since the surface of the sheet material is mostly non-woven fabric, it easily adheres to the push plates during compression. The compressed air source 215 supplies air to the ventilation chamber 2231 and each ventilation hole 2232, forming a uniform air pressure surface (slight positive pressure) on the inner side of the first push plate 223 and the second push plate 224. This creates a tiny air film gap between the sheet material and the first push plate 223 and the second push plate 224, reducing the friction between the sheet material and the first push plate 223 and the second push plate 224. This ensures that the sheet material will not move with the first push plate 223 and the second push plate 224 when the push plates are opened after compression, thus ensuring neat stacking.

[0089] The working principle of this packaging machine is briefly described below:

[0090] When this packaging machine is working, the material compression device 2 compresses a stack of sheet materials (such as a stack of diapers, usually from a stacker crane, which stacks the sheet materials); the bag feeding device 3 delivers the packaging bag to the bottom of the suction device, which sucks up the upper side of the packaging bag to open the bag opening. The first opening mechanism 45 and the second opening mechanism 46 are inserted forward into the bag opening (after the first opening mechanism 45 and the second opening mechanism 46 are inserted into the bag opening, the suction device can release the upper side of the packaging bag). The adsorption of the material causes the bag opening to open to a suitable width and height. Then, the pusher mechanism pushes a stack of compacted sheet material from the material compression device 2. The sheet material passes through the gap between the first feed plate 43 and the second feed plate 44, and then through the gap between the first opening mechanism 45 and the second opening mechanism 46 into the bag. Under the further push of the pusher mechanism, the bag containing the sheet material reaches the sealing device 5, which seals the bag opening.

[0091] The working principle of the bag opening device is briefly described below:

[0092] When the spacing needs to be adjusted (for example, when the spacing needs to be adjusted according to the size of the bag opening), the first left and right translation mechanism drives the first left and right translation seat 47 and the second left and right translation seat 48 to move closer or further apart in the left and right directions. This allows the spacing between the first opening mechanism 45 and the second opening mechanism 46, the spacing between the first feeding plate 43 and the second feeding plate 44, the spacing between the first suction nozzle 49 and the second suction nozzle 410, and the spacing between the first movable bag pressing plate 445 and the second movable bag pressing plate 446 to be adjusted at one time. This ensures that the spacing between the corresponding parts on the left and right sides meets the production requirements, and the spacing adjustment between the corresponding parts on the left and right sides is carried out synchronously, which is convenient and quick. Moreover, before and after adjustment, the relative positions of the first feed plate 43, the first spreading mechanism 45, the first suction nozzle 49, and the first movable pressing plate 445 on the first left and right translation seat 47 remain unchanged, and the relative positions of the second feed plate 44, the second spreading mechanism 46, the second suction nozzle 410, and the second movable pressing plate 446 on the second left and right translation seat 48 remain unchanged, so recalibration is usually not required.

[0093] When this bag-opening device is working, the bag-feeding device delivers the packaging bag to the bottom of the suction device. The suction device lifts the upper side of the packaging bag, opening the bag opening. (After the first suction nozzle 49 and the second suction nozzle 410 hold the upper side of the packaging bag, the power output shaft of the suction nozzle horizontal bar lifting drive motor 421 drives the first rotating shaft 422 to rotate at a certain angle. The first rotating shaft 422 drives the suction nozzle horizontal bar 411 to rise through the first connecting rod 423 and the second connecting rod 424. This, in turn, drives the first suction nozzle upright 414 and the second suction nozzle upright 415 to rise simultaneously through the first suction nozzle slider 412 and the second suction nozzle slider 413, respectively.) 415 drives the first suction nozzle 49 and the second suction nozzle 410 to rise simultaneously. The first opening mechanism 45 and the second opening mechanism 46 are inserted forward into the opening of the packaging bag (after the first opening mechanism 45 and the second opening mechanism 46 are inserted into the opening, the first suction nozzle 49 and the second suction nozzle 410 can release their suction on the upper side of the packaging bag), so that the opening of the packaging bag opens to a suitable width and height. Then, the pusher mechanism pushes the sheet material (such as a stack of compacted diapers). The sheet material passes through the gap between the first feed plate 43 and the second feed plate 44, and then through the gap between the first opening mechanism 45 and the second opening mechanism 46 into the packaging bag.

[0094] The working principle of the first opening mechanism 45 and the second opening mechanism 46 for opening the bag is briefly described below:

[0095] When this bag opening mechanism is working, in the initial state, the front ends of the upper bag opening plate 454 and the lower bag opening plate 455 of the first opening mechanism 45 and the second opening mechanism 46 are close to each other. After the bag feeding device delivers the packaging bag to the bottom of the suction device, and the suction device lifts the upper side of the packaging bag to open the bag opening, the upper bag opening plate 454 and the lower bag opening plate 455 of the first opening mechanism 45 and the second opening mechanism 46 are inserted forward into the bag opening, and simultaneously swing outward around the swing axis 452 under the drive of the swing mechanism, causing the bag opening to open to the left and right. At the same time, due to the outward swing of the movable seat 453 around the swing axis 452, the first end of the first opening and closing connecting rod 457 is positioned... Changes occur (for example, the first end of the first opening and closing link 457 is closer to the second end of the second opening and closing link 458). Under the pushing action of the second opening and closing link 458, the second end of the first opening and closing link 457 swings around the opening and closing pivot 456. The opening and closing pivot 456 rotates, thereby driving the front end of the upper opening plate 454 to swing upward. The distance between the front end of the upper opening plate 454 and the front end of the lower opening plate 455 increases, causing the bag opening to open in the up and down direction, thereby opening the bag opening to a suitable width and height. When a reset is required, the first opening mechanism 45 and the second opening mechanism 46 retract. Driven by the swing mechanism, the upper opening plate 454 and the lower opening plate 455 swing inward around the swing axis 452. At the same time, as the movable seat 453 swings inward around the swing axis 452, the second end of the first opening link 457 swings in the opposite direction around the opening axis 456 under the action of the second opening link 458. The opening axis 456 rotates in the opposite direction, thereby driving the front end of the upper opening plate 454 to swing downward, and the front end of the upper opening plate 454 and the front end of the lower opening plate 455 move closer to each other.

[0096] The working principle of material compression device 2 is briefly described below:

[0097] During operation, the compression mechanism 22 is installed between the stacker and the bag opening device via the lifting platform mechanism 24 and the lifting platform 23. When the lifting platform mechanism 24 drives the lifting platform 23 to the lowest point, the lifting platform 23 and the stacker are on the same horizontal plane. The push plate drive mechanism 225 pulls the third left-right sliding seat 221 and the first push plate 223 to the left, and the fourth left-right sliding seat 222 and the second push plate 224 to the right, so that the first push plate 223 and the second push plate 224 are in an open state, forming a space between the first push plate 223 and the second push plate 224 to accommodate the stacked sheet material. The stacker pushes the stacked sheet material between the first push plate 223 and the second push plate 224 on the lifting platform 23 to complete the receiving of the material. When the lifting platform 23 rises, the third left-right sliding seat 221 and the fourth left-right sliding seat 222 rise synchronously with the lifting platform 23; simultaneously, the push plate drive mechanism 225 is activated, driving the first push plate 223 and the second push plate 224 to move towards each other, applying extrusion pressure to compress the entire stack of sheet material. When the lifting platform lifting mechanism 24 drives the lifting platform 23 to its highest point, the lifting platform 23 and the bag opening device are on the same horizontal plane. The pusher device pushes the compressed stack of sheet material directly from the compression mechanism 22 into the bag opening device and into the packaging bag. Subsequently, the push plate drive mechanism 225 drives the first push plate 223 and the second push plate 224 to open, and the lifting platform lifting mechanism 24 drives the lifting platform 23 to descend and reset, entering the next cycle.

[0098] Example 2, Reference Figure 13 In this embodiment, the rubber-coated screw 4520 is installed on the bag opening edge clamping plate 4518 as follows: the front end of the bag opening edge clamping plate 4518 is provided with a screw hole 4526, and the screw portion 4524 of the rubber-coated screw 4520 is screwed into the screw hole 4526. By adjusting the screw depth of the screw portion 4524, the initial gap between the head 4521 of the rubber-coated screw and the outer side surface 4541 of the upper opening plate 454 can be adjusted, thereby adjusting the clamping force when the outer side surface 4541 of the upper opening plate 454 and the head 4521 of the rubber-coated screw jointly clamp the bag opening edge. The rest of the structure in this embodiment is the same as in embodiment 1.

[0099] In other embodiments, the suction nozzle lifting mechanism may also include a first suction nozzle lifting drive mechanism capable of driving the first suction nozzle to lift and lower, and a second suction nozzle lifting drive mechanism capable of driving the second suction nozzle to lift and lower. The first suction nozzle lifting drive mechanism is mounted on a first left-right sliding seat, and its power output end is connected to the first suction nozzle. The second suction nozzle lifting drive mechanism is mounted on a second left-right sliding seat, and its power output end is connected to the second suction nozzle. Both the first and second suction nozzle lifting drive mechanisms can be cylinders, with the piston rod pointing upwards or downwards, and the piston rod serving as the power output end. Alternatively, the first and second suction nozzle lifting drive mechanisms can employ a structure where a motor and a synchronous belt (or chain, gear / rack, nut / screw) work together.

[0100] In other embodiments, the forward and backward translation mechanism may also include a first forward and backward translation drive device capable of driving a first forward and backward translation seat to translate forward and backward relative to a first left and right translation seat, and a second forward and backward translation drive device capable of driving a second forward and backward translation seat to translate forward and backward relative to a second left and right translation seat. The first forward and backward translation drive device is mounted on the first left and right translation seat, and the second left and right translation seat is mounted on the second left and right translation seat. The first forward and backward translation drive device and the second forward and backward translation drive device may be cylinders, with the piston rod of the cylinder facing forward or backward, and the piston rod of the cylinder connected to the first forward and backward translation seat and the second forward and backward translation seat. The first forward and backward translation drive device and the second forward and backward translation drive device may also be a structure in which a motor and a synchronous belt (or chain, gear / rack, nut / screw) cooperate.

[0101] In other embodiments, the first left-right translation mechanism may use only a left-right translation drive motor to drive the opening translation screw to rotate. The left-right translation drive motor is mounted on the opening base, and the opening translation screw is connected to the power output shaft of the left-right translation drive motor. The left-right translation drive motor drives the opening translation screw to rotate forward or backward, which can drive the two opening translation nuts to move closer or further apart, thereby causing the first left-right translation seat and the second left-right translation seat to move closer or further apart.

[0102] In other embodiments, the first left-right translation mechanism may use only a first adjusting handwheel to drive the opening translation screw to rotate. The first adjusting handwheel is installed on one end of the opening translation screw. Manually rotating the first adjusting handwheel causes the opening translation screw to rotate forward or backward, which can drive the two opening translation nuts to move closer or further apart, thereby causing the first left-right translation seat and the second left-right translation seat to move closer or further apart.

[0103] In another embodiment, as a different implementation of the swing mechanism, the swing mechanism includes a swing cylinder and a first swing connecting rod. The cylinder body of the swing cylinder is hinged to the support of the opening mechanism. The first end of the first swing connecting rod is connected to the swing shaft or the movable seat, and the second end of the first swing connecting rod is hinged to the piston rod of the swing cylinder. When the piston rod of the swing cylinder extends or retracts, it drives the swing shaft to rotate through the first swing connecting rod, thereby realizing the swing of the movable seat and the upper and lower opening bags.

Claims

1. A simple packaging machine, comprising a frame, a material compression device, a bag feeding device, a bag opening device, a sealing device and a pushing mechanism, the material compression device, the bag opening device and the sealing device are sequentially arranged on the frame, the pushing mechanism is arranged above the material compression device, and the bag feeding device is arranged on one side of the bag opening device; the bag opening device comprises a bag opening base, a suction device, a first feeding plate, a second feeding plate, a first opening mechanism and a second opening mechanism, the bag opening base is installed on the frame, the first feeding plate and the second feeding plate are arranged side by side, and the first opening mechanism and the second opening mechanism are arranged side by side, the suction device comprises a first bag suction nozzle, a second bag suction nozzle and a bag suction nozzle lifting mechanism capable of driving the two bag suction nozzles to lift, the first bag suction nozzle and the second bag suction nozzle are arranged side by side, characterized in that: The bag opening device further comprises a first left-right translation seat and a second left-right translation seat, and a first left-right translation mechanism is arranged on the bag opening base and capable of driving the first left-right translation seat and the second left-right translation seat to move towards or away from each other in the left-right direction; the first feeding plate, the first opening mechanism and the first bag suction nozzle are all mounted on the first left-right translation seat, and the second feeding plate, the second opening mechanism and the second bag suction nozzle are all mounted on the second left-right translation seat; The first opening mechanism and the second opening mechanism both comprise an opening mechanism support, a swing pivot, a movable seat, an upper bag opening plate, a lower bag opening plate, an opening-closing pivot, a first opening-closing connecting rod and a second opening-closing connecting rod; the swing pivot is rotatably mounted on the opening mechanism support and extends in the up-down direction, the movable seat is mounted on the swing pivot, the opening-closing pivot is rotatably mounted on the movable seat and extends in the horizontal direction, the rear end of the upper bag opening plate is connected with the opening-closing pivot, the rear end of the lower bag opening plate is connected with the movable seat, the first end of the first opening-closing connecting rod is connected with the opening-closing pivot, the second end of the first opening-closing connecting rod is hingedly connected with the first end of the second opening-closing connecting rod, and the second end of the second opening-closing connecting rod is hingedly connected with the opening mechanism support; the opening mechanism support is provided with a swing mechanism capable of driving the swing pivot to rotate.

2. A simple-to-operate packaging machine according to claim 1, characterized in that: The bag suction nozzle lifting mechanism comprises a bag suction nozzle cross bar, a first bag suction nozzle sliding block, a second bag suction nozzle sliding block, a first bag suction nozzle vertical rod, a second bag suction nozzle vertical rod, a first vertical rod guide block and a second vertical rod guide block, and the rack is provided with a bag suction nozzle cross bar lifting driving mechanism capable of driving the bag suction nozzle cross bar to lift; The bag suction nozzle cross bar is provided with a left-right extending bag suction nozzle cross guide rail, the first bag suction nozzle sliding block and the second bag suction nozzle sliding block are both mounted on the bag suction nozzle cross guide rail and capable of moving along the bag suction nozzle cross guide rail, the first bag suction nozzle vertical rod is connected with the first bag suction nozzle sliding block, the first bag suction nozzle is mounted on the upper end of the first bag suction nozzle vertical rod, the second bag suction nozzle vertical rod is connected with the second bag suction nozzle sliding block, and the second bag suction nozzle is mounted on the upper end of the second bag suction nozzle vertical rod; The first vertical rod guide block is mounted on the first left-right translation seat, the first vertical rod guide block is provided with an up-down extending first vertical rod guide slot or a first vertical rod guide hole, the first bag suction nozzle vertical rod is located in the first vertical rod guide slot or the first vertical rod guide hole, and the first bag suction nozzle vertical rod is capable of lifting relative to the first vertical rod guide block; the second vertical rod guide block is mounted on the second left-right translation seat, the second vertical rod guide block is provided with an up-down extending second vertical rod guide slot or a second vertical rod guide hole, the second bag suction nozzle vertical rod is located in the second vertical rod guide slot or the second vertical rod guide hole, and the second bag suction nozzle vertical rod is capable of lifting relative to the second vertical rod guide block.

3. A simple-to-operate packaging machine according to claim 1 or 2, characterized in that: The first left-right translation mechanism comprises a first bag-opening translation guide rail, a bag-opening translation screw and two bag-opening translation nuts; the first bag-opening translation guide rail is arranged on the bag-opening base and extends in the left-right direction; the first left-right translation seat and the second left-right translation seat are respectively provided with a first sliding block in sliding cooperation with the first bag-opening translation guide rail; the bag-opening translation screw is rotatably arranged on the bag-opening base in the horizontal direction; the bag-opening translation screw is provided with a first forward threaded section and a first reverse threaded section; the two bag-opening translation nuts are respectively screwed with the first forward threaded section and the first reverse threaded section; the two bag-opening translation nuts are respectively connected with the first left-right translation seat and the second left-right translation seat; The first left-right translation seat and the second left-right translation seat are respectively provided with a locking structure in cooperation with the first bag-opening translation guide rail; The locking structure comprises a locking sliding block, a locking bolt and a locking nut; the locking sliding block comprises a front clamping portion and a rear clamping portion; the upper end of the front clamping portion is integrally connected with the upper end of the rear clamping portion; the middle part of the front clamping portion and the middle part of the rear clamping portion have a gap therebetween; the lower part of the front clamping portion and the lower part of the rear clamping portion are respectively provided with a sliding groove matched with the first bag-opening translation guide rail; the middle part of the front clamping portion is provided with a front-to-back front through hole; the middle part of the rear clamping portion is provided with a front-to-back rear through hole; the front through hole and the rear through hole are aligned with each other; the rod part of the locking bolt passes through the front through hole and the rear through hole; the head part of the locking bolt and the locking nut are respectively arranged on the front side and the rear side of the locking sliding block.

4. The simple-to-operate packaging machine according to claim 1 or 2, characterized in that: The bag-opening device further comprises a first front-rear translation seat, a second front-rear translation seat and a front-rear translation mechanism; the front-rear translation mechanism is capable of driving the first front-rear translation seat and the second front-rear translation seat to respectively translate forward and backward relative to the first left-right translation seat and the second left-right translation seat; the first opening mechanism is mounted on the first front-rear translation seat; the second opening mechanism is mounted on the second front-rear translation seat; The first left-right translation seat and the second left-right translation seat are both provided with a second bag-opening translation guide rail extending in the front-rear direction; the first front-rear translation seat is provided with a second sliding block matched with the second bag-opening translation guide rail on the first left-right translation seat; the second front-rear translation seat is provided with a second sliding block matched with the second bag-opening translation guide rail on the second left-right translation seat; The front-rear translation mechanism comprises a front-rear translation driving motor, a second rotating shaft, a third connecting rod, a fourth connecting rod and a translation seat cross bar; the second rotating shaft is rotatably arranged on the bag-opening base; one end of the third connecting rod is connected with the second rotating shaft; the other end of the third connecting rod is hingedly connected with one end of the fourth connecting rod; the other end of the fourth connecting rod is hingedly connected with the translation seat cross bar; the power output shaft of the front-rear translation driving motor is in transmission connection with the second rotating shaft; the first front-rear translation seat and the second front-rear translation seat are connected with the translation seat cross bar.

5. A simple-to-operate packaging machine according to claim 1 or 2, characterized in that: The second end of the first opening-closing connecting rod is hingedly connected with the first end of the second opening-closing connecting rod through a first spherical hinge; the second end of the second opening-closing connecting rod is hingedly connected with the opening mechanism support through a second spherical hinge. The swing mechanism comprises a swing cylinder, a first swing connecting rod, a second swing connecting rod and a third swing connecting rod, the cylinder body of the swing cylinder is hinged to the distraction mechanism support, a hinge seat is arranged on the piston rod of the swing cylinder, a pin shaft is arranged on the hinge seat, the first end of the first swing connecting rod is connected to the swing shaft or the movable seat, the second end of the first swing connecting rod is hinged to the first end of the second swing connecting rod, the second end of the second swing connecting rod is provided with a circular pin hole matched with the pin shaft and in sleeved fit, the first end of the third swing connecting rod is hinged to the distraction mechanism support, and the second end of the third swing connecting rod is provided with a circular pin hole matched with the pin shaft and in sleeved fit.

6. A simple-to-operate packaging machine according to claim 1 or 2, characterized in that: The distraction mechanism support is provided with a bag opening edge clamping plate, and the bag opening edge clamping plate is located outside the upper bag opening plate.

7. A simple-to-operate packaging machine according to claim 6, characterized in that: The front end of the bag opening edge clamping plate is provided with a rubber-coated screw, the head of the rubber-coated screw is located on the side of the bag opening edge clamping plate facing the upper bag opening plate, and the head of the rubber-coated screw and the outer side surface of the upper bag opening plate have the clamping gap.

8. A simple-to-operate packaging machine according to claim 1 or 2, characterized in that The material compression device comprises a compression mechanism, a lifting platform and a lifting platform lifting mechanism; the lifting platform lifting mechanism is installed on the rack; the lifting platform is installed on the power output end of the lifting platform lifting mechanism; the compression mechanism comprises a third left-right translation seat, a fourth left-right translation seat, a first push plate, a second push plate and a push plate driving mechanism capable of driving the third left-right translation seat and the fourth left-right translation seat to move closer to or away from each other in the left-right direction, the push plate driving mechanism is installed on the rack, and the third left-right translation seat and the fourth left-right translation seat are movably installed on the lifting platform; the first push plate is installed on the upper end of the third left-right translation seat, and the second push plate is installed on the upper end of the fourth left-right translation seat. The push plate driving mechanism comprises a fifth left-right translation seat and a sixth left-right translation seat, and the rack is provided with a second left-right translation mechanism capable of driving the fifth left-right translation seat and the sixth left-right translation seat to move closer to or away from each other in the left-right direction; the third left-right translation seat is provided with a first lifting guide rail extending in the up-down direction, the fifth left-right translation seat is provided with a first guide groove in sliding fit with the first lifting guide rail, the fourth left-right translation seat is provided with a second lifting guide rail extending in the up-down direction, and the sixth left-right translation seat is provided with a second guide groove in sliding fit with the second lifting guide rail.

9. A simple-to-operate packaging machine according to claim 8, characterized in that: The first push plate and the second push plate are both provided with an air passage in the inside, and a plurality of air holes in communication with the air passage are arranged on the inner side surface of the first push plate and the inner side surface of the second push plate; the rack is provided with a compressed air source, and the air outlet of the compressed air source is in communication with the air passage.

10. The simple-to-operate packaging machine of claim 8, characterized in that: The second left-right translation mechanism comprises a first compression motor, a first compression translation screw rod, a first compression translation nut, a second compression motor, a second compression translation screw rod and a second compression translation nut, the first compression motor and the second compression motor are both mounted on the rack, the first compression translation screw rod and the second compression translation screw rod are both rotatably mounted on the rack, and the first compression translation screw rod and the second compression translation screw rod are both arranged in the left-right direction, the first compression motor is in transmission connection with the first compression translation screw rod, the second compression motor is in transmission connection with the second compression translation screw rod, the first compression translation nut and the second compression translation nut are respectively sleeved on the first compression translation screw rod and the second compression translation screw rod, and the first compression translation nut and the second compression translation nut are respectively connected with the fifth left-right translation seat and the sixth left-right translation seat; The rack is provided with a first translation guide rail extending in the left-right direction, the fifth left-right translation seat is provided with a first translation sliding block in sliding cooperation with the first translation guide rail, and the sixth left-right translation seat is provided with a second translation sliding block in sliding cooperation with the first translation guide rail; The lifting platform is provided with a second translation guide rail extending in the left-right direction, the third left-right translation seat is provided with a third translation sliding block in sliding cooperation with the second translation guide rail, and the fourth left-right translation seat is provided with a fourth translation sliding block in sliding cooperation with the second translation guide rail; The lifting platform lifting mechanism comprises a lifting platform lifting drive motor, a transmission shaft, a first swing arm, a second swing arm, a fifth connecting rod and a sixth connecting rod, the lifting platform lifting drive motor is mounted on the rack, the transmission shaft is rotatably mounted on the rack in the horizontal direction, and the transmission shaft is in transmission connection with the lifting platform lifting drive motor; the fixed ends of the first swing arm and the second swing arm are respectively mounted on the two ends of the transmission shaft; the upper end of the fifth connecting rod is hingedly connected with the lifting platform, and the lower end of the fifth connecting rod is hingedly connected with the movable end of the first swing arm; the upper end of the sixth connecting rod is hingedly connected with the lifting platform, and the lower end of the sixth connecting rod is hingedly connected with the movable end of the second swing arm; The lifting platform lifting mechanism further comprises third lifting guide rails and fourth lifting guide rails, the third lifting guide rails and the fourth lifting guide rails are both mounted on the lifting platform and extend in the up-down direction, the rack is provided with third guide grooves and fourth guide grooves, the third guide grooves and the fourth guide grooves both extend in the up-down direction, the third lifting guide rails and the fourth lifting guide rails are respectively located in the third guide grooves and the fourth guide grooves, and the third lifting guide rails can move up and down along the third guide grooves, and the fourth lifting guide rails can move up and down along the fourth guide grooves; The lifting platform lifting mechanism further comprises first support plates and second support plates, the first support plates and the second support plates are both mounted on the lifting platform, the third lifting guide rails and the fourth lifting guide rails are respectively mounted on the first support plates and the second support plates, the first support plates and the second support plates are both provided with upper limit blocks and lower limit blocks, the outer walls of the third guide grooves and the fourth guide grooves are both provided with stop blocks, and each stop block is located between the corresponding upper limit block and the lower limit block.

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